ExprConstant.cpp revision af2c7a194592401394233b7cbcdd3cfd0a7a38dd
1b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner//===--- ExprConstant.cpp - Expression Constant Evaluator -----------------===// 2c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson// 3c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson// The LLVM Compiler Infrastructure 4c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson// 5c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson// This file is distributed under the University of Illinois Open Source 6c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson// License. See LICENSE.TXT for details. 7c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson// 8c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson//===----------------------------------------------------------------------===// 9c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson// 10c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson// This file implements the Expr constant evaluator. 11c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson// 12c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson//===----------------------------------------------------------------------===// 13c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson 14c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson#include "clang/AST/APValue.h" 15c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson#include "clang/AST/ASTContext.h" 16199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck#include "clang/AST/CharUnits.h" 1719cc4abea06a9b49e0e16a50d335c064cd723572Anders Carlsson#include "clang/AST/RecordLayout.h" 180fe52e1bcaa69ba127f1bda036f057fec1f478deSeo Sanghyeon#include "clang/AST/StmtVisitor.h" 198ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor#include "clang/AST/TypeLoc.h" 20500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/AST/ASTDiagnostic.h" 218ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor#include "clang/AST/Expr.h" 221b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.h" 2306a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson#include "clang/Basic/TargetInfo.h" 247462b39a9bccaf4392687831036713f09f9c0681Mike Stump#include "llvm/ADT/SmallString.h" 254572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump#include <cstring> 264572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump 27c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlssonusing namespace clang; 28f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerusing llvm::APSInt; 29d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanusing llvm::APFloat; 30c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson 3187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// EvalInfo - This is a private struct used by the evaluator to capture 3287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// information about a subexpression as it is folded. It retains information 3387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// about the AST context, but also maintains information about the folded 3487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// expression. 3587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// 3687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// If an expression could be evaluated, it is still possible it is not a C 3787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// "integer constant expression" or constant expression. If not, this struct 3887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// captures information about how and why not. 3987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// 4087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// One bit of information passed *into* the request for constant folding 4187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// indicates whether the subexpression is "evaluated" or not according to C 4287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// rules. For example, the RHS of (0 && foo()) is not evaluated. We can 4387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// evaluate the expression regardless of what the RHS is, but C only allows 4487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// certain things in certain situations. 45c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramernamespace { 46180f47959a066795cc0f409433023af448bb0328Richard Smith struct LValue; 47d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith struct CallStackFrame; 48bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith struct EvalInfo; 49d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 501bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith QualType getType(APValue::LValueBase B) { 511bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (!B) return QualType(); 521bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (const ValueDecl *D = B.dyn_cast<const ValueDecl*>()) 531bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith return D->getType(); 541bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith return B.get<const Expr*>()->getType(); 551bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith } 561bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith 57180f47959a066795cc0f409433023af448bb0328Richard Smith /// Get an LValue path entry, which is known to not be an array index, as a 58180f47959a066795cc0f409433023af448bb0328Richard Smith /// field declaration. 59180f47959a066795cc0f409433023af448bb0328Richard Smith const FieldDecl *getAsField(APValue::LValuePathEntry E) { 60180f47959a066795cc0f409433023af448bb0328Richard Smith APValue::BaseOrMemberType Value; 61180f47959a066795cc0f409433023af448bb0328Richard Smith Value.setFromOpaqueValue(E.BaseOrMember); 62180f47959a066795cc0f409433023af448bb0328Richard Smith return dyn_cast<FieldDecl>(Value.getPointer()); 63180f47959a066795cc0f409433023af448bb0328Richard Smith } 64180f47959a066795cc0f409433023af448bb0328Richard Smith /// Get an LValue path entry, which is known to not be an array index, as a 65180f47959a066795cc0f409433023af448bb0328Richard Smith /// base class declaration. 66180f47959a066795cc0f409433023af448bb0328Richard Smith const CXXRecordDecl *getAsBaseClass(APValue::LValuePathEntry E) { 67180f47959a066795cc0f409433023af448bb0328Richard Smith APValue::BaseOrMemberType Value; 68180f47959a066795cc0f409433023af448bb0328Richard Smith Value.setFromOpaqueValue(E.BaseOrMember); 69180f47959a066795cc0f409433023af448bb0328Richard Smith return dyn_cast<CXXRecordDecl>(Value.getPointer()); 70180f47959a066795cc0f409433023af448bb0328Richard Smith } 71180f47959a066795cc0f409433023af448bb0328Richard Smith /// Determine whether this LValue path entry for a base class names a virtual 72180f47959a066795cc0f409433023af448bb0328Richard Smith /// base class. 73180f47959a066795cc0f409433023af448bb0328Richard Smith bool isVirtualBaseClass(APValue::LValuePathEntry E) { 74180f47959a066795cc0f409433023af448bb0328Richard Smith APValue::BaseOrMemberType Value; 75180f47959a066795cc0f409433023af448bb0328Richard Smith Value.setFromOpaqueValue(E.BaseOrMember); 76180f47959a066795cc0f409433023af448bb0328Richard Smith return Value.getInt(); 77180f47959a066795cc0f409433023af448bb0328Richard Smith } 78180f47959a066795cc0f409433023af448bb0328Richard Smith 799a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith /// Determine whether the described subobject is an array element. 809a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith static bool SubobjectIsArrayElement(QualType Base, 819a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith ArrayRef<APValue::LValuePathEntry> Path) { 829a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith bool IsArrayElement = false; 839a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith const Type *T = Base.getTypePtr(); 849a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith for (unsigned I = 0, N = Path.size(); I != N; ++I) { 859a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith IsArrayElement = T && T->isArrayType(); 869a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith if (IsArrayElement) 879a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith T = T->getBaseElementTypeUnsafe(); 88180f47959a066795cc0f409433023af448bb0328Richard Smith else if (const FieldDecl *FD = getAsField(Path[I])) 899a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith T = FD->getType().getTypePtr(); 909a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith else 919a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith // Path[I] describes a base class. 929a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith T = 0; 939a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith } 949a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith return IsArrayElement; 959a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith } 969a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith 970a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// A path from a glvalue to a subobject of that glvalue. 980a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith struct SubobjectDesignator { 990a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// True if the subobject was named in a manner not supported by C++11. Such 1000a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// lvalues can still be folded, but they are not core constant expressions 1010a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// and we cannot perform lvalue-to-rvalue conversions on them. 1020a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith bool Invalid : 1; 1030a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith 1040a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// Whether this designates an array element. 1050a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith bool ArrayElement : 1; 1060a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith 1070a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// Whether this designates 'one past the end' of the current subobject. 1080a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith bool OnePastTheEnd : 1; 1090a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith 1109a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith typedef APValue::LValuePathEntry PathEntry; 1119a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith 1120a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// The entries on the path from the glvalue to the designated subobject. 1130a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith SmallVector<PathEntry, 8> Entries; 1140a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith 1150a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith SubobjectDesignator() : 1160a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Invalid(false), ArrayElement(false), OnePastTheEnd(false) {} 1170a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith 1189a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith SubobjectDesignator(const APValue &V) : 1199a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith Invalid(!V.isLValue() || !V.hasLValuePath()), ArrayElement(false), 1209a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith OnePastTheEnd(false) { 1219a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith if (!Invalid) { 1229a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith ArrayRef<PathEntry> VEntries = V.getLValuePath(); 1239a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith Entries.insert(Entries.end(), VEntries.begin(), VEntries.end()); 1249a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith if (V.getLValueBase()) 1251bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith ArrayElement = SubobjectIsArrayElement(getType(V.getLValueBase()), 1269a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith V.getLValuePath()); 1279a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith else 1289a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith assert(V.getLValuePath().empty() &&"Null pointer with nonempty path"); 129e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith OnePastTheEnd = V.isLValueOnePastTheEnd(); 1309a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith } 1319a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith } 1329a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith 1330a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith void setInvalid() { 1340a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Invalid = true; 1350a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Entries.clear(); 1360a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 1370a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// Update this designator to refer to the given element within this array. 1380a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith void addIndex(uint64_t N) { 1390a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (Invalid) return; 1400a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (OnePastTheEnd) { 1410a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith setInvalid(); 1420a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return; 1430a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 1440a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith PathEntry Entry; 1459a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith Entry.ArrayIndex = N; 1460a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Entries.push_back(Entry); 1470a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith ArrayElement = true; 1480a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 1490a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// Update this designator to refer to the given base or member of this 1500a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// object. 151180f47959a066795cc0f409433023af448bb0328Richard Smith void addDecl(const Decl *D, bool Virtual = false) { 1520a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (Invalid) return; 1530a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (OnePastTheEnd) { 1540a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith setInvalid(); 1550a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return; 1560a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 1570a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith PathEntry Entry; 158180f47959a066795cc0f409433023af448bb0328Richard Smith APValue::BaseOrMemberType Value(D, Virtual); 159180f47959a066795cc0f409433023af448bb0328Richard Smith Entry.BaseOrMember = Value.getOpaqueValue(); 1600a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Entries.push_back(Entry); 1610a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith ArrayElement = false; 1620a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 1630a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// Add N to the address of this subobject. 1640a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith void adjustIndex(uint64_t N) { 1650a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (Invalid) return; 1660a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (ArrayElement) { 167cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith // FIXME: Make sure the index stays within bounds, or one past the end. 1689a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith Entries.back().ArrayIndex += N; 1690a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return; 1700a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 1710a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (OnePastTheEnd && N == (uint64_t)-1) 1720a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith OnePastTheEnd = false; 1730a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith else if (!OnePastTheEnd && N == 1) 1740a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith OnePastTheEnd = true; 1750a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith else if (N != 0) 1760a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith setInvalid(); 1770a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 1780a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith }; 1790a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith 18047a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith /// A core constant value. This can be the value of any constant expression, 18147a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith /// or a pointer or reference to a non-static object or function parameter. 182e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// 183e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// For an LValue, the base and offset are stored in the APValue subobject, 184e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// but the other information is stored in the SubobjectDesignator. For all 185e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// other value kinds, the value is stored directly in the APValue subobject. 18647a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith class CCValue : public APValue { 18747a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith typedef llvm::APSInt APSInt; 18847a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith typedef llvm::APFloat APFloat; 189177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith /// If the value is a reference or pointer into a parameter or temporary, 190177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith /// this is the corresponding call stack frame. 191177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith CallStackFrame *CallFrame; 1920a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// If the value is a reference or pointer, this is a description of how the 1930a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith /// subobject was specified. 1940a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith SubobjectDesignator Designator; 19547a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith public: 196177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith struct GlobalValue {}; 197177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith 19847a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue() {} 19947a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith explicit CCValue(const APSInt &I) : APValue(I) {} 20047a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith explicit CCValue(const APFloat &F) : APValue(F) {} 20147a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue(const APValue *E, unsigned N) : APValue(E, N) {} 20247a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue(const APSInt &R, const APSInt &I) : APValue(R, I) {} 20347a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue(const APFloat &R, const APFloat &I) : APValue(R, I) {} 204177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith CCValue(const CCValue &V) : APValue(V), CallFrame(V.CallFrame) {} 2051bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith CCValue(LValueBase B, const CharUnits &O, CallStackFrame *F, 2060a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith const SubobjectDesignator &D) : 2079a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith APValue(B, O, APValue::NoLValuePath()), CallFrame(F), Designator(D) {} 208177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith CCValue(const APValue &V, GlobalValue) : 2099a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith APValue(V), CallFrame(0), Designator(V) {} 210e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith CCValue(const ValueDecl *D, bool IsDerivedMember, 211e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith ArrayRef<const CXXRecordDecl*> Path) : 212e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith APValue(D, IsDerivedMember, Path) {} 21347a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith 214177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith CallStackFrame *getLValueFrame() const { 21547a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith assert(getKind() == LValue); 216177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith return CallFrame; 21747a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith } 2180a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith SubobjectDesignator &getLValueDesignator() { 2190a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith assert(getKind() == LValue); 2200a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return Designator; 2210a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 2220a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith const SubobjectDesignator &getLValueDesignator() const { 2230a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return const_cast<CCValue*>(this)->getLValueDesignator(); 2240a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 22547a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith }; 22647a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith 227bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith /// A stack frame in the constexpr call stack. 228bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith struct CallStackFrame { 229bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith EvalInfo &Info; 230bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith 231bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith /// Parent - The caller of this stack frame. 232bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith CallStackFrame *Caller; 233bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith 23408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith /// CallLoc - The location of the call expression for this call. 23508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith SourceLocation CallLoc; 23608d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 23708d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith /// Callee - The function which was called. 23808d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith const FunctionDecl *Callee; 23908d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 240180f47959a066795cc0f409433023af448bb0328Richard Smith /// This - The binding for the this pointer in this call, if any. 241180f47959a066795cc0f409433023af448bb0328Richard Smith const LValue *This; 242180f47959a066795cc0f409433023af448bb0328Richard Smith 243bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith /// ParmBindings - Parameter bindings for this function call, indexed by 244bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith /// parameters' function scope indices. 245bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith const CCValue *Arguments; 246bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith 247bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith typedef llvm::DenseMap<const Expr*, CCValue> MapTy; 248bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith typedef MapTy::const_iterator temp_iterator; 249bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith /// Temporaries - Temporary lvalues materialized within this stack frame. 250bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith MapTy Temporaries; 251bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith 25208d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith CallStackFrame(EvalInfo &Info, SourceLocation CallLoc, 25308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith const FunctionDecl *Callee, const LValue *This, 254180f47959a066795cc0f409433023af448bb0328Richard Smith const CCValue *Arguments); 255bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith ~CallStackFrame(); 256bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith }; 257bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith 258dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith /// A partial diagnostic which we might know in advance that we are not going 259dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith /// to emit. 260dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith class OptionalDiagnostic { 261dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith PartialDiagnostic *Diag; 262dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith 263dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith public: 264dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith explicit OptionalDiagnostic(PartialDiagnostic *Diag = 0) : Diag(Diag) {} 265dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith 266dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith template<typename T> 267dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith OptionalDiagnostic &operator<<(const T &v) { 268dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith if (Diag) 269dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith *Diag << v; 270dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith return *this; 271dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith } 272dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith }; 273dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith 274c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer struct EvalInfo { 275dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith ASTContext &Ctx; 2761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2771e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith /// EvalStatus - Contains information about the evaluation. 2781e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith Expr::EvalStatus &EvalStatus; 279f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson 280d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith /// CurrentCall - The top of the constexpr call stack. 281bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith CallStackFrame *CurrentCall; 282d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 283d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith /// CallStackDepth - The number of calls in the call stack right now. 284d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith unsigned CallStackDepth; 285d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 28647a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith typedef llvm::DenseMap<const OpaqueValueExpr*, CCValue> MapTy; 287bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith /// OpaqueValues - Values used as the common expression in a 288bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith /// BinaryConditionalOperator. 289c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer MapTy OpaqueValues; 290bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith 291bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith /// BottomFrame - The frame in which evaluation started. This must be 292bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith /// initialized last. 293bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith CallStackFrame BottomFrame; 294bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith 295180f47959a066795cc0f409433023af448bb0328Richard Smith /// EvaluatingDecl - This is the declaration whose initializer is being 296180f47959a066795cc0f409433023af448bb0328Richard Smith /// evaluated, if any. 297180f47959a066795cc0f409433023af448bb0328Richard Smith const VarDecl *EvaluatingDecl; 298180f47959a066795cc0f409433023af448bb0328Richard Smith 299180f47959a066795cc0f409433023af448bb0328Richard Smith /// EvaluatingDeclValue - This is the value being constructed for the 300180f47959a066795cc0f409433023af448bb0328Richard Smith /// declaration whose initializer is being evaluated, if any. 301180f47959a066795cc0f409433023af448bb0328Richard Smith APValue *EvaluatingDeclValue; 302180f47959a066795cc0f409433023af448bb0328Richard Smith 303c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith /// HasActiveDiagnostic - Was the previous diagnostic stored? If so, further 304c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith /// notes attached to it will also be stored, otherwise they will not be. 305c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith bool HasActiveDiagnostic; 306c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith 307bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith 308bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith EvalInfo(const ASTContext &C, Expr::EvalStatus &S) 309dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith : Ctx(const_cast<ASTContext&>(C)), EvalStatus(S), CurrentCall(0), 31008d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith CallStackDepth(0), BottomFrame(*this, SourceLocation(), 0, 0, 0), 31108d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith EvaluatingDecl(0), EvaluatingDeclValue(0), HasActiveDiagnostic(false) {} 312bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith 31347a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith const CCValue *getOpaqueValue(const OpaqueValueExpr *e) const { 314c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer MapTy::const_iterator i = OpaqueValues.find(e); 315c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer if (i == OpaqueValues.end()) return 0; 316c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer return &i->second; 317c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer } 31856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 319180f47959a066795cc0f409433023af448bb0328Richard Smith void setEvaluatingDecl(const VarDecl *VD, APValue &Value) { 320180f47959a066795cc0f409433023af448bb0328Richard Smith EvaluatingDecl = VD; 321180f47959a066795cc0f409433023af448bb0328Richard Smith EvaluatingDeclValue = &Value; 322180f47959a066795cc0f409433023af448bb0328Richard Smith } 323180f47959a066795cc0f409433023af448bb0328Richard Smith 324c18c42345636e2866fed75c7e434fb659d747672Richard Smith const LangOptions &getLangOpts() const { return Ctx.getLangOptions(); } 325c18c42345636e2866fed75c7e434fb659d747672Richard Smith 326c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith bool CheckCallLimit(SourceLocation Loc) { 327c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (CallStackDepth <= getLangOpts().ConstexprCallDepth) 328c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return true; 329c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Diag(Loc, diag::note_constexpr_depth_limit_exceeded) 330c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith << getLangOpts().ConstexprCallDepth; 331c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return false; 332c18c42345636e2866fed75c7e434fb659d747672Richard Smith } 333f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 334c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith private: 335c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith /// Add a diagnostic to the diagnostics list. 336c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith PartialDiagnostic &addDiag(SourceLocation Loc, diag::kind DiagId) { 337c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith PartialDiagnostic PD(DiagId, Ctx.getDiagAllocator()); 338c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith EvalStatus.Diag->push_back(std::make_pair(Loc, PD)); 339c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return EvalStatus.Diag->back().second; 340c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith } 341c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith 34208d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith /// Add notes containing a call stack to the current point of evaluation. 34308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith void addCallStack(unsigned Limit); 34408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 345c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith public: 346f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith /// Diagnose that the evaluation cannot be folded. 347c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith OptionalDiagnostic Diag(SourceLocation Loc, diag::kind DiagId, 348c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith unsigned ExtraNotes = 0) { 349f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // If we have a prior diagnostic, it will be noting that the expression 350f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // isn't a constant expression. This diagnostic is more important. 351f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // FIXME: We might want to show both diagnostics to the user. 352dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith if (EvalStatus.Diag) { 35308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith unsigned CallStackNotes = CallStackDepth - 1; 35408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith unsigned Limit = Ctx.getDiagnostics().getConstexprBacktraceLimit(); 35508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith if (Limit) 35608d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith CallStackNotes = std::min(CallStackNotes, Limit + 1); 35708d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 358c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith HasActiveDiagnostic = true; 359dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith EvalStatus.Diag->clear(); 36008d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith EvalStatus.Diag->reserve(1 + ExtraNotes + CallStackNotes); 36108d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith addDiag(Loc, DiagId); 36208d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith addCallStack(Limit); 36308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith return OptionalDiagnostic(&(*EvalStatus.Diag)[0].second); 364dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith } 365c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith HasActiveDiagnostic = false; 366dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith return OptionalDiagnostic(); 367dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith } 368dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith 369dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith /// Diagnose that the evaluation does not produce a C++11 core constant 370dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith /// expression. 371c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith OptionalDiagnostic CCEDiag(SourceLocation Loc, diag::kind DiagId, 372c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith unsigned ExtraNotes = 0) { 373dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith // Don't override a previous diagnostic. 374dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith if (!EvalStatus.Diag || !EvalStatus.Diag->empty()) 375dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith return OptionalDiagnostic(); 376c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return Diag(Loc, DiagId, ExtraNotes); 377c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith } 378c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith 379c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith /// Add a note to a prior diagnostic. 380c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith OptionalDiagnostic Note(SourceLocation Loc, diag::kind DiagId) { 381c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (!HasActiveDiagnostic) 382c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return OptionalDiagnostic(); 383c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return OptionalDiagnostic(&addDiag(Loc, DiagId)); 384f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 385099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith 386099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith /// Add a stack of notes to a prior diagnostic. 387099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith void addNotes(ArrayRef<PartialDiagnosticAt> Diags) { 388099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith if (HasActiveDiagnostic) { 389099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith EvalStatus.Diag->insert(EvalStatus.Diag->end(), 390099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Diags.begin(), Diags.end()); 391099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith } 392099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith } 393c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer }; 39408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith} 39508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 39608d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard SmithCallStackFrame::CallStackFrame(EvalInfo &Info, SourceLocation CallLoc, 39708d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith const FunctionDecl *Callee, const LValue *This, 39808d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith const CCValue *Arguments) 39908d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith : Info(Info), Caller(Info.CurrentCall), CallLoc(CallLoc), Callee(Callee), 40008d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith This(This), Arguments(Arguments) { 40108d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith Info.CurrentCall = this; 40208d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith ++Info.CallStackDepth; 40308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith} 40408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 40508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard SmithCallStackFrame::~CallStackFrame() { 40608d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith assert(Info.CurrentCall == this && "calls retired out of order"); 40708d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith --Info.CallStackDepth; 40808d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith Info.CurrentCall = Caller; 40908d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith} 41087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 41108d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith/// Produce a string describing the given constexpr call. 41208d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smithstatic void describeCall(CallStackFrame *Frame, llvm::raw_ostream &Out) { 41308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith unsigned ArgIndex = 0; 41408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith bool IsMemberCall = isa<CXXMethodDecl>(Frame->Callee) && 41508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith !isa<CXXConstructorDecl>(Frame->Callee); 41608d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 41708d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith if (!IsMemberCall) 41808d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith Out << *Frame->Callee << '('; 41908d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 42008d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith for (FunctionDecl::param_const_iterator I = Frame->Callee->param_begin(), 42108d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith E = Frame->Callee->param_end(); I != E; ++I, ++ArgIndex) { 42208d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith if (ArgIndex > IsMemberCall) 42308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith Out << ", "; 42408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 42508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith const ParmVarDecl *Param = *I; 42608d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith const CCValue &Arg = Frame->Arguments[ArgIndex]; 42708d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith if (!Arg.isLValue() || Arg.getLValueDesignator().Invalid) 42808d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith Arg.printPretty(Out, Frame->Info.Ctx, Param->getType()); 42908d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith else { 43008d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith // Deliberately slice off the frame to form an APValue we can print. 43108d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith APValue Value(Arg.getLValueBase(), Arg.getLValueOffset(), 43208d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith Arg.getLValueDesignator().Entries, 43308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith Arg.getLValueDesignator().OnePastTheEnd); 43408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith Value.printPretty(Out, Frame->Info.Ctx, Param->getType()); 43508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith } 43608d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 43708d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith if (ArgIndex == 0 && IsMemberCall) 43808d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith Out << "->" << *Frame->Callee << '('; 439bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith } 440d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 44108d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith Out << ')'; 44208d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith} 44308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 44408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smithvoid EvalInfo::addCallStack(unsigned Limit) { 44508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith // Determine which calls to skip, if any. 44608d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith unsigned ActiveCalls = CallStackDepth - 1; 44708d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith unsigned SkipStart = ActiveCalls, SkipEnd = SkipStart; 44808d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith if (Limit && Limit < ActiveCalls) { 44908d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith SkipStart = Limit / 2 + Limit % 2; 45008d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith SkipEnd = ActiveCalls - Limit / 2; 45108d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith } 45208d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 45308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith // Walk the call stack and add the diagnostics. 45408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith unsigned CallIdx = 0; 45508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith for (CallStackFrame *Frame = CurrentCall; Frame != &BottomFrame; 45608d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith Frame = Frame->Caller, ++CallIdx) { 45708d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith // Skip this call? 45808d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith if (CallIdx >= SkipStart && CallIdx < SkipEnd) { 45908d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith if (CallIdx == SkipStart) { 46008d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith // Note that we're skipping calls. 46108d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith addDiag(Frame->CallLoc, diag::note_constexpr_calls_suppressed) 46208d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith << unsigned(ActiveCalls - Limit); 46308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith } 46408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith continue; 46508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith } 46608d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith 46708d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith llvm::SmallVector<char, 128> Buffer; 46808d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith llvm::raw_svector_ostream Out(Buffer); 46908d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith describeCall(Frame, Out); 47008d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith addDiag(Frame->CallLoc, diag::note_constexpr_call_here) << Out.str(); 471bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith } 47208d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith} 473d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 47408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smithnamespace { 475f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall struct ComplexValue { 476f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall private: 477f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool IsInt; 478f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 479f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall public: 480f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt IntReal, IntImag; 481f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat FloatReal, FloatImag; 482f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 483f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue() : FloatReal(APFloat::Bogus), FloatImag(APFloat::Bogus) {} 484f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 485f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall void makeComplexFloat() { IsInt = false; } 486f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool isComplexFloat() const { return !IsInt; } 487f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat &getComplexFloatReal() { return FloatReal; } 488f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat &getComplexFloatImag() { return FloatImag; } 489f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 490f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall void makeComplexInt() { IsInt = true; } 491f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool isComplexInt() const { return IsInt; } 492f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt &getComplexIntReal() { return IntReal; } 493f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt &getComplexIntImag() { return IntImag; } 494f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 49547a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith void moveInto(CCValue &v) const { 496f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (isComplexFloat()) 49747a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith v = CCValue(FloatReal, FloatImag); 498f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall else 49947a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith v = CCValue(IntReal, IntImag); 500f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall } 50147a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith void setFrom(const CCValue &v) { 50256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall assert(v.isComplexFloat() || v.isComplexInt()); 50356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (v.isComplexFloat()) { 50456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall makeComplexFloat(); 50556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall FloatReal = v.getComplexFloatReal(); 50656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall FloatImag = v.getComplexFloatImag(); 50756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } else { 50856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall makeComplexInt(); 50956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall IntReal = v.getComplexIntReal(); 51056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall IntImag = v.getComplexIntImag(); 51156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 51256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 513f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall }; 514efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 515efdb83e26f9a1fd2566afe54461216cd84814d42John McCall struct LValue { 5161bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith APValue::LValueBase Base; 517efdb83e26f9a1fd2566afe54461216cd84814d42John McCall CharUnits Offset; 518177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith CallStackFrame *Frame; 5190a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith SubobjectDesignator Designator; 520efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 5211bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith const APValue::LValueBase getLValueBase() const { return Base; } 52247a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CharUnits &getLValueOffset() { return Offset; } 523625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith const CharUnits &getLValueOffset() const { return Offset; } 524177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith CallStackFrame *getLValueFrame() const { return Frame; } 5250a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith SubobjectDesignator &getLValueDesignator() { return Designator; } 5260a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith const SubobjectDesignator &getLValueDesignator() const { return Designator;} 527efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 52847a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith void moveInto(CCValue &V) const { 5290a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith V = CCValue(Base, Offset, Frame, Designator); 530efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 53147a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith void setFrom(const CCValue &V) { 53247a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith assert(V.isLValue()); 53347a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith Base = V.getLValueBase(); 53447a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith Offset = V.getLValueOffset(); 535177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith Frame = V.getLValueFrame(); 5360a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Designator = V.getLValueDesignator(); 5370a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 5380a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith 5391bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith void set(APValue::LValueBase B, CallStackFrame *F = 0) { 5401bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith Base = B; 5410a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Offset = CharUnits::Zero(); 5420a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Frame = F; 5430a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Designator = SubobjectDesignator(); 54456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 545efdb83e26f9a1fd2566afe54461216cd84814d42John McCall }; 546e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 547e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith struct MemberPtr { 548e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MemberPtr() {} 549e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith explicit MemberPtr(const ValueDecl *Decl) : 550e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith DeclAndIsDerivedMember(Decl, false), Path() {} 551e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 552e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// The member or (direct or indirect) field referred to by this member 553e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// pointer, or 0 if this is a null member pointer. 554e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const ValueDecl *getDecl() const { 555e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return DeclAndIsDerivedMember.getPointer(); 556e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 557e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// Is this actually a member of some type derived from the relevant class? 558e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool isDerivedMember() const { 559e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return DeclAndIsDerivedMember.getInt(); 560e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 561e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// Get the class which the declaration actually lives in. 562e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *getContainingRecord() const { 563e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return cast<CXXRecordDecl>( 564e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith DeclAndIsDerivedMember.getPointer()->getDeclContext()); 565e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 566e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 567e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith void moveInto(CCValue &V) const { 568e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith V = CCValue(getDecl(), isDerivedMember(), Path); 569e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 570e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith void setFrom(const CCValue &V) { 571e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith assert(V.isMemberPointer()); 572e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith DeclAndIsDerivedMember.setPointer(V.getMemberPointerDecl()); 573e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith DeclAndIsDerivedMember.setInt(V.isMemberPointerToDerivedMember()); 574e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Path.clear(); 575e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith ArrayRef<const CXXRecordDecl*> P = V.getMemberPointerPath(); 576e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Path.insert(Path.end(), P.begin(), P.end()); 577e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 578e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 579e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// DeclAndIsDerivedMember - The member declaration, and a flag indicating 580e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// whether the member is a member of some class derived from the class type 581e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// of the member pointer. 582e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith llvm::PointerIntPair<const ValueDecl*, 1, bool> DeclAndIsDerivedMember; 583e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// Path - The path of base/derived classes from the member declaration's 584e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// class (exclusive) to the class type of the member pointer (inclusive). 585e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith SmallVector<const CXXRecordDecl*, 4> Path; 586e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 587e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// Perform a cast towards the class of the Decl (either up or down the 588e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// hierarchy). 589e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool castBack(const CXXRecordDecl *Class) { 590e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith assert(!Path.empty()); 591e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *Expected; 592e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (Path.size() >= 2) 593e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Expected = Path[Path.size() - 2]; 594e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith else 595e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Expected = getContainingRecord(); 596e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (Expected->getCanonicalDecl() != Class->getCanonicalDecl()) { 597e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // C++11 [expr.static.cast]p12: In a conversion from (D::*) to (B::*), 598e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // if B does not contain the original member and is not a base or 599e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // derived class of the class containing the original member, the result 600e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // of the cast is undefined. 601e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // C++11 [conv.mem]p2 does not cover this case for a cast from (B::*) to 602e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // (D::*). We consider that to be a language defect. 603e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 604e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 605e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Path.pop_back(); 606e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 607e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 608e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// Perform a base-to-derived member pointer cast. 609e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool castToDerived(const CXXRecordDecl *Derived) { 610e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!getDecl()) 611e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 612e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!isDerivedMember()) { 613e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Path.push_back(Derived); 614e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 615e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 616e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!castBack(Derived)) 617e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 618e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (Path.empty()) 619e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith DeclAndIsDerivedMember.setInt(false); 620e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 621e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 622e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// Perform a derived-to-base member pointer cast. 623e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool castToBase(const CXXRecordDecl *Base) { 624e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!getDecl()) 625e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 626e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (Path.empty()) 627e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith DeclAndIsDerivedMember.setInt(true); 628e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (isDerivedMember()) { 629e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Path.push_back(Base); 630e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 631e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 632e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return castBack(Base); 633e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 634e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith }; 635c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith 636c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith /// Kinds of constant expression checking, for diagnostics. 637c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith enum CheckConstantExpressionKind { 638c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CCEK_Constant, ///< A normal constant. 639c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CCEK_ReturnValue, ///< A constexpr function return value. 640c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CCEK_MemberInit ///< A constexpr constructor mem-initializer. 