ExprConstant.cpp revision 03e80030515c800d1ab44125b9052dfffd1bd04c
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 { 46c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer struct EvalInfo { 47c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer const ASTContext &Ctx; 481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 49c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer /// EvalResult - Contains information about the evaluation. 50c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer Expr::EvalResult &EvalResult; 51f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson 52c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer typedef llvm::DenseMap<const OpaqueValueExpr*, APValue> MapTy; 53c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer MapTy OpaqueValues; 54c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer const APValue *getOpaqueValue(const OpaqueValueExpr *e) const { 55c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer MapTy::const_iterator i = OpaqueValues.find(e); 56c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer if (i == OpaqueValues.end()) return 0; 57c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer return &i->second; 58c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer } 5956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 60c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer EvalInfo(const ASTContext &ctx, Expr::EvalResult &evalresult) 61c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer : Ctx(ctx), EvalResult(evalresult) {} 62c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer }; 6387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 64f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall struct ComplexValue { 65f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall private: 66f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool IsInt; 67f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 68f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall public: 69f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt IntReal, IntImag; 70f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat FloatReal, FloatImag; 71f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 72f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue() : FloatReal(APFloat::Bogus), FloatImag(APFloat::Bogus) {} 73f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 74f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall void makeComplexFloat() { IsInt = false; } 75f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool isComplexFloat() const { return !IsInt; } 76f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat &getComplexFloatReal() { return FloatReal; } 77f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat &getComplexFloatImag() { return FloatImag; } 78f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 79f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall void makeComplexInt() { IsInt = true; } 80f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool isComplexInt() const { return IsInt; } 81f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt &getComplexIntReal() { return IntReal; } 82f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt &getComplexIntImag() { return IntImag; } 83f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 8456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall void moveInto(APValue &v) const { 85f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (isComplexFloat()) 86f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall v = APValue(FloatReal, FloatImag); 87f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall else 88f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall v = APValue(IntReal, IntImag); 89f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall } 9056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall void setFrom(const APValue &v) { 9156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall assert(v.isComplexFloat() || v.isComplexInt()); 9256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (v.isComplexFloat()) { 9356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall makeComplexFloat(); 9456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall FloatReal = v.getComplexFloatReal(); 9556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall FloatImag = v.getComplexFloatImag(); 9656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } else { 9756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall makeComplexInt(); 9856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall IntReal = v.getComplexIntReal(); 9956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall IntImag = v.getComplexIntImag(); 10056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 10156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 102f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall }; 103efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 104efdb83e26f9a1fd2566afe54461216cd84814d42John McCall struct LValue { 1058cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr *Base; 106efdb83e26f9a1fd2566afe54461216cd84814d42John McCall CharUnits Offset; 107efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 1088cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr *getLValueBase() { return Base; } 109efdb83e26f9a1fd2566afe54461216cd84814d42John McCall CharUnits getLValueOffset() { return Offset; } 110efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 11156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall void moveInto(APValue &v) const { 112efdb83e26f9a1fd2566afe54461216cd84814d42John McCall v = APValue(Base, Offset); 113efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 11456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall void setFrom(const APValue &v) { 11556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall assert(v.isLValue()); 11656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Base = v.getLValueBase(); 11756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Offset = v.getLValueOffset(); 11856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 119efdb83e26f9a1fd2566afe54461216cd84814d42John McCall }; 120f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall} 12187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 12256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallstatic bool Evaluate(EvalInfo &info, const Expr *E); 123efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluateLValue(const Expr *E, LValue &Result, EvalInfo &Info); 124efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluatePointer(const Expr *E, LValue &Result, EvalInfo &Info); 12587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluateInteger(const Expr *E, APSInt &Result, EvalInfo &Info); 126d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattnerstatic bool EvaluateIntegerOrLValue(const Expr *E, APValue &Result, 127d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner EvalInfo &Info); 128d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr *E, APFloat &Result, EvalInfo &Info); 129f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallstatic bool EvaluateComplex(const Expr *E, ComplexValue &Res, EvalInfo &Info); 130f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 131f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1324efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// Misc utilities 1334efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 1344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 135e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnarastatic bool IsGlobalLValue(const Expr* E) { 13642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!E) return true; 13742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 13842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 13942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (isa<FunctionDecl>(DRE->getDecl())) 14042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 14142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) 14242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return VD->hasGlobalStorage(); 14342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 14442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } 14542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 14642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(E)) 14742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return CLE->isFileScope(); 14842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 14942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 15042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 15142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 152efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvalPointerValueAsBool(LValue& Value, bool& Result) { 153efdb83e26f9a1fd2566afe54461216cd84814d42John McCall const Expr* Base = Value.Base; 154a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1553554283157190e67918fad4221a5e6faf9317362John McCall // A null base expression indicates a null pointer. These are always 1563554283157190e67918fad4221a5e6faf9317362John McCall // evaluatable, and they are false unless the offset is zero. 1573554283157190e67918fad4221a5e6faf9317362John McCall if (!Base) { 1583554283157190e67918fad4221a5e6faf9317362John McCall Result = !Value.Offset.isZero(); 1593554283157190e67918fad4221a5e6faf9317362John McCall return true; 1603554283157190e67918fad4221a5e6faf9317362John McCall } 1613554283157190e67918fad4221a5e6faf9317362John McCall 16242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // Require the base expression to be a global l-value. 163e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (!IsGlobalLValue(Base)) return false; 16442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 1653554283157190e67918fad4221a5e6faf9317362John McCall // We have a non-null base expression. These are generally known to 1663554283157190e67918fad4221a5e6faf9317362John McCall // be true, but if it'a decl-ref to a weak symbol it can be null at 1673554283157190e67918fad4221a5e6faf9317362John McCall // runtime. 1683554283157190e67918fad4221a5e6faf9317362John McCall Result = true; 169a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1703554283157190e67918fad4221a5e6faf9317362John McCall const DeclRefExpr* DeclRef = dyn_cast<DeclRefExpr>(Base); 171a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola if (!DeclRef) 172a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola return true; 173a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1743554283157190e67918fad4221a5e6faf9317362John McCall // If it's a weak symbol, it isn't constant-evaluable. 175a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola const ValueDecl* Decl = DeclRef->getDecl(); 176a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola if (Decl->hasAttr<WeakAttr>() || 177a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola Decl->hasAttr<WeakRefAttr>() || 1780a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor Decl->isWeakImported()) 179a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola return false; 180a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1815bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return true; 1825bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman} 1835bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman 184cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCallstatic bool HandleConversionToBool(const Expr* E, bool& Result, 185cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalInfo &Info) { 1862ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (E->getType()->isIntegralOrEnumerationType()) { 1874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 1884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateInteger(E, IntResult, Info)) 1894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1904efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = IntResult != 0; 1914efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 1924efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else if (E->getType()->isRealFloatingType()) { 1934efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APFloat FloatResult(0.0); 1944efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateFloat(E, FloatResult, Info)) 1954efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1964efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = !FloatResult.isZero(); 1974efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 198a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->hasPointerRepresentation()) { 199efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue PointerResult; 2004efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluatePointer(E, PointerResult, Info)) 2014efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 2025bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return EvalPointerValueAsBool(PointerResult, Result); 203a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->isAnyComplexType()) { 204f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue ComplexResult; 205a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (!EvaluateComplex(E, ComplexResult, Info)) 206a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return false; 207a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (ComplexResult.isComplexFloat()) { 208a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = !ComplexResult.getComplexFloatReal().isZero() || 209a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman !ComplexResult.getComplexFloatImag().isZero(); 210a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else { 211a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = ComplexResult.getComplexIntReal().getBoolValue() || 212a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman ComplexResult.getComplexIntImag().getBoolValue(); 213a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } 214a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return true; 2154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2174efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 2184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 2194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleFloatToIntCast(QualType DestType, QualType SrcType, 2214ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad APFloat &Value, const ASTContext &Ctx) { 222a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 223a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Determine whether we are converting to unsigned or signed. 224575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor bool DestSigned = DestType->isSignedIntegerOrEnumerationType(); 2251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 226a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // FIXME: Warning for overflow. 227a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar uint64_t Space[4]; 228a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 229a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar (void)Value.convertToInteger(Space, DestWidth, DestSigned, 230a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar llvm::APFloat::rmTowardZero, &ignored); 231a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APSInt(llvm::APInt(DestWidth, 4, Space), !DestSigned); 232a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 233a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 2341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleFloatToFloatCast(QualType DestType, QualType SrcType, 2354ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad APFloat &Value, const ASTContext &Ctx) { 236a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 237a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result = Value; 2381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.convert(Ctx.getFloatTypeSemantics(DestType), 239a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven, &ignored); 240a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 241a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 242a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 2431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleIntToIntCast(QualType DestType, QualType SrcType, 2444ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad APSInt &Value, const ASTContext &Ctx) { 245a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 246a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt Result = Value; 247a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Figure out if this is a truncate, extend or noop cast. 248a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // If the input is signed, do a sign extend, noop, or truncate. 2499f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Result = Result.extOrTrunc(DestWidth); 250575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor Result.setIsUnsigned(DestType->isUnsignedIntegerOrEnumerationType()); 251a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 252a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 253a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 2541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleIntToFloatCast(QualType DestType, QualType SrcType, 2554ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad APSInt &Value, const ASTContext &Ctx) { 256a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 257a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result(Ctx.getFloatTypeSemantics(DestType), 1); 258a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.convertFromAPInt(Value, Value.isSigned(), 259a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven); 260a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 261a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 262a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 263c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumpnamespace { 264770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass HasSideEffect 2658cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ConstStmtVisitor<HasSideEffect, bool> { 266c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump EvalInfo &Info; 267c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumppublic: 268c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 269c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump HasSideEffect(EvalInfo &info) : Info(info) {} 270c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 271c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // Unhandled nodes conservatively default to having side effects. 2728cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitStmt(const Stmt *S) { 273c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 274c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 275c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 2768cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitParenExpr(const ParenExpr *E) { return Visit(E->getSubExpr()); } 2778cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitGenericSelectionExpr(const GenericSelectionExpr *E) { 278f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne return Visit(E->getResultExpr()); 279f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne } 2808cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitDeclRefExpr(const DeclRefExpr *E) { 281df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (Info.Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 282c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 283c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return false; 284c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 285f85e193739c953358c865005855253af4f68a497John McCall bool VisitObjCIvarRefExpr(const ObjCIvarRefExpr *E) { 286f85e193739c953358c865005855253af4f68a497John McCall if (Info.Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 287f85e193739c953358c865005855253af4f68a497John McCall return true; 288f85e193739c953358c865005855253af4f68a497John McCall return false; 289f85e193739c953358c865005855253af4f68a497John McCall } 290f85e193739c953358c865005855253af4f68a497John McCall bool VisitBlockDeclRefExpr (const BlockDeclRefExpr *E) { 291f85e193739c953358c865005855253af4f68a497John McCall if (Info.Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 292f85e193739c953358c865005855253af4f68a497John McCall return true; 293f85e193739c953358c865005855253af4f68a497John McCall return false; 294f85e193739c953358c865005855253af4f68a497John McCall } 295f85e193739c953358c865005855253af4f68a497John McCall 296c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // We don't want to evaluate BlockExprs multiple times, as they generate 297c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // a ton of code. 2988cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBlockExpr(const BlockExpr *E) { return true; } 2998cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitPredefinedExpr(const PredefinedExpr *E) { return false; } 3008cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) 301c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump { return Visit(E->getInitializer()); } 3028cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitMemberExpr(const MemberExpr *E) { return Visit(E->getBase()); } 3038cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitIntegerLiteral(const IntegerLiteral *E) { return false; } 3048cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitFloatingLiteral(const FloatingLiteral *E) { return false; } 3058cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitStringLiteral(const StringLiteral *E) { return false; } 3068cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCharacterLiteral(const CharacterLiteral *E) { return false; } 3078cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *E) 308f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne { return false; } 3098cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitArraySubscriptExpr(const ArraySubscriptExpr *E) 310980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 3118cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitChooseExpr(const ChooseExpr *E) 312c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump { return Visit(E->getChosenSubExpr(Info.Ctx)); } 3138cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E) { return Visit(E->getSubExpr()); } 3148cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBinAssign(const BinaryOperator *E) { return true; } 3158cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCompoundAssignOperator(const BinaryOperator *E) { return true; } 3168cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBinaryOperator(const BinaryOperator *E) 317980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 3188cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPreInc(const UnaryOperator *E) { return true; } 3198cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPostInc(const UnaryOperator *E) { return true; } 3208cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPreDec(const UnaryOperator *E) { return true; } 3218cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPostDec(const UnaryOperator *E) { return true; } 3228cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryDeref(const UnaryOperator *E) { 323df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (Info.Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 324c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 325980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump return Visit(E->getSubExpr()); 326c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 3278cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryOperator(const UnaryOperator *E) { return Visit(E->getSubExpr()); } 328363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner 329363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner // Has side effects if any element does. 3308cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitInitListExpr(const InitListExpr *E) { 331363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner for (unsigned i = 0, e = E->getNumInits(); i != e; ++i) 332363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner if (Visit(E->getInit(i))) return true; 3338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (const Expr *filler = E->getArrayFiller()) 3344423ac0282acb8ba801eb05b38712438dc0c1e3eArgyrios Kyrtzidis return Visit(filler); 335363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner return false; 336363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner } 337ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor 3388cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitSizeOfPackExpr(const SizeOfPackExpr *) { return false; } 339c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump}; 340c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 34156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallclass OpaqueValueEvaluation { 34256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall EvalInfo &info; 34356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall OpaqueValueExpr *opaqueValue; 34456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 34556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallpublic: 34656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall OpaqueValueEvaluation(EvalInfo &info, OpaqueValueExpr *opaqueValue, 34756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Expr *value) 34856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall : info(info), opaqueValue(opaqueValue) { 34956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 35056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall // If evaluation fails, fail immediately. 35156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (!Evaluate(info, value)) { 35256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall this->opaqueValue = 0; 35356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall return; 35456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 35556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall info.OpaqueValues[opaqueValue] = info.EvalResult.Val; 35656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 35756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 35856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall bool hasError() const { return opaqueValue == 0; } 35956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 36056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall ~OpaqueValueEvaluation() { 36156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (opaqueValue) info.OpaqueValues.erase(opaqueValue); 36256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 36356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall}; 36456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 365c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump} // end anonymous namespace 366c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 3674efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 3688cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne// Generic Evaluation 3698cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne//===----------------------------------------------------------------------===// 3708cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournenamespace { 3718cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 3728cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournetemplate <class Derived, typename RetTy=void> 3738cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourneclass ExprEvaluatorBase 3748cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ConstStmtVisitor<Derived, RetTy> { 3758cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourneprivate: 3768cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy DerivedSuccess(const APValue &V, const Expr *E) { 3778cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return static_cast<Derived*>(this)->Success(V, E); 3788cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 3798cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy DerivedError(const Expr *E) { 3808cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return static_cast<Derived*>(this)->Error(E); 3818cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 3828cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 3838cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourneprotected: 3848cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne EvalInfo &Info; 3858cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne typedef ConstStmtVisitor<Derived, RetTy> StmtVisitorTy; 3868cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne typedef ExprEvaluatorBase ExprEvaluatorBaseTy; 3878cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 3888cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournepublic: 3898cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne ExprEvaluatorBase(EvalInfo &Info) : Info(Info) {} 3908cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 3918cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitStmt(const Stmt *) { 3928cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne assert(0 && "Expression evaluator should not be called on stmts"); 3938cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return DerivedError(0); 3948cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 3958cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitExpr(const Expr *E) { 3968cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return DerivedError(E); 3978cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 3988cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 3998cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitParenExpr(const ParenExpr *E) 4008cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getSubExpr()); } 4018cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitUnaryExtension(const UnaryOperator *E) 4028cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getSubExpr()); } 4038cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitUnaryPlus(const UnaryOperator *E) 4048cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getSubExpr()); } 4058cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitChooseExpr(const ChooseExpr *E) 4068cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getChosenSubExpr(Info.Ctx)); } 4078cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitGenericSelectionExpr(const GenericSelectionExpr *E) 4088cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getResultExpr()); } 