ExprConstant.cpp revision 09a8a0e6ec1252cad52666e9dbb21002b9c80f38
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" 1619cc4abea06a9b49e0e16a50d335c064cd723572Anders Carlsson#include "clang/AST/RecordLayout.h" 170fe52e1bcaa69ba127f1bda036f057fec1f478deSeo Sanghyeon#include "clang/AST/StmtVisitor.h" 18500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/AST/ASTDiagnostic.h" 191b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.h" 2006a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson#include "clang/Basic/TargetInfo.h" 217462b39a9bccaf4392687831036713f09f9c0681Mike Stump#include "llvm/ADT/SmallString.h" 224572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump#include <cstring> 234572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump 24c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlssonusing namespace clang; 25f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerusing llvm::APSInt; 26d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanusing llvm::APFloat; 27c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson 2887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// EvalInfo - This is a private struct used by the evaluator to capture 2987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// information about a subexpression as it is folded. It retains information 3087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// about the AST context, but also maintains information about the folded 3187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// expression. 3287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// 3387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// If an expression could be evaluated, it is still possible it is not a C 3487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// "integer constant expression" or constant expression. If not, this struct 3587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// captures information about how and why not. 3687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// 3787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// One bit of information passed *into* the request for constant folding 3887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// indicates whether the subexpression is "evaluated" or not according to C 3987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// rules. For example, the RHS of (0 && foo()) is not evaluated. We can 4087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// evaluate the expression regardless of what the RHS is, but C only allows 4187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// certain things in certain situations. 4287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstruct EvalInfo { 4387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner ASTContext &Ctx; 441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4554da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson /// EvalResult - Contains information about the evaluation. 4654da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Expr::EvalResult &EvalResult; 47f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson 48b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman /// AnyLValue - Stack based LValue results are not discarded. 49b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman bool AnyLValue; 50b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 51b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman EvalInfo(ASTContext &ctx, Expr::EvalResult& evalresult, 52b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman bool anylvalue = false) 53b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman : Ctx(ctx), EvalResult(evalresult), AnyLValue(anylvalue) {} 5487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner}; 5587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 5687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 574efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanstatic bool EvaluateLValue(const Expr *E, APValue &Result, EvalInfo &Info); 5887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluatePointer(const Expr *E, APValue &Result, EvalInfo &Info); 5987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluateInteger(const Expr *E, APSInt &Result, EvalInfo &Info); 60d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattnerstatic bool EvaluateIntegerOrLValue(const Expr *E, APValue &Result, 61d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner EvalInfo &Info); 62d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr *E, APFloat &Result, EvalInfo &Info); 63a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbarstatic bool EvaluateComplex(const Expr *E, APValue &Result, EvalInfo &Info); 64f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 65f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 664efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// Misc utilities 674efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 695bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedmanstatic bool EvalPointerValueAsBool(APValue& Value, bool& Result) { 705bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // FIXME: Is this accurate for all kinds of bases? If not, what would 715bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // the check look like? 725bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman Result = Value.getLValueBase() || Value.getLValueOffset(); 735bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return true; 745bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman} 755bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman 764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanstatic bool HandleConversionToBool(Expr* E, bool& Result, EvalInfo &Info) { 774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->getType()->isIntegralType()) { 784efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 794efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateInteger(E, IntResult, Info)) 804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = IntResult != 0; 824efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else if (E->getType()->isRealFloatingType()) { 844efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APFloat FloatResult(0.0); 854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateFloat(E, FloatResult, Info)) 864efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = !FloatResult.isZero(); 884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 89a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->hasPointerRepresentation()) { 904efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue PointerResult; 914efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluatePointer(E, PointerResult, Info)) 924efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 935bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return EvalPointerValueAsBool(PointerResult, Result); 94a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->isAnyComplexType()) { 95a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman APValue ComplexResult; 96a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (!EvaluateComplex(E, ComplexResult, Info)) 97a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return false; 98a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (ComplexResult.isComplexFloat()) { 99a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = !ComplexResult.getComplexFloatReal().isZero() || 100a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman !ComplexResult.getComplexFloatImag().isZero(); 101a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else { 102a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = ComplexResult.getComplexIntReal().getBoolValue() || 103a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman ComplexResult.getComplexIntImag().getBoolValue(); 104a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } 105a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return true; 1064efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 1074efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 1104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleFloatToIntCast(QualType DestType, QualType SrcType, 112a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat &Value, ASTContext &Ctx) { 113a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 114a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Determine whether we are converting to unsigned or signed. 115a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool DestSigned = DestType->isSignedIntegerType(); 1161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 117a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // FIXME: Warning for overflow. 118a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar uint64_t Space[4]; 119a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 120a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar (void)Value.convertToInteger(Space, DestWidth, DestSigned, 121a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar llvm::APFloat::rmTowardZero, &ignored); 122a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APSInt(llvm::APInt(DestWidth, 4, Space), !DestSigned); 123a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 124a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleFloatToFloatCast(QualType DestType, QualType SrcType, 126a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat &Value, ASTContext &Ctx) { 127a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 128a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result = Value; 1291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.convert(Ctx.getFloatTypeSemantics(DestType), 130a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven, &ignored); 131a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 132a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 133a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleIntToIntCast(QualType DestType, QualType SrcType, 135a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt &Value, ASTContext &Ctx) { 136a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 137a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt Result = Value; 138a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Figure out if this is a truncate, extend or noop cast. 139a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // If the input is signed, do a sign extend, noop, or truncate. 140a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.extOrTrunc(DestWidth); 141a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.setIsUnsigned(DestType->isUnsignedIntegerType()); 142a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 143a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 144a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleIntToFloatCast(QualType DestType, QualType SrcType, 146a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt &Value, ASTContext &Ctx) { 147a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 148a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result(Ctx.getFloatTypeSemantics(DestType), 1); 149a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.convertFromAPInt(Value, Value.isSigned(), 150a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven); 151a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 152a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 153a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 154c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumpnamespace { 155770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass HasSideEffect 156c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump : public StmtVisitor<HasSideEffect, bool> { 157c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump EvalInfo &Info; 158c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumppublic: 159c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 160c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump HasSideEffect(EvalInfo &info) : Info(info) {} 161c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 162c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // Unhandled nodes conservatively default to having side effects. 163c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitStmt(Stmt *S) { 164c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 165c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 166c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 167c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 168c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitDeclRefExpr(DeclRefExpr *E) { 169df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (Info.Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 170c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 171c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return false; 172c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 173c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // We don't want to evaluate BlockExprs multiple times, as they generate 174c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // a ton of code. 175c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitBlockExpr(BlockExpr *E) { return true; } 176c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitPredefinedExpr(PredefinedExpr *E) { return false; } 177c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitCompoundLiteralExpr(CompoundLiteralExpr *E) 178c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump { return Visit(E->getInitializer()); } 179c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitMemberExpr(MemberExpr *E) { return Visit(E->getBase()); } 180c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitIntegerLiteral(IntegerLiteral *E) { return false; } 181c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitFloatingLiteral(FloatingLiteral *E) { return false; } 182c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitStringLiteral(StringLiteral *E) { return false; } 183c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitCharacterLiteral(CharacterLiteral *E) { return false; } 184c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E) { return false; } 185c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitArraySubscriptExpr(ArraySubscriptExpr *E) 186980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 187c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitChooseExpr(ChooseExpr *E) 188c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump { return Visit(E->getChosenSubExpr(Info.Ctx)); } 189c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitCastExpr(CastExpr *E) { return Visit(E->getSubExpr()); } 190c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitBinAssign(BinaryOperator *E) { return true; } 1913f0147e161df4725ff15fbb731f4f727afcc229fMike Stump bool VisitCompoundAssignOperator(BinaryOperator *E) { return true; } 192980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump bool VisitBinaryOperator(BinaryOperator *E) 193980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 194c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPreInc(UnaryOperator *E) { return true; } 195c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPostInc(UnaryOperator *E) { return true; } 196c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPreDec(UnaryOperator *E) { return true; } 197c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPostDec(UnaryOperator *E) { return true; } 198c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryDeref(UnaryOperator *E) { 199df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (Info.Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 200c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 201980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump return Visit(E->getSubExpr()); 202c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 203c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryOperator(UnaryOperator *E) { return Visit(E->getSubExpr()); } 204c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump}; 205c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 206c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump} // end anonymous namespace 207c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 2084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 2094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// LValue Evaluation 2104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 2114efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmannamespace { 212770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass LValueExprEvaluator 2134efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman : public StmtVisitor<LValueExprEvaluator, APValue> { 2144efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman EvalInfo &Info; 2154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanpublic: 2161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2174efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman LValueExprEvaluator(EvalInfo &info) : Info(info) {} 2184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitStmt(Stmt *S) { 2204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 2214efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 22435873c49adad211ff466e34342a52665742794f5Anders Carlsson APValue VisitDeclRefExpr(DeclRefExpr *E); 2254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitPredefinedExpr(PredefinedExpr *E) { return APValue(E, 0); } 2264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitCompoundLiteralExpr(CompoundLiteralExpr *E); 2274efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitMemberExpr(MemberExpr *E); 2284efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitStringLiteral(StringLiteral *E) { return APValue(E, 0); } 229eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner APValue VisitObjCEncodeExpr(ObjCEncodeExpr *E) { return APValue(E, 0); } 2303068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue VisitArraySubscriptExpr(ArraySubscriptExpr *E); 231e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman APValue VisitUnaryDeref(UnaryOperator *E); 232ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 233ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 234ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 235ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 23626bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson 23726bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson APValue VisitCastExpr(CastExpr *E) { 23826bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson switch (E->getCastKind()) { 23926bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson default: 24026bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson return APValue(); 24126bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson 24226bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson case CastExpr::CK_NoOp: 24326bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson return Visit(E->getSubExpr()); 24426bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 24526bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 246ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: __real__, __imag__ 2474efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman}; 2484efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} // end anonymous namespace 2494efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanstatic bool EvaluateLValue(const Expr* E, APValue& Result, EvalInfo &Info) { 2514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = LValueExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 2524efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result.isLValue(); 2534efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 2544efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2551eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue LValueExprEvaluator::VisitDeclRefExpr(DeclRefExpr *E) { 25650c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (isa<FunctionDecl>(E->getDecl())) { 25750c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman return APValue(E, 0); 25850c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } else if (VarDecl* VD = dyn_cast<VarDecl>(E->getDecl())) { 259b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman if (!Info.AnyLValue && !VD->hasGlobalStorage()) 260d933a0198f3ccce9c73bf2951625315b911d37bfEli Friedman return APValue(); 26150c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (!VD->getType()->isReferenceType()) 26250c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman return APValue(E, 0); 263d933a0198f3ccce9c73bf2951625315b911d37bfEli Friedman // FIXME: Check whether VD might be overridden! 264cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor const VarDecl *Def = 0; 265cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor if (const Expr *Init = VD->getDefinition(Def)) 266cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor return Visit(const_cast<Expr *>(Init)); 26750c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } 26850c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman 26950c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman return APValue(); 27035873c49adad211ff466e34342a52665742794f5Anders Carlsson} 27135873c49adad211ff466e34342a52665742794f5Anders Carlsson 2724efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue LValueExprEvaluator::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 273b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman if (!Info.AnyLValue && !E->isFileScope()) 274b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman return APValue(); 275b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman return APValue(E, 0); 2764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 2774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2784efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue LValueExprEvaluator::VisitMemberExpr(MemberExpr *E) { 2794efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue result; 2804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman QualType Ty; 2814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->isArrow()) { 2824efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluatePointer(E->getBase(), result, Info)) 2834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 2846217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek Ty = E->getBase()->getType()->getAs<PointerType>()->getPointeeType(); 2854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else { 2864efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result = Visit(E->getBase()); 2874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (result.isUninit()) 2884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 2894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Ty = E->getBase()->getType(); 2904efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2914efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2926217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *RD = Ty->getAs<RecordType>()->getDecl(); 2934efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 29486f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 29586f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor FieldDecl *FD = dyn_cast<FieldDecl>(E->getMemberDecl()); 29686f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (!FD) // FIXME: deal with other kinds of member expressions 29786f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return APValue(); 2982be586108bb401019647791feca19ea03fd477ceEli Friedman 2992be586108bb401019647791feca19ea03fd477ceEli Friedman if (FD->getType()->isReferenceType()) 3002be586108bb401019647791feca19ea03fd477ceEli Friedman return APValue(); 3012be586108bb401019647791feca19ea03fd477ceEli Friedman 3024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // FIXME: This is linear time. 30344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor unsigned i = 0; 30417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = RD->field_begin(), 30517945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = RD->field_end(); 30644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; (void)++Field, ++i) { 30744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (*Field == FD) 3084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman break; 3094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3114efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result.setLValue(result.getLValueBase(), 3124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result.getLValueOffset() + RL.getFieldOffset(i) / 8); 3134efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3144efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return result; 3154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 3164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3171eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue LValueExprEvaluator::VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 3183068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue Result; 3191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3203068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getBase(), Result, Info)) 3213068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return APValue(); 3221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3233068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APSInt Index; 3243068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluateInteger(E->getIdx(), Index, Info)) 3253068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return APValue(); 3263068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 3273068d117951a8df54bae9db039b56201ab10962bAnders Carlsson uint64_t ElementSize = Info.Ctx.getTypeSize(E->getType()) / 8; 3283068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 3293068d117951a8df54bae9db039b56201ab10962bAnders Carlsson uint64_t Offset = Index.getSExtValue() * ElementSize; 3301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.setLValue(Result.getLValueBase(), 3313068d117951a8df54bae9db039b56201ab10962bAnders Carlsson Result.getLValueOffset() + Offset); 3323068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return Result; 3333068d117951a8df54bae9db039b56201ab10962bAnders Carlsson} 3344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3351eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue LValueExprEvaluator::VisitUnaryDeref(UnaryOperator *E) { 336e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman APValue Result; 337e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman if (!EvaluatePointer(E->getSubExpr(), Result, Info)) 338e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman return APValue(); 339e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman return Result; 340e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman} 341e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman 3424efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 343f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Pointer Evaluation 344f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 345f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 346c754aa62643e66ab967ca32ae8b0b3fc419bba25Anders Carlssonnamespace { 347770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass PointerExprEvaluator 3482bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson : public StmtVisitor<PointerExprEvaluator, APValue> { 34987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 3502bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonpublic: 3511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 35287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner PointerExprEvaluator(EvalInfo &info) : Info(info) {} 353f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 3542bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson APValue VisitStmt(Stmt *S) { 3552bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson return APValue(); 3562bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 3572bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 3582bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 3592bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 360650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue VisitBinaryOperator(const BinaryOperator *E); 36109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman APValue VisitCastExpr(CastExpr* E); 3622217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 3632217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman { return Visit(E->getSubExpr()); } 3642217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman APValue VisitUnaryAddrOf(const UnaryOperator *E); 3654efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitObjCStringLiteral(ObjCStringLiteral *E) 3664efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman { return APValue(E, 0); } 367f01158941ba4560c63150032073bb231ce38999eEli Friedman APValue VisitAddrLabelExpr(AddrLabelExpr *E) 368f01158941ba4560c63150032073bb231ce38999eEli Friedman { return APValue(E, 0); } 3693941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman APValue VisitCallExpr(CallExpr *E); 370b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump APValue VisitBlockExpr(BlockExpr *E) { 371b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump if (!E->hasBlockDeclRefExprs()) 372b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump return APValue(E, 0); 373b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump return APValue(); 374b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump } 37591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) 37691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return APValue((Expr*)0, 0); } 3774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitConditionalOperator(ConditionalOperator *E); 378ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(ChooseExpr *E) 3796e8ed16ffef02b82995a90bdcf10ffff7d63839aSebastian Redl { return Visit(E->getChosenSubExpr(Info.Ctx)); } 3806e8ed16ffef02b82995a90bdcf10ffff7d63839aSebastian Redl APValue VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) 3816e8ed16ffef02b82995a90bdcf10ffff7d63839aSebastian Redl { return APValue((Expr*)0, 0); } 382ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: @protocol, @selector 3832bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson}; 384f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 3852bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 38687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluatePointer(const Expr* E, APValue& Result, EvalInfo &Info) { 3878958891f5fa1e593c4519a36b3df427ee019d70bDaniel Dunbar if (!E->getType()->hasPointerRepresentation()) 388f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return false; 38987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner Result = PointerExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 390f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return Result.isLValue(); 391f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 392650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 393f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris LattnerAPValue PointerExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 394650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() != BinaryOperator::Add && 395650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson E->getOpcode() != BinaryOperator::Sub) 396650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 3971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 398650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *PExp = E->getLHS(); 399650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *IExp = E->getRHS(); 400650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (IExp->getType()->isPointerType()) 401f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner std::swap(PExp, IExp); 4021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 403650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue ResultLValue; 40487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(PExp, ResultLValue, Info)) 405650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 4061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 407650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson llvm::APSInt AdditionalOffset(32); 40887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluateInteger(IExp, AdditionalOffset, Info)) 409650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 410650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 4116217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek QualType PointeeType = PExp->getType()->getAs<PointerType>()->getPointeeType(); 4124d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson uint64_t SizeOfPointee; 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4144d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson // Explicitly handle GNU void* and function pointer arithmetic extensions. 4154d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson if (PointeeType->isVoidType() || PointeeType->isFunctionType()) 4164d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson SizeOfPointee = 1; 4174d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson else 4184d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson SizeOfPointee = Info.Ctx.getTypeSize(PointeeType) / 8; 4194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 420650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson uint64_t Offset = ResultLValue.getLValueOffset(); 4214efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 422650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() == BinaryOperator::Add) 4234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Offset += AdditionalOffset.getLimitedValue() * SizeOfPointee; 424650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson else 4254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Offset -= AdditionalOffset.getLimitedValue() * SizeOfPointee; 4264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 427650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(ResultLValue.getLValueBase(), Offset); 428650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 4294efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4302217c87bdc5ab357046a5453bdb06f469c41024eEli FriedmanAPValue PointerExprEvaluator::VisitUnaryAddrOf(const UnaryOperator *E) { 4312217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman APValue result; 4322217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman if (EvaluateLValue(E->getSubExpr(), result, Info)) 4332217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman return result; 4344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 4354efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 4361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 437650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 43809a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli FriedmanAPValue PointerExprEvaluator::VisitCastExpr(CastExpr* E) { 43909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman Expr* SubExpr = E->getSubExpr(); 440650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 44109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman switch (E->getCastKind()) { 44209a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman default: 44309a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 44409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 44509a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_Unknown: { 44609a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman // FIXME: The handling for CK_Unknown is ugly/shouldn't be necessary! 44709a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 44809a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman // Check for pointer->pointer cast 44909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman if (SubExpr->getType()->isPointerType() || 45009a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman SubExpr->getType()->isObjCObjectPointerType() || 45109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman SubExpr->getType()->isNullPtrType() || 45209a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman SubExpr->getType()->isBlockPointerType()) 45309a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman return Visit(SubExpr); 45409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 45509a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman if (SubExpr->getType()->isIntegralType()) { 45609a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman APValue Result; 45709a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman if (!EvaluateIntegerOrLValue(SubExpr, Result, Info)) 45809a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 45909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 46009a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman if (Result.isInt()) { 46109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman Result.getInt().extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 46209a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman return APValue(0, Result.getInt().getZExtValue()); 46309a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman } 46409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 46509a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman // Cast is of an lvalue, no need to change value. 466650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return Result; 46709a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman } 46809a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 469650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 4701eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 47109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_NoOp: 47209a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_BitCast: 47309a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_AnyPointerToObjCPointerCast: 47409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_AnyPointerToBlockPointerCast: 47509a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman return Visit(SubExpr); 47609a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 47709a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_IntegralToPointer: { 47869ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar APValue Result; 47969ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (!EvaluateIntegerOrLValue(SubExpr, Result, Info)) 48009a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 48169ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 48269ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (Result.isInt()) { 48369ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar Result.getInt().extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 48469ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return APValue(0, Result.getInt().getZExtValue()); 485650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 4861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 48769ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar // Cast is of an lvalue, no need to change value. 