ExprConstant.cpp revision 1eb4433ac451dc16f4133a88af2d002ac26c58ef
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 491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump EvalInfo(ASTContext &ctx, Expr::EvalResult& evalresult) : Ctx(ctx), 5033ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman EvalResult(evalresult) {} 5187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner}; 5287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 5387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 544efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanstatic bool EvaluateLValue(const Expr *E, APValue &Result, EvalInfo &Info); 5587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluatePointer(const Expr *E, APValue &Result, EvalInfo &Info); 5687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluateInteger(const Expr *E, APSInt &Result, EvalInfo &Info); 5769ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateIntegerOrLValue(const Expr *E, APValue &Result, EvalInfo &Info); 58d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr *E, APFloat &Result, EvalInfo &Info); 59a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbarstatic bool EvaluateComplex(const Expr *E, APValue &Result, EvalInfo &Info); 60f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 61f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// Misc utilities 634efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 655bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedmanstatic bool EvalPointerValueAsBool(APValue& Value, bool& Result) { 665bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // FIXME: Is this accurate for all kinds of bases? If not, what would 675bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // the check look like? 685bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman Result = Value.getLValueBase() || Value.getLValueOffset(); 695bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return true; 705bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman} 715bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman 724efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanstatic bool HandleConversionToBool(Expr* E, bool& Result, EvalInfo &Info) { 734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->getType()->isIntegralType()) { 744efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 754efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateInteger(E, IntResult, Info)) 764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = IntResult != 0; 784efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 794efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else if (E->getType()->isRealFloatingType()) { 804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APFloat FloatResult(0.0); 814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateFloat(E, FloatResult, Info)) 824efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = !FloatResult.isZero(); 844efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 85a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->hasPointerRepresentation()) { 864efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue PointerResult; 874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluatePointer(E, PointerResult, Info)) 884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 895bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return EvalPointerValueAsBool(PointerResult, Result); 90a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->isAnyComplexType()) { 91a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman APValue ComplexResult; 92a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (!EvaluateComplex(E, ComplexResult, Info)) 93a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return false; 94a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (ComplexResult.isComplexFloat()) { 95a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = !ComplexResult.getComplexFloatReal().isZero() || 96a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman !ComplexResult.getComplexFloatImag().isZero(); 97a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else { 98a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = ComplexResult.getComplexIntReal().getBoolValue() || 99a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman ComplexResult.getComplexIntImag().getBoolValue(); 100a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } 101a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return true; 1024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 1034efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1044efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1054efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 1064efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleFloatToIntCast(QualType DestType, QualType SrcType, 108a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat &Value, ASTContext &Ctx) { 109a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 110a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Determine whether we are converting to unsigned or signed. 111a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool DestSigned = DestType->isSignedIntegerType(); 1121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 113a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // FIXME: Warning for overflow. 114a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar uint64_t Space[4]; 115a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 116a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar (void)Value.convertToInteger(Space, DestWidth, DestSigned, 117a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar llvm::APFloat::rmTowardZero, &ignored); 118a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APSInt(llvm::APInt(DestWidth, 4, Space), !DestSigned); 119a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 120a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1211eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleFloatToFloatCast(QualType DestType, QualType SrcType, 122a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat &Value, ASTContext &Ctx) { 123a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 124a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result = Value; 1251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.convert(Ctx.getFloatTypeSemantics(DestType), 126a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven, &ignored); 127a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 128a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 129a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleIntToIntCast(QualType DestType, QualType SrcType, 131a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt &Value, ASTContext &Ctx) { 132a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 133a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt Result = Value; 134a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Figure out if this is a truncate, extend or noop cast. 135a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // If the input is signed, do a sign extend, noop, or truncate. 136a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.extOrTrunc(DestWidth); 137a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.setIsUnsigned(DestType->isUnsignedIntegerType()); 138a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 139a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 140a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleIntToFloatCast(QualType DestType, QualType SrcType, 142a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt &Value, ASTContext &Ctx) { 143a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 144a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result(Ctx.getFloatTypeSemantics(DestType), 1); 145a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.convertFromAPInt(Value, Value.isSigned(), 146a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven); 147a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 148a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 149a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 1514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// LValue Evaluation 1524efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 1534efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmannamespace { 1544efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanclass VISIBILITY_HIDDEN LValueExprEvaluator 1554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman : public StmtVisitor<LValueExprEvaluator, APValue> { 1564efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman EvalInfo &Info; 1574efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanpublic: 1581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman LValueExprEvaluator(EvalInfo &info) : Info(info) {} 1604efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1614efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitStmt(Stmt *S) { 1624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 1634efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 1644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1654efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 16635873c49adad211ff466e34342a52665742794f5Anders Carlsson APValue VisitDeclRefExpr(DeclRefExpr *E); 1673aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff APValue VisitBlockExpr(BlockExpr *E); 1684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitPredefinedExpr(PredefinedExpr *E) { return APValue(E, 0); } 1694efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitCompoundLiteralExpr(CompoundLiteralExpr *E); 1704efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitMemberExpr(MemberExpr *E); 1714efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitStringLiteral(StringLiteral *E) { return APValue(E, 0); } 172eaf2bb89eb2aad3b80673de30febe52df43c10ecChris Lattner APValue VisitObjCEncodeExpr(ObjCEncodeExpr *E) { return APValue(E, 0); } 1733068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue VisitArraySubscriptExpr(ArraySubscriptExpr *E); 174e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman APValue VisitUnaryDeref(UnaryOperator *E); 175ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 176ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 177ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 178ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 179ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: __real__, __imag__ 1804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman}; 1814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} // end anonymous namespace 1824efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanstatic bool EvaluateLValue(const Expr* E, APValue& Result, EvalInfo &Info) { 1844efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = LValueExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 1854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result.isLValue(); 1864efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 1874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1881eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue LValueExprEvaluator::VisitDeclRefExpr(DeclRefExpr *E) { 18950c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (isa<FunctionDecl>(E->getDecl())) { 19050c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman return APValue(E, 0); 19150c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } else if (VarDecl* VD = dyn_cast<VarDecl>(E->getDecl())) { 192d933a0198f3ccce9c73bf2951625315b911d37bfEli Friedman if (!VD->hasGlobalStorage()) 193d933a0198f3ccce9c73bf2951625315b911d37bfEli Friedman return APValue(); 19450c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (!VD->getType()->isReferenceType()) 19550c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman return APValue(E, 0); 196d933a0198f3ccce9c73bf2951625315b911d37bfEli Friedman // FIXME: Check whether VD might be overridden! 19750c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (VD->getInit()) 19850c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman return Visit(VD->getInit()); 19950c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } 20050c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman 20150c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman return APValue(); 20235873c49adad211ff466e34342a52665742794f5Anders Carlsson} 20335873c49adad211ff466e34342a52665742794f5Anders Carlsson 2041eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue LValueExprEvaluator::VisitBlockExpr(BlockExpr *E) { 2053aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff if (E->hasBlockDeclRefExprs()) 2063aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff return APValue(); 2071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2083aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff return APValue(E, 0); 2093aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff} 2103aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff 2114efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue LValueExprEvaluator::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 2124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->isFileScope()) 2134efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(E, 0); 2144efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 2154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 2164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2174efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue LValueExprEvaluator::VisitMemberExpr(MemberExpr *E) { 2184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue result; 2194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman QualType Ty; 2204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->isArrow()) { 2214efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluatePointer(E->getBase(), result, Info)) 2224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 2236217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek Ty = E->getBase()->getType()->getAs<PointerType>()->getPointeeType(); 2244efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else { 2254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result = Visit(E->getBase()); 2264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (result.isUninit()) 2274efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 2284efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Ty = E->getBase()->getType(); 2294efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2304efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2316217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *RD = Ty->getAs<RecordType>()->getDecl(); 2324efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 23386f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 23486f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor FieldDecl *FD = dyn_cast<FieldDecl>(E->getMemberDecl()); 23586f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (!FD) // FIXME: deal with other kinds of member expressions 23686f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return APValue(); 2372be586108bb401019647791feca19ea03fd477ceEli Friedman 2382be586108bb401019647791feca19ea03fd477ceEli Friedman if (FD->getType()->isReferenceType()) 2392be586108bb401019647791feca19ea03fd477ceEli Friedman return APValue(); 2402be586108bb401019647791feca19ea03fd477ceEli Friedman 2414efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // FIXME: This is linear time. 24244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor unsigned i = 0; 24317945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = RD->field_begin(), 24417945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = RD->field_end(); 24544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; (void)++Field, ++i) { 24644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (*Field == FD) 2474efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman break; 2484efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2494efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result.setLValue(result.getLValueBase(), 2514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result.getLValueOffset() + RL.getFieldOffset(i) / 8); 2524efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2534efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return result; 2544efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 2554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2561eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue LValueExprEvaluator::VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 2573068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue Result; 2581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2593068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getBase(), Result, Info)) 2603068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return APValue(); 2611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2623068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APSInt Index; 2633068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluateInteger(E->getIdx(), Index, Info)) 2643068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return APValue(); 2653068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 2663068d117951a8df54bae9db039b56201ab10962bAnders Carlsson uint64_t ElementSize = Info.Ctx.getTypeSize(E->getType()) / 8; 