4098cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4108cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitBinaryConditionalOperator(const BinaryConditionalOperator *E) { 4118cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne OpaqueValueEvaluation opaque(Info, E->getOpaqueValue(), E->getCommon()); 4128cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (opaque.hasError()) 4138cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return DerivedError(E); 4148cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4158cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool cond; 4168cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (!HandleConversionToBool(E->getCond(), cond, Info)) 4178cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return DerivedError(E); 4188cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4198cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return StmtVisitorTy::Visit(cond ? E->getTrueExpr() : E->getFalseExpr()); 4208cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 4218cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4228cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitConditionalOperator(const ConditionalOperator *E) { 4238cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool BoolResult; 4248cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 4258cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return DerivedError(E); 4268cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4278cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 4288cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return StmtVisitorTy::Visit(EvalExpr); 4298cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 4308cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4318cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitOpaqueValueExpr(const OpaqueValueExpr *E) { 4328cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const APValue *value = Info.getOpaqueValue(E); 4338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (!value) 4348cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return (E->getSourceExpr() ? StmtVisitorTy::Visit(E->getSourceExpr()) 4358cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : DerivedError(E)); 4368cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return DerivedSuccess(*value, E); 4378cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 4388cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne}; 4398cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4408cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne} 4418cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4428cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne//===----------------------------------------------------------------------===// 4434efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// LValue Evaluation 4444efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 4454efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmannamespace { 446770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass LValueExprEvaluator 4478cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<LValueExprEvaluator, bool> { 448efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue &Result; 449efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 4508cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const Expr *E) { 451efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = E; 452efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::Zero(); 453efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 454efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 4554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanpublic: 4561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 457efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValueExprEvaluator(EvalInfo &info, LValue &Result) : 4588cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne ExprEvaluatorBaseTy(info), Result(Result) {} 4594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4608cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const APValue &V, const Expr *E) { 4618cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result.setFrom(V); 4628cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 4638cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 4648cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Error(const Expr *E) { 465efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 4664efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 4678ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 4688cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitDeclRefExpr(const DeclRefExpr *E); 4698cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitPredefinedExpr(const PredefinedExpr *E) { return Success(E); } 4708cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 4718cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitMemberExpr(const MemberExpr *E); 4728cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitStringLiteral(const StringLiteral *E) { return Success(E); } 4738cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitObjCEncodeExpr(const ObjCEncodeExpr *E) { return Success(E); } 4748cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitArraySubscriptExpr(const ArraySubscriptExpr *E); 4758cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryDeref(const UnaryOperator *E); 4768cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4778cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E) { 47826bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson switch (E->getCastKind()) { 47926bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson default: 480efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 48126bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson 4822de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_NoOp: 48326bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson return Visit(E->getSubExpr()); 48426bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 48526bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 486ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: __real__, __imag__ 4878cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman}; 4894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} // end anonymous namespace 4904efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 491efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluateLValue(const Expr* E, LValue& Result, EvalInfo &Info) { 4928cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return LValueExprEvaluator(Info, Result).Visit(E); 4934efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 4944efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4958cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitDeclRefExpr(const DeclRefExpr *E) { 49650c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (isa<FunctionDecl>(E->getDecl())) { 497efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 4988cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } else if (const VarDecl* VD = dyn_cast<VarDecl>(E->getDecl())) { 49950c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (!VD->getType()->isReferenceType()) 500efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 501761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth // Reference parameters can refer to anything even if they have an 502761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth // "initializer" in the form of a default argument. 5038cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (!isa<ParmVarDecl>(VD)) 5048cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne // FIXME: Check whether VD might be overridden! 5058cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (const Expr *Init = VD->getAnyInitializer()) 5068cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Visit(Init); 50750c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } 50850c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman 5098cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitDeclRefExpr(E); 51035873c49adad211ff466e34342a52665742794f5Anders Carlsson} 51135873c49adad211ff466e34342a52665742794f5Anders Carlsson 5128cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool 5138cad3046be06ea73ff8892d947697a21d7a440d3Peter CollingbourneLValueExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 514efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 5154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 5164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5178cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitMemberExpr(const MemberExpr *E) { 5184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman QualType Ty; 5194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->isArrow()) { 520efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(E->getBase(), Result, Info)) 521efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 5226217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek Ty = E->getBase()->getType()->getAs<PointerType>()->getPointeeType(); 5234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else { 524efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!Visit(E->getBase())) 525efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 5264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Ty = E->getBase()->getType(); 5274efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 5284efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5298cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const RecordDecl *RD = Ty->getAs<RecordType>()->getDecl(); 5304efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 53186f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 5328cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const FieldDecl *FD = dyn_cast<FieldDecl>(E->getMemberDecl()); 53386f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (!FD) // FIXME: deal with other kinds of member expressions 534efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 5352be586108bb401019647791feca19ea03fd477ceEli Friedman 5362be586108bb401019647791feca19ea03fd477ceEli Friedman if (FD->getType()->isReferenceType()) 537efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 5382be586108bb401019647791feca19ea03fd477ceEli Friedman 5394efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // FIXME: This is linear time. 54044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor unsigned i = 0; 54117945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = RD->field_begin(), 54217945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = RD->field_end(); 54344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; (void)++Field, ++i) { 54444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (*Field == FD) 5454efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman break; 5464efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 5474efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 548fb1e3bc29b667f4275e1d5a43d64ec173f4f9a7dKen Dyck Result.Offset += Info.Ctx.toCharUnitsFromBits(RL.getFieldOffset(i)); 549efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 5504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 5514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5528cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitArraySubscriptExpr(const ArraySubscriptExpr *E) { 5533068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getBase(), Result, Info)) 554efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 5551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5563068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APSInt Index; 5573068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluateInteger(E->getIdx(), Index, Info)) 558efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 5593068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 560199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck CharUnits ElementSize = Info.Ctx.getTypeSizeInChars(E->getType()); 561efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset += Index.getSExtValue() * ElementSize; 562efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 5633068d117951a8df54bae9db039b56201ab10962bAnders Carlsson} 5644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5658cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitUnaryDeref(const UnaryOperator *E) { 566efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluatePointer(E->getSubExpr(), Result, Info); 567e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman} 568e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman 5694efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 570f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Pointer Evaluation 571f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 572f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 573c754aa62643e66ab967ca32ae8b0b3fc419bba25Anders Carlssonnamespace { 574770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass PointerExprEvaluator 5758cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<PointerExprEvaluator, bool> { 576efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue &Result; 577efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 5788cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const Expr *E) { 579efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = E; 580efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::Zero(); 581efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 582efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 5832bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonpublic: 5841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 585efdb83e26f9a1fd2566afe54461216cd84814d42John McCall PointerExprEvaluator(EvalInfo &info, LValue &Result) 5868cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(Result) {} 587f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 5888cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const APValue &V, const Expr *E) { 5898cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result.setFrom(V); 5908cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 5912bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 5928cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Error(const Stmt *S) { 5938cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return false; 594f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne } 5952bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 596efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitBinaryOperator(const BinaryOperator *E); 5978cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr* E); 598efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitUnaryAddrOf(const UnaryOperator *E); 5998cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitObjCStringLiteral(const ObjCStringLiteral *E) 600efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success(E); } 6018cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitAddrLabelExpr(const AddrLabelExpr *E) 602efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success(E); } 6038cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCallExpr(const CallExpr *E); 6048cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBlockExpr(const BlockExpr *E) { 605469a1eb996e1cb0be54f9b210f836afbddcbb2ccJohn McCall if (!E->getBlockDecl()->hasCaptures()) 606efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 607efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 608b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump } 6098cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) 610efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success((Expr*)0); } 6118cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *E) 612efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success((Expr*)0); } 61356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 614ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: @protocol, @selector 6152bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson}; 616f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 6172bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 618efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluatePointer(const Expr* E, LValue& Result, EvalInfo &Info) { 6197db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall assert(E->getType()->hasPointerRepresentation()); 6208cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return PointerExprEvaluator(Info, Result).Visit(E); 621f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 622650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 623efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 6242de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() != BO_Add && 6252de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall E->getOpcode() != BO_Sub) 626efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 628650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *PExp = E->getLHS(); 629650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *IExp = E->getRHS(); 630650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (IExp->getType()->isPointerType()) 631f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner std::swap(PExp, IExp); 6321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 633efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(PExp, Result, Info)) 634efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 636efdb83e26f9a1fd2566afe54461216cd84814d42John McCall llvm::APSInt Offset; 637efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateInteger(IExp, Offset, Info)) 638efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 639efdb83e26f9a1fd2566afe54461216cd84814d42John McCall int64_t AdditionalOffset 640efdb83e26f9a1fd2566afe54461216cd84814d42John McCall = Offset.isSigned() ? Offset.getSExtValue() 641efdb83e26f9a1fd2566afe54461216cd84814d42John McCall : static_cast<int64_t>(Offset.getZExtValue()); 642650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 643e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar // Compute the new offset in the appropriate width. 644e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar 645e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar QualType PointeeType = 646e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar PExp->getType()->getAs<PointerType>()->getPointeeType(); 647efdb83e26f9a1fd2566afe54461216cd84814d42John McCall CharUnits SizeOfPointee; 6481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6494d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson // Explicitly handle GNU void* and function pointer arithmetic extensions. 6504d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson if (PointeeType->isVoidType() || PointeeType->isFunctionType()) 651efdb83e26f9a1fd2566afe54461216cd84814d42John McCall SizeOfPointee = CharUnits::One(); 6524d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson else 653efdb83e26f9a1fd2566afe54461216cd84814d42John McCall SizeOfPointee = Info.Ctx.getTypeSizeInChars(PointeeType); 6544efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 6552de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add) 656efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset += AdditionalOffset * SizeOfPointee; 657650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson else 658efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset -= AdditionalOffset * SizeOfPointee; 6594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 660efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 661650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 6624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 663efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitUnaryAddrOf(const UnaryOperator *E) { 664efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluateLValue(E->getSubExpr(), Result, Info); 6654efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 6661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 667650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 6688cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool PointerExprEvaluator::VisitCastExpr(const CastExpr* E) { 6698cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr* SubExpr = E->getSubExpr(); 670650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 67109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman switch (E->getCastKind()) { 67209a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman default: 67309a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 67409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 6752de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_NoOp: 6762de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_BitCast: 6772de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_AnyPointerToObjCPointerCast: 6782de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_AnyPointerToBlockPointerCast: 67909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman return Visit(SubExpr); 68009a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 6815c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson case CK_DerivedToBase: 6825c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson case CK_UncheckedDerivedToBase: { 6835c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson LValue BaseLV; 6845c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson if (!EvaluatePointer(E->getSubExpr(), BaseLV, Info)) 6855c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return false; 6865c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 6875c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // Now figure out the necessary offset to add to the baseLV to get from 6885c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // the derived class to the base class. 6897c7f820d70c925b29290a8563b59615816a827fcKen Dyck CharUnits Offset = CharUnits::Zero(); 6905c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 6915c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson QualType Ty = E->getSubExpr()->getType(); 6925c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXRecordDecl *DerivedDecl = 6935c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson Ty->getAs<PointerType>()->getPointeeType()->getAsCXXRecordDecl(); 6945c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 6955c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson for (CastExpr::path_const_iterator PathI = E->path_begin(), 6965c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson PathE = E->path_end(); PathI != PathE; ++PathI) { 6975c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXBaseSpecifier *Base = *PathI; 6985c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 6995c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // FIXME: If the base is virtual, we'd need to determine the type of the 7005c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // most derived class and we don't support that right now. 7015c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson if (Base->isVirtual()) 7025c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return false; 7035c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 7045c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXRecordDecl *BaseDecl = Base->getType()->getAsCXXRecordDecl(); 7055c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const ASTRecordLayout &Layout = Info.Ctx.getASTRecordLayout(DerivedDecl); 7065c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 7077c7f820d70c925b29290a8563b59615816a827fcKen Dyck Offset += Layout.getBaseClassOffset(BaseDecl); 7085c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson DerivedDecl = BaseDecl; 7095c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson } 7105c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 7115c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson Result.Base = BaseLV.getLValueBase(); 7127c7f820d70c925b29290a8563b59615816a827fcKen Dyck Result.Offset = BaseLV.getLValueOffset() + Offset; 7135c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return true; 7145c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson } 7155c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 716404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall case CK_NullToPointer: { 717404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall Result.Base = 0; 718404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall Result.Offset = CharUnits::Zero(); 719404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall return true; 720404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall } 721404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall 7222de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_IntegralToPointer: { 723efdb83e26f9a1fd2566afe54461216cd84814d42John McCall APValue Value; 724efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateIntegerOrLValue(SubExpr, Value, Info)) 72509a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 72669ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 727efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (Value.isInt()) { 7289f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Value.getInt() = Value.getInt().extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 729efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = 0; 730efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::fromQuantity(Value.getInt().getZExtValue()); 731efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 732efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else { 733efdb83e26f9a1fd2566afe54461216cd84814d42John McCall // Cast is of an lvalue, no need to change value. 734efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = Value.getLValueBase(); 735efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = Value.getLValueOffset(); 736efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 737650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 738650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 7392de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_ArrayToPointerDecay: 7402de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_FunctionToPointerDecay: 741efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluateLValue(SubExpr, Result, Info); 7424efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 7434efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 744efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 7451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 746650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 7478cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool PointerExprEvaluator::VisitCallExpr(const CallExpr *E) { 7481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (E->isBuiltinCall(Info.Ctx) == 7490d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Builtin::BI__builtin___CFStringMakeConstantString || 7500d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall E->isBuiltinCall(Info.Ctx) == 7510d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Builtin::BI__builtin___NSStringMakeConstantString) 752efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 75356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 7548cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitCallExpr(E); 7554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 756f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 757f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 75859b5da6d853b4368b984700315adf7b37de05764Nate Begeman// Vector Evaluation 75959b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 76059b5da6d853b4368b984700315adf7b37de05764Nate Begeman 76159b5da6d853b4368b984700315adf7b37de05764Nate Begemannamespace { 762770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramer class VectorExprEvaluator 7638cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<VectorExprEvaluator, APValue> { 76491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue GetZeroVector(QualType VecType); 76559b5da6d853b4368b984700315adf7b37de05764Nate Begeman public: 7661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7678cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne VectorExprEvaluator(EvalInfo &info) : ExprEvaluatorBaseTy(info) {} 7681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7698cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne APValue Success(const APValue &V, const Expr *E) { return V; } 7708cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne APValue Error(const Expr *E) { return APValue(); } 7711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 77291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryReal(const UnaryOperator *E) 77391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 77491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) 77591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return GetZeroVector(E->getType()); } 77659b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCastExpr(const CastExpr* E); 77759b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 77859b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitInitListExpr(const InitListExpr *E); 77991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryImag(const UnaryOperator *E); 78091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // FIXME: Missing: unary -, unary ~, binary add/sub/mul/div, 7812217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // binary comparisons, binary and/or/xor, 78291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // shufflevector, ExtVectorElementExpr 78391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // (Note that these require implementing conversions 78491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // between vector types.) 