48869ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return Result; 489650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 49009a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_ArrayToPointerDecay: 49109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_FunctionToPointerDecay: { 4924efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue Result; 4934efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluateLValue(SubExpr, Result, Info)) 4944efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result; 49509a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 49609a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman } 4974efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 4984efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 499650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 5001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 501650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 5023941b18b8e441c8c466efecd557de60b9a32d10bEli FriedmanAPValue PointerExprEvaluator::VisitCallExpr(CallExpr *E) { 5031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (E->isBuiltinCall(Info.Ctx) == 5043c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor Builtin::BI__builtin___CFStringMakeConstantString) 5053941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman return APValue(E, 0); 5063941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman return APValue(); 5073941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman} 5083941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman 5094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue PointerExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 5104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 5114efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 5124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 5134efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5144efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 5154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue Result; 5174efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluatePointer(EvalExpr, Result, Info)) 5184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result; 5194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 5204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 521f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 522f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 52359b5da6d853b4368b984700315adf7b37de05764Nate Begeman// Vector Evaluation 52459b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 52559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 52659b5da6d853b4368b984700315adf7b37de05764Nate Begemannamespace { 527770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramer class VectorExprEvaluator 52859b5da6d853b4368b984700315adf7b37de05764Nate Begeman : public StmtVisitor<VectorExprEvaluator, APValue> { 52959b5da6d853b4368b984700315adf7b37de05764Nate Begeman EvalInfo &Info; 53091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue GetZeroVector(QualType VecType); 53159b5da6d853b4368b984700315adf7b37de05764Nate Begeman public: 5321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 53359b5da6d853b4368b984700315adf7b37de05764Nate Begeman VectorExprEvaluator(EvalInfo &info) : Info(info) {} 5341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 53559b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitStmt(Stmt *S) { 53659b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 53759b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 5381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 53991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitParenExpr(ParenExpr *E) 54091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 54191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 54291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 54391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryPlus(const UnaryOperator *E) 54491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 54591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryReal(const UnaryOperator *E) 54691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 54791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) 54891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return GetZeroVector(E->getType()); } 54959b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCastExpr(const CastExpr* E); 55059b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 55159b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitInitListExpr(const InitListExpr *E); 55291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitConditionalOperator(const ConditionalOperator *E); 553ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 554ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 55591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryImag(const UnaryOperator *E); 55691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // FIXME: Missing: unary -, unary ~, binary add/sub/mul/div, 5572217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // binary comparisons, binary and/or/xor, 55891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // shufflevector, ExtVectorElementExpr 55991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // (Note that these require implementing conversions 56091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // between vector types.) 56159b5da6d853b4368b984700315adf7b37de05764Nate Begeman }; 56259b5da6d853b4368b984700315adf7b37de05764Nate Begeman} // end anonymous namespace 56359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 56459b5da6d853b4368b984700315adf7b37de05764Nate Begemanstatic bool EvaluateVector(const Expr* E, APValue& Result, EvalInfo &Info) { 56559b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!E->getType()->isVectorType()) 56659b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 56759b5da6d853b4368b984700315adf7b37de05764Nate Begeman Result = VectorExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 56859b5da6d853b4368b984700315adf7b37de05764Nate Begeman return !Result.isUninit(); 56959b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 57059b5da6d853b4368b984700315adf7b37de05764Nate Begeman 57159b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue VectorExprEvaluator::VisitCastExpr(const CastExpr* E) { 572183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VTy = E->getType()->getAs<VectorType>(); 573c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman QualType EltTy = VTy->getElementType(); 574c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned NElts = VTy->getNumElements(); 575c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned EltWidth = Info.Ctx.getTypeSize(EltTy); 5761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 57759b5da6d853b4368b984700315adf7b37de05764Nate Begeman const Expr* SE = E->getSubExpr(); 578e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman QualType SETy = SE->getType(); 579e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APValue Result = APValue(); 58059b5da6d853b4368b984700315adf7b37de05764Nate Begeman 581e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman // Check for vector->vector bitcast and scalar->vector splat. 582e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman if (SETy->isVectorType()) { 58359b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(SE)); 584e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isIntegerType()) { 585e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APSInt IntResult; 586d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateInteger(SE, IntResult, Info)) 587d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 588d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(IntResult); 589e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isRealFloatingType()) { 590e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APFloat F(0.0); 591d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateFloat(SE, F, Info)) 592d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 593d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(F); 594d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar } else 595c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 59659b5da6d853b4368b984700315adf7b37de05764Nate Begeman 597c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to ExtVector, convert the scalar to the element type 598c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // and splat it to all elements. 599c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (E->getType()->isExtVectorType()) { 600c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType() && Result.isInt()) 601c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToIntCast(EltTy, SETy, Result.getInt(), 602c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 603c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isIntegerType()) 604c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToIntCast(EltTy, SETy, Result.getFloat(), 605c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 606c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType() && Result.isInt()) 607c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToFloatCast(EltTy, SETy, Result.getInt(), 608c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 609c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 610c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToFloatCast(EltTy, SETy, Result.getFloat(), 611c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 612c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 613c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 614c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 615c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // Splat and create vector APValue. 616c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts(NElts, Result); 617c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 618e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } 619c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 620c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to regular gcc-style vector type, bitcast the scalar 621c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // to the vector. To construct the APValue vector initializer, bitcast the 622c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // initializing value to an APInt, and shift out the bits pertaining to each 623c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // element. 624c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman APSInt Init; 625c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init = Result.isInt() ? Result.getInt() : Result.getFloat().bitcastToAPInt(); 6261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 627c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts; 628c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman for (unsigned i = 0; i != NElts; ++i) { 629c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman APSInt Tmp = Init; 630c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Tmp.extOrTrunc(EltWidth); 6311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 632c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType()) 633c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(Tmp)); 634c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 635c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(APFloat(Tmp))); 636c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 637c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 638c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 639c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init >>= EltWidth; 640c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman } 641c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 64259b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 64359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 6441eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 64559b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 64659b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(E->getInitializer())); 64759b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 64859b5da6d853b4368b984700315adf7b37de05764Nate Begeman 6491eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 65059b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 651183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = E->getType()->getAs<VectorType>(); 65259b5da6d853b4368b984700315adf7b37de05764Nate Begeman unsigned NumInits = E->getNumInits(); 65391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman unsigned NumElements = VT->getNumElements(); 6541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 65559b5da6d853b4368b984700315adf7b37de05764Nate Begeman QualType EltTy = VT->getElementType(); 65659b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::SmallVector<APValue, 4> Elements; 65759b5da6d853b4368b984700315adf7b37de05764Nate Begeman 65891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman for (unsigned i = 0; i < NumElements; i++) { 65959b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (EltTy->isIntegerType()) { 66059b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APSInt sInt(32); 66191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (i < NumInits) { 66291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!EvaluateInteger(E->getInit(i), sInt, Info)) 66391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 66491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 66591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman sInt = Info.Ctx.MakeIntValue(0, EltTy); 66691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 66759b5da6d853b4368b984700315adf7b37de05764Nate Begeman Elements.push_back(APValue(sInt)); 66859b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else { 66959b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APFloat f(0.0); 67091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (i < NumInits) { 67191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!EvaluateFloat(E->getInit(i), f, Info)) 67291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 67391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 67491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman f = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy)); 67591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 67659b5da6d853b4368b984700315adf7b37de05764Nate Begeman Elements.push_back(APValue(f)); 67759b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 67859b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 67959b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(&Elements[0], Elements.size()); 68059b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 68159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 6821eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 68391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanVectorExprEvaluator::GetZeroVector(QualType T) { 684183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = T->getAs<VectorType>(); 68591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman QualType EltTy = VT->getElementType(); 68691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue ZeroElement; 68791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EltTy->isIntegerType()) 68891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = APValue(Info.Ctx.MakeIntValue(0, EltTy)); 68991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman else 69091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = 69191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue(APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy))); 69291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 69391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman llvm::SmallVector<APValue, 4> Elements(VT->getNumElements(), ZeroElement); 69491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(&Elements[0], Elements.size()); 69591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 69691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 69791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 69891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman bool BoolResult; 69991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 70091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 70191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 70291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 70391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 70491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue Result; 70591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EvaluateVector(EvalExpr, Result, Info)) 70691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return Result; 70791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 70891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 70991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 71091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 71191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 71291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Info.EvalResult.HasSideEffects = true; 71391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return GetZeroVector(E->getType()); 71491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 71591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 71659b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 717f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Integer Evaluation 718f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 719f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 720f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnernamespace { 721770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass IntExprEvaluator 722b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner : public StmtVisitor<IntExprEvaluator, bool> { 72387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 72430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue &Result; 725f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerpublic: 72630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar IntExprEvaluator(EvalInfo &info, APValue &result) 72787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner : Info(info), Result(result) {} 728f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 7293f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar bool Success(const llvm::APSInt &SI, const Expr *E) { 7304fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar assert(E->getType()->isIntegralType() && "Invalid evaluation result."); 73130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.isSigned() == E->getType()->isSignedIntegerType() && 7323f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 73330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 7343f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 73530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(SI); 7363f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 7373f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 7383f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 739131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(const llvm::APInt &I, const Expr *E) { 7404fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar assert(E->getType()->isIntegralType() && "Invalid evaluation result."); 74130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(I.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 7423f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 74330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(APSInt(I)); 74430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt().setIsUnsigned(E->getType()->isUnsignedIntegerType()); 745131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 746131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 747131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 748131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(uint64_t Value, const Expr *E) { 7494fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar assert(E->getType()->isIntegralType() && "Invalid evaluation result."); 75030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(Info.Ctx.MakeIntValue(Value, E->getType())); 751131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 752131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 753131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 75482206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Error(SourceLocation L, diag::kind D, const Expr *E) { 75532fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // Take the first error. 