ExprConstant.cpp revision 30c37f4d2ee5811e85f692c22fb67d74ddc88079
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" 164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman#include "clang/AST/RecordLayout.h" 170fe52e1bcaa69ba127f1bda036f057fec1f478deSeo Sanghyeon#include "clang/AST/StmtVisitor.h" 18500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/AST/ASTDiagnostic.h" 1906a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson#include "clang/Basic/TargetInfo.h" 20c754aa62643e66ab967ca32ae8b0b3fc419bba25Anders Carlsson#include "llvm/Support/Compiler.h" 21c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlssonusing namespace clang; 22f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerusing llvm::APSInt; 23d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanusing llvm::APFloat; 24c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson 2587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// EvalInfo - This is a private struct used by the evaluator to capture 2687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// information about a subexpression as it is folded. It retains information 2787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// about the AST context, but also maintains information about the folded 2887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// expression. 2987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// 3087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// If an expression could be evaluated, it is still possible it is not a C 3187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// "integer constant expression" or constant expression. If not, this struct 3287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// captures information about how and why not. 3387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// 3487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// One bit of information passed *into* the request for constant folding 3587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// indicates whether the subexpression is "evaluated" or not according to C 3687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// rules. For example, the RHS of (0 && foo()) is not evaluated. We can 3787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// evaluate the expression regardless of what the RHS is, but C only allows 3887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// certain things in certain situations. 3987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstruct EvalInfo { 4087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner ASTContext &Ctx; 4187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 4254da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson /// EvalResult - Contains information about the evaluation. 4354da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Expr::EvalResult &EvalResult; 44f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson 45f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson /// ShortCircuit - will be greater than zero if the current subexpression has 46f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson /// will not be evaluated because it's short-circuited (according to C rules). 47f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson unsigned ShortCircuit; 4854da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson 4954da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson EvalInfo(ASTContext &ctx, Expr::EvalResult& evalresult) : Ctx(ctx), 50f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson EvalResult(evalresult), ShortCircuit(0) {} 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); 57d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr *E, APFloat &Result, EvalInfo &Info); 58a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbarstatic bool EvaluateComplex(const Expr *E, APValue &Result, EvalInfo &Info); 59f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 60f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 614efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// Misc utilities 624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 634efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanstatic bool HandleConversionToBool(Expr* E, bool& Result, EvalInfo &Info) { 654efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->getType()->isIntegralType()) { 664efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 674efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateInteger(E, IntResult, Info)) 684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 694efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = IntResult != 0; 704efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 714efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else if (E->getType()->isRealFloatingType()) { 724efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APFloat FloatResult(0.0); 734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateFloat(E, FloatResult, Info)) 744efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 754efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = !FloatResult.isZero(); 764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else if (E->getType()->isPointerType()) { 784efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue PointerResult; 794efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluatePointer(E, PointerResult, Info)) 804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // FIXME: Is this accurate for all kinds of bases? If not, what would 824efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // the check look like? 834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = PointerResult.getLValueBase() || PointerResult.getLValueOffset(); 844efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 864efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 90a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarstatic APSInt HandleFloatToIntCast(QualType DestType, QualType SrcType, 91a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat &Value, ASTContext &Ctx) { 92a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 93a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Determine whether we are converting to unsigned or signed. 94a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool DestSigned = DestType->isSignedIntegerType(); 95a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 96a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // FIXME: Warning for overflow. 97a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar uint64_t Space[4]; 98a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 99a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar (void)Value.convertToInteger(Space, DestWidth, DestSigned, 100a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar llvm::APFloat::rmTowardZero, &ignored); 101a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APSInt(llvm::APInt(DestWidth, 4, Space), !DestSigned); 102a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 103a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 104a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarstatic APFloat HandleFloatToFloatCast(QualType DestType, QualType SrcType, 105a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat &Value, ASTContext &Ctx) { 106a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 107a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result = Value; 108a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.convert(Ctx.getFloatTypeSemantics(DestType), 109a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven, &ignored); 110a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 111a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 112a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 113a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarstatic APSInt HandleIntToIntCast(QualType DestType, QualType SrcType, 114a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt &Value, ASTContext &Ctx) { 115a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 116a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt Result = Value; 117a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Figure out if this is a truncate, extend or noop cast. 118a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // If the input is signed, do a sign extend, noop, or truncate. 119a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.extOrTrunc(DestWidth); 120a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.setIsUnsigned(DestType->isUnsignedIntegerType()); 121a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 122a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 123a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 124a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarstatic APFloat HandleIntToFloatCast(QualType DestType, QualType SrcType, 125a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt &Value, ASTContext &Ctx) { 126a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 127a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result(Ctx.getFloatTypeSemantics(DestType), 1); 128a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.convertFromAPInt(Value, Value.isSigned(), 129a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven); 130a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 131a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 132a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1334efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 1344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// LValue Evaluation 1354efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 1364efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmannamespace { 1374efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanclass VISIBILITY_HIDDEN LValueExprEvaluator 1384efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman : public StmtVisitor<LValueExprEvaluator, APValue> { 1394efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman EvalInfo &Info; 1404efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanpublic: 1414efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1424efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman LValueExprEvaluator(EvalInfo &info) : Info(info) {} 1434efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1444efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitStmt(Stmt *S) { 1458a7b7c6d4c96ace3667204bed4a48bad91b7c0f0Daniel Dunbar#if 0 1464efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // FIXME: Remove this when we support more expressions. 1474efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman printf("Unhandled pointer statement\n"); 1484efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman S->dump(); 1498a7b7c6d4c96ace3667204bed4a48bad91b7c0f0Daniel Dunbar#endif 1504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 1514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 1524efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1534efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 15435873c49adad211ff466e34342a52665742794f5Anders Carlsson APValue VisitDeclRefExpr(DeclRefExpr *E); 1554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitPredefinedExpr(PredefinedExpr *E) { return APValue(E, 0); } 1564efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitCompoundLiteralExpr(CompoundLiteralExpr *E); 1574efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitMemberExpr(MemberExpr *E); 1584efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitStringLiteral(StringLiteral *E) { return APValue(E, 0); } 1593068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue VisitArraySubscriptExpr(ArraySubscriptExpr *E); 1604efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman}; 1614efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} // end anonymous namespace 1624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1634efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanstatic bool EvaluateLValue(const Expr* E, APValue& Result, EvalInfo &Info) { 1644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = LValueExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 1654efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result.isLValue(); 1664efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 1674efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 16835873c49adad211ff466e34342a52665742794f5Anders CarlssonAPValue LValueExprEvaluator::VisitDeclRefExpr(DeclRefExpr *E) 16935873c49adad211ff466e34342a52665742794f5Anders Carlsson{ 17035873c49adad211ff466e34342a52665742794f5Anders Carlsson if (!E->hasGlobalStorage()) 17135873c49adad211ff466e34342a52665742794f5Anders Carlsson return APValue(); 17235873c49adad211ff466e34342a52665742794f5Anders Carlsson 17335873c49adad211ff466e34342a52665742794f5Anders Carlsson return APValue(E, 0); 17435873c49adad211ff466e34342a52665742794f5Anders Carlsson} 17535873c49adad211ff466e34342a52665742794f5Anders Carlsson 1764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue LValueExprEvaluator::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 1774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->isFileScope()) 1784efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(E, 0); 1794efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 1804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 1814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1824efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue LValueExprEvaluator::VisitMemberExpr(MemberExpr *E) { 1834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue result; 1844efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman QualType Ty; 1854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->isArrow()) { 1864efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluatePointer(E->getBase(), result, Info)) 1874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 1884efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Ty = E->getBase()->getType()->getAsPointerType()->getPointeeType(); 1894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else { 1904efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result = Visit(E->getBase()); 1914efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (result.isUninit()) 1924efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 1934efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Ty = E->getBase()->getType(); 1944efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 1954efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1964efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman RecordDecl *RD = Ty->getAsRecordType()->getDecl(); 1974efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 