78559b5da6d853b4368b984700315adf7b37de05764Nate Begeman }; 78659b5da6d853b4368b984700315adf7b37de05764Nate Begeman} // end anonymous namespace 78759b5da6d853b4368b984700315adf7b37de05764Nate Begeman 78859b5da6d853b4368b984700315adf7b37de05764Nate Begemanstatic bool EvaluateVector(const Expr* E, APValue& Result, EvalInfo &Info) { 78959b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!E->getType()->isVectorType()) 79059b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 7918cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result = VectorExprEvaluator(Info).Visit(E); 79259b5da6d853b4368b984700315adf7b37de05764Nate Begeman return !Result.isUninit(); 79359b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 79459b5da6d853b4368b984700315adf7b37de05764Nate Begeman 79559b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue VectorExprEvaluator::VisitCastExpr(const CastExpr* E) { 796183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VTy = E->getType()->getAs<VectorType>(); 797c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman QualType EltTy = VTy->getElementType(); 798c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned NElts = VTy->getNumElements(); 799c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned EltWidth = Info.Ctx.getTypeSize(EltTy); 8001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 80159b5da6d853b4368b984700315adf7b37de05764Nate Begeman const Expr* SE = E->getSubExpr(); 802e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman QualType SETy = SE->getType(); 80359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 80446a523285928aa07bf14803178dc04616ac85994Eli Friedman switch (E->getCastKind()) { 80546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_VectorSplat: { 80646a523285928aa07bf14803178dc04616ac85994Eli Friedman APValue Result = APValue(); 80746a523285928aa07bf14803178dc04616ac85994Eli Friedman if (SETy->isIntegerType()) { 80846a523285928aa07bf14803178dc04616ac85994Eli Friedman APSInt IntResult; 80946a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!EvaluateInteger(SE, IntResult, Info)) 81046a523285928aa07bf14803178dc04616ac85994Eli Friedman return APValue(); 81146a523285928aa07bf14803178dc04616ac85994Eli Friedman Result = APValue(IntResult); 81246a523285928aa07bf14803178dc04616ac85994Eli Friedman } else if (SETy->isRealFloatingType()) { 81346a523285928aa07bf14803178dc04616ac85994Eli Friedman APFloat F(0.0); 81446a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!EvaluateFloat(SE, F, Info)) 81546a523285928aa07bf14803178dc04616ac85994Eli Friedman return APValue(); 81646a523285928aa07bf14803178dc04616ac85994Eli Friedman Result = APValue(F); 81746a523285928aa07bf14803178dc04616ac85994Eli Friedman } else { 8180254e70b189a2400648d1cc53e279cc3786186e8Anders Carlsson return APValue(); 81946a523285928aa07bf14803178dc04616ac85994Eli Friedman } 820c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 821c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // Splat and create vector APValue. 822c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts(NElts, Result); 823c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 824e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } 82546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_BitCast: { 82646a523285928aa07bf14803178dc04616ac85994Eli Friedman if (SETy->isVectorType()) 8278cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Visit(SE); 828c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 82946a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!SETy->isIntegerType()) 8300254e70b189a2400648d1cc53e279cc3786186e8Anders Carlsson return APValue(); 8311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83246a523285928aa07bf14803178dc04616ac85994Eli Friedman APSInt Init; 83346a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!EvaluateInteger(SE, Init, Info)) 834c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 835c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 83646a523285928aa07bf14803178dc04616ac85994Eli Friedman assert((EltTy->isIntegerType() || EltTy->isRealFloatingType()) && 83746a523285928aa07bf14803178dc04616ac85994Eli Friedman "Vectors must be composed of ints or floats"); 83846a523285928aa07bf14803178dc04616ac85994Eli Friedman 83946a523285928aa07bf14803178dc04616ac85994Eli Friedman llvm::SmallVector<APValue, 4> Elts; 84046a523285928aa07bf14803178dc04616ac85994Eli Friedman for (unsigned i = 0; i != NElts; ++i) { 84146a523285928aa07bf14803178dc04616ac85994Eli Friedman APSInt Tmp = Init.extOrTrunc(EltWidth); 84246a523285928aa07bf14803178dc04616ac85994Eli Friedman 84346a523285928aa07bf14803178dc04616ac85994Eli Friedman if (EltTy->isIntegerType()) 84446a523285928aa07bf14803178dc04616ac85994Eli Friedman Elts.push_back(APValue(Tmp)); 84546a523285928aa07bf14803178dc04616ac85994Eli Friedman else 84646a523285928aa07bf14803178dc04616ac85994Eli Friedman Elts.push_back(APValue(APFloat(Tmp))); 84746a523285928aa07bf14803178dc04616ac85994Eli Friedman 84846a523285928aa07bf14803178dc04616ac85994Eli Friedman Init >>= EltWidth; 84946a523285928aa07bf14803178dc04616ac85994Eli Friedman } 85046a523285928aa07bf14803178dc04616ac85994Eli Friedman return APValue(&Elts[0], Elts.size()); 85146a523285928aa07bf14803178dc04616ac85994Eli Friedman } 85246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_LValueToRValue: 85346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_NoOp: 8548cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Visit(SE); 85546a523285928aa07bf14803178dc04616ac85994Eli Friedman default: 8560254e70b189a2400648d1cc53e279cc3786186e8Anders Carlsson return APValue(); 857c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman } 85859b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 85959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 8601eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 86159b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 8628cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return this->Visit(E->getInitializer()); 86359b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 86459b5da6d853b4368b984700315adf7b37de05764Nate Begeman 8651eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 86659b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 867183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = E->getType()->getAs<VectorType>(); 86859b5da6d853b4368b984700315adf7b37de05764Nate Begeman unsigned NumInits = E->getNumInits(); 86991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman unsigned NumElements = VT->getNumElements(); 8701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 87159b5da6d853b4368b984700315adf7b37de05764Nate Begeman QualType EltTy = VT->getElementType(); 87259b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::SmallVector<APValue, 4> Elements; 87359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 874a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // If a vector is initialized with a single element, that value 875a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // becomes every element of the vector, not just the first. 876a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // This is the behavior described in the IBM AltiVec documentation. 877a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (NumInits == 1) { 878b92ae0e31126e5630d7022f2d6abe7eed2e17746Tanya Lattner 879b92ae0e31126e5630d7022f2d6abe7eed2e17746Tanya Lattner // Handle the case where the vector is initialized by a another 880b92ae0e31126e5630d7022f2d6abe7eed2e17746Tanya Lattner // vector (OpenCL 6.1.6). 881b92ae0e31126e5630d7022f2d6abe7eed2e17746Tanya Lattner if (E->getInit(0)->getType()->isVectorType()) 882b92ae0e31126e5630d7022f2d6abe7eed2e17746Tanya Lattner return this->Visit(const_cast<Expr*>(E->getInit(0))); 883b92ae0e31126e5630d7022f2d6abe7eed2e17746Tanya Lattner 884a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall APValue InitValue; 88559b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (EltTy->isIntegerType()) { 88659b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APSInt sInt(32); 887a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(0), sInt, Info)) 888a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 889a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(sInt); 89059b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else { 89159b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APFloat f(0.0); 892a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(0), f, Info)) 893a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 894a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(f); 895a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 896a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 897a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(InitValue); 898a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 899a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 900a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 901a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (EltTy->isIntegerType()) { 902a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APSInt sInt(32); 903a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 904a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(i), sInt, Info)) 905a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 906a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 907a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall sInt = Info.Ctx.MakeIntValue(0, EltTy); 908a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 909a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(sInt)); 91091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 911a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APFloat f(0.0); 912a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 913a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(i), f, Info)) 914a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 915a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 916a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall f = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy)); 917a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 918a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(f)); 91991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 92059b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 92159b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 92259b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(&Elements[0], Elements.size()); 92359b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 92459b5da6d853b4368b984700315adf7b37de05764Nate Begeman 9251eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 92691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanVectorExprEvaluator::GetZeroVector(QualType T) { 927183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = T->getAs<VectorType>(); 92891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman QualType EltTy = VT->getElementType(); 92991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue ZeroElement; 93091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EltTy->isIntegerType()) 93191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = APValue(Info.Ctx.MakeIntValue(0, EltTy)); 93291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman else 93391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = 93491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue(APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy))); 93591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 93691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman llvm::SmallVector<APValue, 4> Elements(VT->getNumElements(), ZeroElement); 93791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(&Elements[0], Elements.size()); 93891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 93991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 94091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 94191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 94291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Info.EvalResult.HasSideEffects = true; 94391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return GetZeroVector(E->getType()); 94491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 94591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 94659b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 947f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Integer Evaluation 948f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 949f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 950f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnernamespace { 951770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass IntExprEvaluator 9528cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<IntExprEvaluator, bool> { 95330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue &Result; 954f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerpublic: 95530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar IntExprEvaluator(EvalInfo &info, APValue &result) 9568cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(result) {} 957f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 9583f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar bool Success(const llvm::APSInt &SI, const Expr *E) { 9592ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 9602ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 961575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor assert(SI.isSigned() == E->getType()->isSignedIntegerOrEnumerationType() && 9623f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 96330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 9643f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 96530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(SI); 9663f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 9673f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 9683f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 969131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(const llvm::APInt &I, const Expr *E) { 9702ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 9712ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 97230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(I.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 9733f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 97430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(APSInt(I)); 975575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor Result.getInt().setIsUnsigned( 976575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor E->getType()->isUnsignedIntegerOrEnumerationType()); 977131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 978131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 979131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 980131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(uint64_t Value, const Expr *E) { 9812ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 9822ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 98330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(Info.Ctx.MakeIntValue(Value, E->getType())); 984131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 985131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 986131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 9874f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck bool Success(CharUnits Size, const Expr *E) { 9884f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(Size.getQuantity(), E); 9894f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck } 9904f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck 9914f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck 99282206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Error(SourceLocation L, diag::kind D, const Expr *E) { 99332fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // Take the first error. 99454da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson if (Info.EvalResult.Diag == 0) { 99554da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.DiagLoc = L; 99654da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.Diag = D; 99782206e267ce6cc709797127616f64672d255b310Anders Carlsson Info.EvalResult.DiagExpr = E; 99832fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 99954176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return false; 10007a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner } 10011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10028cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const APValue &V, const Expr *E) { 10038cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Success(V.getInt(), E); 100432fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 10058cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Error(const Expr *E) { 10060e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1007f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner } 10081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10098cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 10108cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne // Visitor Methods 10118cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 1012f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 10134c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitIntegerLiteral(const IntegerLiteral *E) { 1014131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 10154c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 10164c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCharacterLiteral(const CharacterLiteral *E) { 1017131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 10184c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 1019043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 1020043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool CheckReferencedDecl(const Expr *E, const Decl *D); 1021043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitDeclRefExpr(const DeclRefExpr *E) { 10228cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (CheckReferencedDecl(E, E->getDecl())) 10238cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 10248cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 10258cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitDeclRefExpr(E); 1026043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 1027043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitMemberExpr(const MemberExpr *E) { 1028043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (CheckReferencedDecl(E, E->getMemberDecl())) { 1029043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman // Conservatively assume a MemberExpr will have side-effects 1030043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman Info.EvalResult.HasSideEffects = true; 1031043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return true; 1032043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 10338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 10348cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitMemberExpr(E); 1035043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 1036043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 10378cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCallExpr(const CallExpr *E); 1038b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitBinaryOperator(const BinaryOperator *E); 10398ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor bool VisitOffsetOfExpr(const OffsetOfExpr *E); 1040b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitUnaryOperator(const UnaryOperator *E); 1041f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 10428cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr* E); 1043f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne bool VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *E); 10440518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 10453068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 1046131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 10473068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 10481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10493f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson bool VisitGNUNullExpr(const GNUNullExpr *E) { 1050131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 10513f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson } 10521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1053ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor bool VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E) { 1054131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 10553068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 10563068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 1057664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { 1058664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 1059664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman } 1060664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 106164b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) { 10620dfd848fa4c9664852ba8c929a8bd3fce93ddca2Sebastian Redl return Success(E->getValue(), E); 106364b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl } 106464b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl 10656ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet bool VisitBinaryTypeTraitExpr(const BinaryTypeTraitExpr *E) { 10666ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet return Success(E->getValue(), E); 10676ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet } 10686ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet 106921ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley bool VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *E) { 107021ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley return Success(E->getValue(), E); 107121ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley } 107221ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley 1073552622067dc45013d240f73952fece703f5e63bdJohn Wiegley bool VisitExpressionTraitExpr(const ExpressionTraitExpr *E) { 1074552622067dc45013d240f73952fece703f5e63bdJohn Wiegley return Success(E->getValue(), E); 1075552622067dc45013d240f73952fece703f5e63bdJohn Wiegley } 1076552622067dc45013d240f73952fece703f5e63bdJohn Wiegley 1077722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman bool VisitUnaryReal(const UnaryOperator *E); 1078664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitUnaryImag(const UnaryOperator *E); 1079664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 1080295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl bool VisitCXXNoexceptExpr(const CXXNoexceptExpr *E); 1081ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor bool VisitSizeOfPackExpr(const SizeOfPackExpr *E); 1082ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor 1083fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattnerprivate: 10848b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfExpr(const Expr *E); 10858b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfType(QualType T); 108642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall static QualType GetObjectType(const Expr *E); 10878cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool TryEvaluateBuiltinObjectSize(const CallExpr *E); 1088664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman // FIXME: Missing: array subscript of vector, member of vector 1089f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner}; 1090f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 1091f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 109269ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateIntegerOrLValue(const Expr* E, APValue &Result, EvalInfo &Info) { 10932ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType()); 10948cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return IntExprEvaluator(Info, Result).Visit(E); 109569ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar} 109669ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 109769ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateInteger(const Expr* E, APSInt &Result, EvalInfo &Info) { 10982ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType()); 10997db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall 110030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue Val; 110169ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (!EvaluateIntegerOrLValue(E, Val, Info) || !Val.isInt()) 110230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 110330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = Val.getInt(); 110430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return true; 1105f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 1106f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 1107043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedmanbool IntExprEvaluator::CheckReferencedDecl(const Expr* E, const Decl* D) { 11084c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Enums are integer constant exprs. 110929a7f3342c3c6dd15d914c61ae22246c36d51ce7Eli Friedman if (const EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(D)) 111029a7f3342c3c6dd15d914c61ae22246c36d51ce7Eli Friedman return Success(ECD->getInitVal(), E); 1111b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 1112b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl // In C++, const, non-volatile integers initialized with ICEs are ICEs. 1113e1646da3bb0fe97b372e5fe8cefc537b22048fc4Eli Friedman // In C, they can also be folded, although they are not ICEs. 1114cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor if (Info.Ctx.getCanonicalType(E->getType()).getCVRQualifiers() 1115cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor == Qualifiers::Const) { 1116f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson 1117f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson if (isa<ParmVarDecl>(D)) 11188cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return false; 1119f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson 1120043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 112131310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl if (const Expr *Init = VD->getAnyInitializer()) { 1122c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (APValue *V = VD->getEvaluatedValue()) { 1123c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (V->isInt()) 1124c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Success(V->getInt(), E); 11258cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return false; 1126c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman } 1127c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 1128c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (VD->isEvaluatingValue()) 11298cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return false; 1130c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 1131c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatingValue(); 1132c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 1133a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman Expr::EvalResult EResult; 1134a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman if (Init->Evaluate(EResult, Info.Ctx) && !EResult.HasSideEffects && 1135a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman EResult.Val.isInt()) { 113678d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor // Cache the evaluated value in the variable declaration. 1137a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman Result = EResult.Val; 1138c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatedValue(Result); 113978d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return true; 114078d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 114178d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor 1142c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatedValue(APValue()); 114378d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 1144b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 1145b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 1146b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 11474c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Otherwise, random variable references are not constants. 11488cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return false; 11494c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 11504c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner 1151a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way 1152a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// as GCC. 1153a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattnerstatic int EvaluateBuiltinClassifyType(const CallExpr *E) { 1154a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // The following enum mimics the values returned by GCC. 11557c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl // FIXME: Does GCC differ between lvalue and rvalue references here? 1156a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enum gcc_type_class { 1157a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner no_type_class = -1, 1158a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner void_type_class, integer_type_class, char_type_class, 1159a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enumeral_type_class, boolean_type_class, 1160a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner pointer_type_class, reference_type_class, offset_type_class, 1161a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner real_type_class, complex_type_class, 1162a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner function_type_class, method_type_class, 1163a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner record_type_class, union_type_class, 1164a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner array_type_class, string_type_class, 1165a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner lang_type_class 1166a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner }; 11671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If no argument was supplied, default to "no_type_class". This isn't 1169a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // ideal, however it is what gcc does. 1170a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (E->getNumArgs() == 0) 1171a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return no_type_class; 11721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1173a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner QualType ArgTy = E->getArg(0)->getType(); 1174a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (ArgTy->isVoidType()) 1175a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return void_type_class; 1176a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isEnumeralType()) 1177a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return enumeral_type_class; 1178a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isBooleanType()) 1179a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return boolean_type_class; 1180a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isCharType()) 1181a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return string_type_class; // gcc doesn't appear to use char_type_class 1182a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isIntegerType()) 1183a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return integer_type_class; 1184a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isPointerType()) 1185a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return pointer_type_class; 1186a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isReferenceType()) 1187a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return reference_type_class; 1188a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isRealType()) 1189a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return real_type_class; 1190a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isComplexType()) 1191a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return complex_type_class; 1192a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isFunctionType()) 1193a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return function_type_class; 1194fb87b89fc9eb103e19fb8e4b925c23f0bd091b99Douglas Gregor else if (ArgTy->isStructureOrClassType()) 1195a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return record_type_class; 1196a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 1197a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 1198a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isArrayType()) 1199a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return array_type_class; 1200a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 1201a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 1202a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else // FIXME: offset_type_class, method_type_class, & lang_type_class? 