ExprConstant.cpp revision 043097507f99b1156bfd8bad41e7d5166ae4b9b6
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" 22c754aa62643e66ab967ca32ae8b0b3fc419bba25Anders Carlsson#include "llvm/Support/Compiler.h" 234572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump#include <cstring> 244572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump 25c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlssonusing namespace clang; 26f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerusing llvm::APSInt; 27d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanusing llvm::APFloat; 28c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson 2987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// EvalInfo - This is a private struct used by the evaluator to capture 3087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// information about a subexpression as it is folded. It retains information 3187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// about the AST context, but also maintains information about the folded 3287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// expression. 3387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// 3487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// If an expression could be evaluated, it is still possible it is not a C 3587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// "integer constant expression" or constant expression. If not, this struct 3687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// captures information about how and why not. 3787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// 3887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// One bit of information passed *into* the request for constant folding 3987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// indicates whether the subexpression is "evaluated" or not according to C 4087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// rules. For example, the RHS of (0 && foo()) is not evaluated. We can 4187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// evaluate the expression regardless of what the RHS is, but C only allows 4287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// certain things in certain situations. 4387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstruct EvalInfo { 4487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner ASTContext &Ctx; 451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4654da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson /// EvalResult - Contains information about the evaluation. 4754da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Expr::EvalResult &EvalResult; 48f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson 49b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman /// AnyLValue - Stack based LValue results are not discarded. 50b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman bool AnyLValue; 51b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 52b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman EvalInfo(ASTContext &ctx, Expr::EvalResult& evalresult, 53b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman bool anylvalue = false) 54b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman : Ctx(ctx), EvalResult(evalresult), AnyLValue(anylvalue) {} 5587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner}; 5687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 5787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 584efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanstatic bool EvaluateLValue(const Expr *E, APValue &Result, EvalInfo &Info); 5987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluatePointer(const Expr *E, APValue &Result, EvalInfo &Info); 6087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluateInteger(const Expr *E, APSInt &Result, EvalInfo &Info); 61d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattnerstatic bool EvaluateIntegerOrLValue(const Expr *E, APValue &Result, 62d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner EvalInfo &Info); 63d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr *E, APFloat &Result, EvalInfo &Info); 64a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbarstatic bool EvaluateComplex(const Expr *E, APValue &Result, EvalInfo &Info); 65f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 66f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 674efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// Misc utilities 684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 694efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 705bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedmanstatic bool EvalPointerValueAsBool(APValue& Value, bool& Result) { 715bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // FIXME: Is this accurate for all kinds of bases? If not, what would 725bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // the check look like? 735bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman Result = Value.getLValueBase() || Value.getLValueOffset(); 745bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return true; 755bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman} 765bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman 774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanstatic bool HandleConversionToBool(Expr* E, bool& Result, EvalInfo &Info) { 784efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->getType()->isIntegralType()) { 794efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateInteger(E, IntResult, Info)) 814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 824efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = IntResult != 0; 834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 844efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else if (E->getType()->isRealFloatingType()) { 854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APFloat FloatResult(0.0); 864efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateFloat(E, FloatResult, Info)) 874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = !FloatResult.isZero(); 894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 90a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->hasPointerRepresentation()) { 914efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue PointerResult; 924efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluatePointer(E, PointerResult, Info)) 934efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 945bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return EvalPointerValueAsBool(PointerResult, Result); 95a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->isAnyComplexType()) { 96a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman APValue ComplexResult; 97a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (!EvaluateComplex(E, ComplexResult, Info)) 98a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return false; 99a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (ComplexResult.isComplexFloat()) { 100a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = !ComplexResult.getComplexFloatReal().isZero() || 101a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman !ComplexResult.getComplexFloatImag().isZero(); 102a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else { 103a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = ComplexResult.getComplexIntReal().getBoolValue() || 104a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman ComplexResult.getComplexIntImag().getBoolValue(); 105a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } 106a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return true; 1074efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 1084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 1114efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleFloatToIntCast(QualType DestType, QualType SrcType, 113a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat &Value, ASTContext &Ctx) { 114a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 115a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Determine whether we are converting to unsigned or signed. 116a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool DestSigned = DestType->isSignedIntegerType(); 1171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 118a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // FIXME: Warning for overflow. 119a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar uint64_t Space[4]; 120a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 121a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar (void)Value.convertToInteger(Space, DestWidth, DestSigned, 122a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar llvm::APFloat::rmTowardZero, &ignored); 123a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APSInt(llvm::APInt(DestWidth, 4, Space), !DestSigned); 124a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 125a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleFloatToFloatCast(QualType DestType, QualType SrcType, 127a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat &Value, ASTContext &Ctx) { 128a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 129a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result = Value; 1301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.convert(Ctx.getFloatTypeSemantics(DestType), 131a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven, &ignored); 132a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 133a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 134a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleIntToIntCast(QualType DestType, QualType SrcType, 136a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt &Value, ASTContext &Ctx) { 137a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 138a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt Result = Value; 139a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Figure out if this is a truncate, extend or noop cast. 140a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // If the input is signed, do a sign extend, noop, or truncate. 141a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.extOrTrunc(DestWidth); 142a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.setIsUnsigned(DestType->isUnsignedIntegerType()); 143a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 144a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 145a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleIntToFloatCast(QualType DestType, QualType SrcType, 147a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt &Value, ASTContext &Ctx) { 148a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 149a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result(Ctx.getFloatTypeSemantics(DestType), 1); 150a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.convertFromAPInt(Value, Value.isSigned(), 151a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven); 152a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 153a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 154a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 155c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumpnamespace { 156c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumpclass VISIBILITY_HIDDEN HasSideEffect 157c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump : public StmtVisitor<HasSideEffect, bool> { 158c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump EvalInfo &Info; 159c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumppublic: 160c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 161c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump HasSideEffect(EvalInfo &info) : Info(info) {} 162c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 163c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // Unhandled nodes conservatively default to having side effects. 164c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitStmt(Stmt *S) { 165c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 166c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 167c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 168c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 169c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitDeclRefExpr(DeclRefExpr *E) { 170df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (Info.Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 171c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 172c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return false; 173c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 174c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // We don't want to evaluate BlockExprs multiple times, as they generate 175c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // a ton of code. 176c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitBlockExpr(BlockExpr *E) { return true; } 177c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitPredefinedExpr(PredefinedExpr *E) { return false; } 178c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitCompoundLiteralExpr(CompoundLiteralExpr *E) 179c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump { return Visit(E->getInitializer()); } 180c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitMemberExpr(MemberExpr *E) { return Visit(E->getBase()); } 181c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitIntegerLiteral(IntegerLiteral *E) { return false; } 182c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitFloatingLiteral(FloatingLiteral *E) { return false; } 183c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitStringLiteral(StringLiteral *E) { return false; } 184c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitCharacterLiteral(CharacterLiteral *E) { return false; } 185c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E) { return false; } 186c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitArraySubscriptExpr(ArraySubscriptExpr *E) 187980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 188c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitChooseExpr(ChooseExpr *E) 189c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump { return Visit(E->getChosenSubExpr(Info.Ctx)); } 190c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitCastExpr(CastExpr *E) { return Visit(E->getSubExpr()); } 191c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitBinAssign(BinaryOperator *E) { return true; } 1923f0147e161df4725ff15fbb731f4f727afcc229fMike Stump bool VisitCompoundAssignOperator(BinaryOperator *E) { return true; } 193980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump bool VisitBinaryOperator(BinaryOperator *E) 194980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 195c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPreInc(UnaryOperator *E) { return true; } 196c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPostInc(UnaryOperator *E) { return true; } 197c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPreDec(UnaryOperator *E) { return true; } 198c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPostDec(UnaryOperator *E) { return true; } 199c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryDeref(UnaryOperator *E) { 200df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (Info.Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 201c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 202980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump return Visit(E->getSubExpr()); 203c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 204c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryOperator(UnaryOperator *E) { return Visit(E->getSubExpr()); } 205c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump}; 206c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 207c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump} // end anonymous namespace 208c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 2094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 2104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// LValue Evaluation 2114efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 2124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmannamespace { 2134efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanclass VISIBILITY_HIDDEN LValueExprEvaluator 2144efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman : public StmtVisitor<LValueExprEvaluator, APValue> { 2154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman EvalInfo &Info; 2164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanpublic: 2171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman LValueExprEvaluator(EvalInfo &info) : Info(info) {} 2194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitStmt(Stmt *S) { 2214efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 2224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2244efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 22535873c49adad211ff466e34342a52665742794f5Anders Carlsson APValue VisitDeclRefExpr(DeclRefExpr *E); 2263aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff APValue VisitBlockExpr(BlockExpr *E); 2274efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitPredefinedExpr(PredefinedExpr *E) { return APValue(E, 0); } 2284efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitCompoundLiteralExpr(CompoundLiteralExpr *E); 2294efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitMemberExpr(MemberExpr *E); 2304efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitStringLiteral(StringLiteral *E) { return APValue(E, 0); } 231eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner APValue VisitObjCEncodeExpr(ObjCEncodeExpr *E) { return APValue(E, 0); } 2323068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue VisitArraySubscriptExpr(ArraySubscriptExpr *E); 233e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman APValue VisitUnaryDeref(UnaryOperator *E); 234ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 235ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 236ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 237ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 23826bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson 23926bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson APValue VisitCastExpr(CastExpr *E) { 24026bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson switch (E->getCastKind()) { 24126bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson default: 24226bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson return APValue(); 24326bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson 24426bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson case CastExpr::CK_NoOp: 24526bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson return Visit(E->getSubExpr()); 24626bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 24726bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 248ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: __real__, __imag__ 2494efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman}; 2504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} // end anonymous namespace 2514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2524efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanstatic bool EvaluateLValue(const Expr* E, APValue& Result, EvalInfo &Info) { 2534efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = LValueExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 2544efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result.isLValue(); 2554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 2564efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2571eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue LValueExprEvaluator::VisitDeclRefExpr(DeclRefExpr *E) { 25850c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (isa<FunctionDecl>(E->getDecl())) { 25950c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman return APValue(E, 0); 26050c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } else if (VarDecl* VD = dyn_cast<VarDecl>(E->getDecl())) { 261b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman if (!Info.AnyLValue && !VD->hasGlobalStorage()) 262d933a0198f3ccce9c73bf2951625315b911d37bfEli Friedman return APValue(); 26350c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (!VD->getType()->isReferenceType()) 26450c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman return APValue(E, 0); 265d933a0198f3ccce9c73bf2951625315b911d37bfEli Friedman // FIXME: Check whether VD might be overridden! 266cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor const VarDecl *Def = 0; 267cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor if (const Expr *Init = VD->getDefinition(Def)) 268cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor return Visit(const_cast<Expr *>(Init)); 26950c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } 27050c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman 27150c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman return APValue(); 27235873c49adad211ff466e34342a52665742794f5Anders Carlsson} 27335873c49adad211ff466e34342a52665742794f5Anders Carlsson 2741eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue LValueExprEvaluator::VisitBlockExpr(BlockExpr *E) { 2753aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff if (E->hasBlockDeclRefExprs()) 2763aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff return APValue(); 2771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2783aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff return APValue(E, 0); 2793aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff} 2803aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff 2814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue LValueExprEvaluator::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 282b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman if (!Info.AnyLValue && !E->isFileScope()) 283b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman return APValue(); 284b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman return APValue(E, 0); 2854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 2864efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue LValueExprEvaluator::VisitMemberExpr(MemberExpr *E) { 2884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue result; 2894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman QualType Ty; 2904efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->isArrow()) { 2914efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluatePointer(E->getBase(), result, Info)) 2924efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 2936217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek Ty = E->getBase()->getType()->getAs<PointerType>()->getPointeeType(); 2944efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else { 2954efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result = Visit(E->getBase()); 2964efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (result.isUninit()) 2974efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 2984efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Ty = E->getBase()->getType(); 2994efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3004efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3016217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *RD = Ty->getAs<RecordType>()->getDecl(); 3024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 30386f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 30486f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor FieldDecl *FD = dyn_cast<FieldDecl>(E->getMemberDecl()); 30586f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (!FD) // FIXME: deal with other kinds of member expressions 30686f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return APValue(); 3072be586108bb401019647791feca19ea03fd477ceEli Friedman 3082be586108bb401019647791feca19ea03fd477ceEli Friedman if (FD->getType()->isReferenceType()) 3092be586108bb401019647791feca19ea03fd477ceEli Friedman return APValue(); 3102be586108bb401019647791feca19ea03fd477ceEli Friedman 3114efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // FIXME: This is linear time. 31244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor unsigned i = 0; 31317945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = RD->field_begin(), 31417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = RD->field_end(); 31544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; (void)++Field, ++i) { 31644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (*Field == FD) 3174efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman break; 3184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result.setLValue(result.getLValueBase(), 3214efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result.getLValueOffset() + RL.getFieldOffset(i) / 8); 3224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return result; 3244efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 3254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3261eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue LValueExprEvaluator::VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 3273068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue Result; 3281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3293068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getBase(), Result, Info)) 3303068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return APValue(); 3311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3323068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APSInt Index; 3333068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluateInteger(E->getIdx(), Index, Info)) 3343068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return APValue(); 3353068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 3363068d117951a8df54bae9db039b56201ab10962bAnders Carlsson uint64_t ElementSize = Info.Ctx.getTypeSize(E->getType()) / 8; 3373068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 3383068d117951a8df54bae9db039b56201ab10962bAnders Carlsson uint64_t Offset = Index.getSExtValue() * ElementSize; 3391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.setLValue(Result.getLValueBase(), 3403068d117951a8df54bae9db039b56201ab10962bAnders Carlsson Result.getLValueOffset() + Offset); 3413068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return Result; 3423068d117951a8df54bae9db039b56201ab10962bAnders Carlsson} 3434efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3441eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue LValueExprEvaluator::VisitUnaryDeref(UnaryOperator *E) { 345e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman APValue Result; 346e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman if (!EvaluatePointer(E->getSubExpr(), Result, Info)) 347e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman return APValue(); 348e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman return Result; 349e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman} 350e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman 3514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 352f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Pointer Evaluation 353f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 354f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 355c754aa62643e66ab967ca32ae8b0b3fc419bba25Anders Carlssonnamespace { 3562bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonclass VISIBILITY_HIDDEN PointerExprEvaluator 3572bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson : public StmtVisitor<PointerExprEvaluator, APValue> { 35887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 3592bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonpublic: 3601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 36187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner PointerExprEvaluator(EvalInfo &info) : Info(info) {} 362f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 3632bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson APValue VisitStmt(Stmt *S) { 3642bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson return APValue(); 3652bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 3662bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 3672bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 3682bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 369650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue VisitBinaryOperator(const BinaryOperator *E); 370650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue VisitCastExpr(const CastExpr* E); 3712217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 3722217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman { return Visit(E->getSubExpr()); } 3732217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman APValue VisitUnaryAddrOf(const UnaryOperator *E); 3744efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitObjCStringLiteral(ObjCStringLiteral *E) 3754efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman { return APValue(E, 0); } 376f01158941ba4560c63150032073bb231ce38999eEli Friedman APValue VisitAddrLabelExpr(AddrLabelExpr *E) 377f01158941ba4560c63150032073bb231ce38999eEli Friedman { return APValue(E, 0); } 3783941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman APValue VisitCallExpr(CallExpr *E); 379b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump APValue VisitBlockExpr(BlockExpr *E) { 380b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump if (!E->hasBlockDeclRefExprs()) 381b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump return APValue(E, 0); 382b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump return APValue(); 383b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump } 38491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) 38591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return APValue((Expr*)0, 0); } 3864efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitConditionalOperator(ConditionalOperator *E); 387ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(ChooseExpr *E) 3886e8ed16ffef02b82995a90bdcf10ffff7d63839aSebastian Redl { return Visit(E->getChosenSubExpr(Info.Ctx)); } 3896e8ed16ffef02b82995a90bdcf10ffff7d63839aSebastian Redl APValue VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) 3906e8ed16ffef02b82995a90bdcf10ffff7d63839aSebastian Redl { return APValue((Expr*)0, 0); } 391ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: @protocol, @selector 3922bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson}; 393f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 3942bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 39587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluatePointer(const Expr* E, APValue& Result, EvalInfo &Info) { 3968958891f5fa1e593c4519a36b3df427ee019d70bDaniel Dunbar if (!E->getType()->hasPointerRepresentation()) 397f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return false; 39887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner Result = PointerExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 399f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return Result.isLValue(); 400f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 401650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 402f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris LattnerAPValue PointerExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 403650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() != BinaryOperator::Add && 404650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson E->getOpcode() != BinaryOperator::Sub) 405650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 4061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 407650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *PExp = E->getLHS(); 408650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *IExp = E->getRHS(); 409650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (IExp->getType()->isPointerType()) 410f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner std::swap(PExp, IExp); 4111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 412650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue ResultLValue; 41387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(PExp, ResultLValue, Info)) 414650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 4151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 416650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson llvm::APSInt AdditionalOffset(32); 41787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluateInteger(IExp, AdditionalOffset, Info)) 418650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 419650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 4206217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek QualType PointeeType = PExp->getType()->getAs<PointerType>()->getPointeeType(); 4214d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson uint64_t SizeOfPointee; 4221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4234d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson // Explicitly handle GNU void* and function pointer arithmetic extensions. 4244d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson if (PointeeType->isVoidType() || PointeeType->isFunctionType()) 4254d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson SizeOfPointee = 1; 4264d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson else 4274d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson SizeOfPointee = Info.Ctx.getTypeSize(PointeeType) / 8; 4284efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 429650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson uint64_t Offset = ResultLValue.getLValueOffset(); 4304efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 431650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() == BinaryOperator::Add) 4324efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Offset += AdditionalOffset.getLimitedValue() * SizeOfPointee; 433650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson else 4344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Offset -= AdditionalOffset.getLimitedValue() * SizeOfPointee; 4354efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 436650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(ResultLValue.getLValueBase(), Offset); 437650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 4384efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4392217c87bdc5ab357046a5453bdb06f469c41024eEli FriedmanAPValue PointerExprEvaluator::VisitUnaryAddrOf(const UnaryOperator *E) { 4402217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman APValue result; 4412217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman if (EvaluateLValue(E->getSubExpr(), result, Info)) 4422217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman return result; 4434efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 4444efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 4451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 446650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 447b542afe02d317411d53b3541946f9f2a8f509a11Chris LattnerAPValue PointerExprEvaluator::VisitCastExpr(const CastExpr* E) { 448650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr* SubExpr = E->getSubExpr(); 449650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 450650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson // Check for pointer->pointer cast 45114108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff if (SubExpr->getType()->isPointerType() || 452c1eb14a66fdd955aff3f957a5843295f27952bddAnders Carlsson SubExpr->getType()->isObjCObjectPointerType() || 453c1eb14a66fdd955aff3f957a5843295f27952bddAnders Carlsson SubExpr->getType()->isNullPtrType()) { 454650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue Result; 45587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (EvaluatePointer(SubExpr, Result, Info)) 456650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return Result; 457f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return APValue(); 458650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 4591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 460d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman if (SubExpr->getType()->isIntegralType()) { 46169ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar APValue Result; 46269ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (!EvaluateIntegerOrLValue(SubExpr, Result, Info)) 46369ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return APValue(); 46469ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 46569ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (Result.isInt()) { 46669ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar Result.getInt().extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 46769ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return APValue(0, Result.getInt().getZExtValue()); 468650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 4691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 47069ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar // Cast is of an lvalue, no need to change value. 