19886f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 19986f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor FieldDecl *FD = dyn_cast<FieldDecl>(E->getMemberDecl()); 20086f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (!FD) // FIXME: deal with other kinds of member expressions 20186f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return APValue(); 2024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2034efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // FIXME: This is linear time. 20444b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor unsigned i = 0; 20544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor for (RecordDecl::field_iterator Field = RD->field_begin(), 20644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldEnd = RD->field_end(); 20744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; (void)++Field, ++i) { 20844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (*Field == FD) 2094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman break; 2104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2114efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result.setLValue(result.getLValueBase(), 2134efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman result.getLValueOffset() + RL.getFieldOffset(i) / 8); 2144efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return result; 2164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 2174efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2183068d117951a8df54bae9db039b56201ab10962bAnders CarlssonAPValue LValueExprEvaluator::VisitArraySubscriptExpr(ArraySubscriptExpr *E) 2193068d117951a8df54bae9db039b56201ab10962bAnders Carlsson{ 2203068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue Result; 2213068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 2223068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getBase(), Result, Info)) 2233068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return APValue(); 2243068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 2253068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APSInt Index; 2263068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluateInteger(E->getIdx(), Index, Info)) 2273068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return APValue(); 2283068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 2293068d117951a8df54bae9db039b56201ab10962bAnders Carlsson uint64_t ElementSize = Info.Ctx.getTypeSize(E->getType()) / 8; 2303068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 2313068d117951a8df54bae9db039b56201ab10962bAnders Carlsson uint64_t Offset = Index.getSExtValue() * ElementSize; 2323068d117951a8df54bae9db039b56201ab10962bAnders Carlsson Result.setLValue(Result.getLValueBase(), 2333068d117951a8df54bae9db039b56201ab10962bAnders Carlsson Result.getLValueOffset() + Offset); 2343068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return Result; 2353068d117951a8df54bae9db039b56201ab10962bAnders Carlsson} 2364efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2374efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 238f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Pointer Evaluation 239f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 240f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 241c754aa62643e66ab967ca32ae8b0b3fc419bba25Anders Carlssonnamespace { 2422bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonclass VISIBILITY_HIDDEN PointerExprEvaluator 2432bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson : public StmtVisitor<PointerExprEvaluator, APValue> { 24487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 2452bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonpublic: 2462bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 24787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner PointerExprEvaluator(EvalInfo &info) : Info(info) {} 248f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 2492bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson APValue VisitStmt(Stmt *S) { 2502bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson return APValue(); 2512bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 2522bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 2532bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 2542bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 255650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue VisitBinaryOperator(const BinaryOperator *E); 256650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue VisitCastExpr(const CastExpr* E); 2574efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitUnaryOperator(const UnaryOperator *E); 2584efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitObjCStringLiteral(ObjCStringLiteral *E) 2594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman { return APValue(E, 0); } 260f01158941ba4560c63150032073bb231ce38999eEli Friedman APValue VisitAddrLabelExpr(AddrLabelExpr *E) 261f01158941ba4560c63150032073bb231ce38999eEli Friedman { return APValue(E, 0); } 2623941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman APValue VisitCallExpr(CallExpr *E); 263bd65cac8de63d108a681035782a71d42954b03abMike Stump APValue VisitBlockExpr(BlockExpr *E) { return APValue(E, 0); } 2644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitConditionalOperator(ConditionalOperator *E); 2652bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson}; 266f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 2672bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 26887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluatePointer(const Expr* E, APValue& Result, EvalInfo &Info) { 269ca2f3fdeedc4e4beea4f7572d6d975188d0bb5efMike Stump if (!E->getType()->isPointerType() 270ca2f3fdeedc4e4beea4f7572d6d975188d0bb5efMike Stump && !E->getType()->isBlockPointerType()) 271f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return false; 27287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner Result = PointerExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 273f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return Result.isLValue(); 274f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 275650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 276f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris LattnerAPValue PointerExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 277650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() != BinaryOperator::Add && 278650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson E->getOpcode() != BinaryOperator::Sub) 279650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 280650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 281650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *PExp = E->getLHS(); 282650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *IExp = E->getRHS(); 283650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (IExp->getType()->isPointerType()) 284f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner std::swap(PExp, IExp); 285650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 286650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue ResultLValue; 28787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(PExp, ResultLValue, Info)) 288650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 289f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 290650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson llvm::APSInt AdditionalOffset(32); 29187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluateInteger(IExp, AdditionalOffset, Info)) 292650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 293650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 2944efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman QualType PointeeType = PExp->getType()->getAsPointerType()->getPointeeType(); 2954d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson uint64_t SizeOfPointee; 2964d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson 2974d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson // Explicitly handle GNU void* and function pointer arithmetic extensions. 2984d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson if (PointeeType->isVoidType() || PointeeType->isFunctionType()) 2994d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson SizeOfPointee = 1; 3004d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson else 3014d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson SizeOfPointee = Info.Ctx.getTypeSize(PointeeType) / 8; 3024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 303650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson uint64_t Offset = ResultLValue.getLValueOffset(); 3044efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 305650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() == BinaryOperator::Add) 3064efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Offset += AdditionalOffset.getLimitedValue() * SizeOfPointee; 307650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson else 3084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Offset -= AdditionalOffset.getLimitedValue() * SizeOfPointee; 3094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 310650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(ResultLValue.getLValueBase(), Offset); 311650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 3124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3134efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue PointerExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 3144efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->getOpcode() == UnaryOperator::Extension) { 3154efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // FIXME: Deal with warnings? 3164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Visit(E->getSubExpr()); 3174efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->getOpcode() == UnaryOperator::AddrOf) { 3204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue result; 3214efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluateLValue(E->getSubExpr(), result, Info)) 3224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return result; 3234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3244efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 3264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 327d407a7619904c81d38b41a9ee850de413105084bAnders Carlsson 328650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 329b542afe02d317411d53b3541946f9f2a8f509a11Chris LattnerAPValue PointerExprEvaluator::VisitCastExpr(const CastExpr* E) { 330650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr* SubExpr = E->getSubExpr(); 331650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 332650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson // Check for pointer->pointer cast 333650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (SubExpr->getType()->isPointerType()) { 334650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue Result; 33587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (EvaluatePointer(SubExpr, Result, Info)) 336650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return Result; 337f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return APValue(); 338650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 339650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 340d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman if (SubExpr->getType()->isIntegralType()) { 341650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson llvm::APSInt Result(32); 34287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (EvaluateInteger(SubExpr, Result, Info)) { 34387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner Result.extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 344650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(0, Result.getZExtValue()); 345650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 346650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 3474efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3484efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isFunctionType() || 3494efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman SubExpr->getType()->isArrayType()) { 3504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue Result; 3514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluateLValue(SubExpr, Result, Info)) 3524efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result; 3534efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 3544efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3564efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman //assert(0 && "Unhandled cast"); 357650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 358650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 359650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 3603941b18b8e441c8c466efecd557de60b9a32d10bEli FriedmanAPValue PointerExprEvaluator::VisitCallExpr(CallExpr *E) { 3613c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor if (E->isBuiltinCall(Info.Ctx) == 3623c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor Builtin::BI__builtin___CFStringMakeConstantString) 3633941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman return APValue(E, 0); 3643941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman return APValue(); 3653941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman} 3663941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman 3674efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue PointerExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 3684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 3694efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 3704efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 3714efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3724efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 3734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3744efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue Result; 3754efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluatePointer(EvalExpr, Result, Info)) 3764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result; 3774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 3784efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 379f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 380f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 38159b5da6d853b4368b984700315adf7b37de05764Nate Begeman// Vector Evaluation 38259b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 38359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 38459b5da6d853b4368b984700315adf7b37de05764Nate Begemannamespace { 38559b5da6d853b4368b984700315adf7b37de05764Nate Begeman class