ExprConstant.cpp revision 8327fad71da34492d82c532f42a58cb4baff81a3
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 491e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith /// EvalStatus - Contains information about the evaluation. 501e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith Expr::EvalStatus &EvalStatus; 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 601e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith EvalInfo(const ASTContext &C, Expr::EvalStatus &S) 611e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith : Ctx(C), EvalStatus(S) {} 62f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith 63f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith const LangOptions &getLangOpts() { return Ctx.getLangOptions(); } 64c54061a679d8db4169438b2f97f81e3f443c6a25Benjamin Kramer }; 6587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 66f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall struct ComplexValue { 67f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall private: 68f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool IsInt; 69f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 70f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall public: 71f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt IntReal, IntImag; 72f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat FloatReal, FloatImag; 73f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 74f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue() : FloatReal(APFloat::Bogus), FloatImag(APFloat::Bogus) {} 75f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 76f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall void makeComplexFloat() { IsInt = false; } 77f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool isComplexFloat() const { return !IsInt; } 78f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat &getComplexFloatReal() { return FloatReal; } 79f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat &getComplexFloatImag() { return FloatImag; } 80f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 81f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall void makeComplexInt() { IsInt = true; } 82f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool isComplexInt() const { return IsInt; } 83f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt &getComplexIntReal() { return IntReal; } 84f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt &getComplexIntImag() { return IntImag; } 85f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 8656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall void moveInto(APValue &v) const { 87f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (isComplexFloat()) 88f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall v = APValue(FloatReal, FloatImag); 89f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall else 90f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall v = APValue(IntReal, IntImag); 91f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall } 9256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall void setFrom(const APValue &v) { 9356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall assert(v.isComplexFloat() || v.isComplexInt()); 9456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (v.isComplexFloat()) { 9556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall makeComplexFloat(); 9656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall FloatReal = v.getComplexFloatReal(); 9756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall FloatImag = v.getComplexFloatImag(); 9856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } else { 9956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall makeComplexInt(); 10056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall IntReal = v.getComplexIntReal(); 10156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall IntImag = v.getComplexIntImag(); 10256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 10356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 104f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall }; 105efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 106efdb83e26f9a1fd2566afe54461216cd84814d42John McCall struct LValue { 1078cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr *Base; 108efdb83e26f9a1fd2566afe54461216cd84814d42John McCall CharUnits Offset; 109efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 1108cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr *getLValueBase() { return Base; } 111efdb83e26f9a1fd2566afe54461216cd84814d42John McCall CharUnits getLValueOffset() { return Offset; } 112efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 11356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall void moveInto(APValue &v) const { 114efdb83e26f9a1fd2566afe54461216cd84814d42John McCall v = APValue(Base, Offset); 115efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 11656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall void setFrom(const APValue &v) { 11756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall assert(v.isLValue()); 11856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Base = v.getLValueBase(); 11956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Offset = v.getLValueOffset(); 12056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 121efdb83e26f9a1fd2566afe54461216cd84814d42John McCall }; 122f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall} 12387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 1241e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smithstatic bool Evaluate(APValue &Result, EvalInfo &Info, const Expr *E); 125efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluateLValue(const Expr *E, LValue &Result, EvalInfo &Info); 126efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluatePointer(const Expr *E, LValue &Result, EvalInfo &Info); 12787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluateInteger(const Expr *E, APSInt &Result, EvalInfo &Info); 128d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattnerstatic bool EvaluateIntegerOrLValue(const Expr *E, APValue &Result, 129d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner EvalInfo &Info); 130d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr *E, APFloat &Result, EvalInfo &Info); 131f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallstatic bool EvaluateComplex(const Expr *E, ComplexValue &Res, EvalInfo &Info); 132f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 133f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// Misc utilities 1354efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 1364efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 137e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnarastatic bool IsGlobalLValue(const Expr* E) { 13842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!E) return true; 13942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 14042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 14142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (isa<FunctionDecl>(DRE->getDecl())) 14242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 14342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) 14442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return VD->hasGlobalStorage(); 14542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 14642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } 14742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 14842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(E)) 14942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return CLE->isFileScope(); 15042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 15142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 15242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 15342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 154efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvalPointerValueAsBool(LValue& Value, bool& Result) { 155efdb83e26f9a1fd2566afe54461216cd84814d42John McCall const Expr* Base = Value.Base; 156a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1573554283157190e67918fad4221a5e6faf9317362John McCall // A null base expression indicates a null pointer. These are always 1583554283157190e67918fad4221a5e6faf9317362John McCall // evaluatable, and they are false unless the offset is zero. 1593554283157190e67918fad4221a5e6faf9317362John McCall if (!Base) { 1603554283157190e67918fad4221a5e6faf9317362John McCall Result = !Value.Offset.isZero(); 1613554283157190e67918fad4221a5e6faf9317362John McCall return true; 1623554283157190e67918fad4221a5e6faf9317362John McCall } 1633554283157190e67918fad4221a5e6faf9317362John McCall 16442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // Require the base expression to be a global l-value. 165e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (!IsGlobalLValue(Base)) return false; 16642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 1673554283157190e67918fad4221a5e6faf9317362John McCall // We have a non-null base expression. These are generally known to 1683554283157190e67918fad4221a5e6faf9317362John McCall // be true, but if it'a decl-ref to a weak symbol it can be null at 1693554283157190e67918fad4221a5e6faf9317362John McCall // runtime. 1703554283157190e67918fad4221a5e6faf9317362John McCall Result = true; 171a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1723554283157190e67918fad4221a5e6faf9317362John McCall const DeclRefExpr* DeclRef = dyn_cast<DeclRefExpr>(Base); 173a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola if (!DeclRef) 174a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola return true; 175a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1763554283157190e67918fad4221a5e6faf9317362John McCall // If it's a weak symbol, it isn't constant-evaluable. 177a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola const ValueDecl* Decl = DeclRef->getDecl(); 178a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola if (Decl->hasAttr<WeakAttr>() || 179a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola Decl->hasAttr<WeakRefAttr>() || 1800a0d2b179085a52c10402feebeb6db8b4d96a140Douglas Gregor Decl->isWeakImported()) 181a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola return false; 182a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1835bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return true; 1845bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman} 1855bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman 186cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCallstatic bool HandleConversionToBool(const Expr* E, bool& Result, 187cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalInfo &Info) { 1882ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (E->getType()->isIntegralOrEnumerationType()) { 1894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 1904efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateInteger(E, IntResult, Info)) 1914efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1924efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = IntResult != 0; 1934efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 1944efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else if (E->getType()->isRealFloatingType()) { 1954efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APFloat FloatResult(0.0); 1964efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateFloat(E, FloatResult, Info)) 1974efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1984efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = !FloatResult.isZero(); 1994efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 200a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->hasPointerRepresentation()) { 201efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue PointerResult; 2024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluatePointer(E, PointerResult, Info)) 2034efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 2045bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return EvalPointerValueAsBool(PointerResult, Result); 205a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->isAnyComplexType()) { 206f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue ComplexResult; 207a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (!EvaluateComplex(E, ComplexResult, Info)) 208a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return false; 209a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (ComplexResult.isComplexFloat()) { 210a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = !ComplexResult.getComplexFloatReal().isZero() || 211a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman !ComplexResult.getComplexFloatImag().isZero(); 212a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else { 213a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = ComplexResult.getComplexIntReal().getBoolValue() || 214a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman ComplexResult.getComplexIntImag().getBoolValue(); 215a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } 216a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return true; 2174efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 2204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 2214efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleFloatToIntCast(QualType DestType, QualType SrcType, 2234ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad APFloat &Value, const ASTContext &Ctx) { 224a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 225a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Determine whether we are converting to unsigned or signed. 226575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor bool DestSigned = DestType->isSignedIntegerOrEnumerationType(); 2271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 228a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // FIXME: Warning for overflow. 2293e1ef7849845a9e7bf79156bbb8a2c26d77a1d2eJeffrey Yasskin APSInt Result(DestWidth, !DestSigned); 230a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 2313e1ef7849845a9e7bf79156bbb8a2c26d77a1d2eJeffrey Yasskin (void)Value.convertToInteger(Result, llvm::APFloat::rmTowardZero, &ignored); 2323e1ef7849845a9e7bf79156bbb8a2c26d77a1d2eJeffrey Yasskin return Result; 233a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 234a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 2351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleFloatToFloatCast(QualType DestType, QualType SrcType, 2364ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad APFloat &Value, const ASTContext &Ctx) { 237a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 238a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result = Value; 2391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.convert(Ctx.getFloatTypeSemantics(DestType), 240a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven, &ignored); 241a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 242a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 243a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 2441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleIntToIntCast(QualType DestType, QualType SrcType, 2454ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad APSInt &Value, const ASTContext &Ctx) { 246a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 247a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt Result = Value; 248a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Figure out if this is a truncate, extend or noop cast. 249a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // If the input is signed, do a sign extend, noop, or truncate. 2509f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Result = Result.extOrTrunc(DestWidth); 251575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor Result.setIsUnsigned(DestType->isUnsignedIntegerOrEnumerationType()); 252a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 253a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 254a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 2551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleIntToFloatCast(QualType DestType, QualType SrcType, 2564ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad APSInt &Value, const ASTContext &Ctx) { 257a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 258a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result(Ctx.getFloatTypeSemantics(DestType), 1); 259a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.convertFromAPInt(Value, Value.isSigned(), 260a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven); 261a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 262a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 263a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 26403f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith/// Try to evaluate the initializer for a variable declaration. 26503f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smithstatic APValue *EvaluateVarDeclInit(EvalInfo &Info, const VarDecl *VD) { 26603f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith if (isa<ParmVarDecl>(VD)) 26703f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith return 0; 26803f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 26903f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith const Expr *Init = VD->getAnyInitializer(); 27003f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith if (!Init) 27103f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith return 0; 27203f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 27303f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith if (APValue *V = VD->getEvaluatedValue()) 27403f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith return V; 27503f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 27603f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith if (VD->isEvaluatingValue()) 27703f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith return 0; 27803f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 27903f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith VD->setEvaluatingValue(); 28003f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 28103f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith // FIXME: If the initializer isn't a constant expression, propagate up any 28203f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith // diagnostic explaining why not. 28303f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith Expr::EvalResult EResult; 28403f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith if (Init->Evaluate(EResult, Info.Ctx) && !EResult.HasSideEffects) 28503f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith VD->setEvaluatedValue(EResult.Val); 28603f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith else 28703f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith VD->setEvaluatedValue(APValue()); 28803f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 28903f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith return VD->getEvaluatedValue(); 29003f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith} 29103f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 29203f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smithbool IsConstNonVolatile(QualType T) { 29303f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith Qualifiers Quals = T.getQualifiers(); 29403f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith return Quals.hasConst() && !Quals.hasVolatile(); 29503f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith} 29603f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith 297c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumpnamespace { 298770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass HasSideEffect 2998cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ConstStmtVisitor<HasSideEffect, bool> { 3001e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith const ASTContext &Ctx; 301c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumppublic: 302c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 3031e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith HasSideEffect(const ASTContext &C) : Ctx(C) {} 304c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 305c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // Unhandled nodes conservatively default to having side effects. 3068cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitStmt(const Stmt *S) { 307c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 308c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 309c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 3108cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitParenExpr(const ParenExpr *E) { return Visit(E->getSubExpr()); } 3118cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitGenericSelectionExpr(const GenericSelectionExpr *E) { 312f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne return Visit(E->getResultExpr()); 313f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne } 3148cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitDeclRefExpr(const DeclRefExpr *E) { 3151e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 316c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 317c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return false; 318c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 319f85e193739c953358c865005855253af4f68a497John McCall bool VisitObjCIvarRefExpr(const ObjCIvarRefExpr *E) { 3201e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 321f85e193739c953358c865005855253af4f68a497John McCall return true; 322f85e193739c953358c865005855253af4f68a497John McCall return false; 323f85e193739c953358c865005855253af4f68a497John McCall } 324f85e193739c953358c865005855253af4f68a497John McCall bool VisitBlockDeclRefExpr (const BlockDeclRefExpr *E) { 3251e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 326f85e193739c953358c865005855253af4f68a497John McCall return true; 327f85e193739c953358c865005855253af4f68a497John McCall return false; 328f85e193739c953358c865005855253af4f68a497John McCall } 329f85e193739c953358c865005855253af4f68a497John McCall 330c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // We don't want to evaluate BlockExprs multiple times, as they generate 331c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // a ton of code. 3328cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBlockExpr(const BlockExpr *E) { return true; } 3338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitPredefinedExpr(const PredefinedExpr *E) { return false; } 3348cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) 335c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump { return Visit(E->getInitializer()); } 3368cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitMemberExpr(const MemberExpr *E) { return Visit(E->getBase()); } 3378cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitIntegerLiteral(const IntegerLiteral *E) { return false; } 3388cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitFloatingLiteral(const FloatingLiteral *E) { return false; } 3398cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitStringLiteral(const StringLiteral *E) { return false; } 3408cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCharacterLiteral(const CharacterLiteral *E) { return false; } 3418cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *E) 342f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne { return false; } 3438cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitArraySubscriptExpr(const ArraySubscriptExpr *E) 344980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 3458cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitChooseExpr(const ChooseExpr *E) 3461e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith { return Visit(E->getChosenSubExpr(Ctx)); } 3478cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E) { return Visit(E->getSubExpr()); } 3488cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBinAssign(const BinaryOperator *E) { return true; } 3498cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCompoundAssignOperator(const BinaryOperator *E) { return true; } 3508cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBinaryOperator(const BinaryOperator *E) 351980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 3528cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPreInc(const UnaryOperator *E) { return true; } 3538cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPostInc(const UnaryOperator *E) { return true; } 3548cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPreDec(const UnaryOperator *E) { return true; } 3558cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryPostDec(const UnaryOperator *E) { return true; } 3568cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryDeref(const UnaryOperator *E) { 3571e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 358c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 359980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump return Visit(E->getSubExpr()); 360c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 3618cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryOperator(const UnaryOperator *E) { return Visit(E->getSubExpr()); } 362363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner 363363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner // Has side effects if any element does. 3648cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitInitListExpr(const InitListExpr *E) { 365363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner for (unsigned i = 0, e = E->getNumInits(); i != e; ++i) 366363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner if (Visit(E->getInit(i))) return true; 3678cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (const Expr *filler = E->getArrayFiller()) 3684423ac0282acb8ba801eb05b38712438dc0c1e3eArgyrios Kyrtzidis return Visit(filler); 369363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner return false; 370363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner } 371ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor 3728cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitSizeOfPackExpr(const SizeOfPackExpr *) { return false; } 373c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump}; 374c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 37556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallclass OpaqueValueEvaluation { 37656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall EvalInfo &info; 37756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall OpaqueValueExpr *opaqueValue; 37856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 37956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallpublic: 38056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall OpaqueValueEvaluation(EvalInfo &info, OpaqueValueExpr *opaqueValue, 38156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall Expr *value) 38256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall : info(info), opaqueValue(opaqueValue) { 38356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 38456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall // If evaluation fails, fail immediately. 3851e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (!Evaluate(info.OpaqueValues[opaqueValue], info, value)) { 38656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall this->opaqueValue = 0; 38756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall return; 38856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 38956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 39056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 39156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall bool hasError() const { return opaqueValue == 0; } 39256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 39356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall ~OpaqueValueEvaluation() { 3941e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith // FIXME: This will not work for recursive constexpr functions using opaque 3951e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith // values. Restore the former value. 