47169ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return Result; 472650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 4734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4744efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isFunctionType() || 4753aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff SubExpr->getType()->isBlockPointerType() || 4764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman SubExpr->getType()->isArrayType()) { 4774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue Result; 4784efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluateLValue(SubExpr, Result, Info)) 4794efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result; 4804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 4814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 4824efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 483650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 4841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 485650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 4863941b18b8e441c8c466efecd557de60b9a32d10bEli FriedmanAPValue PointerExprEvaluator::VisitCallExpr(CallExpr *E) { 4871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (E->isBuiltinCall(Info.Ctx) == 4883c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor Builtin::BI__builtin___CFStringMakeConstantString) 4893941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman return APValue(E, 0); 4903941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman return APValue(); 4913941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman} 4923941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman 4934efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue PointerExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 4944efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 4954efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 4964efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 4974efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4984efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 4994efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5004efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue Result; 5014efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluatePointer(EvalExpr, Result, Info)) 5024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result; 5034efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 5044efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 505f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 506f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 50759b5da6d853b4368b984700315adf7b37de05764Nate Begeman// Vector Evaluation 50859b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 50959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 51059b5da6d853b4368b984700315adf7b37de05764Nate Begemannamespace { 51159b5da6d853b4368b984700315adf7b37de05764Nate Begeman class VISIBILITY_HIDDEN VectorExprEvaluator 51259b5da6d853b4368b984700315adf7b37de05764Nate Begeman : public StmtVisitor<VectorExprEvaluator, APValue> { 51359b5da6d853b4368b984700315adf7b37de05764Nate Begeman EvalInfo &Info; 51491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue GetZeroVector(QualType VecType); 51559b5da6d853b4368b984700315adf7b37de05764Nate Begeman public: 5161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 51759b5da6d853b4368b984700315adf7b37de05764Nate Begeman VectorExprEvaluator(EvalInfo &info) : Info(info) {} 5181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 51959b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitStmt(Stmt *S) { 52059b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 52159b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 5221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 52391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitParenExpr(ParenExpr *E) 52491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 52591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 52691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 52791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryPlus(const UnaryOperator *E) 52891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 52991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryReal(const UnaryOperator *E) 53091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 53191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) 53291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return GetZeroVector(E->getType()); } 53359b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCastExpr(const CastExpr* E); 53459b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 53559b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitInitListExpr(const InitListExpr *E); 53691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitConditionalOperator(const ConditionalOperator *E); 537ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 538ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 53991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryImag(const UnaryOperator *E); 54091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // FIXME: Missing: unary -, unary ~, binary add/sub/mul/div, 5412217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // binary comparisons, binary and/or/xor, 54291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // shufflevector, ExtVectorElementExpr 54391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // (Note that these require implementing conversions 54491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // between vector types.) 54559b5da6d853b4368b984700315adf7b37de05764Nate Begeman }; 54659b5da6d853b4368b984700315adf7b37de05764Nate Begeman} // end anonymous namespace 54759b5da6d853b4368b984700315adf7b37de05764Nate Begeman 54859b5da6d853b4368b984700315adf7b37de05764Nate Begemanstatic bool EvaluateVector(const Expr* E, APValue& Result, EvalInfo &Info) { 54959b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!E->getType()->isVectorType()) 55059b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 55159b5da6d853b4368b984700315adf7b37de05764Nate Begeman Result = VectorExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 55259b5da6d853b4368b984700315adf7b37de05764Nate Begeman return !Result.isUninit(); 55359b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 55459b5da6d853b4368b984700315adf7b37de05764Nate Begeman 55559b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue VectorExprEvaluator::VisitCastExpr(const CastExpr* E) { 556183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VTy = E->getType()->getAs<VectorType>(); 557c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman QualType EltTy = VTy->getElementType(); 558c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned NElts = VTy->getNumElements(); 559c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned EltWidth = Info.Ctx.getTypeSize(EltTy); 5601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 56159b5da6d853b4368b984700315adf7b37de05764Nate Begeman const Expr* SE = E->getSubExpr(); 562e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman QualType SETy = SE->getType(); 563e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APValue Result = APValue(); 56459b5da6d853b4368b984700315adf7b37de05764Nate Begeman 565e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman // Check for vector->vector bitcast and scalar->vector splat. 566e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman if (SETy->isVectorType()) { 56759b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(SE)); 568e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isIntegerType()) { 569e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APSInt IntResult; 570d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateInteger(SE, IntResult, Info)) 571d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 572d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(IntResult); 573e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isRealFloatingType()) { 574e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APFloat F(0.0); 575d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateFloat(SE, F, Info)) 576d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 577d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(F); 578d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar } else 579c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 58059b5da6d853b4368b984700315adf7b37de05764Nate Begeman 581c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to ExtVector, convert the scalar to the element type 582c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // and splat it to all elements. 583c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (E->getType()->isExtVectorType()) { 584c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType() && Result.isInt()) 585c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToIntCast(EltTy, SETy, Result.getInt(), 586c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 587c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isIntegerType()) 588c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToIntCast(EltTy, SETy, Result.getFloat(), 589c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 590c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType() && Result.isInt()) 591c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToFloatCast(EltTy, SETy, Result.getInt(), 592c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 593c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 594c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToFloatCast(EltTy, SETy, Result.getFloat(), 595c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 596c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 597c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 598c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 599c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // Splat and create vector APValue. 600c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts(NElts, Result); 601c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 602e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } 603c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 604c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to regular gcc-style vector type, bitcast the scalar 605c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // to the vector. To construct the APValue vector initializer, bitcast the 606c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // initializing value to an APInt, and shift out the bits pertaining to each 607c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // element. 608c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman APSInt Init; 609c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init = Result.isInt() ? Result.getInt() : Result.getFloat().bitcastToAPInt(); 6101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 611c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts; 612c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman for (unsigned i = 0; i != NElts; ++i) { 613c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman APSInt Tmp = Init; 614c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Tmp.extOrTrunc(EltWidth); 6151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 616c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType()) 617c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(Tmp)); 618c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 619c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(APFloat(Tmp))); 620c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 621c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 622c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 623c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init >>= EltWidth; 624c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman } 625c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 62659b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 62759b5da6d853b4368b984700315adf7b37de05764Nate Begeman 6281eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 62959b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 63059b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(E->getInitializer())); 63159b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 63259b5da6d853b4368b984700315adf7b37de05764Nate Begeman 6331eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 63459b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 635183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = E->getType()->getAs<VectorType>(); 63659b5da6d853b4368b984700315adf7b37de05764Nate Begeman unsigned NumInits = E->getNumInits(); 63791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman unsigned NumElements = VT->getNumElements(); 6381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 63959b5da6d853b4368b984700315adf7b37de05764Nate Begeman QualType EltTy = VT->getElementType(); 64059b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::SmallVector<APValue, 4> Elements; 64159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 64291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman for (unsigned i = 0; i < NumElements; i++) { 64359b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (EltTy->isIntegerType()) { 64459b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APSInt sInt(32); 64591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (i < NumInits) { 64691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!EvaluateInteger(E->getInit(i), sInt, Info)) 64791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 64891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 64991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman sInt = Info.Ctx.MakeIntValue(0, EltTy); 65091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 65159b5da6d853b4368b984700315adf7b37de05764Nate Begeman Elements.push_back(APValue(sInt)); 65259b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else { 65359b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APFloat f(0.0); 65491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (i < NumInits) { 65591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!EvaluateFloat(E->getInit(i), f, Info)) 65691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 65791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 65891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman f = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy)); 65991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 66059b5da6d853b4368b984700315adf7b37de05764Nate Begeman Elements.push_back(APValue(f)); 66159b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 66259b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 66359b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(&Elements[0], Elements.size()); 66459b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 66559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 6661eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 66791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanVectorExprEvaluator::GetZeroVector(QualType T) { 668183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = T->getAs<VectorType>(); 66991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman QualType EltTy = VT->getElementType(); 67091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue ZeroElement; 67191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EltTy->isIntegerType()) 67291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = APValue(Info.Ctx.MakeIntValue(0, EltTy)); 67391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman else 67491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = 67591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue(APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy))); 67691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 67791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman llvm::SmallVector<APValue, 4> Elements(VT->getNumElements(), ZeroElement); 67891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(&Elements[0], Elements.size()); 67991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 68091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 68191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 68291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman bool BoolResult; 68391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 68491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 68591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 68691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 68791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 68891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue Result; 68991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EvaluateVector(EvalExpr, Result, Info)) 69091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return Result; 69191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 69291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 69391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 69491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 69591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 69691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Info.EvalResult.HasSideEffects = true; 69791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return GetZeroVector(E->getType()); 69891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 69991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 70059b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 701f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Integer Evaluation 702f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 703f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 704f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnernamespace { 705f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerclass VISIBILITY_HIDDEN IntExprEvaluator 706b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner : public StmtVisitor<IntExprEvaluator, bool> { 70787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 70830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue &Result; 709f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerpublic: 71030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar IntExprEvaluator(EvalInfo &info, APValue &result) 71187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner : Info(info), Result(result) {} 712f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 7133f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar bool Success(const llvm::APSInt &SI, const Expr *E) { 7144fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar assert(E->getType()->isIntegralType() && "Invalid evaluation result."); 71530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.isSigned() == E->getType()->isSignedIntegerType() && 7163f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 71730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 7183f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 71930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(SI); 7203f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 7213f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 7223f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 723131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(const llvm::APInt &I, const Expr *E) { 7244fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar assert(E->getType()->isIntegralType() && "Invalid evaluation result."); 72530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(I.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 7263f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 72730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(APSInt(I)); 72830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt().setIsUnsigned(E->getType()->isUnsignedIntegerType()); 729131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 730131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 731131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 732131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(uint64_t Value, const Expr *E) { 7334fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar assert(E->getType()->isIntegralType() && "Invalid evaluation result."); 73430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(Info.Ctx.MakeIntValue(Value, E->getType())); 735131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 736131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 737131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 73882206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Error(SourceLocation L, diag::kind D, const Expr *E) { 73932fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // Take the first error. 