VISIBILITY_HIDDEN VectorExprEvaluator 38659b5da6d853b4368b984700315adf7b37de05764Nate Begeman : public StmtVisitor<VectorExprEvaluator, APValue> { 38759b5da6d853b4368b984700315adf7b37de05764Nate Begeman EvalInfo &Info; 38859b5da6d853b4368b984700315adf7b37de05764Nate Begeman public: 38959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 39059b5da6d853b4368b984700315adf7b37de05764Nate Begeman VectorExprEvaluator(EvalInfo &info) : Info(info) {} 39159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 39259b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitStmt(Stmt *S) { 39359b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 39459b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 39559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 39659b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 39759b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCastExpr(const CastExpr* E); 39859b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 39959b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitInitListExpr(const InitListExpr *E); 40059b5da6d853b4368b984700315adf7b37de05764Nate Begeman }; 40159b5da6d853b4368b984700315adf7b37de05764Nate Begeman} // end anonymous namespace 40259b5da6d853b4368b984700315adf7b37de05764Nate Begeman 40359b5da6d853b4368b984700315adf7b37de05764Nate Begemanstatic bool EvaluateVector(const Expr* E, APValue& Result, EvalInfo &Info) { 40459b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!E->getType()->isVectorType()) 40559b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 40659b5da6d853b4368b984700315adf7b37de05764Nate Begeman Result = VectorExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 40759b5da6d853b4368b984700315adf7b37de05764Nate Begeman return !Result.isUninit(); 40859b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 40959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 41059b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue VectorExprEvaluator::VisitCastExpr(const CastExpr* E) { 41159b5da6d853b4368b984700315adf7b37de05764Nate Begeman const Expr* SE = E->getSubExpr(); 41259b5da6d853b4368b984700315adf7b37de05764Nate Begeman 41359b5da6d853b4368b984700315adf7b37de05764Nate Begeman // Check for vector->vector bitcast. 41459b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (SE->getType()->isVectorType()) 41559b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(SE)); 41659b5da6d853b4368b984700315adf7b37de05764Nate Begeman 41759b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 41859b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 41959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 42059b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue 42159b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 42259b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(E->getInitializer())); 42359b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 42459b5da6d853b4368b984700315adf7b37de05764Nate Begeman 42559b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue 42659b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 42759b5da6d853b4368b984700315adf7b37de05764Nate Begeman const VectorType *VT = E->getType()->getAsVectorType(); 42859b5da6d853b4368b984700315adf7b37de05764Nate Begeman unsigned NumInits = E->getNumInits(); 42959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 43059b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!VT || VT->getNumElements() != NumInits) 43159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 43259b5da6d853b4368b984700315adf7b37de05764Nate Begeman 43359b5da6d853b4368b984700315adf7b37de05764Nate Begeman QualType EltTy = VT->getElementType(); 43459b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::SmallVector<APValue, 4> Elements; 43559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 43659b5da6d853b4368b984700315adf7b37de05764Nate Begeman for (unsigned i = 0; i < NumInits; i++) { 43759b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (EltTy->isIntegerType()) { 43859b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APSInt sInt(32); 43959b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!EvaluateInteger(E->getInit(i), sInt, Info)) 44059b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 44159b5da6d853b4368b984700315adf7b37de05764Nate Begeman Elements.push_back(APValue(sInt)); 44259b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else { 44359b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APFloat f(0.0); 44459b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!EvaluateFloat(E->getInit(i), f, Info)) 44559b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 44659b5da6d853b4368b984700315adf7b37de05764Nate Begeman Elements.push_back(APValue(f)); 44759b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 44859b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 44959b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(&Elements[0], Elements.size()); 45059b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 45159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 45259b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 453f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Integer Evaluation 454f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 455f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 456f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnernamespace { 457f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerclass VISIBILITY_HIDDEN IntExprEvaluator 458b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner : public StmtVisitor<IntExprEvaluator, bool> { 45987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 46030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue &Result; 461f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerpublic: 46230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar IntExprEvaluator(EvalInfo &info, APValue &result) 46387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner : Info(info), Result(result) {} 464f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 46582206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Extension(SourceLocation L, diag::kind D, const Expr *E) { 46654da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.DiagLoc = L; 46754da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.Diag = D; 46882206e267ce6cc709797127616f64672d255b310Anders Carlsson Info.EvalResult.DiagExpr = E; 46954176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return true; // still a constant. 47054176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner } 471131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 4723f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar bool Success(const llvm::APSInt &SI, const Expr *E) { 47330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.isSigned() == E->getType()->isSignedIntegerType() && 4743f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 47530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 4763f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 47730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(SI); 4783f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 4793f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 4803f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 481131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(const llvm::APInt &I, const Expr *E) { 48230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(I.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 4833f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 48430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(APSInt(I)); 48530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt().setIsUnsigned(E->getType()->isUnsignedIntegerType()); 486131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 487131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 488131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 489131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(uint64_t Value, const Expr *E) { 49030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(Info.Ctx.MakeIntValue(Value, E->getType())); 491131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 492131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 493131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 49482206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Error(SourceLocation L, diag::kind D, const Expr *E) { 49554176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner // If this is in an unevaluated portion of the subexpression, ignore the 49654176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner // error. 497f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson if (Info.ShortCircuit) { 49832fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // If error is ignored because the value isn't evaluated, get the real 49932fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // type at least to prevent errors downstream. 500131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 50132fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 50254176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 50332fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // Take the first error. 50430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 50530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar // FIXME: This is wrong if we happen to have already emitted an 50630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar // extension diagnostic; in that case we should report this error. 50754da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson if (Info.EvalResult.Diag == 0) { 50854da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.DiagLoc = L; 50954da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.Diag = D; 51082206e267ce6cc709797127616f64672d255b310Anders Carlsson Info.EvalResult.DiagExpr = E; 51132fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 51254176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return false; 5137a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner } 5147a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner 515f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 516f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner // Visitor Methods 517f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 51832fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner 51932fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitStmt(Stmt *) { 52032fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner assert(0 && "This should be called on integers, stmts are not integers"); 52132fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner return false; 52232fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 5237a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner 52432fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitExpr(Expr *E) { 5250e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 526f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner } 527f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 528b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 529f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 5304c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitIntegerLiteral(const IntegerLiteral *E) { 531131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 5324c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 5334c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCharacterLiteral(const CharacterLiteral *E) { 534131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 5354c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 5364c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitTypesCompatibleExpr(const TypesCompatibleExpr *E) { 537ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // Per gcc docs "this built-in function ignores top level 538ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // qualifiers". We need to use the canonical version to properly 539ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // be able to strip CRV qualifiers from the type. 540ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T0 = Info.Ctx.getCanonicalType(E->getArgType1()); 541ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T1 = Info.Ctx.getCanonicalType(E->getArgType2()); 542131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(Info.Ctx.typesAreCompatible(T0.getUnqualifiedType(), 543131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar T1.getUnqualifiedType()), 544131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 5454c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 5464c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitDeclRefExpr(const DeclRefExpr *E); 5474c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCallExpr(const CallExpr *E); 548b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitBinaryOperator(const BinaryOperator *E); 549b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitUnaryOperator(const UnaryOperator *E); 550ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes bool VisitConditionalOperator(const ConditionalOperator *E); 551f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 552a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool VisitCastExpr(CastExpr* E); 5530518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl bool VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E); 5540518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 5553068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 556131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 5573068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 5583068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 5593f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson bool VisitGNUNullExpr(const GNUNullExpr *E) { 560131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 5613f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson } 5623f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson 5633068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXZeroInitValueExpr(const CXXZeroInitValueExpr *E) { 564131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 5653068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 5663068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 56764b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) { 568131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->EvaluateTrait(), E); 56964b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl } 57064b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl 571fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattnerprivate: 572af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner unsigned GetAlignOfExpr(const Expr *E); 573af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner unsigned GetAlignOfType(QualType T); 574f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner}; 575f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 576f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 57787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluateInteger(const Expr* E, APSInt &Result, EvalInfo &Info) { 5783f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!E->getType()->isIntegralType()) 5793f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return false; 58030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 58130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue Val; 58230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!IntExprEvaluator(Info, Val).Visit(const_cast<Expr*>(E)) || 58330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar !Val.isInt()) 58430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 58530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 58630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = Val.getInt(); 58730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return true; 588f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 589f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 5904c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattnerbool IntExprEvaluator::VisitDeclRefExpr(const DeclRefExpr *E) { 5914c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Enums are integer constant exprs. 