75654da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson if (Info.EvalResult.Diag == 0) { 75754da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.DiagLoc = L; 75854da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.Diag = D; 75982206e267ce6cc709797127616f64672d255b310Anders Carlsson Info.EvalResult.DiagExpr = E; 76032fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 76154176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return false; 7627a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner } 7631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 764f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 765f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner // Visitor Methods 766f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 7671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 76832fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitStmt(Stmt *) { 76932fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner assert(0 && "This should be called on integers, stmts are not integers"); 77032fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner return false; 77132fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 7721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 77332fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitExpr(Expr *E) { 7740e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 775f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner } 7761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 777b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 778f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 7794c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitIntegerLiteral(const IntegerLiteral *E) { 780131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 7814c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 7824c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCharacterLiteral(const CharacterLiteral *E) { 783131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 7844c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 7854c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitTypesCompatibleExpr(const TypesCompatibleExpr *E) { 786ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // Per gcc docs "this built-in function ignores top level 787ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // qualifiers". We need to use the canonical version to properly 788ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // be able to strip CRV qualifiers from the type. 789ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T0 = Info.Ctx.getCanonicalType(E->getArgType1()); 790ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T1 = Info.Ctx.getCanonicalType(E->getArgType2()); 7911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(Info.Ctx.typesAreCompatible(T0.getUnqualifiedType(), 792131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar T1.getUnqualifiedType()), 793131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 7944c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 795043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 796043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool CheckReferencedDecl(const Expr *E, const Decl *D); 797043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitDeclRefExpr(const DeclRefExpr *E) { 798043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return CheckReferencedDecl(E, E->getDecl()); 799043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 800043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitMemberExpr(const MemberExpr *E) { 801043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (CheckReferencedDecl(E, E->getMemberDecl())) { 802043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman // Conservatively assume a MemberExpr will have side-effects 803043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman Info.EvalResult.HasSideEffects = true; 804043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return true; 805043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 806043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return false; 807043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 808043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 8094c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCallExpr(const CallExpr *E); 810b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitBinaryOperator(const BinaryOperator *E); 811b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitUnaryOperator(const UnaryOperator *E); 812ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes bool VisitConditionalOperator(const ConditionalOperator *E); 813f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 814a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool VisitCastExpr(CastExpr* E); 8150518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl bool VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E); 8160518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 8173068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 818131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 8193068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 8201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8213f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson bool VisitGNUNullExpr(const GNUNullExpr *E) { 822131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 8233f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson } 8241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8253068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXZeroInitValueExpr(const CXXZeroInitValueExpr *E) { 826131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 8273068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 8283068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 829664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { 830664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 831664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman } 832664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 83364b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) { 8345e03f9ea8174ae588c5e69ec6b5ef4c68f8fd766Douglas Gregor return Success(E->EvaluateTrait(Info.Ctx), E); 83564b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl } 83664b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl 837ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) { 838ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman return Visit(E->getChosenSubExpr(Info.Ctx)); 839ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman } 840ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 841722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman bool VisitUnaryReal(const UnaryOperator *E); 842664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitUnaryImag(const UnaryOperator *E); 843664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 844fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattnerprivate: 845af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner unsigned GetAlignOfExpr(const Expr *E); 846af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner unsigned GetAlignOfType(QualType T); 847664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman // FIXME: Missing: array subscript of vector, member of vector 848f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner}; 849f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 850f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 85169ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateIntegerOrLValue(const Expr* E, APValue &Result, EvalInfo &Info) { 8523f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!E->getType()->isIntegralType()) 8533f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return false; 8541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 85569ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return IntExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 85669ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar} 85769ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 85869ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateInteger(const Expr* E, APSInt &Result, EvalInfo &Info) { 85930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue Val; 86069ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (!EvaluateIntegerOrLValue(E, Val, Info) || !Val.isInt()) 86130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 86230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = Val.getInt(); 86330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return true; 864f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 865f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 866043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedmanbool IntExprEvaluator::CheckReferencedDecl(const Expr* E, const Decl* D) { 8674c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Enums are integer constant exprs. 86829a7f3342c3c6dd15d914c61ae22246c36d51ce7Eli Friedman if (const EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(D)) 86929a7f3342c3c6dd15d914c61ae22246c36d51ce7Eli Friedman return Success(ECD->getInitVal(), E); 870b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 871b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl // In C++, const, non-volatile integers initialized with ICEs are ICEs. 872e1646da3bb0fe97b372e5fe8cefc537b22048fc4Eli Friedman // In C, they can also be folded, although they are not ICEs. 873cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor if (Info.Ctx.getCanonicalType(E->getType()).getCVRQualifiers() 874cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor == Qualifiers::Const) { 875043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 876cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor const VarDecl *Def = 0; 877043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (const Expr *Init = VD->getDefinition(Def)) { 878c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (APValue *V = VD->getEvaluatedValue()) { 879c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (V->isInt()) 880c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Success(V->getInt(), E); 881c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 882c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman } 883c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 884c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (VD->isEvaluatingValue()) 885c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 886c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 887c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatingValue(); 888c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 88978d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor if (Visit(const_cast<Expr*>(Init))) { 89078d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor // Cache the evaluated value in the variable declaration. 891c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatedValue(Result); 89278d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return true; 89378d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 89478d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor 895c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatedValue(APValue()); 89678d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return false; 89778d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 898b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 899b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 900b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 9014c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Otherwise, random variable references are not constants. 9020e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 9034c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 9044c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner 905a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way 906a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// as GCC. 907a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattnerstatic int EvaluateBuiltinClassifyType(const CallExpr *E) { 908a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // The following enum mimics the values returned by GCC. 9097c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl // FIXME: Does GCC differ between lvalue and rvalue references here? 910a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enum gcc_type_class { 911a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner no_type_class = -1, 912a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner void_type_class, integer_type_class, char_type_class, 913a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enumeral_type_class, boolean_type_class, 914a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner pointer_type_class, reference_type_class, offset_type_class, 915a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner real_type_class, complex_type_class, 916a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner function_type_class, method_type_class, 917a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner record_type_class, union_type_class, 918a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner array_type_class, string_type_class, 919a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner lang_type_class 920a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner }; 9211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If no argument was supplied, default to "no_type_class". This isn't 923a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // ideal, however it is what gcc does. 924a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (E->getNumArgs() == 0) 925a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return no_type_class; 9261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 927a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner QualType ArgTy = E->getArg(0)->getType(); 928a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (ArgTy->isVoidType()) 929a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return void_type_class; 930a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isEnumeralType()) 931a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return enumeral_type_class; 932a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isBooleanType()) 933a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return boolean_type_class; 934a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isCharType()) 935a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return string_type_class; // gcc doesn't appear to use char_type_class 936a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isIntegerType()) 937a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return integer_type_class; 938a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isPointerType()) 939a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return pointer_type_class; 940a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isReferenceType()) 941a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return reference_type_class; 942a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isRealType()) 943a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return real_type_class; 944a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isComplexType()) 945a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return complex_type_class; 946a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isFunctionType()) 947a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return function_type_class; 948a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isStructureType()) 949a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return record_type_class; 950a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 951a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 952a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isArrayType()) 953a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return array_type_class; 954a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 955a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 956a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else // FIXME: offset_type_class, method_type_class, & lang_type_class? 957a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner assert(0 && "CallExpr::isBuiltinClassifyType(): unimplemented type"); 958a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return -1; 959a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner} 960a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 9614c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattnerbool IntExprEvaluator::VisitCallExpr(const CallExpr *E) { 9623c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 963019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner default: 9640e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 96564eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 96664eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump case Builtin::BI__builtin_object_size: { 96764eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump const Expr *Arg = E->getArg(0)->IgnoreParens(); 96864eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump Expr::EvalResult Base; 969660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (Arg->EvaluateAsAny(Base, Info.Ctx) 97064eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump && Base.Val.getKind() == APValue::LValue 97164eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump && !Base.HasSideEffects) 97264eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump if (const Expr *LVBase = Base.Val.getLValueBase()) 97364eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(LVBase)) { 97464eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) { 975460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump if (!VD->getType()->isIncompleteType() 976460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump && VD->getType()->isObjectType() 977460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump && !VD->getType()->isVariablyModifiedType() 978460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump && !VD->getType()->isDependentType()) { 979460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump uint64_t Size = Info.Ctx.getTypeSize(VD->getType()) / 8; 980460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump uint64_t Offset = Base.Val.getLValueOffset(); 981460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump if (Offset <= Size) 982460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump Size -= Base.Val.getLValueOffset(); 983460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump else 984460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump Size = 0; 985460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump return Success(Size, E); 986460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump } 98764eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 98864eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 98964eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 990fee667f35e64751baa7fefe70b4e7bab06c8cd86Eric Christopher // TODO: Perhaps we should let LLVM lower this? 991393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (E->getArg(0)->HasSideEffects(Info.Ctx)) { 992fee667f35e64751baa7fefe70b4e7bab06c8cd86Eric Christopher if (E->getArg(1)->EvaluateAsInt(Info.Ctx).getZExtValue() == 0) 993cf184655319cf7a5b811067cff9d26a5741fd161Chris Lattner return Success(-1ULL, E); 99464eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Success(0, E); 99564eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 996c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 99764eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 99864eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 99964eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 1000019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_classify_type: 1001131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(EvaluateBuiltinClassifyType(E), E); 10021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10034bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson case Builtin::BI__builtin_constant_p: 1004019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // __builtin_constant_p always has one operand: it returns true if that 1005019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // operand can be folded, false otherwise. 