641c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith }; 642f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall} 64387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 64447a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smithstatic bool Evaluate(CCValue &Result, EvalInfo &Info, const Expr *E); 64569c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smithstatic bool EvaluateConstantExpression(APValue &Result, EvalInfo &Info, 646c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const LValue &This, const Expr *E, 647c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CheckConstantExpressionKind CCEK 648c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith = CCEK_Constant); 649efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluateLValue(const Expr *E, LValue &Result, EvalInfo &Info); 650efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluatePointer(const Expr *E, LValue &Result, EvalInfo &Info); 651e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithstatic bool EvaluateMemberPointer(const Expr *E, MemberPtr &Result, 652e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith EvalInfo &Info); 653e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithstatic bool EvaluateTemporary(const Expr *E, LValue &Result, EvalInfo &Info); 65487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluateInteger(const Expr *E, APSInt &Result, EvalInfo &Info); 65547a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smithstatic bool EvaluateIntegerOrLValue(const Expr *E, CCValue &Result, 656d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner EvalInfo &Info); 657d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr *E, APFloat &Result, EvalInfo &Info); 658f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallstatic bool EvaluateComplex(const Expr *E, ComplexValue &Res, EvalInfo &Info); 659f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 660f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 6614efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// Misc utilities 6624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 6634efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 664180f47959a066795cc0f409433023af448bb0328Richard Smith/// Should this call expression be treated as a string literal? 665180f47959a066795cc0f409433023af448bb0328Richard Smithstatic bool IsStringLiteralCall(const CallExpr *E) { 666180f47959a066795cc0f409433023af448bb0328Richard Smith unsigned Builtin = E->isBuiltinCall(); 667180f47959a066795cc0f409433023af448bb0328Richard Smith return (Builtin == Builtin::BI__builtin___CFStringMakeConstantString || 668180f47959a066795cc0f409433023af448bb0328Richard Smith Builtin == Builtin::BI__builtin___NSStringMakeConstantString); 669180f47959a066795cc0f409433023af448bb0328Richard Smith} 670180f47959a066795cc0f409433023af448bb0328Richard Smith 6711bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smithstatic bool IsGlobalLValue(APValue::LValueBase B) { 672180f47959a066795cc0f409433023af448bb0328Richard Smith // C++11 [expr.const]p3 An address constant expression is a prvalue core 673180f47959a066795cc0f409433023af448bb0328Richard Smith // constant expression of pointer type that evaluates to... 674180f47959a066795cc0f409433023af448bb0328Richard Smith 675180f47959a066795cc0f409433023af448bb0328Richard Smith // ... a null pointer value, or a prvalue core constant expression of type 676180f47959a066795cc0f409433023af448bb0328Richard Smith // std::nullptr_t. 6771bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (!B) return true; 67842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 6791bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (const ValueDecl *D = B.dyn_cast<const ValueDecl*>()) { 680180f47959a066795cc0f409433023af448bb0328Richard Smith // ... the address of an object with static storage duration, 6811bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 68242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return VD->hasGlobalStorage(); 6831bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith // ... the address of a function, 6841bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith return isa<FunctionDecl>(D); 68542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } 6861bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith 6871bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith const Expr *E = B.get<const Expr*>(); 6881bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith switch (E->getStmtClass()) { 6891bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith default: 6901bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith return false; 691180f47959a066795cc0f409433023af448bb0328Richard Smith case Expr::CompoundLiteralExprClass: 692180f47959a066795cc0f409433023af448bb0328Richard Smith return cast<CompoundLiteralExpr>(E)->isFileScope(); 693180f47959a066795cc0f409433023af448bb0328Richard Smith // A string literal has static storage duration. 694180f47959a066795cc0f409433023af448bb0328Richard Smith case Expr::StringLiteralClass: 695180f47959a066795cc0f409433023af448bb0328Richard Smith case Expr::PredefinedExprClass: 696180f47959a066795cc0f409433023af448bb0328Richard Smith case Expr::ObjCStringLiteralClass: 697180f47959a066795cc0f409433023af448bb0328Richard Smith case Expr::ObjCEncodeExprClass: 698180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 699180f47959a066795cc0f409433023af448bb0328Richard Smith case Expr::CallExprClass: 700180f47959a066795cc0f409433023af448bb0328Richard Smith return IsStringLiteralCall(cast<CallExpr>(E)); 701180f47959a066795cc0f409433023af448bb0328Richard Smith // For GCC compatibility, &&label has static storage duration. 702180f47959a066795cc0f409433023af448bb0328Richard Smith case Expr::AddrLabelExprClass: 703180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 704180f47959a066795cc0f409433023af448bb0328Richard Smith // A Block literal expression may be used as the initialization value for 705180f47959a066795cc0f409433023af448bb0328Richard Smith // Block variables at global or local static scope. 706180f47959a066795cc0f409433023af448bb0328Richard Smith case Expr::BlockExprClass: 707180f47959a066795cc0f409433023af448bb0328Richard Smith return !cast<BlockExpr>(E)->getBlockDecl()->hasCaptures(); 708180f47959a066795cc0f409433023af448bb0328Richard Smith } 70942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 71042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 7119a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith/// Check that this reference or pointer core constant expression is a valid 7129a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith/// value for a constant expression. Type T should be either LValue or CCValue. 7139a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smithtemplate<typename T> 714f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithstatic bool CheckLValueConstantExpression(EvalInfo &Info, const Expr *E, 715c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const T &LVal, APValue &Value, 716c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CheckConstantExpressionKind CCEK) { 717c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith APValue::LValueBase Base = LVal.getLValueBase(); 718c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const SubobjectDesignator &Designator = LVal.getLValueDesignator(); 719c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith 720c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (!IsGlobalLValue(Base)) { 721c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (Info.getLangOpts().CPlusPlus0x) { 722c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>(); 723c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Diag(E->getExprLoc(), diag::note_constexpr_non_global, 1) 724c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith << E->isGLValue() << !Designator.Entries.empty() 725c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith << !!VD << CCEK << VD; 726c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (VD) 727c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Note(VD->getLocation(), diag::note_declared_at); 728c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith else 729c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Note(Base.dyn_cast<const Expr*>()->getExprLoc(), 730c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith diag::note_constexpr_temporary_here); 731c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith } else { 732c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Diag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 733c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith } 73469c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith return false; 735f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 73669c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith 7379a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith // A constant expression must refer to an object or be a null pointer. 738e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (Designator.Invalid || 7399a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith (!LVal.getLValueBase() && !Designator.Entries.empty())) { 740c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith // FIXME: This is not a core constant expression. We should have already 741c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith // produced a CCE diagnostic. 7429a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith Value = APValue(LVal.getLValueBase(), LVal.getLValueOffset(), 7439a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith APValue::NoLValuePath()); 7449a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith return true; 7459a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith } 7469a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith 747c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith // Does this refer one past the end of some object? 748c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith // This is technically not an address constant expression nor a reference 749c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith // constant expression, but we allow it for address constant expressions. 750c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (E->isGLValue() && Base && Designator.OnePastTheEnd) { 751c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const ValueDecl *VD = Base.dyn_cast<const ValueDecl*>(); 752c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Diag(E->getExprLoc(), diag::note_constexpr_past_end, 1) 753c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith << !Designator.Entries.empty() << !!VD << VD; 754c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (VD) 755c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Note(VD->getLocation(), diag::note_declared_at); 756c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith else 757c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Note(Base.dyn_cast<const Expr*>()->getExprLoc(), 758c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith diag::note_constexpr_temporary_here); 759c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return false; 760c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith } 761c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith 7629a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith Value = APValue(LVal.getLValueBase(), LVal.getLValueOffset(), 763e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Designator.Entries, Designator.OnePastTheEnd); 76469c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith return true; 76547a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith} 76647a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith 7679a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith/// Check that this core constant expression value is a valid value for a 7689a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith/// constant expression, and if it is, produce the corresponding constant value. 769f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith/// If not, report an appropriate diagnostic. 770f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithstatic bool CheckConstantExpression(EvalInfo &Info, const Expr *E, 771c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const CCValue &CCValue, APValue &Value, 772c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CheckConstantExpressionKind CCEK 773c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith = CCEK_Constant) { 7749a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith if (!CCValue.isLValue()) { 7759a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith Value = CCValue; 7769a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith return true; 7779a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith } 778c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return CheckLValueConstantExpression(Info, E, CCValue, Value, CCEK); 7799a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith} 7809a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith 7819e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smithconst ValueDecl *GetLValueBaseDecl(const LValue &LVal) { 7821bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith return LVal.Base.dyn_cast<const ValueDecl*>(); 7839e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith} 7849e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith 7859e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smithstatic bool IsLiteralLValue(const LValue &Value) { 7861bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith return Value.Base.dyn_cast<const Expr*>() && !Value.Frame; 7879e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith} 7889e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith 78965ac598c7ba7e36f2ad611f2bb39cc957053be5dRichard Smithstatic bool IsWeakLValue(const LValue &Value) { 79065ac598c7ba7e36f2ad611f2bb39cc957053be5dRichard Smith const ValueDecl *Decl = GetLValueBaseDecl(Value); 7910dd7a25e8d679de1dc0ce788222d6dee0e879885Lang Hames return Decl && Decl->isWeak(); 79265ac598c7ba7e36f2ad611f2bb39cc957053be5dRichard Smith} 79365ac598c7ba7e36f2ad611f2bb39cc957053be5dRichard Smith 794e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithstatic bool EvalPointerValueAsBool(const CCValue &Value, bool &Result) { 7953554283157190e67918fad4221a5e6faf9317362John McCall // A null base expression indicates a null pointer. These are always 7963554283157190e67918fad4221a5e6faf9317362John McCall // evaluatable, and they are false unless the offset is zero. 797e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!Value.getLValueBase()) { 798e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result = !Value.getLValueOffset().isZero(); 7993554283157190e67918fad4221a5e6faf9317362John McCall return true; 8003554283157190e67918fad4221a5e6faf9317362John McCall } 8013554283157190e67918fad4221a5e6faf9317362John McCall 80242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // Require the base expression to be a global l-value. 80347a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith // FIXME: C++11 requires such conversions. Remove this check. 804e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!IsGlobalLValue(Value.getLValueBase())) return false; 80542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 806e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // We have a non-null base. These are generally known to be true, but if it's 807e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // a weak declaration it can be null at runtime. 8083554283157190e67918fad4221a5e6faf9317362John McCall Result = true; 809e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const ValueDecl *Decl = Value.getLValueBase().dyn_cast<const ValueDecl*>(); 8100dd7a25e8d679de1dc0ce788222d6dee0e879885Lang Hames return !Decl || !Decl->isWeak(); 8115bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman} 8125bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman 81347a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smithstatic bool HandleConversionToBool(const CCValue &Val, bool &Result) { 814c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith switch (Val.getKind()) { 815c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case APValue::Uninitialized: 816c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return false; 817c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case APValue::Int: 818c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith Result = Val.getInt().getBoolValue(); 81941bf4f38348561a0f12c10d34f1673cd19a6eb04Richard Smith return true; 820c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case APValue::Float: 821c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith Result = !Val.getFloat().isZero(); 822a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return true; 823c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case APValue::ComplexInt: 824c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith Result = Val.getComplexIntReal().getBoolValue() || 825c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith Val.getComplexIntImag().getBoolValue(); 826c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return true; 827c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case APValue::ComplexFloat: 828c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith Result = !Val.getComplexFloatReal().isZero() || 829c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith !Val.getComplexFloatImag().isZero(); 830436c8898cd1c93c5bacd3fcc4ac586bc5cd77062Richard Smith return true; 831e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case APValue::LValue: 832e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return EvalPointerValueAsBool(Val, Result); 833e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case APValue::MemberPointer: 834e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result = Val.getMemberPointerDecl(); 835e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 836c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case APValue::Vector: 837cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith case APValue::Array: 838180f47959a066795cc0f409433023af448bb0328Richard Smith case APValue::Struct: 839180f47959a066795cc0f409433023af448bb0328Richard Smith case APValue::Union: 840c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return false; 8414efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 8424efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 843c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith llvm_unreachable("unknown APValue kind"); 844c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith} 845c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 846c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smithstatic bool EvaluateAsBooleanCondition(const Expr *E, bool &Result, 847c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith EvalInfo &Info) { 848c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith assert(E->isRValue() && "missing lvalue-to-rvalue conv in bool condition"); 84947a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue Val; 850c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (!Evaluate(Val, Info, E)) 851c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return false; 852c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return HandleConversionToBool(Val, Result); 8534efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 8544efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 855c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smithtemplate<typename T> 856c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smithstatic bool HandleOverflow(EvalInfo &Info, const Expr *E, 857c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const T &SrcValue, QualType DestType) { 858c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith llvm::SmallVector<char, 32> Buffer; 859c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith SrcValue.toString(Buffer); 860c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Diag(E->getExprLoc(), diag::note_constexpr_overflow) 861c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith << StringRef(Buffer.data(), Buffer.size()) << DestType; 862c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return false; 863c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith} 864c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith 865c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smithstatic bool HandleFloatToIntCast(EvalInfo &Info, const Expr *E, 866c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith QualType SrcType, const APFloat &Value, 867c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith QualType DestType, APSInt &Result) { 868c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith unsigned DestWidth = Info.Ctx.getIntWidth(DestType); 869a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Determine whether we are converting to unsigned or signed. 870575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor bool DestSigned = DestType->isSignedIntegerOrEnumerationType(); 8711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 872c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Result = APSInt(DestWidth, !DestSigned); 873a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 874c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (Value.convertToInteger(Result, llvm::APFloat::rmTowardZero, &ignored) 875c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith & APFloat::opInvalidOp) 876c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return HandleOverflow(Info, E, Value, DestType); 877c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return true; 878a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 879a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 880c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smithstatic bool HandleFloatToFloatCast(EvalInfo &Info, const Expr *E, 881c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith QualType SrcType, QualType DestType, 882c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith APFloat &Result) { 883c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith APFloat Value = Result; 884a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 885c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (Result.convert(Info.Ctx.getFloatTypeSemantics(DestType), 886c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith APFloat::rmNearestTiesToEven, &ignored) 887c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith & APFloat::opOverflow) 888c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return HandleOverflow(Info, E, Value, DestType); 889c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return true; 890a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 891a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 8921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleIntToIntCast(QualType DestType, QualType SrcType, 8934ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad APSInt &Value, const ASTContext &Ctx) { 894a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 895a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt Result = Value; 896a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Figure out if this is a truncate, extend or noop cast. 897a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // If the input is signed, do a sign extend, noop, or truncate. 8989f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Result = Result.extOrTrunc(DestWidth); 899575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor Result.setIsUnsigned(DestType->isUnsignedIntegerOrEnumerationType()); 900a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 901a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 902a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 903c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smithstatic bool HandleIntToFloatCast(EvalInfo &Info, const Expr *E, 904c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith QualType SrcType, const APSInt &Value, 905c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith QualType DestType, APFloat &Result) { 906c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Result = APFloat(Info.Ctx.getFloatTypeSemantics(DestType), 1); 907c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (Result.convertFromAPInt(Value, Value.isSigned(), 908c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith APFloat::rmNearestTiesToEven) 909c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith & APFloat::opOverflow) 910c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return HandleOverflow(Info, E, Value, DestType); 911c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return true; 912a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 913a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 914e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithstatic bool FindMostDerivedObject(EvalInfo &Info, const LValue &LVal, 915e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *&MostDerivedType, 916e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith unsigned &MostDerivedPathLength, 917e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool &MostDerivedIsArrayElement) { 918e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const SubobjectDesignator &D = LVal.Designator; 919e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (D.Invalid || !LVal.Base) 920180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 921180f47959a066795cc0f409433023af448bb0328Richard Smith 922e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const Type *T = getType(LVal.Base).getTypePtr(); 923180f47959a066795cc0f409433023af448bb0328Richard Smith 924180f47959a066795cc0f409433023af448bb0328Richard Smith // Find path prefix which leads to the most-derived subobject. 925180f47959a066795cc0f409433023af448bb0328Richard Smith MostDerivedType = T->getAsCXXRecordDecl(); 926e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MostDerivedPathLength = 0; 927e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MostDerivedIsArrayElement = false; 928180f47959a066795cc0f409433023af448bb0328Richard Smith 929180f47959a066795cc0f409433023af448bb0328Richard Smith for (unsigned I = 0, N = D.Entries.size(); I != N; ++I) { 930180f47959a066795cc0f409433023af448bb0328Richard Smith bool IsArray = T && T->isArrayType(); 931180f47959a066795cc0f409433023af448bb0328Richard Smith if (IsArray) 932180f47959a066795cc0f409433023af448bb0328Richard Smith T = T->getBaseElementTypeUnsafe(); 933180f47959a066795cc0f409433023af448bb0328Richard Smith else if (const FieldDecl *FD = getAsField(D.Entries[I])) 934180f47959a066795cc0f409433023af448bb0328Richard Smith T = FD->getType().getTypePtr(); 935180f47959a066795cc0f409433023af448bb0328Richard Smith else 936180f47959a066795cc0f409433023af448bb0328Richard Smith T = 0; 937180f47959a066795cc0f409433023af448bb0328Richard Smith 938180f47959a066795cc0f409433023af448bb0328Richard Smith if (T) { 939180f47959a066795cc0f409433023af448bb0328Richard Smith MostDerivedType = T->getAsCXXRecordDecl(); 940180f47959a066795cc0f409433023af448bb0328Richard Smith MostDerivedPathLength = I + 1; 941180f47959a066795cc0f409433023af448bb0328Richard Smith MostDerivedIsArrayElement = IsArray; 942180f47959a066795cc0f409433023af448bb0328Richard Smith } 943180f47959a066795cc0f409433023af448bb0328Richard Smith } 944180f47959a066795cc0f409433023af448bb0328Richard Smith 945180f47959a066795cc0f409433023af448bb0328Richard Smith // (B*)&d + 1 has no most-derived object. 946180f47959a066795cc0f409433023af448bb0328Richard Smith if (D.OnePastTheEnd && MostDerivedPathLength != D.Entries.size()) 947180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 948180f47959a066795cc0f409433023af448bb0328Richard Smith 949e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return MostDerivedType != 0; 950e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} 951e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 952e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithstatic void TruncateLValueBasePath(EvalInfo &Info, LValue &Result, 953e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const RecordDecl *TruncatedType, 954e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith unsigned TruncatedElements, 955e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool IsArrayElement) { 956e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith SubobjectDesignator &D = Result.Designator; 957e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const RecordDecl *RD = TruncatedType; 958e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith for (unsigned I = TruncatedElements, N = D.Entries.size(); I != N; ++I) { 959180f47959a066795cc0f409433023af448bb0328Richard Smith const ASTRecordLayout &Layout = Info.Ctx.getASTRecordLayout(RD); 960180f47959a066795cc0f409433023af448bb0328Richard Smith const CXXRecordDecl *Base = getAsBaseClass(D.Entries[I]); 961e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (isVirtualBaseClass(D.Entries[I])) 962180f47959a066795cc0f409433023af448bb0328Richard Smith Result.Offset -= Layout.getVBaseClassOffset(Base); 963e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith else 964180f47959a066795cc0f409433023af448bb0328Richard Smith Result.Offset -= Layout.getBaseClassOffset(Base); 965180f47959a066795cc0f409433023af448bb0328Richard Smith RD = Base; 966180f47959a066795cc0f409433023af448bb0328Richard Smith } 967e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith D.Entries.resize(TruncatedElements); 968e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith D.ArrayElement = IsArrayElement; 969e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} 970e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 971e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// If the given LValue refers to a base subobject of some object, find the most 972e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// derived object and the corresponding complete record type. This is necessary 973e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// in order to find the offset of a virtual base class. 974e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithstatic bool ExtractMostDerivedObject(EvalInfo &Info, LValue &Result, 975e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *&MostDerivedType) { 976e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith unsigned MostDerivedPathLength; 977e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool MostDerivedIsArrayElement; 978e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!FindMostDerivedObject(Info, Result, MostDerivedType, 979e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MostDerivedPathLength, MostDerivedIsArrayElement)) 980e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 981e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 982e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Remove the trailing base class path entries and their offsets. 983e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith TruncateLValueBasePath(Info, Result, MostDerivedType, MostDerivedPathLength, 984e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MostDerivedIsArrayElement); 985180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 986180f47959a066795cc0f409433023af448bb0328Richard Smith} 987180f47959a066795cc0f409433023af448bb0328Richard Smith 988180f47959a066795cc0f409433023af448bb0328Richard Smithstatic void HandleLValueDirectBase(EvalInfo &Info, LValue &Obj, 989180f47959a066795cc0f409433023af448bb0328Richard Smith const CXXRecordDecl *Derived, 990180f47959a066795cc0f409433023af448bb0328Richard Smith const CXXRecordDecl *Base, 991180f47959a066795cc0f409433023af448bb0328Richard Smith const ASTRecordLayout *RL = 0) { 992180f47959a066795cc0f409433023af448bb0328Richard Smith if (!RL) RL = &Info.Ctx.getASTRecordLayout(Derived); 993180f47959a066795cc0f409433023af448bb0328Richard Smith Obj.getLValueOffset() += RL->getBaseClassOffset(Base); 994180f47959a066795cc0f409433023af448bb0328Richard Smith Obj.Designator.addDecl(Base, /*Virtual*/ false); 995180f47959a066795cc0f409433023af448bb0328Richard Smith} 996180f47959a066795cc0f409433023af448bb0328Richard Smith 997180f47959a066795cc0f409433023af448bb0328Richard Smithstatic bool HandleLValueBase(EvalInfo &Info, LValue &Obj, 998180f47959a066795cc0f409433023af448bb0328Richard Smith const CXXRecordDecl *DerivedDecl, 999180f47959a066795cc0f409433023af448bb0328Richard Smith const CXXBaseSpecifier *Base) { 1000180f47959a066795cc0f409433023af448bb0328Richard Smith const CXXRecordDecl *BaseDecl = Base->getType()->getAsCXXRecordDecl(); 1001180f47959a066795cc0f409433023af448bb0328Richard Smith 1002180f47959a066795cc0f409433023af448bb0328Richard Smith if (!Base->isVirtual()) { 1003180f47959a066795cc0f409433023af448bb0328Richard Smith HandleLValueDirectBase(Info, Obj, DerivedDecl, BaseDecl); 1004180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 1005180f47959a066795cc0f409433023af448bb0328Richard Smith } 1006180f47959a066795cc0f409433023af448bb0328Richard Smith 1007180f47959a066795cc0f409433023af448bb0328Richard Smith // Extract most-derived object and corresponding type. 1008180f47959a066795cc0f409433023af448bb0328Richard Smith if (!ExtractMostDerivedObject(Info, Obj, DerivedDecl)) 1009180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1010180f47959a066795cc0f409433023af448bb0328Richard Smith 1011180f47959a066795cc0f409433023af448bb0328Richard Smith const ASTRecordLayout &Layout = Info.Ctx.getASTRecordLayout(DerivedDecl); 1012180f47959a066795cc0f409433023af448bb0328Richard Smith Obj.getLValueOffset() += Layout.getVBaseClassOffset(BaseDecl); 1013180f47959a066795cc0f409433023af448bb0328Richard Smith Obj.Designator.addDecl(BaseDecl, /*Virtual*/ true); 1014180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 1015180f47959a066795cc0f409433023af448bb0328Richard Smith} 1016180f47959a066795cc0f409433023af448bb0328Richard Smith 1017180f47959a066795cc0f409433023af448bb0328Richard Smith/// Update LVal to refer to the given field, which must be a member of the type 1018180f47959a066795cc0f409433023af448bb0328Richard Smith/// currently described by LVal. 1019180f47959a066795cc0f409433023af448bb0328Richard Smithstatic void HandleLValueMember(EvalInfo &Info, LValue &LVal, 1020180f47959a066795cc0f409433023af448bb0328Richard Smith const FieldDecl *FD, 1021180f47959a066795cc0f409433023af448bb0328Richard Smith const ASTRecordLayout *RL = 0) { 1022180f47959a066795cc0f409433023af448bb0328Richard Smith if (!RL) 1023180f47959a066795cc0f409433023af448bb0328Richard Smith RL = &Info.Ctx.getASTRecordLayout(FD->getParent()); 1024180f47959a066795cc0f409433023af448bb0328Richard Smith 1025180f47959a066795cc0f409433023af448bb0328Richard Smith unsigned I = FD->getFieldIndex(); 1026180f47959a066795cc0f409433023af448bb0328Richard Smith LVal.Offset += Info.Ctx.toCharUnitsFromBits(RL->getFieldOffset(I)); 1027180f47959a066795cc0f409433023af448bb0328Richard Smith LVal.Designator.addDecl(FD); 1028180f47959a066795cc0f409433023af448bb0328Richard Smith} 1029180f47959a066795cc0f409433023af448bb0328Richard Smith 1030180f47959a066795cc0f409433023af448bb0328Richard Smith/// Get the size of the given type in char units. 1031180f47959a066795cc0f409433023af448bb0328Richard Smithstatic bool HandleSizeof(EvalInfo &Info, QualType Type, CharUnits &Size) { 1032180f47959a066795cc0f409433023af448bb0328Richard Smith // sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc 1033180f47959a066795cc0f409433023af448bb0328Richard Smith // extension. 1034180f47959a066795cc0f409433023af448bb0328Richard Smith if (Type->isVoidType() || Type->isFunctionType()) { 1035180f47959a066795cc0f409433023af448bb0328Richard Smith Size = CharUnits::One(); 1036180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 1037180f47959a066795cc0f409433023af448bb0328Richard Smith } 1038180f47959a066795cc0f409433023af448bb0328Richard Smith 1039180f47959a066795cc0f409433023af448bb0328Richard Smith if (!Type->isConstantSizeType()) { 1040180f47959a066795cc0f409433023af448bb0328Richard Smith // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. 1041180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1042180f47959a066795cc0f409433023af448bb0328Richard Smith } 1043180f47959a066795cc0f409433023af448bb0328Richard Smith 1044180f47959a066795cc0f409433023af448bb0328Richard Smith Size = Info.Ctx.getTypeSizeInChars(Type); 1045180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 1046180f47959a066795cc0f409433023af448bb0328Richard Smith} 1047180f47959a066795cc0f409433023af448bb0328Richard Smith 1048180f47959a066795cc0f409433023af448bb0328Richard Smith/// Update a pointer value to model pointer arithmetic. 1049180f47959a066795cc0f409433023af448bb0328Richard Smith/// \param Info - Information about the ongoing evaluation. 1050180f47959a066795cc0f409433023af448bb0328Richard Smith/// \param LVal - The pointer value to be updated. 1051180f47959a066795cc0f409433023af448bb0328Richard Smith/// \param EltTy - The pointee type represented by LVal. 1052180f47959a066795cc0f409433023af448bb0328Richard Smith/// \param Adjustment - The adjustment, in objects of type EltTy, to add. 1053180f47959a066795cc0f409433023af448bb0328Richard Smithstatic bool HandleLValueArrayAdjustment(EvalInfo &Info, LValue &LVal, 1054180f47959a066795cc0f409433023af448bb0328Richard Smith QualType EltTy, int64_t Adjustment) { 1055180f47959a066795cc0f409433023af448bb0328Richard Smith CharUnits SizeOfPointee; 1056180f47959a066795cc0f409433023af448bb0328Richard Smith if (!HandleSizeof(Info, EltTy, SizeOfPointee)) 1057180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1058180f47959a066795cc0f409433023af448bb0328Richard Smith 1059180f47959a066795cc0f409433023af448bb0328Richard Smith // Compute the new offset in the appropriate width. 1060180f47959a066795cc0f409433023af448bb0328Richard Smith LVal.Offset += Adjustment * SizeOfPointee; 1061180f47959a066795cc0f409433023af448bb0328Richard Smith LVal.Designator.adjustIndex(Adjustment); 1062180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 1063180f47959a066795cc0f409433023af448bb0328Richard Smith} 1064180f47959a066795cc0f409433023af448bb0328Richard Smith 106503f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith/// Try to evaluate the initializer for a variable declaration. 1066f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithstatic bool EvaluateVarDeclInit(EvalInfo &Info, const Expr *E, 1067f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith const VarDecl *VD, 1068177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith CallStackFrame *Frame, CCValue &Result) { 1069d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith // If this is a parameter to an active constexpr function call, perform 1070d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith // argument substitution. 1071d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith if (const ParmVarDecl *PVD = dyn_cast<ParmVarDecl>(VD)) { 1072f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!Frame || !Frame->Arguments) { 1073dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 1074177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith return false; 1075f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1076177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith Result = Frame->Arguments[PVD->getFunctionScopeIndex()]; 1077177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith return true; 1078d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith } 107903f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 1080099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith // Dig out the initializer, and use the declaration which it's attached to. 1081099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith const Expr *Init = VD->getAnyInitializer(VD); 1082099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith if (!Init || Init->isValueDependent()) { 1083099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Info.Diag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 1084099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith return false; 1085099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith } 1086099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith 1087180f47959a066795cc0f409433023af448bb0328Richard Smith // If we're currently evaluating the initializer of this declaration, use that 1088180f47959a066795cc0f409433023af448bb0328Richard Smith // in-flight value. 1089180f47959a066795cc0f409433023af448bb0328Richard Smith if (Info.EvaluatingDecl == VD) { 1090180f47959a066795cc0f409433023af448bb0328Richard Smith Result = CCValue(*Info.EvaluatingDeclValue, CCValue::GlobalValue()); 1091180f47959a066795cc0f409433023af448bb0328Richard Smith return !Result.isUninit(); 1092180f47959a066795cc0f409433023af448bb0328Richard Smith } 1093180f47959a066795cc0f409433023af448bb0328Richard Smith 109465ac598c7ba7e36f2ad611f2bb39cc957053be5dRichard Smith // Never evaluate the initializer of a weak variable. We can't be sure that 109565ac598c7ba7e36f2ad611f2bb39cc957053be5dRichard Smith // this is the definition which will be used. 1096f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (VD->isWeak()) { 1097dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 109865ac598c7ba7e36f2ad611f2bb39cc957053be5dRichard Smith return false; 1099f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 110065ac598c7ba7e36f2ad611f2bb39cc957053be5dRichard Smith 1101099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith // Check that we can fold the initializer. In C++, we will have already done 1102099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith // this in the cases where it matters for conformance. 1103099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith llvm::SmallVector<PartialDiagnosticAt, 8> Notes; 1104099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith if (!VD->evaluateValue(Notes)) { 1105099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Info.Diag(E->getExprLoc(), diag::note_constexpr_var_init_non_constant, 1106099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Notes.size() + 1) << VD; 1107099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Info.Note(VD->getLocation(), diag::note_declared_at); 1108099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Info.addNotes(Notes); 110947a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith return false; 1110099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith } else if (!VD->checkInitIsICE()) { 1111099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Info.CCEDiag(E->getExprLoc(), diag::note_constexpr_var_init_non_constant, 1112099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Notes.size() + 1) << VD; 1113099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Info.Note(VD->getLocation(), diag::note_declared_at); 1114099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Info.addNotes(Notes); 1115f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 111603f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 1117099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Result = CCValue(*VD->getEvaluatedValue(), CCValue::GlobalValue()); 111847a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith return true; 111903f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith} 112003f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 1121c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smithstatic bool IsConstNonVolatile(QualType T) { 112203f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith Qualifiers Quals = T.getQualifiers(); 112303f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith return Quals.hasConst() && !Quals.hasVolatile(); 112403f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith} 112503f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 112659efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith/// Get the base index of the given base class within an APValue representing 112759efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith/// the given derived class. 112859efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smithstatic unsigned getBaseIndex(const CXXRecordDecl *Derived, 112959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith const CXXRecordDecl *Base) { 113059efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith Base = Base->getCanonicalDecl(); 113159efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith unsigned Index = 0; 113259efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith for (CXXRecordDecl::base_class_const_iterator I = Derived->bases_begin(), 113359efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith E = Derived->bases_end(); I != E; ++I, ++Index) { 113459efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith if (I->getType()->getAsCXXRecordDecl()->getCanonicalDecl() == Base) 113559efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith return Index; 113659efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith } 113759efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 113859efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith llvm_unreachable("base class missing from derived class's bases list"); 113959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith} 114059efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 1141cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith/// Extract the designated sub-object of an rvalue. 1142f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithstatic bool ExtractSubobject(EvalInfo &Info, const Expr *E, 1143f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith CCValue &Obj, QualType ObjType, 1144cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith const SubobjectDesignator &Sub, QualType SubType) { 1145f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (Sub.Invalid || Sub.OnePastTheEnd) { 1146dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 1147cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith return false; 1148f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1149f64699e8db3946e21b5f4a0421cbc58a3e439599Richard Smith if (Sub.Entries.empty()) 1150cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith return true; 1151cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 1152cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith assert(!Obj.isLValue() && "extracting subobject of lvalue"); 1153cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith const APValue *O = &Obj; 1154180f47959a066795cc0f409433023af448bb0328Richard Smith // Walk the designator's path to find the subobject. 1155cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith for (unsigned I = 0, N = Sub.Entries.size(); I != N; ++I) { 1156cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith if (ObjType->isArrayType()) { 1157180f47959a066795cc0f409433023af448bb0328Richard Smith // Next subobject is an array element. 1158cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith const ConstantArrayType *CAT = Info.Ctx.getAsConstantArrayType(ObjType); 1159f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith assert(CAT && "vla in literal type?"); 1160cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith uint64_t Index = Sub.Entries[I].ArrayIndex; 1161f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (CAT->getSize().ule(Index)) { 1162dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 1163cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith return false; 1164f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1165cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith if (O->getArrayInitializedElts() > Index) 1166cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith O = &O->getArrayInitializedElt(Index); 1167cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith else 1168cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith O = &O->getArrayFiller(); 1169cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith ObjType = CAT->getElementType(); 1170180f47959a066795cc0f409433023af448bb0328Richard Smith } else if (const FieldDecl *Field = getAsField(Sub.Entries[I])) { 1171180f47959a066795cc0f409433023af448bb0328Richard Smith // Next subobject is a class, struct or union field. 1172180f47959a066795cc0f409433023af448bb0328Richard Smith RecordDecl *RD = ObjType->castAs<RecordType>()->getDecl(); 1173180f47959a066795cc0f409433023af448bb0328Richard Smith if (RD->isUnion()) { 1174180f47959a066795cc0f409433023af448bb0328Richard Smith const FieldDecl *UnionField = O->getUnionField(); 1175180f47959a066795cc0f409433023af448bb0328Richard Smith if (!UnionField || 1176f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith UnionField->getCanonicalDecl() != Field->getCanonicalDecl()) { 1177dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 1178180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1179f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1180180f47959a066795cc0f409433023af448bb0328Richard Smith O = &O->getUnionValue(); 1181180f47959a066795cc0f409433023af448bb0328Richard Smith } else 1182180f47959a066795cc0f409433023af448bb0328Richard Smith O = &O->getStructField(Field->getFieldIndex()); 1183180f47959a066795cc0f409433023af448bb0328Richard Smith ObjType = Field->getType(); 1184cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith } else { 1185180f47959a066795cc0f409433023af448bb0328Richard Smith // Next subobject is a base class. 118659efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith const CXXRecordDecl *Derived = ObjType->getAsCXXRecordDecl(); 118759efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith const CXXRecordDecl *Base = getAsBaseClass(Sub.Entries[I]); 118859efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith O = &O->getStructBase(getBaseIndex(Derived, Base)); 118959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith ObjType = Info.Ctx.getRecordType(Base); 1190cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith } 1191180f47959a066795cc0f409433023af448bb0328Richard Smith 1192f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (O->isUninit()) { 1193dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 1194180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1195f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1196cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith } 1197cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 1198cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith Obj = CCValue(*O, CCValue::GlobalValue()); 1199cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith return true; 1200cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith} 1201cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 1202180f47959a066795cc0f409433023af448bb0328Richard Smith/// HandleLValueToRValueConversion - Perform an lvalue-to-rvalue conversion on 1203180f47959a066795cc0f409433023af448bb0328Richard Smith/// the given lvalue. This can also be used for 'lvalue-to-lvalue' conversions 1204180f47959a066795cc0f409433023af448bb0328Richard Smith/// for looking up the glvalue referred to by an entity of reference type. 1205180f47959a066795cc0f409433023af448bb0328Richard Smith/// 1206180f47959a066795cc0f409433023af448bb0328Richard Smith/// \param Info - Information about the ongoing evaluation. 1207f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith/// \param Conv - The expression for which we are performing the conversion. 1208f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith/// Used for diagnostics. 1209180f47959a066795cc0f409433023af448bb0328Richard Smith/// \param Type - The type we expect this conversion to produce. 1210180f47959a066795cc0f409433023af448bb0328Richard Smith/// \param LVal - The glvalue on which we are attempting to perform this action. 1211180f47959a066795cc0f409433023af448bb0328Richard Smith/// \param RVal - The produced value will be placed here. 1212f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithstatic bool HandleLValueToRValueConversion(EvalInfo &Info, const Expr *Conv, 1213f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith QualType Type, 1214cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith const LValue &LVal, CCValue &RVal) { 12151bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith const Expr *Base = LVal.Base.dyn_cast<const Expr*>(); 1216177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith CallStackFrame *Frame = LVal.Frame; 1217c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 1218f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!LVal.Base) { 1219f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // FIXME: Indirection through a null pointer deserves a specific diagnostic. 1220dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(Conv->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 1221c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return false; 1222f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1223c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 12241bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (const ValueDecl *D = LVal.Base.dyn_cast<const ValueDecl*>()) { 1225c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // In C++98, const, non-volatile integers initialized with ICEs are ICEs. 1226c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // In C++11, constexpr, non-volatile variables initialized with constant 1227d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith // expressions are constant expressions too. Inside constexpr functions, 1228d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith // parameters are constant expressions even if they're non-const. 1229c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // In C, such things can also be folded, although they are not ICEs. 1230c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // 1231d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith // FIXME: volatile-qualified ParmVarDecls need special handling. A literal 1232d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith // interpretation of C++11 suggests that volatile parameters are OK if 1233d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith // they're never read (there's no prohibition against constructing volatile 1234d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith // objects in constant expressions), but lvalue-to-rvalue conversions on 1235d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith // them are not permitted. 1236c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith const VarDecl *VD = dyn_cast<VarDecl>(D); 1237f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!VD || VD->isInvalidDecl()) { 1238dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(Conv->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 12390a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return false; 1240f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1241f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 12421bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith QualType VT = VD->getType(); 12430a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (!isa<ParmVarDecl>(VD)) { 1244f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!IsConstNonVolatile(VT)) { 1245dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(Conv->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 12460a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return false; 1247f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1248cd689927139d3ab52c0c088521633c661bd2d807Richard Smith // FIXME: Allow folding of values of any literal type in all languages. 1249cd689927139d3ab52c0c088521633c661bd2d807Richard Smith if (!VT->isIntegralOrEnumerationType() && !VT->isRealFloatingType() && 1250f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith !VD->isConstexpr()) { 1251dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(Conv->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 12520a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return false; 1253f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 12540a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 1255f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!EvaluateVarDeclInit(Info, Conv, VD, Frame, RVal)) 1256c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return false; 1257c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 125847a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith if (isa<ParmVarDecl>(VD) || !VD->getAnyInitializer()->isLValue()) 1259f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return ExtractSubobject(Info, Conv, RVal, VT, LVal.Designator, Type); 1260c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 1261c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // The declaration was initialized by an lvalue, with no lvalue-to-rvalue 1262c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // conversion. This happens when the declaration and the lvalue should be 1263c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // considered synonymous, for instance when initializing an array of char 1264c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // from a string literal. Continue as if the initializer lvalue was the 1265c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // value we were originally given. 