74054da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson if (Info.EvalResult.Diag == 0) { 74154da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.DiagLoc = L; 74254da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.Diag = D; 74382206e267ce6cc709797127616f64672d255b310Anders Carlsson Info.EvalResult.DiagExpr = E; 74432fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 74554176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return false; 7467a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner } 7471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 748f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 749f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner // Visitor Methods 750f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 7511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 75232fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitStmt(Stmt *) { 75332fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner assert(0 && "This should be called on integers, stmts are not integers"); 75432fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner return false; 75532fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 7561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 75732fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitExpr(Expr *E) { 7580e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 759f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner } 7601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 761b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 762f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 7634c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitIntegerLiteral(const IntegerLiteral *E) { 764131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 7654c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 7664c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCharacterLiteral(const CharacterLiteral *E) { 767131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 7684c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 7694c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitTypesCompatibleExpr(const TypesCompatibleExpr *E) { 770ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // Per gcc docs "this built-in function ignores top level 771ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // qualifiers". We need to use the canonical version to properly 772ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // be able to strip CRV qualifiers from the type. 773ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T0 = Info.Ctx.getCanonicalType(E->getArgType1()); 774ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T1 = Info.Ctx.getCanonicalType(E->getArgType2()); 7751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(Info.Ctx.typesAreCompatible(T0.getUnqualifiedType(), 776131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar T1.getUnqualifiedType()), 777131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 7784c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 779043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 780043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool CheckReferencedDecl(const Expr *E, const Decl *D); 781043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitDeclRefExpr(const DeclRefExpr *E) { 782043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return CheckReferencedDecl(E, E->getDecl()); 783043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 784043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitMemberExpr(const MemberExpr *E) { 785043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (CheckReferencedDecl(E, E->getMemberDecl())) { 786043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman // Conservatively assume a MemberExpr will have side-effects 787043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman Info.EvalResult.HasSideEffects = true; 788043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return true; 789043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 790043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return false; 791043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 792043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 7934c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCallExpr(const CallExpr *E); 794b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitBinaryOperator(const BinaryOperator *E); 795b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitUnaryOperator(const UnaryOperator *E); 796ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes bool VisitConditionalOperator(const ConditionalOperator *E); 797f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 798a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool VisitCastExpr(CastExpr* E); 7990518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl bool VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E); 8000518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 8013068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 802131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 8033068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 8041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8053f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson bool VisitGNUNullExpr(const GNUNullExpr *E) { 806131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 8073f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson } 8081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8093068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXZeroInitValueExpr(const CXXZeroInitValueExpr *E) { 810131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 8113068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 8123068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 813664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { 814664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 815664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman } 816664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 81764b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) { 8185e03f9ea8174ae588c5e69ec6b5ef4c68f8fd766Douglas Gregor return Success(E->EvaluateTrait(Info.Ctx), E); 81964b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl } 82064b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl 821ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) { 822ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman return Visit(E->getChosenSubExpr(Info.Ctx)); 823ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman } 824ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 825722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman bool VisitUnaryReal(const UnaryOperator *E); 826664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitUnaryImag(const UnaryOperator *E); 827664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 828fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattnerprivate: 829af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner unsigned GetAlignOfExpr(const Expr *E); 830af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner unsigned GetAlignOfType(QualType T); 831664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman // FIXME: Missing: array subscript of vector, member of vector 832f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner}; 833f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 834f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 83569ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateIntegerOrLValue(const Expr* E, APValue &Result, EvalInfo &Info) { 8363f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!E->getType()->isIntegralType()) 8373f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return false; 8381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 83969ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return IntExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 84069ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar} 84169ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 84269ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateInteger(const Expr* E, APSInt &Result, EvalInfo &Info) { 84330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue Val; 84469ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (!EvaluateIntegerOrLValue(E, Val, Info) || !Val.isInt()) 84530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 84630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = Val.getInt(); 84730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return true; 848f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 849f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 850043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedmanbool IntExprEvaluator::CheckReferencedDecl(const Expr* E, const Decl* D) { 8514c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Enums are integer constant exprs. 852043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (const EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(D)) { 853e9a0f43927041e2bcc89140c338dfae207ad3c3bEli Friedman // FIXME: This is an ugly hack around the fact that enums don't set their 8543f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // signedness consistently; see PR3173. 855043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman APSInt SI = ECD->getInitVal(); 8563f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar SI.setIsUnsigned(!E->getType()->isSignedIntegerType()); 8573f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // FIXME: This is an ugly hack around the fact that enums don't 8583f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // set their width (!?!) consistently; see PR3173. 8593f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar SI.extOrTrunc(Info.Ctx.getIntWidth(E->getType())); 8603f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(SI, E); 8614c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 862b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 863b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl // In C++, const, non-volatile integers initialized with ICEs are ICEs. 864e1646da3bb0fe97b372e5fe8cefc537b22048fc4Eli Friedman // In C, they can also be folded, although they are not ICEs. 865cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor if (Info.Ctx.getCanonicalType(E->getType()).getCVRQualifiers() 866cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor == Qualifiers::Const) { 867043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 868cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor const VarDecl *Def = 0; 869043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (const Expr *Init = VD->getDefinition(Def)) { 870043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (APValue *V = VD->getEvaluatedValue()) 871cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor return Success(V->getInt(), E); 872cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor 87378d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor if (Visit(const_cast<Expr*>(Init))) { 87478d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor // Cache the evaluated value in the variable declaration. 875043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman VD->setEvaluatedValue(Info.Ctx, Result); 87678d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return true; 87778d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 87878d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor 87978d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return false; 88078d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 881b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 882b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 883b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 8844c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Otherwise, random variable references are not constants. 8850e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 8864c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 8874c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner 888a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way 889a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// as GCC. 890a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattnerstatic int EvaluateBuiltinClassifyType(const CallExpr *E) { 891a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // The following enum mimics the values returned by GCC. 8927c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl // FIXME: Does GCC differ between lvalue and rvalue references here? 893a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enum gcc_type_class { 894a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner no_type_class = -1, 895a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner void_type_class, integer_type_class, char_type_class, 896a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enumeral_type_class, boolean_type_class, 897a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner pointer_type_class, reference_type_class, offset_type_class, 898a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner real_type_class, complex_type_class, 899a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner function_type_class, method_type_class, 900a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner record_type_class, union_type_class, 901a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner array_type_class, string_type_class, 902a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner lang_type_class 903a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner }; 9041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If no argument was supplied, default to "no_type_class". This isn't 906a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // ideal, however it is what gcc does. 907a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (E->getNumArgs() == 0) 908a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return no_type_class; 9091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 910a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner QualType ArgTy = E->getArg(0)->getType(); 911a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (ArgTy->isVoidType()) 912a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return void_type_class; 913a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isEnumeralType()) 914a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return enumeral_type_class; 915a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isBooleanType()) 916a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return boolean_type_class; 917a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isCharType()) 918a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return string_type_class; // gcc doesn't appear to use char_type_class 919a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isIntegerType()) 920a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return integer_type_class; 921a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isPointerType()) 922a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return pointer_type_class; 923a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isReferenceType()) 924a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return reference_type_class; 925a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isRealType()) 926a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return real_type_class; 927a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isComplexType()) 928a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return complex_type_class; 929a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isFunctionType()) 930a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return function_type_class; 931a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isStructureType()) 932a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return record_type_class; 933a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 934a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 935a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isArrayType()) 936a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return array_type_class; 937a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 938a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 939a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else // FIXME: offset_type_class, method_type_class, & lang_type_class? 940a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner assert(0 && "CallExpr::isBuiltinClassifyType(): unimplemented type"); 941a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return -1; 942a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner} 943a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 9444c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattnerbool IntExprEvaluator::VisitCallExpr(const CallExpr *E) { 9453c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 946019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner default: 9470e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 94864eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 94964eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump case Builtin::BI__builtin_object_size: { 95064eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump const Expr *Arg = E->getArg(0)->IgnoreParens(); 95164eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump Expr::EvalResult Base; 952660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (Arg->EvaluateAsAny(Base, Info.Ctx) 95364eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump && Base.Val.getKind() == APValue::LValue 95464eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump && !Base.HasSideEffects) 95564eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump if (const Expr *LVBase = Base.Val.getLValueBase()) 95664eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(LVBase)) { 95764eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) { 958460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump if (!VD->getType()->isIncompleteType() 959460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump && VD->getType()->isObjectType() 960460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump && !VD->getType()->isVariablyModifiedType() 961460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump && !VD->getType()->isDependentType()) { 962460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump uint64_t Size = Info.Ctx.getTypeSize(VD->getType()) / 8; 963460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump uint64_t Offset = Base.Val.getLValueOffset(); 964460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump if (Offset <= Size) 965460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump Size -= Base.Val.getLValueOffset(); 966460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump else 967460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump Size = 0; 968460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump return Success(Size, E); 969460d138c19be357414e4ab56ec880e5451f95cb4Mike Stump } 97064eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 97164eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 97264eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 973393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (E->getArg(0)->HasSideEffects(Info.Ctx)) { 9744fc8758077ced5cdc11f30a5ed07e9af71d5787aMike Stump if (E->getArg(1)->EvaluateAsInt(Info.Ctx).getZExtValue() < 2) 975cf184655319cf7a5b811067cff9d26a5741fd161Chris Lattner return Success(-1ULL, E); 97664eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Success(0, E); 97764eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 978c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 97964eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 98064eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 98164eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 982019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_classify_type: 983131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(EvaluateBuiltinClassifyType(E), E); 9841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9854bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson case Builtin::BI__builtin_constant_p: 986019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // __builtin_constant_p always has one operand: it returns true if that 987019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // operand can be folded, false otherwise. 