1203a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner assert(0 && "CallExpr::isBuiltinClassifyType(): unimplemented type"); 1204a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return -1; 1205a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner} 1206a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 120742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// Retrieves the "underlying object type" of the given expression, 120842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// as used by __builtin_object_size. 120942c8f87eb60958170c46767273bf93e6c96125bfJohn McCallQualType IntExprEvaluator::GetObjectType(const Expr *E) { 121042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 121142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) 121242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return VD->getType(); 121342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } else if (isa<CompoundLiteralExpr>(E)) { 121442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return E->getType(); 121542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } 121642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 121742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return QualType(); 121842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 121942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 12208cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::TryEvaluateBuiltinObjectSize(const CallExpr *E) { 122142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // TODO: Perhaps we should let LLVM lower this? 122242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall LValue Base; 122342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!EvaluatePointer(E->getArg(0), Base, Info)) 122442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 122542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 122642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // If we can prove the base is null, lower to zero now. 122742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall const Expr *LVBase = Base.getLValueBase(); 122842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!LVBase) return Success(0, E); 122942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 123042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall QualType T = GetObjectType(LVBase); 123142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (T.isNull() || 123242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isIncompleteType() || 12331357869bc5983cdfbc986db1f3d18265bb34cb0eEli Friedman T->isFunctionType() || 123442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isVariablyModifiedType() || 123542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isDependentType()) 123642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 123742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 123842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Size = Info.Ctx.getTypeSizeInChars(T); 123942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Offset = Base.getLValueOffset(); 124042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 124142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!Offset.isNegative() && Offset <= Size) 124242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size -= Offset; 124342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall else 124442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size = CharUnits::Zero(); 12454f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(Size, E); 124642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 124742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 12488cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::VisitCallExpr(const CallExpr *E) { 12493c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 1250019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner default: 12518cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitCallExpr(E); 125264eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 125364eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump case Builtin::BI__builtin_object_size: { 125442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (TryEvaluateBuiltinObjectSize(E)) 125542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 125664eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 1257b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // If evaluating the argument has side-effects we can't determine 1258b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // the size of the object and lower it to unknown now. 1259393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (E->getArg(0)->HasSideEffects(Info.Ctx)) { 12603f27b384801de26ce7efaa395699b42719372f24Benjamin Kramer if (E->getArg(1)->EvaluateAsInt(Info.Ctx).getZExtValue() <= 1) 1261cf184655319cf7a5b811067cff9d26a5741fd161Chris Lattner return Success(-1ULL, E); 126264eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Success(0, E); 126364eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 1264c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 126564eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 126664eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 126764eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 1268019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_classify_type: 1269131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(EvaluateBuiltinClassifyType(E), E); 12701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12714bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson case Builtin::BI__builtin_constant_p: 1272019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // __builtin_constant_p always has one operand: it returns true if that 1273019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // operand can be folded, false otherwise. 1274131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getArg(0)->isEvaluatable(Info.Ctx), E); 127521fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner 127621fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner case Builtin::BI__builtin_eh_return_data_regno: { 127721fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner int Operand = E->getArg(0)->EvaluateAsInt(Info.Ctx).getZExtValue(); 127821fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner Operand = Info.Ctx.Target.getEHDataRegisterNumber(Operand); 127921fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner return Success(Operand, E); 128021fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner } 1281c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman 1282c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman case Builtin::BI__builtin_expect: 1283c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman return Visit(E->getArg(0)); 12845726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 12855726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor case Builtin::BIstrlen: 12865726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor case Builtin::BI__builtin_strlen: 12875726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // As an extension, we support strlen() and __builtin_strlen() as constant 12885726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // expressions when the argument is a string literal. 12898cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (const StringLiteral *S 12905726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor = dyn_cast<StringLiteral>(E->getArg(0)->IgnoreParenImpCasts())) { 12915726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // The string literal may have embedded null characters. Find the first 12925726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // one and truncate there. 12935726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor llvm::StringRef Str = S->getString(); 12945726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor llvm::StringRef::size_type Pos = Str.find(0); 12955726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor if (Pos != llvm::StringRef::npos) 12965726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor Str = Str.substr(0, Pos); 12975726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 12985726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor return Success(Str.size(), E); 12995726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor } 13005726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 13015726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1302019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 13034c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 1304f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 1305b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 13062de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Comma) { 1307027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson if (!Visit(E->getRHS())) 1308027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return false; 13094fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson 131033ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // If we can't evaluate the LHS, it might have side effects; 131133ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // conservatively mark it. 131233ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 131333ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman Info.EvalResult.HasSideEffects = true; 1314c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner 1315027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return true; 1316a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1317a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1318a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->isLogicalOp()) { 1319a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // These need to be handled specially because the operands aren't 1320a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // necessarily integral 1321fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool lhsResult, rhsResult; 13221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1323fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getLHS(), lhsResult, Info)) { 132451fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // We were able to evaluate the LHS, see if we can get away with not 132551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // evaluating the RHS: 0 && X -> 0, 1 || X -> 1 13262de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (lhsResult == (E->getOpcode() == BO_LOr)) 13273f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(lhsResult, E); 1328a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1329fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 13302de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_LOr) 1331131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult || rhsResult, E); 13324bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson else 1333131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult && rhsResult, E); 13344bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 13354bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } else { 1336fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 13374bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // We can't evaluate the LHS; however, sometimes the result 13384bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // is determined by the RHS: X && 0 -> 0, X || 1 -> 1. 13392de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (rhsResult == (E->getOpcode() == BO_LOr) || 13402de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall !rhsResult == (E->getOpcode() == BO_LAnd)) { 1341131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // Since we weren't able to evaluate the left hand side, it 1342fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // must have had side effects. 1343fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson Info.EvalResult.HasSideEffects = true; 1344131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 1345131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(rhsResult, E); 13464bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 13474bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 1348a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1349a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1350a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1351c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner } 135254176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 1353286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType LHSTy = E->getLHS()->getType(); 1354286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType RHSTy = E->getRHS()->getType(); 13554087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 13564087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHSTy->isAnyComplexType()) { 13574087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar assert(RHSTy->isAnyComplexType() && "Invalid comparison"); 1358f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS, RHS; 13594087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 13604087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getLHS(), LHS, Info)) 13614087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 13624087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 13634087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 13644087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 13654087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 13664087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHS.isComplexFloat()) { 13671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_r = 13684087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatReal().compare(RHS.getComplexFloatReal()); 13691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_i = 13704087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatImag().compare(RHS.getComplexFloatImag()); 13714087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 13722de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) 1373131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((CR_r == APFloat::cmpEqual && 1374131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpEqual), E); 1375131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 13762de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(E->getOpcode() == BO_NE && 1377131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid complex comparison."); 13781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(((CR_r == APFloat::cmpGreaterThan || 1379fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpLessThan || 1380fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpUnordered) || 13811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (CR_i == APFloat::cmpGreaterThan || 1382fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpLessThan || 1383fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpUnordered)), E); 1384131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 13854087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } else { 13862de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) 1387131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() == RHS.getComplexIntReal() && 1388131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() == RHS.getComplexIntImag()), E); 1389131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 13902de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(E->getOpcode() == BO_NE && 1391131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid compex comparison."); 1392131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() != RHS.getComplexIntReal() || 1393131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() != RHS.getComplexIntImag()), E); 1394131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 13954087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 13964087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 13971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1398286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (LHSTy->isRealFloatingType() && 1399286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson RHSTy->isRealFloatingType()) { 1400286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat RHS(0.0), LHS(0.0); 14011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1402286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1403286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 14041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1405286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getLHS(), LHS, Info)) 1406286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 14071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1408286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat::cmpResult CR = LHS.compare(RHS); 1409529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson 1410286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson switch (E->getOpcode()) { 1411286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson default: 1412286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson assert(0 && "Invalid binary operator!"); 14132de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: 1414131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan, E); 14152de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: 1416131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan, E); 14172de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: 1418131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan || CR == APFloat::cmpEqual, E); 14192de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: 14201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan || CR == APFloat::cmpEqual, 1421131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 14222de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: 1423131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpEqual, E); 14242de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: 14251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan 1426fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpLessThan 1427fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpUnordered, E); 1428286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 1429286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 14301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1431ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (LHSTy->isPointerType() && RHSTy->isPointerType()) { 14322de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Sub || E->isEqualityOp()) { 1433efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LHSValue; 14343068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getLHS(), LHSValue, Info)) 14353068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1436a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1437efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue RHSValue; 14383068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getRHS(), RHSValue, Info)) 14393068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1440a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 14415bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // Reject any bases from the normal codepath; we special-case comparisons 14425bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // to null. 14435bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (LHSValue.getLValueBase()) { 14445bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 14455bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 1446a73058324197b7bdfd19307965954f626e26199dKen Dyck if (RHSValue.getLValueBase() || !RHSValue.getLValueOffset().isZero()) 14475bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 14485bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 14495bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(LHSValue, bres)) 14505bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 14512de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall return Success(bres ^ (E->getOpcode() == BO_EQ), E); 14525bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } else if (RHSValue.getLValueBase()) { 14535bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 14545bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 1455a73058324197b7bdfd19307965954f626e26199dKen Dyck if (LHSValue.getLValueBase() || !LHSValue.getLValueOffset().isZero()) 14565bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 14575bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 14585bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(RHSValue, bres)) 14595bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 14602de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall return Success(bres ^ (E->getOpcode() == BO_EQ), E); 14615bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } 1462a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 14632de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Sub) { 14644992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType Type = E->getLHS()->getType(); 14654992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType ElementType = Type->getAs<PointerType>()->getPointeeType(); 14663068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 1467a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits ElementSize = CharUnits::One(); 1468ce1bca73aef9bbf6359ab8420278203dda81a054Eli Friedman if (!ElementType->isVoidType() && !ElementType->isFunctionType()) 1469a73058324197b7bdfd19307965954f626e26199dKen Dyck ElementSize = Info.Ctx.getTypeSizeInChars(ElementType); 1470a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1471a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Diff = LHSValue.getLValueOffset() - 1472a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSValue.getLValueOffset(); 1473a73058324197b7bdfd19307965954f626e26199dKen Dyck return Success(Diff / ElementSize, E); 1474ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1475ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman bool Result; 14762de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) { 1477ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() == RHSValue.getLValueOffset(); 1478267c0ab1b9a15768f3f15abbfc40ce344751c78bEli Friedman } else { 1479ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() != RHSValue.getLValueOffset(); 1480ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1481ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman return Success(Result, E); 14823068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 14833068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 14842ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!LHSTy->isIntegralOrEnumerationType() || 14852ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor !RHSTy->isIntegralOrEnumerationType()) { 1486a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // We can't continue from here for non-integral types, and they 1487a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // could potentially confuse the following operations. 1488a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1489a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1490a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1491a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // The LHS of a constant expr is always evaluated and needed. 149230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Visit(E->getLHS())) 1493a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; // error in subexpression. 1494d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman 149542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APValue RHSVal; 149642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!EvaluateIntegerOrLValue(E->getRHS(), RHSVal, Info)) 149730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 149842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 149942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like (unsigned long)&a + 4. 150042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->isAdditiveOp() && Result.isLValue() && RHSVal.isInt()) { 1501a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Offset = Result.getLValueOffset(); 1502a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits AdditionalOffset = CharUnits::fromQuantity( 1503a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSVal.getInt().getZExtValue()); 15042de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add) 1505a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset += AdditionalOffset; 150642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman else 1507a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset -= AdditionalOffset; 1508a73058324197b7bdfd19307965954f626e26199dKen Dyck Result = APValue(Result.getLValueBase(), Offset); 150942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 151042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 151142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 151242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like 4 + (unsigned long)&a 15132de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add && 151442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman RHSVal.isLValue() && Result.isInt()) { 1515a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Offset = RHSVal.getLValueOffset(); 1516a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset += CharUnits::fromQuantity(Result.getInt().getZExtValue()); 1517a73058324197b7bdfd19307965954f626e26199dKen Dyck Result = APValue(RHSVal.getLValueBase(), Offset); 151842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 151942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 152042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 152142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // All the following cases expect both operands to be an integer 152242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!Result.isInt() || !RHSVal.isInt()) 1523b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1524a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 152542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APSInt& RHS = RHSVal.getInt(); 152642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 1527a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson switch (E->getOpcode()) { 152832fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner default: 15290e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 15302de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: return Success(Result.getInt() * RHS, E); 15312de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: return Success(Result.getInt() + RHS, E); 15322de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: return Success(Result.getInt() - RHS, E); 15332de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_And: return Success(Result.getInt() & RHS, E); 15342de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Xor: return Success(Result.getInt() ^ RHS, E); 15352de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Or: return Success(Result.getInt() | RHS, E); 15362de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 153754176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 15380e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 153930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() / RHS, E); 15402de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Rem: 154154176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 15420e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 154330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() % RHS, E); 15442de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shl: { 1545091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall // During constant-folding, a negative shift is an opposite shift. 1546091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall if (RHS.isSigned() && RHS.isNegative()) { 1547091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall RHS = -RHS; 1548091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall goto shift_right; 1549091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall } 1550091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall 1551091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall shift_left: 1552091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall unsigned SA 1553091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall = (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 155430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() << SA, E); 15553f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 15562de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shr: { 1557091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall // During constant-folding, a negative shift is an opposite shift. 