12660a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith assert(RVal.getLValueOffset().isZero() && 12670a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith "offset for lvalue init of non-reference"); 12681bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith Base = RVal.getLValueBase().get<const Expr*>(); 1269177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith Frame = RVal.getLValueFrame(); 1270c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith } 1271c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 12720a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith // FIXME: Support PredefinedExpr, ObjCEncodeExpr, MakeStringConstant 12730a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (const StringLiteral *S = dyn_cast<StringLiteral>(Base)) { 12740a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith const SubobjectDesignator &Designator = LVal.Designator; 1275f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (Designator.Invalid || Designator.Entries.size() != 1) { 1276dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(Conv->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 12770a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return false; 1278f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 12790a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith 12800a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith assert(Type->isIntegerType() && "string element not integer type"); 12819a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith uint64_t Index = Designator.Entries[0].ArrayIndex; 1282f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (Index > S->getLength()) { 1283dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(Conv->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 12840a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return false; 1285f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 12860a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith APSInt Value(S->getCharByteWidth() * Info.Ctx.getCharWidth(), 12870a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Type->isUnsignedIntegerType()); 12880a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (Index < S->getLength()) 12890a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Value = S->getCodeUnit(Index); 12900a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith RVal = CCValue(Value); 12910a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return true; 12920a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith } 12930a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith 1294177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith if (Frame) { 1295cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith // If this is a temporary expression with a nontrivial initializer, grab the 1296cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith // value from the relevant stack frame. 1297177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith RVal = Frame->Temporaries[Base]; 1298cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith } else if (const CompoundLiteralExpr *CLE 1299cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith = dyn_cast<CompoundLiteralExpr>(Base)) { 1300cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith // In C99, a CompoundLiteralExpr is an lvalue, and we defer evaluating the 1301cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith // initializer until now for such expressions. Such an expression can't be 1302cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith // an ICE in C, so this only matters for fold. 1303c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith assert(!Info.getLangOpts().CPlusPlus && "lvalue compound literal in c++?"); 1304cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith if (!Evaluate(RVal, Info, CLE->getInitializer())) 1305cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith return false; 1306f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } else { 1307dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(Conv->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 1308cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith return false; 1309f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1310c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 1311f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return ExtractSubobject(Info, Conv, RVal, Base->getType(), LVal.Designator, 1312f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith Type); 1313c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith} 1314c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 131559efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith/// Build an lvalue for the object argument of a member function call. 131659efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smithstatic bool EvaluateObjectArgument(EvalInfo &Info, const Expr *Object, 131759efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith LValue &This) { 131859efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith if (Object->getType()->isPointerType()) 131959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith return EvaluatePointer(Object, This, Info); 132059efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 132159efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith if (Object->isGLValue()) 132259efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith return EvaluateLValue(Object, This, Info); 132359efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 1324e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (Object->getType()->isLiteralType()) 1325e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return EvaluateTemporary(Object, This, Info); 1326e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1327e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 1328e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} 1329e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1330e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// HandleMemberPointerAccess - Evaluate a member access operation and build an 1331e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// lvalue referring to the result. 1332e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// 1333e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// \param Info - Information about the ongoing evaluation. 1334e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// \param BO - The member pointer access operation. 1335e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// \param LV - Filled in with a reference to the resulting object. 1336e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// \param IncludeMember - Specifies whether the member itself is included in 1337e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// the resulting LValue subobject designator. This is not possible when 1338e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// creating a bound member function. 1339e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// \return The field or method declaration to which the member pointer refers, 1340e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// or 0 if evaluation fails. 1341e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithstatic const ValueDecl *HandleMemberPointerAccess(EvalInfo &Info, 1342e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const BinaryOperator *BO, 1343e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LValue &LV, 1344e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool IncludeMember = true) { 1345e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith assert(BO->getOpcode() == BO_PtrMemD || BO->getOpcode() == BO_PtrMemI); 1346e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1347e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!EvaluateObjectArgument(Info, BO->getLHS(), LV)) 1348e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return 0; 1349e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1350e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MemberPtr MemPtr; 1351e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!EvaluateMemberPointer(BO->getRHS(), MemPtr, Info)) 1352e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return 0; 1353e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1354e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // C++11 [expr.mptr.oper]p6: If the second operand is the null pointer to 1355e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // member value, the behavior is undefined. 1356e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!MemPtr.getDecl()) 1357e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return 0; 1358e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1359e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (MemPtr.isDerivedMember()) { 1360e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // This is a member of some derived class. Truncate LV appropriately. 1361e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *MostDerivedType; 1362e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith unsigned MostDerivedPathLength; 1363e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool MostDerivedIsArrayElement; 1364e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!FindMostDerivedObject(Info, LV, MostDerivedType, MostDerivedPathLength, 1365e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MostDerivedIsArrayElement)) 1366e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return 0; 1367e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1368e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // The end of the derived-to-base path for the base object must match the 1369e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // derived-to-base path for the member pointer. 1370e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (MostDerivedPathLength + MemPtr.Path.size() > 1371e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LV.Designator.Entries.size()) 1372e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return 0; 1373e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith unsigned PathLengthToMember = 1374e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LV.Designator.Entries.size() - MemPtr.Path.size(); 1375e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith for (unsigned I = 0, N = MemPtr.Path.size(); I != N; ++I) { 1376e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *LVDecl = getAsBaseClass( 1377e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LV.Designator.Entries[PathLengthToMember + I]); 1378e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *MPDecl = MemPtr.Path[I]; 1379e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (LVDecl->getCanonicalDecl() != MPDecl->getCanonicalDecl()) 1380e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return 0; 1381e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 1382e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1383e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Truncate the lvalue to the appropriate derived class. 1384e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool ResultIsArray = false; 1385e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (PathLengthToMember == MostDerivedPathLength) 1386e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith ResultIsArray = MostDerivedIsArrayElement; 1387e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith TruncateLValueBasePath(Info, LV, MemPtr.getContainingRecord(), 1388e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith PathLengthToMember, ResultIsArray); 1389e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } else if (!MemPtr.Path.empty()) { 1390e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Extend the LValue path with the member pointer's path. 1391e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LV.Designator.Entries.reserve(LV.Designator.Entries.size() + 1392e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MemPtr.Path.size() + IncludeMember); 1393e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1394e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Walk down to the appropriate base class. 1395e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith QualType LVType = BO->getLHS()->getType(); 1396e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (const PointerType *PT = LVType->getAs<PointerType>()) 1397e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LVType = PT->getPointeeType(); 1398e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *RD = LVType->getAsCXXRecordDecl(); 1399e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith assert(RD && "member pointer access on non-class-type expression"); 1400e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // The first class in the path is that of the lvalue. 1401e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith for (unsigned I = 1, N = MemPtr.Path.size(); I != N; ++I) { 1402e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *Base = MemPtr.Path[N - I - 1]; 1403e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith HandleLValueDirectBase(Info, LV, RD, Base); 1404e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith RD = Base; 1405e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 1406e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Finally cast to the class containing the member. 1407e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith HandleLValueDirectBase(Info, LV, RD, MemPtr.getContainingRecord()); 1408e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 1409e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1410e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Add the member. Note that we cannot build bound member functions here. 1411e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (IncludeMember) { 1412e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // FIXME: Deal with IndirectFieldDecls. 1413e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const FieldDecl *FD = dyn_cast<FieldDecl>(MemPtr.getDecl()); 1414e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!FD) return 0; 1415e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith HandleLValueMember(Info, LV, FD); 1416e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 1417e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1418e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return MemPtr.getDecl(); 1419e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} 1420e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1421e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// HandleBaseToDerivedCast - Apply the given base-to-derived cast operation on 1422e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// the provided lvalue, which currently refers to the base object. 1423e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithstatic bool HandleBaseToDerivedCast(EvalInfo &Info, const CastExpr *E, 1424e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LValue &Result) { 1425e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *MostDerivedType; 1426e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith unsigned MostDerivedPathLength; 1427e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool MostDerivedIsArrayElement; 1428e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1429e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Check this cast doesn't take us outside the object. 1430e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!FindMostDerivedObject(Info, Result, MostDerivedType, 1431e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MostDerivedPathLength, 1432e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MostDerivedIsArrayElement)) 1433e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 1434e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith SubobjectDesignator &D = Result.Designator; 1435e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (MostDerivedPathLength + E->path_size() > D.Entries.size()) 1436e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 1437e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1438e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Check the type of the final cast. We don't need to check the path, 1439e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // since a cast can only be formed if the path is unique. 1440e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith unsigned NewEntriesSize = D.Entries.size() - E->path_size(); 1441e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool ResultIsArray = false; 1442e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith QualType TargetQT = E->getType(); 1443e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (const PointerType *PT = TargetQT->getAs<PointerType>()) 1444e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith TargetQT = PT->getPointeeType(); 1445e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *TargetType = TargetQT->getAsCXXRecordDecl(); 1446e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *FinalType; 1447e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (NewEntriesSize == MostDerivedPathLength) { 1448e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith ResultIsArray = MostDerivedIsArrayElement; 1449e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith FinalType = MostDerivedType; 1450e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } else 1451e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith FinalType = getAsBaseClass(D.Entries[NewEntriesSize - 1]); 1452e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (FinalType->getCanonicalDecl() != TargetType->getCanonicalDecl()) 1453e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 1454e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1455e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Truncate the lvalue to the appropriate derived class. 1456e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith TruncateLValueBasePath(Info, Result, TargetType, NewEntriesSize, 1457e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith ResultIsArray); 1458e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 145959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith} 146059efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 1461c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumpnamespace { 1462d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smithenum EvalStmtResult { 1463d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith /// Evaluation failed. 1464d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith ESR_Failed, 1465d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith /// Hit a 'return' statement. 1466d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith ESR_Returned, 1467d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith /// Evaluation succeeded. 1468d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith ESR_Succeeded 1469d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith}; 1470d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith} 1471d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 1472d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith// Evaluate a statement. 1473c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smithstatic EvalStmtResult EvaluateStmt(APValue &Result, EvalInfo &Info, 1474d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith const Stmt *S) { 1475d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith switch (S->getStmtClass()) { 1476d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith default: 1477d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith return ESR_Failed; 1478d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 1479d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith case Stmt::NullStmtClass: 1480d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith case Stmt::DeclStmtClass: 1481d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith return ESR_Succeeded; 1482d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 1483c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith case Stmt::ReturnStmtClass: { 1484c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CCValue CCResult; 1485c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const Expr *RetExpr = cast<ReturnStmt>(S)->getRetValue(); 1486c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (!Evaluate(CCResult, Info, RetExpr) || 1487c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith !CheckConstantExpression(Info, RetExpr, CCResult, Result, 1488c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CCEK_ReturnValue)) 1489c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return ESR_Failed; 1490c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return ESR_Returned; 1491c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith } 1492d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 1493d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith case Stmt::CompoundStmtClass: { 1494d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith const CompoundStmt *CS = cast<CompoundStmt>(S); 1495d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith for (CompoundStmt::const_body_iterator BI = CS->body_begin(), 1496d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith BE = CS->body_end(); BI != BE; ++BI) { 1497d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith EvalStmtResult ESR = EvaluateStmt(Result, Info, *BI); 1498d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith if (ESR != ESR_Succeeded) 1499d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith return ESR; 1500d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith } 1501d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith return ESR_Succeeded; 1502d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith } 1503d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith } 1504d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith} 1505d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 1506c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith/// CheckConstexprFunction - Check that a function can be called in a constant 1507c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith/// expression. 1508c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smithstatic bool CheckConstexprFunction(EvalInfo &Info, SourceLocation CallLoc, 1509c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const FunctionDecl *Declaration, 1510c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const FunctionDecl *Definition) { 1511c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith // Can we evaluate this function call? 1512c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (Definition && Definition->isConstexpr() && !Definition->isInvalidDecl()) 1513c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return true; 1514c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith 1515c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (Info.getLangOpts().CPlusPlus0x) { 1516c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const FunctionDecl *DiagDecl = Definition ? Definition : Declaration; 1517099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith // FIXME: If DiagDecl is an implicitly-declared special member function, we 1518099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith // should be much more explicit about why it's not constexpr. 1519c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Diag(CallLoc, diag::note_constexpr_invalid_function, 1) 1520c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith << DiagDecl->isConstexpr() << isa<CXXConstructorDecl>(DiagDecl) 1521c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith << DiagDecl; 1522c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Note(DiagDecl->getLocation(), diag::note_declared_at); 1523c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith } else { 1524c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Diag(CallLoc, diag::note_invalid_subexpr_in_const_expr); 1525c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith } 1526c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return false; 1527c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith} 1528c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith 1529180f47959a066795cc0f409433023af448bb0328Richard Smithnamespace { 1530cd99b072e8b32075da6233cbf14ea58a5c82de4fRichard Smithtypedef SmallVector<CCValue, 8> ArgVector; 1531180f47959a066795cc0f409433023af448bb0328Richard Smith} 1532180f47959a066795cc0f409433023af448bb0328Richard Smith 1533180f47959a066795cc0f409433023af448bb0328Richard Smith/// EvaluateArgs - Evaluate the arguments to a function call. 1534180f47959a066795cc0f409433023af448bb0328Richard Smithstatic bool EvaluateArgs(ArrayRef<const Expr*> Args, ArgVector &ArgValues, 1535180f47959a066795cc0f409433023af448bb0328Richard Smith EvalInfo &Info) { 1536180f47959a066795cc0f409433023af448bb0328Richard Smith for (ArrayRef<const Expr*>::iterator I = Args.begin(), E = Args.end(); 1537180f47959a066795cc0f409433023af448bb0328Richard Smith I != E; ++I) 1538180f47959a066795cc0f409433023af448bb0328Richard Smith if (!Evaluate(ArgValues[I - Args.begin()], Info, *I)) 1539180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1540180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 1541180f47959a066795cc0f409433023af448bb0328Richard Smith} 1542180f47959a066795cc0f409433023af448bb0328Richard Smith 1543d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith/// Evaluate a function call. 154408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smithstatic bool HandleFunctionCall(const Expr *CallExpr, const FunctionDecl *Callee, 154508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith const LValue *This, 1546f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith ArrayRef<const Expr*> Args, const Stmt *Body, 1547c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith EvalInfo &Info, APValue &Result) { 1548c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (!Info.CheckCallLimit(CallExpr->getExprLoc())) 1549d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith return false; 1550d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 1551180f47959a066795cc0f409433023af448bb0328Richard Smith ArgVector ArgValues(Args.size()); 1552180f47959a066795cc0f409433023af448bb0328Richard Smith if (!EvaluateArgs(Args, ArgValues, Info)) 1553180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1554d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 155508d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith CallStackFrame Frame(Info, CallExpr->getExprLoc(), Callee, This, 155608d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith ArgValues.data()); 1557d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith return EvaluateStmt(Result, Info, Body) == ESR_Returned; 1558d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith} 1559d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 1560180f47959a066795cc0f409433023af448bb0328Richard Smith/// Evaluate a constructor call. 1561f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithstatic bool HandleConstructorCall(const Expr *CallExpr, const LValue &This, 156259efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith ArrayRef<const Expr*> Args, 1563180f47959a066795cc0f409433023af448bb0328Richard Smith const CXXConstructorDecl *Definition, 156459efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith EvalInfo &Info, 1565180f47959a066795cc0f409433023af448bb0328Richard Smith APValue &Result) { 1566c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (!Info.CheckCallLimit(CallExpr->getExprLoc())) 1567180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1568180f47959a066795cc0f409433023af448bb0328Richard Smith 1569180f47959a066795cc0f409433023af448bb0328Richard Smith ArgVector ArgValues(Args.size()); 1570180f47959a066795cc0f409433023af448bb0328Richard Smith if (!EvaluateArgs(Args, ArgValues, Info)) 1571180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1572180f47959a066795cc0f409433023af448bb0328Richard Smith 157308d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith CallStackFrame Frame(Info, CallExpr->getExprLoc(), Definition, 157408d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith &This, ArgValues.data()); 1575180f47959a066795cc0f409433023af448bb0328Richard Smith 1576180f47959a066795cc0f409433023af448bb0328Richard Smith // If it's a delegating constructor, just delegate. 1577180f47959a066795cc0f409433023af448bb0328Richard Smith if (Definition->isDelegatingConstructor()) { 1578180f47959a066795cc0f409433023af448bb0328Richard Smith CXXConstructorDecl::init_const_iterator I = Definition->init_begin(); 1579180f47959a066795cc0f409433023af448bb0328Richard Smith return EvaluateConstantExpression(Result, Info, This, (*I)->getInit()); 1580180f47959a066795cc0f409433023af448bb0328Richard Smith } 1581180f47959a066795cc0f409433023af448bb0328Richard Smith 1582180f47959a066795cc0f409433023af448bb0328Richard Smith // Reserve space for the struct members. 1583180f47959a066795cc0f409433023af448bb0328Richard Smith const CXXRecordDecl *RD = Definition->getParent(); 1584180f47959a066795cc0f409433023af448bb0328Richard Smith if (!RD->isUnion()) 1585180f47959a066795cc0f409433023af448bb0328Richard Smith Result = APValue(APValue::UninitStruct(), RD->getNumBases(), 1586180f47959a066795cc0f409433023af448bb0328Richard Smith std::distance(RD->field_begin(), RD->field_end())); 1587180f47959a066795cc0f409433023af448bb0328Richard Smith 1588180f47959a066795cc0f409433023af448bb0328Richard Smith const ASTRecordLayout &Layout = Info.Ctx.getASTRecordLayout(RD); 1589180f47959a066795cc0f409433023af448bb0328Richard Smith 1590180f47959a066795cc0f409433023af448bb0328Richard Smith unsigned BasesSeen = 0; 1591180f47959a066795cc0f409433023af448bb0328Richard Smith#ifndef NDEBUG 1592180f47959a066795cc0f409433023af448bb0328Richard Smith CXXRecordDecl::base_class_const_iterator BaseIt = RD->bases_begin(); 1593180f47959a066795cc0f409433023af448bb0328Richard Smith#endif 1594180f47959a066795cc0f409433023af448bb0328Richard Smith for (CXXConstructorDecl::init_const_iterator I = Definition->init_begin(), 1595180f47959a066795cc0f409433023af448bb0328Richard Smith E = Definition->init_end(); I != E; ++I) { 1596180f47959a066795cc0f409433023af448bb0328Richard Smith if ((*I)->isBaseInitializer()) { 1597180f47959a066795cc0f409433023af448bb0328Richard Smith QualType BaseType((*I)->getBaseClass(), 0); 1598180f47959a066795cc0f409433023af448bb0328Richard Smith#ifndef NDEBUG 1599180f47959a066795cc0f409433023af448bb0328Richard Smith // Non-virtual base classes are initialized in the order in the class 1600180f47959a066795cc0f409433023af448bb0328Richard Smith // definition. We cannot have a virtual base class for a literal type. 1601180f47959a066795cc0f409433023af448bb0328Richard Smith assert(!BaseIt->isVirtual() && "virtual base for literal type"); 1602180f47959a066795cc0f409433023af448bb0328Richard Smith assert(Info.Ctx.hasSameType(BaseIt->getType(), BaseType) && 1603180f47959a066795cc0f409433023af448bb0328Richard Smith "base class initializers not in expected order"); 1604180f47959a066795cc0f409433023af448bb0328Richard Smith ++BaseIt; 1605180f47959a066795cc0f409433023af448bb0328Richard Smith#endif 1606180f47959a066795cc0f409433023af448bb0328Richard Smith LValue Subobject = This; 1607180f47959a066795cc0f409433023af448bb0328Richard Smith HandleLValueDirectBase(Info, Subobject, RD, 1608180f47959a066795cc0f409433023af448bb0328Richard Smith BaseType->getAsCXXRecordDecl(), &Layout); 1609180f47959a066795cc0f409433023af448bb0328Richard Smith if (!EvaluateConstantExpression(Result.getStructBase(BasesSeen++), Info, 1610180f47959a066795cc0f409433023af448bb0328Richard Smith Subobject, (*I)->getInit())) 1611180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1612180f47959a066795cc0f409433023af448bb0328Richard Smith } else if (FieldDecl *FD = (*I)->getMember()) { 1613180f47959a066795cc0f409433023af448bb0328Richard Smith LValue Subobject = This; 1614180f47959a066795cc0f409433023af448bb0328Richard Smith HandleLValueMember(Info, Subobject, FD, &Layout); 1615180f47959a066795cc0f409433023af448bb0328Richard Smith if (RD->isUnion()) { 1616180f47959a066795cc0f409433023af448bb0328Richard Smith Result = APValue(FD); 1617c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (!EvaluateConstantExpression(Result.getUnionValue(), Info, Subobject, 1618c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith (*I)->getInit(), CCEK_MemberInit)) 1619180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1620180f47959a066795cc0f409433023af448bb0328Richard Smith } else if (!EvaluateConstantExpression( 1621180f47959a066795cc0f409433023af448bb0328Richard Smith Result.getStructField(FD->getFieldIndex()), 1622c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info, Subobject, (*I)->getInit(), CCEK_MemberInit)) 1623180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1624180f47959a066795cc0f409433023af448bb0328Richard Smith } else { 1625180f47959a066795cc0f409433023af448bb0328Richard Smith // FIXME: handle indirect field initializers 1626dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag((*I)->getInit()->getExprLoc(), 1627f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith diag::note_invalid_subexpr_in_const_expr); 1628180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1629180f47959a066795cc0f409433023af448bb0328Richard Smith } 1630180f47959a066795cc0f409433023af448bb0328Richard Smith } 1631180f47959a066795cc0f409433023af448bb0328Richard Smith 1632180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 1633180f47959a066795cc0f409433023af448bb0328Richard Smith} 1634180f47959a066795cc0f409433023af448bb0328Richard Smith 1635d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smithnamespace { 1636770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass HasSideEffect 16378cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ConstStmtVisitor<HasSideEffect, bool> { 16381e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith const ASTContext &Ctx; 1639c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumppublic: 1640c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 16411e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith HasSideEffect(const ASTContext &C) : Ctx(C) {} 1642c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 1643c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // Unhandled nodes conservatively default to having side effects. 16448cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitStmt(const Stmt *S) { 1645c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 1646c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 1647c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 16488cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitParenExpr(const ParenExpr *E) { return Visit(E->getSubExpr()); } 16498cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitGenericSelectionExpr(const GenericSelectionExpr *E) { 1650f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne return Visit(E->getResultExpr()); 1651f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne } 16528cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitDeclRefExpr(const DeclRefExpr *E) { 16531e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 1654c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 1655c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return false; 1656c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 1657f85e193739c953358c865005855253af4f68a497John McCall bool VisitObjCIvarRefExpr(const ObjCIvarRefExpr *E) { 16581e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 1659f85e193739c953358c865005855253af4f68a497John McCall return true; 1660f85e193739c953358c865005855253af4f68a497John McCall return false; 1661f85e193739c953358c865005855253af4f68a497John McCall } 1662f85e193739c953358c865005855253af4f68a497John McCall bool VisitBlockDeclRefExpr (const BlockDeclRefExpr *E) { 16631e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 1664f85e193739c953358c865005855253af4f68a497John McCall return true; 1665f85e193739c953358c865005855253af4f68a497John McCall return false; 1666f85e193739c953358c865005855253af4f68a497John McCall } 1667f85e193739c953358c865005855253af4f68a497John McCall 1668c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // We don't want to evaluate BlockExprs multiple times, as they generate 1669c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // a ton of code. 16708cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBlockExpr(const BlockExpr *E) { return true; } 16718cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitPredefinedExpr(const PredefinedExpr *E) { return false; } 16728cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) 1673c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump { return Visit(E->getInitializer()); } 16748cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitMemberExpr(const MemberExpr *E) { return Visit(E->getBase()); } 16758cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitIntegerLiteral(const IntegerLiteral *E) { return false; } 16768cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitFloatingLiteral(const FloatingLiteral *E) { return false; } 16778cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitStringLiteral(const StringLiteral *E) { return false; } 16788cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCharacterLiteral(const CharacterLiteral *E) { return false; } 16798cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *E) 1680f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne { return false; } 16818cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitArraySubscriptExpr(const ArraySubscriptExpr *E) 1682980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 16838cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitChooseExpr(const ChooseExpr *E) 16841e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith { return Visit(E->getChosenSubExpr(Ctx)); } 16858cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E) { return Visit(E->getSubExpr()); } 16868cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBinAssign(const BinaryOperator *E) { return true; } 16878cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCompoundAssignOperator(const BinaryOperator *E) { return true; } 16888cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBinaryOperator(const BinaryOperator *E) 1689980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 16908cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPreInc(const UnaryOperator *E) { return true; } 16918cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPostInc(const UnaryOperator *E) { return true; } 16928cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPreDec(const UnaryOperator *E) { return true; } 16938cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPostDec(const UnaryOperator *E) { return true; } 16948cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryDeref(const UnaryOperator *E) { 16951e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 1696c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 1697980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump return Visit(E->getSubExpr()); 1698c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 16998cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryOperator(const UnaryOperator *E) { return Visit(E->getSubExpr()); } 1700363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner 1701363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner // Has side effects if any element does. 17028cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitInitListExpr(const InitListExpr *E) { 1703363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner for (unsigned i = 0, e = E->getNumInits(); i != e; ++i) 1704363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner if (Visit(E->getInit(i))) return true; 17058cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (const Expr *filler = E->getArrayFiller()) 17064423ac0282acb8ba801eb05b38712438dc0c1e3eArgyrios Kyrtzidis return Visit(filler); 1707363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner return false; 1708363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner } 1709ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor 17108cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitSizeOfPackExpr(const SizeOfPackExpr *) { return false; } 1711c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump}; 1712c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 171356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallclass OpaqueValueEvaluation { 171456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall EvalInfo &info; 171556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall OpaqueValueExpr *opaqueValue; 171656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 171756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallpublic: 171856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall OpaqueValueEvaluation(EvalInfo &info, OpaqueValueExpr *opaqueValue, 171956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Expr *value) 172056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall : info(info), opaqueValue(opaqueValue) { 172156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 172256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall // If evaluation fails, fail immediately. 17231e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (!Evaluate(info.OpaqueValues[opaqueValue], info, value)) { 172456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall this->opaqueValue = 0; 172556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall return; 172656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 172756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 172856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 172956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall bool hasError() const { return opaqueValue == 0; } 173056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 173156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall ~OpaqueValueEvaluation() { 17321e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith // FIXME: This will not work for recursive constexpr functions using opaque 17331e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith // values. Restore the former value. 173456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (opaqueValue) info.OpaqueValues.erase(opaqueValue); 173556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 173656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall}; 173756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 1738c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump} // end anonymous namespace 1739c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 17404efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 17418cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne// Generic Evaluation 17428cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne//===----------------------------------------------------------------------===// 17438cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournenamespace { 17448cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 1745f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith// FIXME: RetTy is always bool. Remove it. 1746f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithtemplate <class Derived, typename RetTy=bool> 17478cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourneclass ExprEvaluatorBase 17488cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ConstStmtVisitor<Derived, RetTy> { 17498cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourneprivate: 175047a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith RetTy DerivedSuccess(const CCValue &V, const Expr *E) { 17518cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return static_cast<Derived*>(this)->Success(V, E); 17528cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 1753f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith RetTy DerivedValueInitialization(const Expr *E) { 1754f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return static_cast<Derived*>(this)->ValueInitialization(E); 1755f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 17568cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 17578cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourneprotected: 17588cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne EvalInfo &Info; 17598cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne typedef ConstStmtVisitor<Derived, RetTy> StmtVisitorTy; 17608cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne typedef ExprEvaluatorBase ExprEvaluatorBaseTy; 17618cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 1762dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith OptionalDiagnostic CCEDiag(const Expr *E, diag::kind D) { 1763d5093420308784e31071c8cd723a58d74159f393Richard Smith return Info.CCEDiag(E->getExprLoc(), D); 1764f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1765f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 1766f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith /// Report an evaluation error. This should only be called when an error is 1767f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith /// first discovered. When propagating an error, just return false. 1768f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith bool Error(const Expr *E, diag::kind D) { 1769dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(E->getExprLoc(), D); 1770f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 1771f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1772f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith bool Error(const Expr *E) { 1773f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E, diag::note_invalid_subexpr_in_const_expr); 1774f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 1775f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 1776f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith RetTy ValueInitialization(const Expr *E) { return Error(E); } 1777f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith 17788cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournepublic: 17798cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne ExprEvaluatorBase(EvalInfo &Info) : Info(Info) {} 17808cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 17818cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitStmt(const Stmt *) { 1782b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Expression evaluator should not be called on stmts"); 17838cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 17848cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitExpr(const Expr *E) { 1785f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 17868cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 17878cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 17888cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitParenExpr(const ParenExpr *E) 17898cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getSubExpr()); } 17908cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitUnaryExtension(const UnaryOperator *E) 17918cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getSubExpr()); } 17928cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitUnaryPlus(const UnaryOperator *E) 17938cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getSubExpr()); } 17948cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitChooseExpr(const ChooseExpr *E) 17958cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getChosenSubExpr(Info.Ctx)); } 17968cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitGenericSelectionExpr(const GenericSelectionExpr *E) 17978cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getResultExpr()); } 179891a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall RetTy VisitSubstNonTypeTemplateParmExpr(const SubstNonTypeTemplateParmExpr *E) 179991a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall { return StmtVisitorTy::Visit(E->getReplacement()); } 18003d75ca836205856077c18e30e9447accbd85f751Richard Smith RetTy VisitCXXDefaultArgExpr(const CXXDefaultArgExpr *E) 18013d75ca836205856077c18e30e9447accbd85f751Richard Smith { return StmtVisitorTy::Visit(E->getExpr()); } 18028cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 1803c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith RetTy VisitCXXReinterpretCastExpr(const CXXReinterpretCastExpr *E) { 1804c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith CCEDiag(E, diag::note_constexpr_invalid_cast) << 0; 1805c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith return static_cast<Derived*>(this)->VisitCastExpr(E); 1806c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith } 1807c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith RetTy VisitCXXDynamicCastExpr(const CXXDynamicCastExpr *E) { 1808c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith CCEDiag(E, diag::note_constexpr_invalid_cast) << 1; 1809c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith return static_cast<Derived*>(this)->VisitCastExpr(E); 1810c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith } 1811c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith 1812e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith RetTy VisitBinaryOperator(const BinaryOperator *E) { 1813e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith switch (E->getOpcode()) { 1814e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith default: 1815f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 1816e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1817e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case BO_Comma: 1818e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith VisitIgnoredValue(E->getLHS()); 1819e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return StmtVisitorTy::Visit(E->getRHS()); 1820e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 1821e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case BO_PtrMemD: 1822e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case BO_PtrMemI: { 1823e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LValue Obj; 1824e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!HandleMemberPointerAccess(Info, E, Obj)) 1825e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 1826e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith CCValue Result; 1827f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!HandleLValueToRValueConversion(Info, E, E->getType(), Obj, Result)) 1828e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 1829e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return DerivedSuccess(Result, E); 1830e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 1831e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 1832e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 1833e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 18348cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitBinaryConditionalOperator(const BinaryConditionalOperator *E) { 18358cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne OpaqueValueEvaluation opaque(Info, E->getOpaqueValue(), E->getCommon()); 18368cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (opaque.hasError()) 1837f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 18388cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 18398cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool cond; 1840c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (!EvaluateAsBooleanCondition(E->getCond(), cond, Info)) 1841f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 18428cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 18438cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return StmtVisitorTy::Visit(cond ? E->getTrueExpr() : E->getFalseExpr()); 18448cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 18458cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 18468cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitConditionalOperator(const ConditionalOperator *E) { 18478cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool BoolResult; 1848c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (!EvaluateAsBooleanCondition(E->getCond(), BoolResult, Info)) 1849f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 18508cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 1851c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith Expr *EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 18528cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return StmtVisitorTy::Visit(EvalExpr); 18538cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 18548cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 18558cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitOpaqueValueExpr(const OpaqueValueExpr *E) { 185647a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith const CCValue *Value = Info.getOpaqueValue(E); 185742786839cff1ccbe4d883b81d01846c5d774ffc6Argyrios Kyrtzidis if (!Value) { 185842786839cff1ccbe4d883b81d01846c5d774ffc6Argyrios Kyrtzidis const Expr *Source = E->getSourceExpr(); 185942786839cff1ccbe4d883b81d01846c5d774ffc6Argyrios Kyrtzidis if (!Source) 1860f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 186142786839cff1ccbe4d883b81d01846c5d774ffc6Argyrios Kyrtzidis if (Source == E) { // sanity checking. 186242786839cff1ccbe4d883b81d01846c5d774ffc6Argyrios Kyrtzidis assert(0 && "OpaqueValueExpr recursively refers to itself"); 1863f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 186442786839cff1ccbe4d883b81d01846c5d774ffc6Argyrios Kyrtzidis } 186542786839cff1ccbe4d883b81d01846c5d774ffc6Argyrios Kyrtzidis return StmtVisitorTy::Visit(Source); 186642786839cff1ccbe4d883b81d01846c5d774ffc6Argyrios Kyrtzidis } 186747a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith return DerivedSuccess(*Value, E); 18688cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 1869f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith 1870d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith RetTy VisitCallExpr(const CallExpr *E) { 1871e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const Expr *Callee = E->getCallee()->IgnoreParens(); 1872d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith QualType CalleeType = Callee->getType(); 1873d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 18746142ca7790aa09a6e13592b70f142cc4bbcadcaeDevang Patel const FunctionDecl *FD = 0; 187559efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith LValue *This = 0, ThisVal; 187659efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith llvm::ArrayRef<const Expr*> Args(E->getArgs(), E->getNumArgs()); 187759efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 187859efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith // Extract function decl and 'this' pointer from the callee. 187959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith if (CalleeType->isSpecificBuiltinType(BuiltinType::BoundMember)) { 1880f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith const ValueDecl *Member = 0; 1881e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (const MemberExpr *ME = dyn_cast<MemberExpr>(Callee)) { 1882e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Explicit bound member calls, such as x.f() or p->g(); 1883e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!EvaluateObjectArgument(Info, ME->getBase(), ThisVal)) 1884f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 1885f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith Member = ME->getMemberDecl(); 1886e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith This = &ThisVal; 1887e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } else if (const BinaryOperator *BE = dyn_cast<BinaryOperator>(Callee)) { 1888e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Indirect bound member calls ('.*' or '->*'). 1889f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith Member = HandleMemberPointerAccess(Info, BE, ThisVal, false); 1890f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!Member) return false; 1891e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith This = &ThisVal; 1892e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } else 1893f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(Callee); 1894f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 1895f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith FD = dyn_cast<FunctionDecl>(Member); 1896f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!FD) 1897f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(Callee); 189859efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith } else if (CalleeType->isFunctionPointerType()) { 189959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith CCValue Call; 1900f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!Evaluate(Call, Info, Callee)) 1901f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 190259efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 1903f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!Call.isLValue() || !Call.getLValueOffset().isZero()) 1904f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(Callee); 19051bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith FD = dyn_cast_or_null<FunctionDecl>( 19061bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith Call.getLValueBase().dyn_cast<const ValueDecl*>()); 190759efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith if (!FD) 1908f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(Callee); 190959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 191059efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith // Overloaded operator calls to member functions are represented as normal 191159efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith // calls with '*this' as the first argument. 191259efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD); 191359efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith if (MD && !MD->isStatic()) { 1914f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // FIXME: When selecting an implicit conversion for an overloaded 1915f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // operator delete, we sometimes try to evaluate calls to conversion 1916f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // operators without a 'this' parameter! 