2673068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 2683068d117951a8df54bae9db039b56201ab10962bAnders Carlsson uint64_t Offset = Index.getSExtValue() * ElementSize; 2691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.setLValue(Result.getLValueBase(), 2703068d117951a8df54bae9db039b56201ab10962bAnders Carlsson Result.getLValueOffset() + Offset); 2713068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return Result; 2723068d117951a8df54bae9db039b56201ab10962bAnders Carlsson} 2734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2741eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue LValueExprEvaluator::VisitUnaryDeref(UnaryOperator *E) { 275e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman APValue Result; 276e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman if (!EvaluatePointer(E->getSubExpr(), Result, Info)) 277e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman return APValue(); 278e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman return Result; 279e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman} 280e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman 2814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 282f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Pointer Evaluation 283f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 284f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 285c754aa62643e66ab967ca32ae8b0b3fc419bba25Anders Carlssonnamespace { 2862bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonclass VISIBILITY_HIDDEN PointerExprEvaluator 2872bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson : public StmtVisitor<PointerExprEvaluator, APValue> { 28887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 2892bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonpublic: 2901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 29187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner PointerExprEvaluator(EvalInfo &info) : Info(info) {} 292f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 2932bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson APValue VisitStmt(Stmt *S) { 2942bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson return APValue(); 2952bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 2962bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 2972bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 2982bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 299650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue VisitBinaryOperator(const BinaryOperator *E); 300650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue VisitCastExpr(const CastExpr* E); 3012217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 3022217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman { return Visit(E->getSubExpr()); } 3032217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman APValue VisitUnaryAddrOf(const UnaryOperator *E); 3044efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitObjCStringLiteral(ObjCStringLiteral *E) 3054efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman { return APValue(E, 0); } 306f01158941ba4560c63150032073bb231ce38999eEli Friedman APValue VisitAddrLabelExpr(AddrLabelExpr *E) 307f01158941ba4560c63150032073bb231ce38999eEli Friedman { return APValue(E, 0); } 3083941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman APValue VisitCallExpr(CallExpr *E); 309b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump APValue VisitBlockExpr(BlockExpr *E) { 310b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump if (!E->hasBlockDeclRefExprs()) 311b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump return APValue(E, 0); 312b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump return APValue(); 313b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump } 31491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) 31591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return APValue((Expr*)0, 0); } 3164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitConditionalOperator(ConditionalOperator *E); 317ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(ChooseExpr *E) 3186e8ed16ffef02b82995a90bdcf10ffff7d63839aSebastian Redl { return Visit(E->getChosenSubExpr(Info.Ctx)); } 3196e8ed16ffef02b82995a90bdcf10ffff7d63839aSebastian Redl APValue VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) 3206e8ed16ffef02b82995a90bdcf10ffff7d63839aSebastian Redl { return APValue((Expr*)0, 0); } 321ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: @protocol, @selector 3222bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson}; 323f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 3242bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 32587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluatePointer(const Expr* E, APValue& Result, EvalInfo &Info) { 3268958891f5fa1e593c4519a36b3df427ee019d70bDaniel Dunbar if (!E->getType()->hasPointerRepresentation()) 327f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return false; 32887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner Result = PointerExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 329f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return Result.isLValue(); 330f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 331650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 332f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris LattnerAPValue PointerExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 333650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() != BinaryOperator::Add && 334650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson E->getOpcode() != BinaryOperator::Sub) 335650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 3361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 337650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *PExp = E->getLHS(); 338650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *IExp = E->getRHS(); 339650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (IExp->getType()->isPointerType()) 340f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner std::swap(PExp, IExp); 3411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 342650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue ResultLValue; 34387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(PExp, ResultLValue, Info)) 344650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 3451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 346650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson llvm::APSInt AdditionalOffset(32); 34787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluateInteger(IExp, AdditionalOffset, Info)) 348650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 349650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 3506217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek QualType PointeeType = PExp->getType()->getAs<PointerType>()->getPointeeType(); 3514d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson uint64_t SizeOfPointee; 3521eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 3534d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson // Explicitly handle GNU void* and function pointer arithmetic extensions. 3544d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson if (PointeeType->isVoidType() || PointeeType->isFunctionType()) 3554d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson SizeOfPointee = 1; 3564d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson else 3574d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson SizeOfPointee = Info.Ctx.getTypeSize(PointeeType) / 8; 3584efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 359650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson uint64_t Offset = ResultLValue.getLValueOffset(); 3604efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 361650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() == BinaryOperator::Add) 3624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Offset += AdditionalOffset.getLimitedValue() * SizeOfPointee; 363650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson else 3644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Offset -= AdditionalOffset.getLimitedValue() * SizeOfPointee; 3654efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 366650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(ResultLValue.getLValueBase(), Offset); 367650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 3684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3692217c87bdc5ab357046a5453bdb06f469c41024eEli FriedmanAPValue PointerExprEvaluator::VisitUnaryAddrOf(const UnaryOperator *E) { 3702217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman APValue result; 3712217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman if (EvaluateLValue(E->getSubExpr(), result, Info)) 3722217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman return result; 3734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 3744efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 3751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 376650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 377b542afe02d317411d53b3541946f9f2a8f509a11Chris LattnerAPValue PointerExprEvaluator::VisitCastExpr(const CastExpr* E) { 378650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr* SubExpr = E->getSubExpr(); 379650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 380650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson // Check for pointer->pointer cast 38114108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff if (SubExpr->getType()->isPointerType() || 38214108da7f7fc059772711e4ffee1322a27b152a7Steve Naroff SubExpr->getType()->isObjCObjectPointerType()) { 383650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue Result; 38487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (EvaluatePointer(SubExpr, Result, Info)) 385650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return Result; 386f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return APValue(); 387650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 3881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 389d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman if (SubExpr->getType()->isIntegralType()) { 39069ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar APValue Result; 39169ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (!EvaluateIntegerOrLValue(SubExpr, Result, Info)) 39269ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return APValue(); 39369ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 39469ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (Result.isInt()) { 39569ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar Result.getInt().extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 39669ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return APValue(0, Result.getInt().getZExtValue()); 397650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 3981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 39969ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar // Cast is of an lvalue, no need to change value. 40069ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return Result; 401650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 4024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4034efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isFunctionType() || 4043aaa482ea5b8d20b705f6ac8573b539be88d273aSteve Naroff SubExpr->getType()->isBlockPointerType() || 4054efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman SubExpr->getType()->isArrayType()) { 4064efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue Result; 4074efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluateLValue(SubExpr, Result, Info)) 4084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result; 4094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 4104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 4114efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 412650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 4131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 414650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 4153941b18b8e441c8c466efecd557de60b9a32d10bEli FriedmanAPValue PointerExprEvaluator::VisitCallExpr(CallExpr *E) { 4161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (E->isBuiltinCall(Info.Ctx) == 4173c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor Builtin::BI__builtin___CFStringMakeConstantString) 4183941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman return APValue(E, 0); 4193941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman return APValue(); 4203941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman} 4213941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman 4224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue PointerExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 4234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 4244efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 4254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 4264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4274efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 4284efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 4294efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue Result; 4304efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluatePointer(EvalExpr, Result, Info)) 4314efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result; 4324efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 4334efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 434f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 435f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 43659b5da6d853b4368b984700315adf7b37de05764Nate Begeman// Vector Evaluation 43759b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 43859b5da6d853b4368b984700315adf7b37de05764Nate Begeman 43959b5da6d853b4368b984700315adf7b37de05764Nate Begemannamespace { 44059b5da6d853b4368b984700315adf7b37de05764Nate Begeman class VISIBILITY_HIDDEN VectorExprEvaluator 44159b5da6d853b4368b984700315adf7b37de05764Nate Begeman : public StmtVisitor<VectorExprEvaluator, APValue> { 44259b5da6d853b4368b984700315adf7b37de05764Nate Begeman EvalInfo &Info; 44391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue GetZeroVector(QualType VecType); 44459b5da6d853b4368b984700315adf7b37de05764Nate Begeman public: 4451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 44659b5da6d853b4368b984700315adf7b37de05764Nate Begeman VectorExprEvaluator(EvalInfo &info) : Info(info) {} 4471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 44859b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitStmt(Stmt *S) { 44959b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 45059b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 4511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 45291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitParenExpr(ParenExpr *E) 45391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 45491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 45591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 45691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryPlus(const UnaryOperator *E) 45791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 45891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryReal(const UnaryOperator *E) 45991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 46091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) 46191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return GetZeroVector(E->getType()); } 46259b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCastExpr(const CastExpr* E); 46359b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 46459b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitInitListExpr(const InitListExpr *E); 46591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitConditionalOperator(const ConditionalOperator *E); 466ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 467ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 46891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryImag(const UnaryOperator *E); 46991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // FIXME: Missing: unary -, unary ~, binary add/sub/mul/div, 4702217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // binary comparisons, binary and/or/xor, 47191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // shufflevector, ExtVectorElementExpr 47291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // (Note that these require implementing conversions 47391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // between vector types.) 