988131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getArg(0)->isEvaluatable(Info.Ctx), E); 98921fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner 99021fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner case Builtin::BI__builtin_eh_return_data_regno: { 99121fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner int Operand = E->getArg(0)->EvaluateAsInt(Info.Ctx).getZExtValue(); 99221fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner Operand = Info.Ctx.Target.getEHDataRegisterNumber(Operand); 99321fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner return Success(Operand, E); 99421fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner } 995019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 9964c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 997f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 998b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 999a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == BinaryOperator::Comma) { 1000027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson if (!Visit(E->getRHS())) 1001027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return false; 10024fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson 100333ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // If we can't evaluate the LHS, it might have side effects; 100433ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // conservatively mark it. 100533ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 100633ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman Info.EvalResult.HasSideEffects = true; 1007c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner 1008027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return true; 1009a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1010a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1011a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->isLogicalOp()) { 1012a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // These need to be handled specially because the operands aren't 1013a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // necessarily integral 1014fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool lhsResult, rhsResult; 10151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1016fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getLHS(), lhsResult, Info)) { 101751fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // We were able to evaluate the LHS, see if we can get away with not 101851fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // evaluating the RHS: 0 && X -> 0, 1 || X -> 1 101933ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman if (lhsResult == (E->getOpcode() == BinaryOperator::LOr)) 10203f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(lhsResult, E); 1021a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1022fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 10234bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson if (E->getOpcode() == BinaryOperator::LOr) 1024131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult || rhsResult, E); 10254bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson else 1026131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult && rhsResult, E); 10274bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 10284bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } else { 1029fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 10304bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // We can't evaluate the LHS; however, sometimes the result 10314bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // is determined by the RHS: X && 0 -> 0, X || 1 -> 1. 10321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (rhsResult == (E->getOpcode() == BinaryOperator::LOr) || 1033fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson !rhsResult == (E->getOpcode() == BinaryOperator::LAnd)) { 1034131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // Since we weren't able to evaluate the left hand side, it 1035fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // must have had side effects. 1036fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson Info.EvalResult.HasSideEffects = true; 1037131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 1038131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(rhsResult, E); 10394bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 10404bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 1041a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1042a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1043a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1044c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner } 104554176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 1046286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType LHSTy = E->getLHS()->getType(); 1047286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType RHSTy = E->getRHS()->getType(); 10484087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 10494087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHSTy->isAnyComplexType()) { 10504087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar assert(RHSTy->isAnyComplexType() && "Invalid comparison"); 10514087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar APValue LHS, RHS; 10524087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 10534087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getLHS(), LHS, Info)) 10544087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 10554087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 10564087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 10574087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 10584087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 10594087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHS.isComplexFloat()) { 10601eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_r = 10614087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatReal().compare(RHS.getComplexFloatReal()); 10621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_i = 10634087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatImag().compare(RHS.getComplexFloatImag()); 10644087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 10654087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 1066131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((CR_r == APFloat::cmpEqual && 1067131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpEqual), E); 1068131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 1069131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 1070131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid complex comparison."); 10711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(((CR_r == APFloat::cmpGreaterThan || 1072131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_r == APFloat::cmpLessThan) && 10731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (CR_i == APFloat::cmpGreaterThan || 1074131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpLessThan)), E); 1075131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 10764087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } else { 10774087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 1078131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() == RHS.getComplexIntReal() && 1079131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() == RHS.getComplexIntImag()), E); 1080131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 1081131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 1082131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid compex comparison."); 1083131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() != RHS.getComplexIntReal() || 1084131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() != RHS.getComplexIntImag()), E); 1085131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 10864087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 10874087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 10881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1089286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (LHSTy->isRealFloatingType() && 1090286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson RHSTy->isRealFloatingType()) { 1091286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat RHS(0.0), LHS(0.0); 10921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1093286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1094286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 10951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1096286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getLHS(), LHS, Info)) 1097286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 10981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1099286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat::cmpResult CR = LHS.compare(RHS); 1100529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson 1101286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson switch (E->getOpcode()) { 1102286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson default: 1103286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson assert(0 && "Invalid binary operator!"); 1104286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LT: 1105131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan, E); 1106286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GT: 1107131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan, E); 1108286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LE: 1109131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan || CR == APFloat::cmpEqual, E); 1110286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GE: 11111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan || CR == APFloat::cmpEqual, 1112131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 1113286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::EQ: 1114131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpEqual, E); 1115286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::NE: 11161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan 1117131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar || CR == APFloat::cmpLessThan, E); 1118286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 1119286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 11201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1121ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (LHSTy->isPointerType() && RHSTy->isPointerType()) { 1122ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::Sub || E->isEqualityOp()) { 11233068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue LHSValue; 11243068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getLHS(), LHSValue, Info)) 11253068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1126a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 11273068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue RHSValue; 11283068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getRHS(), RHSValue, Info)) 11293068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1130a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 11315bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // Reject any bases from the normal codepath; we special-case comparisons 11325bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // to null. 11335bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (LHSValue.getLValueBase()) { 11345bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 11355bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11365bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (RHSValue.getLValueBase() || RHSValue.getLValueOffset()) 11375bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11385bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 11395bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(LHSValue, bres)) 11405bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11415bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return Success(bres ^ (E->getOpcode() == BinaryOperator::EQ), E); 11425bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } else if (RHSValue.getLValueBase()) { 11435bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 11445bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11455bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (LHSValue.getLValueBase() || LHSValue.getLValueOffset()) 11465bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11475bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 11485bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(RHSValue, bres)) 11495bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 11505bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return Success(bres ^ (E->getOpcode() == BinaryOperator::EQ), E); 11515bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } 1152a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1153ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::Sub) { 1154ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman const QualType Type = E->getLHS()->getType(); 11556217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const QualType ElementType = Type->getAs<PointerType>()->getPointeeType(); 11563068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 1157ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman uint64_t D = LHSValue.getLValueOffset() - RHSValue.getLValueOffset(); 1158ce1bca73aef9bbf6359ab8420278203dda81a054Eli Friedman if (!ElementType->isVoidType() && !ElementType->isFunctionType()) 1159ce1bca73aef9bbf6359ab8420278203dda81a054Eli Friedman D /= Info.Ctx.getTypeSize(ElementType) / 8; 1160a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1161ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman return Success(D, E); 1162ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1163ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman bool Result; 1164ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::EQ) { 1165ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() == RHSValue.getLValueOffset(); 1166267c0ab1b9a15768f3f15abbfc40ce344751c78bEli Friedman } else { 1167ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() != RHSValue.getLValueOffset(); 1168ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1169ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman return Success(Result, E); 11703068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 11713068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 1172286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!LHSTy->isIntegralType() || 1173286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson !RHSTy->isIntegralType()) { 1174a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // We can't continue from here for non-integral types, and they 1175a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // could potentially confuse the following operations. 1176a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1177a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1178a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1179a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // The LHS of a constant expr is always evaluated and needed. 118030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Visit(E->getLHS())) 1181a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; // error in subexpression. 1182d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman 118342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APValue RHSVal; 118442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!EvaluateIntegerOrLValue(E->getRHS(), RHSVal, Info)) 118530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 118642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 118742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like (unsigned long)&a + 4. 118842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->isAdditiveOp() && Result.isLValue() && RHSVal.isInt()) { 118942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman uint64_t offset = Result.getLValueOffset(); 119042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->getOpcode() == BinaryOperator::Add) 119142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman offset += RHSVal.getInt().getZExtValue(); 119242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman else 119342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman offset -= RHSVal.getInt().getZExtValue(); 119442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman Result = APValue(Result.getLValueBase(), offset); 119542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 119642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 119742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 119842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like 4 + (unsigned long)&a 119942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->getOpcode() == BinaryOperator::Add && 120042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman RHSVal.isLValue() && Result.isInt()) { 120142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman uint64_t offset = RHSVal.getLValueOffset(); 120242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman offset += Result.getInt().getZExtValue(); 120342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman Result = APValue(RHSVal.getLValueBase(), offset); 120442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 120542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 120642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 120742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // All the following cases expect both operands to be an integer 120842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!Result.isInt() || !RHSVal.isInt()) 1209b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1210a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 121142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APSInt& RHS = RHSVal.getInt(); 121242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 1213a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson switch (E->getOpcode()) { 121432fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner default: 12150e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 121630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Mul: return Success(Result.getInt() * RHS, E); 121730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Add: return Success(Result.getInt() + RHS, E); 121830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Sub: return Success(Result.getInt() - RHS, E); 121930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::And: return Success(Result.getInt() & RHS, E); 122030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Xor: return Success(Result.getInt() ^ RHS, E); 122130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Or: return Success(Result.getInt() | RHS, E); 1222a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Div: 122354176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 12240e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 122530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() / RHS, E); 1226a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Rem: 122754176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 12280e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 122930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() % RHS, E); 12303f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shl: { 123154176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner // FIXME: Warn about out of range shift amounts! 