5924c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner if (const EnumConstantDecl *D = dyn_cast<EnumConstantDecl>(E->getDecl())) { 593e9a0f43927041e2bcc89140c338dfae207ad3c3bEli Friedman // FIXME: This is an ugly hack around the fact that enums don't set their 5943f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // signedness consistently; see PR3173. 5953f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar APSInt SI = D->getInitVal(); 5963f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar SI.setIsUnsigned(!E->getType()->isSignedIntegerType()); 5973f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // FIXME: This is an ugly hack around the fact that enums don't 5983f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // set their width (!?!) consistently; see PR3173. 5993f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar SI.extOrTrunc(Info.Ctx.getIntWidth(E->getType())); 6003f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(SI, E); 6014c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 602b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 603b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl // In C++, const, non-volatile integers initialized with ICEs are ICEs. 604b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl if (Info.Ctx.getLangOptions().CPlusPlus && 605b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl E->getType().getCVRQualifiers() == QualType::Const) { 606b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl if (const VarDecl *D = dyn_cast<VarDecl>(E->getDecl())) { 607b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl if (const Expr *Init = D->getInit()) 608b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl return Visit(const_cast<Expr*>(Init)); 609b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 610b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 611b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 6124c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Otherwise, random variable references are not constants. 6130e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 6144c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 6154c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner 616a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way 617a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// as GCC. 618a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattnerstatic int EvaluateBuiltinClassifyType(const CallExpr *E) { 619a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // The following enum mimics the values returned by GCC. 620a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enum gcc_type_class { 621a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner no_type_class = -1, 622a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner void_type_class, integer_type_class, char_type_class, 623a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enumeral_type_class, boolean_type_class, 624a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner pointer_type_class, reference_type_class, offset_type_class, 625a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner real_type_class, complex_type_class, 626a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner function_type_class, method_type_class, 627a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner record_type_class, union_type_class, 628a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner array_type_class, string_type_class, 629a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner lang_type_class 630a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner }; 631a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 632a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // If no argument was supplied, default to "no_type_class". This isn't 633a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // ideal, however it is what gcc does. 634a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (E->getNumArgs() == 0) 635a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return no_type_class; 636a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 637a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner QualType ArgTy = E->getArg(0)->getType(); 638a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (ArgTy->isVoidType()) 639a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return void_type_class; 640a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isEnumeralType()) 641a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return enumeral_type_class; 642a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isBooleanType()) 643a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return boolean_type_class; 644a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isCharType()) 645a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return string_type_class; // gcc doesn't appear to use char_type_class 646a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isIntegerType()) 647a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return integer_type_class; 648a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isPointerType()) 649a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return pointer_type_class; 650a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isReferenceType()) 651a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return reference_type_class; 652a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isRealType()) 653a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return real_type_class; 654a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isComplexType()) 655a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return complex_type_class; 656a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isFunctionType()) 657a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return function_type_class; 658a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isStructureType()) 659a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return record_type_class; 660a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 661a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 662a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isArrayType()) 663a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return array_type_class; 664a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 665a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 666a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else // FIXME: offset_type_class, method_type_class, & lang_type_class? 667a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner assert(0 && "CallExpr::isBuiltinClassifyType(): unimplemented type"); 668a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return -1; 669a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner} 670a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 6714c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattnerbool IntExprEvaluator::VisitCallExpr(const CallExpr *E) { 6723c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 673019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner default: 6740e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 675019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_classify_type: 676131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(EvaluateBuiltinClassifyType(E), E); 677019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 6784bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson case Builtin::BI__builtin_constant_p: 679019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // __builtin_constant_p always has one operand: it returns true if that 680019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // operand can be folded, false otherwise. 681131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getArg(0)->isEvaluatable(Info.Ctx), E); 682019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 6834c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 684f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 685b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 686a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == BinaryOperator::Comma) { 687027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson if (!Visit(E->getRHS())) 688027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return false; 6894fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson 6904fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson if (!Info.ShortCircuit) { 6914fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson // If we can't evaluate the LHS, it must be because it has 6924fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson // side effects. 6934fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson if (!E->getLHS()->isEvaluatable(Info.Ctx)) 6944fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson Info.EvalResult.HasSideEffects = true; 6954fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson 6960e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Extension(E->getOperatorLoc(), diag::note_comma_in_ice, E); 6974fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson } 698c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner 699027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return true; 700a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 701a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 702a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->isLogicalOp()) { 703a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // These need to be handled specially because the operands aren't 704a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // necessarily integral 705fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool lhsResult, rhsResult; 70651fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 707fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getLHS(), lhsResult, Info)) { 70851fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // We were able to evaluate the LHS, see if we can get away with not 70951fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // evaluating the RHS: 0 && X -> 0, 1 || X -> 1 710fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (lhsResult == (E->getOpcode() == BinaryOperator::LOr) || 711fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson !lhsResult == (E->getOpcode() == BinaryOperator::LAnd)) { 712f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson Info.ShortCircuit++; 713fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool rhsEvaluated = HandleConversionToBool(E->getRHS(), rhsResult, Info); 714f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson Info.ShortCircuit--; 715f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson 716fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // FIXME: Return an extension warning saying that the RHS could not be 717fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // evaluated. 7183f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // if (!rhsEvaluated) ... 7193f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar (void) rhsEvaluated; 7203f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 7213f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(lhsResult, E); 722a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 723a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 724fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 7254bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson if (E->getOpcode() == BinaryOperator::LOr) 726131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult || rhsResult, E); 7274bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson else 728131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult && rhsResult, E); 7294bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 7304bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } else { 731fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 7324bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // We can't evaluate the LHS; however, sometimes the result 7334bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // is determined by the RHS: X && 0 -> 0, X || 1 -> 1. 734fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (rhsResult == (E->getOpcode() == BinaryOperator::LOr) || 735fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson !rhsResult == (E->getOpcode() == BinaryOperator::LAnd)) { 736131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // Since we weren't able to evaluate the left hand side, it 737fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // must have had side effects. 738fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson Info.EvalResult.HasSideEffects = true; 739131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 740131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(rhsResult, E); 7414bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 7424bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 743a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 744a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 745a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 746c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner } 74754176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 748286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType LHSTy = E->getLHS()->getType(); 749286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType RHSTy = E->getRHS()->getType(); 7504087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 7514087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHSTy->isAnyComplexType()) { 7524087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar assert(RHSTy->isAnyComplexType() && "Invalid comparison"); 7534087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar APValue LHS, RHS; 7544087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 7554087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getLHS(), LHS, Info)) 7564087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 7574087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 7584087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 7594087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 7604087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 7614087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHS.isComplexFloat()) { 7624087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar APFloat::cmpResult CR_r = 7634087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatReal().compare(RHS.getComplexFloatReal()); 7644087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar APFloat::cmpResult CR_i = 7654087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatImag().compare(RHS.getComplexFloatImag()); 7664087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 7674087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 768131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((CR_r == APFloat::cmpEqual && 769131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpEqual), E); 770131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 771131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 772131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid complex comparison."); 773131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(((CR_r == APFloat::cmpGreaterThan || 774131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_r == APFloat::cmpLessThan) && 775131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar (CR_i == APFloat::cmpGreaterThan || 776131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpLessThan)), E); 777131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 7784087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } else { 7794087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 780131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() == RHS.getComplexIntReal() && 781131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() == RHS.getComplexIntImag()), E); 782131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 783131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 784131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid compex comparison."); 785131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() != RHS.getComplexIntReal() || 786131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() != RHS.getComplexIntImag()), E); 787131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 7884087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 7894087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 790286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson 791286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (LHSTy->isRealFloatingType() && 792286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson RHSTy->isRealFloatingType()) { 793286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat RHS(0.0), LHS(0.0); 794286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson 795286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getRHS(), RHS, Info)) 796286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 797286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson 798286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getLHS(), LHS, Info)) 799286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 800286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson 801286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat::cmpResult CR = LHS.compare(RHS); 802529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson 803286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson switch (E->getOpcode()) { 804286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson default: 805286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson assert(0 && "Invalid binary operator!"); 806286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LT: 807131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan, E); 808286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GT: 809131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan, E); 810286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LE: 811131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan || CR == APFloat::cmpEqual, E); 812286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GE: 813131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan || CR == APFloat::cmpEqual, 814131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 815286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::EQ: 816131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpEqual, E); 817286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::NE: 818131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan 819131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar || CR == APFloat::cmpLessThan, E); 820286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 821286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 822286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson 8233068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (E->getOpcode() == BinaryOperator::Sub) { 824529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson if (LHSTy->isPointerType() && RHSTy->isPointerType()) { 8253068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue LHSValue; 8263068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getLHS(), LHSValue, Info)) 8273068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 8283068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 8293068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue RHSValue; 8303068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getRHS(), RHSValue, Info)) 8313068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 8323068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 8333068d117951a8df54bae9db039b56201ab10962bAnders Carlsson // FIXME: Is this correct? What if only one of the operands has a base? 8343068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (LHSValue.getLValueBase() || RHSValue.getLValueBase()) 8353068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 8363068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 8373068d117951a8df54bae9db039b56201ab10962bAnders Carlsson const QualType Type = E->getLHS()->getType(); 8383068d117951a8df54bae9db039b56201ab10962bAnders Carlsson const QualType ElementType = Type->getAsPointerType()->getPointeeType(); 8393068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 8403068d117951a8df54bae9db039b56201ab10962bAnders Carlsson uint64_t D = LHSValue.getLValueOffset() - RHSValue.getLValueOffset(); 8413068d117951a8df54bae9db039b56201ab10962bAnders Carlsson D /= Info.Ctx.getTypeSize(ElementType) / 8; 8423068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 843131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(D, E); 8443068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 8453068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 846286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!LHSTy->isIntegralType() || 847286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson !RHSTy->isIntegralType()) { 848a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // We can't continue from here for non-integral types, and they 849a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // could potentially confuse the following operations. 850a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // FIXME: Deal with EQ and friends. 851a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 852a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 853a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 854a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // The LHS of a constant expr is always evaluated and needed. 85530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Visit(E->getLHS())) 856a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; // error in subexpression. 857d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman 85830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar // Only support arithmetic on integers for now. 85930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) 86030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 86130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 862131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar llvm::APSInt RHS; 86354176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (!EvaluateInteger(E->getRHS(), RHS, Info)) 864b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 865a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 866a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson switch (E->getOpcode()) { 86732fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner default: 8680e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 86930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Mul: return Success(Result.getInt() * RHS, E); 87030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Add: return Success(Result.getInt() + RHS, E); 87130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Sub: return Success(Result.getInt() - RHS, E); 87230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::And: return Success(Result.getInt() & RHS, E); 87330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Xor: return Success(Result.getInt() ^ RHS, E); 87430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Or: return Success(Result.getInt() | RHS, E); 875a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Div: 87654176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 8770e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 87830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() / RHS, E); 879a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Rem: 88054176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 8810e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 88230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() % RHS, E); 8833f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shl: { 88454176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner // FIXME: Warn about out of range shift amounts! 88530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar unsigned SA = 88630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 88730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() << SA, E); 8883f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 8893f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shr: { 89030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar unsigned SA = 89130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 89230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() >> SA, E); 8933f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 894b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner 89530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LT: return Success(Result.getInt() < RHS, E); 89630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GT: return Success(Result.getInt() > RHS, E); 89730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LE: return Success(Result.getInt() <= RHS, E); 89830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GE: return Success(Result.getInt() >= RHS, E); 89930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::EQ: return Success(Result.getInt() == RHS, E); 90030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::NE: return Success(Result.getInt() != RHS, E); 901b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 902a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 903a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 904ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopesbool IntExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 905a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes bool Cond; 906a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes if (!HandleConversionToBool(E->getCond(), Cond, Info)) 907ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes return false; 908ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 909a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 910ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes} 911ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 912af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattnerunsigned IntExprEvaluator::GetAlignOfType(QualType T) { 913e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner const Type *Ty = Info.Ctx.getCanonicalType(T).getTypePtr(); 914e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 915e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // __alignof__(void) = 1 as a gcc extension. 916e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (Ty->isVoidType()) 917e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return 1; 918e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 919e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // GCC extension: alignof(function) = 4. 920e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // FIXME: AlignOf shouldn't be unconditionally 4! It should listen to the 921e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // attribute(align) directive. 922e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (Ty->isFunctionType()) 923e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return 4; 924e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 925f11284ac87daa613bc7b30db9f54bd716d123222Fariborz Jahanian if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(Ty)) 926f11284ac87daa613bc7b30db9f54bd716d123222Fariborz Jahanian return GetAlignOfType(QualType(EXTQT->getBaseType(), 0)); 927e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 928e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // alignof VLA/incomplete array. 929e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (const ArrayType *VAT = dyn_cast<ArrayType>(Ty)) 930e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(VAT->getElementType()); 931e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 932e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // sizeof (objc class)? 933e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (isa<ObjCInterfaceType>(Ty)) 934e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return 1; // FIXME: This probably isn't right. 