47459b5da6d853b4368b984700315adf7b37de05764Nate Begeman }; 47559b5da6d853b4368b984700315adf7b37de05764Nate Begeman} // end anonymous namespace 47659b5da6d853b4368b984700315adf7b37de05764Nate Begeman 47759b5da6d853b4368b984700315adf7b37de05764Nate Begemanstatic bool EvaluateVector(const Expr* E, APValue& Result, EvalInfo &Info) { 47859b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!E->getType()->isVectorType()) 47959b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 48059b5da6d853b4368b984700315adf7b37de05764Nate Begeman Result = VectorExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 48159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return !Result.isUninit(); 48259b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 48359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 48459b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue VectorExprEvaluator::VisitCastExpr(const CastExpr* E) { 485c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman const VectorType *VTy = E->getType()->getAsVectorType(); 486c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman QualType EltTy = VTy->getElementType(); 487c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned NElts = VTy->getNumElements(); 488c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned EltWidth = Info.Ctx.getTypeSize(EltTy); 4891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 49059b5da6d853b4368b984700315adf7b37de05764Nate Begeman const Expr* SE = E->getSubExpr(); 491e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman QualType SETy = SE->getType(); 492e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APValue Result = APValue(); 49359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 494e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman // Check for vector->vector bitcast and scalar->vector splat. 495e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman if (SETy->isVectorType()) { 49659b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(SE)); 497e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isIntegerType()) { 498e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APSInt IntResult; 499d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateInteger(SE, IntResult, Info)) 500d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 501d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(IntResult); 502e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isRealFloatingType()) { 503e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APFloat F(0.0); 504d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateFloat(SE, F, Info)) 505d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 506d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(F); 507d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar } else 508c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 50959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 510c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to ExtVector, convert the scalar to the element type 511c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // and splat it to all elements. 512c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (E->getType()->isExtVectorType()) { 513c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType() && Result.isInt()) 514c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToIntCast(EltTy, SETy, Result.getInt(), 515c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 516c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isIntegerType()) 517c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToIntCast(EltTy, SETy, Result.getFloat(), 518c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 519c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType() && Result.isInt()) 520c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToFloatCast(EltTy, SETy, Result.getInt(), 521c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 522c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 523c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToFloatCast(EltTy, SETy, Result.getFloat(), 524c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 525c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 526c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 527c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 528c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // Splat and create vector APValue. 529c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts(NElts, Result); 530c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 531e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } 532c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 533c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to regular gcc-style vector type, bitcast the scalar 534c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // to the vector. To construct the APValue vector initializer, bitcast the 535c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // initializing value to an APInt, and shift out the bits pertaining to each 536c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // element. 537c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman APSInt Init; 538c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init = Result.isInt() ? Result.getInt() : Result.getFloat().bitcastToAPInt(); 5391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 540c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts; 541c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman for (unsigned i = 0; i != NElts; ++i) { 542c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman APSInt Tmp = Init; 543c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Tmp.extOrTrunc(EltWidth); 5441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 545c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType()) 546c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(Tmp)); 547c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 548c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(APFloat(Tmp))); 549c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 550c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 551c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 552c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init >>= EltWidth; 553c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman } 554c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 55559b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 55659b5da6d853b4368b984700315adf7b37de05764Nate Begeman 5571eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 55859b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 55959b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(E->getInitializer())); 56059b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 56159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 5621eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 56359b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 56459b5da6d853b4368b984700315adf7b37de05764Nate Begeman const VectorType *VT = E->getType()->getAsVectorType(); 56559b5da6d853b4368b984700315adf7b37de05764Nate Begeman unsigned NumInits = E->getNumInits(); 56691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman unsigned NumElements = VT->getNumElements(); 5671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 56859b5da6d853b4368b984700315adf7b37de05764Nate Begeman QualType EltTy = VT->getElementType(); 56959b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::SmallVector<APValue, 4> Elements; 57059b5da6d853b4368b984700315adf7b37de05764Nate Begeman 57191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman for (unsigned i = 0; i < NumElements; i++) { 57259b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (EltTy->isIntegerType()) { 57359b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APSInt sInt(32); 57491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (i < NumInits) { 57591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!EvaluateInteger(E->getInit(i), sInt, Info)) 57691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 57791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 57891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman sInt = Info.Ctx.MakeIntValue(0, EltTy); 57991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 58059b5da6d853b4368b984700315adf7b37de05764Nate Begeman Elements.push_back(APValue(sInt)); 58159b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else { 58259b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APFloat f(0.0); 58391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (i < NumInits) { 58491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!EvaluateFloat(E->getInit(i), f, Info)) 58591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 58691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 58791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman f = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy)); 58891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 58959b5da6d853b4368b984700315adf7b37de05764Nate Begeman Elements.push_back(APValue(f)); 59059b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 59159b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 59259b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(&Elements[0], Elements.size()); 59359b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 59459b5da6d853b4368b984700315adf7b37de05764Nate Begeman 5951eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 59691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanVectorExprEvaluator::GetZeroVector(QualType T) { 59791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman const VectorType *VT = T->getAsVectorType(); 59891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman QualType EltTy = VT->getElementType(); 59991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue ZeroElement; 60091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EltTy->isIntegerType()) 60191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = APValue(Info.Ctx.MakeIntValue(0, EltTy)); 60291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman else 60391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = 60491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue(APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy))); 60591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 60691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman llvm::SmallVector<APValue, 4> Elements(VT->getNumElements(), ZeroElement); 60791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(&Elements[0], Elements.size()); 60891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 60991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 61091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 61191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman bool BoolResult; 61291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 61391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 61491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 61591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 61691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 61791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue Result; 61891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EvaluateVector(EvalExpr, Result, Info)) 61991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return Result; 62091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 62191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 62291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 62391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 62491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 62591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Info.EvalResult.HasSideEffects = true; 62691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return GetZeroVector(E->getType()); 62791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 62891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 62959b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 630f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Integer Evaluation 631f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 632f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 633f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnernamespace { 634f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerclass VISIBILITY_HIDDEN IntExprEvaluator 635b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner : public StmtVisitor<IntExprEvaluator, bool> { 63687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 63730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue &Result; 638f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerpublic: 63930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar IntExprEvaluator(EvalInfo &info, APValue &result) 64087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner : Info(info), Result(result) {} 641f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 6423f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar bool Success(const llvm::APSInt &SI, const Expr *E) { 6434fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar assert(E->getType()->isIntegralType() && "Invalid evaluation result."); 64430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.isSigned() == E->getType()->isSignedIntegerType() && 6453f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 64630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 6473f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 64830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(SI); 6493f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 6503f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 6513f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 652131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(const llvm::APInt &I, const Expr *E) { 6534fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar assert(E->getType()->isIntegralType() && "Invalid evaluation result."); 65430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(I.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 6553f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 65630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(APSInt(I)); 65730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt().setIsUnsigned(E->getType()->isUnsignedIntegerType()); 658131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 659131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 660131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 661131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(uint64_t Value, const Expr *E) { 6624fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar assert(E->getType()->isIntegralType() && "Invalid evaluation result."); 66330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(Info.Ctx.MakeIntValue(Value, E->getType())); 664131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 665131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 666131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 66782206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Error(SourceLocation L, diag::kind D, const Expr *E) { 66832fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // Take the first error. 66954da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson if (Info.EvalResult.Diag == 0) { 67054da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.DiagLoc = L; 67154da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.Diag = D; 67282206e267ce6cc709797127616f64672d255b310Anders Carlsson Info.EvalResult.DiagExpr = E; 67332fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 67454176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return false; 6757a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner } 6761eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 677f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 678f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner // Visitor Methods 679f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 6801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 68132fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitStmt(Stmt *) { 68232fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner assert(0 && "This should be called on integers, stmts are not integers"); 68332fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner return false; 68432fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 6851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 68632fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitExpr(Expr *E) { 6870e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 688f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner } 6891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 690b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 691f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 6924c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitIntegerLiteral(const IntegerLiteral *E) { 693131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 6944c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 6954c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCharacterLiteral(const CharacterLiteral *E) { 696131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 6974c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 6984c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitTypesCompatibleExpr(const TypesCompatibleExpr *E) { 699ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // Per gcc docs "this built-in function ignores top level 700ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // qualifiers". We need to use the canonical version to properly 701ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // be able to strip CRV qualifiers from the type. 702ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T0 = Info.Ctx.getCanonicalType(E->getArgType1()); 703ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T1 = Info.Ctx.getCanonicalType(E->getArgType2()); 7041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(Info.Ctx.typesAreCompatible(T0.getUnqualifiedType(), 