1558091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall if (RHS.isSigned() && RHS.isNegative()) { 1559091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall RHS = -RHS; 1560091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall goto shift_left; 1561091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall } 1562091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall 1563091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall shift_right: 15641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 156530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 156630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() >> SA, E); 15673f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 15681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15692de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: return Success(Result.getInt() < RHS, E); 15702de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: return Success(Result.getInt() > RHS, E); 15712de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: return Success(Result.getInt() <= RHS, E); 15722de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: return Success(Result.getInt() >= RHS, E); 15732de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: return Success(Result.getInt() == RHS, E); 15742de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: return Success(Result.getInt() != RHS, E); 1575b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 1576a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 1577a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 15788b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfType(QualType T) { 15795d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 15805d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 15815d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 15825d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 15835d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = T->getAs<ReferenceType>()) 15845d484e8cf710207010720589d89602233de61d01Sebastian Redl T = Ref->getPointeeType(); 15855d484e8cf710207010720589d89602233de61d01Sebastian Redl 15862be586108bb401019647791feca19ea03fd477ceEli Friedman // __alignof is defined to return the preferred alignment. 1587fb1e3bc29b667f4275e1d5a43d64ec173f4f9a7dKen Dyck return Info.Ctx.toCharUnitsFromBits( 1588fb1e3bc29b667f4275e1d5a43d64ec173f4f9a7dKen Dyck Info.Ctx.getPreferredTypeAlign(T.getTypePtr())); 1589e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1590e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 15918b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfExpr(const Expr *E) { 1592af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner E = E->IgnoreParens(); 1593af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1594af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // alignof decl is always accepted, even if it doesn't make sense: we default 15951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // to 1 in those cases. 1596af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 15978b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(DRE->getDecl(), 15988b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 1599a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1600af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) 16018b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(ME->getMemberDecl(), 16028b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 1603af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1604e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(E->getType()); 1605e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1606e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1607e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1608f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne/// VisitUnaryExprOrTypeTraitExpr - Evaluate a sizeof, alignof or vec_step with 1609f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne/// a result as the expression's type. 1610f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbournebool IntExprEvaluator::VisitUnaryExprOrTypeTraitExpr( 1611f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne const UnaryExprOrTypeTraitExpr *E) { 1612f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne switch(E->getKind()) { 1613f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case UETT_AlignOf: { 1614e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (E->isArgumentType()) 16154f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(GetAlignOfType(E->getArgumentType()), E); 1616e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner else 16174f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(GetAlignOfExpr(E->getArgumentExpr()), E); 1618e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner } 1619a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1620f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case UETT_VecStep: { 1621f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne QualType Ty = E->getTypeOfArgument(); 16220518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 1623f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (Ty->isVectorType()) { 1624f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne unsigned n = Ty->getAs<VectorType>()->getNumElements(); 1625a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1626f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // The vec_step built-in functions that take a 3-component 1627f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // vector return 4. (OpenCL 1.1 spec 6.11.12) 1628f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (n == 3) 1629f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne n = 4; 1630f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 1631f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return Success(n, E); 1632f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } else 1633f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return Success(1, E); 1634f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } 1635f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 1636f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case UETT_SizeOf: { 1637f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne QualType SrcTy = E->getTypeOfArgument(); 1638f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 1639f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // the result is the size of the referenced type." 1640f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 1641f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // result shall be the alignment of the referenced type." 1642f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (const ReferenceType *Ref = SrcTy->getAs<ReferenceType>()) 1643f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne SrcTy = Ref->getPointeeType(); 1644f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 1645f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc 1646f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // extension. 1647f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (SrcTy->isVoidType() || SrcTy->isFunctionType()) 1648f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return Success(1, E); 1649f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 1650f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. 1651f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (!SrcTy->isConstantSizeType()) 1652f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return false; 1653f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 1654f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // Get information about the size. 1655f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return Success(Info.Ctx.getTypeSizeInChars(SrcTy), E); 1656f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } 1657f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } 1658f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 1659f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne llvm_unreachable("unknown expr/type trait"); 1660f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return false; 1661fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner} 1662fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 16638cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::VisitOffsetOfExpr(const OffsetOfExpr *OOE) { 16648ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits Result; 16658cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne unsigned n = OOE->getNumComponents(); 16668ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (n == 0) 16678ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 16688cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne QualType CurrentType = OOE->getTypeSourceInfo()->getType(); 16698ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor for (unsigned i = 0; i != n; ++i) { 16708ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor OffsetOfExpr::OffsetOfNode ON = OOE->getComponent(i); 16718ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor switch (ON.getKind()) { 16728ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Array: { 16738cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr *Idx = OOE->getIndexExpr(ON.getArrayExprIndex()); 16748ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor APSInt IdxResult; 16758ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!EvaluateInteger(Idx, IdxResult, Info)) 16768ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 16778ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ArrayType *AT = Info.Ctx.getAsArrayType(CurrentType); 16788ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!AT) 16798ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 16808ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = AT->getElementType(); 16818ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits ElementSize = Info.Ctx.getTypeSizeInChars(CurrentType); 16828ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Result += IdxResult.getSExtValue() * ElementSize; 16838ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 16848ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 16858ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 16868ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Field: { 16878ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor FieldDecl *MemberDecl = ON.getField(); 16888ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 16898ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!RT) 16908ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 16918ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor RecordDecl *RD = RT->getDecl(); 16928ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 1693ba4f5d5754c8291690d01ca9581926673d69b24cJohn McCall unsigned i = MemberDecl->getFieldIndex(); 1694cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor assert(i < RL.getFieldCount() && "offsetof field in wrong type"); 1695fb1e3bc29b667f4275e1d5a43d64ec173f4f9a7dKen Dyck Result += Info.Ctx.toCharUnitsFromBits(RL.getFieldOffset(i)); 16968ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = MemberDecl->getType().getNonReferenceType(); 16978ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 16988ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 16998ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 17008ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Identifier: 17018ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor llvm_unreachable("dependent __builtin_offsetof"); 1702cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1703cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1704cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor case OffsetOfExpr::OffsetOfNode::Base: { 1705cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CXXBaseSpecifier *BaseSpec = ON.getBase(); 1706cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (BaseSpec->isVirtual()) 1707cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1708cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1709cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the layout of the class whose base we are looking into. 1710cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 1711cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (!RT) 1712cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1713cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor RecordDecl *RD = RT->getDecl(); 1714cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 1715cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1716cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the base class itself. 1717cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CurrentType = BaseSpec->getType(); 1718cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *BaseRT = CurrentType->getAs<RecordType>(); 1719cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (!BaseRT) 1720cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1721cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1722cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Add the offset to the base. 17237c7f820d70c925b29290a8563b59615816a827fcKen Dyck Result += RL.getBaseClassOffset(cast<CXXRecordDecl>(BaseRT->getDecl())); 1724cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor break; 1725cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor } 17268ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 17278ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 17288cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Success(Result, OOE); 17298ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor} 17308ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 1731b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 17322de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == UO_LNot) { 1733a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // LNot's operand isn't necessarily an integer, so we handle it specially. 1734a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman bool bres; 1735a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!HandleConversionToBool(E->getSubExpr(), bres, Info)) 1736a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1737131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(!bres, E); 1738a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1739a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 17404fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar // Only handle integral operations... 17412ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!E->getSubExpr()->getType()->isIntegralOrEnumerationType()) 17424fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar return false; 17434fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar 174487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner // Get the operand value into 'Result'. 174587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!Visit(E->getSubExpr())) 174675a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner return false; 1747a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 174875a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner switch (E->getOpcode()) { 17494c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner default: 175075a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 175175a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // See C99 6.6p3. 17520e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 17532de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: 17544c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // FIXME: Should extension allow i-c-e extension expressions in its scope? 17554c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // If so, we could clear the diagnostic ID. 17563f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 17572de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 17581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // The result is always just the subexpr. 17593f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 17602de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 176130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 176230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(-Result.getInt(), E); 17632de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 176430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 176530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(~Result.getInt(), E); 176606a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson } 1767a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 17681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1769732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// HandleCast - This is used to evaluate implicit or explicit casts where the 1770732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// result type is integer. 17718cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::VisitCastExpr(const CastExpr *E) { 17728cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr *SubExpr = E->getSubExpr(); 177382206e267ce6cc709797127616f64672d255b310Anders Carlsson QualType DestType = E->getType(); 1774b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar QualType SrcType = SubExpr->getType(); 177582206e267ce6cc709797127616f64672d255b310Anders Carlsson 177646a523285928aa07bf14803178dc04616ac85994Eli Friedman switch (E->getCastKind()) { 177746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_BaseToDerived: 177846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_DerivedToBase: 177946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_UncheckedDerivedToBase: 178046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_Dynamic: 178146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ToUnion: 178246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ArrayToPointerDecay: 178346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FunctionToPointerDecay: 178446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_NullToPointer: 178546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_NullToMemberPointer: 178646a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_BaseToDerivedMemberPointer: 178746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_DerivedToBaseMemberPointer: 178846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ConstructorConversion: 178946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralToPointer: 179046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ToVoid: 179146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_VectorSplat: 179246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralToFloating: 179346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingCast: 179446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_AnyPointerToObjCPointerCast: 179546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_AnyPointerToBlockPointerCast: 179646a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ObjCObjectLValueCast: 179746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingRealToComplex: 179846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexToReal: 179946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexCast: 180046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexToIntegralComplex: 180146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralRealToComplex: 180246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexCast: 180346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexToFloatingComplex: 180446a523285928aa07bf14803178dc04616ac85994Eli Friedman llvm_unreachable("invalid cast kind for integral value"); 180546a523285928aa07bf14803178dc04616ac85994Eli Friedman 1806e50c297f92914ca996deb8b597624193273b62e4Eli Friedman case CK_BitCast: 180746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_Dependent: 180846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_GetObjCProperty: 180946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_LValueBitCast: 181046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_UserDefinedConversion: 1811f85e193739c953358c865005855253af4f68a497John McCall case CK_ObjCProduceObject: 1812f85e193739c953358c865005855253af4f68a497John McCall case CK_ObjCConsumeObject: 181346a523285928aa07bf14803178dc04616ac85994Eli Friedman return false; 181446a523285928aa07bf14803178dc04616ac85994Eli Friedman 181546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_LValueToRValue: 181646a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_NoOp: 181746a523285928aa07bf14803178dc04616ac85994Eli Friedman return Visit(E->getSubExpr()); 181846a523285928aa07bf14803178dc04616ac85994Eli Friedman 181946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_MemberPointerToBoolean: 182046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_PointerToBoolean: 182146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralToBoolean: 182246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingToBoolean: 182346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexToBoolean: 182446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexToBoolean: { 18254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 18264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(SubExpr, BoolResult, Info)) 18274efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1828131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(BoolResult, E); 18294efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 18304efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 183146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralCast: { 1832732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!Visit(SubExpr)) 1833b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1834a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1835be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!Result.isInt()) { 1836be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // Only allow casts of lvalues if they are lossless. 1837be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return Info.Ctx.getTypeSize(DestType) == Info.Ctx.getTypeSize(SrcType); 1838be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 183930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 1840dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, 184130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt(), Info.Ctx), E); 1842732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner } 18431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 184446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_PointerToIntegral: { 1845efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 184687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(SubExpr, LV, Info)) 1847b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 18484efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1849dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (LV.getLValueBase()) { 1850dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar // Only allow based lvalue casts if they are lossless. 1851dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(SrcType)) 1852dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return false; 1853dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar 1854efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result); 1855dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return true; 1856dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar } 18574efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1858a73058324197b7bdfd19307965954f626e26199dKen Dyck APSInt AsInt = Info.Ctx.MakeIntValue(LV.getLValueOffset().getQuantity(), 1859a73058324197b7bdfd19307965954f626e26199dKen Dyck SrcType); 1860dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, AsInt, Info.Ctx), E); 18612bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 18624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 186346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexToReal: { 1864f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue C; 18651725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (!EvaluateComplex(SubExpr, C, Info)) 18661725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return false; 186746a523285928aa07bf14803178dc04616ac85994Eli Friedman return Success(C.getComplexIntReal(), E); 18681725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 18692217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 187046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingToIntegral: { 187146a523285928aa07bf14803178dc04616ac85994Eli Friedman APFloat F(0.0); 187246a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!EvaluateFloat(SubExpr, F, Info)) 187346a523285928aa07bf14803178dc04616ac85994Eli Friedman return false; 1874732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 187546a523285928aa07bf14803178dc04616ac85994Eli Friedman return Success(HandleFloatToIntCast(DestType, SrcType, F, Info.Ctx), E); 187646a523285928aa07bf14803178dc04616ac85994Eli Friedman } 187746a523285928aa07bf14803178dc04616ac85994Eli Friedman } 18781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 187946a523285928aa07bf14803178dc04616ac85994Eli Friedman llvm_unreachable("unknown cast resulting in integral value"); 188046a523285928aa07bf14803178dc04616ac85994Eli Friedman return false; 1881a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 18822bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 1883722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedmanbool IntExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 1884722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 1885f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 1886722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1887722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1888722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntReal(), E); 1889722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1890722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1891722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Visit(E->getSubExpr()); 1892722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman} 1893722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1894664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedmanbool IntExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 1895722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isComplexIntegerType()) { 1896f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 1897722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1898722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1899722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntImag(), E); 1900722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1901722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1902664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 1903664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman Info.EvalResult.HasSideEffects = true; 1904664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 1905664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman} 1906664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 1907ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregorbool IntExprEvaluator::VisitSizeOfPackExpr(const SizeOfPackExpr *E) { 1908ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor return Success(E->getPackLength(), E); 1909ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor} 1910ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor 1911295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redlbool IntExprEvaluator::VisitCXXNoexceptExpr(const CXXNoexceptExpr *E) { 1912295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl return Success(E->getValue(), E); 1913295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl} 1914295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl 1915f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1916d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman// Float Evaluation 1917d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1918d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1919d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmannamespace { 1920770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass FloatExprEvaluator 19218cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<FloatExprEvaluator, bool> { 1922d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat &Result; 1923d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanpublic: 1924d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman FloatExprEvaluator(EvalInfo &info, APFloat &result) 19258cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(result) {} 1926d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 19278cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const APValue &V, const Expr *e) { 19288cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result = V.getFloat(); 19298cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 19308cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 19318cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Error(const Stmt *S) { 1932d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1933d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1934d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1935019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner bool VisitCallExpr(const CallExpr *E); 1936d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 19375db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar bool VisitUnaryOperator(const UnaryOperator *E); 1938d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 1939d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitFloatingLiteral(const FloatingLiteral *E); 19408cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E); 19418cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E); 19422217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1943abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryReal(const UnaryOperator *E); 1944abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryImag(const UnaryOperator *E); 1945ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 1946189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall bool VisitDeclRefExpr(const DeclRefExpr *E); 1947189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1948abd3a857ace59100305790545d1baae5877b8945John McCall // FIXME: Missing: array subscript of vector, member of vector, 1949abd3a857ace59100305790545d1baae5877b8945John McCall // ImplicitValueInitExpr 1950d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman}; 1951d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} // end