1006131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getArg(0)->isEvaluatable(Info.Ctx), E); 100721fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner 100821fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner case Builtin::BI__builtin_eh_return_data_regno: { 100921fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner int Operand = E->getArg(0)->EvaluateAsInt(Info.Ctx).getZExtValue(); 101021fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner Operand = Info.Ctx.Target.getEHDataRegisterNumber(Operand); 101121fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner return Success(Operand, E); 101221fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner } 1013019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 10144c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 1015f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 1016b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 1017a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == BinaryOperator::Comma) { 1018027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson if (!Visit(E->getRHS())) 1019027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return false; 10204fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson 102133ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // If we can't evaluate the LHS, it might have side effects; 102233ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // conservatively mark it. 102333ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 102433ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman Info.EvalResult.HasSideEffects = true; 1025c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner 1026027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return true; 1027a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1028a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1029a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->isLogicalOp()) { 1030a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // These need to be handled specially because the operands aren't 1031a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // necessarily integral 1032fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool lhsResult, rhsResult; 10331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1034fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getLHS(), lhsResult, Info)) { 103551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // We were able to evaluate the LHS, see if we can get away with not 103651fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // evaluating the RHS: 0 && X -> 0, 1 || X -> 1 103733ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman if (lhsResult == (E->getOpcode() == BinaryOperator::LOr)) 10383f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(lhsResult, E); 1039a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1040fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 10414bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson if (E->getOpcode() == BinaryOperator::LOr) 1042131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult || rhsResult, E); 10434bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson else 1044131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult && rhsResult, E); 10454bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 10464bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } else { 1047fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 10484bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // We can't evaluate the LHS; however, sometimes the result 10494bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // is determined by the RHS: X && 0 -> 0, X || 1 -> 1. 10501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (rhsResult == (E->getOpcode() == BinaryOperator::LOr) || 1051fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson !rhsResult == (E->getOpcode() == BinaryOperator::LAnd)) { 1052131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // Since we weren't able to evaluate the left hand side, it 1053fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // must have had side effects. 1054fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson Info.EvalResult.HasSideEffects = true; 1055131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 1056131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(rhsResult, E); 10574bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 10584bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 1059a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1060a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1061a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1062c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner } 106354176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 1064286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType LHSTy = E->getLHS()->getType(); 1065286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType RHSTy = E->getRHS()->getType(); 10664087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 10674087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHSTy->isAnyComplexType()) { 10684087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar assert(RHSTy->isAnyComplexType() && "Invalid comparison"); 10694087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar APValue LHS, RHS; 10704087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 10714087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getLHS(), LHS, Info)) 10724087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 10734087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 10744087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 10754087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 10764087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 10774087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHS.isComplexFloat()) { 10781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_r = 10794087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatReal().compare(RHS.getComplexFloatReal()); 10801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_i = 10814087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatImag().compare(RHS.getComplexFloatImag()); 10824087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 10834087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 1084131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((CR_r == APFloat::cmpEqual && 1085131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpEqual), E); 1086131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 1087131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 1088131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid complex comparison."); 10891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(((CR_r == APFloat::cmpGreaterThan || 1090131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_r == APFloat::cmpLessThan) && 10911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (CR_i == APFloat::cmpGreaterThan || 1092131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpLessThan)), E); 1093131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 10944087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } else { 10954087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 1096131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() == RHS.getComplexIntReal() && 1097131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() == RHS.getComplexIntImag()), E); 1098131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 1099131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 1100131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid compex comparison."); 1101131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() != RHS.getComplexIntReal() || 1102131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() != RHS.getComplexIntImag()), E); 1103131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 11044087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 11054087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 11061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1107286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (LHSTy->isRealFloatingType() && 1108286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson RHSTy->isRealFloatingType()) { 1109286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat RHS(0.0), LHS(0.0); 11101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1111286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1112286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 11131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1114286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getLHS(), LHS, Info)) 1115286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 11161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1117286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat::cmpResult CR = LHS.compare(RHS); 1118529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson 1119286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson switch (E->getOpcode()) { 1120286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson default: 1121286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson assert(0 && "Invalid binary operator!"); 1122286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LT: 1123131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan, E); 1124286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GT: 1125131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan, E); 1126286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LE: 1127131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan || CR == APFloat::cmpEqual, E); 1128286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GE: 11291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan || CR == APFloat::cmpEqual, 1130131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 1131286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::EQ: 1132131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpEqual, E); 1133286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::NE: 11341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan 1135131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar || CR == APFloat::cmpLessThan, E); 1136286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 1137286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 11381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1139ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (LHSTy->isPointerType() && RHSTy->isPointerType()) { 1140ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::Sub || E->isEqualityOp()) { 11413068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue LHSValue; 11423068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getLHS(), LHSValue, Info)) 11433068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1144a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 11453068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue RHSValue; 11463068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getRHS(), RHSValue, Info)) 11473068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1148a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 11495bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // Reject any bases from the normal codepath; we special-case comparisons 11505bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // to null. 11515bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (LHSValue.getLValueBase()) { 11525bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 11535bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11545bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (RHSValue.getLValueBase() || RHSValue.getLValueOffset()) 11555bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11565bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 11575bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(LHSValue, bres)) 11585bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11595bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return Success(bres ^ (E->getOpcode() == BinaryOperator::EQ), E); 11605bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } else if (RHSValue.getLValueBase()) { 11615bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 11625bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11635bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (LHSValue.getLValueBase() || LHSValue.getLValueOffset()) 11645bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11655bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 11665bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(RHSValue, bres)) 11675bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11685bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return Success(bres ^ (E->getOpcode() == BinaryOperator::EQ), E); 11695bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } 1170a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1171ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::Sub) { 1172ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman const QualType Type = E->getLHS()->getType(); 11736217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const QualType ElementType = Type->getAs<PointerType>()->getPointeeType(); 11743068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 1175ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman uint64_t D = LHSValue.getLValueOffset() - RHSValue.getLValueOffset(); 1176ce1bca73aef9bbf6359ab8420278203dda81a054Eli Friedman if (!ElementType->isVoidType() && !ElementType->isFunctionType()) 1177ce1bca73aef9bbf6359ab8420278203dda81a054Eli Friedman D /= Info.Ctx.getTypeSize(ElementType) / 8; 1178a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1179ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman return Success(D, E); 1180ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1181ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman bool Result; 1182ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::EQ) { 1183ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() == RHSValue.getLValueOffset(); 1184267c0ab1b9a15768f3f15abbfc40ce344751c78bEli Friedman } else { 1185ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() != RHSValue.getLValueOffset(); 1186ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1187ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman return Success(Result, E); 11883068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 11893068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 1190286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!LHSTy->isIntegralType() || 1191286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson !RHSTy->isIntegralType()) { 1192a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // We can't continue from here for non-integral types, and they 1193a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // could potentially confuse the following operations. 1194a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1195a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1196a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1197a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // The LHS of a constant expr is always evaluated and needed. 119830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Visit(E->getLHS())) 1199a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; // error in subexpression. 1200d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman 120142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APValue RHSVal; 120242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!EvaluateIntegerOrLValue(E->getRHS(), RHSVal, Info)) 120330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 120442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 120542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like (unsigned long)&a + 4. 120642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->isAdditiveOp() && Result.isLValue() && RHSVal.isInt()) { 120742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman uint64_t offset = Result.getLValueOffset(); 120842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->getOpcode() == BinaryOperator::Add) 120942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman offset += RHSVal.getInt().getZExtValue(); 121042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman else 121142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman offset -= RHSVal.getInt().getZExtValue(); 121242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman Result = APValue(Result.getLValueBase(), offset); 121342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 121442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 121542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 121642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like 4 + (unsigned long)&a 121742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->getOpcode() == BinaryOperator::Add && 121842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman RHSVal.isLValue() && Result.isInt()) { 121942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman uint64_t offset = RHSVal.getLValueOffset(); 122042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman offset += Result.getInt().getZExtValue(); 122142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman Result = APValue(RHSVal.getLValueBase(), offset); 122242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 122342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 122442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 122542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // All the following cases expect both operands to be an integer 122642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!Result.isInt() || !RHSVal.isInt()) 1227b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1228a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 122942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APSInt& RHS = RHSVal.getInt(); 123042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 1231a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson switch (E->getOpcode()) { 123232fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner default: 12330e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 123430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Mul: return Success(Result.getInt() * RHS, E); 123530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Add: return Success(Result.getInt() + RHS, E); 123630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Sub: return Success(Result.getInt() - RHS, E); 123730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::And: return Success(Result.getInt() & RHS, E); 123830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Xor: return Success(Result.getInt() ^ RHS, E); 123930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Or: return Success(Result.getInt() | RHS, E); 1240a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Div: 124154176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 12420e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 124330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() / RHS, E); 1244a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Rem: 124554176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 12460e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 124730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() % RHS, E); 12483f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shl: { 124954176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner // FIXME: Warn about out of range shift amounts! 