1917f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (Args.empty()) 1918f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 1919f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 192059efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith if (!EvaluateObjectArgument(Info, Args[0], ThisVal)) 192159efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith return false; 192259efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith This = &ThisVal; 192359efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith Args = Args.slice(1); 192459efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith } 1925d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 192659efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith // Don't call function pointers which have been cast to some other type. 192759efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith if (!Info.Ctx.hasSameType(CalleeType->getPointeeType(), FD->getType())) 1928f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 192959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith } else 1930f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 1931d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 1932c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const FunctionDecl *Definition = 0; 1933d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith Stmt *Body = FD->getBody(Definition); 193469c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith APValue Result; 1935d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 1936c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (!CheckConstexprFunction(Info, E->getExprLoc(), FD, Definition) || 193708d6e032a2a0a8656d12b3b7b93942987bb12eb7Richard Smith !HandleFunctionCall(E, Definition, This, Args, Body, Info, Result)) 1938f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 1939d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 1940f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return DerivedSuccess(CCValue(Result, CCValue::GlobalValue()), E); 1941d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith } 1942d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 1943c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith RetTy VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 1944c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return StmtVisitorTy::Visit(E->getInitializer()); 1945c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith } 1946f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith RetTy VisitInitListExpr(const InitListExpr *E) { 1947f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith if (Info.getLangOpts().CPlusPlus0x) { 1948f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith if (E->getNumInits() == 0) 1949f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return DerivedValueInitialization(E); 1950f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith if (E->getNumInits() == 1) 1951f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return StmtVisitorTy::Visit(E->getInit(0)); 1952f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 1953f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 1954f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 1955f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith RetTy VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { 1956f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return DerivedValueInitialization(E); 1957f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 1958f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith RetTy VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E) { 1959f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return DerivedValueInitialization(E); 1960f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 1961e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith RetTy VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *E) { 1962e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return DerivedValueInitialization(E); 1963e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 1964f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith 1965180f47959a066795cc0f409433023af448bb0328Richard Smith /// A member expression where the object is a prvalue is itself a prvalue. 1966180f47959a066795cc0f409433023af448bb0328Richard Smith RetTy VisitMemberExpr(const MemberExpr *E) { 1967180f47959a066795cc0f409433023af448bb0328Richard Smith assert(!E->isArrow() && "missing call to bound member function?"); 1968180f47959a066795cc0f409433023af448bb0328Richard Smith 1969180f47959a066795cc0f409433023af448bb0328Richard Smith CCValue Val; 1970180f47959a066795cc0f409433023af448bb0328Richard Smith if (!Evaluate(Val, Info, E->getBase())) 1971180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 1972180f47959a066795cc0f409433023af448bb0328Richard Smith 1973180f47959a066795cc0f409433023af448bb0328Richard Smith QualType BaseTy = E->getBase()->getType(); 1974180f47959a066795cc0f409433023af448bb0328Richard Smith 1975180f47959a066795cc0f409433023af448bb0328Richard Smith const FieldDecl *FD = dyn_cast<FieldDecl>(E->getMemberDecl()); 1976f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!FD) return Error(E); 1977180f47959a066795cc0f409433023af448bb0328Richard Smith assert(!FD->getType()->isReferenceType() && "prvalue reference?"); 1978180f47959a066795cc0f409433023af448bb0328Richard Smith assert(BaseTy->getAs<RecordType>()->getDecl()->getCanonicalDecl() == 1979180f47959a066795cc0f409433023af448bb0328Richard Smith FD->getParent()->getCanonicalDecl() && "record / field mismatch"); 1980180f47959a066795cc0f409433023af448bb0328Richard Smith 1981180f47959a066795cc0f409433023af448bb0328Richard Smith SubobjectDesignator Designator; 1982180f47959a066795cc0f409433023af448bb0328Richard Smith Designator.addDecl(FD); 1983180f47959a066795cc0f409433023af448bb0328Richard Smith 1984f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return ExtractSubobject(Info, E, Val, BaseTy, Designator, E->getType()) && 1985180f47959a066795cc0f409433023af448bb0328Richard Smith DerivedSuccess(Val, E); 1986180f47959a066795cc0f409433023af448bb0328Richard Smith } 1987180f47959a066795cc0f409433023af448bb0328Richard Smith 1988c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith RetTy VisitCastExpr(const CastExpr *E) { 1989c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith switch (E->getCastKind()) { 1990c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith default: 1991c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith break; 1992c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 1993c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case CK_NoOp: 1994c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return StmtVisitorTy::Visit(E->getSubExpr()); 1995c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 1996c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case CK_LValueToRValue: { 1997c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith LValue LVal; 1998f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!EvaluateLValue(E->getSubExpr(), LVal, Info)) 1999f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 2000f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith CCValue RVal; 2001f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!HandleLValueToRValueConversion(Info, E, E->getType(), LVal, RVal)) 2002f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 2003f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return DerivedSuccess(RVal, E); 2004c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith } 2005c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith } 2006c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 2007f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 2008c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith } 2009c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 20108327fad71da34492d82c532f42a58cb4baff81a3Richard Smith /// Visit a value which is evaluated, but whose value is ignored. 20118327fad71da34492d82c532f42a58cb4baff81a3Richard Smith void VisitIgnoredValue(const Expr *E) { 201247a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue Scratch; 20138327fad71da34492d82c532f42a58cb4baff81a3Richard Smith if (!Evaluate(Scratch, Info, E)) 20148327fad71da34492d82c532f42a58cb4baff81a3Richard Smith Info.EvalStatus.HasSideEffects = true; 20158327fad71da34492d82c532f42a58cb4baff81a3Richard Smith } 20168cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne}; 20178cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 20188cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne} 20198cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 20208cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne//===----------------------------------------------------------------------===// 2021e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith// Common base class for lvalue and temporary evaluation. 2022e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith//===----------------------------------------------------------------------===// 2023e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithnamespace { 2024e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithtemplate<class Derived> 2025e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithclass LValueExprEvaluatorBase 2026e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith : public ExprEvaluatorBase<Derived, bool> { 2027e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithprotected: 2028e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LValue &Result; 2029e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith typedef LValueExprEvaluatorBase LValueExprEvaluatorBaseTy; 2030e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith typedef ExprEvaluatorBase<Derived, bool> ExprEvaluatorBaseTy; 2031e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2032e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool Success(APValue::LValueBase B) { 2033e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result.set(B); 2034e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 2035e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2036e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2037e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithpublic: 2038e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LValueExprEvaluatorBase(EvalInfo &Info, LValue &Result) : 2039e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith ExprEvaluatorBaseTy(Info), Result(Result) {} 2040e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2041e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool Success(const CCValue &V, const Expr *E) { 2042e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result.setFrom(V); 2043e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 2044e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2045e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2046e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool CheckValidLValue() { 2047e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // C++11 [basic.lval]p1: An lvalue designates a function or an object. Hence 2048e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // there are no null references, nor once-past-the-end references. 2049e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // FIXME: Check for one-past-the-end array indices 2050e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return Result.Base && !Result.Designator.Invalid && 2051e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith !Result.Designator.OnePastTheEnd; 2052e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2053e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2054e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool VisitMemberExpr(const MemberExpr *E) { 2055e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Handle non-static data members. 2056e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith QualType BaseTy; 2057e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (E->isArrow()) { 2058e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!EvaluatePointer(E->getBase(), Result, this->Info)) 2059e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2060e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith BaseTy = E->getBase()->getType()->getAs<PointerType>()->getPointeeType(); 2061c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith } else if (E->getBase()->isRValue()) { 2062af2c7a194592401394233b7cbcdd3cfd0a7a38ddRichard Smith assert(E->getBase()->getType()->isRecordType()); 2063c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (!EvaluateTemporary(E->getBase(), Result, this->Info)) 2064c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return false; 2065c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith BaseTy = E->getBase()->getType(); 2066e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } else { 2067e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!this->Visit(E->getBase())) 2068e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2069e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith BaseTy = E->getBase()->getType(); 2070e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2071e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // FIXME: In C++11, require the result to be a valid lvalue. 2072e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2073e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const FieldDecl *FD = dyn_cast<FieldDecl>(E->getMemberDecl()); 2074e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // FIXME: Handle IndirectFieldDecls 2075f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!FD) return this->Error(E); 2076e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith assert(BaseTy->getAs<RecordType>()->getDecl()->getCanonicalDecl() == 2077e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith FD->getParent()->getCanonicalDecl() && "record / field mismatch"); 2078e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith (void)BaseTy; 2079e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2080e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith HandleLValueMember(this->Info, Result, FD); 2081e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2082e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (FD->getType()->isReferenceType()) { 2083e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith CCValue RefValue; 2084f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!HandleLValueToRValueConversion(this->Info, E, FD->getType(), Result, 2085e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith RefValue)) 2086e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2087e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return Success(RefValue, E); 2088e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2089e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 2090e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2091e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2092e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool VisitBinaryOperator(const BinaryOperator *E) { 2093e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith switch (E->getOpcode()) { 2094e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith default: 2095e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return ExprEvaluatorBaseTy::VisitBinaryOperator(E); 2096e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2097e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case BO_PtrMemD: 2098e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case BO_PtrMemI: 2099e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return HandleMemberPointerAccess(this->Info, E, Result); 2100e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2101e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2102e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2103e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool VisitCastExpr(const CastExpr *E) { 2104e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith switch (E->getCastKind()) { 2105e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith default: 2106e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return ExprEvaluatorBaseTy::VisitCastExpr(E); 2107e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2108e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case CK_DerivedToBase: 2109e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case CK_UncheckedDerivedToBase: { 2110e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!this->Visit(E->getSubExpr())) 2111e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2112e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!CheckValidLValue()) 2113e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2114e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2115e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Now figure out the necessary offset to add to the base LV to get from 2116e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // the derived class to the base class. 2117e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith QualType Type = E->getSubExpr()->getType(); 2118e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2119e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith for (CastExpr::path_const_iterator PathI = E->path_begin(), 2120e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith PathE = E->path_end(); PathI != PathE; ++PathI) { 2121e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!HandleLValueBase(this->Info, Result, Type->getAsCXXRecordDecl(), 2122e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith *PathI)) 2123e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2124e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Type = (*PathI)->getType(); 2125e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2126e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2127e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 2128e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2129e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2130e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2131e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith}; 2132e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} 2133e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2134e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith//===----------------------------------------------------------------------===// 21354efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// LValue Evaluation 2136c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// 2137c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// This is used for evaluating lvalues (in C and C++), xvalues (in C++11), 2138c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// function designators (in C), decl references to void objects (in C), and 2139c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// temporaries (if building with -Wno-address-of-temporary). 2140c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// 2141c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// LValue evaluation produces values comprising a base expression of one of the 2142c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// following types: 21431bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith// - Declarations 21441bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith// * VarDecl 21451bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith// * FunctionDecl 21461bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith// - Literals 2147c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// * CompoundLiteralExpr in C 2148c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// * StringLiteral 2149c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// * PredefinedExpr 2150180f47959a066795cc0f409433023af448bb0328Richard Smith// * ObjCStringLiteralExpr 2151c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// * ObjCEncodeExpr 2152c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// * AddrLabelExpr 2153c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// * BlockExpr 2154c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// * CallExpr for a MakeStringConstant builtin 21551bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith// - Locals and temporaries 21561bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith// * Any Expr, with a Frame indicating the function in which the temporary was 21571bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith// evaluated. 21581bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith// plus an offset in bytes. 21594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 21604efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmannamespace { 2161770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass LValueExprEvaluator 2162e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith : public LValueExprEvaluatorBase<LValueExprEvaluator> { 21634efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanpublic: 2164e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LValueExprEvaluator(EvalInfo &Info, LValue &Result) : 2165e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LValueExprEvaluatorBaseTy(Info, Result) {} 21661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2167c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith bool VisitVarDecl(const Expr *E, const VarDecl *VD); 2168c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 21698cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitDeclRefExpr(const DeclRefExpr *E); 21708cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitPredefinedExpr(const PredefinedExpr *E) { return Success(E); } 2171bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith bool VisitMaterializeTemporaryExpr(const MaterializeTemporaryExpr *E); 21728cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 21738cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitMemberExpr(const MemberExpr *E); 21748cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitStringLiteral(const StringLiteral *E) { return Success(E); } 21758cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitObjCEncodeExpr(const ObjCEncodeExpr *E) { return Success(E); } 21768cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitArraySubscriptExpr(const ArraySubscriptExpr *E); 21778cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryDeref(const UnaryOperator *E); 21788cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 21798cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E) { 218026bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson switch (E->getCastKind()) { 218126bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson default: 2182e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return LValueExprEvaluatorBaseTy::VisitCastExpr(E); 218326bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson 2184db924224b51b153f24fbe492102d4edebcbbb7f4Eli Friedman case CK_LValueBitCast: 2185c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith this->CCEDiag(E, diag::note_constexpr_invalid_cast) << 2; 21860a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (!Visit(E->getSubExpr())) 21870a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return false; 21880a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Result.Designator.setInvalid(); 21890a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return true; 2190db924224b51b153f24fbe492102d4edebcbbb7f4Eli Friedman 2191e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case CK_BaseToDerived: 2192180f47959a066795cc0f409433023af448bb0328Richard Smith if (!Visit(E->getSubExpr())) 2193180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 2194e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!CheckValidLValue()) 2195e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2196e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return HandleBaseToDerivedCast(Info, E, Result); 219726bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 219826bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 2199cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl 2200ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: __real__, __imag__ 22018cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 22024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman}; 22034efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} // end anonymous namespace 22044efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2205c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// Evaluate an expression as an lvalue. This can be legitimately called on 2206c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// expressions which are not glvalues, in a few cases: 2207c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// * function designators in C, 2208c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// * "extern void" objects, 2209c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// * temporaries, if building with -Wno-address-of-temporary. 2210efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluateLValue(const Expr* E, LValue& Result, EvalInfo &Info) { 2211c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith assert((E->isGLValue() || E->getType()->isFunctionType() || 2212c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith E->getType()->isVoidType() || isa<CXXTemporaryObjectExpr>(E)) && 2213c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith "can't evaluate expression as an lvalue"); 22148cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return LValueExprEvaluator(Info, Result).Visit(E); 22154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 22164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 22178cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitDeclRefExpr(const DeclRefExpr *E) { 22181bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(E->getDecl())) 22191bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith return Success(FD); 22201bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (const VarDecl *VD = dyn_cast<VarDecl>(E->getDecl())) 2221c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return VisitVarDecl(E, VD); 2222c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return Error(E); 2223c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith} 2224436c8898cd1c93c5bacd3fcc4ac586bc5cd77062Richard Smith 2225c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smithbool LValueExprEvaluator::VisitVarDecl(const Expr *E, const VarDecl *VD) { 2226177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith if (!VD->getType()->isReferenceType()) { 2227177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith if (isa<ParmVarDecl>(VD)) { 22281bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith Result.set(VD, Info.CurrentCall); 2229177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith return true; 2230177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith } 22311bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith return Success(VD); 2232177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith } 223350c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman 223447a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue V; 2235f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!EvaluateVarDeclInit(Info, E, VD, Info.CurrentCall, V)) 2236f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 2237f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Success(V, E); 223835873c49adad211ff466e34342a52665742794f5Anders Carlsson} 223935873c49adad211ff466e34342a52665742794f5Anders Carlsson 2240bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smithbool LValueExprEvaluator::VisitMaterializeTemporaryExpr( 2241bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith const MaterializeTemporaryExpr *E) { 2242e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (E->GetTemporaryExpr()->isRValue()) { 2243af2c7a194592401394233b7cbcdd3cfd0a7a38ddRichard Smith if (E->getType()->isRecordType()) 2244e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return EvaluateTemporary(E->GetTemporaryExpr(), Result, Info); 2245e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2246e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result.set(E, Info.CurrentCall); 2247e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return EvaluateConstantExpression(Info.CurrentCall->Temporaries[E], Info, 2248e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result, E->GetTemporaryExpr()); 2249e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2250e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2251e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Materialization of an lvalue temporary occurs when we need to force a copy 2252e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // (for instance, if it's a bitfield). 2253e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // FIXME: The AST should contain an lvalue-to-rvalue node for such cases. 2254e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!Visit(E->GetTemporaryExpr())) 2255e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2256f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!HandleLValueToRValueConversion(Info, E, E->getType(), Result, 2257e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Info.CurrentCall->Temporaries[E])) 2258e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 22591bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith Result.set(E, Info.CurrentCall); 2260e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 2261bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith} 2262bd552efbeff3a64a1c400d2bba18f13f84abd8abRichard Smith 22638cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool 22648cad3046be06ea73ff8892d947697a21d7a440d3Peter CollingbourneLValueExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 2265c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith assert(!Info.getLangOpts().CPlusPlus && "lvalue compound literal in c++?"); 2266c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // Defer visiting the literal until the lvalue-to-rvalue conversion. We can 2267c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // only see this when folding in C, so there's no standard to follow here. 2268efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 22694efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 22704efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 22718cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitMemberExpr(const MemberExpr *E) { 2272c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // Handle static data members. 2273c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (const VarDecl *VD = dyn_cast<VarDecl>(E->getMemberDecl())) { 2274c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith VisitIgnoredValue(E->getBase()); 2275c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return VisitVarDecl(E, VD); 2276c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith } 2277c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 2278d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith // Handle static member functions. 2279d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(E->getMemberDecl())) { 2280d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith if (MD->isStatic()) { 2281d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith VisitIgnoredValue(E->getBase()); 22821bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith return Success(MD); 2283d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith } 2284d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith } 2285d0dcceae2a8ca0e37b5dd471a704de8583d49c95Richard Smith 2286180f47959a066795cc0f409433023af448bb0328Richard Smith // Handle non-static data members. 2287e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return LValueExprEvaluatorBaseTy::VisitMemberExpr(E); 22884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 22894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 22908cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitArraySubscriptExpr(const ArraySubscriptExpr *E) { 2291c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // FIXME: Deal with vectors as array subscript bases. 2292c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (E->getBase()->getType()->isVectorType()) 2293f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 2294c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 22953068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getBase(), Result, Info)) 2296efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 22971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22983068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APSInt Index; 22993068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluateInteger(E->getIdx(), Index, Info)) 2300efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 2301180f47959a066795cc0f409433023af448bb0328Richard Smith int64_t IndexValue 2302180f47959a066795cc0f409433023af448bb0328Richard Smith = Index.isSigned() ? Index.getSExtValue() 2303180f47959a066795cc0f409433023af448bb0328Richard Smith : static_cast<int64_t>(Index.getZExtValue()); 23043068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 2305e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // FIXME: In C++11, require the result to be a valid lvalue. 2306180f47959a066795cc0f409433023af448bb0328Richard Smith return HandleLValueArrayAdjustment(Info, Result, E->getType(), IndexValue); 23073068d117951a8df54bae9db039b56201ab10962bAnders Carlsson} 23084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 23098cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitUnaryDeref(const UnaryOperator *E) { 2310e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // FIXME: In C++11, require the result to be a valid lvalue. 2311efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluatePointer(E->getSubExpr(), Result, Info); 2312e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman} 2313e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman 23144efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 2315f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Pointer Evaluation 2316f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 2317f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 2318c754aa62643e66ab967ca32ae8b0b3fc419bba25Anders Carlssonnamespace { 2319770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass PointerExprEvaluator 23208cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<PointerExprEvaluator, bool> { 2321efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue &Result; 2322efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 23238cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const Expr *E) { 23241bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith Result.set(E); 2325efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 2326efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 23272bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonpublic: 23281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2329efdb83e26f9a1fd2566afe54461216cd84814d42John McCall PointerExprEvaluator(EvalInfo &info, LValue &Result) 23308cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(Result) {} 2331f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 233247a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith bool Success(const CCValue &V, const Expr *E) { 23338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result.setFrom(V); 23348cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 23352bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 2336f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith bool ValueInitialization(const Expr *E) { 2337f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return Success((Expr*)0); 2338f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 23392bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 2340efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitBinaryOperator(const BinaryOperator *E); 23418cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr* E); 2342efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitUnaryAddrOf(const UnaryOperator *E); 23438cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitObjCStringLiteral(const ObjCStringLiteral *E) 2344efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success(E); } 23458cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitAddrLabelExpr(const AddrLabelExpr *E) 2346efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success(E); } 23478cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCallExpr(const CallExpr *E); 23488cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBlockExpr(const BlockExpr *E) { 2349469a1eb996e1cb0be54f9b210f836afbddcbb2ccJohn McCall if (!E->getBlockDecl()->hasCaptures()) 2350efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 2351f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 2352b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump } 2353180f47959a066795cc0f409433023af448bb0328Richard Smith bool VisitCXXThisExpr(const CXXThisExpr *E) { 2354180f47959a066795cc0f409433023af448bb0328Richard Smith if (!Info.CurrentCall->This) 2355f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 2356180f47959a066795cc0f409433023af448bb0328Richard Smith Result = *Info.CurrentCall->This; 2357180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 2358180f47959a066795cc0f409433023af448bb0328Richard Smith } 235956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 2360ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: @protocol, @selector 23612bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson}; 2362f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 23632bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 2364efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluatePointer(const Expr* E, LValue& Result, EvalInfo &Info) { 2365c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith assert(E->isRValue() && E->getType()->hasPointerRepresentation()); 23668cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return PointerExprEvaluator(Info, Result).Visit(E); 2367f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 2368650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 2369efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 23702de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() != BO_Add && 23712de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall E->getOpcode() != BO_Sub) 2372e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return ExprEvaluatorBaseTy::VisitBinaryOperator(E); 23731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2374650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *PExp = E->getLHS(); 2375650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *IExp = E->getRHS(); 2376650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (IExp->getType()->isPointerType()) 2377f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner std::swap(PExp, IExp); 23781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2379efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(PExp, Result, Info)) 2380efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 23811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2382efdb83e26f9a1fd2566afe54461216cd84814d42John McCall llvm::APSInt Offset; 2383efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateInteger(IExp, Offset, Info)) 2384efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 2385efdb83e26f9a1fd2566afe54461216cd84814d42John McCall int64_t AdditionalOffset 2386efdb83e26f9a1fd2566afe54461216cd84814d42John McCall = Offset.isSigned() ? Offset.getSExtValue() 2387efdb83e26f9a1fd2566afe54461216cd84814d42John McCall : static_cast<int64_t>(Offset.getZExtValue()); 23880a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (E->getOpcode() == BO_Sub) 23890a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith AdditionalOffset = -AdditionalOffset; 2390650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 2391180f47959a066795cc0f409433023af448bb0328Richard Smith QualType Pointee = PExp->getType()->getAs<PointerType>()->getPointeeType(); 2392e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // FIXME: In C++11, require the result to be a valid lvalue. 2393180f47959a066795cc0f409433023af448bb0328Richard Smith return HandleLValueArrayAdjustment(Info, Result, Pointee, AdditionalOffset); 2394650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 23954efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2396efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitUnaryAddrOf(const UnaryOperator *E) { 2397efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluateLValue(E->getSubExpr(), Result, Info); 23984efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 23991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24008cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool PointerExprEvaluator::VisitCastExpr(const CastExpr* E) { 24018cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr* SubExpr = E->getSubExpr(); 2402650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 240309a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman switch (E->getCastKind()) { 240409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman default: 240509a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 240609a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 24072de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_BitCast: 24081d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_CPointerToObjCPointerCast: 24091d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_BlockPointerToObjCPointerCast: 24102de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_AnyPointerToBlockPointerCast: 2411c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith // Bitcasts to cv void* are static_casts, not reinterpret_casts, so are 2412c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith // permitted in constant expressions in C++11. Bitcasts from cv void* are 2413c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith // also static_casts, but we disallow them as a resolution to DR1312. 24144cd9b8f7fb2cebf614e6e2bc766fad27ffd2e9deRichard Smith if (!E->getType()->isVoidPointerType()) { 24154cd9b8f7fb2cebf614e6e2bc766fad27ffd2e9deRichard Smith if (SubExpr->getType()->isVoidPointerType()) 24164cd9b8f7fb2cebf614e6e2bc766fad27ffd2e9deRichard Smith CCEDiag(E, diag::note_constexpr_invalid_cast) 24174cd9b8f7fb2cebf614e6e2bc766fad27ffd2e9deRichard Smith << 3 << SubExpr->getType(); 24184cd9b8f7fb2cebf614e6e2bc766fad27ffd2e9deRichard Smith else 24194cd9b8f7fb2cebf614e6e2bc766fad27ffd2e9deRichard Smith CCEDiag(E, diag::note_constexpr_invalid_cast) << 2; 24204cd9b8f7fb2cebf614e6e2bc766fad27ffd2e9deRichard Smith } 24210a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith if (!Visit(SubExpr)) 24220a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return false; 24230a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Result.Designator.setInvalid(); 24240a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return true; 242509a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 24265c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson case CK_DerivedToBase: 24275c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson case CK_UncheckedDerivedToBase: { 242847a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith if (!EvaluatePointer(E->getSubExpr(), Result, Info)) 24295c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return false; 2430e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!Result.Base && Result.Offset.isZero()) 2431e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 24325c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 2433180f47959a066795cc0f409433023af448bb0328Richard Smith // Now figure out the necessary offset to add to the base LV to get from 24345c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // the derived class to the base class. 2435180f47959a066795cc0f409433023af448bb0328Richard Smith QualType Type = 2436180f47959a066795cc0f409433023af448bb0328Richard Smith E->getSubExpr()->getType()->castAs<PointerType>()->getPointeeType(); 24375c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 2438180f47959a066795cc0f409433023af448bb0328Richard Smith for (CastExpr::path_const_iterator PathI = E->path_begin(), 24395c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson PathE = E->path_end(); PathI != PathE; ++PathI) { 2440180f47959a066795cc0f409433023af448bb0328Richard Smith if (!HandleLValueBase(Info, Result, Type->getAsCXXRecordDecl(), *PathI)) 24415c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return false; 2442180f47959a066795cc0f409433023af448bb0328Richard Smith Type = (*PathI)->getType(); 24435c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson } 24445c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 24455c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return true; 24465c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson } 24475c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 2448e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case CK_BaseToDerived: 2449e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!Visit(E->getSubExpr())) 2450e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2451e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!Result.Base && Result.Offset.isZero()) 2452e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 2453e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return HandleBaseToDerivedCast(Info, E, Result); 2454e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 245547a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith case CK_NullToPointer: 245647a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith return ValueInitialization(E); 2457404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall 24582de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_IntegralToPointer: { 2459c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith CCEDiag(E, diag::note_constexpr_invalid_cast) << 2; 2460c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith 246147a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue Value; 2462efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateIntegerOrLValue(SubExpr, Value, Info)) 246309a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 246469ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 2465efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (Value.isInt()) { 246647a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith unsigned Size = Info.Ctx.getTypeSize(E->getType()); 246747a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith uint64_t N = Value.getInt().extOrTrunc(Size).getZExtValue(); 24681bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith Result.Base = (Expr*)0; 246947a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith Result.Offset = CharUnits::fromQuantity(N); 2470177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith Result.Frame = 0; 24710a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Result.Designator.setInvalid(); 2472efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 2473efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else { 2474efdb83e26f9a1fd2566afe54461216cd84814d42John McCall // Cast is of an lvalue, no need to change value. 247547a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith Result.setFrom(Value); 2476efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 2477650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 2478650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 24792de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_ArrayToPointerDecay: 2480e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (SubExpr->isGLValue()) { 2481e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!EvaluateLValue(SubExpr, Result, Info)) 2482e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2483e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } else { 2484e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result.set(SubExpr, Info.CurrentCall); 2485e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!EvaluateConstantExpression(Info.CurrentCall->Temporaries[SubExpr], 2486e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Info, Result, SubExpr)) 2487e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2488e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 24890a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith // The result is a pointer to the first element of the array. 24900a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith Result.Designator.addIndex(0); 24910a3bdb646ee0318667f4cebec6792d2548fb9950Richard Smith return true; 24926a7c94af983717e2c2d6aebe42cb4737c1c7b9e6Richard Smith 24932de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_FunctionToPointerDecay: 24946a7c94af983717e2c2d6aebe42cb4737c1c7b9e6Richard Smith return EvaluateLValue(SubExpr, Result, Info); 24954efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 24964efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2497c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return ExprEvaluatorBaseTy::VisitCastExpr(E); 24981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 2499650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 25008cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool PointerExprEvaluator::VisitCallExpr(const CallExpr *E) { 2501180f47959a066795cc0f409433023af448bb0328Richard Smith if (IsStringLiteralCall(E)) 2502efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 250356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 25048cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitCallExpr(E); 25054efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 2506f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 2507f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 2508e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith// Member Pointer Evaluation 2509e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith//===----------------------------------------------------------------------===// 2510e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2511e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithnamespace { 2512e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithclass MemberPointerExprEvaluator 2513e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith : public ExprEvaluatorBase<MemberPointerExprEvaluator, bool> { 2514e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MemberPtr &Result; 2515e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2516e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool Success(const ValueDecl *D) { 2517e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result = MemberPtr(D); 2518e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 2519e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2520e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithpublic: 2521e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2522e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MemberPointerExprEvaluator(EvalInfo &Info, MemberPtr &Result) 2523e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith : ExprEvaluatorBaseTy(Info), Result(Result) {} 2524e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2525e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool Success(const CCValue &V, const Expr *E) { 2526e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result.setFrom(V); 2527e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 2528e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2529e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool ValueInitialization(const Expr *E) { 2530e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return Success((const ValueDecl*)0); 2531e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2532e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2533e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool VisitCastExpr(const CastExpr *E); 2534e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool VisitUnaryAddrOf(const UnaryOperator *E); 2535e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith}; 2536e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} // end anonymous namespace 2537e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2538e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithstatic bool EvaluateMemberPointer(const Expr *E, MemberPtr &Result, 2539e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith EvalInfo &Info) { 2540e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith assert(E->isRValue() && E->getType()->isMemberPointerType()); 2541e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return MemberPointerExprEvaluator(Info, Result).Visit(E); 2542e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} 2543e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2544e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithbool MemberPointerExprEvaluator::VisitCastExpr(const CastExpr *E) { 2545e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith switch (E->getCastKind()) { 2546e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith default: 2547e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return ExprEvaluatorBaseTy::VisitCastExpr(E); 2548e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2549e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case CK_NullToMemberPointer: 2550e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return ValueInitialization(E); 2551e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2552e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case CK_BaseToDerivedMemberPointer: { 2553e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!Visit(E->getSubExpr())) 2554e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2555e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (E->path_empty()) 2556e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 2557e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // Base-to-derived member pointer casts store the path in derived-to-base 2558e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // order, so iterate backwards. The CXXBaseSpecifier also provides us with 2559e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // the wrong end of the derived->base arc, so stagger the path by one class. 2560e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith typedef std::reverse_iterator<CastExpr::path_const_iterator> ReverseIter; 2561e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith for (ReverseIter PathI(E->path_end() - 1), PathE(E->path_begin()); 2562e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith PathI != PathE; ++PathI) { 2563e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith assert(!(*PathI)->isVirtual() && "memptr cast through vbase"); 2564e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *Derived = (*PathI)->getType()->getAsCXXRecordDecl(); 2565e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!Result.castToDerived(Derived)) 2566f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 2567e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2568e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const Type *FinalTy = E->getType()->castAs<MemberPointerType>()->getClass(); 2569e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!Result.castToDerived(FinalTy->getAsCXXRecordDecl())) 2570f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 2571e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 2572e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2573e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2574e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case CK_DerivedToBaseMemberPointer: 2575e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!Visit(E->getSubExpr())) 2576e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 2577e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith for (CastExpr::path_const_iterator PathI = E->path_begin(), 2578e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith PathE = E->path_end(); PathI != PathE; ++PathI) { 2579e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith assert(!(*PathI)->isVirtual() && "memptr cast through vbase"); 2580e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXRecordDecl *Base = (*PathI)->getType()->getAsCXXRecordDecl(); 2581e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!Result.castToBase(Base)) 2582f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 2583e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2584e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 2585e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2586e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} 2587e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2588e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithbool MemberPointerExprEvaluator::VisitUnaryAddrOf(const UnaryOperator *E) { 2589e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // C++11 [expr.unary.op]p3 has very strict rules on how the address of a 2590e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // member can be formed. 