ExprConstant.cpp revision b83d287bc7f47d36fb0751a481e2ef9308b37252
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); 263b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump APValue VisitBlockExpr(BlockExpr *E) { 264b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump if (!E->hasBlockDeclRefExprs()) 265b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump return APValue(E, 0); 266b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump return APValue(); 267b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump } 2684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue VisitConditionalOperator(ConditionalOperator *E); 2692bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson}; 270f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 2712bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 27287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluatePointer(const Expr* E, APValue& Result, EvalInfo &Info) { 273ca2f3fdeedc4e4beea4f7572d6d975188d0bb5efMike Stump if (!E->getType()->isPointerType() 274ca2f3fdeedc4e4beea4f7572d6d975188d0bb5efMike Stump && !E->getType()->isBlockPointerType()) 275f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return false; 27687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner Result = PointerExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 277f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return Result.isLValue(); 278f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 279650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 280f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris LattnerAPValue PointerExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 281650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() != BinaryOperator::Add && 282650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson E->getOpcode() != BinaryOperator::Sub) 283650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 284650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 285650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *PExp = E->getLHS(); 286650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *IExp = E->getRHS(); 287650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (IExp->getType()->isPointerType()) 288f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner std::swap(PExp, IExp); 289650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 290650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue ResultLValue; 29187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(PExp, ResultLValue, Info)) 292650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 293f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 294650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson llvm::APSInt AdditionalOffset(32); 29587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluateInteger(IExp, AdditionalOffset, Info)) 296650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 297650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 2984efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman QualType PointeeType = PExp->getType()->getAsPointerType()->getPointeeType(); 2994d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson uint64_t SizeOfPointee; 3004d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson 3014d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson // Explicitly handle GNU void* and function pointer arithmetic extensions. 3024d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson if (PointeeType->isVoidType() || PointeeType->isFunctionType()) 3034d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson SizeOfPointee = 1; 3044d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson else 3054d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson SizeOfPointee = Info.Ctx.getTypeSize(PointeeType) / 8; 3064efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 307650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson uint64_t Offset = ResultLValue.getLValueOffset(); 3084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 309650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() == BinaryOperator::Add) 3104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Offset += AdditionalOffset.getLimitedValue() * SizeOfPointee; 311650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson else 3124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Offset -= AdditionalOffset.getLimitedValue() * SizeOfPointee; 3134efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 314650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(ResultLValue.getLValueBase(), Offset); 315650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 3164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3174efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue PointerExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 3184efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->getOpcode() == UnaryOperator::Extension) { 3194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // FIXME: Deal with warnings? 3204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Visit(E->getSubExpr()); 3214efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->getOpcode() == UnaryOperator::AddrOf) { 3244efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue result; 3254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluateLValue(E->getSubExpr(), result, Info)) 3264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return result; 3274efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3284efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3294efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 3304efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 331d407a7619904c81d38b41a9ee850de413105084bAnders Carlsson 332650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 333b542afe02d317411d53b3541946f9f2a8f509a11Chris LattnerAPValue PointerExprEvaluator::VisitCastExpr(const CastExpr* E) { 334650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr* SubExpr = E->getSubExpr(); 335650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 336650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson // Check for pointer->pointer cast 337650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (SubExpr->getType()->isPointerType()) { 338650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson APValue Result; 33987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (EvaluatePointer(SubExpr, Result, Info)) 340650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return Result; 341f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner return APValue(); 342650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 343650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 344d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman if (SubExpr->getType()->isIntegralType()) { 345650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson llvm::APSInt Result(32); 34687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (EvaluateInteger(SubExpr, Result, Info)) { 34787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner Result.extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 348650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(0, Result.getZExtValue()); 349650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 350650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 3514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3524efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isFunctionType() || 3534efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman SubExpr->getType()->isArrayType()) { 3544efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue Result; 3554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluateLValue(SubExpr, Result, Info)) 3564efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result; 3574efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 3584efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3604efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman //assert(0 && "Unhandled cast"); 361650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson return APValue(); 362650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 363650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 3643941b18b8e441c8c466efecd557de60b9a32d10bEli FriedmanAPValue PointerExprEvaluator::VisitCallExpr(CallExpr *E) { 3653c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor if (E->isBuiltinCall(Info.Ctx) == 3663c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor Builtin::BI__builtin___CFStringMakeConstantString) 3673941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman return APValue(E, 0); 3683941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman return APValue(); 3693941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman} 3703941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman 3714efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli FriedmanAPValue PointerExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 3724efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 3734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 3744efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 3754efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 3774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3784efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APValue Result; 3794efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (EvaluatePointer(EvalExpr, Result, Info)) 3804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return Result; 3814efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return APValue(); 3824efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 383f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 384f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 38559b5da6d853b4368b984700315adf7b37de05764Nate Begeman// Vector Evaluation 38659b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 38759b5da6d853b4368b984700315adf7b37de05764Nate Begeman 38859b5da6d853b4368b984700315adf7b37de05764Nate Begemannamespace { 38959b5da6d853b4368b984700315adf7b37de05764Nate Begeman class VISIBILITY_HIDDEN VectorExprEvaluator 39059b5da6d853b4368b984700315adf7b37de05764Nate Begeman : public StmtVisitor<VectorExprEvaluator, APValue> { 39159b5da6d853b4368b984700315adf7b37de05764Nate Begeman EvalInfo &Info; 39259b5da6d853b4368b984700315adf7b37de05764Nate Begeman public: 39359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 39459b5da6d853b4368b984700315adf7b37de05764Nate Begeman VectorExprEvaluator(EvalInfo &info) : Info(info) {} 39559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 39659b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitStmt(Stmt *S) { 39759b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 39859b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 39959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 40059b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 40159b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCastExpr(const CastExpr* E); 40259b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 40359b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitInitListExpr(const InitListExpr *E); 40459b5da6d853b4368b984700315adf7b37de05764Nate Begeman }; 40559b5da6d853b4368b984700315adf7b37de05764Nate Begeman} // end anonymous namespace 40659b5da6d853b4368b984700315adf7b37de05764Nate Begeman 40759b5da6d853b4368b984700315adf7b37de05764Nate Begemanstatic bool EvaluateVector(const Expr* E, APValue& Result, EvalInfo &Info) { 40859b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!E->getType()->isVectorType()) 40959b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 41059b5da6d853b4368b984700315adf7b37de05764Nate Begeman Result = VectorExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 41159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return !Result.isUninit(); 41259b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 41359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 41459b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue VectorExprEvaluator::VisitCastExpr(const CastExpr* E) { 41559b5da6d853b4368b984700315adf7b37de05764Nate Begeman const Expr* SE = E->getSubExpr(); 41659b5da6d853b4368b984700315adf7b37de05764Nate Begeman 41759b5da6d853b4368b984700315adf7b37de05764Nate Begeman // Check for vector->vector bitcast. 41859b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (SE->getType()->isVectorType()) 41959b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(SE)); 42059b5da6d853b4368b984700315adf7b37de05764Nate Begeman 42159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 42259b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 42359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 42459b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue 42559b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 42659b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(E->getInitializer())); 42759b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 42859b5da6d853b4368b984700315adf7b37de05764Nate Begeman 42959b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue 43059b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 43159b5da6d853b4368b984700315adf7b37de05764Nate Begeman const VectorType *VT = E->getType()->getAsVectorType(); 43259b5da6d853b4368b984700315adf7b37de05764Nate Begeman unsigned NumInits = E->getNumInits(); 43359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 43459b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!VT || VT->getNumElements() != NumInits) 43559b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 43659b5da6d853b4368b984700315adf7b37de05764Nate Begeman 43759b5da6d853b4368b984700315adf7b37de05764Nate Begeman QualType EltTy = VT->getElementType(); 43859b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::SmallVector<APValue, 4> Elements; 43959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 44059b5da6d853b4368b984700315adf7b37de05764Nate Begeman for (unsigned i = 0; i < NumInits; i++) { 44159b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (EltTy->isIntegerType()) { 44259b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APSInt sInt(32); 44359b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!EvaluateInteger(E->getInit(i), sInt, Info)) 44459b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 44559b5da6d853b4368b984700315adf7b37de05764Nate Begeman Elements.push_back(APValue(sInt)); 44659b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else { 44759b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APFloat f(0.0); 44859b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!EvaluateFloat(E->getInit(i), f, Info)) 44959b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 45059b5da6d853b4368b984700315adf7b37de05764Nate Begeman Elements.push_back(APValue(f)); 45159b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 45259b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 45359b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(&Elements[0], Elements.size()); 45459b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 45559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 45659b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 457f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Integer Evaluation 458f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 459f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 460f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnernamespace { 461f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerclass VISIBILITY_HIDDEN IntExprEvaluator 462b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner : public StmtVisitor<IntExprEvaluator, bool> { 46387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 46430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue &Result; 465f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerpublic: 46630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar IntExprEvaluator(EvalInfo &info, APValue &result) 46787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner : Info(info), Result(result) {} 468f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 46982206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Extension(SourceLocation L, diag::kind D, const Expr *E) { 47054da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.DiagLoc = L; 47154da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.Diag = D; 47282206e267ce6cc709797127616f64672d255b310Anders Carlsson Info.EvalResult.DiagExpr = E; 47354176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return true; // still a constant. 47454176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner } 475131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 4763f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar bool Success(const llvm::APSInt &SI, const Expr *E) { 47730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.isSigned() == E->getType()->isSignedIntegerType() && 4783f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 47930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 4803f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 48130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(SI); 4823f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 4833f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 4843f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 485131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(const llvm::APInt &I, const Expr *E) { 48630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(I.