705131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar T1.getUnqualifiedType()), 706131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 7074c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 7084c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitDeclRefExpr(const DeclRefExpr *E); 7094c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCallExpr(const CallExpr *E); 710b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitBinaryOperator(const BinaryOperator *E); 711b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitUnaryOperator(const UnaryOperator *E); 712ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes bool VisitConditionalOperator(const ConditionalOperator *E); 713f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 714a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool VisitCastExpr(CastExpr* E); 7150518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl bool VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E); 7160518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 7173068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 718131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 7193068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 7201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7213f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson bool VisitGNUNullExpr(const GNUNullExpr *E) { 722131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 7233f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson } 7241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 7253068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXZeroInitValueExpr(const CXXZeroInitValueExpr *E) { 726131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 7273068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 7283068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 729664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { 730664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 731664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman } 732664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 73364b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) { 7345e03f9ea8174ae588c5e69ec6b5ef4c68f8fd766Douglas Gregor return Success(E->EvaluateTrait(Info.Ctx), E); 73564b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl } 73664b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl 737ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) { 738ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman return Visit(E->getChosenSubExpr(Info.Ctx)); 739ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman } 740ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 741722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman bool VisitUnaryReal(const UnaryOperator *E); 742664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitUnaryImag(const UnaryOperator *E); 743664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 744fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattnerprivate: 745af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner unsigned GetAlignOfExpr(const Expr *E); 746af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner unsigned GetAlignOfType(QualType T); 747664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman // FIXME: Missing: array subscript of vector, member of vector 748f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner}; 749f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 750f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 75169ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateIntegerOrLValue(const Expr* E, APValue &Result, EvalInfo &Info) { 7523f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!E->getType()->isIntegralType()) 7533f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return false; 7541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 75569ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return IntExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 75669ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar} 75769ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 75869ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateInteger(const Expr* E, APSInt &Result, EvalInfo &Info) { 75930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue Val; 76069ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (!EvaluateIntegerOrLValue(E, Val, Info) || !Val.isInt()) 76130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 76230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = Val.getInt(); 76330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return true; 764f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 765f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 7664c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattnerbool IntExprEvaluator::VisitDeclRefExpr(const DeclRefExpr *E) { 7674c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Enums are integer constant exprs. 7684c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner if (const EnumConstantDecl *D = dyn_cast<EnumConstantDecl>(E->getDecl())) { 769e9a0f43927041e2bcc89140c338dfae207ad3c3bEli Friedman // FIXME: This is an ugly hack around the fact that enums don't set their 7703f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // signedness consistently; see PR3173. 7713f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar APSInt SI = D->getInitVal(); 7723f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar SI.setIsUnsigned(!E->getType()->isSignedIntegerType()); 7733f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // FIXME: This is an ugly hack around the fact that enums don't 7743f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // set their width (!?!) consistently; see PR3173. 7753f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar SI.extOrTrunc(Info.Ctx.getIntWidth(E->getType())); 7763f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(SI, E); 7774c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 778b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 779b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl // In C++, const, non-volatile integers initialized with ICEs are ICEs. 780e1646da3bb0fe97b372e5fe8cefc537b22048fc4Eli Friedman // In C, they can also be folded, although they are not ICEs. 781e1646da3bb0fe97b372e5fe8cefc537b22048fc4Eli Friedman if (E->getType().getCVRQualifiers() == QualType::Const) { 782b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl if (const VarDecl *D = dyn_cast<VarDecl>(E->getDecl())) { 78378d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor if (APValue *V = D->getEvaluatedValue()) 78478d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return Success(V->getInt(), E); 78578d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor if (const Expr *Init = D->getInit()) { 78678d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor if (Visit(const_cast<Expr*>(Init))) { 78778d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor // Cache the evaluated value in the variable declaration. 78878d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor D->setEvaluatedValue(Info.Ctx, Result); 78978d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return true; 79078d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 79178d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor 79278d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return false; 79378d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 794b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 795b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 796b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 7974c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Otherwise, random variable references are not constants. 7980e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 7994c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 8004c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner 801a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way 802a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// as GCC. 803a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattnerstatic int EvaluateBuiltinClassifyType(const CallExpr *E) { 804a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // The following enum mimics the values returned by GCC. 8057c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl // FIXME: Does GCC differ between lvalue and rvalue references here? 806a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enum gcc_type_class { 807a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner no_type_class = -1, 808a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner void_type_class, integer_type_class, char_type_class, 809a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enumeral_type_class, boolean_type_class, 810a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner pointer_type_class, reference_type_class, offset_type_class, 811a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner real_type_class, complex_type_class, 812a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner function_type_class, method_type_class, 813a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner record_type_class, union_type_class, 814a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner array_type_class, string_type_class, 815a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner lang_type_class 816a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner }; 8171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If no argument was supplied, default to "no_type_class". This isn't 819a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // ideal, however it is what gcc does. 820a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (E->getNumArgs() == 0) 821a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return no_type_class; 8221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 823a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner QualType ArgTy = E->getArg(0)->getType(); 824a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (ArgTy->isVoidType()) 825a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return void_type_class; 826a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isEnumeralType()) 827a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return enumeral_type_class; 828a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isBooleanType()) 829a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return boolean_type_class; 830a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isCharType()) 831a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return string_type_class; // gcc doesn't appear to use char_type_class 832a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isIntegerType()) 833a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return integer_type_class; 834a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isPointerType()) 835a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return pointer_type_class; 836a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isReferenceType()) 837a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return reference_type_class; 838a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isRealType()) 839a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return real_type_class; 840a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isComplexType()) 841a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return complex_type_class; 842a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isFunctionType()) 843a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return function_type_class; 844a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isStructureType()) 845a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return record_type_class; 846a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 847a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 848a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isArrayType()) 849a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return array_type_class; 850a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 851a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 852a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else // FIXME: offset_type_class, method_type_class, & lang_type_class? 853a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner assert(0 && "CallExpr::isBuiltinClassifyType(): unimplemented type"); 854a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return -1; 855a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner} 856a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 8574c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattnerbool IntExprEvaluator::VisitCallExpr(const CallExpr *E) { 8583c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 859019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner default: 8600e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 861019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_classify_type: 862131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(EvaluateBuiltinClassifyType(E), E); 8631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 8644bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson case Builtin::BI__builtin_constant_p: 865019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // __builtin_constant_p always has one operand: it returns true if that 866019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // operand can be folded, false otherwise. 867131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getArg(0)->isEvaluatable(Info.Ctx), E); 868019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 8694c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 870f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 871b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 872a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == BinaryOperator::Comma) { 873027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson if (!Visit(E->getRHS())) 874027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return false; 8754fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson 87633ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // If we can't evaluate the LHS, it might have side effects; 87733ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // conservatively mark it. 87833ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 87933ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman Info.EvalResult.HasSideEffects = true; 880c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner 881027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return true; 882a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 883a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 884a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->isLogicalOp()) { 885a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // These need to be handled specially because the operands aren't 886a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // necessarily integral 887fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool lhsResult, rhsResult; 8881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 889fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getLHS(), lhsResult, Info)) { 89051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // We were able to evaluate the LHS, see if we can get away with not 89151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // evaluating the RHS: 0 && X -> 0, 1 || X -> 1 89233ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman if (lhsResult == (E->getOpcode() == BinaryOperator::LOr)) 8933f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(lhsResult, E); 894a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 895fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 8964bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson if (E->getOpcode() == BinaryOperator::LOr) 897131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult || rhsResult, E); 8984bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson else 899131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult && rhsResult, E); 9004bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 9014bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } else { 902fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 9034bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // We can't evaluate the LHS; however, sometimes the result 9044bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // is determined by the RHS: X && 0 -> 0, X || 1 -> 1. 9051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (rhsResult == (E->getOpcode() == BinaryOperator::LOr) || 906fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson !rhsResult == (E->getOpcode() == BinaryOperator::LAnd)) { 907131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // Since we weren't able to evaluate the left hand side, it 908fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // must have had side effects. 909fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson Info.EvalResult.HasSideEffects = true; 910131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 911131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(rhsResult, E); 9124bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 9134bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 914a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 915a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 916a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 917c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner } 91854176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 919286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType LHSTy = E->getLHS()->getType(); 920286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType RHSTy = E->getRHS()->getType(); 9214087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 9224087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHSTy->isAnyComplexType()) { 9234087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar assert(RHSTy->isAnyComplexType() && "Invalid comparison"); 9244087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar APValue LHS, RHS; 9254087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 9264087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getLHS(), LHS, Info)) 9274087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 9284087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 9294087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 9304087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 9314087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 9324087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHS.isComplexFloat()) { 9331eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_r = 9344087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatReal().compare(RHS.getComplexFloatReal()); 9351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_i = 9364087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatImag().compare(RHS.getComplexFloatImag()); 9374087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 9384087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 939131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((CR_r == APFloat::cmpEqual && 940131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpEqual), E); 941131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 942131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 943131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid complex comparison."); 9441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(((CR_r == APFloat::cmpGreaterThan || 945131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_r == APFloat::cmpLessThan) && 9461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (CR_i == APFloat::cmpGreaterThan || 947131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpLessThan)), E); 948131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 9494087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } else { 9504087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 951131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() == RHS.getComplexIntReal() && 952131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() == RHS.getComplexIntImag()), E); 953131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 954131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 955131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid compex comparison."); 956131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() != RHS.getComplexIntReal() || 957131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() != RHS.getComplexIntImag()), E); 958131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 9594087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 9604087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 9611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 962286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (LHSTy->isRealFloatingType() && 963286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson RHSTy->isRealFloatingType()) { 964286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat RHS(0.0), LHS(0.0); 9651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 966286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getRHS(), RHS, Info)) 967286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 9681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 969286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getLHS(), LHS, Info)) 970286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 9711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 972286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat::cmpResult CR = LHS.compare(RHS); 973529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson 974286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson switch (E->getOpcode()) { 975286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson default: 976286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson assert(0 && "Invalid binary operator!"); 977286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LT: 978131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan, E); 979286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GT: 980131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan, E); 981286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LE: 982131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan || CR == APFloat::cmpEqual, E); 983286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GE: 9841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan || CR == APFloat::cmpEqual, 985131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 986286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::EQ: 987131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpEqual, E); 988286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::NE: 9891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan 990131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar || CR == APFloat::cmpLessThan, E); 991286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 992286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 9931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 994ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (LHSTy->isPointerType() && RHSTy->isPointerType()) { 995ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::Sub || E->isEqualityOp()) { 9963068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue LHSValue; 9973068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getLHS(), LHSValue, Info)) 9983068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 999a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 10003068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue RHSValue; 10013068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getRHS(), RHSValue, Info)) 10023068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1003a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 10045bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // Reject any bases from the normal codepath; we special-case comparisons 10055bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // to null. 10065bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (LHSValue.getLValueBase()) { 10075bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 10085bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 10095bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (RHSValue.getLValueBase() || RHSValue.getLValueOffset()) 10105bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 10115bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 10125bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(LHSValue, bres)) 10135bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 10145bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return Success(bres ^ (E->getOpcode() == BinaryOperator::EQ), E); 10155bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } else if (RHSValue.getLValueBase()) { 10165bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 10175bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 10185bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (LHSValue.getLValueBase() || LHSValue.getLValueOffset()) 10195bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 10205bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 10215bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(RHSValue, bres)) 10225bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 10235bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return Success(bres ^ (E->getOpcode() == BinaryOperator::EQ), E); 10245bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } 1025a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1026ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::Sub) { 1027ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman const QualType Type = E->getLHS()->getType(); 10286217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek const QualType ElementType = Type->getAs<PointerType>()->getPointeeType(); 10293068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 1030ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman uint64_t D = LHSValue.getLValueOffset() - RHSValue.getLValueOffset(); 1031ce1bca73aef9bbf6359ab8420278203dda81a054Eli Friedman if (!ElementType->isVoidType() && !ElementType->isFunctionType()) 1032ce1bca73aef9bbf6359ab8420278203dda81a054Eli Friedman D /= Info.Ctx.getTypeSize(ElementType) / 8; 1033a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1034ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman return Success(D, E); 1035ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1036ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman bool Result; 1037ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::EQ) { 1038ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() == RHSValue.getLValueOffset(); 1039267c0ab1b9a15768f3f15abbfc40ce344751c78bEli Friedman } else { 1040ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() != RHSValue.getLValueOffset(); 1041ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1042ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman return Success(Result, E); 10433068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 10443068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 1045286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!LHSTy->isIntegralType() || 1046286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson !RHSTy->isIntegralType()) { 1047a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // We can't continue from here for non-integral types, and they 1048a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // could potentially confuse the following operations. 1049a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1050a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1051a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1052a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // The LHS of a constant expr is always evaluated and needed. 105330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Visit(E->getLHS())) 1054a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; // error in subexpression. 1055d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman 105642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APValue RHSVal; 105742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!EvaluateIntegerOrLValue(E->getRHS(), RHSVal, Info)) 105830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 105942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 106042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like (unsigned long)&a + 4. 106142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->isAdditiveOp() && Result.isLValue() && RHSVal.isInt()) { 106242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman uint64_t offset = Result.getLValueOffset(); 106342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->getOpcode() == BinaryOperator::Add) 106442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman offset += RHSVal.getInt().getZExtValue(); 106542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman else 106642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman offset -= RHSVal.getInt().getZExtValue(); 106742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman Result = APValue(Result.getLValueBase(), offset); 106842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 106942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 107042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 107142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like 4 + (unsigned long)&a 107242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->getOpcode() == BinaryOperator::Add && 107342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman RHSVal.isLValue() && Result.isInt()) { 107442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman uint64_t offset = RHSVal.getLValueOffset(); 107542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman offset += Result.getInt().getZExtValue(); 107642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman Result = APValue(RHSVal.getLValueBase(), offset); 107742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 107842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 107942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 108042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // All the following cases expect both operands to be an integer 108142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!Result.isInt() || !RHSVal.isInt()) 1082b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1083a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 108442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APSInt& RHS = RHSVal.getInt(); 108542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 1086a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson switch (E->getOpcode()) { 108732fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner default: 10880e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 108930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Mul: return Success(Result.getInt() * RHS, E); 109030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Add: return Success(Result.getInt() + RHS, E); 109130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Sub: return Success(Result.getInt() - RHS, E); 109230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::And: return Success(Result.getInt() & RHS, E); 109330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Xor: return Success(Result.getInt() ^ RHS, E); 109430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Or: return Success(Result.getInt() | RHS, E); 1095a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Div: 109654176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 10970e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 109830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() / RHS, E); 1099a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Rem: 110054176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 11010e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 110230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() % RHS, E); 11033f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shl: { 110454176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner // FIXME: Warn about out of range shift amounts! 11051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 110630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 110730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() << SA, E); 11083f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 11093f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shr: { 11101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 111130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 111230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() >> SA, E); 11133f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 11141eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 111530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LT: return Success(Result.getInt() < RHS, E); 111630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GT: return Success(Result.getInt() > RHS, E); 111730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LE: return Success(Result.getInt() <= RHS, E); 111830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GE: return Success(Result.getInt() >= RHS, E); 111930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::EQ: return Success(Result.getInt() == RHS, E); 112030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::NE: return Success(Result.getInt() != RHS, E); 1121b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 1122a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 1123a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 1124ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopesbool IntExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 1125a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes bool Cond; 1126a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes if (!HandleConversionToBool(E->getCond(), Cond, Info)) 1127ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes return false; 1128ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 1129a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 1130ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes} 1131ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 1132af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattnerunsigned IntExprEvaluator::GetAlignOfType(QualType T) { 1133e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the alignment. 