2591e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return Success(cast<DeclRefExpr>(E->getSubExpr())->getDecl()); 2592e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} 2593e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2594e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith//===----------------------------------------------------------------------===// 2595180f47959a066795cc0f409433023af448bb0328Richard Smith// Record Evaluation 2596180f47959a066795cc0f409433023af448bb0328Richard Smith//===----------------------------------------------------------------------===// 2597180f47959a066795cc0f409433023af448bb0328Richard Smith 2598180f47959a066795cc0f409433023af448bb0328Richard Smithnamespace { 2599180f47959a066795cc0f409433023af448bb0328Richard Smith class RecordExprEvaluator 2600180f47959a066795cc0f409433023af448bb0328Richard Smith : public ExprEvaluatorBase<RecordExprEvaluator, bool> { 2601180f47959a066795cc0f409433023af448bb0328Richard Smith const LValue &This; 2602180f47959a066795cc0f409433023af448bb0328Richard Smith APValue &Result; 2603180f47959a066795cc0f409433023af448bb0328Richard Smith public: 2604180f47959a066795cc0f409433023af448bb0328Richard Smith 2605180f47959a066795cc0f409433023af448bb0328Richard Smith RecordExprEvaluator(EvalInfo &info, const LValue &This, APValue &Result) 2606180f47959a066795cc0f409433023af448bb0328Richard Smith : ExprEvaluatorBaseTy(info), This(This), Result(Result) {} 2607180f47959a066795cc0f409433023af448bb0328Richard Smith 2608180f47959a066795cc0f409433023af448bb0328Richard Smith bool Success(const CCValue &V, const Expr *E) { 2609f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return CheckConstantExpression(Info, E, V, Result); 2610180f47959a066795cc0f409433023af448bb0328Richard Smith } 2611180f47959a066795cc0f409433023af448bb0328Richard Smith 261259efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith bool VisitCastExpr(const CastExpr *E); 2613180f47959a066795cc0f409433023af448bb0328Richard Smith bool VisitInitListExpr(const InitListExpr *E); 2614180f47959a066795cc0f409433023af448bb0328Richard Smith bool VisitCXXConstructExpr(const CXXConstructExpr *E); 2615180f47959a066795cc0f409433023af448bb0328Richard Smith }; 2616180f47959a066795cc0f409433023af448bb0328Richard Smith} 2617180f47959a066795cc0f409433023af448bb0328Richard Smith 261859efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smithbool RecordExprEvaluator::VisitCastExpr(const CastExpr *E) { 261959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith switch (E->getCastKind()) { 262059efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith default: 262159efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith return ExprEvaluatorBaseTy::VisitCastExpr(E); 262259efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 262359efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith case CK_ConstructorConversion: 262459efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith return Visit(E->getSubExpr()); 262559efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 262659efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith case CK_DerivedToBase: 262759efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith case CK_UncheckedDerivedToBase: { 262859efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith CCValue DerivedObject; 2629f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!Evaluate(DerivedObject, Info, E->getSubExpr())) 263059efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith return false; 2631f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!DerivedObject.isStruct()) 2632f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E->getSubExpr()); 263359efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 263459efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith // Derived-to-base rvalue conversion: just slice off the derived part. 263559efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith APValue *Value = &DerivedObject; 263659efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith const CXXRecordDecl *RD = E->getSubExpr()->getType()->getAsCXXRecordDecl(); 263759efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith for (CastExpr::path_const_iterator PathI = E->path_begin(), 263859efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith PathE = E->path_end(); PathI != PathE; ++PathI) { 263959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith assert(!(*PathI)->isVirtual() && "record rvalue with virtual base"); 264059efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith const CXXRecordDecl *Base = (*PathI)->getType()->getAsCXXRecordDecl(); 264159efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith Value = &Value->getStructBase(getBaseIndex(RD, Base)); 264259efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith RD = Base; 264359efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith } 264459efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith Result = *Value; 264559efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith return true; 264659efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith } 264759efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith } 264859efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith} 264959efe266b804330f4c1f3a1b0ff783e67dd90378Richard Smith 2650180f47959a066795cc0f409433023af448bb0328Richard Smithbool RecordExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 2651180f47959a066795cc0f409433023af448bb0328Richard Smith const RecordDecl *RD = E->getType()->castAs<RecordType>()->getDecl(); 2652180f47959a066795cc0f409433023af448bb0328Richard Smith const ASTRecordLayout &Layout = Info.Ctx.getASTRecordLayout(RD); 2653180f47959a066795cc0f409433023af448bb0328Richard Smith 2654180f47959a066795cc0f409433023af448bb0328Richard Smith if (RD->isUnion()) { 2655180f47959a066795cc0f409433023af448bb0328Richard Smith Result = APValue(E->getInitializedFieldInUnion()); 2656180f47959a066795cc0f409433023af448bb0328Richard Smith if (!E->getNumInits()) 2657180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 2658180f47959a066795cc0f409433023af448bb0328Richard Smith LValue Subobject = This; 2659180f47959a066795cc0f409433023af448bb0328Richard Smith HandleLValueMember(Info, Subobject, E->getInitializedFieldInUnion(), 2660180f47959a066795cc0f409433023af448bb0328Richard Smith &Layout); 2661180f47959a066795cc0f409433023af448bb0328Richard Smith return EvaluateConstantExpression(Result.getUnionValue(), Info, 2662180f47959a066795cc0f409433023af448bb0328Richard Smith Subobject, E->getInit(0)); 2663180f47959a066795cc0f409433023af448bb0328Richard Smith } 2664180f47959a066795cc0f409433023af448bb0328Richard Smith 2665180f47959a066795cc0f409433023af448bb0328Richard Smith assert((!isa<CXXRecordDecl>(RD) || !cast<CXXRecordDecl>(RD)->getNumBases()) && 2666180f47959a066795cc0f409433023af448bb0328Richard Smith "initializer list for class with base classes"); 2667180f47959a066795cc0f409433023af448bb0328Richard Smith Result = APValue(APValue::UninitStruct(), 0, 2668180f47959a066795cc0f409433023af448bb0328Richard Smith std::distance(RD->field_begin(), RD->field_end())); 2669180f47959a066795cc0f409433023af448bb0328Richard Smith unsigned ElementNo = 0; 2670180f47959a066795cc0f409433023af448bb0328Richard Smith for (RecordDecl::field_iterator Field = RD->field_begin(), 2671180f47959a066795cc0f409433023af448bb0328Richard Smith FieldEnd = RD->field_end(); Field != FieldEnd; ++Field) { 2672180f47959a066795cc0f409433023af448bb0328Richard Smith // Anonymous bit-fields are not considered members of the class for 2673180f47959a066795cc0f409433023af448bb0328Richard Smith // purposes of aggregate initialization. 2674180f47959a066795cc0f409433023af448bb0328Richard Smith if (Field->isUnnamedBitfield()) 2675180f47959a066795cc0f409433023af448bb0328Richard Smith continue; 2676180f47959a066795cc0f409433023af448bb0328Richard Smith 2677180f47959a066795cc0f409433023af448bb0328Richard Smith LValue Subobject = This; 2678180f47959a066795cc0f409433023af448bb0328Richard Smith HandleLValueMember(Info, Subobject, *Field, &Layout); 2679180f47959a066795cc0f409433023af448bb0328Richard Smith 2680180f47959a066795cc0f409433023af448bb0328Richard Smith if (ElementNo < E->getNumInits()) { 2681180f47959a066795cc0f409433023af448bb0328Richard Smith if (!EvaluateConstantExpression( 2682180f47959a066795cc0f409433023af448bb0328Richard Smith Result.getStructField((*Field)->getFieldIndex()), 2683180f47959a066795cc0f409433023af448bb0328Richard Smith Info, Subobject, E->getInit(ElementNo++))) 2684180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 2685180f47959a066795cc0f409433023af448bb0328Richard Smith } else { 2686180f47959a066795cc0f409433023af448bb0328Richard Smith // Perform an implicit value-initialization for members beyond the end of 2687180f47959a066795cc0f409433023af448bb0328Richard Smith // the initializer list. 2688180f47959a066795cc0f409433023af448bb0328Richard Smith ImplicitValueInitExpr VIE(Field->getType()); 2689180f47959a066795cc0f409433023af448bb0328Richard Smith if (!EvaluateConstantExpression( 2690180f47959a066795cc0f409433023af448bb0328Richard Smith Result.getStructField((*Field)->getFieldIndex()), 2691180f47959a066795cc0f409433023af448bb0328Richard Smith Info, Subobject, &VIE)) 2692180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 2693180f47959a066795cc0f409433023af448bb0328Richard Smith } 2694180f47959a066795cc0f409433023af448bb0328Richard Smith } 2695180f47959a066795cc0f409433023af448bb0328Richard Smith 2696180f47959a066795cc0f409433023af448bb0328Richard Smith return true; 2697180f47959a066795cc0f409433023af448bb0328Richard Smith} 2698180f47959a066795cc0f409433023af448bb0328Richard Smith 2699180f47959a066795cc0f409433023af448bb0328Richard Smithbool RecordExprEvaluator::VisitCXXConstructExpr(const CXXConstructExpr *E) { 2700180f47959a066795cc0f409433023af448bb0328Richard Smith const CXXConstructorDecl *FD = E->getConstructor(); 2701180f47959a066795cc0f409433023af448bb0328Richard Smith const FunctionDecl *Definition = 0; 2702180f47959a066795cc0f409433023af448bb0328Richard Smith FD->getBody(Definition); 2703180f47959a066795cc0f409433023af448bb0328Richard Smith 2704c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (!CheckConstexprFunction(Info, E->getExprLoc(), FD, Definition)) 2705c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return false; 2706180f47959a066795cc0f409433023af448bb0328Richard Smith 2707180f47959a066795cc0f409433023af448bb0328Richard Smith // FIXME: Elide the copy/move construction wherever we can. 2708180f47959a066795cc0f409433023af448bb0328Richard Smith if (E->isElidable()) 2709180f47959a066795cc0f409433023af448bb0328Richard Smith if (const MaterializeTemporaryExpr *ME 2710180f47959a066795cc0f409433023af448bb0328Richard Smith = dyn_cast<MaterializeTemporaryExpr>(E->getArg(0))) 2711180f47959a066795cc0f409433023af448bb0328Richard Smith return Visit(ME->GetTemporaryExpr()); 2712180f47959a066795cc0f409433023af448bb0328Richard Smith 2713180f47959a066795cc0f409433023af448bb0328Richard Smith llvm::ArrayRef<const Expr*> Args(E->getArgs(), E->getNumArgs()); 2714f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return HandleConstructorCall(E, This, Args, 2715f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith cast<CXXConstructorDecl>(Definition), Info, 2716f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith Result); 2717180f47959a066795cc0f409433023af448bb0328Richard Smith} 2718180f47959a066795cc0f409433023af448bb0328Richard Smith 2719180f47959a066795cc0f409433023af448bb0328Richard Smithstatic bool EvaluateRecord(const Expr *E, const LValue &This, 2720180f47959a066795cc0f409433023af448bb0328Richard Smith APValue &Result, EvalInfo &Info) { 2721180f47959a066795cc0f409433023af448bb0328Richard Smith assert(E->isRValue() && E->getType()->isRecordType() && 2722180f47959a066795cc0f409433023af448bb0328Richard Smith E->getType()->isLiteralType() && 2723180f47959a066795cc0f409433023af448bb0328Richard Smith "can't evaluate expression as a record rvalue"); 2724180f47959a066795cc0f409433023af448bb0328Richard Smith return RecordExprEvaluator(Info, This, Result).Visit(E); 2725180f47959a066795cc0f409433023af448bb0328Richard Smith} 2726180f47959a066795cc0f409433023af448bb0328Richard Smith 2727180f47959a066795cc0f409433023af448bb0328Richard Smith//===----------------------------------------------------------------------===// 2728e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith// Temporary Evaluation 2729e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith// 2730e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith// Temporaries are represented in the AST as rvalues, but generally behave like 2731e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith// lvalues. The full-object of which the temporary is a subobject is implicitly 2732e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith// materialized so that a reference can bind to it. 2733e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith//===----------------------------------------------------------------------===// 2734e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithnamespace { 2735e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithclass TemporaryExprEvaluator 2736e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith : public LValueExprEvaluatorBase<TemporaryExprEvaluator> { 2737e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithpublic: 2738e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith TemporaryExprEvaluator(EvalInfo &Info, LValue &Result) : 2739e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LValueExprEvaluatorBaseTy(Info, Result) {} 2740e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2741e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith /// Visit an expression which constructs the value of this temporary. 2742e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool VisitConstructExpr(const Expr *E) { 2743e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result.set(E, Info.CurrentCall); 2744e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return EvaluateConstantExpression(Info.CurrentCall->Temporaries[E], Info, 2745e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result, E); 2746e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2747e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2748e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool VisitCastExpr(const CastExpr *E) { 2749e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith switch (E->getCastKind()) { 2750e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith default: 2751e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return LValueExprEvaluatorBaseTy::VisitCastExpr(E); 2752e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2753e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith case CK_ConstructorConversion: 2754e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return VisitConstructExpr(E->getSubExpr()); 2755e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2756e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2757e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool VisitInitListExpr(const InitListExpr *E) { 2758e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return VisitConstructExpr(E); 2759e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2760e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool VisitCXXConstructExpr(const CXXConstructExpr *E) { 2761e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return VisitConstructExpr(E); 2762e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2763e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool VisitCallExpr(const CallExpr *E) { 2764e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return VisitConstructExpr(E); 2765e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith } 2766e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith}; 2767e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} // end anonymous namespace 2768e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2769e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith/// Evaluate an expression of record type as a temporary. 2770e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithstatic bool EvaluateTemporary(const Expr *E, LValue &Result, EvalInfo &Info) { 2771af2c7a194592401394233b7cbcdd3cfd0a7a38ddRichard Smith assert(E->isRValue() && E->getType()->isRecordType()); 2772af2c7a194592401394233b7cbcdd3cfd0a7a38ddRichard Smith if (!E->getType()->isLiteralType()) { 2773af2c7a194592401394233b7cbcdd3cfd0a7a38ddRichard Smith if (Info.getLangOpts().CPlusPlus0x) 2774af2c7a194592401394233b7cbcdd3cfd0a7a38ddRichard Smith Info.Diag(E->getExprLoc(), diag::note_constexpr_nonliteral) 2775af2c7a194592401394233b7cbcdd3cfd0a7a38ddRichard Smith << E->getType(); 2776af2c7a194592401394233b7cbcdd3cfd0a7a38ddRichard Smith else 2777af2c7a194592401394233b7cbcdd3cfd0a7a38ddRichard Smith Info.Diag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 2778af2c7a194592401394233b7cbcdd3cfd0a7a38ddRichard Smith return false; 2779af2c7a194592401394233b7cbcdd3cfd0a7a38ddRichard Smith } 2780e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return TemporaryExprEvaluator(Info, Result).Visit(E); 2781e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} 2782e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 2783e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith//===----------------------------------------------------------------------===// 278459b5da6d853b4368b984700315adf7b37de05764Nate Begeman// Vector Evaluation 278559b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 278659b5da6d853b4368b984700315adf7b37de05764Nate Begeman 278759b5da6d853b4368b984700315adf7b37de05764Nate Begemannamespace { 2788770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramer class VectorExprEvaluator 278907fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith : public ExprEvaluatorBase<VectorExprEvaluator, bool> { 279007fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith APValue &Result; 279159b5da6d853b4368b984700315adf7b37de05764Nate Begeman public: 27921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 279307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith VectorExprEvaluator(EvalInfo &info, APValue &Result) 279407fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith : ExprEvaluatorBaseTy(info), Result(Result) {} 27951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 279607fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool Success(const ArrayRef<APValue> &V, const Expr *E) { 279707fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith assert(V.size() == E->getType()->castAs<VectorType>()->getNumElements()); 279807fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith // FIXME: remove this APValue copy. 279907fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith Result = APValue(V.data(), V.size()); 280007fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return true; 280107fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith } 280269c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith bool Success(const CCValue &V, const Expr *E) { 280369c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith assert(V.isVector()); 280407fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith Result = V; 280507fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return true; 280607fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith } 280707fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool ValueInitialization(const Expr *E); 28081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 280907fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool VisitUnaryReal(const UnaryOperator *E) 281091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 281107fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool VisitCastExpr(const CastExpr* E); 281207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool VisitInitListExpr(const InitListExpr *E); 281307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool VisitUnaryImag(const UnaryOperator *E); 281491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // FIXME: Missing: unary -, unary ~, binary add/sub/mul/div, 28152217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // binary comparisons, binary and/or/xor, 281691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // shufflevector, ExtVectorElementExpr 281791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // (Note that these require implementing conversions 281891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // between vector types.) 281959b5da6d853b4368b984700315adf7b37de05764Nate Begeman }; 282059b5da6d853b4368b984700315adf7b37de05764Nate Begeman} // end anonymous namespace 282159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 282259b5da6d853b4368b984700315adf7b37de05764Nate Begemanstatic bool EvaluateVector(const Expr* E, APValue& Result, EvalInfo &Info) { 2823c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith assert(E->isRValue() && E->getType()->isVectorType() &&"not a vector rvalue"); 282407fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return VectorExprEvaluator(Info, Result).Visit(E); 282559b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 282659b5da6d853b4368b984700315adf7b37de05764Nate Begeman 282707fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smithbool VectorExprEvaluator::VisitCastExpr(const CastExpr* E) { 282807fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith const VectorType *VTy = E->getType()->castAs<VectorType>(); 2829c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned NElts = VTy->getNumElements(); 28301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2831d62ca370b03b8c6ad58002d3399383baf744e32bRichard Smith const Expr *SE = E->getSubExpr(); 2832e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman QualType SETy = SE->getType(); 283359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 283446a523285928aa07bf14803178dc04616ac85994Eli Friedman switch (E->getCastKind()) { 283546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_VectorSplat: { 283607fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith APValue Val = APValue(); 283746a523285928aa07bf14803178dc04616ac85994Eli Friedman if (SETy->isIntegerType()) { 283846a523285928aa07bf14803178dc04616ac85994Eli Friedman APSInt IntResult; 283946a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!EvaluateInteger(SE, IntResult, Info)) 2840f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 284107fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith Val = APValue(IntResult); 284246a523285928aa07bf14803178dc04616ac85994Eli Friedman } else if (SETy->isRealFloatingType()) { 284346a523285928aa07bf14803178dc04616ac85994Eli Friedman APFloat F(0.0); 284446a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!EvaluateFloat(SE, F, Info)) 2845f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 284607fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith Val = APValue(F); 284746a523285928aa07bf14803178dc04616ac85994Eli Friedman } else { 284807fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Error(E); 284946a523285928aa07bf14803178dc04616ac85994Eli Friedman } 2850c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 2851c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // Splat and create vector APValue. 285207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith SmallVector<APValue, 4> Elts(NElts, Val); 285307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Success(Elts, E); 2854e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } 285546a523285928aa07bf14803178dc04616ac85994Eli Friedman default: 2856c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return ExprEvaluatorBaseTy::VisitCastExpr(E); 2857c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman } 285859b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 285959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 286007fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smithbool 286159b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 286207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith const VectorType *VT = E->getType()->castAs<VectorType>(); 286359b5da6d853b4368b984700315adf7b37de05764Nate Begeman unsigned NumInits = E->getNumInits(); 286491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman unsigned NumElements = VT->getNumElements(); 28651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 286659b5da6d853b4368b984700315adf7b37de05764Nate Begeman QualType EltTy = VT->getElementType(); 28675f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<APValue, 4> Elements; 286859b5da6d853b4368b984700315adf7b37de05764Nate Begeman 2869a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // If a vector is initialized with a single element, that value 2870a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // becomes every element of the vector, not just the first. 2871a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // This is the behavior described in the IBM AltiVec documentation. 2872a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (NumInits == 1) { 287307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith 287407fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith // Handle the case where the vector is initialized by another 2875b92ae0e31126e5630d7022f2d6abe7eed2e17746Tanya Lattner // vector (OpenCL 6.1.6). 2876b92ae0e31126e5630d7022f2d6abe7eed2e17746Tanya Lattner if (E->getInit(0)->getType()->isVectorType()) 287707fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Visit(E->getInit(0)); 287807fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith 2879a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall APValue InitValue; 288059b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (EltTy->isIntegerType()) { 288159b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APSInt sInt(32); 2882a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(0), sInt, Info)) 2883f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 2884a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(sInt); 288559b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else { 288659b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APFloat f(0.0); 2887a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(0), f, Info)) 2888f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 2889a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(f); 2890a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 2891a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 2892a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(InitValue); 2893a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 2894a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 2895a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 2896a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (EltTy->isIntegerType()) { 2897a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APSInt sInt(32); 2898a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 2899a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(i), sInt, Info)) 2900f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 2901a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 2902a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall sInt = Info.Ctx.MakeIntValue(0, EltTy); 2903a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 2904a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(sInt)); 290591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 2906a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APFloat f(0.0); 2907a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 2908a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(i), f, Info)) 2909f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 2910a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 2911a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall f = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy)); 2912a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 2913a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(f)); 291491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 291559b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 291659b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 291707fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Success(Elements, E); 291859b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 291959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 292007fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smithbool 292107fc657e3077531805b0e2dbf8f8964d48daa38bRichard SmithVectorExprEvaluator::ValueInitialization(const Expr *E) { 292207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith const VectorType *VT = E->getType()->getAs<VectorType>(); 292391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman QualType EltTy = VT->getElementType(); 292491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue ZeroElement; 292591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EltTy->isIntegerType()) 292691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = APValue(Info.Ctx.MakeIntValue(0, EltTy)); 292791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman else 292891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = 292991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue(APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy))); 293091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 29315f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<APValue, 4> Elements(VT->getNumElements(), ZeroElement); 293207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Success(Elements, E); 293391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 293491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 293507fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smithbool VectorExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 29368327fad71da34492d82c532f42a58cb4baff81a3Richard Smith VisitIgnoredValue(E->getSubExpr()); 293707fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return ValueInitialization(E); 293891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 293991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 294059b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 2941cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith// Array Evaluation 2942cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith//===----------------------------------------------------------------------===// 2943cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 2944cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smithnamespace { 2945cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith class ArrayExprEvaluator 2946cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith : public ExprEvaluatorBase<ArrayExprEvaluator, bool> { 2947180f47959a066795cc0f409433023af448bb0328Richard Smith const LValue &This; 2948cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith APValue &Result; 2949cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith public: 2950cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 2951180f47959a066795cc0f409433023af448bb0328Richard Smith ArrayExprEvaluator(EvalInfo &Info, const LValue &This, APValue &Result) 2952180f47959a066795cc0f409433023af448bb0328Richard Smith : ExprEvaluatorBaseTy(Info), This(This), Result(Result) {} 2953cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 2954cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith bool Success(const APValue &V, const Expr *E) { 2955cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith assert(V.isArray() && "Expected array type"); 2956cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith Result = V; 2957cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith return true; 2958cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith } 2959cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 2960180f47959a066795cc0f409433023af448bb0328Richard Smith bool ValueInitialization(const Expr *E) { 2961180f47959a066795cc0f409433023af448bb0328Richard Smith const ConstantArrayType *CAT = 2962180f47959a066795cc0f409433023af448bb0328Richard Smith Info.Ctx.getAsConstantArrayType(E->getType()); 2963180f47959a066795cc0f409433023af448bb0328Richard Smith if (!CAT) 2964f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 2965180f47959a066795cc0f409433023af448bb0328Richard Smith 2966180f47959a066795cc0f409433023af448bb0328Richard Smith Result = APValue(APValue::UninitArray(), 0, 2967180f47959a066795cc0f409433023af448bb0328Richard Smith CAT->getSize().getZExtValue()); 2968180f47959a066795cc0f409433023af448bb0328Richard Smith if (!Result.hasArrayFiller()) return true; 2969180f47959a066795cc0f409433023af448bb0328Richard Smith 2970180f47959a066795cc0f409433023af448bb0328Richard Smith // Value-initialize all elements. 2971180f47959a066795cc0f409433023af448bb0328Richard Smith LValue Subobject = This; 2972180f47959a066795cc0f409433023af448bb0328Richard Smith Subobject.Designator.addIndex(0); 2973180f47959a066795cc0f409433023af448bb0328Richard Smith ImplicitValueInitExpr VIE(CAT->getElementType()); 2974180f47959a066795cc0f409433023af448bb0328Richard Smith return EvaluateConstantExpression(Result.getArrayFiller(), Info, 2975180f47959a066795cc0f409433023af448bb0328Richard Smith Subobject, &VIE); 2976180f47959a066795cc0f409433023af448bb0328Richard Smith } 2977180f47959a066795cc0f409433023af448bb0328Richard Smith 2978cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith bool VisitInitListExpr(const InitListExpr *E); 2979e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith bool VisitCXXConstructExpr(const CXXConstructExpr *E); 2980cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith }; 2981cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith} // end anonymous namespace 2982cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 2983180f47959a066795cc0f409433023af448bb0328Richard Smithstatic bool EvaluateArray(const Expr *E, const LValue &This, 2984180f47959a066795cc0f409433023af448bb0328Richard Smith APValue &Result, EvalInfo &Info) { 2985cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith assert(E->isRValue() && E->getType()->isArrayType() && 2986cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith E->getType()->isLiteralType() && "not a literal array rvalue"); 2987180f47959a066795cc0f409433023af448bb0328Richard Smith return ArrayExprEvaluator(Info, This, Result).Visit(E); 2988cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith} 2989cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 2990cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smithbool ArrayExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 2991cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith const ConstantArrayType *CAT = Info.Ctx.getAsConstantArrayType(E->getType()); 2992cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith if (!CAT) 2993f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 2994cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 2995cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith Result = APValue(APValue::UninitArray(), E->getNumInits(), 2996cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith CAT->getSize().getZExtValue()); 2997180f47959a066795cc0f409433023af448bb0328Richard Smith LValue Subobject = This; 2998180f47959a066795cc0f409433023af448bb0328Richard Smith Subobject.Designator.addIndex(0); 2999180f47959a066795cc0f409433023af448bb0328Richard Smith unsigned Index = 0; 3000cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith for (InitListExpr::const_iterator I = E->begin(), End = E->end(); 3001180f47959a066795cc0f409433023af448bb0328Richard Smith I != End; ++I, ++Index) { 3002180f47959a066795cc0f409433023af448bb0328Richard Smith if (!EvaluateConstantExpression(Result.getArrayInitializedElt(Index), 3003180f47959a066795cc0f409433023af448bb0328Richard Smith Info, Subobject, cast<Expr>(*I))) 3004180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 3005180f47959a066795cc0f409433023af448bb0328Richard Smith if (!HandleLValueArrayAdjustment(Info, Subobject, CAT->getElementType(), 1)) 3006cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith return false; 3007180f47959a066795cc0f409433023af448bb0328Richard Smith } 3008cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 3009cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith if (!Result.hasArrayFiller()) return true; 3010cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith assert(E->hasArrayFiller() && "no array filler for incomplete init list"); 3011180f47959a066795cc0f409433023af448bb0328Richard Smith // FIXME: The Subobject here isn't necessarily right. This rarely matters, 3012180f47959a066795cc0f409433023af448bb0328Richard Smith // but sometimes does: 3013180f47959a066795cc0f409433023af448bb0328Richard Smith // struct S { constexpr S() : p(&p) {} void *p; }; 3014180f47959a066795cc0f409433023af448bb0328Richard Smith // S s[10] = {}; 3015cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith return EvaluateConstantExpression(Result.getArrayFiller(), Info, 3016180f47959a066795cc0f409433023af448bb0328Richard Smith Subobject, E->getArrayFiller()); 3017cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith} 3018cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 3019e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smithbool ArrayExprEvaluator::VisitCXXConstructExpr(const CXXConstructExpr *E) { 3020e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const ConstantArrayType *CAT = Info.Ctx.getAsConstantArrayType(E->getType()); 3021e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!CAT) 3022f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 3023e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 3024e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Result = APValue(APValue::UninitArray(), 0, CAT->getSize().getZExtValue()); 3025e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!Result.hasArrayFiller()) 3026e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 3027e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 3028e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const CXXConstructorDecl *FD = E->getConstructor(); 3029e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith const FunctionDecl *Definition = 0; 3030e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith FD->getBody(Definition); 3031e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 3032c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (!CheckConstexprFunction(Info, E->getExprLoc(), FD, Definition)) 3033c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return false; 3034e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 3035e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // FIXME: The Subobject here isn't necessarily right. This rarely matters, 3036e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // but sometimes does: 3037e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // struct S { constexpr S() : p(&p) {} void *p; }; 3038e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // S s[10]; 3039e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith LValue Subobject = This; 3040e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Subobject.Designator.addIndex(0); 3041e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith llvm::ArrayRef<const Expr*> Args(E->getArgs(), E->getNumArgs()); 3042f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return HandleConstructorCall(E, Subobject, Args, 3043e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith cast<CXXConstructorDecl>(Definition), 3044e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith Info, Result.getArrayFiller()); 3045e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith} 3046e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith 3047cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith//===----------------------------------------------------------------------===// 3048f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Integer Evaluation 3049c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// 3050c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// As a GNU extension, we support casting pointers to sufficiently-wide integer 3051c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// types and back in constant folding. Integer values are thus represented 3052c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith// either as an integer-valued APValue, or as an lvalue-valued APValue. 3053f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 3054f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 3055f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnernamespace { 3056770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass IntExprEvaluator 30578cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<IntExprEvaluator, bool> { 305847a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue &Result; 3059f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerpublic: 306047a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith IntExprEvaluator(EvalInfo &info, CCValue &result) 30618cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(result) {} 3062f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 3063973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara bool Success(const llvm::APSInt &SI, const Expr *E) { 3064973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara assert(E->getType()->isIntegralOrEnumerationType() && 30652ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 3066973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara assert(SI.isSigned() == E->getType()->isSignedIntegerOrEnumerationType() && 30673f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 3068973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara assert(SI.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 30693f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 307047a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith Result = CCValue(SI); 30713f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 30723f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 30733f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 3074131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(const llvm::APInt &I, const Expr *E) { 30752ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 30762ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 307730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(I.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 30783f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 307947a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith Result = CCValue(APSInt(I)); 3080575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor Result.getInt().setIsUnsigned( 3081575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor E->getType()->isUnsignedIntegerOrEnumerationType()); 3082131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 3083131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 3084131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 3085131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(uint64_t Value, const Expr *E) { 30862ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 30872ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 308847a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith Result = CCValue(Info.Ctx.MakeIntValue(Value, E->getType())); 3089131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 3090131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 3091131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 30924f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck bool Success(CharUnits Size, const Expr *E) { 30934f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(Size.getQuantity(), E); 30944f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck } 30954f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck 309647a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith bool Success(const CCValue &V, const Expr *E) { 3097342f1f8b0a402c5a7f8c5055db7f60a7808f1687Richard Smith if (V.isLValue()) { 3098342f1f8b0a402c5a7f8c5055db7f60a7808f1687Richard Smith Result = V; 3099342f1f8b0a402c5a7f8c5055db7f60a7808f1687Richard Smith return true; 3100342f1f8b0a402c5a7f8c5055db7f60a7808f1687Richard Smith } 31018cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Success(V.getInt(), E); 310232fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 31031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3104f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith bool ValueInitialization(const Expr *E) { return Success(0, E); } 3105f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith 31068cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 31078cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne // Visitor Methods 31088cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 3109f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 31104c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitIntegerLiteral(const IntegerLiteral *E) { 3111131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 31124c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 31134c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCharacterLiteral(const CharacterLiteral *E) { 3114131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 31154c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 3116043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 3117043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool CheckReferencedDecl(const Expr *E, const Decl *D); 3118043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitDeclRefExpr(const DeclRefExpr *E) { 31198cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (CheckReferencedDecl(E, E->getDecl())) 31208cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 31218cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 31228cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitDeclRefExpr(E); 3123043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 3124043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitMemberExpr(const MemberExpr *E) { 3125043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (CheckReferencedDecl(E, E->getMemberDecl())) { 3126c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith VisitIgnoredValue(E->getBase()); 3127043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return true; 3128043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 31298cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 31308cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitMemberExpr(E); 3131043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 3132043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 31338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCallExpr(const CallExpr *E); 3134b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitBinaryOperator(const BinaryOperator *E); 31358ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor bool VisitOffsetOfExpr(const OffsetOfExpr *E); 3136b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitUnaryOperator(const UnaryOperator *E); 3137f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 31388cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr* E); 3139f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne bool VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *E); 31400518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 31413068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 3142131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 31433068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 31441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3145f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith // Note, GNU defines __null as an integer, not a pointer. 31463f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson bool VisitGNUNullExpr(const GNUNullExpr *E) { 3147f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return ValueInitialization(E); 3148664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman } 3149664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 315064b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) { 31510dfd848fa4c9664852ba8c929a8bd3fce93ddca2Sebastian Redl return Success(E->getValue(), E); 315264b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl } 315364b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl 31546ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet bool VisitBinaryTypeTraitExpr(const BinaryTypeTraitExpr *E) { 31556ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet return Success(E->getValue(), E); 31566ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet } 31576ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet 315821ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley bool VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *E) { 315921ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley return Success(E->getValue(), E); 316021ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley } 316121ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley 3162552622067dc45013d240f73952fece703f5e63bdJohn Wiegley bool VisitExpressionTraitExpr(const ExpressionTraitExpr *E) { 3163552622067dc45013d240f73952fece703f5e63bdJohn Wiegley return Success(E->getValue(), E); 3164552622067dc45013d240f73952fece703f5e63bdJohn Wiegley } 3165552622067dc45013d240f73952fece703f5e63bdJohn Wiegley 3166722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman bool VisitUnaryReal(const UnaryOperator *E); 3167664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitUnaryImag(const UnaryOperator *E); 3168664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 3169295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl bool VisitCXXNoexceptExpr(const CXXNoexceptExpr *E); 3170ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor bool VisitSizeOfPackExpr(const SizeOfPackExpr *E); 3171cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl 3172fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattnerprivate: 31738b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfExpr(const Expr *E); 31748b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfType(QualType T); 31751bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith static QualType GetObjectType(APValue::LValueBase B); 31768cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool TryEvaluateBuiltinObjectSize(const CallExpr *E); 3177664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman // FIXME: Missing: array subscript of vector, member of vector 3178f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner}; 3179f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 3180f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 3181c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// EvaluateIntegerOrLValue - Evaluate an rvalue integral-typed expression, and 3182c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// produce either the integer value or a pointer. 3183c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// 3184c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// GCC has a heinous extension which folds casts between pointer types and 3185c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// pointer-sized integral types. We support this by allowing the evaluation of 3186c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// an integer rvalue to produce a pointer (represented as an lvalue) instead. 3187c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// Some simple arithmetic on such values is supported (they are treated much 3188c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// like char*). 3189f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithstatic bool EvaluateIntegerOrLValue(const Expr *E, CCValue &Result, 319047a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith EvalInfo &Info) { 3191c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith assert(E->isRValue() && E->getType()->isIntegralOrEnumerationType()); 31928cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return IntExprEvaluator(Info, Result).Visit(E); 319369ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar} 319469ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 3195f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithstatic bool EvaluateInteger(const Expr *E, APSInt &Result, EvalInfo &Info) { 319647a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue Val; 3197f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!EvaluateIntegerOrLValue(E, Val, Info)) 3198f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 3199f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!Val.isInt()) { 3200f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // FIXME: It would be better to produce the diagnostic for casting 3201f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // a pointer to an integer. 3202dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 320330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 3204f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 320530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = Val.getInt(); 320630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return true; 3207f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 3208f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 3209f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith/// Check whether the given declaration can be directly converted to an integral 3210f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith/// rvalue. If not, no diagnostic is produced; there are other things we can 3211f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith/// try. 3212043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedmanbool IntExprEvaluator::CheckReferencedDecl(const Expr* E, const Decl* D) { 32134c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Enums are integer constant exprs. 3214bfbdcd861a4364bfc21a9e5047bdbd56812d6693Abramo Bagnara if (const EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(D)) { 3215973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara // Check for signedness/width mismatches between E type and ECD value. 3216973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara bool SameSign = (ECD->getInitVal().isSigned() 3217973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara == E->getType()->isSignedIntegerOrEnumerationType()); 3218973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara bool SameWidth = (ECD->getInitVal().getBitWidth() 3219973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara == Info.Ctx.getIntWidth(E->getType())); 3220973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara if (SameSign && SameWidth) 3221973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara return Success(ECD->getInitVal(), E); 3222973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara else { 3223973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara // Get rid of mismatch (otherwise Success assertions will fail) 3224973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara // by computing a new value matching the type of E. 3225973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara llvm::APSInt Val = ECD->getInitVal(); 3226973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara if (!SameSign) 3227973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara Val.setIsSigned(!ECD->getInitVal().isSigned()); 3228973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara if (!SameWidth) 3229973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara Val = Val.extOrTrunc(Info.Ctx.getIntWidth(E->getType())); 3230973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara return Success(Val, E); 3231973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara } 3232bfbdcd861a4364bfc21a9e5047bdbd56812d6693Abramo Bagnara } 32338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return false; 32344c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 32354c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner 3236a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way 3237a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// as GCC. 3238a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattnerstatic int EvaluateBuiltinClassifyType(const CallExpr *E) { 3239a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // The following enum mimics the values returned by GCC. 32407c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl // FIXME: Does GCC differ between lvalue and rvalue references here? 3241a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enum gcc_type_class { 3242a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner no_type_class = -1, 3243a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner void_type_class, integer_type_class, char_type_class, 3244a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enumeral_type_class, boolean_type_class, 3245a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner pointer_type_class, reference_type_class, offset_type_class, 3246a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner real_type_class, complex_type_class, 3247a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner function_type_class, method_type_class, 3248a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner record_type_class, union_type_class, 3249a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner array_type_class, string_type_class, 3250a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner lang_type_class 3251a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner }; 32521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 32531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If no argument was supplied, default to "no_type_class". This isn't 3254a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // ideal, however it is what gcc does. 3255a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (E->getNumArgs() == 0) 3256a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return no_type_class; 32571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3258a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner QualType ArgTy = E->getArg(0)->getType(); 3259a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (ArgTy->isVoidType()) 3260a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return void_type_class; 3261a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isEnumeralType()) 3262a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return enumeral_type_class; 3263a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isBooleanType()) 3264a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return boolean_type_class; 3265a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isCharType()) 3266a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return string_type_class; // gcc doesn't appear to use char_type_class 3267a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isIntegerType()) 3268a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return integer_type_class; 3269a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isPointerType()) 3270a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return pointer_type_class; 3271a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isReferenceType()) 3272a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return reference_type_class; 3273a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isRealType()) 3274a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return real_type_class; 3275a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isComplexType()) 3276a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return complex_type_class; 3277a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isFunctionType()) 3278a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return function_type_class; 3279fb87b89fc9eb103e19fb8e4b925c23f0bd091b99Douglas Gregor else if (ArgTy->isStructureOrClassType()) 3280a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return record_type_class; 3281a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 3282a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 3283a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isArrayType()) 3284a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return array_type_class; 3285a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 3286a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 3287a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else // FIXME: offset_type_class, method_type_class, & lang_type_class? 