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 4873f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 48830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(APSInt(I)); 48930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt().setIsUnsigned(E->getType()->isUnsignedIntegerType()); 490131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 491131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 492131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 493131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(uint64_t Value, const Expr *E) { 49430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(Info.Ctx.MakeIntValue(Value, E->getType())); 495131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 496131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 497131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 49882206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Error(SourceLocation L, diag::kind D, const Expr *E) { 49954176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner // If this is in an unevaluated portion of the subexpression, ignore the 50054176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner // error. 501f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson if (Info.ShortCircuit) { 50232fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // If error is ignored because the value isn't evaluated, get the real 50332fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // type at least to prevent errors downstream. 504131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 50532fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 50654176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 50732fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // Take the first error. 50830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 50930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar // FIXME: This is wrong if we happen to have already emitted an 51030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar // extension diagnostic; in that case we should report this error. 51154da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson if (Info.EvalResult.Diag == 0) { 51254da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.DiagLoc = L; 51354da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.Diag = D; 51482206e267ce6cc709797127616f64672d255b310Anders Carlsson Info.EvalResult.DiagExpr = E; 51532fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 51654176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return false; 5177a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner } 5187a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner 519f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 520f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner // Visitor Methods 521f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 52232fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner 52332fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitStmt(Stmt *) { 52432fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner assert(0 && "This should be called on integers, stmts are not integers"); 52532fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner return false; 52632fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 5277a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner 52832fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitExpr(Expr *E) { 5290e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 530f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner } 531f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 532b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 533f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 5344c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitIntegerLiteral(const IntegerLiteral *E) { 535131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 5364c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 5374c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCharacterLiteral(const CharacterLiteral *E) { 538131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 5394c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 5404c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitTypesCompatibleExpr(const TypesCompatibleExpr *E) { 541ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // Per gcc docs "this built-in function ignores top level 542ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // qualifiers". We need to use the canonical version to properly 543ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // be able to strip CRV qualifiers from the type. 544ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T0 = Info.Ctx.getCanonicalType(E->getArgType1()); 545ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T1 = Info.Ctx.getCanonicalType(E->getArgType2()); 546131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(Info.Ctx.typesAreCompatible(T0.getUnqualifiedType(), 547131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar T1.getUnqualifiedType()), 548131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 5494c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 5504c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitDeclRefExpr(const DeclRefExpr *E); 5514c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCallExpr(const CallExpr *E); 552b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitBinaryOperator(const BinaryOperator *E); 553b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitUnaryOperator(const UnaryOperator *E); 554ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes bool VisitConditionalOperator(const ConditionalOperator *E); 555f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 556a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool VisitCastExpr(CastExpr* E); 5570518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl bool VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E); 5580518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 5593068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 560131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 5613068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 5623068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 5633f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson bool VisitGNUNullExpr(const GNUNullExpr *E) { 564131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 5653f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson } 5663f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson 5673068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXZeroInitValueExpr(const CXXZeroInitValueExpr *E) { 568131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 5693068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 5703068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 57164b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) { 572131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->EvaluateTrait(), E); 57364b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl } 57464b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl 575fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattnerprivate: 576af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner unsigned GetAlignOfExpr(const Expr *E); 577af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner unsigned GetAlignOfType(QualType T); 578f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner}; 579f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 580f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 58187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluateInteger(const Expr* E, APSInt &Result, EvalInfo &Info) { 5823f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!E->getType()->isIntegralType()) 5833f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return false; 58430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 58530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue Val; 58630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!IntExprEvaluator(Info, Val).Visit(const_cast<Expr*>(E)) || 58730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar !Val.isInt()) 58830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 58930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 59030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = Val.getInt(); 59130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return true; 592f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 593f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 5944c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattnerbool IntExprEvaluator::VisitDeclRefExpr(const DeclRefExpr *E) { 5954c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Enums are integer constant exprs. 5964c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner if (const EnumConstantDecl *D = dyn_cast<EnumConstantDecl>(E->getDecl())) { 597e9a0f43927041e2bcc89140c338dfae207ad3c3bEli Friedman // FIXME: This is an ugly hack around the fact that enums don't set their 5983f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // signedness consistently; see PR3173. 