12501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 125130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 125230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() << SA, E); 12533f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 12543f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shr: { 12551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 125630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 125730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() >> SA, E); 12583f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 12591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 126030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LT: return Success(Result.getInt() < RHS, E); 126130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GT: return Success(Result.getInt() > RHS, E); 126230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LE: return Success(Result.getInt() <= RHS, E); 126330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GE: return Success(Result.getInt() >= RHS, E); 126430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::EQ: return Success(Result.getInt() == RHS, E); 126530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::NE: return Success(Result.getInt() != RHS, E); 1266b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 1267a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 1268a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 1269ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopesbool IntExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 1270a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes bool Cond; 1271a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes if (!HandleConversionToBool(E->getCond(), Cond, Info)) 1272ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes return false; 1273ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 1274a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 1275ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes} 1276ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 1277af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattnerunsigned IntExprEvaluator::GetAlignOfType(QualType T) { 12785d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 12795d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 12805d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 12815d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 12825d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = T->getAs<ReferenceType>()) 12835d484e8cf710207010720589d89602233de61d01Sebastian Redl T = Ref->getPointeeType(); 12845d484e8cf710207010720589d89602233de61d01Sebastian Redl 1285e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the alignment. 1286e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner unsigned CharSize = Info.Ctx.Target.getCharWidth(); 128718857644059c45da6776f1a288eec7b4cf3a844aDouglas Gregor 12882be586108bb401019647791feca19ea03fd477ceEli Friedman // __alignof is defined to return the preferred alignment. 128918857644059c45da6776f1a288eec7b4cf3a844aDouglas Gregor return Info.Ctx.getPreferredTypeAlign(T.getTypePtr()) / CharSize; 1290e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1291e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1292af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattnerunsigned IntExprEvaluator::GetAlignOfExpr(const Expr *E) { 1293af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner E = E->IgnoreParens(); 1294af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1295af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // alignof decl is always accepted, even if it doesn't make sense: we default 12961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // to 1 in those cases. 1297af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 12985d484e8cf710207010720589d89602233de61d01Sebastian Redl return Info.Ctx.getDeclAlignInBytes(DRE->getDecl(), /*RefAsPointee*/true); 1299a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1300af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) 13015d484e8cf710207010720589d89602233de61d01Sebastian Redl return Info.Ctx.getDeclAlignInBytes(ME->getMemberDecl(), 13025d484e8cf710207010720589d89602233de61d01Sebastian Redl /*RefAsPointee*/true); 1303af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1304e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(E->getType()); 1305e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1306e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1307e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 13080518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// VisitSizeAlignOfExpr - Evaluate a sizeof or alignof with a result as the 13090518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// expression's type. 13100518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redlbool IntExprEvaluator::VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E) { 1311e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Handle alignof separately. 1312e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!E->isSizeOf()) { 1313e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (E->isArgumentType()) 1314131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(GetAlignOfType(E->getArgumentType()), E); 1315e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner else 1316131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(GetAlignOfExpr(E->getArgumentExpr()), E); 1317e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner } 1318a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 13190518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType SrcTy = E->getTypeOfArgument(); 13205d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 13215d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 13225d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 13235d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 13245d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = SrcTy->getAs<ReferenceType>()) 13255d484e8cf710207010720589d89602233de61d01Sebastian Redl SrcTy = Ref->getPointeeType(); 13260518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 1327131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc 1328131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // extension. 1329131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar if (SrcTy->isVoidType() || SrcTy->isFunctionType()) 1330131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(1, E); 1331a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1332fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. 1333e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!SrcTy->isConstantSizeType()) 1334fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner return false; 1335f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 1336e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the size. 133724cbfb96f09318f59dc73eaaf4909a79788ec5acDaniel Dunbar unsigned BitWidth = Info.Ctx.getTypeSize(SrcTy); 1338ff89666e8d143b52f2bb5d2c3a108125d523abb7Daniel Dunbar return Success(BitWidth / Info.Ctx.Target.getCharWidth(), E); 1339fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner} 1340fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 1341b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 13424c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Special case unary operators that do not need their subexpression 13434c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // evaluated. offsetof/sizeof/alignof are all special. 134435183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (E->isOffsetOfOp()) { 134535183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman // The AST for offsetof is defined in such a way that we can just 134635183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman // directly Evaluate it as an l-value. 134735183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman APValue LV; 134835183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (!EvaluateLValue(E->getSubExpr(), LV, Info)) 134935183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman return false; 135035183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (LV.getLValueBase()) 135135183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman return false; 135235183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman return Success(LV.getLValueOffset(), E); 135335183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman } 1354a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1355a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == UnaryOperator::LNot) { 1356a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // LNot's operand isn't necessarily an integer, so we handle it specially. 1357a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman bool bres; 1358a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!HandleConversionToBool(E->getSubExpr(), bres, Info)) 1359a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1360131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(!bres, E); 1361a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1362a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 13634fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar // Only handle integral operations... 13644fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar if (!E->getSubExpr()->getType()->isIntegralType()) 13654fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar return false; 13664fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar 136787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner // Get the operand value into 'Result'. 136887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!Visit(E->getSubExpr())) 136975a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner return false; 1370a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 137175a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner switch (E->getOpcode()) { 13724c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner default: 137375a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 137475a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // See C99 6.6p3. 13750e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 137675a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Extension: 13774c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // FIXME: Should extension allow i-c-e extension expressions in its scope? 13784c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // If so, we could clear the diagnostic ID. 13793f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 138075a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Plus: 13811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // The result is always just the subexpr. 13823f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 138375a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Minus: 138430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 138530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(-Result.getInt(), E); 138675a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Not: 138730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 138830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(~Result.getInt(), E); 138906a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson } 1390a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 13911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1392732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// HandleCast - This is used to evaluate implicit or explicit casts where the 1393732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// result type is integer. 1394a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarbool IntExprEvaluator::VisitCastExpr(CastExpr *E) { 139582206e267ce6cc709797127616f64672d255b310Anders Carlsson Expr *SubExpr = E->getSubExpr(); 139682206e267ce6cc709797127616f64672d255b310Anders Carlsson QualType DestType = E->getType(); 1397b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar QualType SrcType = SubExpr->getType(); 139882206e267ce6cc709797127616f64672d255b310Anders Carlsson 13994efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (DestType->isBooleanType()) { 14004efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 14014efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(SubExpr, BoolResult, Info)) 14024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1403131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(BoolResult, E); 14044efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 14054efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1406a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson // Handle simple integer->integer casts. 1407b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (SrcType->isIntegralType()) { 1408732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!Visit(SubExpr)) 1409b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1410a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1411be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!Result.isInt()) { 1412be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // Only allow casts of lvalues if they are lossless. 1413be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return Info.Ctx.getTypeSize(DestType) == Info.Ctx.getTypeSize(SrcType); 1414be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 141530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 1416dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, 141730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt(), Info.Ctx), E); 1418732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner } 14191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1420732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner // FIXME: Clean this up! 1421b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (SrcType->isPointerType()) { 1422a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson APValue LV; 142387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(SubExpr, LV, Info)) 1424b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 14254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1426dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (LV.getLValueBase()) { 1427dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar // Only allow based lvalue casts if they are lossless. 1428dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(SrcType)) 1429dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return false; 1430dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar 1431dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar Result = LV; 1432dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return true; 1433dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar } 14344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1435dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar APSInt AsInt = Info.Ctx.MakeIntValue(LV.getLValueOffset(), SrcType); 1436dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, AsInt, Info.Ctx), E); 14372bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 14384efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1439be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (SrcType->isArrayType() || SrcType->isFunctionType()) { 1440be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // This handles double-conversion cases, where there's both 1441be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // an l-value promotion and an implicit conversion to int. 1442be26570e3faa009bdcefedfaf04473e518940520Eli Friedman APValue LV; 1443be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!EvaluateLValue(SubExpr, LV, Info)) 1444be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1445be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1446be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(Info.Ctx.VoidPtrTy)) 1447be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1448be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1449be26570e3faa009bdcefedfaf04473e518940520Eli Friedman Result = LV; 1450be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return true; 1451be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 1452be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 14531725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (SrcType->isAnyComplexType()) { 14541725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APValue C; 14551725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (!EvaluateComplex(SubExpr, C, Info)) 14561725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return false; 14571725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (C.isComplexFloat()) 14581725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleFloatToIntCast(DestType, SrcType, 14591725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexFloatReal(), Info.Ctx), 14601725f683432715e5afe34d476024bd6f16eac3fcEli Friedman E); 14611725f683432715e5afe34d476024bd6f16eac3fcEli Friedman else 14621725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleIntToIntCast(DestType, SrcType, 14631725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexIntReal(), Info.Ctx), E); 14641725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 14652217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // FIXME: Handle vectors 14662217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1467b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (!SrcType->isRealFloatingType()) 14680e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1469732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 1470d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat F(0.0); 1471d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(SubExpr, F, Info)) 14720e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 14731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1474b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar return Success(HandleFloatToIntCast(DestType, SrcType, F, Info.Ctx), E); 1475a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 14762bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 1477722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedmanbool IntExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 1478722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 1479722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman APValue LV; 1480722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1481722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1482722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntReal(), E); 1483722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1484722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1485722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Visit(E->getSubExpr()); 1486722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman} 1487722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1488664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedmanbool IntExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 1489722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isComplexIntegerType()) { 1490722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman APValue LV; 1491722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1492722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1493722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntImag(), E); 1494722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1495722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1496664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 1497664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman Info.EvalResult.HasSideEffects = true; 1498664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 1499664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman} 1500664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 1501f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1502d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman// Float