anonymous namespace 1952d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1953d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) { 19547db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall assert(E->getType()->isRealFloatingType()); 19558cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return FloatExprEvaluator(Info, Result).Visit(E); 1956d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1957d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 19584ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadstatic bool TryEvaluateBuiltinNaN(const ASTContext &Context, 1959db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall QualType ResultTy, 1960db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const Expr *Arg, 1961db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall bool SNaN, 1962db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APFloat &Result) { 1963db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const StringLiteral *S = dyn_cast<StringLiteral>(Arg->IgnoreParenCasts()); 1964db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (!S) return false; 1965db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1966db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const llvm::fltSemantics &Sem = Context.getFloatTypeSemantics(ResultTy); 1967db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1968db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APInt fill; 1969db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1970db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall // Treat empty strings as if they were zero. 1971db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (S->getString().empty()) 1972db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall fill = llvm::APInt(32, 0); 1973db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else if (S->getString().getAsInteger(0, fill)) 1974db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return false; 1975db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1976db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (SNaN) 1977db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getSNaN(Sem, false, &fill); 1978db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else 1979db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getQNaN(Sem, false, &fill); 1980db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return true; 1981db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall} 1982db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1983019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattnerbool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) { 19843c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 19858cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne default: 19868cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitCallExpr(E); 19878cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 1988019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_val: 1989019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_valf: 1990019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_vall: 1991019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inf: 1992019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inff: 19937cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar case Builtin::BI__builtin_infl: { 19947cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 19957cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 199634a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner Result = llvm::APFloat::getInf(Sem); 199734a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner return true; 19987cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar } 19991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2000db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nans: 2001db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansf: 2002db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansl: 2003db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 2004db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall true, Result); 2005db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 20069e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nan: 20079e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanf: 20089e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanl: 20094572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump // If this is __builtin_nan() turn this into a nan, otherwise we 20109e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // can't constant fold it. 2011db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 2012db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall false, Result); 20135db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 20145db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabs: 20155db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsf: 20165db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsl: 20175db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info)) 20185db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 20191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20205db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (Result.isNegative()) 20215db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 20225db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 20235db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 20241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysign: 20251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysignf: 20265db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignl: { 20275db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.); 20285db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info) || 20295db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar !EvaluateFloat(E->getArg(1), RHS, Info)) 20305db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 20315db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.copySign(RHS); 20325db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 20335db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 2034019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 2035019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner} 2036019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 2037189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCallbool FloatExprEvaluator::VisitDeclRefExpr(const DeclRefExpr *E) { 20388cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (ExprEvaluatorBaseTy::VisitDeclRefExpr(E)) 20398cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 20408cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 2041189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall const Decl *D = E->getDecl(); 2042189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (!isa<VarDecl>(D) || isa<ParmVarDecl>(D)) return false; 2043189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall const VarDecl *VD = cast<VarDecl>(D); 2044189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 2045189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall // Require the qualifiers to be const and not volatile. 2046189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall CanQualType T = Info.Ctx.getCanonicalType(E->getType()); 2047189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (!T.isConstQualified() || T.isVolatileQualified()) 2048189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 2049189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 2050189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall const Expr *Init = VD->getAnyInitializer(); 2051189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (!Init) return false; 2052189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 2053189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (APValue *V = VD->getEvaluatedValue()) { 2054189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (V->isFloat()) { 2055189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall Result = V->getFloat(); 2056189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return true; 2057189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall } 2058189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 2059189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall } 2060189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 2061189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (VD->isEvaluatingValue()) 2062189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 2063189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 2064189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall VD->setEvaluatingValue(); 2065189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 2066189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall Expr::EvalResult InitResult; 2067189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (Init->Evaluate(InitResult, Info.Ctx) && !InitResult.HasSideEffects && 2068189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall InitResult.Val.isFloat()) { 2069189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall // Cache the evaluated value in the variable declaration. 2070189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall Result = InitResult.Val.getFloat(); 2071189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall VD->setEvaluatedValue(InitResult.Val); 2072189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return true; 2073189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall } 2074189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 2075189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall VD->setEvaluatedValue(APValue()); 2076189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 2077189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall} 2078189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 2079abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 208043efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 208143efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman ComplexValue CV; 208243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 208343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return false; 208443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = CV.FloatReal; 208543efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return true; 208643efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman } 208743efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman 208843efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return Visit(E->getSubExpr()); 2089abd3a857ace59100305790545d1baae5877b8945John McCall} 2090abd3a857ace59100305790545d1baae5877b8945John McCall 2091abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 209243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 209343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman ComplexValue CV; 209443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 209543efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return false; 209643efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = CV.FloatImag; 209743efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return true; 209843efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman } 209943efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman 210043efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 210143efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Info.EvalResult.HasSideEffects = true; 210243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman const llvm::fltSemantics &Sem = Info.Ctx.getFloatTypeSemantics(E->getType()); 210343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = llvm::APFloat::getZero(Sem); 2104abd3a857ace59100305790545d1baae5877b8945John McCall return true; 2105abd3a857ace59100305790545d1baae5877b8945John McCall} 2106abd3a857ace59100305790545d1baae5877b8945John McCall 21075db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbarbool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 21082de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == UO_Deref) 2109a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes return false; 2110a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes 21115db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getSubExpr(), Result, Info)) 21125db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 21135db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 21145db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar switch (E->getOpcode()) { 21155db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar default: return false; 21162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 21175db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 21182de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 21195db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 21205db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 21215db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 21225db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar} 2123019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 2124d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 21252de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Comma) { 21267f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!EvaluateFloat(E->getRHS(), Result, Info)) 21277f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return false; 21287f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 21297f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // If we can't evaluate the LHS, it might have side effects; 21307f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // conservatively mark it. 21317f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 21327f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman Info.EvalResult.HasSideEffects = true; 21337f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 21347f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return true; 21357f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman } 21367f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 213796e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson // We can't evaluate pointer-to-member operations. 213896e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson if (E->isPtrMemOp()) 213996e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson return false; 214096e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson 2141d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // FIXME: Diagnostics? I really don't understand how the warnings 2142d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // and errors are supposed to work. 21435db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.0); 2144d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getLHS(), Result, Info)) 2145d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 2146d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getRHS(), RHS, Info)) 2147d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 2148d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 2149d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman switch (E->getOpcode()) { 2150d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman default: return false; 21512de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 2152d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.multiply(RHS, APFloat::rmNearestTiesToEven); 2153d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 21542de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 2155d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.add(RHS, APFloat::rmNearestTiesToEven); 2156d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 21572de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 2158d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.subtract(RHS, APFloat::rmNearestTiesToEven); 2159d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 21602de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 2161d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.divide(RHS, APFloat::rmNearestTiesToEven); 2162d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 2163d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 2164d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 2165d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 2166d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) { 2167d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result = E->getValue(); 2168d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 2169d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 2170d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 21718cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool FloatExprEvaluator::VisitCastExpr(const CastExpr *E) { 21728cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr* SubExpr = E->getSubExpr(); 21731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21742a523eec6a31955be876625819b89e8dc5def707Eli Friedman switch (E->getCastKind()) { 21752a523eec6a31955be876625819b89e8dc5def707Eli Friedman default: 21762a523eec6a31955be876625819b89e8dc5def707Eli Friedman return false; 21772a523eec6a31955be876625819b89e8dc5def707Eli Friedman 21782a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_LValueToRValue: 21792a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_NoOp: 21802a523eec6a31955be876625819b89e8dc5def707Eli Friedman return Visit(SubExpr); 21812a523eec6a31955be876625819b89e8dc5def707Eli Friedman 21822a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_IntegralToFloating: { 21834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 21843f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!EvaluateInteger(SubExpr, IntResult, Info)) 21854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 21861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result = HandleIntToFloatCast(E->getType(), SubExpr->getType(), 2187a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar IntResult, Info.Ctx); 21884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 21894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 21902a523eec6a31955be876625819b89e8dc5def707Eli Friedman 21912a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_FloatingCast: { 21924efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!Visit(SubExpr)) 21934efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 2194a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(E->getType(), SubExpr->getType(), 2195a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result, Info.Ctx); 21964efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 21974efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2198f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall 21992a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_FloatingComplexToReal: { 2200f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall ComplexValue V; 2201f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall if (!EvaluateComplex(SubExpr, V, Info)) 2202f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall return false; 2203f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall Result = V.getComplexFloatReal(); 2204f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall return true; 2205f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall } 22062a523eec6a31955be876625819b89e8dc5def707Eli Friedman } 22074efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 22084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 22094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 22104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 22118cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool FloatExprEvaluator::VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E) { 22124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(E->getType())); 22134efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 22144efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 22154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2216d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 2217a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar// Complex Evaluation (for float and integer) 22189ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 22199ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 22209ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonnamespace { 2221770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass ComplexExprEvaluator 22228cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<ComplexExprEvaluator, bool> { 2223f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue &Result; 22241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22259ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonpublic: 2226f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexExprEvaluator(EvalInfo &info, ComplexValue &Result) 22278cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(Result) {} 22281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22298cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const APValue &V, const Expr *e) { 22308cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result.setFrom(V); 22318cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 22328cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 22338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Error(const Expr *E) { 2234f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 22359ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 22361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22378cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 22388cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne // Visitor Methods 22398cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 22409ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 22418cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitImaginaryLiteral(const ImaginaryLiteral *E); 2242a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 22438cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E); 2244b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2245b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 224696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara bool VisitUnaryOperator(const UnaryOperator *E); 224796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // FIXME Missing: ImplicitValueInitExpr 2248b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman}; 2249b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} // end anonymous namespace 22501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2251b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedmanstatic bool EvaluateComplex(const Expr *E, ComplexValue &Result, 2252b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman EvalInfo &Info) { 2253b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman assert(E->getType()->isAnyComplexType()); 22548cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ComplexExprEvaluator(Info, Result).Visit(E); 2255b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} 2256b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 22578cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool ComplexExprEvaluator::VisitImaginaryLiteral(const ImaginaryLiteral *E) { 22588cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr* SubExpr = E->getSubExpr(); 2259b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2260b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (SubExpr->getType()->isRealFloatingType()) { 2261b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexFloat(); 2262b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APFloat &Imag = Result.FloatImag; 2263b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateFloat(SubExpr, Imag, Info)) 2264b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2265b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2266b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatReal = APFloat(Imag.getSemantics()); 2267b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 2268b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } else { 2269b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman assert(SubExpr->getType()->isIntegerType() && 2270b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman "Unexpected imaginary literal."); 2271b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2272b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexInt(); 2273b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APSInt &Imag = Result.IntImag; 2274b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateInteger(SubExpr, Imag, Info)) 2275b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2276b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2277b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntReal = APSInt(Imag.getBitWidth(), !Imag.isSigned()); 2278b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 2279b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } 2280b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} 2281b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 22828cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool ComplexExprEvaluator::VisitCastExpr(const CastExpr *E) { 2283b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 22848786da77984e81d48e0e1b2bd339809b1efc19f3John McCall switch (E->getCastKind()) { 22858786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BitCast: 22868786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BaseToDerived: 22878786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_DerivedToBase: 22888786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_UncheckedDerivedToBase: 22898786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_Dynamic: 22908786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ToUnion: 22918786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ArrayToPointerDecay: 22928786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FunctionToPointerDecay: 22938786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NullToPointer: 22948786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NullToMemberPointer: 22958786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BaseToDerivedMemberPointer: 22968786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_DerivedToBaseMemberPointer: 22978786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_MemberPointerToBoolean: 22988786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ConstructorConversion: 22998786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToPointer: 23008786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_PointerToIntegral: 23018786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_PointerToBoolean: 23028786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ToVoid: 23038786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_VectorSplat: 23048786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralCast: 23058786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToBoolean: 23068786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToFloating: 23078786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingToIntegral: 23088786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingToBoolean: 23098786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingCast: 23108786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_AnyPointerToObjCPointerCast: 23118786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_AnyPointerToBlockPointerCast: 23128786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ObjCObjectLValueCast: 23138786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToReal: 23148786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToBoolean: 23158786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToReal: 23168786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToBoolean: 2317f85e193739c953358c865005855253af4f68a497John McCall case CK_ObjCProduceObject: 2318f85e193739c953358c865005855253af4f68a497John McCall case CK_ObjCConsumeObject: 23198786da77984e81d48e0e1b2bd339809b1efc19f3John McCall llvm_unreachable("invalid cast kind for complex value"); 23208786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23218786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_LValueToRValue: 23228786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NoOp: 23238786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return Visit(E->getSubExpr()); 23242bb5d00fcf71a7b4d478d478be778fff0494aff6John McCall 23258786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_Dependent: 23268786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_GetObjCProperty: 232746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_LValueBitCast: 23288786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_UserDefinedConversion: 23298786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 23308786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23318786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingRealToComplex: { 2332b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APFloat &Real = Result.FloatReal; 23338786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!EvaluateFloat(E->getSubExpr(), Real, Info)) 2334b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2335b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 23368786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexFloat(); 23378786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatImag = APFloat(Real.getSemantics()); 23388786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 23398786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 23408786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23418786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexCast: { 23428786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 23438786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 23448786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23458786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 23468786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 23478786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 23488786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23498786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatReal 23508786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = HandleFloatToFloatCast(To, From, Result.FloatReal, Info.Ctx); 23518786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatImag 23528786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = HandleFloatToFloatCast(To, From, Result.FloatImag, Info.Ctx); 