5993f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar APSInt SI = D->getInitVal(); 6003f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar SI.setIsUnsigned(!E->getType()->isSignedIntegerType()); 6013f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // FIXME: This is an ugly hack around the fact that enums don't 6023f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // set their width (!?!) consistently; see PR3173. 6033f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar SI.extOrTrunc(Info.Ctx.getIntWidth(E->getType())); 6043f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(SI, E); 6054c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 606b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 607b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl // In C++, const, non-volatile integers initialized with ICEs are ICEs. 608b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl if (Info.Ctx.getLangOptions().CPlusPlus && 609b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl E->getType().getCVRQualifiers() == QualType::Const) { 610b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl if (const VarDecl *D = dyn_cast<VarDecl>(E->getDecl())) { 611b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl if (const Expr *Init = D->getInit()) 612b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl return Visit(const_cast<Expr*>(Init)); 613b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 614b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 615b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 6164c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Otherwise, random variable references are not constants. 6170e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 6184c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 6194c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner 620a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way 621a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// as GCC. 622a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattnerstatic int EvaluateBuiltinClassifyType(const CallExpr *E) { 623a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // The following enum mimics the values returned by GCC. 624a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enum gcc_type_class { 625a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner no_type_class = -1, 626a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner void_type_class, integer_type_class, char_type_class, 627a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enumeral_type_class, boolean_type_class, 628a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner pointer_type_class, reference_type_class, offset_type_class, 629a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner real_type_class, complex_type_class, 630a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner function_type_class, method_type_class, 631a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner record_type_class, union_type_class, 632a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner array_type_class, string_type_class, 633a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner lang_type_class 634a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner }; 635a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 636a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // If no argument was supplied, default to "no_type_class". This isn't 637a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // ideal, however it is what gcc does. 638a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (E->getNumArgs() == 0) 639a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return no_type_class; 640a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 641a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner QualType ArgTy = E->getArg(0)->getType(); 642a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (ArgTy->isVoidType()) 643a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return void_type_class; 644a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isEnumeralType()) 645a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return enumeral_type_class; 646a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isBooleanType()) 647a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return boolean_type_class; 648a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isCharType()) 649a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return string_type_class; // gcc doesn't appear to use char_type_class 650a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isIntegerType()) 651a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return integer_type_class; 652a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isPointerType()) 653a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return pointer_type_class; 654a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isReferenceType()) 655a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return reference_type_class; 656a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isRealType()) 657a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return real_type_class; 658a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isComplexType()) 659a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return complex_type_class; 660a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isFunctionType()) 661a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return function_type_class; 662a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isStructureType()) 663a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return record_type_class; 664a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 665a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 666a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isArrayType()) 667a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return array_type_class; 668a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 669a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 670a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else // FIXME: offset_type_class, method_type_class, & lang_type_class? 671a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner assert(0 && "CallExpr::isBuiltinClassifyType(): unimplemented type"); 672a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return -1; 673a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner} 674a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 6754c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattnerbool IntExprEvaluator::VisitCallExpr(const CallExpr *E) { 6763c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 677019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner default: 6780e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 679019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_classify_type: 680131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(EvaluateBuiltinClassifyType(E), E); 681019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 6824bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson case Builtin::BI__builtin_constant_p: 683019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // __builtin_constant_p always has one operand: it returns true if that 684019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // operand can be folded, false otherwise. 685131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getArg(0)->isEvaluatable(Info.Ctx), E); 686019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 6874c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 688f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 689b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 690a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == BinaryOperator::Comma) { 691027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson if (!Visit(E->getRHS())) 692027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return false; 6934fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson 6944fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson if (!Info.ShortCircuit) { 6954fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson // If we can't evaluate the LHS, it must be because it has 6964fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson // side effects. 