Evaluation 1503d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1504d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1505d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmannamespace { 1506770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass FloatExprEvaluator 1507d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : public StmtVisitor<FloatExprEvaluator, bool> { 1508d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman EvalInfo &Info; 1509d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat &Result; 1510d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanpublic: 1511d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman FloatExprEvaluator(EvalInfo &info, APFloat &result) 1512d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : Info(info), Result(result) {} 1513d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1514d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitStmt(Stmt *S) { 1515d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1516d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1517d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1518d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 1519019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner bool VisitCallExpr(const CallExpr *E); 1520d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 15215db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar bool VisitUnaryOperator(const UnaryOperator *E); 1522d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 1523d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitFloatingLiteral(const FloatingLiteral *E); 15244efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCastExpr(CastExpr *E); 15254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E); 152667f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman bool VisitConditionalOperator(ConditionalOperator *E); 15272217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1528ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) 1529ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 1530ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitUnaryExtension(const UnaryOperator *E) 1531ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 1532ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 1533ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: __real__/__imag__, array subscript of vector, 153467f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman // member of vector, ImplicitValueInitExpr 1535d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman}; 1536d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} // end anonymous namespace 1537d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1538d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) { 1539d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return FloatExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 1540d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1541d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1542019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattnerbool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) { 15433c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 154434a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner default: return false; 1545019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_val: 1546019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_valf: 1547019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_vall: 1548019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inf: 1549019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inff: 15507cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar case Builtin::BI__builtin_infl: { 15517cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 15527cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 155334a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner Result = llvm::APFloat::getInf(Sem); 155434a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner return true; 15557cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar } 15561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15579e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nan: 15589e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanf: 15599e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanl: 15604572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump // If this is __builtin_nan() turn this into a nan, otherwise we 15619e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // can't constant fold it. 15621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const StringLiteral *S = 15639e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner dyn_cast<StringLiteral>(E->getArg(0)->IgnoreParenCasts())) { 15644572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump if (!S->isWide()) { 15657cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 15667cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 1567330358056acf05445273f4f4004dfd283a2ecc4dBenjamin Kramer unsigned Type = 0; 1568330358056acf05445273f4f4004dfd283a2ecc4dBenjamin Kramer if (!S->getString().empty() && S->getString().getAsInteger(0, Type)) 15694572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump return false; 1570330358056acf05445273f4f4004dfd283a2ecc4dBenjamin Kramer Result = llvm::APFloat::getNaN(Sem, false, Type); 15719e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner return true; 15729e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner } 15739e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner } 15749e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner return false; 15755db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 15765db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabs: 15775db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsf: 15785db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsl: 15795db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info)) 15805db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 15811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15825db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (Result.isNegative()) 15835db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 15845db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 15855db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 15861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysign: 15871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysignf: 15885db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignl: { 15895db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.); 15905db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info) || 15915db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar !EvaluateFloat(E->getArg(1), RHS, Info)) 15925db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 15935db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.copySign(RHS); 15945db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 15955db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 1596019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 1597019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner} 1598019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 15995db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbarbool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 1600a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes if (E->getOpcode() == UnaryOperator::Deref) 1601a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes return false; 1602a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes 16035db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getSubExpr(), Result, Info)) 16045db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 16055db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 16065db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar switch (E->getOpcode()) { 16075db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar default: return false; 16081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case UnaryOperator::Plus: 16095db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 16105db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case UnaryOperator::Minus: 16115db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 16125db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 16135db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 16145db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar} 1615019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 1616d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 16177f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (E->getOpcode() == BinaryOperator::Comma) { 16187f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!EvaluateFloat(E->getRHS(), Result, Info)) 16197f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return false; 16207f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 16217f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // If we can't evaluate the LHS, it might have side effects; 16227f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // conservatively mark it. 16237f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 16247f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman Info.EvalResult.HasSideEffects = true; 16257f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 16267f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return true; 16277f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman } 16287f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 1629d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // FIXME: Diagnostics? I really don't understand how the warnings 1630d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // and errors are supposed to work. 16315db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.0); 1632d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getLHS(), Result, Info)) 1633d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1634d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1635d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1636d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1637d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman switch (E->getOpcode()) { 1638d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman default: return false; 1639d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Mul: 1640d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.multiply(RHS, APFloat::rmNearestTiesToEven); 1641d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1642d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Add: 1643d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.add(RHS, APFloat::rmNearestTiesToEven); 1644d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1645d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Sub: 1646d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.subtract(RHS, APFloat::rmNearestTiesToEven); 1647d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1648d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Div: 1649d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.divide(RHS, APFloat::rmNearestTiesToEven); 1650d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1651d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1652d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1653d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1654d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) { 1655d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result = E->getValue(); 1656d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1657d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1658d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 16594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCastExpr(CastExpr *E) { 16604efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* SubExpr = E->getSubExpr(); 16611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isIntegralType()) { 16634efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 16643f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!EvaluateInteger(SubExpr, IntResult, Info)) 16654efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 16661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result = HandleIntToFloatCast(E->getType(), SubExpr->getType(), 1667a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar IntResult, Info.Ctx); 16684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 16694efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 16704efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isRealFloatingType()) { 16714efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!Visit(SubExpr)) 16724efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1673a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(E->getType(), SubExpr->getType(), 1674a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result, Info.Ctx); 16754efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 16764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 16772217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // FIXME: Handle complex types 16784efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 16794efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 16804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 16814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 16824efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) { 16834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(E->getType())); 16844efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 16854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 16864efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 168767f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedmanbool FloatExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 168867f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman bool Cond; 168967f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman if (!HandleConversionToBool(E->getCond(), Cond, Info)) 169067f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman return false; 169167f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman 169267f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 169367f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman} 169467f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman 1695d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1696a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar// Complex Evaluation (for float and integer) 16979ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 16989ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 16999ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonnamespace { 1700770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass ComplexExprEvaluator 1701a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar : public StmtVisitor<ComplexExprEvaluator, APValue> { 17029ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson EvalInfo &Info; 17031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17049ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonpublic: 1705a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar ComplexExprEvaluator(EvalInfo &info) : Info(info) {} 17061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17079ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 17089ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson // Visitor Methods 17099ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 17109ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 17119ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitStmt(Stmt *S) { 17129ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson return APValue(); 17139ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 17141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17159ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 17169ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 17179ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitImaginaryLiteral(ImaginaryLiteral *E) { 1718a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Expr* SubExpr = E->getSubExpr(); 1719a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1720a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (SubExpr->getType()->isRealFloatingType()) { 1721a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat Result(0.0); 1722a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1723a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateFloat(SubExpr, Result, Info)) 1724a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 17251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(APFloat(Result.getSemantics(), APFloat::fcZero, false), 1727a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result); 1728a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 17291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(SubExpr->getType()->isIntegerType() && 1730a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar "Unexpected imaginary literal."); 1731a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1732a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Result; 1733a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateInteger(SubExpr, Result, Info)) 1734a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 17351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1736a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Zero(Result.getBitWidth(), !Result.isSigned()); 1737a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Zero = 0; 1738a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(Zero, Result); 1739a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 17409ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 17419ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 1742ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue VisitCastExpr(CastExpr *E) { 1743ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson Expr* SubExpr = E->getSubExpr(); 1744183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall QualType EltType = E->getType()->getAs<ComplexType>()->getElementType(); 1745a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SubType = SubExpr->getType(); 1746ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1747a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (SubType->isRealFloatingType()) { 1748ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APFloat Result(0.0); 17491725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 1750ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson if (!EvaluateFloat(SubExpr, Result, Info)) 1751ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 17521725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 17531725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (EltType->isRealFloatingType()) { 17541725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Result = HandleFloatToFloatCast(EltType, SubType, Result, Info.Ctx); 17551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(Result, 17561725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APFloat(Result.getSemantics(), APFloat::fcZero, false)); 17571725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } else { 17581725f683432715e5afe34d476024bd6f16eac3fcEli Friedman llvm::APSInt IResult; 17591725f683432715e5afe34d476024bd6f16eac3fcEli Friedman IResult = HandleFloatToIntCast(EltType, SubType, Result, Info.Ctx); 17601725f683432715e5afe34d476024bd6f16eac3fcEli Friedman llvm::APSInt Zero(IResult.getBitWidth(), !IResult.isSigned()); 17611725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Zero = 0; 17621725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return APValue(IResult, Zero); 17631725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 1764a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else if (SubType->isIntegerType()) { 1765a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APSInt Result; 