1134e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner unsigned CharSize = Info.Ctx.Target.getCharWidth(); 113518857644059c45da6776f1a288eec7b4cf3a844aDouglas Gregor 11362be586108bb401019647791feca19ea03fd477ceEli Friedman // __alignof is defined to return the preferred alignment. 113718857644059c45da6776f1a288eec7b4cf3a844aDouglas Gregor return Info.Ctx.getPreferredTypeAlign(T.getTypePtr()) / CharSize; 1138e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1139e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1140af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattnerunsigned IntExprEvaluator::GetAlignOfExpr(const Expr *E) { 1141af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner E = E->IgnoreParens(); 1142af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1143af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // alignof decl is always accepted, even if it doesn't make sense: we default 11441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // to 1 in those cases. 1145af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 1146b7d0844c887a72064b624dc6df12cbe1441f69d0Daniel Dunbar return Info.Ctx.getDeclAlignInBytes(DRE->getDecl()); 1147a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1148af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) 1149b7d0844c887a72064b624dc6df12cbe1441f69d0Daniel Dunbar return Info.Ctx.getDeclAlignInBytes(ME->getMemberDecl()); 1150af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1151e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(E->getType()); 1152e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1153e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1154e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 11550518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// VisitSizeAlignOfExpr - Evaluate a sizeof or alignof with a result as the 11560518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// expression's type. 11570518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redlbool IntExprEvaluator::VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E) { 11580518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType DstTy = E->getType(); 1159fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 1160e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Handle alignof separately. 1161e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!E->isSizeOf()) { 1162e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (E->isArgumentType()) 1163131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(GetAlignOfType(E->getArgumentType()), E); 1164e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner else 1165131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(GetAlignOfExpr(E->getArgumentExpr()), E); 1166e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner } 1167a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 11680518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType SrcTy = E->getTypeOfArgument(); 11690518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 1170131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc 1171131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // extension. 1172131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar if (SrcTy->isVoidType() || SrcTy->isFunctionType()) 1173131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(1, E); 1174a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1175fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. 1176e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!SrcTy->isConstantSizeType()) 1177fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner return false; 1178f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 1179e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the size. 118024cbfb96f09318f59dc73eaaf4909a79788ec5acDaniel Dunbar unsigned BitWidth = Info.Ctx.getTypeSize(SrcTy); 1181ff89666e8d143b52f2bb5d2c3a108125d523abb7Daniel Dunbar return Success(BitWidth / Info.Ctx.Target.getCharWidth(), E); 1182fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner} 1183fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 1184b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 11854c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Special case unary operators that do not need their subexpression 11864c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // evaluated. offsetof/sizeof/alignof are all special. 118735183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (E->isOffsetOfOp()) { 118835183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman // The AST for offsetof is defined in such a way that we can just 118935183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman // directly Evaluate it as an l-value. 119035183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman APValue LV; 119135183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (!EvaluateLValue(E->getSubExpr(), LV, Info)) 119235183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman return false; 119335183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (LV.getLValueBase()) 119435183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman return false; 119535183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman return Success(LV.getLValueOffset(), E); 119635183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman } 1197a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1198a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == UnaryOperator::LNot) { 1199a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // LNot's operand isn't necessarily an integer, so we handle it specially. 1200a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman bool bres; 1201a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!HandleConversionToBool(E->getSubExpr(), bres, Info)) 1202a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1203131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(!bres, E); 1204a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1205a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 12064fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar // Only handle integral operations... 12074fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar if (!E->getSubExpr()->getType()->isIntegralType()) 12084fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar return false; 12094fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar 121087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner // Get the operand value into 'Result'. 121187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!Visit(E->getSubExpr())) 121275a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner return false; 1213a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 121475a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner switch (E->getOpcode()) { 12154c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner default: 121675a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 121775a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // See C99 6.6p3. 12180e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 121975a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Extension: 12204c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // FIXME: Should extension allow i-c-e extension expressions in its scope? 12214c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // If so, we could clear the diagnostic ID. 12223f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 122375a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Plus: 12241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // The result is always just the subexpr. 12253f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 122675a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Minus: 122730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 122830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(-Result.getInt(), E); 122975a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Not: 123030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 123130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(~Result.getInt(), E); 123206a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson } 1233a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 12341eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1235732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// HandleCast - This is used to evaluate implicit or explicit casts where the 1236732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// result type is integer. 1237a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarbool IntExprEvaluator::VisitCastExpr(CastExpr *E) { 123882206e267ce6cc709797127616f64672d255b310Anders Carlsson Expr *SubExpr = E->getSubExpr(); 123982206e267ce6cc709797127616f64672d255b310Anders Carlsson QualType DestType = E->getType(); 1240b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar QualType SrcType = SubExpr->getType(); 124182206e267ce6cc709797127616f64672d255b310Anders Carlsson 12424efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (DestType->isBooleanType()) { 12434efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 12444efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(SubExpr, BoolResult, Info)) 12454efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1246131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(BoolResult, E); 12474efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 12484efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1249a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson // Handle simple integer->integer casts. 1250b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (SrcType->isIntegralType()) { 1251732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!Visit(SubExpr)) 1252b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1253a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1254be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!Result.isInt()) { 1255be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // Only allow casts of lvalues if they are lossless. 1256be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return Info.Ctx.getTypeSize(DestType) == Info.Ctx.getTypeSize(SrcType); 1257be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 125830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 1259dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, 126030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt(), Info.Ctx), E); 1261732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner } 12621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1263732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner // FIXME: Clean this up! 1264b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (SrcType->isPointerType()) { 1265a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson APValue LV; 126687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(SubExpr, LV, Info)) 1267b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 12684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1269dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (LV.getLValueBase()) { 1270dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar // Only allow based lvalue casts if they are lossless. 1271dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(SrcType)) 1272dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return false; 1273dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar 1274dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar Result = LV; 1275dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return true; 1276dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar } 12774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1278dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar APSInt AsInt = Info.Ctx.MakeIntValue(LV.getLValueOffset(), SrcType); 1279dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, AsInt, Info.Ctx), E); 12802bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 12814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1282be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (SrcType->isArrayType() || SrcType->isFunctionType()) { 1283be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // This handles double-conversion cases, where there's both 1284be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // an l-value promotion and an implicit conversion to int. 1285be26570e3faa009bdcefedfaf04473e518940520Eli Friedman APValue LV; 1286be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!EvaluateLValue(SubExpr, LV, Info)) 1287be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1288be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1289be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(Info.Ctx.VoidPtrTy)) 1290be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1291be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1292be26570e3faa009bdcefedfaf04473e518940520Eli Friedman Result = LV; 1293be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return true; 1294be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 1295be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 12961725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (SrcType->isAnyComplexType()) { 12971725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APValue C; 12981725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (!EvaluateComplex(SubExpr, C, Info)) 12991725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return false; 13001725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (C.isComplexFloat()) 13011725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleFloatToIntCast(DestType, SrcType, 13021725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexFloatReal(), Info.Ctx), 13031725f683432715e5afe34d476024bd6f16eac3fcEli Friedman E); 13041725f683432715e5afe34d476024bd6f16eac3fcEli Friedman else 13051725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleIntToIntCast(DestType, SrcType, 13061725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexIntReal(), Info.Ctx), E); 13071725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 13082217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // FIXME: Handle vectors 13092217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1310b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (!SrcType->isRealFloatingType()) 13110e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1312732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 1313d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat F(0.0); 1314d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(SubExpr, F, Info)) 13150e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 13161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1317b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar return Success(HandleFloatToIntCast(DestType, SrcType, F, Info.Ctx), E); 1318a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 13192bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 1320722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedmanbool IntExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 1321722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 1322722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman APValue LV; 1323722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1324722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1325722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntReal(), E); 1326722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1327722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1328722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Visit(E->getSubExpr()); 1329722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman} 1330722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1331664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedmanbool IntExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 1332722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isComplexIntegerType()) { 1333722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman APValue LV; 1334722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1335722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1336722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntImag(), E); 1337722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1338722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1339664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 1340664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman Info.EvalResult.HasSideEffects = true; 1341664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 1342664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman} 1343664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 1344f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1345d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman// Float Evaluation 1346d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1347d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1348d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmannamespace { 1349d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanclass VISIBILITY_HIDDEN FloatExprEvaluator 1350d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : public StmtVisitor<FloatExprEvaluator, bool> { 1351d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman EvalInfo &Info; 1352d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat &Result; 1353d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanpublic: 