935e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 936e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the alignment. 937e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner unsigned CharSize = Info.Ctx.Target.getCharWidth(); 938e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return Info.Ctx.getTypeAlign(Ty) / CharSize; 939e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 940e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 941af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattnerunsigned IntExprEvaluator::GetAlignOfExpr(const Expr *E) { 942af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner E = E->IgnoreParens(); 943af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 944af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // alignof decl is always accepted, even if it doesn't make sense: we default 945af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // to 1 in those cases. 946af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 947b7d0844c887a72064b624dc6df12cbe1441f69d0Daniel Dunbar return Info.Ctx.getDeclAlignInBytes(DRE->getDecl()); 948af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 949af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) 950b7d0844c887a72064b624dc6df12cbe1441f69d0Daniel Dunbar return Info.Ctx.getDeclAlignInBytes(ME->getMemberDecl()); 951af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 952e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(E->getType()); 953e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 954e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 955e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 9560518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// VisitSizeAlignOfExpr - Evaluate a sizeof or alignof with a result as the 9570518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// expression's type. 9580518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redlbool IntExprEvaluator::VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E) { 9590518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType DstTy = E->getType(); 960fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 961e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Handle alignof separately. 962e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!E->isSizeOf()) { 963e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (E->isArgumentType()) 964131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(GetAlignOfType(E->getArgumentType()), E); 965e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner else 966131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(GetAlignOfExpr(E->getArgumentExpr()), E); 967e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner } 968e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 9690518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType SrcTy = E->getTypeOfArgument(); 9700518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 971131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc 972131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // extension. 973131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar if (SrcTy->isVoidType() || SrcTy->isFunctionType()) 974131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(1, E); 975fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 976fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. 977e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!SrcTy->isConstantSizeType()) 978fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner return false; 979f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 980f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman if (SrcTy->isObjCInterfaceType()) { 981f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman // Slightly unusual case: the size of an ObjC interface type is the 982f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman // size of the class. This code intentionally falls through to the normal 983f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman // case. 984f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman ObjCInterfaceDecl *OI = SrcTy->getAsObjCInterfaceType()->getDecl(); 985f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman RecordDecl *RD = const_cast<RecordDecl*>(Info.Ctx.addRecordToClass(OI)); 986f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman SrcTy = Info.Ctx.getTagDeclType(static_cast<TagDecl*>(RD)); 987f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman } 988f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 989e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the size. 99087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner unsigned CharSize = Info.Ctx.Target.getCharWidth(); 991131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(Info.Ctx.getTypeSize(SrcTy) / CharSize, E); 992fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner} 993fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 994b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 9954c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Special case unary operators that do not need their subexpression 9964c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // evaluated. offsetof/sizeof/alignof are all special. 997131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar if (E->isOffsetOfOp()) 998131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->evaluateOffsetOf(Info.Ctx), E); 999a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1000a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == UnaryOperator::LNot) { 1001a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // LNot's operand isn't necessarily an integer, so we handle it specially. 1002a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman bool bres; 1003a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!HandleConversionToBool(E->getSubExpr(), bres, Info)) 1004a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1005131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(!bres, E); 1006a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1007a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 100887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner // Get the operand value into 'Result'. 100987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!Visit(E->getSubExpr())) 101075a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner return false; 1011a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 101275a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner switch (E->getOpcode()) { 10134c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner default: 101475a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 101575a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // See C99 6.6p3. 10160e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 101775a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Extension: 10184c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // FIXME: Should extension allow i-c-e extension expressions in its scope? 10194c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // If so, we could clear the diagnostic ID. 10203f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 102175a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Plus: 10224c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // The result is always just the subexpr. 10233f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 102475a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Minus: 102530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 102630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(-Result.getInt(), E); 102775a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Not: 102830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 102930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(~Result.getInt(), E); 103006a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson } 1031a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 1032a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 1033732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// HandleCast - This is used to evaluate implicit or explicit casts where the 1034732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// result type is integer. 1035a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarbool IntExprEvaluator::VisitCastExpr(CastExpr *E) { 103682206e267ce6cc709797127616f64672d255b310Anders Carlsson Expr *SubExpr = E->getSubExpr(); 103782206e267ce6cc709797127616f64672d255b310Anders Carlsson QualType DestType = E->getType(); 103882206e267ce6cc709797127616f64672d255b310Anders Carlsson 10394efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (DestType->isBooleanType()) { 10404efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 10414efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(SubExpr, BoolResult, Info)) 10424efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1043131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(BoolResult, E); 10444efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 10454efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1046a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson // Handle simple integer->integer casts. 1047a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (SubExpr->getType()->isIntegralType()) { 1048732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!Visit(SubExpr)) 1049b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1050a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 105130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar // FIXME: Support cast on LValue results. 105230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) 105330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 105430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 10553f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(HandleIntToIntCast(DestType, SubExpr->getType(), 105630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt(), Info.Ctx), E); 1057732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner } 1058732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 1059732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner // FIXME: Clean this up! 1060732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (SubExpr->getType()->isPointerType()) { 1061a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson APValue LV; 106287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(SubExpr, LV, Info)) 1063b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 10644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1065a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson if (LV.getLValueBase()) 1066b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 10674efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1068131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(LV.getLValueOffset(), E); 10692bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 10704efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1071732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!SubExpr->getType()->isRealFloatingType()) 10720e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1073732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 1074d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat F(0.0); 1075d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(SubExpr, F, Info)) 10760e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1077732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 10783f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(HandleFloatToIntCast(DestType, SubExpr->getType(), 10793f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar F, Info.Ctx), E); 1080a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 10812bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 1082f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1083d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman// Float Evaluation 1084d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1085d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1086d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmannamespace { 1087d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanclass VISIBILITY_HIDDEN FloatExprEvaluator 1088d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : public StmtVisitor<FloatExprEvaluator, bool> { 1089d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman EvalInfo &Info; 1090d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat &Result; 1091d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanpublic: 1092d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman FloatExprEvaluator(EvalInfo &info, APFloat &result) 1093d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : Info(info), Result(result) {} 1094d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1095d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitStmt(Stmt *S) { 1096d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1097d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1098d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1099d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 1100019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner bool VisitCallExpr(const CallExpr *E); 1101d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 11025db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar bool VisitUnaryOperator(const UnaryOperator *E); 1103d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 1104d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitFloatingLiteral(const FloatingLiteral *E); 11054efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCastExpr(CastExpr *E); 11064efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E); 1107d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman}; 1108d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} // end anonymous namespace 1109d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1110d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) { 1111d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return FloatExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 1112d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1113d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1114019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattnerbool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) { 11153c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 111634a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner default: return false; 1117019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_val: 1118019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_valf: 1119019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_vall: 1120019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inf: 1121019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inff: 11227cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar case Builtin::BI__builtin_infl: { 11237cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 11247cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 112534a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner Result = llvm::APFloat::getInf(Sem); 112634a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner return true; 11277cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar } 11289e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner 11299e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nan: 11309e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanf: 11319e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanl: 11329e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // If this is __builtin_nan("") turn this into a simple nan, otherwise we 11339e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // can't constant fold it. 11349e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner if (const StringLiteral *S = 11359e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner dyn_cast<StringLiteral>(E->getArg(0)->IgnoreParenCasts())) { 11369e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner if (!S->isWide() && S->getByteLength() == 0) { // empty string. 