39656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (opaqueValue) info.OpaqueValues.erase(opaqueValue); 39756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 39856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall}; 39956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 400c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump} // end anonymous namespace 401c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 4024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 4038cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne// Generic Evaluation 4048cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne//===----------------------------------------------------------------------===// 4058cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournenamespace { 4068cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4078cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournetemplate <class Derived, typename RetTy=void> 4088cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourneclass ExprEvaluatorBase 4098cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ConstStmtVisitor<Derived, RetTy> { 4108cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourneprivate: 4118cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy DerivedSuccess(const APValue &V, const Expr *E) { 4128cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return static_cast<Derived*>(this)->Success(V, E); 4138cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 4148cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy DerivedError(const Expr *E) { 4158cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return static_cast<Derived*>(this)->Error(E); 4168cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 417f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith RetTy DerivedValueInitialization(const Expr *E) { 418f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return static_cast<Derived*>(this)->ValueInitialization(E); 419f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 4208cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4218cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourneprotected: 4228cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne EvalInfo &Info; 4238cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne typedef ConstStmtVisitor<Derived, RetTy> StmtVisitorTy; 4248cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne typedef ExprEvaluatorBase ExprEvaluatorBaseTy; 4258cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 426f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith RetTy ValueInitialization(const Expr *E) { return DerivedError(E); } 427f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith 4288cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournepublic: 4298cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne ExprEvaluatorBase(EvalInfo &Info) : Info(Info) {} 4308cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4318cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitStmt(const Stmt *) { 432b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Expression evaluator should not be called on stmts"); 4338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 4348cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitExpr(const Expr *E) { 4358cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return DerivedError(E); 4368cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 4378cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4388cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitParenExpr(const ParenExpr *E) 4398cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getSubExpr()); } 4408cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitUnaryExtension(const UnaryOperator *E) 4418cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getSubExpr()); } 4428cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitUnaryPlus(const UnaryOperator *E) 4438cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getSubExpr()); } 4448cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitChooseExpr(const ChooseExpr *E) 4458cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getChosenSubExpr(Info.Ctx)); } 4468cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitGenericSelectionExpr(const GenericSelectionExpr *E) 4478cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne { return StmtVisitorTy::Visit(E->getResultExpr()); } 44891a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall RetTy VisitSubstNonTypeTemplateParmExpr(const SubstNonTypeTemplateParmExpr *E) 44991a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall { return StmtVisitorTy::Visit(E->getReplacement()); } 4508cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4518cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitBinaryConditionalOperator(const BinaryConditionalOperator *E) { 4528cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne OpaqueValueEvaluation opaque(Info, E->getOpaqueValue(), E->getCommon()); 4538cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (opaque.hasError()) 4548cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return DerivedError(E); 4558cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4568cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool cond; 4578cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (!HandleConversionToBool(E->getCond(), cond, Info)) 4588cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return DerivedError(E); 4598cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4608cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return StmtVisitorTy::Visit(cond ? E->getTrueExpr() : E->getFalseExpr()); 4618cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 4628cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4638cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitConditionalOperator(const ConditionalOperator *E) { 4648cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool BoolResult; 4658cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 4668cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return DerivedError(E); 4678cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4688cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 4698cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return StmtVisitorTy::Visit(EvalExpr); 4708cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 4718cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 4728cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne RetTy VisitOpaqueValueExpr(const OpaqueValueExpr *E) { 4738cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const APValue *value = Info.getOpaqueValue(E); 4748cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (!value) 4758cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return (E->getSourceExpr() ? StmtVisitorTy::Visit(E->getSourceExpr()) 4768cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : DerivedError(E)); 4778cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return DerivedSuccess(*value, E); 4788cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 479f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith 480f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith RetTy VisitInitListExpr(const InitListExpr *E) { 481f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith if (Info.getLangOpts().CPlusPlus0x) { 482f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith if (E->getNumInits() == 0) 483f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return DerivedValueInitialization(E); 484f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith if (E->getNumInits() == 1) 485f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return StmtVisitorTy::Visit(E->getInit(0)); 486f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 487f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return DerivedError(E); 488f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 489f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith RetTy VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { 490f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return DerivedValueInitialization(E); 491f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 492f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith RetTy VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E) { 493f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return DerivedValueInitialization(E); 494f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 495f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith 4968327fad71da34492d82c532f42a58cb4baff81a3Richard Smith /// Visit a value which is evaluated, but whose value is ignored. 4978327fad71da34492d82c532f42a58cb4baff81a3Richard Smith void VisitIgnoredValue(const Expr *E) { 4988327fad71da34492d82c532f42a58cb4baff81a3Richard Smith APValue Scratch; 4998327fad71da34492d82c532f42a58cb4baff81a3Richard Smith if (!Evaluate(Scratch, Info, E)) 5008327fad71da34492d82c532f42a58cb4baff81a3Richard Smith Info.EvalStatus.HasSideEffects = true; 5018327fad71da34492d82c532f42a58cb4baff81a3Richard Smith } 5028cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne}; 5038cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 5048cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne} 5058cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 5068cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne//===----------------------------------------------------------------------===// 5074efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// LValue Evaluation 5084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 5094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmannamespace { 510770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass LValueExprEvaluator 5118cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<LValueExprEvaluator, bool> { 512efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue &Result; 5130124839d7fb3d846795190ba2ccf3951f27784feChandler Carruth const Decl *PrevDecl; 514efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 5158cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const Expr *E) { 516efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = E; 517efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::Zero(); 518efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 519efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 5204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanpublic: 5211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 522efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValueExprEvaluator(EvalInfo &info, LValue &Result) : 5230124839d7fb3d846795190ba2ccf3951f27784feChandler Carruth ExprEvaluatorBaseTy(info), Result(Result), PrevDecl(0) {} 5244efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5258cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const APValue &V, const Expr *E) { 5268cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result.setFrom(V); 5278cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 5288cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 5298cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Error(const Expr *E) { 530efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 5314efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 5328ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 5338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitDeclRefExpr(const DeclRefExpr *E); 5348cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitPredefinedExpr(const PredefinedExpr *E) { return Success(E); } 5358cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 5368cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitMemberExpr(const MemberExpr *E); 5378cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitStringLiteral(const StringLiteral *E) { return Success(E); } 5388cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitObjCEncodeExpr(const ObjCEncodeExpr *E) { return Success(E); } 5398cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitArraySubscriptExpr(const ArraySubscriptExpr *E); 5408cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitUnaryDeref(const UnaryOperator *E); 5418cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 5428cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E) { 54326bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson switch (E->getCastKind()) { 54426bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson default: 545efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 54626bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson 5472de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_NoOp: 548db924224b51b153f24fbe492102d4edebcbbb7f4Eli Friedman case CK_LValueBitCast: 54926bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson return Visit(E->getSubExpr()); 550db924224b51b153f24fbe492102d4edebcbbb7f4Eli Friedman 551db924224b51b153f24fbe492102d4edebcbbb7f4Eli Friedman // FIXME: Support CK_DerivedToBase and friends. 55226bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 55326bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 554cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl 555ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: __real__, __imag__ 5568cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 5574efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman}; 5584efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} // end anonymous namespace 5594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 560efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluateLValue(const Expr* E, LValue& Result, EvalInfo &Info) { 5618cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return LValueExprEvaluator(Info, Result).Visit(E); 5624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 5634efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5648cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitDeclRefExpr(const DeclRefExpr *E) { 56550c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (isa<FunctionDecl>(E->getDecl())) { 566efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 5678cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } else if (const VarDecl* VD = dyn_cast<VarDecl>(E->getDecl())) { 56850c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (!VD->getType()->isReferenceType()) 569efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 570761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth // Reference parameters can refer to anything even if they have an 571761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth // "initializer" in the form of a default argument. 5720124839d7fb3d846795190ba2ccf3951f27784feChandler Carruth if (!isa<ParmVarDecl>(VD)) { 5738cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne // FIXME: Check whether VD might be overridden! 5740124839d7fb3d846795190ba2ccf3951f27784feChandler Carruth 5750124839d7fb3d846795190ba2ccf3951f27784feChandler Carruth // Check for recursive initializers of references. 5760124839d7fb3d846795190ba2ccf3951f27784feChandler Carruth if (PrevDecl == VD) 5770124839d7fb3d846795190ba2ccf3951f27784feChandler Carruth return Error(E); 5780124839d7fb3d846795190ba2ccf3951f27784feChandler Carruth PrevDecl = VD; 5798cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (const Expr *Init = VD->getAnyInitializer()) 5808cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Visit(Init); 5810124839d7fb3d846795190ba2ccf3951f27784feChandler Carruth } 58250c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } 58350c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman 5848cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitDeclRefExpr(E); 58535873c49adad211ff466e34342a52665742794f5Anders Carlsson} 58635873c49adad211ff466e34342a52665742794f5Anders Carlsson 5878cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool 5888cad3046be06ea73ff8892d947697a21d7a440d3Peter CollingbourneLValueExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 589efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 5904efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 5914efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5928cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitMemberExpr(const MemberExpr *E) { 5934efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman QualType Ty; 5944efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->isArrow()) { 595efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(E->getBase(), Result, Info)) 596efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 5976217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek Ty = E->getBase()->getType()->getAs<PointerType>()->getPointeeType(); 5984efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else { 599efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!Visit(E->getBase())) 600efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6014efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Ty = E->getBase()->getType(); 6024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 6034efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 6048cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const RecordDecl *RD = Ty->getAs<RecordType>()->getDecl(); 6054efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 60686f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 6078cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const FieldDecl *FD = dyn_cast<FieldDecl>(E->getMemberDecl()); 60886f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (!FD) // FIXME: deal with other kinds of member expressions 609efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6102be586108bb401019647791feca19ea03fd477ceEli Friedman 6112be586108bb401019647791feca19ea03fd477ceEli Friedman if (FD->getType()->isReferenceType()) 612efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6132be586108bb401019647791feca19ea03fd477ceEli Friedman 61482905749d5c8d8b4edec11de754a73349cb96603Eli Friedman unsigned i = FD->getFieldIndex(); 615fb1e3bc29b667f4275e1d5a43d64ec173f4f9a7dKen Dyck Result.Offset += Info.Ctx.toCharUnitsFromBits(RL.getFieldOffset(i)); 616efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 6174efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 6184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 6198cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitArraySubscriptExpr(const ArraySubscriptExpr *E) { 6203068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getBase(), Result, Info)) 621efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 6233068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APSInt Index; 6243068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluateInteger(E->getIdx(), Index, Info)) 625efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6263068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 627199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck CharUnits ElementSize = Info.Ctx.getTypeSizeInChars(E->getType()); 628efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset += Index.getSExtValue() * ElementSize; 629efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 6303068d117951a8df54bae9db039b56201ab10962bAnders Carlsson} 6314efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 6328cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool LValueExprEvaluator::VisitUnaryDeref(const UnaryOperator *E) { 633efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluatePointer(E->getSubExpr(), Result, Info); 634e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman} 635e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman 6364efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 637f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Pointer Evaluation 638f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 639f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 640c754aa62643e66ab967ca32ae8b0b3fc419bba25Anders Carlssonnamespace { 641770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass PointerExprEvaluator 6428cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<PointerExprEvaluator, bool> { 643efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue &Result; 644efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 6458cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const Expr *E) { 646efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = E; 647efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::Zero(); 648efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 649efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 6502bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonpublic: 6511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 652efdb83e26f9a1fd2566afe54461216cd84814d42John McCall PointerExprEvaluator(EvalInfo &info, LValue &Result) 6538cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(Result) {} 654f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 6558cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const APValue &V, const Expr *E) { 6568cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result.setFrom(V); 6578cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 6582bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 6598cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Error(const Stmt *S) { 6608cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return false; 661f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne } 662f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith bool ValueInitialization(const Expr *E) { 663f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return Success((Expr*)0); 664f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 6652bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 666efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitBinaryOperator(const BinaryOperator *E); 6678cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr* E); 668efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitUnaryAddrOf(const UnaryOperator *E); 6698cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitObjCStringLiteral(const ObjCStringLiteral *E) 670efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success(E); } 6718cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitAddrLabelExpr(const AddrLabelExpr *E) 672efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success(E); } 6738cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCallExpr(const CallExpr *E); 6748cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitBlockExpr(const BlockExpr *E) { 675469a1eb996e1cb0be54f9b210f836afbddcbb2ccJohn McCall if (!E->getBlockDecl()->hasCaptures()) 676efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 677efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 678b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump } 6798cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *E) 680f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith { return ValueInitialization(E); } 68156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 682ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: @protocol, @selector 6832bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson}; 684f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 6852bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 686efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluatePointer(const Expr* E, LValue& Result, EvalInfo &Info) { 6877db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall assert(E->getType()->hasPointerRepresentation()); 6888cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return PointerExprEvaluator(Info, Result).Visit(E); 689f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 690650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 691efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 6922de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() != BO_Add && 6932de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall E->getOpcode() != BO_Sub) 694efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 696650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *PExp = E->getLHS(); 697650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *IExp = E->getRHS(); 698650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (IExp->getType()->isPointerType()) 699f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner std::swap(PExp, IExp); 7001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 701efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(PExp, Result, Info)) 702efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 7031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 704efdb83e26f9a1fd2566afe54461216cd84814d42John McCall llvm::APSInt Offset; 705efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateInteger(IExp, Offset, Info)) 706efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 707efdb83e26f9a1fd2566afe54461216cd84814d42John McCall int64_t AdditionalOffset 708efdb83e26f9a1fd2566afe54461216cd84814d42John McCall = Offset.isSigned() ? Offset.getSExtValue() 709efdb83e26f9a1fd2566afe54461216cd84814d42John McCall : static_cast<int64_t>(Offset.getZExtValue()); 710650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 711e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar // Compute the new offset in the appropriate width. 712e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar 713e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar QualType PointeeType = 714e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar PExp->getType()->getAs<PointerType>()->getPointeeType(); 715efdb83e26f9a1fd2566afe54461216cd84814d42John McCall CharUnits SizeOfPointee; 7161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7174d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson // Explicitly handle GNU void* and function pointer arithmetic extensions. 7184d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson if (PointeeType->isVoidType() || PointeeType->isFunctionType()) 719efdb83e26f9a1fd2566afe54461216cd84814d42John McCall SizeOfPointee = CharUnits::One(); 7204d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson else 721efdb83e26f9a1fd2566afe54461216cd84814d42John McCall SizeOfPointee = Info.Ctx.getTypeSizeInChars(PointeeType); 7224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 7232de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add) 724efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset += AdditionalOffset * SizeOfPointee; 725650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson else 726efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset -= AdditionalOffset * SizeOfPointee; 7274efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 728efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 729650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 7304efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 731efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitUnaryAddrOf(const UnaryOperator *E) { 732efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluateLValue(E->getSubExpr(), Result, Info); 7334efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 7341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 735650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 7368cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool PointerExprEvaluator::VisitCastExpr(const CastExpr* E) { 7378cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr* SubExpr = E->getSubExpr(); 738650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 73909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman switch (E->getCastKind()) { 74009a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman default: 74109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 74209a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 7432de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_NoOp: 7442de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_BitCast: 7451d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_CPointerToObjCPointerCast: 7461d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_BlockPointerToObjCPointerCast: 7472de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_AnyPointerToBlockPointerCast: 74809a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman return Visit(SubExpr); 74909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 7505c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson case CK_DerivedToBase: 7515c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson case CK_UncheckedDerivedToBase: { 7525c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson LValue BaseLV; 7535c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson if (!EvaluatePointer(E->getSubExpr(), BaseLV, Info)) 7545c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return false; 7555c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 7565c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // Now figure out the necessary offset to add to the baseLV to get from 7575c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // the derived class to the base class. 7587c7f820d70c925b29290a8563b59615816a827fcKen Dyck CharUnits Offset = CharUnits::Zero(); 7595c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 7605c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson QualType Ty = E->getSubExpr()->getType(); 7615c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXRecordDecl *DerivedDecl = 7625c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson Ty->getAs<PointerType>()->getPointeeType()->getAsCXXRecordDecl(); 7635c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 7645c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson for (CastExpr::path_const_iterator PathI = E->path_begin(), 7655c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson PathE = E->path_end(); PathI != PathE; ++PathI) { 7665c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXBaseSpecifier *Base = *PathI; 7675c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 7685c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // FIXME: If the base is virtual, we'd need to determine the type of the 7695c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // most derived class and we don't support that right now. 7705c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson if (Base->isVirtual()) 7715c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return false; 7725c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 7735c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXRecordDecl *BaseDecl = Base->getType()->getAsCXXRecordDecl(); 7745c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const ASTRecordLayout &Layout = Info.Ctx.getASTRecordLayout(DerivedDecl); 7755c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 7767c7f820d70c925b29290a8563b59615816a827fcKen Dyck Offset += Layout.getBaseClassOffset(BaseDecl); 7775c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson DerivedDecl = BaseDecl; 7785c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson } 7795c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 7805c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson Result.Base = BaseLV.getLValueBase(); 7817c7f820d70c925b29290a8563b59615816a827fcKen Dyck Result.Offset = BaseLV.getLValueOffset() + Offset; 7825c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return true; 7835c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson } 7845c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 785404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall case CK_NullToPointer: { 786404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall Result.Base = 0; 787404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall Result.Offset = CharUnits::Zero(); 788404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall return true; 789404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall } 790404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall 7912de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_IntegralToPointer: { 792efdb83e26f9a1fd2566afe54461216cd84814d42John McCall APValue Value; 793efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateIntegerOrLValue(SubExpr, Value, Info)) 79409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 79569ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 796efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (Value.isInt()) { 7979f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Value.getInt() = Value.getInt().extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 798efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = 0; 799efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::fromQuantity(Value.getInt().getZExtValue()); 800efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 801efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else { 802efdb83e26f9a1fd2566afe54461216cd84814d42John McCall // Cast is of an lvalue, no need to change value. 803efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = Value.getLValueBase(); 804efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = Value.getLValueOffset(); 805efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 806650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 807650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 8082de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_ArrayToPointerDecay: 8092de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_FunctionToPointerDecay: 810efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluateLValue(SubExpr, Result, Info); 8114efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 8124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 813efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 8141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 815650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 8168cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool PointerExprEvaluator::VisitCallExpr(const CallExpr *E) { 8171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (E->isBuiltinCall(Info.Ctx) == 8180d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Builtin::BI__builtin___CFStringMakeConstantString || 8190d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall E->isBuiltinCall(Info.Ctx) == 8200d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Builtin::BI__builtin___NSStringMakeConstantString) 821efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 82256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 8238cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitCallExpr(E); 8244efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 825f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 826f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 82759b5da6d853b4368b984700315adf7b37de05764Nate Begeman// Vector Evaluation 82859b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 82959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 83059b5da6d853b4368b984700315adf7b37de05764Nate Begemannamespace { 831770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramer class VectorExprEvaluator 83207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith : public ExprEvaluatorBase<VectorExprEvaluator, bool> { 83307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith APValue &Result; 83459b5da6d853b4368b984700315adf7b37de05764Nate Begeman public: 8351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83607fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith VectorExprEvaluator(EvalInfo &info, APValue &Result) 83707fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith : ExprEvaluatorBaseTy(info), Result(Result) {} 8381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83907fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool Success(const ArrayRef<APValue> &V, const Expr *E) { 84007fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith assert(V.size() == E->getType()->castAs<VectorType>()->getNumElements()); 84107fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith // FIXME: remove this APValue copy. 84207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith Result = APValue(V.data(), V.size()); 84307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return true; 84407fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith } 84507fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool Success(const APValue &V, const Expr *E) { 84607fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith Result = V; 84707fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return true; 84807fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith } 84907fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool Error(const Expr *E) { return false; } 85007fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool ValueInitialization(const Expr *E); 8511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 85207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool VisitUnaryReal(const UnaryOperator *E) 85391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 85407fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool VisitCastExpr(const CastExpr* E); 85507fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 85607fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool VisitInitListExpr(const InitListExpr *E); 85707fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith bool VisitUnaryImag(const UnaryOperator *E); 85891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // FIXME: Missing: unary -, unary ~, binary add/sub/mul/div, 8592217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // binary comparisons, binary and/or/xor, 86091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // shufflevector, ExtVectorElementExpr 86191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // (Note that these require implementing conversions 86291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // between vector types.) 86359b5da6d853b4368b984700315adf7b37de05764Nate Begeman }; 86459b5da6d853b4368b984700315adf7b37de05764Nate Begeman} // end anonymous namespace 86559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 86659b5da6d853b4368b984700315adf7b37de05764Nate Begemanstatic bool EvaluateVector(const Expr* E, APValue& Result, EvalInfo &Info) { 86759b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!E->getType()->isVectorType()) 86859b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 86907fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return VectorExprEvaluator(Info, Result).Visit(E); 87059b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 87159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 87207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smithbool VectorExprEvaluator::VisitCastExpr(const CastExpr* E) { 87307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith const VectorType *VTy = E->getType()->castAs<VectorType>(); 874c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman QualType EltTy = VTy->getElementType(); 875c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned NElts = VTy->getNumElements(); 876c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned EltWidth = Info.Ctx.getTypeSize(EltTy); 8771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 87859b5da6d853b4368b984700315adf7b37de05764Nate Begeman const Expr* SE = E->getSubExpr(); 879e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman QualType SETy = SE->getType(); 88059b5da6d853b4368b984700315adf7b37de05764Nate Begeman 88146a523285928aa07bf14803178dc04616ac85994Eli Friedman switch (E->getCastKind()) { 88246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_VectorSplat: { 88307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith APValue Val = APValue(); 88446a523285928aa07bf14803178dc04616ac85994Eli Friedman if (SETy->isIntegerType()) { 88546a523285928aa07bf14803178dc04616ac85994Eli Friedman APSInt IntResult; 88646a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!EvaluateInteger(SE, IntResult, Info)) 88707fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Error(E); 88807fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith Val = APValue(IntResult); 88946a523285928aa07bf14803178dc04616ac85994Eli Friedman } else if (SETy->isRealFloatingType()) { 89046a523285928aa07bf14803178dc04616ac85994Eli Friedman APFloat F(0.0); 89146a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!EvaluateFloat(SE, F, Info)) 89207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Error(E); 89307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith Val = APValue(F); 89446a523285928aa07bf14803178dc04616ac85994Eli Friedman } else { 89507fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Error(E); 89646a523285928aa07bf14803178dc04616ac85994Eli Friedman } 897c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 898c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // Splat and create vector APValue. 89907fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith SmallVector<APValue, 4> Elts(NElts, Val); 90007fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Success(Elts, E); 901e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } 90246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_BitCast: { 90307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith // FIXME: this is wrong for any cast other than a no-op cast. 90446a523285928aa07bf14803178dc04616ac85994Eli Friedman if (SETy->isVectorType()) 9058cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Visit(SE); 906c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 90746a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!SETy->isIntegerType()) 90807fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Error(E); 9091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 91046a523285928aa07bf14803178dc04616ac85994Eli Friedman APSInt Init; 91146a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!EvaluateInteger(SE, Init, Info)) 91207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Error(E); 913c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 91446a523285928aa07bf14803178dc04616ac85994Eli Friedman assert((EltTy->isIntegerType() || EltTy->isRealFloatingType()) && 91546a523285928aa07bf14803178dc04616ac85994Eli Friedman "Vectors must be composed of ints or floats"); 91646a523285928aa07bf14803178dc04616ac85994Eli Friedman 9175f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<APValue, 4> Elts; 91846a523285928aa07bf14803178dc04616ac85994Eli Friedman for (unsigned i = 0; i != NElts; ++i) { 91946a523285928aa07bf14803178dc04616ac85994Eli Friedman APSInt Tmp = Init.extOrTrunc(EltWidth); 92046a523285928aa07bf14803178dc04616ac85994Eli Friedman 92146a523285928aa07bf14803178dc04616ac85994Eli Friedman if (EltTy->isIntegerType()) 92246a523285928aa07bf14803178dc04616ac85994Eli Friedman Elts.push_back(APValue(Tmp)); 92346a523285928aa07bf14803178dc04616ac85994Eli Friedman else 92446a523285928aa07bf14803178dc04616ac85994Eli Friedman Elts.push_back(APValue(APFloat(Tmp))); 92546a523285928aa07bf14803178dc04616ac85994Eli Friedman 92646a523285928aa07bf14803178dc04616ac85994Eli Friedman Init >>= EltWidth; 92746a523285928aa07bf14803178dc04616ac85994Eli Friedman } 92807fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Success(Elts, E); 92946a523285928aa07bf14803178dc04616ac85994Eli Friedman } 93046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_LValueToRValue: 93146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_NoOp: 9328cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Visit(SE); 93346a523285928aa07bf14803178dc04616ac85994Eli Friedman default: 93407fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Error(E); 935c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman } 93659b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 93759b5da6d853b4368b984700315adf7b37de05764Nate Begeman 93807fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smithbool 93959b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 94007fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Visit(E->getInitializer()); 94159b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 94259b5da6d853b4368b984700315adf7b37de05764Nate Begeman 94307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smithbool 94459b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 94507fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith const VectorType *VT = E->getType()->castAs<VectorType>(); 94659b5da6d853b4368b984700315adf7b37de05764Nate Begeman unsigned NumInits = E->getNumInits(); 94791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman unsigned NumElements = VT->getNumElements(); 9481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 94959b5da6d853b4368b984700315adf7b37de05764Nate Begeman QualType EltTy = VT->getElementType(); 9505f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<APValue, 4> Elements; 95159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 952a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // If a vector is initialized with a single element, that value 953a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // becomes every element of the vector, not just the first. 954a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // This is the behavior described in the IBM AltiVec documentation. 955a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (NumInits == 1) { 95607fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith 95707fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith // Handle the case where the vector is initialized by another 958b92ae0e31126e5630d7022f2d6abe7eed2e17746Tanya Lattner // vector (OpenCL 6.1.6). 959b92ae0e31126e5630d7022f2d6abe7eed2e17746Tanya Lattner if (E->getInit(0)->getType()->isVectorType()) 96007fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Visit(E->getInit(0)); 96107fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith 962a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall APValue InitValue; 96359b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (EltTy->isIntegerType()) { 96459b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APSInt sInt(32); 965a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(0), sInt, Info)) 96607fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Error(E); 967a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(sInt); 96859b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else { 96959b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APFloat f(0.0); 970a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(0), f, Info)) 97107fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Error(E); 972a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(f); 973a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 974a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 975a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(InitValue); 976a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 977a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 978a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 979a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (EltTy->isIntegerType()) { 980a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APSInt sInt(32); 981a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 982a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(i), sInt, Info)) 98307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Error(E); 984a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 985a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall sInt = Info.Ctx.MakeIntValue(0, EltTy); 986a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 987a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(sInt)); 98891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 989a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APFloat f(0.0); 990a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 991a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(i), f, Info)) 99207fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Error(E); 993a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 994a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall f = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy)); 995a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 996a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(f)); 99791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 99859b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 99959b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 100007fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Success(Elements, E); 100159b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 100259b5da6d853b4368b984700315adf7b37de05764Nate Begeman 100307fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smithbool 100407fc657e3077531805b0e2dbf8f8964d48daa38bRichard SmithVectorExprEvaluator::ValueInitialization(const Expr *E) { 100507fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith const VectorType *VT = E->getType()->getAs<VectorType>(); 100691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman QualType EltTy = VT->getElementType(); 100791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue ZeroElement; 100891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EltTy->isIntegerType()) 100991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = APValue(Info.Ctx.MakeIntValue(0, EltTy)); 101091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman else 101191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = 101291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue(APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy))); 101391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 10145f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner SmallVector<APValue, 4> Elements(VT->getNumElements(), ZeroElement); 101507fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return Success(Elements, E); 101691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 101791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 101807fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smithbool VectorExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 10198327fad71da34492d82c532f42a58cb4baff81a3Richard Smith VisitIgnoredValue(E->getSubExpr()); 102007fc657e3077531805b0e2dbf8f8964d48daa38bRichard Smith return ValueInitialization(E); 102191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 102291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 102359b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 1024f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Integer Evaluation 1025f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1026f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 1027f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnernamespace { 1028770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass IntExprEvaluator 10298cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<IntExprEvaluator, bool> { 103030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue &Result; 1031f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerpublic: 103230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar IntExprEvaluator(EvalInfo &info, APValue &result) 10338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(result) {} 1034f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 1035973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara bool Success(const llvm::APSInt &SI, const Expr *E) { 1036973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara assert(E->getType()->isIntegralOrEnumerationType() && 10372ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 1038973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara assert(SI.isSigned() == E->getType()->isSignedIntegerOrEnumerationType() && 10393f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 1040973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara assert(SI.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 10413f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 104230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(SI); 10433f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 10443f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 10453f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 1046131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(const llvm::APInt &I, const Expr *E) { 10472ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 10482ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 104930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(I.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 10503f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 105130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(APSInt(I)); 1052575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor Result.getInt().setIsUnsigned( 1053575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor E->getType()->isUnsignedIntegerOrEnumerationType()); 1054131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 1055131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 1056131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 1057131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(uint64_t Value, const Expr *E) { 10582ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 10592ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 106030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(Info.Ctx.MakeIntValue(Value, E->getType())); 1061131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 1062131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 1063131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 10644f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck bool Success(CharUnits Size, const Expr *E) { 10654f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(Size.getQuantity(), E); 10664f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck } 10674f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck 10684f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck 106982206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Error(SourceLocation L, diag::kind D, const Expr *E) { 107032fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // Take the first error. 10711e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (Info.EvalStatus.Diag == 0) { 10721e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith Info.EvalStatus.DiagLoc = L; 10731e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith Info.EvalStatus.Diag = D; 10741e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith Info.EvalStatus.DiagExpr = E; 107532fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 107654176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return false; 10777a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner } 10781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10798cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const APValue &V, const Expr *E) { 10808cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Success(V.getInt(), E); 108132fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 10828cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Error(const Expr *E) { 10830e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1084f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner } 10851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1086f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith bool ValueInitialization(const Expr *E) { return Success(0, E); } 1087f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith 10888cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 10898cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne // Visitor Methods 10908cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 1091f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 10924c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitIntegerLiteral(const IntegerLiteral *E) { 1093131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 10944c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 10954c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCharacterLiteral(const CharacterLiteral *E) { 1096131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 10974c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 1098043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 1099043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool CheckReferencedDecl(const Expr *E, const Decl *D); 1100043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitDeclRefExpr(const DeclRefExpr *E) { 11018cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (CheckReferencedDecl(E, E->getDecl())) 11028cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 11038cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 11048cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitDeclRefExpr(E); 1105043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 1106043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitMemberExpr(const MemberExpr *E) { 1107043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (CheckReferencedDecl(E, E->getMemberDecl())) { 1108043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman // Conservatively assume a MemberExpr will have side-effects 11091e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith Info.EvalStatus.HasSideEffects = true; 1110043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return true; 1111043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 11128cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 11138cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitMemberExpr(E); 1114043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 1115043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 11168cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCallExpr(const CallExpr *E); 1117b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitBinaryOperator(const BinaryOperator *E); 11188ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor bool VisitOffsetOfExpr(const OffsetOfExpr *E); 1119b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitUnaryOperator(const UnaryOperator *E); 1120f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 11218cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr* E); 1122f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne bool VisitUnaryExprOrTypeTraitExpr(const UnaryExprOrTypeTraitExpr *E); 11230518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 11243068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 1125131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 11263068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 11271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1128f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith // Note, GNU defines __null as an integer, not a pointer. 11293f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson bool VisitGNUNullExpr(const GNUNullExpr *E) { 1130f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return ValueInitialization(E); 1131664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman } 1132664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 113364b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) { 11340dfd848fa4c9664852ba8c929a8bd3fce93ddca2Sebastian Redl return Success(E->getValue(), E); 113564b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl } 113664b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl 11376ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet bool VisitBinaryTypeTraitExpr(const BinaryTypeTraitExpr *E) { 11386ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet return Success(E->getValue(), E); 11396ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet } 11406ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet 114121ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley bool VisitArrayTypeTraitExpr(const ArrayTypeTraitExpr *E) { 114221ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley return Success(E->getValue(), E); 114321ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley } 114421ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley 1145552622067dc45013d240f73952fece703f5e63bdJohn Wiegley bool VisitExpressionTraitExpr(const ExpressionTraitExpr *E) { 1146552622067dc45013d240f73952fece703f5e63bdJohn Wiegley return Success(E->getValue(), E); 1147552622067dc45013d240f73952fece703f5e63bdJohn Wiegley } 1148552622067dc45013d240f73952fece703f5e63bdJohn Wiegley 1149722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman bool VisitUnaryReal(const UnaryOperator *E); 1150664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitUnaryImag(const UnaryOperator *E); 1151664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 1152295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl bool VisitCXXNoexceptExpr(const CXXNoexceptExpr *E); 1153ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor bool VisitSizeOfPackExpr(const SizeOfPackExpr *E); 1154cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl 1155fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattnerprivate: 11568b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfExpr(const Expr *E); 11578b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfType(QualType T); 115842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall static QualType GetObjectType(const Expr *E); 11598cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool TryEvaluateBuiltinObjectSize(const CallExpr *E); 1160664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman // FIXME: Missing: array subscript of vector, member of vector 1161f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner}; 1162f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 1163f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 116469ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateIntegerOrLValue(const Expr* E, APValue &Result, EvalInfo &Info) { 11652ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType()); 11668cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return IntExprEvaluator(Info, Result).Visit(E); 116769ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar} 116869ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 116969ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateInteger(const Expr* E, APSInt &Result, EvalInfo &Info) { 11702ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType()); 11717db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall 117230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue Val; 117369ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (!EvaluateIntegerOrLValue(E, Val, Info) || !Val.isInt()) 117430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 117530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = Val.getInt(); 117630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return true; 1177f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 1178f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 1179043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedmanbool IntExprEvaluator::CheckReferencedDecl(const Expr* E, const Decl* D) { 11804c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Enums are integer constant exprs. 1181bfbdcd861a4364bfc21a9e5047bdbd56812d6693Abramo Bagnara if (const EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(D)) { 1182973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara // Check for signedness/width mismatches between E type and ECD value. 1183973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara bool SameSign = (ECD->getInitVal().isSigned() 1184973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara == E->getType()->isSignedIntegerOrEnumerationType()); 1185973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara bool SameWidth = (ECD->getInitVal().getBitWidth() 1186973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara == Info.Ctx.getIntWidth(E->getType())); 1187973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara if (SameSign && SameWidth) 1188973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara return Success(ECD->getInitVal(), E); 1189973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara else { 1190973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara // Get rid of mismatch (otherwise Success assertions will fail) 1191973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara // by computing a new value matching the type of E. 1192973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara llvm::APSInt Val = ECD->getInitVal(); 1193973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara if (!SameSign) 1194973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara Val.setIsSigned(!ECD->getInitVal().isSigned()); 1195973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara if (!SameWidth) 1196973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara Val = Val.extOrTrunc(Info.Ctx.getIntWidth(E->getType())); 1197973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara return Success(Val, E); 1198973c4fc0b0a88f9cea273b16f2082788a6e57d74Abramo Bagnara } 1199bfbdcd861a4364bfc21a9e5047bdbd56812d6693Abramo Bagnara } 1200b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 1201b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl // In C++, const, non-volatile integers initialized with ICEs are ICEs. 1202e1646da3bb0fe97b372e5fe8cefc537b22048fc4Eli Friedman // In C, they can also be folded, although they are not ICEs. 120303f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith if (IsConstNonVolatile(E->getType())) { 1204043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 120503f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith APValue *V = EvaluateVarDeclInit(Info, VD); 120603f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith if (V && V->isInt()) 120703f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith return Success(V->getInt(), E); 1208b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 1209b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 1210b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 12114c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Otherwise, random variable references are not constants. 