17661725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 1767a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateInteger(SubExpr, Result, Info)) 1768a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 1769a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 17701725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (EltType->isRealFloatingType()) { 17711725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APFloat FResult = 17721725f683432715e5afe34d476024bd6f16eac3fcEli Friedman HandleIntToFloatCast(EltType, SubType, Result, Info.Ctx); 17731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(FResult, 17741725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APFloat(FResult.getSemantics(), APFloat::fcZero, false)); 17751725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } else { 17761725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Result = HandleIntToIntCast(EltType, SubType, Result, Info.Ctx); 17771725f683432715e5afe34d476024bd6f16eac3fcEli Friedman llvm::APSInt Zero(Result.getBitWidth(), !Result.isSigned()); 17781725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Zero = 0; 17791725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return APValue(Result, Zero); 17801725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 1781183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall } else if (const ComplexType *CT = SubType->getAs<ComplexType>()) { 1782a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APValue Src; 17831725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 1784a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (!EvaluateComplex(SubExpr, Src, Info)) 1785a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(); 1786a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1787a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SrcType = CT->getElementType(); 1788a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1789a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (Src.isComplexFloat()) { 1790a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 17911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(HandleFloatToFloatCast(EltType, SrcType, 1792a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatReal(), 1793a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 17941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleFloatToFloatCast(EltType, SrcType, 1795a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatImag(), 1796a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1797a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1798a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleFloatToIntCast(EltType, SrcType, 1799a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatReal(), 1800a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 18011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleFloatToIntCast(EltType, SrcType, 1802a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatImag(), 18031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Info.Ctx)); 1804a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1805a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1806a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar assert(Src.isComplexInt() && "Invalid evaluate result."); 1807a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 18081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(HandleIntToFloatCast(EltType, SrcType, 1809a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntReal(), 1810a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 18111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleIntToFloatCast(EltType, SrcType, 1812a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntImag(), 1813a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1814a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1815a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleIntToIntCast(EltType, SrcType, 1816a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntReal(), 1817a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 18181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleIntToIntCast(EltType, SrcType, 1819a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntImag(), 18201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Info.Ctx)); 1821a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1822a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1823ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1824ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1825ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson // FIXME: Handle more casts. 1826ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1827ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 18281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1829ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue VisitBinaryOperator(const BinaryOperator *E); 1830ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 1831ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 1832ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 1833ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 1834ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME Missing: unary +/-/~, binary div, ImplicitValueInitExpr, 18352217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // conditional ?:, comma 18369ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson}; 18379ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} // end anonymous namespace 18389ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 18391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic bool EvaluateComplex(const Expr *E, APValue &Result, EvalInfo &Info) { 1840a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result = ComplexExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 1841a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar assert((!Result.isComplexFloat() || 18421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (&Result.getComplexFloatReal().getSemantics() == 18431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump &Result.getComplexFloatImag().getSemantics())) && 1844a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar "Invalid complex evaluation."); 1845a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return Result.isComplexFloat() || Result.isComplexInt(); 18469ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} 18479ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 18481eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue ComplexExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 1849ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue Result, RHS; 18501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1851a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getLHS(), Result, Info)) 1852ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 18531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1854a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 1855ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1856a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 18573f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar assert(Result.isComplexFloat() == RHS.isComplexFloat() && 18583f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar "Invalid operands to binary operator."); 1859ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson switch (E->getOpcode()) { 1860ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson default: return APValue(); 1861ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Add: 1862a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 1863a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().add(RHS.getComplexFloatReal(), 1864a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1865a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().add(RHS.getComplexFloatImag(), 1866a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1867a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1868a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() += RHS.getComplexIntReal(); 1869a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() += RHS.getComplexIntImag(); 1870a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 18713f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 1872ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Sub: 1873a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 1874a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().subtract(RHS.getComplexFloatReal(), 1875a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1876a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().subtract(RHS.getComplexFloatImag(), 1877a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1878a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1879a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() -= RHS.getComplexIntReal(); 1880a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() -= RHS.getComplexIntImag(); 1881a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 18823f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 18833f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar case BinaryOperator::Mul: 18843f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar if (Result.isComplexFloat()) { 18853f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APValue LHS = Result; 18863f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_r = LHS.getComplexFloatReal(); 18873f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_i = LHS.getComplexFloatImag(); 18883f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_r = RHS.getComplexFloatReal(); 18893f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_i = RHS.getComplexFloatImag(); 18901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18913f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat Tmp = LHS_r; 18923f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 18933f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal() = Tmp; 18943f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 18953f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 18963f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal().subtract(Tmp, APFloat::rmNearestTiesToEven); 18973f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 18983f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_r; 18993f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 19003f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag() = Tmp; 19013f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 19023f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 19033f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag().add(Tmp, APFloat::rmNearestTiesToEven); 19043f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } else { 19053f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APValue LHS = Result; 19061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntReal() = 19073f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntReal() - 19083f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntImag()); 19091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntImag() = 19103f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntImag() + 19113f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntReal()); 19123f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } 19133f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 1914ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1915ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1916ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return Result; 1917ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson} 1918ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 19199ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 19206ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner// Top level Expr::Evaluate method. 1921f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1922f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 19236ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// Evaluate - Return true if this is a constant which we can fold using 1924019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// any crazy technique (that has nothing to do with language standards) that 1925019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// we want to. If this function returns true, it returns the folded constant 1926019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// in Result. 19275b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlssonbool Expr::Evaluate(EvalResult &Result, ASTContext &Ctx) const { 19285b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson EvalInfo Info(Ctx, Result); 192954da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson 193059b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (getType()->isVectorType()) { 193159b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!EvaluateVector(this, Result.Val, Info)) 193259b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 193359b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else if (getType()->isIntegerType()) { 193430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!IntExprEvaluator(Info, Result.Val).Visit(const_cast<Expr*>(this))) 19356dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 19368958891f5fa1e593c4519a36b3df427ee019d70bDaniel Dunbar } else if (getType()->hasPointerRepresentation()) { 19375b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson if (!EvaluatePointer(this, Result.Val, Info)) 19386dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1939d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } else if (getType()->isRealFloatingType()) { 1940d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman llvm::APFloat f(0.0); 19416dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson if (!EvaluateFloat(this, f, Info)) 19426dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 19431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19445b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson Result.Val = APValue(f); 1945a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else if (getType()->isAnyComplexType()) { 1946a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(this, Result.Val, Info)) 1947660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1948660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else 1949660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1950660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 1951660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return true; 1952660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump} 1953660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 1954660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stumpbool Expr::EvaluateAsAny(EvalResult &Result, ASTContext &Ctx) const { 1955660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump EvalInfo Info(Ctx, Result, true); 1956660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 1957660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (getType()->isVectorType()) { 1958660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (!EvaluateVector(this, Result.Val, Info)) 1959660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1960660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else if (getType()->isIntegerType()) { 1961660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (!IntExprEvaluator(Info, Result.Val).Visit(const_cast<Expr*>(this))) 1962660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1963660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else if (getType()->hasPointerRepresentation()) { 1964660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (!EvaluatePointer(this, Result.Val, Info)) 1965660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1966660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else if (getType()->isRealFloatingType()) { 1967660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump llvm::APFloat f(0.0); 1968660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (!EvaluateFloat(this, f, Info)) 1969660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1970660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 1971660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump Result.Val = APValue(f); 1972660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else if (getType()->isAnyComplexType()) { 1973660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (!EvaluateComplex(this, Result.Val, Info)) 19746dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1975a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else 19769d4c157baaada8945671dc98363a40ed00cbd824Anders Carlsson return false; 19776dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson 19785b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson return true; 19795b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson} 19805b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson 19811b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlssonbool Expr::EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const { 19821b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson EvalInfo Info(Ctx, Result); 19831b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 19841b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson return EvaluateLValue(this, Result.Val, Info) && !Result.HasSideEffects; 19851b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson} 19861b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 1987b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedmanbool Expr::EvaluateAsAnyLValue(EvalResult &Result, ASTContext &Ctx) const { 1988b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman EvalInfo Info(Ctx, Result, true); 1989b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 1990b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman return EvaluateLValue(this, Result.Val, Info) && !Result.HasSideEffects; 1991b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman} 1992b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 19936ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// isEvaluatable - Call Evaluate to see if this expression can be constant 199445b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner/// folded, but discard the result. 199545b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattnerbool Expr::isEvaluatable(ASTContext &Ctx) const { 19964fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson EvalResult Result; 19974fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects; 199845b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner} 199951fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 2000393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanianbool Expr::HasSideEffects(ASTContext &Ctx) const { 2001393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian Expr::EvalResult Result; 2002393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian EvalInfo Info(Ctx, Result); 2003393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return HasSideEffect(Info).Visit(const_cast<Expr*>(this)); 2004393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian} 2005393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian 200651fe996231b1d7199f76e4005ff4c943d5deeecdAnders CarlssonAPSInt Expr::EvaluateAsInt(ASTContext &Ctx) const { 20071c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 20081c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson bool Result = Evaluate(EvalResult, Ctx); 2009f185319f25efd6094870f287030270fad26085baDaniel Dunbar Result = Result; 201051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson assert(Result && "Could not evaluate expression"); 20111c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(EvalResult.Val.isInt() && "Expression did not evaluate to integer"); 201251fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 20131c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson return EvalResult.Val.getInt(); 201451fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson} 2015