3288b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("CallExpr::isBuiltinClassifyType(): unimplemented type"); 3289a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return -1; 3290a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner} 3291a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 329242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// Retrieves the "underlying object type" of the given expression, 329342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// as used by __builtin_object_size. 32941bf9a9e6a5bdc0de7939908855dcddf46b661800Richard SmithQualType IntExprEvaluator::GetObjectType(APValue::LValueBase B) { 32951bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (const ValueDecl *D = B.dyn_cast<const ValueDecl*>()) { 32961bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 329742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return VD->getType(); 32981bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith } else if (const Expr *E = B.get<const Expr*>()) { 32991bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (isa<CompoundLiteralExpr>(E)) 33001bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith return E->getType(); 330142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } 330242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 330342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return QualType(); 330442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 330542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 33068cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::TryEvaluateBuiltinObjectSize(const CallExpr *E) { 330742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // TODO: Perhaps we should let LLVM lower this? 330842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall LValue Base; 330942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!EvaluatePointer(E->getArg(0), Base, Info)) 331042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 331142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 331242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // If we can prove the base is null, lower to zero now. 33131bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (!Base.getLValueBase()) return Success(0, E); 331442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 33151bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith QualType T = GetObjectType(Base.getLValueBase()); 331642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (T.isNull() || 331742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isIncompleteType() || 33181357869bc5983cdfbc986db1f3d18265bb34cb0eEli Friedman T->isFunctionType() || 331942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isVariablyModifiedType() || 332042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isDependentType()) 3321f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 332242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 332342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Size = Info.Ctx.getTypeSizeInChars(T); 332442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Offset = Base.getLValueOffset(); 332542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 332642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!Offset.isNegative() && Offset <= Size) 332742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size -= Offset; 332842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall else 332942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size = CharUnits::Zero(); 33304f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(Size, E); 333142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 333242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 33338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::VisitCallExpr(const CallExpr *E) { 3334180f47959a066795cc0f409433023af448bb0328Richard Smith switch (E->isBuiltinCall()) { 3335019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner default: 33368cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitCallExpr(E); 333764eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 333864eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump case Builtin::BI__builtin_object_size: { 333942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (TryEvaluateBuiltinObjectSize(E)) 334042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 334164eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 3342b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // If evaluating the argument has side-effects we can't determine 3343b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // the size of the object and lower it to unknown now. 3344393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (E->getArg(0)->HasSideEffects(Info.Ctx)) { 3345a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith if (E->getArg(1)->EvaluateKnownConstInt(Info.Ctx).getZExtValue() <= 1) 3346cf184655319cf7a5b811067cff9d26a5741fd161Chris Lattner return Success(-1ULL, E); 334764eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Success(0, E); 334864eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 3349c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 3350f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 335164eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 335264eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 3353019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_classify_type: 3354131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(EvaluateBuiltinClassifyType(E), E); 33551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3356e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith case Builtin::BI__builtin_constant_p: { 3357e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith const Expr *Arg = E->getArg(0); 3358e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith QualType ArgType = Arg->getType(); 3359e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // __builtin_constant_p always has one operand. The rules which gcc follows 3360e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // are not precisely documented, but are as follows: 3361e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // 3362e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // - If the operand is of integral, floating, complex or enumeration type, 3363e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // and can be folded to a known value of that type, it returns 1. 3364e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // - If the operand and can be folded to a pointer to the first character 3365e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // of a string literal (or such a pointer cast to an integral type), it 3366e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // returns 1. 3367e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // 3368e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // Otherwise, it returns 0. 3369e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // 3370e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // FIXME: GCC also intends to return 1 for literals of aggregate types, but 3371e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // its support for this does not currently work. 3372e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith int IsConstant = 0; 3373e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith if (ArgType->isIntegralOrEnumerationType()) { 3374e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // Note, a pointer cast to an integral type is only a constant if it is 3375e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // a pointer to the first character of a string literal. 3376e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith Expr::EvalResult Result; 3377e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith if (Arg->EvaluateAsRValue(Result, Info.Ctx) && !Result.HasSideEffects) { 3378e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith APValue &V = Result.Val; 3379e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith if (V.getKind() == APValue::LValue) { 3380e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith if (const Expr *E = V.getLValueBase().dyn_cast<const Expr*>()) 3381e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith IsConstant = isa<StringLiteral>(E) && V.getLValueOffset().isZero(); 3382e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith } else { 3383e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith IsConstant = 1; 3384e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith } 3385e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith } 3386e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith } else if (ArgType->isFloatingType() || ArgType->isAnyComplexType()) { 3387e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith IsConstant = Arg->isEvaluatable(Info.Ctx); 3388e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith } else if (ArgType->isPointerType() || Arg->isGLValue()) { 3389e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith LValue LV; 3390e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // Use a separate EvalInfo: ignore constexpr parameter and 'this' bindings 3391e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith // during the check. 3392e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith Expr::EvalStatus Status; 3393e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith EvalInfo SubInfo(Info.Ctx, Status); 3394e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith if ((Arg->isGLValue() ? EvaluateLValue(Arg, LV, SubInfo) 3395e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith : EvaluatePointer(Arg, LV, SubInfo)) && 3396e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith !Status.HasSideEffects) 3397e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith if (const Expr *E = LV.getLValueBase().dyn_cast<const Expr*>()) 3398e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith IsConstant = isa<StringLiteral>(E) && LV.getLValueOffset().isZero(); 3399e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith } 3400e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith 3401e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith return Success(IsConstant, E); 3402e052d46f4db91f9ba572859ffc984e85cbf5d5ffRichard Smith } 340321fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner case Builtin::BI__builtin_eh_return_data_regno: { 3404a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith int Operand = E->getArg(0)->EvaluateKnownConstInt(Info.Ctx).getZExtValue(); 3405bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor Operand = Info.Ctx.getTargetInfo().getEHDataRegisterNumber(Operand); 340621fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner return Success(Operand, E); 340721fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner } 3408c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman 3409c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman case Builtin::BI__builtin_expect: 3410c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman return Visit(E->getArg(0)); 34115726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 34125726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor case Builtin::BIstrlen: 34135726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor case Builtin::BI__builtin_strlen: 34145726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // As an extension, we support strlen() and __builtin_strlen() as constant 34155726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // expressions when the argument is a string literal. 34168cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (const StringLiteral *S 34175726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor = dyn_cast<StringLiteral>(E->getArg(0)->IgnoreParenImpCasts())) { 34185726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // The string literal may have embedded null characters. Find the first 34195726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // one and truncate there. 34205f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Str = S->getString(); 34215f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef::size_type Pos = Str.find(0); 34225f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner if (Pos != StringRef::npos) 34235726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor Str = Str.substr(0, Pos); 34245726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 34255726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor return Success(Str.size(), E); 34265726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor } 34275726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 3428f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 3429454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 3430454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman case Builtin::BI__atomic_is_lock_free: { 3431454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman APSInt SizeVal; 3432454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman if (!EvaluateInteger(E->getArg(0), SizeVal, Info)) 3433454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman return false; 3434454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 3435454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // For __atomic_is_lock_free(sizeof(_Atomic(T))), if the size is a power 3436454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // of two less than the maximum inline atomic width, we know it is 3437454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // lock-free. If the size isn't a power of two, or greater than the 3438454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // maximum alignment where we promote atomics, we know it is not lock-free 3439454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // (at least not in the sense of atomic_is_lock_free). Otherwise, 3440454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // the answer can only be determined at runtime; for example, 16-byte 3441454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // atomics have lock-free implementations on some, but not all, 3442454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // x86-64 processors. 3443454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 3444454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // Check power-of-two. 3445454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman CharUnits Size = CharUnits::fromQuantity(SizeVal.getZExtValue()); 3446454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman if (!Size.isPowerOfTwo()) 3447454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman#if 0 3448454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // FIXME: Suppress this folding until the ABI for the promotion width 3449454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // settles. 3450454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman return Success(0, E); 3451454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman#else 3452f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 3453454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman#endif 3454454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 3455454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman#if 0 3456454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // Check against promotion width. 3457454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // FIXME: Suppress this folding until the ABI for the promotion width 3458454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // settles. 3459454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman unsigned PromoteWidthBits = 3460454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman Info.Ctx.getTargetInfo().getMaxAtomicPromoteWidth(); 3461454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman if (Size > Info.Ctx.toCharUnitsFromBits(PromoteWidthBits)) 3462454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman return Success(0, E); 3463454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman#endif 3464454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 3465454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // Check against inlining width. 3466454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman unsigned InlineWidthBits = 3467454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman Info.Ctx.getTargetInfo().getMaxAtomicInlineWidth(); 3468454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman if (Size <= Info.Ctx.toCharUnitsFromBits(InlineWidthBits)) 3469454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman return Success(1, E); 3470454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 3471f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 3472454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman } 3473019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 34744c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 3475f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 3476625b80755b603d28f36fb4212c81484d87ad08d3Richard Smithstatic bool HasSameBase(const LValue &A, const LValue &B) { 3477625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith if (!A.getLValueBase()) 3478625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith return !B.getLValueBase(); 3479625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith if (!B.getLValueBase()) 3480625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith return false; 3481625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith 34821bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith if (A.getLValueBase().getOpaqueValue() != 34831bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith B.getLValueBase().getOpaqueValue()) { 3484625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith const Decl *ADecl = GetLValueBaseDecl(A); 3485625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith if (!ADecl) 3486625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith return false; 3487625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith const Decl *BDecl = GetLValueBaseDecl(B); 34889a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith if (!BDecl || ADecl->getCanonicalDecl() != BDecl->getCanonicalDecl()) 3489625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith return false; 3490625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith } 3491625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith 3492625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith return IsGlobalLValue(A.getLValueBase()) || 3493177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith A.getLValueFrame() == B.getLValueFrame(); 3494625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith} 3495625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith 3496b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 3497c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (E->isAssignmentOp()) 3498f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 3499c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 35002de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Comma) { 35018327fad71da34492d82c532f42a58cb4baff81a3Richard Smith VisitIgnoredValue(E->getLHS()); 35028327fad71da34492d82c532f42a58cb4baff81a3Richard Smith return Visit(E->getRHS()); 3503a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 3504a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 3505a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->isLogicalOp()) { 3506a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // These need to be handled specially because the operands aren't 3507a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // necessarily integral 3508fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool lhsResult, rhsResult; 35091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3510c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (EvaluateAsBooleanCondition(E->getLHS(), lhsResult, Info)) { 351151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // We were able to evaluate the LHS, see if we can get away with not 351251fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // evaluating the RHS: 0 && X -> 0, 1 || X -> 1 35132de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (lhsResult == (E->getOpcode() == BO_LOr)) 35143f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(lhsResult, E); 3515a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 3516c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (EvaluateAsBooleanCondition(E->getRHS(), rhsResult, Info)) { 35172de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_LOr) 3518131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult || rhsResult, E); 35194bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson else 3520131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult && rhsResult, E); 35214bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 35224bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } else { 3523f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // FIXME: If both evaluations fail, we should produce the diagnostic from 3524f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // the LHS. If the LHS is non-constant and the RHS is unevaluatable, it's 3525f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // less clear how to diagnose this. 3526c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (EvaluateAsBooleanCondition(E->getRHS(), rhsResult, Info)) { 35274bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // We can't evaluate the LHS; however, sometimes the result 35284bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // is determined by the RHS: X && 0 -> 0, X || 1 -> 1. 3529f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (rhsResult == (E->getOpcode() == BO_LOr)) { 3530131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // Since we weren't able to evaluate the left hand side, it 3531fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // must have had side effects. 35321e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith Info.EvalStatus.HasSideEffects = true; 3533131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 3534131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(rhsResult, E); 35354bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 35364bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 3537a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 3538a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 3539a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 3540c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner } 354154176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 3542286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType LHSTy = E->getLHS()->getType(); 3543286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType RHSTy = E->getRHS()->getType(); 35444087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 35454087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHSTy->isAnyComplexType()) { 35464087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar assert(RHSTy->isAnyComplexType() && "Invalid comparison"); 3547f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS, RHS; 35484087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 35494087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getLHS(), LHS, Info)) 35504087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 35514087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 35524087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 35534087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 35544087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 35554087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHS.isComplexFloat()) { 35561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_r = 35574087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatReal().compare(RHS.getComplexFloatReal()); 35581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_i = 35594087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatImag().compare(RHS.getComplexFloatImag()); 35604087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 35612de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) 3562131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((CR_r == APFloat::cmpEqual && 3563131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpEqual), E); 3564131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 35652de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(E->getOpcode() == BO_NE && 3566131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid complex comparison."); 35671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(((CR_r == APFloat::cmpGreaterThan || 3568fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpLessThan || 3569fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpUnordered) || 35701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (CR_i == APFloat::cmpGreaterThan || 3571fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpLessThan || 3572fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpUnordered)), E); 3573131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 35744087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } else { 35752de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) 3576131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() == RHS.getComplexIntReal() && 3577131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() == RHS.getComplexIntImag()), E); 3578131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 35792de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(E->getOpcode() == BO_NE && 3580131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid compex comparison."); 3581131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() != RHS.getComplexIntReal() || 3582131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() != RHS.getComplexIntImag()), E); 3583131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 35844087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 35854087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 35861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3587286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (LHSTy->isRealFloatingType() && 3588286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson RHSTy->isRealFloatingType()) { 3589286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat RHS(0.0), LHS(0.0); 35901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3591286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getRHS(), RHS, Info)) 3592286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 35931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3594286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getLHS(), LHS, Info)) 3595286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 35961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3597286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat::cmpResult CR = LHS.compare(RHS); 3598529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson 3599286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson switch (E->getOpcode()) { 3600286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson default: 3601b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Invalid binary operator!"); 36022de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: 3603131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan, E); 36042de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: 3605131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan, E); 36062de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: 3607131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan || CR == APFloat::cmpEqual, E); 36082de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: 36091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan || CR == APFloat::cmpEqual, 3610131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 36112de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: 3612131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpEqual, E); 36132de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: 36141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan 3615fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpLessThan 3616fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpUnordered, E); 3617286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 3618286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 36191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3620ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (LHSTy->isPointerType() && RHSTy->isPointerType()) { 3621625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith if (E->getOpcode() == BO_Sub || E->isComparisonOp()) { 3622efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LHSValue; 36233068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getLHS(), LHSValue, Info)) 36243068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 3625a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 3626efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue RHSValue; 36273068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getRHS(), RHSValue, Info)) 36283068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 3629a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 3630625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith // Reject differing bases from the normal codepath; we special-case 3631625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith // comparisons to null. 3632625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith if (!HasSameBase(LHSValue, RHSValue)) { 36339e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith // Inequalities and subtractions between unrelated pointers have 36349e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith // unspecified or undefined behavior. 36355bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 3636f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 3637ffbda40a1fb7169591dc01771f3511178a2f727cEli Friedman // A constant address may compare equal to the address of a symbol. 3638ffbda40a1fb7169591dc01771f3511178a2f727cEli Friedman // The one exception is that address of an object cannot compare equal 3639c45061bd0c0fdad4df8eea7e9e5af186d11427e5Eli Friedman // to a null pointer constant. 3640ffbda40a1fb7169591dc01771f3511178a2f727cEli Friedman if ((!LHSValue.Base && !LHSValue.Offset.isZero()) || 3641ffbda40a1fb7169591dc01771f3511178a2f727cEli Friedman (!RHSValue.Base && !RHSValue.Offset.isZero())) 3642f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 36439e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith // It's implementation-defined whether distinct literals will have 3644c45061bd0c0fdad4df8eea7e9e5af186d11427e5Eli Friedman // distinct addresses. In clang, we do not guarantee the addresses are 364574f4634781cee06e28eb741bda5d0f936fdd1948Richard Smith // distinct. However, we do know that the address of a literal will be 364674f4634781cee06e28eb741bda5d0f936fdd1948Richard Smith // non-null. 364774f4634781cee06e28eb741bda5d0f936fdd1948Richard Smith if ((IsLiteralLValue(LHSValue) || IsLiteralLValue(RHSValue)) && 364874f4634781cee06e28eb741bda5d0f936fdd1948Richard Smith LHSValue.Base && RHSValue.Base) 3649f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 36509e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith // We can't tell whether weak symbols will end up pointing to the same 36519e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith // object. 36529e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith if (IsWeakLValue(LHSValue) || IsWeakLValue(RHSValue)) 3653f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 36549e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith // Pointers with different bases cannot represent the same object. 3655c45061bd0c0fdad4df8eea7e9e5af186d11427e5Eli Friedman // (Note that clang defaults to -fmerge-all-constants, which can 3656c45061bd0c0fdad4df8eea7e9e5af186d11427e5Eli Friedman // lead to inconsistent results for comparisons involving the address 3657c45061bd0c0fdad4df8eea7e9e5af186d11427e5Eli Friedman // of a constant; this generally doesn't matter in practice.) 36589e36b533af1b2fa9f32c4372c4081abdd86f47e0Richard Smith return Success(E->getOpcode() == BO_NE, E); 36595bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } 3660a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 3661cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith // FIXME: Implement the C++11 restrictions: 3662cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith // - Pointer subtractions must be on elements of the same array. 3663cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith // - Pointer comparisons must be between members with the same access. 3664cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith 36652de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Sub) { 36664992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType Type = E->getLHS()->getType(); 36674992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType ElementType = Type->getAs<PointerType>()->getPointeeType(); 36683068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 3669180f47959a066795cc0f409433023af448bb0328Richard Smith CharUnits ElementSize; 3670180f47959a066795cc0f409433023af448bb0328Richard Smith if (!HandleSizeof(Info, ElementType, ElementSize)) 3671180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 3672a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 3673180f47959a066795cc0f409433023af448bb0328Richard Smith CharUnits Diff = LHSValue.getLValueOffset() - 3674a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSValue.getLValueOffset(); 3675a73058324197b7bdfd19307965954f626e26199dKen Dyck return Success(Diff / ElementSize, E); 3676ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 3677625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith 3678625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith const CharUnits &LHSOffset = LHSValue.getLValueOffset(); 3679625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith const CharUnits &RHSOffset = RHSValue.getLValueOffset(); 3680625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith switch (E->getOpcode()) { 3681625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith default: llvm_unreachable("missing comparison operator"); 3682625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith case BO_LT: return Success(LHSOffset < RHSOffset, E); 3683625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith case BO_GT: return Success(LHSOffset > RHSOffset, E); 3684625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith case BO_LE: return Success(LHSOffset <= RHSOffset, E); 3685625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith case BO_GE: return Success(LHSOffset >= RHSOffset, E); 3686625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith case BO_EQ: return Success(LHSOffset == RHSOffset, E); 3687625b80755b603d28f36fb4212c81484d87ad08d3Richard Smith case BO_NE: return Success(LHSOffset != RHSOffset, E); 3688ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 36893068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 36903068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 36912ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!LHSTy->isIntegralOrEnumerationType() || 36922ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor !RHSTy->isIntegralOrEnumerationType()) { 3693e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // We can't continue from here for non-integral types. 3694e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return ExprEvaluatorBaseTy::VisitBinaryOperator(E); 3695a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 3696a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 3697a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // The LHS of a constant expr is always evaluated and needed. 369847a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue LHSVal; 3699c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (!EvaluateIntegerOrLValue(E->getLHS(), LHSVal, Info)) 3700f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 3701d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman 3702c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (!Visit(E->getRHS())) 370330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 370447a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith CCValue &RHSVal = Result; 370542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 370642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like (unsigned long)&a + 4. 3707c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (E->isAdditiveOp() && LHSVal.isLValue() && RHSVal.isInt()) { 3708a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits AdditionalOffset = CharUnits::fromQuantity( 3709a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSVal.getInt().getZExtValue()); 37102de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add) 371147a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith LHSVal.getLValueOffset() += AdditionalOffset; 371242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman else 371347a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith LHSVal.getLValueOffset() -= AdditionalOffset; 371447a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith Result = LHSVal; 371542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 371642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 371742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 371842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like 4 + (unsigned long)&a 37192de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add && 3720c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith RHSVal.isLValue() && LHSVal.isInt()) { 372147a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith RHSVal.getLValueOffset() += CharUnits::fromQuantity( 372247a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith LHSVal.getInt().getZExtValue()); 372347a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith // Note that RHSVal is Result. 372442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 372542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 372642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 372742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // All the following cases expect both operands to be an integer 3728c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (!LHSVal.isInt() || !RHSVal.isInt()) 3729f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 3730a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 3731c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith APSInt &LHS = LHSVal.getInt(); 3732c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith APSInt &RHS = RHSVal.getInt(); 373342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 3734a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson switch (E->getOpcode()) { 373532fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner default: 3736f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 3737c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_Mul: return Success(LHS * RHS, E); 3738c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_Add: return Success(LHS + RHS, E); 3739c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_Sub: return Success(LHS - RHS, E); 3740c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_And: return Success(LHS & RHS, E); 3741c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_Xor: return Success(LHS ^ RHS, E); 3742c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_Or: return Success(LHS | RHS, E); 37432de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 374454176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 3745f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E, diag::note_expr_divide_by_zero); 3746c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return Success(LHS / RHS, E); 37472de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Rem: 374854176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 3749f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E, diag::note_expr_divide_by_zero); 3750c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return Success(LHS % RHS, E); 37512de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shl: { 3752091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall // During constant-folding, a negative shift is an opposite shift. 3753091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall if (RHS.isSigned() && RHS.isNegative()) { 3754091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall RHS = -RHS; 3755091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall goto shift_right; 3756091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall } 3757091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall 3758091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall shift_left: 3759091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall unsigned SA 3760c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith = (unsigned) RHS.getLimitedValue(LHS.getBitWidth()-1); 3761c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return Success(LHS << SA, E); 37623f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 37632de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shr: { 3764091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall // During constant-folding, a negative shift is an opposite shift. 3765091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall if (RHS.isSigned() && RHS.isNegative()) { 3766091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall RHS = -RHS; 3767091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall goto shift_left; 3768091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall } 3769091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall 3770091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall shift_right: 37711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 3772c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith (unsigned) RHS.getLimitedValue(LHS.getBitWidth()-1); 3773c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return Success(LHS >> SA, E); 37743f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 37751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3776c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_LT: return Success(LHS < RHS, E); 3777c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_GT: return Success(LHS > RHS, E); 3778c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_LE: return Success(LHS <= RHS, E); 3779c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_GE: return Success(LHS >= RHS, E); 3780c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_EQ: return Success(LHS == RHS, E); 3781c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith case BO_NE: return Success(LHS != RHS, E); 3782b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 3783a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 3784a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 37858b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfType(QualType T) { 37865d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 37875d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 37885d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 37895d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 37905d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = T->getAs<ReferenceType>()) 37915d484e8cf710207010720589d89602233de61d01Sebastian Redl T = Ref->getPointeeType(); 37929f1210c3280104417a4ad30f0a00825ac8fa718aChad Rosier 37939f1210c3280104417a4ad30f0a00825ac8fa718aChad Rosier // __alignof is defined to return the preferred alignment. 37949f1210c3280104417a4ad30f0a00825ac8fa718aChad Rosier return Info.Ctx.toCharUnitsFromBits( 37959f1210c3280104417a4ad30f0a00825ac8fa718aChad Rosier Info.Ctx.getPreferredTypeAlign(T.getTypePtr())); 3796e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 3797e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 37988b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfExpr(const Expr *E) { 3799af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner E = E->IgnoreParens(); 3800af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 3801af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // alignof decl is always accepted, even if it doesn't make sense: we default 38021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // to 1 in those cases. 3803af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 38048b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(DRE->getDecl(), 38058b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 3806a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 3807af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) 38088b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(ME->getMemberDecl(), 38098b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 3810af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 3811e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(E->getType()); 3812e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 3813e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 3814e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 3815f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne/// VisitUnaryExprOrTypeTraitExpr - Evaluate a sizeof, alignof or vec_step with 3816f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne/// a result as the expression's type. 3817f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbournebool IntExprEvaluator::VisitUnaryExprOrTypeTraitExpr( 3818f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne const UnaryExprOrTypeTraitExpr *E) { 3819f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne switch(E->getKind()) { 3820f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case UETT_AlignOf: { 3821e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (E->isArgumentType()) 38224f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(GetAlignOfType(E->getArgumentType()), E); 3823e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner else 38244f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(GetAlignOfExpr(E->getArgumentExpr()), E); 3825e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner } 3826a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 3827f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case UETT_VecStep: { 3828f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne QualType Ty = E->getTypeOfArgument(); 38290518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 3830f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (Ty->isVectorType()) { 3831f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne unsigned n = Ty->getAs<VectorType>()->getNumElements(); 3832a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 3833f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // The vec_step built-in functions that take a 3-component 3834f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // vector return 4. (OpenCL 1.1 spec 6.11.12) 3835f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (n == 3) 3836f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne n = 4; 3837f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 3838f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return Success(n, E); 3839f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } else 3840f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return Success(1, E); 3841f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } 3842f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 3843f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case UETT_SizeOf: { 3844f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne QualType SrcTy = E->getTypeOfArgument(); 3845f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 3846f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // the result is the size of the referenced type." 3847f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 3848f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // result shall be the alignment of the referenced type." 3849f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (const ReferenceType *Ref = SrcTy->getAs<ReferenceType>()) 3850f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne SrcTy = Ref->getPointeeType(); 3851f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 3852180f47959a066795cc0f409433023af448bb0328Richard Smith CharUnits Sizeof; 3853180f47959a066795cc0f409433023af448bb0328Richard Smith if (!HandleSizeof(Info, SrcTy, Sizeof)) 3854f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return false; 3855180f47959a066795cc0f409433023af448bb0328Richard Smith return Success(Sizeof, E); 3856f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } 3857f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } 3858f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 3859f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne llvm_unreachable("unknown expr/type trait"); 3860f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 3861fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner} 3862fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 38638cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::VisitOffsetOfExpr(const OffsetOfExpr *OOE) { 38648ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits Result; 38658cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne unsigned n = OOE->getNumComponents(); 38668ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (n == 0) 3867f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(OOE); 38688cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne QualType CurrentType = OOE->getTypeSourceInfo()->getType(); 38698ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor for (unsigned i = 0; i != n; ++i) { 38708ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor OffsetOfExpr::OffsetOfNode ON = OOE->getComponent(i); 38718ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor switch (ON.getKind()) { 38728ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Array: { 38738cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr *Idx = OOE->getIndexExpr(ON.getArrayExprIndex()); 38748ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor APSInt IdxResult; 38758ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!EvaluateInteger(Idx, IdxResult, Info)) 38768ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 38778ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ArrayType *AT = Info.Ctx.getAsArrayType(CurrentType); 38788ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!AT) 3879f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(OOE); 38808ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = AT->getElementType(); 38818ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits ElementSize = Info.Ctx.getTypeSizeInChars(CurrentType); 38828ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Result += IdxResult.getSExtValue() * ElementSize; 38838ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 38848ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 3885f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 38868ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Field: { 38878ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor FieldDecl *MemberDecl = ON.getField(); 38888ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 3889f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!RT) 3890f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(OOE); 38918ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor RecordDecl *RD = RT->getDecl(); 38928ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 3893ba4f5d5754c8291690d01ca9581926673d69b24cJohn McCall unsigned i = MemberDecl->getFieldIndex(); 3894cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor assert(i < RL.getFieldCount() && "offsetof field in wrong type"); 3895fb1e3bc29b667f4275e1d5a43d64ec173f4f9a7dKen Dyck Result += Info.Ctx.toCharUnitsFromBits(RL.getFieldOffset(i)); 38968ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = MemberDecl->getType().getNonReferenceType(); 38978ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 38988ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 3899f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 39008ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Identifier: 39018ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor llvm_unreachable("dependent __builtin_offsetof"); 3902f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(OOE); 3903f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 3904cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor case OffsetOfExpr::OffsetOfNode::Base: { 3905cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CXXBaseSpecifier *BaseSpec = ON.getBase(); 3906cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (BaseSpec->isVirtual()) 3907f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(OOE); 3908cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 3909cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the layout of the class whose base we are looking into. 3910cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 3911f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!RT) 3912f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(OOE); 3913cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor RecordDecl *RD = RT->getDecl(); 3914cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 3915cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 3916cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the base class itself. 3917cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CurrentType = BaseSpec->getType(); 3918cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *BaseRT = CurrentType->getAs<RecordType>(); 3919cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (!BaseRT) 3920f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(OOE); 3921cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 3922cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Add the offset to the base. 39237c7f820d70c925b29290a8563b59615816a827fcKen Dyck Result += RL.getBaseClassOffset(cast<CXXRecordDecl>(BaseRT->getDecl())); 3924cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor break; 3925cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor } 39268ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 39278ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 39288cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Success(Result, OOE); 39298ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor} 39308ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 3931b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 393275a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner switch (E->getOpcode()) { 39334c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner default: 393475a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 393575a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // See C99 6.6p3. 3936f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 39372de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: 39384c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // FIXME: Should extension allow i-c-e extension expressions in its scope? 39394c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // If so, we could clear the diagnostic ID. 3940f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Visit(E->getSubExpr()); 39412de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 3942c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // The result is just the value. 3943f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Visit(E->getSubExpr()); 3944f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith case UO_Minus: { 3945f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!Visit(E->getSubExpr())) 3946f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 3947f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!Result.isInt()) return Error(E); 3948f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Success(-Result.getInt(), E); 3949f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 3950f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith case UO_Not: { 3951f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!Visit(E->getSubExpr())) 3952f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 3953f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!Result.isInt()) return Error(E); 3954f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Success(~Result.getInt(), E); 3955f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 3956f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith case UO_LNot: { 3957f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith bool bres; 3958f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!EvaluateAsBooleanCondition(E->getSubExpr(), bres, Info)) 3959f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 3960f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Success(!bres, E); 3961f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 396206a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson } 3963a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 39641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3965732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// HandleCast - This is used to evaluate implicit or explicit casts where the 3966732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// result type is integer. 