12128cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return false; 12134c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 12144c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner 1215a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way 1216a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// as GCC. 1217a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattnerstatic int EvaluateBuiltinClassifyType(const CallExpr *E) { 1218a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // The following enum mimics the values returned by GCC. 12197c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl // FIXME: Does GCC differ between lvalue and rvalue references here? 1220a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enum gcc_type_class { 1221a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner no_type_class = -1, 1222a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner void_type_class, integer_type_class, char_type_class, 1223a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enumeral_type_class, boolean_type_class, 1224a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner pointer_type_class, reference_type_class, offset_type_class, 1225a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner real_type_class, complex_type_class, 1226a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner function_type_class, method_type_class, 1227a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner record_type_class, union_type_class, 1228a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner array_type_class, string_type_class, 1229a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner lang_type_class 1230a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner }; 12311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 12321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If no argument was supplied, default to "no_type_class". This isn't 1233a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // ideal, however it is what gcc does. 1234a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (E->getNumArgs() == 0) 1235a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return no_type_class; 12361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1237a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner QualType ArgTy = E->getArg(0)->getType(); 1238a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (ArgTy->isVoidType()) 1239a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return void_type_class; 1240a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isEnumeralType()) 1241a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return enumeral_type_class; 1242a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isBooleanType()) 1243a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return boolean_type_class; 1244a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isCharType()) 1245a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return string_type_class; // gcc doesn't appear to use char_type_class 1246a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isIntegerType()) 1247a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return integer_type_class; 1248a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isPointerType()) 1249a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return pointer_type_class; 1250a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isReferenceType()) 1251a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return reference_type_class; 1252a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isRealType()) 1253a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return real_type_class; 1254a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isComplexType()) 1255a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return complex_type_class; 1256a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isFunctionType()) 1257a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return function_type_class; 1258fb87b89fc9eb103e19fb8e4b925c23f0bd091b99Douglas Gregor else if (ArgTy->isStructureOrClassType()) 1259a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return record_type_class; 1260a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 1261a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 1262a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isArrayType()) 1263a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return array_type_class; 1264a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 1265a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 1266a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else // FIXME: offset_type_class, method_type_class, & lang_type_class? 1267b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("CallExpr::isBuiltinClassifyType(): unimplemented type"); 1268a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return -1; 1269a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner} 1270a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 127142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// Retrieves the "underlying object type" of the given expression, 127242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// as used by __builtin_object_size. 127342c8f87eb60958170c46767273bf93e6c96125bfJohn McCallQualType IntExprEvaluator::GetObjectType(const Expr *E) { 127442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 127542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) 127642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return VD->getType(); 127742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } else if (isa<CompoundLiteralExpr>(E)) { 127842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return E->getType(); 127942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } 128042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 128142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return QualType(); 128242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 128342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 12848cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::TryEvaluateBuiltinObjectSize(const CallExpr *E) { 128542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // TODO: Perhaps we should let LLVM lower this? 128642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall LValue Base; 128742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!EvaluatePointer(E->getArg(0), Base, Info)) 128842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 128942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 129042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // If we can prove the base is null, lower to zero now. 129142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall const Expr *LVBase = Base.getLValueBase(); 129242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!LVBase) return Success(0, E); 129342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 129442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall QualType T = GetObjectType(LVBase); 129542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (T.isNull() || 129642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isIncompleteType() || 12971357869bc5983cdfbc986db1f3d18265bb34cb0eEli Friedman T->isFunctionType() || 129842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isVariablyModifiedType() || 129942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isDependentType()) 130042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 130142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 130242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Size = Info.Ctx.getTypeSizeInChars(T); 130342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Offset = Base.getLValueOffset(); 130442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 130542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!Offset.isNegative() && Offset <= Size) 130642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size -= Offset; 130742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall else 130842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size = CharUnits::Zero(); 13094f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(Size, E); 131042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 131142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 13128cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::VisitCallExpr(const CallExpr *E) { 13133c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 1314019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner default: 13158cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitCallExpr(E); 131664eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 131764eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump case Builtin::BI__builtin_object_size: { 131842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (TryEvaluateBuiltinObjectSize(E)) 131942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 132064eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 1321b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // If evaluating the argument has side-effects we can't determine 1322b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // the size of the object and lower it to unknown now. 1323393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (E->getArg(0)->HasSideEffects(Info.Ctx)) { 1324a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith if (E->getArg(1)->EvaluateKnownConstInt(Info.Ctx).getZExtValue() <= 1) 1325cf184655319cf7a5b811067cff9d26a5741fd161Chris Lattner return Success(-1ULL, E); 132664eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Success(0, E); 132764eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 1328c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 132964eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 133064eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 133164eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 1332019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_classify_type: 1333131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(EvaluateBuiltinClassifyType(E), E); 13341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 13354bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson case Builtin::BI__builtin_constant_p: 1336019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // __builtin_constant_p always has one operand: it returns true if that 1337019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // operand can be folded, false otherwise. 1338131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getArg(0)->isEvaluatable(Info.Ctx), E); 133921fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner 134021fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner case Builtin::BI__builtin_eh_return_data_regno: { 1341a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith int Operand = E->getArg(0)->EvaluateKnownConstInt(Info.Ctx).getZExtValue(); 1342bcfd1f55bfbb3e5944cd5e03d07b343e280838c4Douglas Gregor Operand = Info.Ctx.getTargetInfo().getEHDataRegisterNumber(Operand); 134321fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner return Success(Operand, E); 134421fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner } 1345c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman 1346c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman case Builtin::BI__builtin_expect: 1347c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman return Visit(E->getArg(0)); 13485726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 13495726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor case Builtin::BIstrlen: 13505726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor case Builtin::BI__builtin_strlen: 13515726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // As an extension, we support strlen() and __builtin_strlen() as constant 13525726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // expressions when the argument is a string literal. 13538cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (const StringLiteral *S 13545726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor = dyn_cast<StringLiteral>(E->getArg(0)->IgnoreParenImpCasts())) { 13555726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // The string literal may have embedded null characters. Find the first 13565726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // one and truncate there. 13575f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef Str = S->getString(); 13585f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner StringRef::size_type Pos = Str.find(0); 13595f9e272e632e951b1efe824cd16acb4d96077930Chris Lattner if (Pos != StringRef::npos) 13605726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor Str = Str.substr(0, Pos); 13615726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 13625726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor return Success(Str.size(), E); 13635726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor } 13645726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 13655726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1366454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 1367454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman case Builtin::BI__atomic_is_lock_free: { 1368454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman APSInt SizeVal; 1369454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman if (!EvaluateInteger(E->getArg(0), SizeVal, Info)) 1370454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman return false; 1371454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 1372454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // For __atomic_is_lock_free(sizeof(_Atomic(T))), if the size is a power 1373454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // of two less than the maximum inline atomic width, we know it is 1374454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // lock-free. If the size isn't a power of two, or greater than the 1375454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // maximum alignment where we promote atomics, we know it is not lock-free 1376454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // (at least not in the sense of atomic_is_lock_free). Otherwise, 1377454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // the answer can only be determined at runtime; for example, 16-byte 1378454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // atomics have lock-free implementations on some, but not all, 1379454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // x86-64 processors. 1380454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 1381454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // Check power-of-two. 1382454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman CharUnits Size = CharUnits::fromQuantity(SizeVal.getZExtValue()); 1383454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman if (!Size.isPowerOfTwo()) 1384454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman#if 0 1385454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // FIXME: Suppress this folding until the ABI for the promotion width 1386454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // settles. 1387454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman return Success(0, E); 1388454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman#else 1389454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1390454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman#endif 1391454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 1392454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman#if 0 1393454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // Check against promotion width. 1394454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // FIXME: Suppress this folding until the ABI for the promotion width 1395454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // settles. 1396454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman unsigned PromoteWidthBits = 1397454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman Info.Ctx.getTargetInfo().getMaxAtomicPromoteWidth(); 1398454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman if (Size > Info.Ctx.toCharUnitsFromBits(PromoteWidthBits)) 1399454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman return Success(0, E); 1400454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman#endif 1401454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 1402454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman // Check against inlining width. 1403454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman unsigned InlineWidthBits = 1404454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman Info.Ctx.getTargetInfo().getMaxAtomicInlineWidth(); 1405454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman if (Size <= Info.Ctx.toCharUnitsFromBits(InlineWidthBits)) 1406454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman return Success(1, E); 1407454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman 1408454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1409454b57ac42c9ce0bed9b7a99c2ed5a18fbcd286bEli Friedman } 1410019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 14114c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 1412f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 1413b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 14142de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Comma) { 14158327fad71da34492d82c532f42a58cb4baff81a3Richard Smith VisitIgnoredValue(E->getLHS()); 14168327fad71da34492d82c532f42a58cb4baff81a3Richard Smith return Visit(E->getRHS()); 1417a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1418a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1419a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->isLogicalOp()) { 1420a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // These need to be handled specially because the operands aren't 1421a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // necessarily integral 1422fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool lhsResult, rhsResult; 14231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1424fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getLHS(), lhsResult, Info)) { 142551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // We were able to evaluate the LHS, see if we can get away with not 142651fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // evaluating the RHS: 0 && X -> 0, 1 || X -> 1 14272de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (lhsResult == (E->getOpcode() == BO_LOr)) 14283f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(lhsResult, E); 1429a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1430fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 14312de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_LOr) 1432131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult || rhsResult, E); 14334bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson else 1434131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult && rhsResult, E); 14354bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 14364bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } else { 1437fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 14384bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // We can't evaluate the LHS; however, sometimes the result 14394bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // is determined by the RHS: X && 0 -> 0, X || 1 -> 1. 14402de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (rhsResult == (E->getOpcode() == BO_LOr) || 14412de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall !rhsResult == (E->getOpcode() == BO_LAnd)) { 1442131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // Since we weren't able to evaluate the left hand side, it 1443fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // must have had side effects. 14441e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith Info.EvalStatus.HasSideEffects = true; 1445131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 1446131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(rhsResult, E); 14474bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 14484bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 1449a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1450a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1451a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1452c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner } 145354176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 1454286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType LHSTy = E->getLHS()->getType(); 1455286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType RHSTy = E->getRHS()->getType(); 14564087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 14574087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHSTy->isAnyComplexType()) { 14584087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar assert(RHSTy->isAnyComplexType() && "Invalid comparison"); 1459f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS, RHS; 14604087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 14614087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getLHS(), LHS, Info)) 14624087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 14634087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 14644087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 14654087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 14664087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 14674087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHS.isComplexFloat()) { 14681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_r = 14694087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatReal().compare(RHS.getComplexFloatReal()); 14701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_i = 14714087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatImag().compare(RHS.getComplexFloatImag()); 14724087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 14732de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) 1474131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((CR_r == APFloat::cmpEqual && 1475131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpEqual), E); 1476131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 14772de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(E->getOpcode() == BO_NE && 1478131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid complex comparison."); 14791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(((CR_r == APFloat::cmpGreaterThan || 1480fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpLessThan || 1481fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpUnordered) || 14821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (CR_i == APFloat::cmpGreaterThan || 1483fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpLessThan || 1484fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpUnordered)), E); 1485131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 14864087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } else { 14872de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) 1488131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() == RHS.getComplexIntReal() && 1489131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() == RHS.getComplexIntImag()), E); 1490131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 14912de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(E->getOpcode() == BO_NE && 1492131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid compex comparison."); 1493131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() != RHS.getComplexIntReal() || 1494131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() != RHS.getComplexIntImag()), E); 1495131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 14964087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 14974087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 14981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1499286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (LHSTy->isRealFloatingType() && 1500286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson RHSTy->isRealFloatingType()) { 1501286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat RHS(0.0), LHS(0.0); 15021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1503286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1504286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 15051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1506286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getLHS(), LHS, Info)) 1507286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 15081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1509286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat::cmpResult CR = LHS.compare(RHS); 1510529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson 1511286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson switch (E->getOpcode()) { 1512286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson default: 1513b219cfc4d75f0a03630b7c4509ef791b7e97b2c8David Blaikie llvm_unreachable("Invalid binary operator!"); 15142de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: 1515131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan, E); 15162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: 1517131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan, E); 15182de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: 1519131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan || CR == APFloat::cmpEqual, E); 15202de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: 15211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan || CR == APFloat::cmpEqual, 1522131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 15232de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: 1524131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpEqual, E); 15252de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: 15261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan 1527fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpLessThan 1528fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpUnordered, E); 1529286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 1530286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 15311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1532ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (LHSTy->isPointerType() && RHSTy->isPointerType()) { 15332de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Sub || E->isEqualityOp()) { 1534efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LHSValue; 15353068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getLHS(), LHSValue, Info)) 15363068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1537a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1538efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue RHSValue; 15393068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getRHS(), RHSValue, Info)) 15403068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1541a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 15425bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // Reject any bases from the normal codepath; we special-case comparisons 15435bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // to null. 15445bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (LHSValue.getLValueBase()) { 15455bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 15465bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 1547a73058324197b7bdfd19307965954f626e26199dKen Dyck if (RHSValue.getLValueBase() || !RHSValue.getLValueOffset().isZero()) 15485bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 15495bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 15505bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(LHSValue, bres)) 15515bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 15522de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall return Success(bres ^ (E->getOpcode() == BO_EQ), E); 15535bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } else if (RHSValue.getLValueBase()) { 15545bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 15555bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 1556a73058324197b7bdfd19307965954f626e26199dKen Dyck if (LHSValue.getLValueBase() || !LHSValue.getLValueOffset().isZero()) 15575bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 15585bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 15595bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(RHSValue, bres)) 15605bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 15612de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall return Success(bres ^ (E->getOpcode() == BO_EQ), E); 15625bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } 1563a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 15642de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Sub) { 15654992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType Type = E->getLHS()->getType(); 15664992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType ElementType = Type->getAs<PointerType>()->getPointeeType(); 15673068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 1568a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits ElementSize = CharUnits::One(); 1569ce1bca73aef9bbf6359ab8420278203dda81a054Eli Friedman if (!ElementType->isVoidType() && !ElementType->isFunctionType()) 1570a73058324197b7bdfd19307965954f626e26199dKen Dyck ElementSize = Info.Ctx.getTypeSizeInChars(ElementType); 1571a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1572a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Diff = LHSValue.getLValueOffset() - 1573a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSValue.getLValueOffset(); 1574a73058324197b7bdfd19307965954f626e26199dKen Dyck return Success(Diff / ElementSize, E); 1575ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1576ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman bool Result; 15772de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) { 1578ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() == RHSValue.getLValueOffset(); 1579267c0ab1b9a15768f3f15abbfc40ce344751c78bEli Friedman } else { 1580ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() != RHSValue.getLValueOffset(); 1581ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1582ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman return Success(Result, E); 15833068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 15843068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 15852ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!LHSTy->isIntegralOrEnumerationType() || 15862ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor !RHSTy->isIntegralOrEnumerationType()) { 1587a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // We can't continue from here for non-integral types, and they 1588a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // could potentially confuse the following operations. 1589a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1590a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1591a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1592a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // The LHS of a constant expr is always evaluated and needed. 159330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Visit(E->getLHS())) 1594a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; // error in subexpression. 1595d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman 159642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APValue RHSVal; 159742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!EvaluateIntegerOrLValue(E->getRHS(), RHSVal, Info)) 159830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 159942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 160042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like (unsigned long)&a + 4. 