1354d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman FloatExprEvaluator(EvalInfo &info, APFloat &result) 1355d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : Info(info), Result(result) {} 1356d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1357d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitStmt(Stmt *S) { 1358d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1359d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1360d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1361d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 1362019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner bool VisitCallExpr(const CallExpr *E); 1363d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 13645db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar bool VisitUnaryOperator(const UnaryOperator *E); 1365d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 1366d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitFloatingLiteral(const FloatingLiteral *E); 13674efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCastExpr(CastExpr *E); 13684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E); 13692217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1370ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) 1371ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 1372ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitUnaryExtension(const UnaryOperator *E) 1373ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 1374ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 1375ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: __real__/__imag__, array subscript of vector, 1376ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // member of vector, ImplicitValueInitExpr, 13772217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // conditional ?:, comma 1378d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman}; 1379d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} // end anonymous namespace 1380d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1381d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) { 1382d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return FloatExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 1383d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1384d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1385019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattnerbool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) { 13863c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 138734a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner default: return false; 1388019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_val: 1389019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_valf: 1390019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_vall: 1391019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inf: 1392019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inff: 13937cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar case Builtin::BI__builtin_infl: { 13947cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 13957cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 139634a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner Result = llvm::APFloat::getInf(Sem); 139734a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner return true; 13987cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar } 13991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14009e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nan: 14019e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanf: 14029e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanl: 14034572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump // If this is __builtin_nan() turn this into a nan, otherwise we 14049e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // can't constant fold it. 14051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (const StringLiteral *S = 14069e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner dyn_cast<StringLiteral>(E->getArg(0)->IgnoreParenCasts())) { 14074572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump if (!S->isWide()) { 14087cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 14097cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 14107462b39a9bccaf4392687831036713f09f9c0681Mike Stump llvm::SmallString<16> s; 14117462b39a9bccaf4392687831036713f09f9c0681Mike Stump s.append(S->getStrData(), S->getStrData() + S->getByteLength()); 14127462b39a9bccaf4392687831036713f09f9c0681Mike Stump s += '\0'; 14134572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump long l; 14144572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump char *endp; 14157462b39a9bccaf4392687831036713f09f9c0681Mike Stump l = strtol(&s[0], &endp, 0); 14167462b39a9bccaf4392687831036713f09f9c0681Mike Stump if (endp != s.end()-1) 14174572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump return false; 14184572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump unsigned type = (unsigned int)l;; 14194572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump Result = llvm::APFloat::getNaN(Sem, false, type); 14209e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner return true; 14219e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner } 14229e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner } 14239e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner return false; 14245db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 14255db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabs: 14265db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsf: 14275db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsl: 14285db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info)) 14295db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 14301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14315db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (Result.isNegative()) 14325db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 14335db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 14345db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 14351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysign: 14361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysignf: 14375db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignl: { 14385db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.); 14395db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info) || 14405db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar !EvaluateFloat(E->getArg(1), RHS, Info)) 14415db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 14425db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.copySign(RHS); 14435db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 14445db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 1445019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 1446019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner} 1447019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 14485db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbarbool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 1449a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes if (E->getOpcode() == UnaryOperator::Deref) 1450a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes return false; 1451a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes 14525db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getSubExpr(), Result, Info)) 14535db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 14545db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 14555db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar switch (E->getOpcode()) { 14565db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar default: return false; 14571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case UnaryOperator::Plus: 14585db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 14595db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case UnaryOperator::Minus: 14605db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 14615db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 14625db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 14635db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar} 1464019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 1465d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 1466d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // FIXME: Diagnostics? I really don't understand how the warnings 1467d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // and errors are supposed to work. 14685db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.0); 1469d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getLHS(), Result, Info)) 1470d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1471d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1472d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1473d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1474d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman switch (E->getOpcode()) { 1475d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman default: return false; 1476d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Mul: 1477d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.multiply(RHS, APFloat::rmNearestTiesToEven); 1478d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1479d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Add: 1480d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.add(RHS, APFloat::rmNearestTiesToEven); 1481d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1482d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Sub: 1483d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.subtract(RHS, APFloat::rmNearestTiesToEven); 1484d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1485d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Div: 1486d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.divide(RHS, APFloat::rmNearestTiesToEven); 1487d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1488d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1489d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1490d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1491d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) { 1492d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result = E->getValue(); 1493d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1494d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1495d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 14964efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCastExpr(CastExpr *E) { 14974efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* SubExpr = E->getSubExpr(); 14981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14994efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isIntegralType()) { 15004efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 15013f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!EvaluateInteger(SubExpr, IntResult, Info)) 15024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 15031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result = HandleIntToFloatCast(E->getType(), SubExpr->getType(), 1504a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar IntResult, Info.Ctx); 15054efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 15064efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 15074efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isRealFloatingType()) { 15084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!Visit(SubExpr)) 15094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1510a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(E->getType(), SubExpr->getType(), 1511a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result, Info.Ctx); 15124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 15134efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 15142217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // FIXME: Handle complex types 15154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 15164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 15174efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 15184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 15194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) { 15204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(E->getType())); 15214efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 15224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 15234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1524d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1525a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar// Complex Evaluation (for float and integer) 15269ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 15279ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 15289ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonnamespace { 1529a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbarclass VISIBILITY_HIDDEN ComplexExprEvaluator 1530a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar : public StmtVisitor<ComplexExprEvaluator, APValue> { 15319ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson EvalInfo &Info; 15321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15339ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonpublic: 1534a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar ComplexExprEvaluator(EvalInfo &info) : Info(info) {} 15351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15369ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 15379ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson // Visitor Methods 15389ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 15399ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 15409ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitStmt(Stmt *S) { 15419ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson return APValue(); 15429ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 15431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15449ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 15459ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 15469ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitImaginaryLiteral(ImaginaryLiteral *E) { 1547a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Expr* SubExpr = E->getSubExpr(); 1548a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1549a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (SubExpr->getType()->isRealFloatingType()) { 1550a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat Result(0.0); 1551a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1552a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateFloat(SubExpr, Result, Info)) 1553a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 15541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 15551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(APFloat(Result.getSemantics(), APFloat::fcZero, false), 1556a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result); 1557a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 15581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(SubExpr->getType()->isIntegerType() && 1559a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar "Unexpected imaginary literal."); 1560a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1561a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Result; 1562a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateInteger(SubExpr, Result, Info)) 1563a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 15641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1565a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Zero(Result.getBitWidth(), !Result.isSigned()); 1566a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Zero = 0; 1567a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(Zero, Result); 1568a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 15699ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 15709ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 1571ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue VisitCastExpr(CastExpr *E) { 1572ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson Expr* SubExpr = E->getSubExpr(); 1573a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType EltType = E->getType()->getAsComplexType()->getElementType(); 1574a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SubType = SubExpr->getType(); 1575ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1576a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (SubType->isRealFloatingType()) { 1577ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APFloat Result(0.0); 15781725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 1579ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson if (!EvaluateFloat(SubExpr, Result, Info)) 1580ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 15811725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 15821725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (EltType->isRealFloatingType()) { 15831725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Result = HandleFloatToFloatCast(EltType, SubType, Result, Info.Ctx); 15841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(Result, 15851725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APFloat(Result.getSemantics(), APFloat::fcZero, false)); 