39678cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::VisitCastExpr(const CastExpr *E) { 39688cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr *SubExpr = E->getSubExpr(); 396982206e267ce6cc709797127616f64672d255b310Anders Carlsson QualType DestType = E->getType(); 3970b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar QualType SrcType = SubExpr->getType(); 397182206e267ce6cc709797127616f64672d255b310Anders Carlsson 397246a523285928aa07bf14803178dc04616ac85994Eli Friedman switch (E->getCastKind()) { 397346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_BaseToDerived: 397446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_DerivedToBase: 397546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_UncheckedDerivedToBase: 397646a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_Dynamic: 397746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ToUnion: 397846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ArrayToPointerDecay: 397946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FunctionToPointerDecay: 398046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_NullToPointer: 398146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_NullToMemberPointer: 398246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_BaseToDerivedMemberPointer: 398346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_DerivedToBaseMemberPointer: 398446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ConstructorConversion: 398546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralToPointer: 398646a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ToVoid: 398746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_VectorSplat: 398846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralToFloating: 398946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingCast: 39901d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_CPointerToObjCPointerCast: 39911d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_BlockPointerToObjCPointerCast: 399246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_AnyPointerToBlockPointerCast: 399346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ObjCObjectLValueCast: 399446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingRealToComplex: 399546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexToReal: 399646a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexCast: 399746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexToIntegralComplex: 399846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralRealToComplex: 399946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexCast: 400046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexToFloatingComplex: 400146a523285928aa07bf14803178dc04616ac85994Eli Friedman llvm_unreachable("invalid cast kind for integral value"); 400246a523285928aa07bf14803178dc04616ac85994Eli Friedman 4003e50c297f92914ca996deb8b597624193273b62e4Eli Friedman case CK_BitCast: 400446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_Dependent: 400546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_LValueBitCast: 400646a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_UserDefinedConversion: 400733e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCProduceObject: 400833e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCConsumeObject: 400933e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCReclaimReturnedObject: 401033e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCExtendBlockObject: 4011f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 401246a523285928aa07bf14803178dc04616ac85994Eli Friedman 401346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_LValueToRValue: 401446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_NoOp: 4015c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return ExprEvaluatorBaseTy::VisitCastExpr(E); 401646a523285928aa07bf14803178dc04616ac85994Eli Friedman 401746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_MemberPointerToBoolean: 401846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_PointerToBoolean: 401946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralToBoolean: 402046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingToBoolean: 402146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexToBoolean: 402246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexToBoolean: { 40234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 4024c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (!EvaluateAsBooleanCondition(SubExpr, BoolResult, Info)) 40254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 4026131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(BoolResult, E); 40274efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 40284efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 402946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralCast: { 4030732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!Visit(SubExpr)) 4031b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 4032a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 4033be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!Result.isInt()) { 4034be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // Only allow casts of lvalues if they are lossless. 4035be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return Info.Ctx.getTypeSize(DestType) == Info.Ctx.getTypeSize(SrcType); 4036be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 403730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 4038dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, 403930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt(), Info.Ctx), E); 4040732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner } 40411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 404246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_PointerToIntegral: { 4043c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith CCEDiag(E, diag::note_constexpr_invalid_cast) << 2; 4044c216a01c96d83bd9a90e214af64913e93d39aaccRichard Smith 4045efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 404687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(SubExpr, LV, Info)) 4047b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 40484efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4049dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (LV.getLValueBase()) { 4050dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar // Only allow based lvalue casts if they are lossless. 4051dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(SrcType)) 4052f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 4053dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar 4054b755a9da095d2f2f04444797f1e1a9511693815bRichard Smith LV.Designator.setInvalid(); 4055efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result); 4056dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return true; 4057dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar } 40584efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4059a73058324197b7bdfd19307965954f626e26199dKen Dyck APSInt AsInt = Info.Ctx.MakeIntValue(LV.getLValueOffset().getQuantity(), 4060a73058324197b7bdfd19307965954f626e26199dKen Dyck SrcType); 4061dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, AsInt, Info.Ctx), E); 40622bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 40634efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 406446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexToReal: { 4065f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue C; 40661725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (!EvaluateComplex(SubExpr, C, Info)) 40671725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return false; 406846a523285928aa07bf14803178dc04616ac85994Eli Friedman return Success(C.getComplexIntReal(), E); 40691725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 40702217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 407146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingToIntegral: { 407246a523285928aa07bf14803178dc04616ac85994Eli Friedman APFloat F(0.0); 407346a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!EvaluateFloat(SubExpr, F, Info)) 407446a523285928aa07bf14803178dc04616ac85994Eli Friedman return false; 4075732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 4076c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith APSInt Value; 4077c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (!HandleFloatToIntCast(Info, E, SrcType, F, DestType, Value)) 4078c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return false; 4079c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return Success(Value, E); 408046a523285928aa07bf14803178dc04616ac85994Eli Friedman } 408146a523285928aa07bf14803178dc04616ac85994Eli Friedman } 40821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 408346a523285928aa07bf14803178dc04616ac85994Eli Friedman llvm_unreachable("unknown cast resulting in integral value"); 4084f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 4085a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 40862bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 4087722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedmanbool IntExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 4088722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 4089f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 4090f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!EvaluateComplex(E->getSubExpr(), LV, Info)) 4091f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 4092f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!LV.isComplexInt()) 4093f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 4094722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntReal(), E); 4095722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 4096722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 4097722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Visit(E->getSubExpr()); 4098722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman} 4099722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 4100664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedmanbool IntExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 4101722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isComplexIntegerType()) { 4102f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 4103f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!EvaluateComplex(E->getSubExpr(), LV, Info)) 4104f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 4105f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!LV.isComplexInt()) 4106f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 4107722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntImag(), E); 4108722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 4109722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 41108327fad71da34492d82c532f42a58cb4baff81a3Richard Smith VisitIgnoredValue(E->getSubExpr()); 4111664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 4112664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman} 4113664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 4114ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregorbool IntExprEvaluator::VisitSizeOfPackExpr(const SizeOfPackExpr *E) { 4115ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor return Success(E->getPackLength(), E); 4116ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor} 4117ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor 4118295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redlbool IntExprEvaluator::VisitCXXNoexceptExpr(const CXXNoexceptExpr *E) { 4119295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl return Success(E->getValue(), E); 4120295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl} 4121295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl 4122f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 4123d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman// Float Evaluation 4124d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 4125d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 4126d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmannamespace { 4127770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass FloatExprEvaluator 41288cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<FloatExprEvaluator, bool> { 4129d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat &Result; 4130d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanpublic: 4131d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman FloatExprEvaluator(EvalInfo &info, APFloat &result) 41328cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(result) {} 4133d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 413447a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith bool Success(const CCValue &V, const Expr *e) { 41358cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result = V.getFloat(); 41368cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 41378cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 4138d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 4139f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith bool ValueInitialization(const Expr *E) { 4140f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith Result = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(E->getType())); 4141f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return true; 4142f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 4143f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith 4144019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner bool VisitCallExpr(const CallExpr *E); 4145d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 41465db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar bool VisitUnaryOperator(const UnaryOperator *E); 4147d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 4148d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitFloatingLiteral(const FloatingLiteral *E); 41498cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E); 41502217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 4151abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryReal(const UnaryOperator *E); 4152abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryImag(const UnaryOperator *E); 4153ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 4154abd3a857ace59100305790545d1baae5877b8945John McCall // FIXME: Missing: array subscript of vector, member of vector, 4155abd3a857ace59100305790545d1baae5877b8945John McCall // ImplicitValueInitExpr 4156d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman}; 4157d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} // end anonymous namespace 4158d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 4159d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) { 4160c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith assert(E->isRValue() && E->getType()->isRealFloatingType()); 41618cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return FloatExprEvaluator(Info, Result).Visit(E); 4162d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 4163d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 41644ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadstatic bool TryEvaluateBuiltinNaN(const ASTContext &Context, 4165db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall QualType ResultTy, 4166db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const Expr *Arg, 4167db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall bool SNaN, 4168db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APFloat &Result) { 4169db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const StringLiteral *S = dyn_cast<StringLiteral>(Arg->IgnoreParenCasts()); 4170db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (!S) return false; 4171db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 4172db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const llvm::fltSemantics &Sem = Context.getFloatTypeSemantics(ResultTy); 4173db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 4174db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APInt fill; 4175db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 4176db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall // Treat empty strings as if they were zero. 4177db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (S->getString().empty()) 4178db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall fill = llvm::APInt(32, 0); 4179db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else if (S->getString().getAsInteger(0, fill)) 4180db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return false; 4181db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 4182db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (SNaN) 4183db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getSNaN(Sem, false, &fill); 4184db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else 4185db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getQNaN(Sem, false, &fill); 4186db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return true; 4187db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall} 4188db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 4189019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattnerbool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) { 4190180f47959a066795cc0f409433023af448bb0328Richard Smith switch (E->isBuiltinCall()) { 41918cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne default: 41928cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitCallExpr(E); 41938cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4194019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_val: 4195019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_valf: 4196019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_vall: 4197019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inf: 4198019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inff: 41997cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar case Builtin::BI__builtin_infl: { 42007cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 42017cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 420234a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner Result = llvm::APFloat::getInf(Sem); 420334a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner return true; 42047cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar } 42051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4206db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nans: 4207db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansf: 4208db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansl: 4209f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 4210f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith true, Result)) 4211f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 4212f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return true; 4213db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 42149e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nan: 42159e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanf: 42169e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanl: 42174572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump // If this is __builtin_nan() turn this into a nan, otherwise we 42189e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // can't constant fold it. 4219f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 4220f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith false, Result)) 4221f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 4222f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return true; 42235db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 42245db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabs: 42255db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsf: 42265db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsl: 42275db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info)) 42285db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 42291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 42305db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (Result.isNegative()) 42315db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 42325db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 42335db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 42341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysign: 42351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysignf: 42365db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignl: { 42375db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.); 42385db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info) || 42395db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar !EvaluateFloat(E->getArg(1), RHS, Info)) 42405db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 42415db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.copySign(RHS); 42425db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 42435db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 4244019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 4245019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner} 4246019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 4247abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 424843efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 424943efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman ComplexValue CV; 425043efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 425143efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return false; 425243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = CV.FloatReal; 425343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return true; 425443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman } 425543efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman 425643efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return Visit(E->getSubExpr()); 4257abd3a857ace59100305790545d1baae5877b8945John McCall} 4258abd3a857ace59100305790545d1baae5877b8945John McCall 4259abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 426043efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 426143efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman ComplexValue CV; 426243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 426343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return false; 426443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = CV.FloatImag; 426543efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return true; 426643efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman } 426743efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman 42688327fad71da34492d82c532f42a58cb4baff81a3Richard Smith VisitIgnoredValue(E->getSubExpr()); 426943efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman const llvm::fltSemantics &Sem = Info.Ctx.getFloatTypeSemantics(E->getType()); 427043efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = llvm::APFloat::getZero(Sem); 4271abd3a857ace59100305790545d1baae5877b8945John McCall return true; 4272abd3a857ace59100305790545d1baae5877b8945John McCall} 4273abd3a857ace59100305790545d1baae5877b8945John McCall 42745db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbarbool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 42755db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar switch (E->getOpcode()) { 4276f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith default: return Error(E); 42772de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 42787993e8a2a26bf408c2a6d45f24fffa12db336b2bRichard Smith return EvaluateFloat(E->getSubExpr(), Result, Info); 42792de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 42807993e8a2a26bf408c2a6d45f24fffa12db336b2bRichard Smith if (!EvaluateFloat(E->getSubExpr(), Result, Info)) 42817993e8a2a26bf408c2a6d45f24fffa12db336b2bRichard Smith return false; 42825db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 42835db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 42845db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 42855db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar} 4286019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 4287d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 4288e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (E->isPtrMemOp() || E->isAssignmentOp() || E->getOpcode() == BO_Comma) 4289e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return ExprEvaluatorBaseTy::VisitBinaryOperator(E); 429096e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson 42915db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.0); 4292d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getLHS(), Result, Info)) 4293d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 4294d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getRHS(), RHS, Info)) 4295d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 4296d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 4297d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman switch (E->getOpcode()) { 4298f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith default: return Error(E); 42992de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 4300d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.multiply(RHS, APFloat::rmNearestTiesToEven); 4301d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 43022de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 4303d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.add(RHS, APFloat::rmNearestTiesToEven); 4304d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 43052de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 4306d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.subtract(RHS, APFloat::rmNearestTiesToEven); 4307d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 43082de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 4309d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.divide(RHS, APFloat::rmNearestTiesToEven); 4310d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 4311d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 4312d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 4313d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 4314d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) { 4315d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result = E->getValue(); 4316d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 4317d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 4318d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 43198cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool FloatExprEvaluator::VisitCastExpr(const CastExpr *E) { 43208cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr* SubExpr = E->getSubExpr(); 43211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 43222a523eec6a31955be876625819b89e8dc5def707Eli Friedman switch (E->getCastKind()) { 43232a523eec6a31955be876625819b89e8dc5def707Eli Friedman default: 4324c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return ExprEvaluatorBaseTy::VisitCastExpr(E); 43252a523eec6a31955be876625819b89e8dc5def707Eli Friedman 43262a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_IntegralToFloating: { 43274efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 4328c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return EvaluateInteger(SubExpr, IntResult, Info) && 4329c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith HandleIntToFloatCast(Info, E, SubExpr->getType(), IntResult, 4330c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith E->getType(), Result); 43314efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 43322a523eec6a31955be876625819b89e8dc5def707Eli Friedman 43332a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_FloatingCast: { 43344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!Visit(SubExpr)) 43354efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 4336c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return HandleFloatToFloatCast(Info, E, SubExpr->getType(), E->getType(), 4337c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Result); 43384efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 4339f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall 43402a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_FloatingComplexToReal: { 4341f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall ComplexValue V; 4342f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall if (!EvaluateComplex(SubExpr, V, Info)) 4343f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall return false; 4344f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall Result = V.getComplexFloatReal(); 4345f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall return true; 4346f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall } 43472a523eec6a31955be876625819b89e8dc5def707Eli Friedman } 43484efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4349f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 43504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 43514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4352d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 4353a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar// Complex Evaluation (for float and integer) 43549ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 43559ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 43569ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonnamespace { 4357770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass ComplexExprEvaluator 43588cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<ComplexExprEvaluator, bool> { 4359f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue &Result; 43601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 43619ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonpublic: 4362f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexExprEvaluator(EvalInfo &info, ComplexValue &Result) 43638cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(Result) {} 43641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 436547a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith bool Success(const CCValue &V, const Expr *e) { 43668cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result.setFrom(V); 43678cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 43688cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 43691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 43708cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 43718cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne // Visitor Methods 43728cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 43739ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 43748cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitImaginaryLiteral(const ImaginaryLiteral *E); 4375a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 43768cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E); 4377b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 4378b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 437996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara bool VisitUnaryOperator(const UnaryOperator *E); 4380cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl // FIXME Missing: ImplicitValueInitExpr, InitListExpr 4381b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman}; 4382b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} // end anonymous namespace 43831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4384b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedmanstatic bool EvaluateComplex(const Expr *E, ComplexValue &Result, 4385b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman EvalInfo &Info) { 4386c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith assert(E->isRValue() && E->getType()->isAnyComplexType()); 43878cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ComplexExprEvaluator(Info, Result).Visit(E); 4388b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} 4389b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 43908cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool ComplexExprEvaluator::VisitImaginaryLiteral(const ImaginaryLiteral *E) { 43918cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr* SubExpr = E->getSubExpr(); 4392b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 4393b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (SubExpr->getType()->isRealFloatingType()) { 4394b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexFloat(); 4395b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APFloat &Imag = Result.FloatImag; 4396b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateFloat(SubExpr, Imag, Info)) 4397b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 4398b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 4399b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatReal = APFloat(Imag.getSemantics()); 4400b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 4401b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } else { 4402b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman assert(SubExpr->getType()->isIntegerType() && 4403b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman "Unexpected imaginary literal."); 4404b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 4405b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexInt(); 4406b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APSInt &Imag = Result.IntImag; 4407b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateInteger(SubExpr, Imag, Info)) 4408b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 4409b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 4410b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntReal = APSInt(Imag.getBitWidth(), !Imag.isSigned()); 4411b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 4412b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } 4413b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} 4414b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 44158cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool ComplexExprEvaluator::VisitCastExpr(const CastExpr *E) { 4416b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 44178786da77984e81d48e0e1b2bd339809b1efc19f3John McCall switch (E->getCastKind()) { 44188786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BitCast: 44198786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BaseToDerived: 44208786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_DerivedToBase: 44218786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_UncheckedDerivedToBase: 44228786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_Dynamic: 44238786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ToUnion: 44248786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ArrayToPointerDecay: 44258786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FunctionToPointerDecay: 44268786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NullToPointer: 44278786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NullToMemberPointer: 44288786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BaseToDerivedMemberPointer: 44298786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_DerivedToBaseMemberPointer: 44308786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_MemberPointerToBoolean: 44318786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ConstructorConversion: 44328786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToPointer: 44338786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_PointerToIntegral: 44348786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_PointerToBoolean: 44358786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ToVoid: 44368786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_VectorSplat: 44378786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralCast: 44388786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToBoolean: 44398786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToFloating: 44408786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingToIntegral: 44418786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingToBoolean: 44428786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingCast: 44431d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_CPointerToObjCPointerCast: 44441d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_BlockPointerToObjCPointerCast: 44458786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_AnyPointerToBlockPointerCast: 44468786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ObjCObjectLValueCast: 44478786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToReal: 44488786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToBoolean: 44498786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToReal: 44508786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToBoolean: 445133e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCProduceObject: 445233e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCConsumeObject: 445333e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCReclaimReturnedObject: 445433e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCExtendBlockObject: 44558786da77984e81d48e0e1b2bd339809b1efc19f3John McCall llvm_unreachable("invalid cast kind for complex value"); 44568786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 44578786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_LValueToRValue: 44588786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NoOp: 4459c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return ExprEvaluatorBaseTy::VisitCastExpr(E); 44602bb5d00fcf71a7b4d478d478be778fff0494aff6John McCall 44618786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_Dependent: 446246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_LValueBitCast: 44638786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_UserDefinedConversion: 4464f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 44658786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 44668786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingRealToComplex: { 4467b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APFloat &Real = Result.FloatReal; 44688786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!EvaluateFloat(E->getSubExpr(), Real, Info)) 4469b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 4470b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 44718786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexFloat(); 44728786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatImag = APFloat(Real.getSemantics()); 44738786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 44748786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 44758786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 44768786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexCast: { 44778786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 44788786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 44798786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 44808786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 44818786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 44828786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 44838786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 4484c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return HandleFloatToFloatCast(Info, E, From, To, Result.FloatReal) && 4485c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith HandleFloatToFloatCast(Info, E, From, To, Result.FloatImag); 44868786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 44878786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 44888786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToIntegralComplex: { 44898786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 44908786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 44918786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 44928786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 44938786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 44948786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 44958786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexInt(); 4496c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return HandleFloatToIntCast(Info, E, From, Result.FloatReal, 4497c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith To, Result.IntReal) && 4498c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith HandleFloatToIntCast(Info, E, From, Result.FloatImag, 4499c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith To, Result.IntImag); 45008786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 45018786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 45028786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralRealToComplex: { 4503b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APSInt &Real = Result.IntReal; 45048786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!EvaluateInteger(E->getSubExpr(), Real, Info)) 4505b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 45069ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 45078786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexInt(); 45088786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntImag = APSInt(Real.getBitWidth(), !Real.isSigned()); 45098786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 45108786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 45118786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 45128786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexCast: { 45138786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 4514b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 4515ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 45168786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 45178786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 45188786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 45191725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 45208786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntReal = HandleIntToIntCast(To, From, Result.IntReal, Info.Ctx); 45218786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntImag = HandleIntToIntCast(To, From, Result.IntImag, Info.Ctx); 45228786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 45238786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 45248786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 45258786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToFloatingComplex: { 45268786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 45278786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 45288786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 45298786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 45308786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 45318786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 45328786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexFloat(); 4533c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return HandleIntToFloatCast(Info, E, From, Result.IntReal, 4534c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith To, Result.FloatReal) && 4535c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith HandleIntToFloatCast(Info, E, From, Result.IntImag, 4536c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith To, Result.FloatImag); 45378786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 4538ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 45391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 45408786da77984e81d48e0e1b2bd339809b1efc19f3John McCall llvm_unreachable("unknown cast resulting in complex value"); 4541f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 45429ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} 45439ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 4544f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallbool ComplexExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 4545e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (E->isPtrMemOp() || E->isAssignmentOp() || E->getOpcode() == BO_Comma) 45462ad226bdc847df6b6b6e4f832856478ab63bb3dcRichard Smith return ExprEvaluatorBaseTy::VisitBinaryOperator(E); 45472ad226bdc847df6b6b6e4f832856478ab63bb3dcRichard Smith 4548f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (!Visit(E->getLHS())) 4549f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 45501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4551f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue RHS; 4552a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 4553f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 4554a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 45553f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar assert(Result.isComplexFloat() == RHS.isComplexFloat() && 45563f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar "Invalid operands to binary operator."); 4557ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson switch (E->getOpcode()) { 4558f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith default: return Error(E); 45592de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 4560a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 4561a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().add(RHS.getComplexFloatReal(), 4562a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 4563a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().add(RHS.getComplexFloatImag(), 4564a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 4565a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 4566a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() += RHS.getComplexIntReal(); 4567a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() += RHS.getComplexIntImag(); 4568a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 45693f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 45702de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 4571a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 4572a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().subtract(RHS.getComplexFloatReal(), 4573a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 4574a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().subtract(RHS.getComplexFloatImag(), 4575a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 4576a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 4577a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() -= RHS.getComplexIntReal(); 4578a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() -= RHS.getComplexIntImag(); 4579a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 45803f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 45812de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 45823f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar if (Result.isComplexFloat()) { 4583f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 45843f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_r = LHS.getComplexFloatReal(); 45853f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_i = LHS.getComplexFloatImag(); 45863f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_r = RHS.getComplexFloatReal(); 45873f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_i = RHS.getComplexFloatImag(); 45881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 45893f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat Tmp = LHS_r; 45903f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 45913f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal() = Tmp; 45923f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 45933f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 45943f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal().subtract(Tmp, APFloat::rmNearestTiesToEven); 45953f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 45963f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_r; 45973f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 45983f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag() = Tmp; 45993f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 46003f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 46013f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag().add(Tmp, APFloat::rmNearestTiesToEven); 46023f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } else { 4603f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 46041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntReal() = 46053f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntReal() - 46063f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntImag()); 46071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntImag() = 46083f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntImag() + 46093f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntReal()); 46103f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } 46113f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 461296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case BO_Div: 461396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) { 461496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara ComplexValue LHS = Result; 461596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &LHS_r = LHS.getComplexFloatReal(); 461696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &LHS_i = LHS.getComplexFloatImag(); 461796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &RHS_r = RHS.getComplexFloatReal(); 461896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &RHS_i = RHS.getComplexFloatImag(); 461996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &Res_r = Result.getComplexFloatReal(); 462096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &Res_i = Result.getComplexFloatImag(); 462196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 462296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat Den = RHS_r; 462396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Den.multiply(RHS_r, APFloat::rmNearestTiesToEven); 462496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat Tmp = RHS_i; 462596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 462696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Den.add(Tmp, APFloat::rmNearestTiesToEven); 462796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 462896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r = LHS_r; 462996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.multiply(RHS_r, APFloat::rmNearestTiesToEven); 463096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp = LHS_i; 463196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 463296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.add(Tmp, APFloat::rmNearestTiesToEven); 463396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.divide(Den, APFloat::rmNearestTiesToEven); 463496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 463596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i = LHS_i; 463696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.multiply(RHS_r, APFloat::rmNearestTiesToEven); 463796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp = LHS_r; 463896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 463996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.subtract(Tmp, APFloat::rmNearestTiesToEven); 464096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.divide(Den, APFloat::rmNearestTiesToEven); 464196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } else { 4642f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (RHS.getComplexIntReal() == 0 && RHS.getComplexIntImag() == 0) 4643f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E, diag::note_expr_divide_by_zero); 4644f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 464596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara ComplexValue LHS = Result; 464696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APSInt Den = RHS.getComplexIntReal() * RHS.getComplexIntReal() + 464796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara RHS.getComplexIntImag() * RHS.getComplexIntImag(); 464896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntReal() = 464996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara (LHS.getComplexIntReal() * RHS.getComplexIntReal() + 465096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara LHS.getComplexIntImag() * RHS.getComplexIntImag()) / Den; 465196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = 465296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara (LHS.getComplexIntImag() * RHS.getComplexIntReal() - 465396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara LHS.getComplexIntReal() * RHS.getComplexIntImag()) / Den; 465496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 465596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara break; 4656ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 4657ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 4658f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 4659ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson} 4660ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 466196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnarabool ComplexExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 466296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // Get the operand value into 'Result'. 466396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (!Visit(E->getSubExpr())) 466496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 466596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 466696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara switch (E->getOpcode()) { 466796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara default: 4668f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return Error(E); 466996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Extension: 467096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 467196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Plus: 467296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // The result is always just the subexpr. 467396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 467496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Minus: 467596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) { 467696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatReal().changeSign(); 467796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatImag().changeSign(); 467896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 467996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara else { 468096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntReal() = -Result.getComplexIntReal(); 468196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = -Result.getComplexIntImag(); 468296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 468396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 468496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Not: 468596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) 468696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatImag().changeSign(); 468796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara else 468896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = -Result.getComplexIntImag(); 468996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 469096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 469196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara} 469296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 46939ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 4694aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith// Void expression evaluation, primarily for a cast to void on the LHS of a 4695aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith// comma operator 4696aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith//===----------------------------------------------------------------------===// 4697aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith 4698aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smithnamespace { 4699aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smithclass VoidExprEvaluator 4700aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith : public ExprEvaluatorBase<VoidExprEvaluator, bool> { 4701aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smithpublic: 4702aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith VoidExprEvaluator(EvalInfo &Info) : ExprEvaluatorBaseTy(Info) {} 4703aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith 4704aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith bool Success(const CCValue &V, const Expr *e) { return true; } 4705aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith 4706aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith bool VisitCastExpr(const CastExpr *E) { 4707aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith switch (E->getCastKind()) { 4708aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith default: 4709aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith return ExprEvaluatorBaseTy::VisitCastExpr(E); 4710aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith case CK_ToVoid: 4711aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith VisitIgnoredValue(E->getSubExpr()); 4712aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith return true; 4713aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith } 4714aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith } 4715aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith}; 4716aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith} // end anonymous namespace 4717aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith 4718aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smithstatic bool EvaluateVoid(const Expr *E, EvalInfo &Info) { 4719aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith assert(E->isRValue() && E->getType()->isVoidType()); 4720aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith return VoidExprEvaluator(Info).Visit(E); 4721aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith} 4722aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith 4723aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith//===----------------------------------------------------------------------===// 472451f4708c00110940ca3f337961915f2ca1668375Richard Smith// Top level Expr::EvaluateAsRValue method. 