12321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 123330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 123430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() << SA, E); 12353f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 12363f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shr: { 12371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 123830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 123930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() >> SA, E); 12403f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 12411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 124230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LT: return Success(Result.getInt() < RHS, E); 124330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GT: return Success(Result.getInt() > RHS, E); 124430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LE: return Success(Result.getInt() <= RHS, E); 124530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GE: return Success(Result.getInt() >= RHS, E); 124630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::EQ: return Success(Result.getInt() == RHS, E); 124730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::NE: return Success(Result.getInt() != RHS, E); 1248b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 1249a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 1250a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 1251ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopesbool IntExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 1252a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes bool Cond; 1253a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes if (!HandleConversionToBool(E->getCond(), Cond, Info)) 1254ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes return false; 1255ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 1256a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 1257ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes} 1258ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 1259af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattnerunsigned IntExprEvaluator::GetAlignOfType(QualType T) { 12605d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 12615d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 12625d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 12635d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 12645d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = T->getAs<ReferenceType>()) 12655d484e8cf710207010720589d89602233de61d01Sebastian Redl T = Ref->getPointeeType(); 12665d484e8cf710207010720589d89602233de61d01Sebastian Redl 1267e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the alignment. 1268e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner unsigned CharSize = Info.Ctx.Target.getCharWidth(); 126918857644059c45da6776f1a288eec7b4cf3a844aDouglas Gregor 12702be586108bb401019647791feca19ea03fd477ceEli Friedman // __alignof is defined to return the preferred alignment. 127118857644059c45da6776f1a288eec7b4cf3a844aDouglas Gregor return Info.Ctx.getPreferredTypeAlign(T.getTypePtr()) / CharSize; 1272e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1273e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1274af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattnerunsigned IntExprEvaluator::GetAlignOfExpr(const Expr *E) { 1275af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner E = E->IgnoreParens(); 1276af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1277af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // alignof decl is always accepted, even if it doesn't make sense: we default 12781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // to 1 in those cases. 1279af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 12805d484e8cf710207010720589d89602233de61d01Sebastian Redl return Info.Ctx.getDeclAlignInBytes(DRE->getDecl(), /*RefAsPointee*/true); 1281a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1282af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) 12835d484e8cf710207010720589d89602233de61d01Sebastian Redl return Info.Ctx.getDeclAlignInBytes(ME->getMemberDecl(), 12845d484e8cf710207010720589d89602233de61d01Sebastian Redl /*RefAsPointee*/true); 1285af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1286e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(E->getType()); 1287e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1288e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1289e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 12900518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// VisitSizeAlignOfExpr - Evaluate a sizeof or alignof with a result as the 12910518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// expression's type. 12920518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redlbool IntExprEvaluator::VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E) { 12930518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType DstTy = E->getType(); 1294fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 1295e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Handle alignof separately. 1296e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!E->isSizeOf()) { 1297e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (E->isArgumentType()) 1298131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(GetAlignOfType(E->getArgumentType()), E); 1299e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner else 1300131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(GetAlignOfExpr(E->getArgumentExpr()), E); 1301e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner } 1302a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 13030518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType SrcTy = E->getTypeOfArgument(); 13045d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 13055d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 13065d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 13075d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 13085d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = SrcTy->getAs<ReferenceType>()) 13095d484e8cf710207010720589d89602233de61d01Sebastian Redl SrcTy = Ref->getPointeeType(); 13100518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 1311131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc 1312131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // extension. 1313131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar if (SrcTy->isVoidType() || SrcTy->isFunctionType()) 1314131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(1, E); 1315a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1316fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. 1317e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!SrcTy->isConstantSizeType()) 1318fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner return false; 1319f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 1320e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the size. 132124cbfb96f09318f59dc73eaaf4909a79788ec5acDaniel Dunbar unsigned BitWidth = Info.Ctx.getTypeSize(SrcTy); 1322ff89666e8d143b52f2bb5d2c3a108125d523abb7Daniel Dunbar return Success(BitWidth / Info.Ctx.Target.getCharWidth(), E); 1323fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner} 1324fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 1325b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 13264c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Special case unary operators that do not need their subexpression 13274c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // evaluated. offsetof/sizeof/alignof are all special. 132835183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (E->isOffsetOfOp()) { 132935183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman // The AST for offsetof is defined in such a way that we can just 133035183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman // directly Evaluate it as an l-value. 133135183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman APValue LV; 133235183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (!EvaluateLValue(E->getSubExpr(), LV, Info)) 133335183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman return false; 133435183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (LV.getLValueBase()) 133535183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman return false; 133635183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman return Success(LV.getLValueOffset(), E); 133735183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman } 1338a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1339a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == UnaryOperator::LNot) { 1340a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // LNot's operand isn't necessarily an integer, so we handle it specially. 1341a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman bool bres; 1342a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!HandleConversionToBool(E->getSubExpr(), bres, Info)) 1343a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1344131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(!bres, E); 1345a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1346a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 13474fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar // Only handle integral operations... 13484fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar if (!E->getSubExpr()->getType()->isIntegralType()) 13494fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar return false; 13504fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar 135187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner // Get the operand value into 'Result'. 135287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!Visit(E->getSubExpr())) 135375a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner return false; 1354a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 135575a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner switch (E->getOpcode()) { 13564c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner default: 135775a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 135875a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // See C99 6.6p3. 13590e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 136075a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Extension: 13614c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // FIXME: Should extension allow i-c-e extension expressions in its scope? 13624c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // If so, we could clear the diagnostic ID. 13633f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 136475a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Plus: 13651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // The result is always just the subexpr. 13663f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 136775a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Minus: 136830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 136930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(-Result.getInt(), E); 137075a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Not: 137130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 137230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(~Result.getInt(), E); 137306a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson } 1374a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 13751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1376732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// HandleCast - This is used to evaluate implicit or explicit casts where the 1377732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// result type is integer. 1378a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarbool IntExprEvaluator::VisitCastExpr(CastExpr *E) { 137982206e267ce6cc709797127616f64672d255b310Anders Carlsson Expr *SubExpr = E->getSubExpr(); 138082206e267ce6cc709797127616f64672d255b310Anders Carlsson QualType DestType = E->getType(); 1381b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar QualType SrcType = SubExpr->getType(); 138282206e267ce6cc709797127616f64672d255b310Anders Carlsson 13834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (DestType->isBooleanType()) { 13844efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 13854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(SubExpr, BoolResult, Info)) 13864efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1387131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(BoolResult, E); 13884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 13894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1390a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson // Handle simple integer->integer casts. 1391b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (SrcType->isIntegralType()) { 1392732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!Visit(SubExpr)) 1393b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1394a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1395be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!Result.isInt()) { 1396be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // Only allow casts of lvalues if they are lossless. 1397be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return Info.Ctx.getTypeSize(DestType) == Info.Ctx.getTypeSize(SrcType); 1398be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 139930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 1400dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, 140130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt(), Info.Ctx), E); 1402732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner } 14031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1404732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner // FIXME: Clean this up! 1405b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (SrcType->isPointerType()) { 1406a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson APValue LV; 140787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(SubExpr, LV, Info)) 1408b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 14094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1410dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (LV.getLValueBase()) { 1411dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar // Only allow based lvalue casts if they are lossless. 1412dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(SrcType)) 1413dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return false; 1414dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar 1415dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar Result = LV; 1416dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return true; 1417dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar } 14184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1419dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar APSInt AsInt = Info.Ctx.MakeIntValue(LV.getLValueOffset(), SrcType); 1420dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, AsInt, Info.Ctx), E); 14212bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 14224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1423be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (SrcType->isArrayType() || SrcType->isFunctionType()) { 1424be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // This handles double-conversion cases, where there's both 1425be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // an l-value promotion and an implicit conversion to int. 1426be26570e3faa009bdcefedfaf04473e518940520Eli Friedman APValue LV; 1427be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!EvaluateLValue(SubExpr, LV, Info)) 1428be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1429be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1430be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(Info.Ctx.VoidPtrTy)) 1431be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1432be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1433be26570e3faa009bdcefedfaf04473e518940520Eli Friedman Result = LV; 1434be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return true; 1435be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 1436be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 14371725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (SrcType->isAnyComplexType()) { 14381725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APValue C; 14391725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (!EvaluateComplex(SubExpr, C, Info)) 14401725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return false; 14411725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (C.isComplexFloat()) 14421725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleFloatToIntCast(DestType, SrcType, 14431725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexFloatReal(), Info.Ctx), 14441725f683432715e5afe34d476024bd6f16eac3fcEli Friedman E); 14451725f683432715e5afe34d476024bd6f16eac3fcEli Friedman else 14461725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleIntToIntCast(DestType, SrcType, 14471725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexIntReal(), Info.Ctx), E); 14481725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 14492217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // FIXME: Handle vectors 14502217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1451b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (!SrcType->isRealFloatingType()) 14520e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1453732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 1454d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat F(0.0); 1455d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(SubExpr, F, Info)) 14560e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 14571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1458b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar return Success(HandleFloatToIntCast(DestType, SrcType, F, Info.Ctx), E); 1459a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 14602bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 1461722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedmanbool IntExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 1462722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 1463722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman APValue LV; 1464722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1465722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1466722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntReal(), E); 1467722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1468722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1469722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Visit(E->getSubExpr()); 1470722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman} 1471722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1472664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedmanbool IntExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 1473722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isComplexIntegerType()) { 1474722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman APValue LV; 1475722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1476722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1477722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntImag(), E); 1478722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1479722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1480664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 1481664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman Info.EvalResult.HasSideEffects = true; 1482664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 1483664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman} 1484664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 1485f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1486d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman// Float Evaluation 1487d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1488d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1489d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmannamespace { 1490d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanclass VISIBILITY_HIDDEN FloatExprEvaluator 1491d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : public StmtVisitor<FloatExprEvaluator, bool> { 1492d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman EvalInfo &Info; 1493d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat &Result; 1494d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanpublic: 1495d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman FloatExprEvaluator(EvalInfo &info, APFloat &result) 1496d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : Info(info), Result(result) {} 1497d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1498d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitStmt(Stmt *S) { 1499d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1500d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1501d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1502d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 1503019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner bool VisitCallExpr(const CallExpr *E); 1504d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 15055db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar bool VisitUnaryOperator(const UnaryOperator *E); 1506d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 1507d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitFloatingLiteral(const FloatingLiteral *E); 15084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCastExpr(CastExpr *E); 15094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E); 15102217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1511ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) 1512ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 1513ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitUnaryExtension(const UnaryOperator *E) 1514ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 1515ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 1516ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: __real__/__imag__, array subscript of vector, 1517ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // member of vector, ImplicitValueInitExpr, 15187f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // conditional ?: 1519d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman}; 1520d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} // end anonymous namespace 1521d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1522d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) { 1523d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return FloatExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 1524d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1525d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1526019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattnerbool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) { 15273c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 152834a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner default: return false; 1529019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_val: 1530019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_valf: 1531019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_vall: 1532019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inf: 1533019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inff: 15347cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar case Builtin::BI__builtin_infl: { 15357cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 15367cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 153734a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner Result = llvm::APFloat::getInf(Sem); 153834a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner return true; 15397cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar } 15401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15419e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nan: 15429e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanf: 15439e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanl: 15444572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump // If this is __builtin_nan() turn this into a nan, otherwise we 15459e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // can't constant fold it. 15461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const StringLiteral *S = 15479e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner dyn_cast<StringLiteral>(E->getArg(0)->IgnoreParenCasts())) { 15484572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump if (!S->isWide()) { 15497cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 15507cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 15517462b39a9bccaf4392687831036713f09f9c0681Mike Stump llvm::SmallString<16> s; 15527462b39a9bccaf4392687831036713f09f9c0681Mike Stump s.append(S->getStrData(), S->getStrData() + S->getByteLength()); 15537462b39a9bccaf4392687831036713f09f9c0681Mike Stump s += '\0'; 15544572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump long l; 15554572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump char *endp; 15567462b39a9bccaf4392687831036713f09f9c0681Mike Stump l = strtol(&s[0], &endp, 0); 15577462b39a9bccaf4392687831036713f09f9c0681Mike Stump if (endp != s.end()-1) 15584572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump return false; 15594572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump unsigned type = (unsigned int)l;; 15604572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump Result = llvm::APFloat::getNaN(Sem, false, type); 15619e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner return true; 15629e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner } 15639e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner } 15649e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner return false; 15655db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 15665db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabs: 15675db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsf: 15685db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsl: 15695db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info)) 15705db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 15711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15725db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (Result.isNegative()) 15735db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 15745db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 15755db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 15761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysign: 15771eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysignf: 15785db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignl: { 15795db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.); 15805db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info) || 15815db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar !EvaluateFloat(E->getArg(1), RHS, Info)) 15825db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 15835db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.copySign(RHS); 15845db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 15855db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 1586019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 1587019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner} 1588019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 15895db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbarbool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 1590a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes if (E->getOpcode() == UnaryOperator::Deref) 1591a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes return false; 1592a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes 15935db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getSubExpr(), Result, Info)) 15945db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 15955db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 15965db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar switch (E->getOpcode()) { 15975db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar default: return false; 15981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case UnaryOperator::Plus: 15995db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 16005db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case UnaryOperator::Minus: 16015db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 16025db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 16035db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 16045db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar} 1605019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 1606d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 16077f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (E->getOpcode() == BinaryOperator::Comma) { 16087f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!EvaluateFloat(E->getRHS(), Result, Info)) 16097f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return false; 16107f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 16117f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // If we can't evaluate the LHS, it might have side effects; 16127f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // conservatively mark it. 16137f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 16147f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman Info.EvalResult.HasSideEffects = true; 16157f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 16167f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return true; 16177f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman } 16187f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 1619d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // FIXME: Diagnostics? I really don't understand how the warnings 1620d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // and errors are supposed to work. 16215db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.0); 1622d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getLHS(), Result, Info)) 1623d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1624d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1625d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1626d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1627d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman switch (E->getOpcode()) { 1628d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman default: return false; 1629d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Mul: 1630d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.multiply(RHS, APFloat::rmNearestTiesToEven); 1631d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1632d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Add: 1633d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.add(RHS, APFloat::rmNearestTiesToEven); 1634d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1635d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Sub: 1636d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.subtract(RHS, APFloat::rmNearestTiesToEven); 1637d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1638d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Div: 1639d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.divide(RHS, APFloat::rmNearestTiesToEven); 1640d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1641d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1642d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1643d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1644d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) { 1645d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result = E->getValue(); 1646d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1647d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1648d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 16494efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCastExpr(CastExpr *E) { 16504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* SubExpr = E->getSubExpr(); 16511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16524efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isIntegralType()) { 16534efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 16543f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!EvaluateInteger(SubExpr, IntResult, Info)) 16554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 16561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result = HandleIntToFloatCast(E->getType(), SubExpr->getType(), 1657a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar IntResult, Info.Ctx); 16584efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 16594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 16604efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isRealFloatingType()) { 16614efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!Visit(SubExpr)) 16624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1663a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(E->getType(), SubExpr->getType(), 1664a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result, Info.Ctx); 16654efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 16664efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 16672217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // FIXME: Handle complex types 16684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 16694efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 16704efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 16714efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 16724efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) { 16734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(E->getType())); 16744efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 16754efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 16764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1677d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1678a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar// Complex Evaluation (for float and integer) 16799ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 16809ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 16819ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonnamespace { 1682a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbarclass VISIBILITY_HIDDEN ComplexExprEvaluator 1683a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar : public StmtVisitor<ComplexExprEvaluator, APValue> { 16849ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson EvalInfo &Info; 16851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16869ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonpublic: 1687a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar ComplexExprEvaluator(EvalInfo &info) : Info(info) {} 16881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16899ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 16909ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson // Visitor Methods 16919ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 16929ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 16939ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitStmt(Stmt *S) { 16949ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson return APValue(); 16959ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 16961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 16979ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 16989ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 16999ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitImaginaryLiteral(ImaginaryLiteral *E) { 1700a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Expr* SubExpr = E->getSubExpr(); 1701a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1702a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (SubExpr->getType()->isRealFloatingType()) { 1703a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat Result(0.0); 1704a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1705a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateFloat(SubExpr, Result, Info)) 1706a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 17071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(APFloat(Result.getSemantics(), APFloat::fcZero, false), 1709a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result); 1710a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 17111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(SubExpr->getType()->isIntegerType() && 1712a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar "Unexpected imaginary literal."); 1713a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1714a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Result; 1715a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateInteger(SubExpr, Result, Info)) 1716a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 17171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1718a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Zero(Result.getBitWidth(), !Result.isSigned()); 1719a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Zero = 0; 1720a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(Zero, Result); 1721a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 17229ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 17239ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 1724ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue VisitCastExpr(CastExpr *E) { 1725ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson Expr* SubExpr = E->getSubExpr(); 1726183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall QualType EltType = E->getType()->getAs<ComplexType>()->getElementType(); 1727a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SubType = SubExpr->getType(); 1728ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1729a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (SubType->isRealFloatingType()) { 1730ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APFloat Result(0.0); 17311725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 1732ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson if (!EvaluateFloat(SubExpr, Result, Info)) 1733ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 17341725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 17351725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (EltType->isRealFloatingType()) { 17361725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Result = HandleFloatToFloatCast(EltType, SubType, Result, Info.Ctx); 17371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(Result, 17381725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APFloat(Result.getSemantics(), APFloat::fcZero, false)); 17391725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } else { 17401725f683432715e5afe34d476024bd6f16eac3fcEli Friedman llvm::APSInt IResult; 17411725f683432715e5afe34d476024bd6f16eac3fcEli Friedman IResult = HandleFloatToIntCast(EltType, SubType, Result, Info.Ctx); 17421725f683432715e5afe34d476024bd6f16eac3fcEli Friedman llvm::APSInt Zero(IResult.getBitWidth(), !IResult.isSigned()); 17431725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Zero = 0; 17441725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return APValue(IResult, Zero); 17451725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 1746a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else if (SubType->isIntegerType()) { 1747a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APSInt Result; 17481725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 1749a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateInteger(SubExpr, Result, Info)) 1750a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 