160142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->isAdditiveOp() && Result.isLValue() && RHSVal.isInt()) { 1602a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Offset = Result.getLValueOffset(); 1603a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits AdditionalOffset = CharUnits::fromQuantity( 1604a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSVal.getInt().getZExtValue()); 16052de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add) 1606a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset += AdditionalOffset; 160742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman else 1608a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset -= AdditionalOffset; 1609a73058324197b7bdfd19307965954f626e26199dKen Dyck Result = APValue(Result.getLValueBase(), Offset); 161042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 161142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 161242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 161342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like 4 + (unsigned long)&a 16142de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add && 161542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman RHSVal.isLValue() && Result.isInt()) { 1616a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Offset = RHSVal.getLValueOffset(); 1617a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset += CharUnits::fromQuantity(Result.getInt().getZExtValue()); 1618a73058324197b7bdfd19307965954f626e26199dKen Dyck Result = APValue(RHSVal.getLValueBase(), Offset); 161942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 162042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 162142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 162242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // All the following cases expect both operands to be an integer 162342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!Result.isInt() || !RHSVal.isInt()) 1624b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1625a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 162642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APSInt& RHS = RHSVal.getInt(); 162742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 1628a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson switch (E->getOpcode()) { 162932fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner default: 16300e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 16312de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: return Success(Result.getInt() * RHS, E); 16322de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: return Success(Result.getInt() + RHS, E); 16332de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: return Success(Result.getInt() - RHS, E); 16342de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_And: return Success(Result.getInt() & RHS, E); 16352de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Xor: return Success(Result.getInt() ^ RHS, E); 16362de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Or: return Success(Result.getInt() | RHS, E); 16372de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 163854176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 16390e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 164030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() / RHS, E); 16412de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Rem: 164254176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 16430e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 164430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() % RHS, E); 16452de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shl: { 1646091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall // During constant-folding, a negative shift is an opposite shift. 1647091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall if (RHS.isSigned() && RHS.isNegative()) { 1648091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall RHS = -RHS; 1649091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall goto shift_right; 1650091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall } 1651091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall 1652091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall shift_left: 1653091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall unsigned SA 1654091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall = (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 165530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() << SA, E); 16563f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 16572de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shr: { 1658091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall // During constant-folding, a negative shift is an opposite shift. 1659091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall if (RHS.isSigned() && RHS.isNegative()) { 1660091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall RHS = -RHS; 1661091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall goto shift_left; 1662091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall } 1663091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall 1664091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall shift_right: 16651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 166630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 166730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() >> SA, E); 16683f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 16691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16702de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: return Success(Result.getInt() < RHS, E); 16712de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: return Success(Result.getInt() > RHS, E); 16722de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: return Success(Result.getInt() <= RHS, E); 16732de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: return Success(Result.getInt() >= RHS, E); 16742de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: return Success(Result.getInt() == RHS, E); 16752de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: return Success(Result.getInt() != RHS, E); 1676b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 1677a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 1678a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 16798b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfType(QualType T) { 16805d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 16815d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 16825d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 16835d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 16845d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = T->getAs<ReferenceType>()) 16855d484e8cf710207010720589d89602233de61d01Sebastian Redl T = Ref->getPointeeType(); 16869f1210c3280104417a4ad30f0a00825ac8fa718aChad Rosier 16879f1210c3280104417a4ad30f0a00825ac8fa718aChad Rosier // __alignof is defined to return the preferred alignment. 16889f1210c3280104417a4ad30f0a00825ac8fa718aChad Rosier return Info.Ctx.toCharUnitsFromBits( 16899f1210c3280104417a4ad30f0a00825ac8fa718aChad Rosier Info.Ctx.getPreferredTypeAlign(T.getTypePtr())); 1690e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1691e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 16928b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfExpr(const Expr *E) { 1693af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner E = E->IgnoreParens(); 1694af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1695af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // alignof decl is always accepted, even if it doesn't make sense: we default 16961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // to 1 in those cases. 1697af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 16988b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(DRE->getDecl(), 16998b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 1700a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1701af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) 17028b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(ME->getMemberDecl(), 17038b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 1704af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1705e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(E->getType()); 1706e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1707e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1708e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1709f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne/// VisitUnaryExprOrTypeTraitExpr - Evaluate a sizeof, alignof or vec_step with 1710f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne/// a result as the expression's type. 1711f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbournebool IntExprEvaluator::VisitUnaryExprOrTypeTraitExpr( 1712f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne const UnaryExprOrTypeTraitExpr *E) { 1713f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne switch(E->getKind()) { 1714f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case UETT_AlignOf: { 1715e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (E->isArgumentType()) 17164f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(GetAlignOfType(E->getArgumentType()), E); 1717e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner else 17184f3bc8f7aa90b72832b03bee9201c98f4bb6b4d1Ken Dyck return Success(GetAlignOfExpr(E->getArgumentExpr()), E); 1719e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner } 1720a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1721f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case UETT_VecStep: { 1722f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne QualType Ty = E->getTypeOfArgument(); 17230518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 1724f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (Ty->isVectorType()) { 1725f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne unsigned n = Ty->getAs<VectorType>()->getNumElements(); 1726a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1727f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // The vec_step built-in functions that take a 3-component 1728f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // vector return 4. (OpenCL 1.1 spec 6.11.12) 1729f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (n == 3) 1730f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne n = 4; 1731f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 1732f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return Success(n, E); 1733f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } else 1734f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return Success(1, E); 1735f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } 1736f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 1737f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case UETT_SizeOf: { 1738f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne QualType SrcTy = E->getTypeOfArgument(); 1739f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 1740f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // the result is the size of the referenced type." 1741f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 1742f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // result shall be the alignment of the referenced type." 1743f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (const ReferenceType *Ref = SrcTy->getAs<ReferenceType>()) 1744f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne SrcTy = Ref->getPointeeType(); 1745f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 1746f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc 1747f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // extension. 1748f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (SrcTy->isVoidType() || SrcTy->isFunctionType()) 1749f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return Success(1, E); 1750f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 1751f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. 1752f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if (!SrcTy->isConstantSizeType()) 1753f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return false; 1754f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 1755f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne // Get information about the size. 1756f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return Success(Info.Ctx.getTypeSizeInChars(SrcTy), E); 1757f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } 1758f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne } 1759f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne 1760f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne llvm_unreachable("unknown expr/type trait"); 1761f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne return false; 1762fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner} 1763fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 17648cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::VisitOffsetOfExpr(const OffsetOfExpr *OOE) { 17658ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits Result; 17668cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne unsigned n = OOE->getNumComponents(); 17678ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (n == 0) 17688ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 17698cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne QualType CurrentType = OOE->getTypeSourceInfo()->getType(); 17708ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor for (unsigned i = 0; i != n; ++i) { 17718ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor OffsetOfExpr::OffsetOfNode ON = OOE->getComponent(i); 17728ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor switch (ON.getKind()) { 17738ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Array: { 17748cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr *Idx = OOE->getIndexExpr(ON.getArrayExprIndex()); 17758ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor APSInt IdxResult; 17768ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!EvaluateInteger(Idx, IdxResult, Info)) 17778ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 17788ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ArrayType *AT = Info.Ctx.getAsArrayType(CurrentType); 17798ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!AT) 17808ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 17818ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = AT->getElementType(); 17828ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits ElementSize = Info.Ctx.getTypeSizeInChars(CurrentType); 17838ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Result += IdxResult.getSExtValue() * ElementSize; 17848ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 17858ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 17868ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 17878ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Field: { 17888ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor FieldDecl *MemberDecl = ON.getField(); 17898ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 17908ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!RT) 17918ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 17928ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor RecordDecl *RD = RT->getDecl(); 17938ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 1794ba4f5d5754c8291690d01ca9581926673d69b24cJohn McCall unsigned i = MemberDecl->getFieldIndex(); 1795cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor assert(i < RL.getFieldCount() && "offsetof field in wrong type"); 1796fb1e3bc29b667f4275e1d5a43d64ec173f4f9a7dKen Dyck Result += Info.Ctx.toCharUnitsFromBits(RL.getFieldOffset(i)); 17978ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = MemberDecl->getType().getNonReferenceType(); 17988ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 17998ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 18008ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 18018ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Identifier: 18028ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor llvm_unreachable("dependent __builtin_offsetof"); 1803cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1804cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1805cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor case OffsetOfExpr::OffsetOfNode::Base: { 1806cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CXXBaseSpecifier *BaseSpec = ON.getBase(); 1807cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (BaseSpec->isVirtual()) 1808cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1809cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1810cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the layout of the class whose base we are looking into. 1811cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 1812cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (!RT) 1813cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1814cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor RecordDecl *RD = RT->getDecl(); 1815cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 1816cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1817cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the base class itself. 1818cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CurrentType = BaseSpec->getType(); 1819cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *BaseRT = CurrentType->getAs<RecordType>(); 1820cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (!BaseRT) 1821cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1822cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1823cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Add the offset to the base. 18247c7f820d70c925b29290a8563b59615816a827fcKen Dyck Result += RL.getBaseClassOffset(cast<CXXRecordDecl>(BaseRT->getDecl())); 1825cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor break; 1826cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor } 18278ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 18288ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 18298cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return Success(Result, OOE); 18308ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor} 18318ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 1832b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 18332de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == UO_LNot) { 1834a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // LNot's operand isn't necessarily an integer, so we handle it specially. 1835a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman bool bres; 1836a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!HandleConversionToBool(E->getSubExpr(), bres, Info)) 1837a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1838131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(!bres, E); 1839a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1840a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 18414fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar // Only handle integral operations... 18422ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!E->getSubExpr()->getType()->isIntegralOrEnumerationType()) 18434fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar return false; 18444fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar 184587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner // Get the operand value into 'Result'. 184687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!Visit(E->getSubExpr())) 184775a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner return false; 1848a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 184975a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner switch (E->getOpcode()) { 18504c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner default: 185175a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 185275a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // See C99 6.6p3. 18530e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 18542de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: 18554c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // FIXME: Should extension allow i-c-e extension expressions in its scope? 18564c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // If so, we could clear the diagnostic ID. 18573f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 18582de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 18591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // The result is always just the subexpr. 18603f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 18612de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 186230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 186330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(-Result.getInt(), E); 18642de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 186530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 186630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(~Result.getInt(), E); 186706a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson } 1868a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 18691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1870732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// HandleCast - This is used to evaluate implicit or explicit casts where the 1871732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// result type is integer. 18728cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool IntExprEvaluator::VisitCastExpr(const CastExpr *E) { 18738cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr *SubExpr = E->getSubExpr(); 187482206e267ce6cc709797127616f64672d255b310Anders Carlsson QualType DestType = E->getType(); 1875b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar QualType SrcType = SubExpr->getType(); 187682206e267ce6cc709797127616f64672d255b310Anders Carlsson 187746a523285928aa07bf14803178dc04616ac85994Eli Friedman switch (E->getCastKind()) { 187846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_BaseToDerived: 187946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_DerivedToBase: 188046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_UncheckedDerivedToBase: 188146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_Dynamic: 188246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ToUnion: 188346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ArrayToPointerDecay: 188446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FunctionToPointerDecay: 188546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_NullToPointer: 188646a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_NullToMemberPointer: 188746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_BaseToDerivedMemberPointer: 188846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_DerivedToBaseMemberPointer: 188946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ConstructorConversion: 189046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralToPointer: 189146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ToVoid: 189246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_VectorSplat: 189346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralToFloating: 189446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingCast: 18951d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_CPointerToObjCPointerCast: 18961d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_BlockPointerToObjCPointerCast: 189746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_AnyPointerToBlockPointerCast: 189846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_ObjCObjectLValueCast: 189946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingRealToComplex: 190046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexToReal: 190146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexCast: 190246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexToIntegralComplex: 190346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralRealToComplex: 190446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexCast: 190546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexToFloatingComplex: 190646a523285928aa07bf14803178dc04616ac85994Eli Friedman llvm_unreachable("invalid cast kind for integral value"); 190746a523285928aa07bf14803178dc04616ac85994Eli Friedman 1908e50c297f92914ca996deb8b597624193273b62e4Eli Friedman case CK_BitCast: 190946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_Dependent: 191046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_GetObjCProperty: 191146a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_LValueBitCast: 191246a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_UserDefinedConversion: 191333e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCProduceObject: 191433e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCConsumeObject: 191533e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCReclaimReturnedObject: 191633e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCExtendBlockObject: 191746a523285928aa07bf14803178dc04616ac85994Eli Friedman return false; 191846a523285928aa07bf14803178dc04616ac85994Eli Friedman 191946a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_LValueToRValue: 192046a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_NoOp: 192146a523285928aa07bf14803178dc04616ac85994Eli Friedman return Visit(E->getSubExpr()); 192246a523285928aa07bf14803178dc04616ac85994Eli Friedman 192346a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_MemberPointerToBoolean: 192446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_PointerToBoolean: 192546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralToBoolean: 192646a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingToBoolean: 192746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingComplexToBoolean: 192846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexToBoolean: { 19294efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 19304efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(SubExpr, BoolResult, Info)) 19314efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1932131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(BoolResult, E); 19334efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 19344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 193546a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralCast: { 1936732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!Visit(SubExpr)) 1937b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1938a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1939be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!Result.isInt()) { 1940be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // Only allow casts of lvalues if they are lossless. 1941be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return Info.Ctx.getTypeSize(DestType) == Info.Ctx.getTypeSize(SrcType); 1942be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 194330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 1944dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, 194530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt(), Info.Ctx), E); 1946732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner } 19471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 194846a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_PointerToIntegral: { 1949efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 195087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(SubExpr, LV, Info)) 1951b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 19524efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1953dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (LV.getLValueBase()) { 1954dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar // Only allow based lvalue casts if they are lossless. 