15861725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } else { 15871725f683432715e5afe34d476024bd6f16eac3fcEli Friedman llvm::APSInt IResult; 15881725f683432715e5afe34d476024bd6f16eac3fcEli Friedman IResult = HandleFloatToIntCast(EltType, SubType, Result, Info.Ctx); 15891725f683432715e5afe34d476024bd6f16eac3fcEli Friedman llvm::APSInt Zero(IResult.getBitWidth(), !IResult.isSigned()); 15901725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Zero = 0; 15911725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return APValue(IResult, Zero); 15921725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 1593a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else if (SubType->isIntegerType()) { 1594a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APSInt Result; 15951725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 1596a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateInteger(SubExpr, Result, Info)) 1597a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 1598a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 15991725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (EltType->isRealFloatingType()) { 16001725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APFloat FResult = 16011725f683432715e5afe34d476024bd6f16eac3fcEli Friedman HandleIntToFloatCast(EltType, SubType, Result, Info.Ctx); 16021eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(FResult, 16031725f683432715e5afe34d476024bd6f16eac3fcEli Friedman APFloat(FResult.getSemantics(), APFloat::fcZero, false)); 16041725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } else { 16051725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Result = HandleIntToIntCast(EltType, SubType, Result, Info.Ctx); 16061725f683432715e5afe34d476024bd6f16eac3fcEli Friedman llvm::APSInt Zero(Result.getBitWidth(), !Result.isSigned()); 16071725f683432715e5afe34d476024bd6f16eac3fcEli Friedman Zero = 0; 16081725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return APValue(Result, Zero); 16091725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 1610a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else if (const ComplexType *CT = SubType->getAsComplexType()) { 1611a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APValue Src; 16121725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 1613a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (!EvaluateComplex(SubExpr, Src, Info)) 1614a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(); 1615a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1616a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SrcType = CT->getElementType(); 1617a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1618a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (Src.isComplexFloat()) { 1619a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 16201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(HandleFloatToFloatCast(EltType, SrcType, 1621a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatReal(), 1622a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 16231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleFloatToFloatCast(EltType, SrcType, 1624a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatImag(), 1625a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1626a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1627a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleFloatToIntCast(EltType, SrcType, 1628a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatReal(), 1629a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 16301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleFloatToIntCast(EltType, SrcType, 1631a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatImag(), 16321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Info.Ctx)); 1633a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1634a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1635a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar assert(Src.isComplexInt() && "Invalid evaluate result."); 1636a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 16371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return APValue(HandleIntToFloatCast(EltType, SrcType, 1638a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntReal(), 1639a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 16401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleIntToFloatCast(EltType, SrcType, 1641a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntImag(), 1642a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1643a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1644a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleIntToIntCast(EltType, SrcType, 1645a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntReal(), 1646a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 16471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump HandleIntToIntCast(EltType, SrcType, 1648a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntImag(), 16491eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Info.Ctx)); 1650a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1651a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1652ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1653ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1654ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson // FIXME: Handle more casts. 1655ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1656ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 16571eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1658ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue VisitBinaryOperator(const BinaryOperator *E); 1659ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 1660ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 1661ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 1662ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 1663ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME Missing: unary +/-/~, binary div, ImplicitValueInitExpr, 16642217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // conditional ?:, comma 16659ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson}; 16669ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} // end anonymous namespace 16679ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 16681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic bool EvaluateComplex(const Expr *E, APValue &Result, EvalInfo &Info) { 1669a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result = ComplexExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 1670a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar assert((!Result.isComplexFloat() || 16711eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (&Result.getComplexFloatReal().getSemantics() == 16721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump &Result.getComplexFloatImag().getSemantics())) && 1673a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar "Invalid complex evaluation."); 1674a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return Result.isComplexFloat() || Result.isComplexInt(); 16759ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} 16769ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 16771eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue ComplexExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 1678ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue Result, RHS; 16791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1680a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getLHS(), Result, Info)) 1681ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 16821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1683a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 1684ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1685a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 16863f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar assert(Result.isComplexFloat() == RHS.isComplexFloat() && 16873f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar "Invalid operands to binary operator."); 1688ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson switch (E->getOpcode()) { 1689ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson default: return APValue(); 1690ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Add: 1691a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 1692a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().add(RHS.getComplexFloatReal(), 1693a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1694a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().add(RHS.getComplexFloatImag(), 1695a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1696a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1697a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() += RHS.getComplexIntReal(); 1698a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() += RHS.getComplexIntImag(); 1699a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 17003f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 1701ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Sub: 1702a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 1703a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().subtract(RHS.getComplexFloatReal(), 1704a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1705a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().subtract(RHS.getComplexFloatImag(), 1706a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1707a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1708a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() -= RHS.getComplexIntReal(); 1709a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() -= RHS.getComplexIntImag(); 1710a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 17113f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 17123f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar case BinaryOperator::Mul: 17133f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar if (Result.isComplexFloat()) { 17143f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APValue LHS = Result; 17153f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_r = LHS.getComplexFloatReal(); 17163f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_i = LHS.getComplexFloatImag(); 17173f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_r = RHS.getComplexFloatReal(); 17183f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_i = RHS.getComplexFloatImag(); 17191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17203f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat Tmp = LHS_r; 17213f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 17223f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal() = Tmp; 17233f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 17243f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 17253f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal().subtract(Tmp, APFloat::rmNearestTiesToEven); 17263f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 17273f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_r; 17283f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 17293f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag() = Tmp; 17303f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 17313f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 17323f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag().add(Tmp, APFloat::rmNearestTiesToEven); 17333f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } else { 17343f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APValue LHS = Result; 17351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntReal() = 17363f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntReal() - 17373f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntImag()); 17381eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntImag() = 17393f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntImag() + 17403f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntReal()); 17413f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } 17423f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 1743ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1744ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1745ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return Result; 1746ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson} 1747ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 17489ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 17496ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner// Top level Expr::Evaluate method. 1750f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1751f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 17526ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// Evaluate - Return true if this is a constant which we can fold using 1753019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// any crazy technique (that has nothing to do with language standards) that 1754019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// we want to. If this function returns true, it returns the folded constant 1755019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// in Result. 17565b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlssonbool Expr::Evaluate(EvalResult &Result, ASTContext &Ctx) const { 17575b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson EvalInfo Info(Ctx, Result); 175854da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson 175959b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (getType()->isVectorType()) { 176059b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!EvaluateVector(this, Result.Val, Info)) 176159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 176259b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else if (getType()->isIntegerType()) { 176330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!IntExprEvaluator(Info, Result.Val).Visit(const_cast<Expr*>(this))) 17646dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 17658958891f5fa1e593c4519a36b3df427ee019d70bDaniel Dunbar } else if (getType()->hasPointerRepresentation()) { 17665b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson if (!EvaluatePointer(this, Result.Val, Info)) 17676dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1768d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } else if (getType()->isRealFloatingType()) { 1769d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman llvm::APFloat f(0.0); 17706dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson if (!EvaluateFloat(this, f, Info)) 17716dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 17721eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 17735b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson Result.Val = APValue(f); 1774a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else if (getType()->isAnyComplexType()) { 1775a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(this, Result.Val, Info)) 17766dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1777a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else 17789d4c157baaada8945671dc98363a40ed00cbd824Anders Carlsson return false; 17796dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson 17805b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson return true; 17815b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson} 17825b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson 17831b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlssonbool Expr::EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const { 17841b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson EvalInfo Info(Ctx, Result); 17851b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 17861b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson return EvaluateLValue(this, Result.Val, Info) && !Result.HasSideEffects; 17871b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson} 17881b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 17896ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// isEvaluatable - Call Evaluate to see if this expression can be constant 179045b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner/// folded, but discard the result. 179145b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattnerbool Expr::isEvaluatable(ASTContext &Ctx) const { 17924fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson EvalResult Result; 17934fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects; 179445b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner} 179551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 179651fe996231b1d7199f76e4005ff4c943d5deeecdAnders CarlssonAPSInt Expr::EvaluateAsInt(ASTContext &Ctx) const { 17971c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 17981c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson bool Result = Evaluate(EvalResult, Ctx); 1799f185319f25efd6094870f287030270fad26085baDaniel Dunbar Result = Result; 180051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson assert(Result && "Could not evaluate expression"); 18011c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(EvalResult.Val.isInt() && "Expression did not evaluate to integer"); 180251fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 18031c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson return EvalResult.Val.getInt(); 180451fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson} 1805