1751a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 17521725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (EltType->isRealFloatingType()) { 17531725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APFloat FResult = 17541725f683432715e5afe34d476024bd6f16eac3fcEli Friedman HandleIntToFloatCast(EltType, SubType, Result, Info.Ctx); 17551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(FResult, 17561725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APFloat(FResult.getSemantics(), APFloat::fcZero, false)); 17571725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } else { 17581725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Result = HandleIntToIntCast(EltType, SubType, Result, Info.Ctx); 17591725f683432715e5afe34d476024bd6f16eac3fcEli Friedman llvm::APSInt Zero(Result.getBitWidth(), !Result.isSigned()); 17601725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Zero = 0; 17611725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return APValue(Result, Zero); 17621725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 1763183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall } else if (const ComplexType *CT = SubType->getAs<ComplexType>()) { 1764a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APValue Src; 17651725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 1766a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (!EvaluateComplex(SubExpr, Src, Info)) 1767a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(); 1768a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1769a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SrcType = CT->getElementType(); 1770a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1771a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (Src.isComplexFloat()) { 1772a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 17731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(HandleFloatToFloatCast(EltType, SrcType, 1774a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatReal(), 1775a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 17761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleFloatToFloatCast(EltType, SrcType, 1777a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatImag(), 1778a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1779a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1780a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleFloatToIntCast(EltType, SrcType, 1781a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatReal(), 1782a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 17831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleFloatToIntCast(EltType, SrcType, 1784a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatImag(), 17851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Info.Ctx)); 1786a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1787a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1788a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar assert(Src.isComplexInt() && "Invalid evaluate result."); 1789a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 17901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(HandleIntToFloatCast(EltType, SrcType, 1791a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntReal(), 1792a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 17931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleIntToFloatCast(EltType, SrcType, 1794a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntImag(), 1795a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1796a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1797a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleIntToIntCast(EltType, SrcType, 1798a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntReal(), 1799a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 18001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleIntToIntCast(EltType, SrcType, 1801a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntImag(), 18021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Info.Ctx)); 1803a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1804a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1805ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1806ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1807ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson // FIXME: Handle more casts. 1808ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1809ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 18101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1811ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue VisitBinaryOperator(const BinaryOperator *E); 1812ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 1813ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 1814ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 1815ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 1816ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME Missing: unary +/-/~, binary div, ImplicitValueInitExpr, 18172217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // conditional ?:, comma 18189ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson}; 18199ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} // end anonymous namespace 18209ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 18211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic bool EvaluateComplex(const Expr *E, APValue &Result, EvalInfo &Info) { 1822a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result = ComplexExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 1823a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar assert((!Result.isComplexFloat() || 18241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (&Result.getComplexFloatReal().getSemantics() == 18251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump &Result.getComplexFloatImag().getSemantics())) && 1826a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar "Invalid complex evaluation."); 1827a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return Result.isComplexFloat() || Result.isComplexInt(); 18289ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} 18299ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 18301eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue ComplexExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 1831ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue Result, RHS; 18321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1833a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getLHS(), Result, Info)) 1834ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 18351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1836a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 1837ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1838a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 18393f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar assert(Result.isComplexFloat() == RHS.isComplexFloat() && 18403f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar "Invalid operands to binary operator."); 1841ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson switch (E->getOpcode()) { 1842ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson default: return APValue(); 1843ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Add: 1844a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 1845a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().add(RHS.getComplexFloatReal(), 1846a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1847a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().add(RHS.getComplexFloatImag(), 1848a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1849a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1850a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() += RHS.getComplexIntReal(); 1851a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() += RHS.getComplexIntImag(); 1852a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 18533f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 1854ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Sub: 1855a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 1856a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().subtract(RHS.getComplexFloatReal(), 1857a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1858a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().subtract(RHS.getComplexFloatImag(), 1859a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1860a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1861a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() -= RHS.getComplexIntReal(); 1862a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() -= RHS.getComplexIntImag(); 1863a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 18643f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 18653f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar case BinaryOperator::Mul: 18663f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar if (Result.isComplexFloat()) { 18673f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APValue LHS = Result; 18683f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_r = LHS.getComplexFloatReal(); 18693f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_i = LHS.getComplexFloatImag(); 18703f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_r = RHS.getComplexFloatReal(); 18713f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_i = RHS.getComplexFloatImag(); 18721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18733f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat Tmp = LHS_r; 18743f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 18753f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal() = Tmp; 18763f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 18773f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 18783f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal().subtract(Tmp, APFloat::rmNearestTiesToEven); 18793f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 18803f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_r; 18813f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 18823f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag() = Tmp; 18833f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 18843f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 18853f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag().add(Tmp, APFloat::rmNearestTiesToEven); 18863f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } else { 18873f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APValue LHS = Result; 18881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntReal() = 18893f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntReal() - 18903f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntImag()); 18911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntImag() = 18923f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntImag() + 18933f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntReal()); 18943f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } 18953f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 1896ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1897ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1898ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return Result; 1899ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson} 1900ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 19019ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 19026ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner// Top level Expr::Evaluate method. 1903f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1904f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 19056ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// Evaluate - Return true if this is a constant which we can fold using 1906019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// any crazy technique (that has nothing to do with language standards) that 1907019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// we want to. If this function returns true, it returns the folded constant 1908019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// in Result. 19095b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlssonbool Expr::Evaluate(EvalResult &Result, ASTContext &Ctx) const { 19105b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson EvalInfo Info(Ctx, Result); 191154da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson 191259b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (getType()->isVectorType()) { 191359b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!EvaluateVector(this, Result.Val, Info)) 191459b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 191559b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else if (getType()->isIntegerType()) { 191630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!IntExprEvaluator(Info, Result.Val).Visit(const_cast<Expr*>(this))) 19176dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 19188958891f5fa1e593c4519a36b3df427ee019d70bDaniel Dunbar } else if (getType()->hasPointerRepresentation()) { 19195b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson if (!EvaluatePointer(this, Result.Val, Info)) 19206dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1921d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } else if (getType()->isRealFloatingType()) { 1922d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman llvm::APFloat f(0.0); 19236dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson if (!EvaluateFloat(this, f, Info)) 19246dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 19251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19265b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson Result.Val = APValue(f); 1927a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else if (getType()->isAnyComplexType()) { 1928a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(this, Result.Val, Info)) 1929660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1930660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else 1931660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1932660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 1933660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return true; 1934660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump} 1935660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 1936660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stumpbool Expr::EvaluateAsAny(EvalResult &Result, ASTContext &Ctx) const { 1937660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump EvalInfo Info(Ctx, Result, true); 1938660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 1939660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (getType()->isVectorType()) { 1940660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (!EvaluateVector(this, Result.Val, Info)) 1941660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1942660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else if (getType()->isIntegerType()) { 1943660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (!IntExprEvaluator(Info, Result.Val).Visit(const_cast<Expr*>(this))) 1944660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1945660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else if (getType()->hasPointerRepresentation()) { 1946660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (!EvaluatePointer(this, Result.Val, Info)) 1947660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1948660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else if (getType()->isRealFloatingType()) { 1949660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump llvm::APFloat f(0.0); 1950660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (!EvaluateFloat(this, f, Info)) 1951660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 1952660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 1953660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump Result.Val = APValue(f); 1954660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else if (getType()->isAnyComplexType()) { 1955660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump if (!EvaluateComplex(this, Result.Val, Info)) 19566dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1957a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else 19589d4c157baaada8945671dc98363a40ed00cbd824Anders Carlsson return false; 19596dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson 19605b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson return true; 19615b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson} 19625b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson 19631b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlssonbool Expr::EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const { 19641b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson EvalInfo Info(Ctx, Result); 19651b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 19661b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson return EvaluateLValue(this, Result.Val, Info) && !Result.HasSideEffects; 19671b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson} 19681b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 1969b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedmanbool Expr::EvaluateAsAnyLValue(EvalResult &Result, ASTContext &Ctx) const { 1970b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman EvalInfo Info(Ctx, Result, true); 1971b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 1972b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman return EvaluateLValue(this, Result.Val, Info) && !Result.HasSideEffects; 1973b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman} 1974b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 19756ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// isEvaluatable - Call Evaluate to see if this expression can be constant 197645b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner/// folded, but discard the result. 197745b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattnerbool Expr::isEvaluatable(ASTContext &Ctx) const { 19784fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson EvalResult Result; 19794fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects; 198045b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner} 198151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 1982393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanianbool Expr::HasSideEffects(ASTContext &Ctx) const { 1983393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian Expr::EvalResult Result; 1984393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian EvalInfo Info(Ctx, Result); 1985393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return HasSideEffect(Info).Visit(const_cast<Expr*>(this)); 1986393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian} 1987393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian 198851fe996231b1d7199f76e4005ff4c943d5deeecdAnders CarlssonAPSInt Expr::EvaluateAsInt(ASTContext &Ctx) const { 19891c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 19901c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson bool Result = Evaluate(EvalResult, Ctx); 1991f185319f25efd6094870f287030270fad26085baDaniel Dunbar Result = Result; 199251fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson assert(Result && "Could not evaluate expression"); 19931c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(EvalResult.Val.isInt() && "Expression did not evaluate to integer"); 199451fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 19951c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson return EvalResult.Val.getInt(); 199651fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson} 1997