1955dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(SrcType)) 1956dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return false; 1957dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar 1958efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result); 1959dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return true; 1960dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar } 19614efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1962a73058324197b7bdfd19307965954f626e26199dKen Dyck APSInt AsInt = Info.Ctx.MakeIntValue(LV.getLValueOffset().getQuantity(), 1963a73058324197b7bdfd19307965954f626e26199dKen Dyck SrcType); 1964dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, AsInt, Info.Ctx), E); 19652bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 19664efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 196746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_IntegralComplexToReal: { 1968f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue C; 19691725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (!EvaluateComplex(SubExpr, C, Info)) 19701725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return false; 197146a523285928aa07bf14803178dc04616ac85994Eli Friedman return Success(C.getComplexIntReal(), E); 19721725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 19732217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 197446a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_FloatingToIntegral: { 197546a523285928aa07bf14803178dc04616ac85994Eli Friedman APFloat F(0.0); 197646a523285928aa07bf14803178dc04616ac85994Eli Friedman if (!EvaluateFloat(SubExpr, F, Info)) 197746a523285928aa07bf14803178dc04616ac85994Eli Friedman return false; 1978732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 197946a523285928aa07bf14803178dc04616ac85994Eli Friedman return Success(HandleFloatToIntCast(DestType, SrcType, F, Info.Ctx), E); 198046a523285928aa07bf14803178dc04616ac85994Eli Friedman } 198146a523285928aa07bf14803178dc04616ac85994Eli Friedman } 19821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 198346a523285928aa07bf14803178dc04616ac85994Eli Friedman llvm_unreachable("unknown cast resulting in integral value"); 198446a523285928aa07bf14803178dc04616ac85994Eli Friedman return false; 1985a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 19862bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 1987722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedmanbool IntExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 1988722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 1989f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 1990722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1991722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1992722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntReal(), E); 1993722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1994722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1995722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Visit(E->getSubExpr()); 1996722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman} 1997722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1998664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedmanbool IntExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 1999722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isComplexIntegerType()) { 2000f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 2001722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 2002722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 2003722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntImag(), E); 2004722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 2005722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 20068327fad71da34492d82c532f42a58cb4baff81a3Richard Smith VisitIgnoredValue(E->getSubExpr()); 2007664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 2008664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman} 2009664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 2010ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregorbool IntExprEvaluator::VisitSizeOfPackExpr(const SizeOfPackExpr *E) { 2011ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor return Success(E->getPackLength(), E); 2012ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor} 2013ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor 2014295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redlbool IntExprEvaluator::VisitCXXNoexceptExpr(const CXXNoexceptExpr *E) { 2015295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl return Success(E->getValue(), E); 2016295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl} 2017295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl 2018f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 2019d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman// Float Evaluation 2020d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 2021d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 2022d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmannamespace { 2023770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass FloatExprEvaluator 20248cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<FloatExprEvaluator, bool> { 2025d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat &Result; 2026d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanpublic: 2027d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman FloatExprEvaluator(EvalInfo &info, APFloat &result) 20288cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(result) {} 2029d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 20308cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const APValue &V, const Expr *e) { 20318cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result = V.getFloat(); 20328cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 20338cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 20348cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Error(const Stmt *S) { 2035d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 2036d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 2037d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 2038f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith bool ValueInitialization(const Expr *E) { 2039f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith Result = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(E->getType())); 2040f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith return true; 2041f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith } 2042f10d9171ac24380ca94c71847a9270a05b791cefRichard Smith 2043019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner bool VisitCallExpr(const CallExpr *E); 2044d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 20455db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar bool VisitUnaryOperator(const UnaryOperator *E); 2046d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 2047d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitFloatingLiteral(const FloatingLiteral *E); 20488cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E); 20492217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 2050abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryReal(const UnaryOperator *E); 2051abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryImag(const UnaryOperator *E); 2052ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 2053189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall bool VisitDeclRefExpr(const DeclRefExpr *E); 2054189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 2055abd3a857ace59100305790545d1baae5877b8945John McCall // FIXME: Missing: array subscript of vector, member of vector, 2056abd3a857ace59100305790545d1baae5877b8945John McCall // ImplicitValueInitExpr 2057d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman}; 2058d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} // end anonymous namespace 2059d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 2060d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) { 20617db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall assert(E->getType()->isRealFloatingType()); 20628cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return FloatExprEvaluator(Info, Result).Visit(E); 2063d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 2064d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 20654ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadstatic bool TryEvaluateBuiltinNaN(const ASTContext &Context, 2066db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall QualType ResultTy, 2067db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const Expr *Arg, 2068db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall bool SNaN, 2069db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APFloat &Result) { 2070db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const StringLiteral *S = dyn_cast<StringLiteral>(Arg->IgnoreParenCasts()); 2071db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (!S) return false; 2072db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 2073db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const llvm::fltSemantics &Sem = Context.getFloatTypeSemantics(ResultTy); 2074db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 2075db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APInt fill; 2076db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 2077db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall // Treat empty strings as if they were zero. 2078db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (S->getString().empty()) 2079db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall fill = llvm::APInt(32, 0); 2080db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else if (S->getString().getAsInteger(0, fill)) 2081db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return false; 2082db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 2083db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (SNaN) 2084db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getSNaN(Sem, false, &fill); 2085db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else 2086db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getQNaN(Sem, false, &fill); 2087db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return true; 2088db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall} 2089db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 2090019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattnerbool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) { 20913c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 20928cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne default: 20938cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ExprEvaluatorBaseTy::VisitCallExpr(E); 20948cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 2095019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_val: 2096019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_valf: 2097019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_vall: 2098019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inf: 2099019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inff: 21007cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar case Builtin::BI__builtin_infl: { 21017cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 21027cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 210334a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner Result = llvm::APFloat::getInf(Sem); 210434a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner return true; 21057cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar } 21061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2107db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nans: 2108db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansf: 2109db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansl: 2110db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 2111db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall true, Result); 2112db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 21139e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nan: 21149e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanf: 21159e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanl: 21164572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump // If this is __builtin_nan() turn this into a nan, otherwise we 21179e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // can't constant fold it. 2118db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 2119db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall false, Result); 21205db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 21215db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabs: 21225db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsf: 21235db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsl: 21245db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info)) 21255db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 21261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21275db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (Result.isNegative()) 21285db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 21295db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 21305db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 21311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysign: 21321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysignf: 21335db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignl: { 21345db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.); 21355db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info) || 21365db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar !EvaluateFloat(E->getArg(1), RHS, Info)) 21375db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 21385db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.copySign(RHS); 21395db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 21405db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 2141019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 2142019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner} 2143019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 2144189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCallbool FloatExprEvaluator::VisitDeclRefExpr(const DeclRefExpr *E) { 21458cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne if (ExprEvaluatorBaseTy::VisitDeclRefExpr(E)) 21468cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 21478cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne 214803f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith const VarDecl *VD = dyn_cast<VarDecl>(E->getDecl()); 214903f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith if (VD && IsConstNonVolatile(VD->getType())) { 215003f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith APValue *V = EvaluateVarDeclInit(Info, VD); 215103f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith if (V && V->isFloat()) { 2152189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall Result = V->getFloat(); 2153189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return true; 2154189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall } 2155189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall } 2156189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 2157189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall} 2158189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 2159abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 216043efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 216143efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman ComplexValue CV; 216243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 216343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return false; 216443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = CV.FloatReal; 216543efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return true; 216643efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman } 216743efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman 216843efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return Visit(E->getSubExpr()); 2169abd3a857ace59100305790545d1baae5877b8945John McCall} 2170abd3a857ace59100305790545d1baae5877b8945John McCall 2171abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 217243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 217343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman ComplexValue CV; 217443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 217543efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return false; 217643efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = CV.FloatImag; 217743efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return true; 217843efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman } 217943efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman 21808327fad71da34492d82c532f42a58cb4baff81a3Richard Smith VisitIgnoredValue(E->getSubExpr()); 218143efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman const llvm::fltSemantics &Sem = Info.Ctx.getFloatTypeSemantics(E->getType()); 218243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = llvm::APFloat::getZero(Sem); 2183abd3a857ace59100305790545d1baae5877b8945John McCall return true; 2184abd3a857ace59100305790545d1baae5877b8945John McCall} 2185abd3a857ace59100305790545d1baae5877b8945John McCall 21865db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbarbool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 21872de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == UO_Deref) 2188a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes return false; 2189a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes 21905db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getSubExpr(), Result, Info)) 21915db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 21925db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 21935db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar switch (E->getOpcode()) { 21945db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar default: return false; 21952de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 21965db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 21972de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 21985db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 21995db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 22005db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 22015db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar} 2202019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 2203d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 22042de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Comma) { 22058327fad71da34492d82c532f42a58cb4baff81a3Richard Smith VisitIgnoredValue(E->getLHS()); 22068327fad71da34492d82c532f42a58cb4baff81a3Richard Smith return Visit(E->getRHS()); 22077f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman } 22087f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 220996e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson // We can't evaluate pointer-to-member operations. 221096e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson if (E->isPtrMemOp()) 221196e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson return false; 221296e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson 2213d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // FIXME: Diagnostics? I really don't understand how the warnings 2214d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // and errors are supposed to work. 22155db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.0); 2216d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getLHS(), Result, Info)) 2217d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 2218d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getRHS(), RHS, Info)) 2219d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 2220d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 2221d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman switch (E->getOpcode()) { 2222d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman default: return false; 22232de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 2224d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.multiply(RHS, APFloat::rmNearestTiesToEven); 2225d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 22262de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 2227d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.add(RHS, APFloat::rmNearestTiesToEven); 2228d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 22292de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 2230d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.subtract(RHS, APFloat::rmNearestTiesToEven); 2231d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 22322de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 2233d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.divide(RHS, APFloat::rmNearestTiesToEven); 2234d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 2235d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 2236d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 2237d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 2238d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) { 2239d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result = E->getValue(); 2240d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 2241d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 2242d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 22438cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool FloatExprEvaluator::VisitCastExpr(const CastExpr *E) { 22448cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr* SubExpr = E->getSubExpr(); 22451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22462a523eec6a31955be876625819b89e8dc5def707Eli Friedman switch (E->getCastKind()) { 22472a523eec6a31955be876625819b89e8dc5def707Eli Friedman default: 22482a523eec6a31955be876625819b89e8dc5def707Eli Friedman return false; 22492a523eec6a31955be876625819b89e8dc5def707Eli Friedman 22502a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_LValueToRValue: 22512a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_NoOp: 22522a523eec6a31955be876625819b89e8dc5def707Eli Friedman return Visit(SubExpr); 22532a523eec6a31955be876625819b89e8dc5def707Eli Friedman 22542a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_IntegralToFloating: { 22554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 22563f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!EvaluateInteger(SubExpr, IntResult, Info)) 22574efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 22581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result = HandleIntToFloatCast(E->getType(), SubExpr->getType(), 2259a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar IntResult, Info.Ctx); 22604efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 22614efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 22622a523eec6a31955be876625819b89e8dc5def707Eli Friedman 22632a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_FloatingCast: { 22644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!Visit(SubExpr)) 22654efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 2266a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(E->getType(), SubExpr->getType(), 2267a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result, Info.Ctx); 22684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 22694efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2270f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall 22712a523eec6a31955be876625819b89e8dc5def707Eli Friedman case CK_FloatingComplexToReal: { 2272f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall ComplexValue V; 2273f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall if (!EvaluateComplex(SubExpr, V, Info)) 2274f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall return false; 2275f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall Result = V.getComplexFloatReal(); 2276f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall return true; 2277f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall } 22782a523eec6a31955be876625819b89e8dc5def707Eli Friedman } 22794efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 22804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 22814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 22824efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2283d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 2284a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar// Complex Evaluation (for float and integer) 22859ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 22869ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 22879ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonnamespace { 2288770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass ComplexExprEvaluator 22898cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : public ExprEvaluatorBase<ComplexExprEvaluator, bool> { 2290f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue &Result; 22911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22929ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonpublic: 2293f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexExprEvaluator(EvalInfo &info, ComplexValue &Result) 22948cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne : ExprEvaluatorBaseTy(info), Result(Result) {} 22951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22968cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Success(const APValue &V, const Expr *e) { 22978cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne Result.setFrom(V); 22988cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return true; 22998cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne } 23008cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool Error(const Expr *E) { 2301f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 23029ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 23031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23048cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 23058cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne // Visitor Methods 23068cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne //===--------------------------------------------------------------------===// 23079ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 23088cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitImaginaryLiteral(const ImaginaryLiteral *E); 2309a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 23108cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne bool VisitCastExpr(const CastExpr *E); 2311b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2312b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 231396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara bool VisitUnaryOperator(const UnaryOperator *E); 2314cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl // FIXME Missing: ImplicitValueInitExpr, InitListExpr 2315b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman}; 2316b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} // end anonymous namespace 23171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2318b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedmanstatic bool EvaluateComplex(const Expr *E, ComplexValue &Result, 2319b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman EvalInfo &Info) { 2320b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman assert(E->getType()->isAnyComplexType()); 23218cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne return ComplexExprEvaluator(Info, Result).Visit(E); 2322b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} 2323b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 23248cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool ComplexExprEvaluator::VisitImaginaryLiteral(const ImaginaryLiteral *E) { 23258cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbourne const Expr* SubExpr = E->getSubExpr(); 2326b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2327b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (SubExpr->getType()->isRealFloatingType()) { 2328b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexFloat(); 2329b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APFloat &Imag = Result.FloatImag; 2330b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateFloat(SubExpr, Imag, Info)) 2331b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2332b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2333b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatReal = APFloat(Imag.getSemantics()); 2334b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 2335b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } else { 2336b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman assert(SubExpr->getType()->isIntegerType() && 2337b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman "Unexpected imaginary literal."); 2338b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2339b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexInt(); 2340b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APSInt &Imag = Result.IntImag; 2341b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateInteger(SubExpr, Imag, Info)) 2342b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2343b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2344b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntReal = APSInt(Imag.getBitWidth(), !Imag.isSigned()); 2345b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 2346b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } 2347b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} 2348b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 23498cad3046be06ea73ff8892d947697a21d7a440d3Peter Collingbournebool ComplexExprEvaluator::VisitCastExpr(const CastExpr *E) { 2350b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 23518786da77984e81d48e0e1b2bd339809b1efc19f3John McCall switch (E->getCastKind()) { 23528786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BitCast: 23538786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BaseToDerived: 23548786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_DerivedToBase: 23558786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_UncheckedDerivedToBase: 23568786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_Dynamic: 23578786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ToUnion: 23588786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ArrayToPointerDecay: 23598786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FunctionToPointerDecay: 23608786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NullToPointer: 23618786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NullToMemberPointer: 23628786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BaseToDerivedMemberPointer: 23638786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_DerivedToBaseMemberPointer: 23648786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_MemberPointerToBoolean: 23658786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ConstructorConversion: 23668786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToPointer: 23678786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_PointerToIntegral: 23688786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_PointerToBoolean: 23698786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ToVoid: 23708786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_VectorSplat: 23718786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralCast: 23728786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToBoolean: 23738786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToFloating: 23748786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingToIntegral: 23758786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingToBoolean: 23768786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingCast: 23771d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_CPointerToObjCPointerCast: 23781d9b3b25f7ac0d0195bba6b507a684fe5e7943eeJohn McCall case CK_BlockPointerToObjCPointerCast: 23798786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_AnyPointerToBlockPointerCast: 23808786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ObjCObjectLValueCast: 23818786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToReal: 23828786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToBoolean: 23838786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToReal: 23848786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToBoolean: 238533e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCProduceObject: 238633e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCConsumeObject: 238733e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCReclaimReturnedObject: 238833e56f3273457bfa22c7c50bc46cf5a18216863dJohn McCall case CK_ARCExtendBlockObject: 23898786da77984e81d48e0e1b2bd339809b1efc19f3John McCall llvm_unreachable("invalid cast kind for complex value"); 23908786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 23918786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_LValueToRValue: 23928786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NoOp: 23938786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return Visit(E->getSubExpr()); 23942bb5d00fcf71a7b4d478d478be778fff0494aff6John McCall 23958786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_Dependent: 23968786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_GetObjCProperty: 239746a523285928aa07bf14803178dc04616ac85994Eli Friedman case CK_LValueBitCast: 23988786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_UserDefinedConversion: 23998786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 24008786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 24018786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingRealToComplex: { 2402b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APFloat &Real = Result.FloatReal; 24038786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!EvaluateFloat(E->getSubExpr(), Real, Info)) 2404b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2405b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 24068786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexFloat(); 24078786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatImag = APFloat(Real.getSemantics()); 24088786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 24098786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 24108786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 24118786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexCast: { 24128786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 24138786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 24148786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 