11377cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 11387cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 11399e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner Result = llvm::APFloat::getNaN(Sem); 11409e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner return true; 11419e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner } 11429e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner } 11439e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner return false; 11445db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 11455db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabs: 11465db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsf: 11475db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsl: 11485db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info)) 11495db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 11505db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 11515db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (Result.isNegative()) 11525db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 11535db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 11545db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 11555db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysign: 11565db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignf: 11575db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignl: { 11585db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.); 11595db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info) || 11605db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar !EvaluateFloat(E->getArg(1), RHS, Info)) 11615db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 11625db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.copySign(RHS); 11635db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 11645db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 1165019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 1166019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner} 1167019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 11685db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbarbool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 1169a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes if (E->getOpcode() == UnaryOperator::Deref) 1170a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes return false; 1171a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes 11725db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getSubExpr(), Result, Info)) 11735db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 11745db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 11755db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar switch (E->getOpcode()) { 11765db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar default: return false; 11775db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case UnaryOperator::Plus: 11785db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 11795db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case UnaryOperator::Minus: 11805db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 11815db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 11825db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 11835db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar} 1184019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 1185d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 1186d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // FIXME: Diagnostics? I really don't understand how the warnings 1187d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // and errors are supposed to work. 11885db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.0); 1189d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getLHS(), Result, Info)) 1190d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1191d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1192d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1193d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1194d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman switch (E->getOpcode()) { 1195d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman default: return false; 1196d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Mul: 1197d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.multiply(RHS, APFloat::rmNearestTiesToEven); 1198d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1199d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Add: 1200d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.add(RHS, APFloat::rmNearestTiesToEven); 1201d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1202d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Sub: 1203d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.subtract(RHS, APFloat::rmNearestTiesToEven); 1204d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1205d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Div: 1206d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.divide(RHS, APFloat::rmNearestTiesToEven); 1207d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1208d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Rem: 1209d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.mod(RHS, APFloat::rmNearestTiesToEven); 1210d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1211d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1212d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1213d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1214d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) { 1215d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result = E->getValue(); 1216d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1217d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1218d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 12194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCastExpr(CastExpr *E) { 12204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* SubExpr = E->getSubExpr(); 122159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 12224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isIntegralType()) { 12234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 12243f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!EvaluateInteger(SubExpr, IntResult, Info)) 12254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1226a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleIntToFloatCast(E->getType(), SubExpr->getType(), 1227a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar IntResult, Info.Ctx); 12284efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 12294efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 12304efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isRealFloatingType()) { 12314efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!Visit(SubExpr)) 12324efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1233a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(E->getType(), SubExpr->getType(), 1234a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result, Info.Ctx); 12354efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 12364efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 12374efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 12384efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 12394efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 12404efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 12414efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) { 12424efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(E->getType())); 12434efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 12444efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 12454efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1246d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1247a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar// Complex Evaluation (for float and integer) 12489ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 12499ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12509ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonnamespace { 1251a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbarclass VISIBILITY_HIDDEN ComplexExprEvaluator 1252a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar : public StmtVisitor<ComplexExprEvaluator, APValue> { 12539ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson EvalInfo &Info; 12549ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12559ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonpublic: 1256a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar ComplexExprEvaluator(EvalInfo &info) : Info(info) {} 12579ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12589ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 12599ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson // Visitor Methods 12609ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 12619ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12629ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitStmt(Stmt *S) { 12639ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson return APValue(); 12649ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 12659ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12669ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 12679ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12689ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitImaginaryLiteral(ImaginaryLiteral *E) { 1269a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Expr* SubExpr = E->getSubExpr(); 1270a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1271a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (SubExpr->getType()->isRealFloatingType()) { 1272a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat Result(0.0); 1273a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1274a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateFloat(SubExpr, Result, Info)) 1275a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 12769ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12773f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar return APValue(APFloat(Result.getSemantics(), APFloat::fcZero, false), 1278a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result); 1279a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1280a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar assert(SubExpr->getType()->isIntegerType() && 1281a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar "Unexpected imaginary literal."); 1282a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1283a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Result; 1284a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateInteger(SubExpr, Result, Info)) 1285a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 1286a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1287a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Zero(Result.getBitWidth(), !Result.isSigned()); 1288a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Zero = 0; 1289a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(Zero, Result); 1290a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 12919ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 12929ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 1293ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue VisitCastExpr(CastExpr *E) { 1294ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson Expr* SubExpr = E->getSubExpr(); 1295a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType EltType = E->getType()->getAsComplexType()->getElementType(); 1296a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SubType = SubExpr->getType(); 1297ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1298a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (SubType->isRealFloatingType()) { 1299ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APFloat Result(0.0); 1300ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1301ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson if (!EvaluateFloat(SubExpr, Result, Info)) 1302ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1303ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1304a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Apply float conversion if necessary. 1305a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(EltType, SubType, Result, Info.Ctx); 13068f826f0e0c90b05ab04e84c29157d2e965713288Daniel Dunbar return APValue(Result, 13073f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat(Result.getSemantics(), APFloat::fcZero, false)); 1308a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else if (SubType->isIntegerType()) { 1309a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APSInt Result; 1310a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1311a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateInteger(SubExpr, Result, Info)) 1312a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 1313a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1314a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Apply integer conversion if necessary. 