23538786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 23548786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 23558786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23568786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToIntegralComplex: { 23578786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 23588786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 23598786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23608786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 23618786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 23628786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 23638786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexInt(); 23648786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntReal = HandleFloatToIntCast(To, From, Result.FloatReal, Info.Ctx); 23658786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntImag = HandleFloatToIntCast(To, From, Result.FloatImag, Info.Ctx); 23668786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 23678786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 23688786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23698786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralRealToComplex: { 2370b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APSInt &Real = Result.IntReal; 23718786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!EvaluateInteger(E->getSubExpr(), Real, Info)) 2372b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 23739ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 23748786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexInt(); 23758786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntImag = APSInt(Real.getBitWidth(), !Real.isSigned()); 23768786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 23778786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 23788786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23798786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexCast: { 23808786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 2381b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2382ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 23838786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 23848786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 23858786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 23861725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 23878786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntReal = HandleIntToIntCast(To, From, Result.IntReal, Info.Ctx); 23888786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntImag = HandleIntToIntCast(To, From, Result.IntImag, Info.Ctx); 23898786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 23908786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 23918786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23928786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToFloatingComplex: { 23938786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 23948786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 23958786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23968786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 23978786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 23988786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 23998786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexFloat(); 24008786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatReal = HandleIntToFloatCast(To, From, Result.IntReal, Info.Ctx); 24018786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatImag = HandleIntToFloatCast(To, From, Result.IntImag, Info.Ctx); 24028786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 24038786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 2404ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 24051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24068786da77984e81d48e0e1b2bd339809b1efc19f3John McCall llvm_unreachable("unknown cast resulting in complex value"); 2407b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 24089ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} 24099ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2410f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallbool ComplexExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 241196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (E->getOpcode() == BO_Comma) { 241296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (!Visit(E->getRHS())) 241396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 241496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 241596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // If we can't evaluate the LHS, it might have side effects; 241696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // conservatively mark it. 241796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (!E->getLHS()->isEvaluatable(Info.Ctx)) 241896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Info.EvalResult.HasSideEffects = true; 241996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 242096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 242196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 2422f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (!Visit(E->getLHS())) 2423f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 24241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2425f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue RHS; 2426a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 2427f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 2428a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 24293f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar assert(Result.isComplexFloat() == RHS.isComplexFloat() && 24303f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar "Invalid operands to binary operator."); 2431ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson switch (E->getOpcode()) { 2432f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall default: return false; 24332de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 2434a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 2435a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().add(RHS.getComplexFloatReal(), 2436a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2437a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().add(RHS.getComplexFloatImag(), 2438a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2439a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 2440a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() += RHS.getComplexIntReal(); 2441a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() += RHS.getComplexIntImag(); 2442a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 24433f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 24442de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 2445a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 2446a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().subtract(RHS.getComplexFloatReal(), 2447a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2448a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().subtract(RHS.getComplexFloatImag(), 2449a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2450a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 2451a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() -= RHS.getComplexIntReal(); 2452a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() -= RHS.getComplexIntImag(); 2453a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 24543f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 24552de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 24563f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar if (Result.isComplexFloat()) { 2457f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 24583f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_r = LHS.getComplexFloatReal(); 24593f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_i = LHS.getComplexFloatImag(); 24603f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_r = RHS.getComplexFloatReal(); 24613f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_i = RHS.getComplexFloatImag(); 24621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24633f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat Tmp = LHS_r; 24643f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 24653f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal() = Tmp; 24663f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 24673f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 24683f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal().subtract(Tmp, APFloat::rmNearestTiesToEven); 24693f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 24703f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_r; 24713f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 24723f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag() = Tmp; 24733f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 24743f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 24753f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag().add(Tmp, APFloat::rmNearestTiesToEven); 24763f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } else { 2477f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 24781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntReal() = 24793f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntReal() - 24803f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntImag()); 24811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntImag() = 24823f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntImag() + 24833f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntReal()); 24843f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } 24853f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 248696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case BO_Div: 248796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) { 248896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara ComplexValue LHS = Result; 248996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &LHS_r = LHS.getComplexFloatReal(); 249096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &LHS_i = LHS.getComplexFloatImag(); 249196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &RHS_r = RHS.getComplexFloatReal(); 249296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &RHS_i = RHS.getComplexFloatImag(); 249396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &Res_r = Result.getComplexFloatReal(); 249496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &Res_i = Result.getComplexFloatImag(); 249596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 249696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat Den = RHS_r; 249796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Den.multiply(RHS_r, APFloat::rmNearestTiesToEven); 249896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat Tmp = RHS_i; 249996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 250096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Den.add(Tmp, APFloat::rmNearestTiesToEven); 250196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 250296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r = LHS_r; 250396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.multiply(RHS_r, APFloat::rmNearestTiesToEven); 250496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp = LHS_i; 250596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 250696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.add(Tmp, APFloat::rmNearestTiesToEven); 250796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.divide(Den, APFloat::rmNearestTiesToEven); 250896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 250996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i = LHS_i; 251096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.multiply(RHS_r, APFloat::rmNearestTiesToEven); 251196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp = LHS_r; 251296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 251396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.subtract(Tmp, APFloat::rmNearestTiesToEven); 251496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.divide(Den, APFloat::rmNearestTiesToEven); 251596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } else { 251696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (RHS.getComplexIntReal() == 0 && RHS.getComplexIntImag() == 0) { 251796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // FIXME: what about diagnostics? 251896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 251996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 252096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara ComplexValue LHS = Result; 252196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APSInt Den = RHS.getComplexIntReal() * RHS.getComplexIntReal() + 252296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara RHS.getComplexIntImag() * RHS.getComplexIntImag(); 252396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntReal() = 252496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara (LHS.getComplexIntReal() * RHS.getComplexIntReal() + 252596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara LHS.getComplexIntImag() * RHS.getComplexIntImag()) / Den; 252696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = 252796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara (LHS.getComplexIntImag() * RHS.getComplexIntReal() - 252896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara LHS.getComplexIntReal() * RHS.getComplexIntImag()) / Den; 252996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 253096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara break; 2531ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 2532ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 2533f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2534ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson} 2535ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 253696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnarabool ComplexExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 253796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // Get the operand value into 'Result'. 253896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (!Visit(E->getSubExpr())) 253996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 254096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 254196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara switch (E->getOpcode()) { 254296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara default: 254396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // FIXME: what about diagnostics? 254496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 254596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Extension: 254696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 254796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Plus: 254896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // The result is always just the subexpr. 254996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 255096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Minus: 255196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) { 255296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatReal().changeSign(); 255396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatImag().changeSign(); 255496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 255596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara else { 255696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntReal() = -Result.getComplexIntReal(); 255796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = -Result.getComplexIntImag(); 255896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 255996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 256096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Not: 256196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) 256296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatImag().changeSign(); 256396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara else 256496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = -Result.getComplexIntImag(); 256596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 256696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 256796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara} 256896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 25699ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 25706ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner// Top level Expr::Evaluate method. 2571f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 2572f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 257356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallstatic bool Evaluate(EvalInfo &Info, const Expr *E) { 2574efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (E->getType()->isVectorType()) { 2575efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateVector(E, Info.EvalResult.Val, Info)) 257659b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 2577575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor } else if (E->getType()->isIntegralOrEnumerationType()) { 25788cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (!IntExprEvaluator(Info, Info.EvalResult.Val).Visit(E)) 25796dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 258056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (Info.EvalResult.Val.isLValue() && 258156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall !IsGlobalLValue(Info.EvalResult.Val.getLValueBase())) 25820f2b692bb10be35fdc60d0a72a847bdd73124670John McCall return false; 2583efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->hasPointerRepresentation()) { 2584efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 2585efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(E, LV, Info)) 25866dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 2587e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (!IsGlobalLValue(LV.Base)) 258842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 2589efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Info.EvalResult.Val); 2590efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isRealFloatingType()) { 2591efdb83e26f9a1fd2566afe54461216cd84814d42John McCall llvm::APFloat F(0.0); 2592efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateFloat(E, F, Info)) 25936dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 25941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2595efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Info.EvalResult.Val = APValue(F); 2596efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isAnyComplexType()) { 2597efdb83e26f9a1fd2566afe54461216cd84814d42John McCall ComplexValue C; 2598efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateComplex(E, C, Info)) 2599660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 2600efdb83e26f9a1fd2566afe54461216cd84814d42John McCall C.moveInto(Info.EvalResult.Val); 2601660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else 2602660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 2603660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 2604660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return true; 2605660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump} 2606660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 260756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall/// Evaluate - Return true if this is a constant which we can fold using 260856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall/// any crazy technique (that has nothing to do with language standards) that 260956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall/// we want to. If this function returns true, it returns the folded constant 261056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall/// in Result. 261156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallbool Expr::Evaluate(EvalResult &Result, const ASTContext &Ctx) const { 261256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall EvalInfo Info(Ctx, Result); 261356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall return ::Evaluate(Info, this); 261456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall} 261556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 26164ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::EvaluateAsBooleanCondition(bool &Result, 26174ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad const ASTContext &Ctx) const { 2618cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalResult Scratch; 2619cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalInfo Info(Ctx, Scratch); 2620cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall 2621cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall return HandleConversionToBool(this, Result, Info); 2622cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall} 2623cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall 26244ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::EvaluateAsLValue(EvalResult &Result, const ASTContext &Ctx) const { 26251b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson EvalInfo Info(Ctx, Result); 26261b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 2627efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 262842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (EvaluateLValue(this, LV, Info) && 262942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall !Result.HasSideEffects && 2630e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara IsGlobalLValue(LV.Base)) { 2631e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara LV.moveInto(Result.Val); 2632e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return true; 2633e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara } 2634e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return false; 2635e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara} 2636e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 26374ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::EvaluateAsAnyLValue(EvalResult &Result, 26384ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad const ASTContext &Ctx) const { 2639e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara EvalInfo Info(Ctx, Result); 2640e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2641e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara LValue LV; 2642e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (EvaluateLValue(this, LV, Info)) { 2643efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result.Val); 2644efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 2645efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 2646efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 2647b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman} 2648b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 26496ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// isEvaluatable - Call Evaluate to see if this expression can be constant 265045b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner/// folded, but discard the result. 26514ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::isEvaluatable(const ASTContext &Ctx) const { 26524fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson EvalResult Result; 26534fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects; 265445b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner} 265551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 26564ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::HasSideEffects(const ASTContext &Ctx) const { 2657393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian Expr::EvalResult Result; 2658393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian EvalInfo Info(Ctx, Result); 26598cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return HasSideEffect(Info).Visit(this); 2660393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian} 2661393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian 26624ba2a17694148e16eaa8d3917f657ffcd3667be4Jay FoadAPSInt Expr::EvaluateAsInt(const ASTContext &Ctx) const { 26631c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 26641c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson bool Result = Evaluate(EvalResult, Ctx); 2665c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)Result; 266651fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson assert(Result && "Could not evaluate expression"); 26671c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(EvalResult.Val.isInt() && "Expression did not evaluate to integer"); 266851fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 26691c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson return EvalResult.Val.getInt(); 267051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson} 2671d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2672e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara bool Expr::EvalResult::isGlobalLValue() const { 2673e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara assert(Val.isLValue()); 2674e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return IsGlobalLValue(Val.getLValueBase()); 2675e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara } 2676e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2677e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2678d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// isIntegerConstantExpr - this recursive routine will test if an expression is 2679d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// an integer constant expression. 2680d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2681d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Pass up a reason why! Invalid operation in i-c-e, division by zero, 2682d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// comma, etc 2683d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// 2684d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Handle offsetof. Two things to do: Handle GCC's __builtin_offsetof 2685d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// to support gcc 4.0+ and handle the idiom GCC recognizes with a null pointer 2686d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// cast+dereference. 2687d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2688d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// CheckICE - This function does the fundamental ICE checking: the returned 2689d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// ICEDiag contains a Val of 0, 1, or 2, and a possibly null SourceLocation. 2690d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Note that to reduce code duplication, this helper does no evaluation 2691d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// itself; the caller checks whether the expression is evaluatable, and 2692d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// in the rare cases where CheckICE actually cares about the evaluated 2693d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// value, it calls into Evalute. 2694d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 2695d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Meanings of Val: 2696d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 0: This expression is an ICE if it can be evaluated by Evaluate. 