24158786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 24168786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 24178786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 24188786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 24198786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatReal 24208786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = HandleFloatToFloatCast(To, From, Result.FloatReal, Info.Ctx); 24218786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatImag 24228786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = HandleFloatToFloatCast(To, From, Result.FloatImag, Info.Ctx); 24238786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 24248786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 24258786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 24268786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToIntegralComplex: { 24278786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 24288786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 24298786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 24308786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 24318786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 24328786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 24338786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexInt(); 24348786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntReal = HandleFloatToIntCast(To, From, Result.FloatReal, Info.Ctx); 24358786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntImag = HandleFloatToIntCast(To, From, Result.FloatImag, Info.Ctx); 24368786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 24378786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 24388786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 24398786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralRealToComplex: { 2440b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APSInt &Real = Result.IntReal; 24418786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!EvaluateInteger(E->getSubExpr(), Real, Info)) 2442b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 24439ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 24448786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexInt(); 24458786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntImag = APSInt(Real.getBitWidth(), !Real.isSigned()); 24468786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 24478786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 24488786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 24498786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexCast: { 24508786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 2451b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2452ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 24538786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 24548786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 24558786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 24561725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 24578786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntReal = HandleIntToIntCast(To, From, Result.IntReal, Info.Ctx); 24588786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntImag = HandleIntToIntCast(To, From, Result.IntImag, Info.Ctx); 24598786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 24608786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 24618786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 24628786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToFloatingComplex: { 24638786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 24648786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 24658786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 24668786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 24678786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 24688786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 24698786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexFloat(); 24708786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatReal = HandleIntToFloatCast(To, From, Result.IntReal, Info.Ctx); 24718786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatImag = HandleIntToFloatCast(To, From, Result.IntImag, Info.Ctx); 24728786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 24738786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 2474ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 24751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 24768786da77984e81d48e0e1b2bd339809b1efc19f3John McCall llvm_unreachable("unknown cast resulting in complex value"); 2477b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 24789ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} 24799ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2480f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallbool ComplexExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 248196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (E->getOpcode() == BO_Comma) { 24828327fad71da34492d82c532f42a58cb4baff81a3Richard Smith VisitIgnoredValue(E->getLHS()); 24838327fad71da34492d82c532f42a58cb4baff81a3Richard Smith return Visit(E->getRHS()); 248496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 2485f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (!Visit(E->getLHS())) 2486f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 24871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2488f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue RHS; 2489a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 2490f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 2491a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 24923f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar assert(Result.isComplexFloat() == RHS.isComplexFloat() && 24933f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar "Invalid operands to binary operator."); 2494ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson switch (E->getOpcode()) { 2495f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall default: return false; 24962de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 2497a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 2498a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().add(RHS.getComplexFloatReal(), 2499a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2500a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().add(RHS.getComplexFloatImag(), 2501a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2502a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 2503a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() += RHS.getComplexIntReal(); 2504a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() += RHS.getComplexIntImag(); 2505a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 25063f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 25072de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 2508a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 2509a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().subtract(RHS.getComplexFloatReal(), 2510a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2511a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().subtract(RHS.getComplexFloatImag(), 2512a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2513a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 2514a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() -= RHS.getComplexIntReal(); 2515a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() -= RHS.getComplexIntImag(); 2516a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 25173f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 25182de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 25193f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar if (Result.isComplexFloat()) { 2520f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 25213f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_r = LHS.getComplexFloatReal(); 25223f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_i = LHS.getComplexFloatImag(); 25233f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_r = RHS.getComplexFloatReal(); 25243f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_i = RHS.getComplexFloatImag(); 25251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 25263f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat Tmp = LHS_r; 25273f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 25283f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal() = Tmp; 25293f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 25303f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 25313f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal().subtract(Tmp, APFloat::rmNearestTiesToEven); 25323f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 25333f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_r; 25343f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 25353f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag() = Tmp; 25363f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 25373f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 25383f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag().add(Tmp, APFloat::rmNearestTiesToEven); 25393f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } else { 2540f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 25411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntReal() = 25423f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntReal() - 25433f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntImag()); 25441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntImag() = 25453f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntImag() + 25463f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntReal()); 25473f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } 25483f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 254996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case BO_Div: 255096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) { 255196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara ComplexValue LHS = Result; 255296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &LHS_r = LHS.getComplexFloatReal(); 255396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &LHS_i = LHS.getComplexFloatImag(); 255496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &RHS_r = RHS.getComplexFloatReal(); 255596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &RHS_i = RHS.getComplexFloatImag(); 255696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &Res_r = Result.getComplexFloatReal(); 255796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &Res_i = Result.getComplexFloatImag(); 255896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 255996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat Den = RHS_r; 256096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Den.multiply(RHS_r, APFloat::rmNearestTiesToEven); 256196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat Tmp = RHS_i; 256296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 256396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Den.add(Tmp, APFloat::rmNearestTiesToEven); 256496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 256596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r = LHS_r; 256696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.multiply(RHS_r, APFloat::rmNearestTiesToEven); 256796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp = LHS_i; 256896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 256996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.add(Tmp, APFloat::rmNearestTiesToEven); 257096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.divide(Den, APFloat::rmNearestTiesToEven); 257196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 257296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i = LHS_i; 257396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.multiply(RHS_r, APFloat::rmNearestTiesToEven); 257496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp = LHS_r; 257596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 257696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.subtract(Tmp, APFloat::rmNearestTiesToEven); 257796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.divide(Den, APFloat::rmNearestTiesToEven); 257896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } else { 257996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (RHS.getComplexIntReal() == 0 && RHS.getComplexIntImag() == 0) { 258096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // FIXME: what about diagnostics? 258196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 258296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 258396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara ComplexValue LHS = Result; 258496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APSInt Den = RHS.getComplexIntReal() * RHS.getComplexIntReal() + 258596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara RHS.getComplexIntImag() * RHS.getComplexIntImag(); 258696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntReal() = 258796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara (LHS.getComplexIntReal() * RHS.getComplexIntReal() + 258896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara LHS.getComplexIntImag() * RHS.getComplexIntImag()) / Den; 258996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = 259096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara (LHS.getComplexIntImag() * RHS.getComplexIntReal() - 259196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara LHS.getComplexIntReal() * RHS.getComplexIntImag()) / Den; 259296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 259396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara break; 2594ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 2595ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 2596f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2597ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson} 2598ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 259996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnarabool ComplexExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 260096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // Get the operand value into 'Result'. 260196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (!Visit(E->getSubExpr())) 260296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 260396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 260496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara switch (E->getOpcode()) { 260596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara default: 260696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // FIXME: what about diagnostics? 260796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 260896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Extension: 260996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 261096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Plus: 261196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // The result is always just the subexpr. 261296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 261396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Minus: 261496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) { 261596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatReal().changeSign(); 261696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatImag().changeSign(); 261796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 261896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara else { 261996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntReal() = -Result.getComplexIntReal(); 262096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = -Result.getComplexIntImag(); 262196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 262296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 262396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Not: 262496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) 262596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatImag().changeSign(); 262696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara else 262796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = -Result.getComplexIntImag(); 262896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 262996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 263096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara} 263196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 26329ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 26336ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner// Top level Expr::Evaluate method. 2634f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 2635f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 26361e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smithstatic bool Evaluate(APValue &Result, EvalInfo &Info, const Expr *E) { 2637efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (E->getType()->isVectorType()) { 26381e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (!EvaluateVector(E, Result, Info)) 263959b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 2640575a1c9dc8dc5b4977194993e289f9eda7295c39Douglas Gregor } else if (E->getType()->isIntegralOrEnumerationType()) { 26411e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (!IntExprEvaluator(Info, Result).Visit(E)) 26426dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 26431e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith if (Result.isLValue() && 26441e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith !IsGlobalLValue(Result.getLValueBase())) 26450f2b692bb10be35fdc60d0a72a847bdd73124670John McCall return false; 2646efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->hasPointerRepresentation()) { 2647efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 2648efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(E, LV, Info)) 26496dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 2650e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (!IsGlobalLValue(LV.Base)) 265142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 26521e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith LV.moveInto(Result); 2653efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isRealFloatingType()) { 2654efdb83e26f9a1fd2566afe54461216cd84814d42John McCall llvm::APFloat F(0.0); 2655efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateFloat(E, F, Info)) 26566dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 26571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 26581e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith Result = APValue(F); 2659efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isAnyComplexType()) { 2660efdb83e26f9a1fd2566afe54461216cd84814d42John McCall ComplexValue C; 2661efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateComplex(E, C, Info)) 2662660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 26631e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith C.moveInto(Result); 2664660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else 2665660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 2666660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 2667660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return true; 2668660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump} 2669660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 267056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall/// Evaluate - Return true if this is a constant which we can fold using 267156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall/// any crazy technique (that has nothing to do with language standards) that 267256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall/// we want to. If this function returns true, it returns the folded constant 267356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall/// in Result. 267456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCallbool Expr::Evaluate(EvalResult &Result, const ASTContext &Ctx) const { 267556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall EvalInfo Info(Ctx, Result); 26761e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith return ::Evaluate(Result.Val, Info, this); 267756ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall} 267856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall 26794ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::EvaluateAsBooleanCondition(bool &Result, 26804ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad const ASTContext &Ctx) const { 26811e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith EvalStatus Scratch; 2682cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalInfo Info(Ctx, Scratch); 2683cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall 2684cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall return HandleConversionToBool(this, Result, Info); 2685cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall} 2686cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall 2687a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smithbool Expr::EvaluateAsInt(APSInt &Result, const ASTContext &Ctx) const { 26881e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith EvalStatus Scratch; 2689a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith EvalInfo Info(Ctx, Scratch); 2690a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith 2691a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith return EvaluateInteger(this, Result, Info) && !Scratch.HasSideEffects; 2692a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith} 2693a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith 26944ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::EvaluateAsLValue(EvalResult &Result, const ASTContext &Ctx) const { 26951b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson EvalInfo Info(Ctx, Result); 26961b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 2697efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 269842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (EvaluateLValue(this, LV, Info) && 269942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall !Result.HasSideEffects && 2700e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara IsGlobalLValue(LV.Base)) { 2701e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara LV.moveInto(Result.Val); 2702e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return true; 2703e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara } 2704e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return false; 2705e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara} 2706e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 27074ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::EvaluateAsAnyLValue(EvalResult &Result, 27084ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foad const ASTContext &Ctx) const { 2709e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara EvalInfo Info(Ctx, Result); 2710e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2711e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara LValue LV; 2712e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (EvaluateLValue(this, LV, Info)) { 2713efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result.Val); 2714efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 2715efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 2716efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 2717b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman} 2718b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 27196ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// isEvaluatable - Call Evaluate to see if this expression can be constant 272045b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner/// folded, but discard the result. 27214ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::isEvaluatable(const ASTContext &Ctx) const { 27224fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson EvalResult Result; 27234fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects; 272445b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner} 272551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 27264ba2a17694148e16eaa8d3917f657ffcd3667be4Jay Foadbool Expr::HasSideEffects(const ASTContext &Ctx) const { 27271e12c59e8f9bb76c23628c4e0d0a1dfced0b1fa0Richard Smith return HasSideEffect(Ctx).Visit(this); 2728393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian} 2729393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian 2730a6b8b2c09610b8bc4330e948ece8b940c2386406Richard SmithAPSInt Expr::EvaluateKnownConstInt(const ASTContext &Ctx) const { 27311c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 27321c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson bool Result = Evaluate(EvalResult, Ctx); 2733c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)Result; 273451fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson assert(Result && "Could not evaluate expression"); 27351c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(EvalResult.Val.isInt() && "Expression did not evaluate to integer"); 273651fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 27371c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson return EvalResult.Val.getInt(); 273851fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson} 2739d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2740e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara bool Expr::EvalResult::isGlobalLValue() const { 2741e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara assert(Val.isLValue()); 2742e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return IsGlobalLValue(Val.getLValueBase()); 2743e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara } 2744e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2745e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2746d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// isIntegerConstantExpr - this recursive routine will test if an expression is 2747d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// an integer constant expression. 2748d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2749d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Pass up a reason why! Invalid operation in i-c-e, division by zero, 2750d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// comma, etc 2751d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// 2752d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Handle offsetof. Two things to do: Handle GCC's __builtin_offsetof 2753d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// to support gcc 4.0+ and handle the idiom GCC recognizes with a null pointer 2754d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// cast+dereference. 2755d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2756d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// CheckICE - This function does the fundamental ICE checking: the returned 2757d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// ICEDiag contains a Val of 0, 1, or 2, and a possibly null SourceLocation. 2758d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Note that to reduce code duplication, this helper does no evaluation 2759d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// itself; the caller checks whether the expression is evaluatable, and 2760d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// in the rare cases where CheckICE actually cares about the evaluated 2761d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// value, it calls into Evalute. 2762d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 2763d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Meanings of Val: 2764d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 0: This expression is an ICE if it can be evaluated by Evaluate. 