4725f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 4726f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 472747a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smithstatic bool Evaluate(CCValue &Result, EvalInfo &Info, const Expr *E) { 4728c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // In C, function designators are not lvalues, but we evaluate them as if they 4729c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith // are. 4730c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (E->isGLValue() || E->getType()->isFunctionType()) { 4731c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith LValue LV; 4732c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith if (!EvaluateLValue(E, LV, Info)) 4733c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return false; 4734c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith LV.moveInto(Result); 4735c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith } else if (E->getType()->isVectorType()) { 47361e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (!EvaluateVector(E, Result, Info)) 473759b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 4738575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor } else if (E->getType()->isIntegralOrEnumerationType()) { 47391e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (!IntExprEvaluator(Info, Result).Visit(E)) 47406dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 4741efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->hasPointerRepresentation()) { 4742efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 4743efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(E, LV, Info)) 47446dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 47451e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith LV.moveInto(Result); 4746efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isRealFloatingType()) { 4747efdb83e26f9a1fd2566afe54461216cd84814d42John McCall llvm::APFloat F(0.0); 4748efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateFloat(E, F, Info)) 47496dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 475047a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith Result = CCValue(F); 4751efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isAnyComplexType()) { 4752efdb83e26f9a1fd2566afe54461216cd84814d42John McCall ComplexValue C; 4753efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateComplex(E, C, Info)) 4754660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 47551e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith C.moveInto(Result); 475669c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith } else if (E->getType()->isMemberPointerType()) { 4757e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith MemberPtr P; 4758e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (!EvaluateMemberPointer(E, P, Info)) 4759e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return false; 4760e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith P.moveInto(Result); 4761e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith return true; 476269c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith } else if (E->getType()->isArrayType() && E->getType()->isLiteralType()) { 4763180f47959a066795cc0f409433023af448bb0328Richard Smith LValue LV; 47641bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith LV.set(E, Info.CurrentCall); 4765180f47959a066795cc0f409433023af448bb0328Richard Smith if (!EvaluateArray(E, LV, Info.CurrentCall->Temporaries[E], Info)) 4766cc5d4f637cdf83adc174b96d2bfe27cef1cf0f36Richard Smith return false; 4767180f47959a066795cc0f409433023af448bb0328Richard Smith Result = Info.CurrentCall->Temporaries[E]; 476869c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith } else if (E->getType()->isRecordType() && E->getType()->isLiteralType()) { 4769180f47959a066795cc0f409433023af448bb0328Richard Smith LValue LV; 47701bf9a9e6a5bdc0de7939908855dcddf46b661800Richard Smith LV.set(E, Info.CurrentCall); 4771180f47959a066795cc0f409433023af448bb0328Richard Smith if (!EvaluateRecord(E, LV, Info.CurrentCall->Temporaries[E], Info)) 4772180f47959a066795cc0f409433023af448bb0328Richard Smith return false; 4773180f47959a066795cc0f409433023af448bb0328Richard Smith Result = Info.CurrentCall->Temporaries[E]; 4774aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith } else if (E->getType()->isVoidType()) { 4775c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith if (Info.getLangOpts().CPlusPlus0x) 4776c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.CCEDiag(E->getExprLoc(), diag::note_constexpr_nonliteral) 4777c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith << E->getType(); 4778c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith else 4779c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.CCEDiag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 4780aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith if (!EvaluateVoid(E, Info)) 4781aa9c3503867bc52e1f61c4da676116db1b1cdf01Richard Smith return false; 4782c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith } else if (Info.getLangOpts().CPlusPlus0x) { 4783c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith Info.Diag(E->getExprLoc(), diag::note_constexpr_nonliteral) << E->getType(); 4784c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith return false; 4785f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } else { 4786dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Info.Diag(E->getExprLoc(), diag::note_invalid_subexpr_in_const_expr); 4787660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 4788f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 4789660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 4790660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return true; 4791660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump} 4792660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 479369c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith/// EvaluateConstantExpression - Evaluate an expression as a constant expression 479469c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith/// in-place in an APValue. In some cases, the in-place evaluation is essential, 479569c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith/// since later initializers for an object can indirectly refer to subobjects 479669c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith/// which were initialized earlier. 479769c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smithstatic bool EvaluateConstantExpression(APValue &Result, EvalInfo &Info, 4798c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith const LValue &This, const Expr *E, 4799c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CheckConstantExpressionKind CCEK) { 480069c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith if (E->isRValue() && E->getType()->isLiteralType()) { 480169c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith // Evaluate arrays and record types in-place, so that later initializers can 480269c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith // refer to earlier-initialized members of the object. 4803180f47959a066795cc0f409433023af448bb0328Richard Smith if (E->getType()->isArrayType()) 4804180f47959a066795cc0f409433023af448bb0328Richard Smith return EvaluateArray(E, This, Result, Info); 4805180f47959a066795cc0f409433023af448bb0328Richard Smith else if (E->getType()->isRecordType()) 4806180f47959a066795cc0f409433023af448bb0328Richard Smith return EvaluateRecord(E, This, Result, Info); 480769c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith } 480869c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith 480969c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith // For any other type, in-place evaluation is unimportant. 481069c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith CCValue CoreConstResult; 481169c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith return Evaluate(CoreConstResult, Info, E) && 4812c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CheckConstantExpression(Info, E, CoreConstResult, Result, CCEK); 481369c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith} 481469c2c50498dadfa6bb99baba52187e3cfa0ac78aRichard Smith 4815f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith/// EvaluateAsRValue - Try to evaluate this expression, performing an implicit 4816f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith/// lvalue-to-rvalue cast if it is an lvalue. 4817f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithstatic bool EvaluateAsRValue(EvalInfo &Info, const Expr *E, APValue &Result) { 4818f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith CCValue Value; 4819f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!::Evaluate(Value, Info, E)) 4820f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 4821f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 4822f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (E->isGLValue()) { 4823f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith LValue LV; 4824f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith LV.setFrom(Value); 4825f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!HandleLValueToRValueConversion(Info, E, E->getType(), LV, Value)) 4826f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 4827f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 4828f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 4829f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // Check this core constant expression is a constant expression, and if so, 4830f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith // convert it to one. 4831f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return CheckConstantExpression(Info, E, Value, Result); 4832f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith} 4833c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith 483451f4708c00110940ca3f337961915f2ca1668375Richard Smith/// EvaluateAsRValue - Return true if this is a constant which we can fold using 483556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall/// any crazy technique (that has nothing to do with language standards) that 483656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall/// we want to. If this function returns true, it returns the folded constant 4837c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// in Result. If this expression is a glvalue, an lvalue-to-rvalue conversion 4838c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith/// will be applied to the result. 483951f4708c00110940ca3f337961915f2ca1668375Richard Smithbool Expr::EvaluateAsRValue(EvalResult &Result, const ASTContext &Ctx) const { 4840ee19f43bf8973bfcccb7329e32a4198641767949Richard Smith // Fast-path evaluations of integer literals, since we sometimes see files 4841ee19f43bf8973bfcccb7329e32a4198641767949Richard Smith // containing vast quantities of these. 4842ee19f43bf8973bfcccb7329e32a4198641767949Richard Smith if (const IntegerLiteral *L = dyn_cast<IntegerLiteral>(this)) { 4843ee19f43bf8973bfcccb7329e32a4198641767949Richard Smith Result.Val = APValue(APSInt(L->getValue(), 4844ee19f43bf8973bfcccb7329e32a4198641767949Richard Smith L->getType()->isUnsignedIntegerType())); 4845ee19f43bf8973bfcccb7329e32a4198641767949Richard Smith return true; 4846ee19f43bf8973bfcccb7329e32a4198641767949Richard Smith } 4847ee19f43bf8973bfcccb7329e32a4198641767949Richard Smith 48481445bbacf4c8de5f208ff4ccb302424a4d9e233eRichard Smith // FIXME: Evaluating initializers for large arrays can cause performance 48491445bbacf4c8de5f208ff4ccb302424a4d9e233eRichard Smith // problems, and we don't use such values yet. Once we have a more efficient 48501445bbacf4c8de5f208ff4ccb302424a4d9e233eRichard Smith // array representation, this should be reinstated, and used by CodeGen. 4851e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith // The same problem affects large records. 4852e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith if (isRValue() && (getType()->isArrayType() || getType()->isRecordType()) && 4853e24f5fc8c763f1b5536b8d70dd510ca959db3a80Richard Smith !Ctx.getLangOptions().CPlusPlus0x) 48541445bbacf4c8de5f208ff4ccb302424a4d9e233eRichard Smith return false; 48551445bbacf4c8de5f208ff4ccb302424a4d9e233eRichard Smith 4856180f47959a066795cc0f409433023af448bb0328Richard Smith // FIXME: If this is the initializer for an lvalue, pass that in. 4857f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith EvalInfo Info(Ctx, Result); 4858f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return ::EvaluateAsRValue(Info, this, Result.Val); 485956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall} 486056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 48614ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::EvaluateAsBooleanCondition(bool &Result, 48624ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad const ASTContext &Ctx) const { 4863c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith EvalResult Scratch; 486451f4708c00110940ca3f337961915f2ca1668375Richard Smith return EvaluateAsRValue(Scratch, Ctx) && 4865177dce777596e68d111d6d3e6046f3ddfc96bd07Richard Smith HandleConversionToBool(CCValue(Scratch.Val, CCValue::GlobalValue()), 486647a1eed1cdd36edbefc318f29be6c0f3212b0c41Richard Smith Result); 4867cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall} 4868cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall 4869a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smithbool Expr::EvaluateAsInt(APSInt &Result, const ASTContext &Ctx) const { 4870c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith EvalResult ExprResult; 487151f4708c00110940ca3f337961915f2ca1668375Richard Smith if (!EvaluateAsRValue(ExprResult, Ctx) || ExprResult.HasSideEffects || 4872f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith !ExprResult.Val.isInt()) 4873c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return false; 4874f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 4875c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith Result = ExprResult.Val.getInt(); 4876c49bd11f96c2378969822f1f1b814ffa8f2bfee4Richard Smith return true; 4877a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith} 4878a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith 48794ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::EvaluateAsLValue(EvalResult &Result, const ASTContext &Ctx) const { 48801b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson EvalInfo Info(Ctx, Result); 48811b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 4882efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 48839a17a680c74ef661bf3d864029adf7e74d9cb5b8Richard Smith return EvaluateLValue(this, LV, Info) && !Result.HasSideEffects && 4884c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CheckLValueConstantExpression(Info, this, LV, Result.Val, 4885c1c5f27c64dfc3332d53ad30e44d626e4f9afac3Richard Smith CCEK_Constant); 4886b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman} 4887b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 4888099e7f647ccda915513f2b2ec53352dc756082d3Richard Smithbool Expr::EvaluateAsInitializer(APValue &Value, const ASTContext &Ctx, 4889099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith const VarDecl *VD, 4890099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith llvm::SmallVectorImpl<PartialDiagnosticAt> &Notes) const { 4891099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith Expr::EvalStatus EStatus; 4892099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith EStatus.Diag = &Notes; 4893099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith 4894099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith EvalInfo InitInfo(Ctx, EStatus); 4895099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith InitInfo.setEvaluatingDecl(VD, Value); 4896099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith 4897099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith LValue LVal; 4898099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith LVal.set(VD); 4899099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith 4900099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith return EvaluateConstantExpression(Value, InitInfo, LVal, this) && 4901099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith !EStatus.HasSideEffects; 4902099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith} 4903099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith 490451f4708c00110940ca3f337961915f2ca1668375Richard Smith/// isEvaluatable - Call EvaluateAsRValue to see if this expression can be 490551f4708c00110940ca3f337961915f2ca1668375Richard Smith/// constant folded, but discard the result. 49064ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::isEvaluatable(const ASTContext &Ctx) const { 49074fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson EvalResult Result; 490851f4708c00110940ca3f337961915f2ca1668375Richard Smith return EvaluateAsRValue(Result, Ctx) && !Result.HasSideEffects; 490945b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner} 491051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 49114ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::HasSideEffects(const ASTContext &Ctx) const { 49121e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith return HasSideEffect(Ctx).Visit(this); 4913393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian} 4914393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian 4915a6b8b2c09610b8bc4330e948ece8b940c2386406Richard SmithAPSInt Expr::EvaluateKnownConstInt(const ASTContext &Ctx) const { 49161c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 491751f4708c00110940ca3f337961915f2ca1668375Richard Smith bool Result = EvaluateAsRValue(EvalResult, Ctx); 4918c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)Result; 491951fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson assert(Result && "Could not evaluate expression"); 49201c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(EvalResult.Val.isInt() && "Expression did not evaluate to integer"); 492151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 49221c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson return EvalResult.Val.getInt(); 492351fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson} 4924d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 4925e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara bool Expr::EvalResult::isGlobalLValue() const { 4926e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara assert(Val.isLValue()); 4927e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return IsGlobalLValue(Val.getLValueBase()); 4928e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara } 4929e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 4930e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 4931d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// isIntegerConstantExpr - this recursive routine will test if an expression is 4932d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// an integer constant expression. 4933d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 4934d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Pass up a reason why! Invalid operation in i-c-e, division by zero, 4935d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// comma, etc 4936d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// 4937d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Handle offsetof. Two things to do: Handle GCC's __builtin_offsetof 4938d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// to support gcc 4.0+ and handle the idiom GCC recognizes with a null pointer 4939d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// cast+dereference. 4940d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 4941d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// CheckICE - This function does the fundamental ICE checking: the returned 4942d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// ICEDiag contains a Val of 0, 1, or 2, and a possibly null SourceLocation. 4943d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Note that to reduce code duplication, this helper does no evaluation 4944d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// itself; the caller checks whether the expression is evaluatable, and 4945d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// in the rare cases where CheckICE actually cares about the evaluated 4946d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// value, it calls into Evalute. 4947d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 4948d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Meanings of Val: 494951f4708c00110940ca3f337961915f2ca1668375Richard Smith// 0: This expression is an ICE. 4950d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 1: This expression is not an ICE, but if it isn't evaluated, it's 4951d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// a legal subexpression for an ICE. This return value is used to handle 4952d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// the comma operator in C99 mode. 4953d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 2: This expression is not an ICE, and is not a legal subexpression for one. 4954d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 49553c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 49563c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 4957d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstruct ICEDiag { 4958d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall unsigned Val; 4959d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall SourceLocation Loc; 4960d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 4961d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall public: 4962d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag(unsigned v, SourceLocation l) : Val(v), Loc(l) {} 4963d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag() : Val(0) {} 4964d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall}; 4965d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 49663c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 49673c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 49683c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmanstatic ICEDiag NoDiag() { return ICEDiag(); } 4969d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 4970d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckEvalInICE(const Expr* E, ASTContext &Ctx) { 4971d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 497251f4708c00110940ca3f337961915f2ca1668375Richard Smith if (!E->EvaluateAsRValue(EVResult, Ctx) || EVResult.HasSideEffects || 4973d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 4974d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 4975d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 4976d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 4977d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 4978d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 4979d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckICE(const Expr* E, ASTContext &Ctx) { 4980d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(!E->isValueDependent() && "Should not see value dependent exprs!"); 49812ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!E->getType()->isIntegralOrEnumerationType()) { 4982d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 4983d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 4984d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 4985d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (E->getStmtClass()) { 498663c00d7f35fa060c0a446c9df3a4402d9c7757feJohn McCall#define ABSTRACT_STMT(Node) 4987d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define STMT(Node, Base) case Expr::Node##Class: 4988d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define EXPR(Node, Base) 4989d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#include "clang/AST/StmtNodes.inc" 4990d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::PredefinedExprClass: 4991d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::FloatingLiteralClass: 4992d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImaginaryLiteralClass: 4993d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StringLiteralClass: 4994d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ArraySubscriptExprClass: 4995d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::MemberExprClass: 4996d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundAssignOperatorClass: 4997d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundLiteralExprClass: 4998d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ExtVectorElementExprClass: 4999d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DesignatedInitExprClass: 5000d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitValueInitExprClass: 5001d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenListExprClass: 5002d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::VAArgExprClass: 5003d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::AddrLabelExprClass: 5004d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StmtExprClass: 5005d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXMemberCallExprClass: 5006e08ce650a2b02410eddd1f60a4aa6b3d4be71e73Peter Collingbourne case Expr::CUDAKernelCallExprClass: 5007d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDynamicCastExprClass: 5008d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTypeidExprClass: 50099be88403e965cc49af76c9d33d818781d44b333eFrancois Pichet case Expr::CXXUuidofExprClass: 5010d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNullPtrLiteralExprClass: 5011d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThisExprClass: 5012d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThrowExprClass: 5013d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNewExprClass: 5014d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDeleteExprClass: 5015d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXPseudoDestructorExprClass: 5016d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedLookupExprClass: 5017d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DependentScopeDeclRefExprClass: 5018d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXConstructExprClass: 5019d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBindTemporaryExprClass: 50204765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall case Expr::ExprWithCleanupsClass: 5021d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTemporaryObjectExprClass: 5022d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXUnresolvedConstructExprClass: 5023d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDependentScopeMemberExprClass: 5024d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedMemberExprClass: 5025d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCStringLiteralClass: 5026d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCEncodeExprClass: 5027d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCMessageExprClass: 5028d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCSelectorExprClass: 5029d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCProtocolExprClass: 5030d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIvarRefExprClass: 5031d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCPropertyRefExprClass: 5032d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIsaExprClass: 5033d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ShuffleVectorExprClass: 5034d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockExprClass: 5035d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockDeclRefExprClass: 5036d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::NoStmtClass: 50377cd7d1ad33fdf49eef83942e8855fe20d95aa1b9John McCall case Expr::OpaqueValueExprClass: 5038be230c36e32142cbdcdbe9c97511d097beeecbabDouglas Gregor case Expr::PackExpansionExprClass: 5039c7793c73ba8a343de3f2552d984851985a46f159Douglas Gregor case Expr::SubstNonTypeTemplateParmPackExprClass: 504061eee0ca33b29e102f11bab77c8b74cc00e2392bTanya Lattner case Expr::AsTypeExprClass: 5041f85e193739c953358c865005855253af4f68a497John McCall case Expr::ObjCIndirectCopyRestoreExprClass: 504203e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor case Expr::MaterializeTemporaryExprClass: 50434b9c2d235fb9449e249d74f48ecfec601650de93John McCall case Expr::PseudoObjectExprClass: 5044276b061970939293f1abaf694bd3ef05b2cbda79Eli Friedman case Expr::AtomicExprClass: 5045cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl case Expr::InitListExprClass: 5046cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl return ICEDiag(2, E->getLocStart()); 5047cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl 5048ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor case Expr::SizeOfPackExprClass: 5049d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::GNUNullExprClass: 5050d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // GCC considers the GNU __null value to be an integral constant expression. 5051d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 5052d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 505391a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall case Expr::SubstNonTypeTemplateParmExprClass: 505491a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall return 505591a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall CheckICE(cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement(), Ctx); 505691a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall 5057d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenExprClass: 5058d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ParenExpr>(E)->getSubExpr(), Ctx); 5059f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne case Expr::GenericSelectionExprClass: 5060f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne return CheckICE(cast<GenericSelectionExpr>(E)->getResultExpr(), Ctx); 5061d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::IntegerLiteralClass: 5062d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CharacterLiteralClass: 5063d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBoolLiteralExprClass: 5064ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor case Expr::CXXScalarValueInitExprClass: 5065d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryTypeTraitExprClass: 50666ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet case Expr::BinaryTypeTraitExprClass: 506721ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley case Expr::ArrayTypeTraitExprClass: 5068552622067dc45013d240f73952fece703f5e63bdJohn Wiegley case Expr::ExpressionTraitExprClass: 50692e156225a29407a50dd19041aa5750171ad44ea3Sebastian Redl case Expr::CXXNoexceptExprClass: 5070d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 5071d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CallExprClass: 50726cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt case Expr::CXXOperatorCallExprClass: { 507305830143fa8c70b8bc46c96b93018455d8a2ca92Richard Smith // C99 6.6/3 allows function calls within unevaluated subexpressions of 507405830143fa8c70b8bc46c96b93018455d8a2ca92Richard Smith // constant expressions, but they can never be ICEs because an ICE cannot 507505830143fa8c70b8bc46c96b93018455d8a2ca92Richard Smith // contain an operand of (pointer to) function type. 5076d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const CallExpr *CE = cast<CallExpr>(E); 5077180f47959a066795cc0f409433023af448bb0328Richard Smith if (CE->isBuiltinCall()) 5078d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 5079d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 5080d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5081d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DeclRefExprClass: 5082d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<EnumConstantDecl>(cast<DeclRefExpr>(E)->getDecl())) 5083d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 508403f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith if (Ctx.getLangOptions().CPlusPlus && IsConstNonVolatile(E->getType())) { 5085d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl(); 5086d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 5087d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Parameter variables are never constants. Without this check, 5088d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // getAnyInitializer() can find a default argument, which leads 5089d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to chaos. 5090d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<ParmVarDecl>(D)) 5091d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 5092d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 5093d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C++ 7.1.5.1p2 5094d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // A variable of non-volatile const-qualified integral or enumeration 5095d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // type initialized by an ICE can be used in ICEs. 5096d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const VarDecl *Dcl = dyn_cast<VarDecl>(D)) { 5097db1822c6de43ff4aa5fa00234bf8222f6f4816e8Richard Smith if (!Dcl->getType()->isIntegralOrEnumerationType()) 5098db1822c6de43ff4aa5fa00234bf8222f6f4816e8Richard Smith return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 5099db1822c6de43ff4aa5fa00234bf8222f6f4816e8Richard Smith 5100099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith const VarDecl *VD; 5101099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith // Look for a declaration of this variable that has an initializer, and 5102099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith // check whether it is an ICE. 5103099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith if (Dcl->getAnyInitializer(VD) && VD->checkInitIsICE()) 5104099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith return NoDiag(); 5105099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith else 5106099e7f647ccda915513f2b2ec53352dc756082d3Richard Smith return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 5107d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5108d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5109d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 5110d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryOperatorClass: { 5111d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const UnaryOperator *Exp = cast<UnaryOperator>(E); 5112d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 51132de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PostInc: 51142de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PostDec: 51152de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PreInc: 51162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PreDec: 51172de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_AddrOf: 51182de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Deref: 511905830143fa8c70b8bc46c96b93018455d8a2ca92Richard Smith // C99 6.6/3 allows increment and decrement within unevaluated 512005830143fa8c70b8bc46c96b93018455d8a2ca92Richard Smith // subexpressions of constant expressions, but they can never be ICEs 512105830143fa8c70b8bc46c96b93018455d8a2ca92Richard Smith // because an ICE cannot contain an lvalue operand. 5122d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 51232de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: 51242de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_LNot: 51252de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 51262de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 51272de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 51282de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Real: 51292de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Imag: 5130d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(Exp->getSubExpr(), Ctx); 5131d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5132d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 5133d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // OffsetOf falls through here. 5134d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5135d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::OffsetOfExprClass: { 5136d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that per C99, offsetof must be an ICE. And AFAIK, using 513751f4708c00110940ca3f337961915f2ca1668375Richard Smith // EvaluateAsRValue matches the proposed gcc behavior for cases like 513805830143fa8c70b8bc46c96b93018455d8a2ca92Richard Smith // "offsetof(struct s{int x[4];}, x[1.0])". This doesn't affect 5139d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // compliance: we should warn earlier for offsetof expressions with 5140d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // array subscripts that aren't ICEs, and if the array subscripts 5141d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // are ICEs, the value of the offsetof must be an integer constant. 5142d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 5143d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5144f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case Expr::UnaryExprOrTypeTraitExprClass: { 5145f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne const UnaryExprOrTypeTraitExpr *Exp = cast<UnaryExprOrTypeTraitExpr>(E); 5146f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if ((Exp->getKind() == UETT_SizeOf) && 5147f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Exp->getTypeOfArgument()->isVariableArrayType()) 5148d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 5149d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 5150d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5151d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BinaryOperatorClass: { 5152d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const BinaryOperator *Exp = cast<BinaryOperator>(E); 5153d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 51542de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_PtrMemD: 51552de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_PtrMemI: 51562de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Assign: 51572de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_MulAssign: 51582de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_DivAssign: 51592de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_RemAssign: 51602de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AddAssign: 51612de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_SubAssign: 51622de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShlAssign: 51632de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShrAssign: 51642de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AndAssign: 51652de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_XorAssign: 51662de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_OrAssign: 516705830143fa8c70b8bc46c96b93018455d8a2ca92Richard Smith // C99 6.6/3 allows assignments within unevaluated subexpressions of 516805830143fa8c70b8bc46c96b93018455d8a2ca92Richard Smith // constant expressions, but they can never be ICEs because an ICE cannot 516905830143fa8c70b8bc46c96b93018455d8a2ca92Richard Smith // contain an lvalue operand. 5170d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 5171d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 51722de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 51732de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 51742de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Rem: 51752de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 51762de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 51772de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shl: 51782de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shr: 51792de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: 51802de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: 51812de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: 51822de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: 51832de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: 51842de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: 51852de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_And: 51862de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Xor: 51872de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Or: 51882de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Comma: { 5189d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 5190d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 51912de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Exp->getOpcode() == BO_Div || 51922de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall Exp->getOpcode() == BO_Rem) { 519351f4708c00110940ca3f337961915f2ca1668375Richard Smith // EvaluateAsRValue gives an error for undefined Div/Rem, so make sure 5194d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // we don't evaluate one. 51953b332ab132fa85c83833d74d400f6e126f52fbd2John McCall if (LHSResult.Val == 0 && RHSResult.Val == 0) { 5196a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith llvm::APSInt REval = Exp->getRHS()->EvaluateKnownConstInt(Ctx); 5197d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval == 0) 5198d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 5199d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval.isSigned() && REval.isAllOnesValue()) { 5200a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith llvm::APSInt LEval = Exp->getLHS()->EvaluateKnownConstInt(Ctx); 5201d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LEval.isMinSignedValue()) 5202d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 5203d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5204d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5205d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 52062de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Exp->getOpcode() == BO_Comma) { 5207d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Ctx.getLangOptions().C99) { 5208d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C99 6.6p3 introduces a strange edge case: comma can be in an ICE 5209d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // if it isn't evaluated. 5210d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 0) 5211d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 5212d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } else { 5213d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // In both C89 and C++, commas in ICEs are illegal. 5214d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 5215d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5216d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5217d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 5218d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 5219d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 5220d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 52212de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LAnd: 52222de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LOr: { 5223d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 5224d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 5225d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 1) { 5226d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the RHS has a comma "side-effect"; we need 5227d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to actually check the condition to see whether the side 5228d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // with the comma is evaluated. 52292de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if ((Exp->getOpcode() == BO_LAnd) != 5230a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith (Exp->getLHS()->EvaluateKnownConstInt(Ctx) == 0)) 5231d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 5232d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 5233d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5234d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 5235d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 5236d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 5237d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 5238d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5239d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5240d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5241d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitCastExprClass: 5242d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CStyleCastExprClass: 5243d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXFunctionalCastExprClass: 5244d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXStaticCastExprClass: 5245d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXReinterpretCastExprClass: 524632cb47174304bc7ec11478b9497c4e10f48273d9Richard Smith case Expr::CXXConstCastExprClass: 5247f85e193739c953358c865005855253af4f68a497John McCall case Expr::ObjCBridgedCastExprClass: { 5248d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const Expr *SubExpr = cast<CastExpr>(E)->getSubExpr(); 52492116b144cf07f2574d20517187eb8863645376ebRichard Smith if (isa<ExplicitCastExpr>(E)) { 52502116b144cf07f2574d20517187eb8863645376ebRichard Smith if (const FloatingLiteral *FL 52512116b144cf07f2574d20517187eb8863645376ebRichard Smith = dyn_cast<FloatingLiteral>(SubExpr->IgnoreParenImpCasts())) { 52522116b144cf07f2574d20517187eb8863645376ebRichard Smith unsigned DestWidth = Ctx.getIntWidth(E->getType()); 52532116b144cf07f2574d20517187eb8863645376ebRichard Smith bool DestSigned = E->getType()->isSignedIntegerOrEnumerationType(); 52542116b144cf07f2574d20517187eb8863645376ebRichard Smith APSInt IgnoredVal(DestWidth, !DestSigned); 52552116b144cf07f2574d20517187eb8863645376ebRichard Smith bool Ignored; 52562116b144cf07f2574d20517187eb8863645376ebRichard Smith // If the value does not fit in the destination type, the behavior is 52572116b144cf07f2574d20517187eb8863645376ebRichard Smith // undefined, so we are not required to treat it as a constant 52582116b144cf07f2574d20517187eb8863645376ebRichard Smith // expression. 52592116b144cf07f2574d20517187eb8863645376ebRichard Smith if (FL->getValue().convertToInteger(IgnoredVal, 52602116b144cf07f2574d20517187eb8863645376ebRichard Smith llvm::APFloat::rmTowardZero, 52612116b144cf07f2574d20517187eb8863645376ebRichard Smith &Ignored) & APFloat::opInvalidOp) 52622116b144cf07f2574d20517187eb8863645376ebRichard Smith return ICEDiag(2, E->getLocStart()); 52632116b144cf07f2574d20517187eb8863645376ebRichard Smith return NoDiag(); 52642116b144cf07f2574d20517187eb8863645376ebRichard Smith } 52652116b144cf07f2574d20517187eb8863645376ebRichard Smith } 5266eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman switch (cast<CastExpr>(E)->getCastKind()) { 5267eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman case CK_LValueToRValue: 5268eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman case CK_NoOp: 5269eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman case CK_IntegralToBoolean: 5270eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman case CK_IntegralCast: 5271d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(SubExpr, Ctx); 5272eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman default: 5273eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman return ICEDiag(2, E->getLocStart()); 5274eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman } 5275d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 527656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Expr::BinaryConditionalOperatorClass: { 527756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall const BinaryConditionalOperator *Exp = cast<BinaryConditionalOperator>(E); 527856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall ICEDiag CommonResult = CheckICE(Exp->getCommon(), Ctx); 527956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (CommonResult.Val == 2) return CommonResult; 528056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall ICEDiag FalseResult = CheckICE(Exp->getFalseExpr(), Ctx); 528156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (FalseResult.Val == 2) return FalseResult; 528256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (CommonResult.Val == 1) return CommonResult; 528356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (FalseResult.Val == 1 && 5284a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith Exp->getCommon()->EvaluateKnownConstInt(Ctx) == 0) return NoDiag(); 528556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall return FalseResult; 528656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 5287d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ConditionalOperatorClass: { 5288d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const ConditionalOperator *Exp = cast<ConditionalOperator>(E); 5289d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // If the condition (ignoring parens) is a __builtin_constant_p call, 5290d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // then only the true side is actually considered in an integer constant 5291d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // expression, and it is fully evaluated. This is an important GNU 5292d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // extension. See GCC PR38377 for discussion. 5293d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const CallExpr *CallCE 5294d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall = dyn_cast<CallExpr>(Exp->getCond()->IgnoreParenCasts())) 5295180f47959a066795cc0f409433023af448bb0328Richard Smith if (CallCE->isBuiltinCall() == Builtin::BI__builtin_constant_p) { 5296d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 529751f4708c00110940ca3f337961915f2ca1668375Richard Smith if (!E->EvaluateAsRValue(EVResult, Ctx) || EVResult.HasSideEffects || 5298d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 5299d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 5300d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5301d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 5302d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5303d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag CondResult = CheckICE(Exp->getCond(), Ctx); 5304d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 2) 5305d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 530663fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 5307f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith ICEDiag TrueResult = CheckICE(Exp->getTrueExpr(), Ctx); 5308f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith ICEDiag FalseResult = CheckICE(Exp->getFalseExpr(), Ctx); 530963fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 5310d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 2) 5311d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 5312d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (FalseResult.Val == 2) 5313d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 5314d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 1) 5315d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 5316d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 0 && FalseResult.Val == 0) 5317d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 5318d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the diagnostics depend on which side is evaluated 5319d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that if we get here, CondResult is 0, and at least one of 5320d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // TrueResult and FalseResult is non-zero. 5321a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith if (Exp->getCond()->EvaluateKnownConstInt(Ctx) == 0) { 5322d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 5323d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5324d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 5325d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5326d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDefaultArgExprClass: 5327d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<CXXDefaultArgExpr>(E)->getExpr(), Ctx); 5328d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ChooseExprClass: { 5329d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ChooseExpr>(E)->getChosenSubExpr(Ctx), Ctx); 5330d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5331d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5332d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 5333d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Silence a GCC warning 5334d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 5335d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 5336d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 5337f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith/// Evaluate an expression as a C++11 integral constant expression. 5338f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithstatic bool EvaluateCPlusPlus11IntegralConstantExpr(ASTContext &Ctx, 5339f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith const Expr *E, 5340f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith llvm::APSInt *Value, 5341f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith SourceLocation *Loc) { 5342f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!E->getType()->isIntegralOrEnumerationType()) { 5343f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (Loc) *Loc = E->getExprLoc(); 5344f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 5345f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 5346f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 5347f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith Expr::EvalResult Result; 5348dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith llvm::SmallVector<PartialDiagnosticAt, 8> Diags; 5349dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith Result.Diag = &Diags; 5350dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith EvalInfo Info(Ctx, Result); 5351dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith 5352dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith bool IsICE = EvaluateAsRValue(Info, E, Result.Val); 5353dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith if (!Diags.empty()) { 5354dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith IsICE = false; 5355dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith if (Loc) *Loc = Diags[0].first; 5356dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith } else if (!IsICE && Loc) { 5357dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith *Loc = E->getExprLoc(); 5358f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith } 5359dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith 5360dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith if (!IsICE) 5361dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith return false; 5362dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith 5363dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith assert(Result.Val.isInt() && "pointer cast to int is not an ICE"); 5364dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith if (Value) *Value = Result.Val.getInt(); 5365dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smith return true; 5366f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith} 5367f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 5368dd1f29b6d686899bfd033f26e16cb1621e5549e8Richard Smithbool Expr::isIntegerConstantExpr(ASTContext &Ctx, SourceLocation *Loc) const { 5369f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (Ctx.getLangOptions().CPlusPlus0x) 5370f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return EvaluateCPlusPlus11IntegralConstantExpr(Ctx, this, 0, Loc); 5371f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 5372d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag d = CheckICE(this, Ctx); 5373d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (d.Val != 0) { 5374d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Loc) *Loc = d.Loc; 5375d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return false; 5376d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 5377f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return true; 5378f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith} 5379f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 5380f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smithbool Expr::isIntegerConstantExpr(llvm::APSInt &Value, ASTContext &Ctx, 5381f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith SourceLocation *Loc, bool isEvaluated) const { 5382f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (Ctx.getLangOptions().CPlusPlus0x) 5383f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return EvaluateCPlusPlus11IntegralConstantExpr(Ctx, this, &Value, Loc); 5384f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith 5385f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!isIntegerConstantExpr(Ctx, Loc)) 5386f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith return false; 5387f48fdb0937e67f691393f9ffdf75653e5128ea13Richard Smith if (!EvaluateAsInt(Value, Ctx)) 5388d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm_unreachable("ICE cannot be evaluated!"); 5389d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return true; 5390d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 5391