2697d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 1: This expression is not an ICE, but if it isn't evaluated, it's 2698d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// a legal subexpression for an ICE. This return value is used to handle 2699d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// the comma operator in C99 mode. 2700d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 2: This expression is not an ICE, and is not a legal subexpression for one. 2701d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 27023c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 27033c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 2704d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstruct ICEDiag { 2705d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall unsigned Val; 2706d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall SourceLocation Loc; 2707d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2708d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall public: 2709d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag(unsigned v, SourceLocation l) : Val(v), Loc(l) {} 2710d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag() : Val(0) {} 2711d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall}; 2712d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 27133c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 27143c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 27153c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmanstatic ICEDiag NoDiag() { return ICEDiag(); } 2716d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2717d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckEvalInICE(const Expr* E, ASTContext &Ctx) { 2718d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 2719d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!E->Evaluate(EVResult, Ctx) || EVResult.HasSideEffects || 2720d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 2721d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2722d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2723d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2724d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 2725d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2726d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckICE(const Expr* E, ASTContext &Ctx) { 2727d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(!E->isValueDependent() && "Should not see value dependent exprs!"); 27282ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!E->getType()->isIntegralOrEnumerationType()) { 2729d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2730d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2731d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2732d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (E->getStmtClass()) { 273363c00d7f35fa060c0a446c9df3a4402d9c7757feJohn McCall#define ABSTRACT_STMT(Node) 2734d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define STMT(Node, Base) case Expr::Node##Class: 2735d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define EXPR(Node, Base) 2736d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#include "clang/AST/StmtNodes.inc" 2737d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::PredefinedExprClass: 2738d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::FloatingLiteralClass: 2739d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImaginaryLiteralClass: 2740d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StringLiteralClass: 2741d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ArraySubscriptExprClass: 2742d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::MemberExprClass: 2743d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundAssignOperatorClass: 2744d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundLiteralExprClass: 2745d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ExtVectorElementExprClass: 2746d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::InitListExprClass: 2747d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DesignatedInitExprClass: 2748d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitValueInitExprClass: 2749d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenListExprClass: 2750d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::VAArgExprClass: 2751d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::AddrLabelExprClass: 2752d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StmtExprClass: 2753d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXMemberCallExprClass: 2754e08ce650a2b02410eddd1f60a4aa6b3d4be71e73Peter Collingbourne case Expr::CUDAKernelCallExprClass: 2755d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDynamicCastExprClass: 2756d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTypeidExprClass: 27579be88403e965cc49af76c9d33d818781d44b333eFrancois Pichet case Expr::CXXUuidofExprClass: 2758d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNullPtrLiteralExprClass: 2759d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThisExprClass: 2760d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThrowExprClass: 2761d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNewExprClass: 2762d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDeleteExprClass: 2763d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXPseudoDestructorExprClass: 2764d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedLookupExprClass: 2765d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DependentScopeDeclRefExprClass: 2766d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXConstructExprClass: 2767d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBindTemporaryExprClass: 27684765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall case Expr::ExprWithCleanupsClass: 2769d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTemporaryObjectExprClass: 2770d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXUnresolvedConstructExprClass: 2771d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDependentScopeMemberExprClass: 2772d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedMemberExprClass: 2773d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCStringLiteralClass: 2774d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCEncodeExprClass: 2775d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCMessageExprClass: 2776d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCSelectorExprClass: 2777d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCProtocolExprClass: 2778d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIvarRefExprClass: 2779d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCPropertyRefExprClass: 2780d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIsaExprClass: 2781d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ShuffleVectorExprClass: 2782d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockExprClass: 2783d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockDeclRefExprClass: 2784d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::NoStmtClass: 27857cd7d1ad33fdf49eef83942e8855fe20d95aa1b9John McCall case Expr::OpaqueValueExprClass: 2786be230c36e32142cbdcdbe9c97511d097beeecbabDouglas Gregor case Expr::PackExpansionExprClass: 2787c7793c73ba8a343de3f2552d984851985a46f159Douglas Gregor case Expr::SubstNonTypeTemplateParmPackExprClass: 278861eee0ca33b29e102f11bab77c8b74cc00e2392bTanya Lattner case Expr::AsTypeExprClass: 2789f85e193739c953358c865005855253af4f68a497John McCall case Expr::ObjCIndirectCopyRestoreExprClass: 279003e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor case Expr::MaterializeTemporaryExprClass: 2791d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2792d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2793ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor case Expr::SizeOfPackExprClass: 2794d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::GNUNullExprClass: 2795d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // GCC considers the GNU __null value to be an integral constant expression. 2796d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2797d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2798d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenExprClass: 2799d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ParenExpr>(E)->getSubExpr(), Ctx); 2800f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne case Expr::GenericSelectionExprClass: 2801f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne return CheckICE(cast<GenericSelectionExpr>(E)->getResultExpr(), Ctx); 2802d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::IntegerLiteralClass: 2803d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CharacterLiteralClass: 2804d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBoolLiteralExprClass: 2805ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor case Expr::CXXScalarValueInitExprClass: 2806d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryTypeTraitExprClass: 28076ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet case Expr::BinaryTypeTraitExprClass: 280821ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley case Expr::ArrayTypeTraitExprClass: 2809552622067dc45013d240f73952fece703f5e63bdJohn Wiegley case Expr::ExpressionTraitExprClass: 28102e156225a29407a50dd19041aa5750171ad44ea3Sebastian Redl case Expr::CXXNoexceptExprClass: 2811d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2812d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CallExprClass: 28136cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt case Expr::CXXOperatorCallExprClass: { 2814d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const CallExpr *CE = cast<CallExpr>(E); 2815d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CE->isBuiltinCall(Ctx)) 2816d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 2817d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2818d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2819d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DeclRefExprClass: 2820d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<EnumConstantDecl>(cast<DeclRefExpr>(E)->getDecl())) 2821d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2822d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Ctx.getLangOptions().CPlusPlus && 2823d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall E->getType().getCVRQualifiers() == Qualifiers::Const) { 2824d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl(); 2825d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2826d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Parameter variables are never constants. Without this check, 2827d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // getAnyInitializer() can find a default argument, which leads 2828d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to chaos. 2829d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<ParmVarDecl>(D)) 2830d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2831d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2832d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C++ 7.1.5.1p2 2833d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // A variable of non-volatile const-qualified integral or enumeration 2834d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // type initialized by an ICE can be used in ICEs. 2835d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const VarDecl *Dcl = dyn_cast<VarDecl>(D)) { 2836d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Qualifiers Quals = Ctx.getCanonicalType(Dcl->getType()).getQualifiers(); 2837d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Quals.hasVolatile() || !Quals.hasConst()) 2838d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2839d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2840d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Look for a declaration of this variable that has an initializer. 2841d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const VarDecl *ID = 0; 2842d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const Expr *Init = Dcl->getAnyInitializer(ID); 2843d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Init) { 2844d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (ID->isInitKnownICE()) { 2845d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // We have already checked whether this subexpression is an 2846d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // integral constant expression. 2847d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (ID->isInitICE()) 2848d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2849d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall else 2850d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2851d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2852d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2853d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // It's an ICE whether or not the definition we found is 2854d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // out-of-line. See DR 721 and the discussion in Clang PR 2855d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // 6206 for details. 2856d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2857d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Dcl->isCheckingICE()) { 2858d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2859d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2860d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2861d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Dcl->setCheckingICE(); 2862d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag Result = CheckICE(Init, Ctx); 2863d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Cache the result of the ICE test. 2864d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Dcl->setInitKnownICE(Result.Val == 0); 2865d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return Result; 2866d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2867d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2868d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2869d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2870d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryOperatorClass: { 2871d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const UnaryOperator *Exp = cast<UnaryOperator>(E); 2872d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 28732de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PostInc: 28742de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PostDec: 28752de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PreInc: 28762de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PreDec: 28772de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_AddrOf: 28782de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Deref: 2879d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 28802de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: 28812de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_LNot: 28822de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 28832de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 28842de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 28852de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Real: 28862de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Imag: 2887d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(Exp->getSubExpr(), Ctx); 2888d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2889d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2890d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // OffsetOf falls through here. 2891d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2892d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::OffsetOfExprClass: { 2893d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that per C99, offsetof must be an ICE. And AFAIK, using 2894d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Evaluate matches the proposed gcc behavior for cases like 2895d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // "offsetof(struct s{int x[4];}, x[!.0])". This doesn't affect 2896d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // compliance: we should warn earlier for offsetof expressions with 2897d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // array subscripts that aren't ICEs, and if the array subscripts 2898d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // are ICEs, the value of the offsetof must be an integer constant. 2899d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 2900d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2901f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case Expr::UnaryExprOrTypeTraitExprClass: { 2902f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne const UnaryExprOrTypeTraitExpr *Exp = cast<UnaryExprOrTypeTraitExpr>(E); 2903f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if ((Exp->getKind() == UETT_SizeOf) && 2904f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Exp->getTypeOfArgument()->isVariableArrayType()) 2905d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2906d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2907d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2908d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BinaryOperatorClass: { 2909d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const BinaryOperator *Exp = cast<BinaryOperator>(E); 2910d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 29112de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_PtrMemD: 29122de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_PtrMemI: 29132de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Assign: 29142de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_MulAssign: 29152de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_DivAssign: 29162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_RemAssign: 29172de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AddAssign: 29182de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_SubAssign: 29192de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShlAssign: 29202de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShrAssign: 29212de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AndAssign: 29222de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_XorAssign: 29232de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_OrAssign: 2924d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2925d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 29262de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 29272de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 29282de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Rem: 29292de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 29302de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 29312de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shl: 29322de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shr: 29332de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: 29342de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: 29352de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: 29362de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: 29372de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: 29382de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: 29392de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_And: 29402de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Xor: 29412de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Or: 29422de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Comma: { 2943d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 2944d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 29452de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Exp->getOpcode() == BO_Div || 29462de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall Exp->getOpcode() == BO_Rem) { 2947d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Evaluate gives an error for undefined Div/Rem, so make sure 2948d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // we don't evaluate one. 29493b332ab132fa85c83833d74d400f6e126f52fbd2John McCall if (LHSResult.Val == 0 && RHSResult.Val == 0) { 2950d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm::APSInt REval = Exp->getRHS()->EvaluateAsInt(Ctx); 2951d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval == 0) 2952d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2953d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval.isSigned() && REval.isAllOnesValue()) { 2954d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm::APSInt LEval = Exp->getLHS()->EvaluateAsInt(Ctx); 2955d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LEval.isMinSignedValue()) 2956d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2957d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2958d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2959d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 29602de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Exp->getOpcode() == BO_Comma) { 2961d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Ctx.getLangOptions().C99) { 2962d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C99 6.6p3 introduces a strange edge case: comma can be in an ICE 2963d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // if it isn't evaluated. 2964d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 0) 2965d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2966d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } else { 2967d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // In both C89 and C++, commas in ICEs are illegal. 2968d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2969d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2970d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2971d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 2972d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 2973d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 2974d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 29752de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LAnd: 29762de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LOr: { 2977d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 297863fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 297963fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // C++0x [expr.const]p2: 298063fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // [...] subexpressions of logical AND (5.14), logical OR 298163fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // (5.15), and condi- tional (5.16) operations that are not 298263fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // evaluated are not considered. 298363fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor if (Ctx.getLangOptions().CPlusPlus0x && LHSResult.Val == 0) { 298463fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor if (Exp->getOpcode() == BO_LAnd && 298563fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor Exp->getLHS()->EvaluateAsInt(Ctx) == 0) 298663fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor return LHSResult; 298763fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 298863fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor if (Exp->getOpcode() == BO_LOr && 298963fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor Exp->getLHS()->EvaluateAsInt(Ctx) != 0) 299063fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor return LHSResult; 299163fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor } 299263fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 2993d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 2994d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 1) { 2995d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the RHS has a comma "side-effect"; we need 2996d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to actually check the condition to see whether the side 2997d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // with the comma is evaluated. 29982de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if ((Exp->getOpcode() == BO_LAnd) != 2999d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall (Exp->getLHS()->EvaluateAsInt(Ctx) == 0)) 3000d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 3001d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 3002d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3003d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 3004d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 3005d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 3006d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 3007d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3008d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3009d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3010d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitCastExprClass: 3011d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CStyleCastExprClass: 3012d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXFunctionalCastExprClass: 3013d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXStaticCastExprClass: 3014d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXReinterpretCastExprClass: 3015f85e193739c953358c865005855253af4f68a497John McCall case Expr::CXXConstCastExprClass: 3016f85e193739c953358c865005855253af4f68a497John McCall case Expr::ObjCBridgedCastExprClass: { 3017d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const Expr *SubExpr = cast<CastExpr>(E)->getSubExpr(); 30182ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (SubExpr->getType()->isIntegralOrEnumerationType()) 3019d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(SubExpr, Ctx); 3020d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<FloatingLiteral>(SubExpr->IgnoreParens())) 3021d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 3022d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 3023d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 302456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Expr::BinaryConditionalOperatorClass: { 302556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall const BinaryConditionalOperator *Exp = cast<BinaryConditionalOperator>(E); 302656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall ICEDiag CommonResult = CheckICE(Exp->getCommon(), Ctx); 302756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (CommonResult.Val == 2) return CommonResult; 302856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall ICEDiag FalseResult = CheckICE(Exp->getFalseExpr(), Ctx); 302956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (FalseResult.Val == 2) return FalseResult; 303056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (CommonResult.Val == 1) return CommonResult; 303156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (FalseResult.Val == 1 && 303256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Exp->getCommon()->EvaluateAsInt(Ctx) == 0) return NoDiag(); 303356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall return FalseResult; 303456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 3035d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ConditionalOperatorClass: { 3036d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const ConditionalOperator *Exp = cast<ConditionalOperator>(E); 3037d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // If the condition (ignoring parens) is a __builtin_constant_p call, 3038d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // then only the true side is actually considered in an integer constant 3039d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // expression, and it is fully evaluated. This is an important GNU 3040d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // extension. See GCC PR38377 for discussion. 3041d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const CallExpr *CallCE 3042d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall = dyn_cast<CallExpr>(Exp->getCond()->IgnoreParenCasts())) 3043d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CallCE->isBuiltinCall(Ctx) == Builtin::BI__builtin_constant_p) { 3044d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 3045d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!E->Evaluate(EVResult, Ctx) || EVResult.HasSideEffects || 3046d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 3047d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 3048d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3049d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 3050d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3051d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag CondResult = CheckICE(Exp->getCond(), Ctx); 3052d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 2) 3053d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 305463fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 305563fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // C++0x [expr.const]p2: 305663fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // subexpressions of [...] conditional (5.16) operations that 305763fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // are not evaluated are not considered 305863fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor bool TrueBranch = Ctx.getLangOptions().CPlusPlus0x 305963fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor ? Exp->getCond()->EvaluateAsInt(Ctx) != 0 306063fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor : false; 306163fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor ICEDiag TrueResult = NoDiag(); 306263fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor if (!Ctx.getLangOptions().CPlusPlus0x || TrueBranch) 306363fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor TrueResult = CheckICE(Exp->getTrueExpr(), Ctx); 306463fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor ICEDiag FalseResult = NoDiag(); 306563fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor if (!Ctx.getLangOptions().CPlusPlus0x || !TrueBranch) 306663fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor FalseResult = CheckICE(Exp->getFalseExpr(), Ctx); 306763fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 3068d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 2) 3069d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 3070d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (FalseResult.Val == 2) 3071d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 3072d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 1) 3073d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 3074d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 0 && FalseResult.Val == 0) 3075d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 3076d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the diagnostics depend on which side is evaluated 3077d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that if we get here, CondResult is 0, and at least one of 3078d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // TrueResult and FalseResult is non-zero. 3079d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Exp->getCond()->EvaluateAsInt(Ctx) == 0) { 3080d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 3081d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3082d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 3083d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3084d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDefaultArgExprClass: 3085d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<CXXDefaultArgExpr>(E)->getExpr(), Ctx); 3086d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ChooseExprClass: { 3087d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ChooseExpr>(E)->getChosenSubExpr(Ctx), Ctx); 3088d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3089d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3090d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 3091d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Silence a GCC warning 3092d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 3093d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 3094d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 3095d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallbool Expr::isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 3096d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall SourceLocation *Loc, bool isEvaluated) const { 3097d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag d = CheckICE(this, Ctx); 3098d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (d.Val != 0) { 3099d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Loc) *Loc = d.Loc; 3100d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return false; 3101d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3102d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall EvalResult EvalResult; 3103d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!Evaluate(EvalResult, Ctx)) 3104d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm_unreachable("ICE cannot be evaluated!"); 3105d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(!EvalResult.HasSideEffects && "ICE with side effects!"); 3106d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(EvalResult.Val.isInt() && "ICE that isn't integer!"); 3107d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Result = EvalResult.Val.getInt(); 3108d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return true; 3109d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 3110