1315a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleIntToIntCast(EltType, SubType, Result, Info.Ctx); 1316a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Zero(Result.getBitWidth(), !Result.isSigned()); 1317a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Zero = 0; 1318a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(Result, Zero); 1319a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else if (const ComplexType *CT = SubType->getAsComplexType()) { 1320a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APValue Src; 1321a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1322a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (!EvaluateComplex(SubExpr, Src, Info)) 1323a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(); 1324a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1325a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SrcType = CT->getElementType(); 1326a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1327a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (Src.isComplexFloat()) { 1328a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 1329a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleFloatToFloatCast(EltType, SrcType, 1330a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatReal(), 1331a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 1332a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar HandleFloatToFloatCast(EltType, SrcType, 1333a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatImag(), 1334a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1335a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1336a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleFloatToIntCast(EltType, SrcType, 1337a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatReal(), 1338a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 1339a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar HandleFloatToIntCast(EltType, SrcType, 1340a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatImag(), 1341a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1342a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1343a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1344a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar assert(Src.isComplexInt() && "Invalid evaluate result."); 1345a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 1346a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleIntToFloatCast(EltType, SrcType, 1347a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntReal(), 1348a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 1349a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar HandleIntToFloatCast(EltType, SrcType, 1350a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntImag(), 1351a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1352a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1353a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleIntToIntCast(EltType, SrcType, 1354a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntReal(), 1355a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 1356a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar HandleIntToIntCast(EltType, SrcType, 1357a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntImag(), 1358a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1359a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1360a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1361ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1362ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1363ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson // FIXME: Handle more casts. 1364ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1365ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1366ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1367ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue VisitBinaryOperator(const BinaryOperator *E); 1368ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 13699ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson}; 13709ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} // end anonymous namespace 13719ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 1372a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbarstatic bool EvaluateComplex(const Expr *E, APValue &Result, EvalInfo &Info) 13739ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson{ 1374a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result = ComplexExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 1375a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar assert((!Result.isComplexFloat() || 1376a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar (&Result.getComplexFloatReal().getSemantics() == 1377a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar &Result.getComplexFloatImag().getSemantics())) && 1378a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar "Invalid complex evaluation."); 1379a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return Result.isComplexFloat() || Result.isComplexInt(); 13809ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} 13819ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 1382a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel DunbarAPValue ComplexExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) 1383ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson{ 1384ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue Result, RHS; 1385ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1386a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getLHS(), Result, Info)) 1387ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1388ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1389a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 1390ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1391a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 13923f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar assert(Result.isComplexFloat() == RHS.isComplexFloat() && 13933f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar "Invalid operands to binary operator."); 1394ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson switch (E->getOpcode()) { 1395ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson default: return APValue(); 1396ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Add: 1397a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 1398a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().add(RHS.getComplexFloatReal(), 1399a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1400a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().add(RHS.getComplexFloatImag(), 1401a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1402a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1403a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() += RHS.getComplexIntReal(); 1404a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() += RHS.getComplexIntImag(); 1405a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 14063f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 1407ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Sub: 1408a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 1409a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().subtract(RHS.getComplexFloatReal(), 1410a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1411a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().subtract(RHS.getComplexFloatImag(), 1412a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1413a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1414a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() -= RHS.getComplexIntReal(); 1415a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() -= RHS.getComplexIntImag(); 1416a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 14173f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 14183f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar case BinaryOperator::Mul: 14193f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar if (Result.isComplexFloat()) { 14203f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APValue LHS = Result; 14213f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_r = LHS.getComplexFloatReal(); 14223f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_i = LHS.getComplexFloatImag(); 14233f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_r = RHS.getComplexFloatReal(); 14243f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_i = RHS.getComplexFloatImag(); 14253f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 14263f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat Tmp = LHS_r; 14273f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 14283f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal() = Tmp; 14293f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 14303f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 14313f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal().subtract(Tmp, APFloat::rmNearestTiesToEven); 14323f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 14333f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_r; 14343f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 14353f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag() = Tmp; 14363f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 14373f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 14383f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag().add(Tmp, APFloat::rmNearestTiesToEven); 14393f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } else { 14403f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APValue LHS = Result; 14413f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexIntReal() = 14423f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntReal() - 14433f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntImag()); 14443f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexIntImag() = 14453f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntImag() + 14463f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntReal()); 14473f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } 14483f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 1449ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1450ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1451ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return Result; 1452ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson} 1453ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 14549ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 14556ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner// Top level Expr::Evaluate method. 1456f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1457f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 14586ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// Evaluate - Return true if this is a constant which we can fold using 1459019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// any crazy technique (that has nothing to do with language standards) that 1460019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// we want to. If this function returns true, it returns the folded constant 1461019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// in Result. 14625b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlssonbool Expr::Evaluate(EvalResult &Result, ASTContext &Ctx) const { 14635b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson EvalInfo Info(Ctx, Result); 146454da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson 146559b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (getType()->isVectorType()) { 146659b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!EvaluateVector(this, Result.Val, Info)) 146759b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 146859b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else if (getType()->isIntegerType()) { 146930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!IntExprEvaluator(Info, Result.Val).Visit(const_cast<Expr*>(this))) 14706dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1471ca2f3fdeedc4e4beea4f7572d6d975188d0bb5efMike Stump } else if (getType()->isPointerType() 1472ca2f3fdeedc4e4beea4f7572d6d975188d0bb5efMike Stump || getType()->isBlockPointerType()) { 14735b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson if (!EvaluatePointer(this, Result.Val, Info)) 14746dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1475d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } else if (getType()->isRealFloatingType()) { 1476d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman llvm::APFloat f(0.0); 14776dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson if (!EvaluateFloat(this, f, Info)) 14786dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 14796dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson 14805b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson Result.Val = APValue(f); 1481a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else if (getType()->isAnyComplexType()) { 1482a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(this, Result.Val, Info)) 14836dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1484a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else 14859d4c157baaada8945671dc98363a40ed00cbd824Anders Carlsson return false; 14866dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson 14875b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson return true; 14885b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson} 14895b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson 14906ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// isEvaluatable - Call Evaluate to see if this expression can be constant 149145b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner/// folded, but discard the result. 149245b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattnerbool Expr::isEvaluatable(ASTContext &Ctx) const { 14934fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson EvalResult Result; 14944fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects; 149545b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner} 149651fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 149751fe996231b1d7199f76e4005ff4c943d5deeecdAnders CarlssonAPSInt Expr::EvaluateAsInt(ASTContext &Ctx) const { 14981c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 14991c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson bool Result = Evaluate(EvalResult, Ctx); 1500f185319f25efd6094870f287030270fad26085baDaniel Dunbar Result = Result; 150151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson assert(Result && "Could not evaluate expression"); 15021c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(EvalResult.Val.isInt() && "Expression did not evaluate to integer"); 150351fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 15041c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson return EvalResult.Val.getInt(); 150551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson} 1506