2765d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 1: This expression is not an ICE, but if it isn't evaluated, it's 2766d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// a legal subexpression for an ICE. This return value is used to handle 2767d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// the comma operator in C99 mode. 2768d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 2: This expression is not an ICE, and is not a legal subexpression for one. 2769d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 27703c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 27713c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 2772d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstruct ICEDiag { 2773d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall unsigned Val; 2774d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall SourceLocation Loc; 2775d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2776d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall public: 2777d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag(unsigned v, SourceLocation l) : Val(v), Loc(l) {} 2778d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag() : Val(0) {} 2779d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall}; 2780d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 27813c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 27823c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 27833c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmanstatic ICEDiag NoDiag() { return ICEDiag(); } 2784d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2785d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckEvalInICE(const Expr* E, ASTContext &Ctx) { 2786d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 2787d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!E->Evaluate(EVResult, Ctx) || EVResult.HasSideEffects || 2788d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 2789d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2790d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2791d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2792d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 2793d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2794d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckICE(const Expr* E, ASTContext &Ctx) { 2795d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(!E->isValueDependent() && "Should not see value dependent exprs!"); 27962ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!E->getType()->isIntegralOrEnumerationType()) { 2797d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2798d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2799d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2800d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (E->getStmtClass()) { 280163c00d7f35fa060c0a446c9df3a4402d9c7757feJohn McCall#define ABSTRACT_STMT(Node) 2802d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define STMT(Node, Base) case Expr::Node##Class: 2803d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define EXPR(Node, Base) 2804d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#include "clang/AST/StmtNodes.inc" 2805d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::PredefinedExprClass: 2806d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::FloatingLiteralClass: 2807d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImaginaryLiteralClass: 2808d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StringLiteralClass: 2809d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ArraySubscriptExprClass: 2810d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::MemberExprClass: 2811d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundAssignOperatorClass: 2812d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundLiteralExprClass: 2813d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ExtVectorElementExprClass: 2814d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DesignatedInitExprClass: 2815d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitValueInitExprClass: 2816d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenListExprClass: 2817d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::VAArgExprClass: 2818d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::AddrLabelExprClass: 2819d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StmtExprClass: 2820d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXMemberCallExprClass: 2821e08ce650a2b02410eddd1f60a4aa6b3d4be71e73Peter Collingbourne case Expr::CUDAKernelCallExprClass: 2822d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDynamicCastExprClass: 2823d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTypeidExprClass: 28249be88403e965cc49af76c9d33d818781d44b333eFrancois Pichet case Expr::CXXUuidofExprClass: 2825d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNullPtrLiteralExprClass: 2826d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThisExprClass: 2827d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThrowExprClass: 2828d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNewExprClass: 2829d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDeleteExprClass: 2830d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXPseudoDestructorExprClass: 2831d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedLookupExprClass: 2832d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DependentScopeDeclRefExprClass: 2833d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXConstructExprClass: 2834d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBindTemporaryExprClass: 28354765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall case Expr::ExprWithCleanupsClass: 2836d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTemporaryObjectExprClass: 2837d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXUnresolvedConstructExprClass: 2838d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDependentScopeMemberExprClass: 2839d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedMemberExprClass: 2840d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCStringLiteralClass: 2841d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCEncodeExprClass: 2842d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCMessageExprClass: 2843d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCSelectorExprClass: 2844d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCProtocolExprClass: 2845d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIvarRefExprClass: 2846d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCPropertyRefExprClass: 2847d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIsaExprClass: 2848d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ShuffleVectorExprClass: 2849d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockExprClass: 2850d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockDeclRefExprClass: 2851d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::NoStmtClass: 28527cd7d1ad33fdf49eef83942e8855fe20d95aa1b9John McCall case Expr::OpaqueValueExprClass: 2853be230c36e32142cbdcdbe9c97511d097beeecbabDouglas Gregor case Expr::PackExpansionExprClass: 2854c7793c73ba8a343de3f2552d984851985a46f159Douglas Gregor case Expr::SubstNonTypeTemplateParmPackExprClass: 285561eee0ca33b29e102f11bab77c8b74cc00e2392bTanya Lattner case Expr::AsTypeExprClass: 2856f85e193739c953358c865005855253af4f68a497John McCall case Expr::ObjCIndirectCopyRestoreExprClass: 285703e80030515c800d1ab44125b9052dfffd1bd04cDouglas Gregor case Expr::MaterializeTemporaryExprClass: 2858276b061970939293f1abaf694bd3ef05b2cbda79Eli Friedman case Expr::AtomicExprClass: 2859d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2860d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2861cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl case Expr::InitListExprClass: 2862cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl if (Ctx.getLangOptions().CPlusPlus0x) { 2863cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl const InitListExpr *ILE = cast<InitListExpr>(E); 2864cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl if (ILE->getNumInits() == 0) 2865cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl return NoDiag(); 2866cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl if (ILE->getNumInits() == 1) 2867cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl return CheckICE(ILE->getInit(0), Ctx); 2868cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl // Fall through for more than 1 expression. 2869cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl } 2870cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl return ICEDiag(2, E->getLocStart()); 2871cea8d966f826554f0679595e9371e314e8dbc1cfSebastian Redl 2872ee8aff06f6a96214731de17b2cb6df407c6c1820Douglas Gregor case Expr::SizeOfPackExprClass: 2873d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::GNUNullExprClass: 2874d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // GCC considers the GNU __null value to be an integral constant expression. 2875d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2876d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 287791a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall case Expr::SubstNonTypeTemplateParmExprClass: 287891a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall return 287991a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall CheckICE(cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement(), Ctx); 288091a5755ad73c5dc1dfb167e448fdd74e75a6df56John McCall 2881d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenExprClass: 2882d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ParenExpr>(E)->getSubExpr(), Ctx); 2883f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne case Expr::GenericSelectionExprClass: 2884f111d935722ed488144600cea5ed03a6b5069e8fPeter Collingbourne return CheckICE(cast<GenericSelectionExpr>(E)->getResultExpr(), Ctx); 2885d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::IntegerLiteralClass: 2886d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CharacterLiteralClass: 2887d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBoolLiteralExprClass: 2888ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor case Expr::CXXScalarValueInitExprClass: 2889d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryTypeTraitExprClass: 28906ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet case Expr::BinaryTypeTraitExprClass: 289121ff2e516b0e0bc8c1dbf965cb3d44bac3c64330John Wiegley case Expr::ArrayTypeTraitExprClass: 2892552622067dc45013d240f73952fece703f5e63bdJohn Wiegley case Expr::ExpressionTraitExprClass: 28932e156225a29407a50dd19041aa5750171ad44ea3Sebastian Redl case Expr::CXXNoexceptExprClass: 2894d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2895d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CallExprClass: 28966cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt case Expr::CXXOperatorCallExprClass: { 2897d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const CallExpr *CE = cast<CallExpr>(E); 2898d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CE->isBuiltinCall(Ctx)) 2899d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 2900d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2901d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2902d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DeclRefExprClass: 2903d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<EnumConstantDecl>(cast<DeclRefExpr>(E)->getDecl())) 2904d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 290503f96110bc2c2c773e06a42982b17a03dd2e5379Richard Smith if (Ctx.getLangOptions().CPlusPlus && IsConstNonVolatile(E->getType())) { 2906d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl(); 2907d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2908d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Parameter variables are never constants. Without this check, 2909d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // getAnyInitializer() can find a default argument, which leads 2910d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to chaos. 2911d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<ParmVarDecl>(D)) 2912d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2913d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2914d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C++ 7.1.5.1p2 2915d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // A variable of non-volatile const-qualified integral or enumeration 2916d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // type initialized by an ICE can be used in ICEs. 2917d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const VarDecl *Dcl = dyn_cast<VarDecl>(D)) { 2918d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Look for a declaration of this variable that has an initializer. 2919d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const VarDecl *ID = 0; 2920d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const Expr *Init = Dcl->getAnyInitializer(ID); 2921d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Init) { 2922d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (ID->isInitKnownICE()) { 2923d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // We have already checked whether this subexpression is an 2924d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // integral constant expression. 2925d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (ID->isInitICE()) 2926d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2927d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall else 2928d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2929d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2930d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2931d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // It's an ICE whether or not the definition we found is 2932d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // out-of-line. See DR 721 and the discussion in Clang PR 2933d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // 6206 for details. 2934d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2935d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Dcl->isCheckingICE()) { 2936d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2937d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2938d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2939d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Dcl->setCheckingICE(); 2940d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag Result = CheckICE(Init, Ctx); 2941d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Cache the result of the ICE test. 2942d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Dcl->setInitKnownICE(Result.Val == 0); 2943d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return Result; 2944d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2945d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2946d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2947d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2948d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryOperatorClass: { 2949d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const UnaryOperator *Exp = cast<UnaryOperator>(E); 2950d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 29512de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PostInc: 29522de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PostDec: 29532de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PreInc: 29542de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PreDec: 29552de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_AddrOf: 29562de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Deref: 2957d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 29582de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: 29592de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_LNot: 29602de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 29612de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 29622de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 29632de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Real: 29642de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Imag: 2965d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(Exp->getSubExpr(), Ctx); 2966d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2967d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2968d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // OffsetOf falls through here. 2969d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2970d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::OffsetOfExprClass: { 2971d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that per C99, offsetof must be an ICE. And AFAIK, using 2972d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Evaluate matches the proposed gcc behavior for cases like 2973d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // "offsetof(struct s{int x[4];}, x[!.0])". This doesn't affect 2974d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // compliance: we should warn earlier for offsetof expressions with 2975d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // array subscripts that aren't ICEs, and if the array subscripts 2976d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // are ICEs, the value of the offsetof must be an integer constant. 2977d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 2978d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2979f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne case Expr::UnaryExprOrTypeTraitExprClass: { 2980f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne const UnaryExprOrTypeTraitExpr *Exp = cast<UnaryExprOrTypeTraitExpr>(E); 2981f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne if ((Exp->getKind() == UETT_SizeOf) && 2982f4e3cfbe8abd124be6341ef5d714819b4fbd9082Peter Collingbourne Exp->getTypeOfArgument()->isVariableArrayType()) 2983d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2984d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2985d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2986d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BinaryOperatorClass: { 2987d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const BinaryOperator *Exp = cast<BinaryOperator>(E); 2988d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 29892de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_PtrMemD: 29902de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_PtrMemI: 29912de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Assign: 29922de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_MulAssign: 29932de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_DivAssign: 29942de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_RemAssign: 29952de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AddAssign: 29962de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_SubAssign: 29972de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShlAssign: 29982de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShrAssign: 29992de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AndAssign: 30002de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_XorAssign: 30012de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_OrAssign: 3002d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 3003d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 30042de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 30052de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 30062de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Rem: 30072de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 30082de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 30092de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shl: 30102de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shr: 30112de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: 30122de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: 30132de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: 30142de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: 30152de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: 30162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: 30172de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_And: 30182de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Xor: 30192de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Or: 30202de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Comma: { 3021d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 3022d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 30232de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Exp->getOpcode() == BO_Div || 30242de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall Exp->getOpcode() == BO_Rem) { 3025d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Evaluate gives an error for undefined Div/Rem, so make sure 3026d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // we don't evaluate one. 30273b332ab132fa85c83833d74d400f6e126f52fbd2John McCall if (LHSResult.Val == 0 && RHSResult.Val == 0) { 3028a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith llvm::APSInt REval = Exp->getRHS()->EvaluateKnownConstInt(Ctx); 3029d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval == 0) 3030d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 3031d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval.isSigned() && REval.isAllOnesValue()) { 3032a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith llvm::APSInt LEval = Exp->getLHS()->EvaluateKnownConstInt(Ctx); 3033d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LEval.isMinSignedValue()) 3034d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 3035d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3036d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3037d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 30382de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Exp->getOpcode() == BO_Comma) { 3039d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Ctx.getLangOptions().C99) { 3040d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C99 6.6p3 introduces a strange edge case: comma can be in an ICE 3041d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // if it isn't evaluated. 3042d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 0) 3043d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 3044d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } else { 3045d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // In both C89 and C++, commas in ICEs are illegal. 3046d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 3047d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3048d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3049d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 3050d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 3051d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 3052d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 30532de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LAnd: 30542de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LOr: { 3055d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 305663fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 305763fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // C++0x [expr.const]p2: 305863fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // [...] subexpressions of logical AND (5.14), logical OR 305963fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // (5.15), and condi- tional (5.16) operations that are not 306063fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // evaluated are not considered. 306163fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor if (Ctx.getLangOptions().CPlusPlus0x && LHSResult.Val == 0) { 306263fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor if (Exp->getOpcode() == BO_LAnd && 3063a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith Exp->getLHS()->EvaluateKnownConstInt(Ctx) == 0) 306463fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor return LHSResult; 306563fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 306663fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor if (Exp->getOpcode() == BO_LOr && 3067a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith Exp->getLHS()->EvaluateKnownConstInt(Ctx) != 0) 306863fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor return LHSResult; 306963fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor } 307063fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 3071d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 3072d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 1) { 3073d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the RHS has a comma "side-effect"; we need 3074d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to actually check the condition to see whether the side 3075d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // with the comma is evaluated. 30762de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if ((Exp->getOpcode() == BO_LAnd) != 3077a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith (Exp->getLHS()->EvaluateKnownConstInt(Ctx) == 0)) 3078d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 3079d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 3080d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3081d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 3082d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 3083d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 3084d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 3085d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3086d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3087d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3088d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitCastExprClass: 3089d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CStyleCastExprClass: 3090d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXFunctionalCastExprClass: 3091d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXStaticCastExprClass: 3092d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXReinterpretCastExprClass: 309332cb47174304bc7ec11478b9497c4e10f48273d9Richard Smith case Expr::CXXConstCastExprClass: 3094f85e193739c953358c865005855253af4f68a497John McCall case Expr::ObjCBridgedCastExprClass: { 3095d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const Expr *SubExpr = cast<CastExpr>(E)->getSubExpr(); 309632cb47174304bc7ec11478b9497c4e10f48273d9Richard Smith if (E->getStmtClass() != Expr::ImplicitCastExprClass && 309732cb47174304bc7ec11478b9497c4e10f48273d9Richard Smith isa<FloatingLiteral>(SubExpr->IgnoreParenImpCasts())) 309832cb47174304bc7ec11478b9497c4e10f48273d9Richard Smith return NoDiag(); 3099eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman switch (cast<CastExpr>(E)->getCastKind()) { 3100eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman case CK_LValueToRValue: 3101eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman case CK_NoOp: 3102eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman case CK_IntegralToBoolean: 3103eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman case CK_IntegralCast: 3104d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(SubExpr, Ctx); 3105eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman default: 3106eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman return ICEDiag(2, E->getLocStart()); 3107eea0e817c609c662f3fef61bb257fddf1ae8f7b7Eli Friedman } 3108d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 310956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall case Expr::BinaryConditionalOperatorClass: { 311056ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall const BinaryConditionalOperator *Exp = cast<BinaryConditionalOperator>(E); 311156ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall ICEDiag CommonResult = CheckICE(Exp->getCommon(), Ctx); 311256ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (CommonResult.Val == 2) return CommonResult; 311356ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall ICEDiag FalseResult = CheckICE(Exp->getFalseExpr(), Ctx); 311456ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (FalseResult.Val == 2) return FalseResult; 311556ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (CommonResult.Val == 1) return CommonResult; 311656ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall if (FalseResult.Val == 1 && 3117a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith Exp->getCommon()->EvaluateKnownConstInt(Ctx) == 0) return NoDiag(); 311856ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall return FalseResult; 311956ca35d396d8692c384c785f9aeebcf22563fe1eJohn McCall } 3120d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ConditionalOperatorClass: { 3121d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const ConditionalOperator *Exp = cast<ConditionalOperator>(E); 3122d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // If the condition (ignoring parens) is a __builtin_constant_p call, 3123d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // then only the true side is actually considered in an integer constant 3124d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // expression, and it is fully evaluated. This is an important GNU 3125d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // extension. See GCC PR38377 for discussion. 3126d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const CallExpr *CallCE 3127d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall = dyn_cast<CallExpr>(Exp->getCond()->IgnoreParenCasts())) 3128d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CallCE->isBuiltinCall(Ctx) == Builtin::BI__builtin_constant_p) { 3129d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 3130d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!E->Evaluate(EVResult, Ctx) || EVResult.HasSideEffects || 3131d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 3132d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 3133d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3134d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 3135d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3136d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag CondResult = CheckICE(Exp->getCond(), Ctx); 3137d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 2) 3138d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 313963fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 314063fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // C++0x [expr.const]p2: 314163fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // subexpressions of [...] conditional (5.16) operations that 314263fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor // are not evaluated are not considered 314363fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor bool TrueBranch = Ctx.getLangOptions().CPlusPlus0x 3144a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith ? Exp->getCond()->EvaluateKnownConstInt(Ctx) != 0 314563fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor : false; 314663fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor ICEDiag TrueResult = NoDiag(); 314763fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor if (!Ctx.getLangOptions().CPlusPlus0x || TrueBranch) 314863fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor TrueResult = CheckICE(Exp->getTrueExpr(), Ctx); 314963fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor ICEDiag FalseResult = NoDiag(); 315063fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor if (!Ctx.getLangOptions().CPlusPlus0x || !TrueBranch) 315163fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor FalseResult = CheckICE(Exp->getFalseExpr(), Ctx); 315263fe6814f339df30b8463b39995947cbdf920e48Douglas Gregor 3153d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 2) 3154d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 3155d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (FalseResult.Val == 2) 3156d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 3157d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 1) 3158d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 3159d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 0 && FalseResult.Val == 0) 3160d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 3161d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the diagnostics depend on which side is evaluated 3162d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that if we get here, CondResult is 0, and at least one of 3163d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // TrueResult and FalseResult is non-zero. 3164a6b8b2c09610b8bc4330e948ece8b940c2386406Richard Smith if (Exp->getCond()->EvaluateKnownConstInt(Ctx) == 0) { 3165d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 3166d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3167d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 3168d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3169d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDefaultArgExprClass: 3170d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<CXXDefaultArgExpr>(E)->getExpr(), Ctx); 3171d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ChooseExprClass: { 3172d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ChooseExpr>(E)->getChosenSubExpr(Ctx), Ctx); 3173d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3174d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3175d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 3176d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Silence a GCC warning 3177d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 3178d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 3179d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 3180d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallbool Expr::isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 3181d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall SourceLocation *Loc, bool isEvaluated) const { 3182d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag d = CheckICE(this, Ctx); 3183d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (d.Val != 0) { 3184d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Loc) *Loc = d.Loc; 3185d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return false; 3186d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 3187d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall EvalResult EvalResult; 3188d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!Evaluate(EvalResult, Ctx)) 3189d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm_unreachable("ICE cannot be evaluated!"); 3190d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(!EvalResult.HasSideEffects && "ICE with side effects!"); 3191d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(EvalResult.Val.isInt() && "ICE that isn't integer!"); 3192d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Result = EvalResult.Val.getInt(); 3193d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return true; 3194d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 3195