6974fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson if (!E->getLHS()->isEvaluatable(Info.Ctx)) 6984fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson Info.EvalResult.HasSideEffects = true; 6994fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson 7000e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Extension(E->getOperatorLoc(), diag::note_comma_in_ice, E); 7014fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson } 702c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner 703027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return true; 704a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 705a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 706a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->isLogicalOp()) { 707a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // These need to be handled specially because the operands aren't 708a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // necessarily integral 709fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool lhsResult, rhsResult; 71051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 711fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getLHS(), lhsResult, Info)) { 71251fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // We were able to evaluate the LHS, see if we can get away with not 71351fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // evaluating the RHS: 0 && X -> 0, 1 || X -> 1 714fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (lhsResult == (E->getOpcode() == BinaryOperator::LOr) || 715fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson !lhsResult == (E->getOpcode() == BinaryOperator::LAnd)) { 716f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson Info.ShortCircuit++; 717fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool rhsEvaluated = HandleConversionToBool(E->getRHS(), rhsResult, Info); 718f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson Info.ShortCircuit--; 719f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson 720fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // FIXME: Return an extension warning saying that the RHS could not be 721fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // evaluated. 7223f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar // if (!rhsEvaluated) ... 7233f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar (void) rhsEvaluated; 7243f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 7253f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(lhsResult, E); 726a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 727a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 728fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 7294bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson if (E->getOpcode() == BinaryOperator::LOr) 730131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult || rhsResult, E); 7314bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson else 732131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult && rhsResult, E); 7334bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 7344bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } else { 735fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 7364bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // We can't evaluate the LHS; however, sometimes the result 7374bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // is determined by the RHS: X && 0 -> 0, X || 1 -> 1. 738fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (rhsResult == (E->getOpcode() == BinaryOperator::LOr) || 739fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson !rhsResult == (E->getOpcode() == BinaryOperator::LAnd)) { 740131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // Since we weren't able to evaluate the left hand side, it 741fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // must have had side effects. 742fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson Info.EvalResult.HasSideEffects = true; 743131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 744131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(rhsResult, E); 7454bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 7464bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 747a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 748a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 749a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 750c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner } 75154176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 752286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType LHSTy = E->getLHS()->getType(); 753286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType RHSTy = E->getRHS()->getType(); 7544087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 7554087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHSTy->isAnyComplexType()) { 7564087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar assert(RHSTy->isAnyComplexType() && "Invalid comparison"); 7574087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar APValue LHS, RHS; 7584087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 7594087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getLHS(), LHS, Info)) 7604087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 7614087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 7624087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 7634087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 7644087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 7654087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHS.isComplexFloat()) { 7664087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar APFloat::cmpResult CR_r = 7674087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatReal().compare(RHS.getComplexFloatReal()); 7684087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar APFloat::cmpResult CR_i = 7694087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatImag().compare(RHS.getComplexFloatImag()); 7704087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 7714087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 772131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((CR_r == APFloat::cmpEqual && 773131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpEqual), E); 774131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 775131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 776131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid complex comparison."); 777131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(((CR_r == APFloat::cmpGreaterThan || 778131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_r == APFloat::cmpLessThan) && 779131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar (CR_i == APFloat::cmpGreaterThan || 780131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpLessThan)), E); 781131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 7824087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } else { 7834087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 784131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() == RHS.getComplexIntReal() && 785131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() == RHS.getComplexIntImag()), E); 786131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 787131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 788131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid compex comparison."); 789131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() != RHS.getComplexIntReal() || 790131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() != RHS.getComplexIntImag()), E); 791131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 7924087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 7934087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 794286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson 795286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (LHSTy->isRealFloatingType() && 796286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson RHSTy->isRealFloatingType()) { 797286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat RHS(0.0), LHS(0.0); 798286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson 799286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getRHS(), RHS, Info)) 800286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 801286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson 802286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getLHS(), LHS, Info)) 803286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 804286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson 805286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat::cmpResult CR = LHS.compare(RHS); 806529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson 807286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson switch (E->getOpcode()) { 808286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson default: 809286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson assert(0 && "Invalid binary operator!"); 810286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LT: 811131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan, E); 812286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GT: 813131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan, E); 814286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LE: 815131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan || CR == APFloat::cmpEqual, E); 816286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GE: 817131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan || CR == APFloat::cmpEqual, 818131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 819286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::EQ: 820131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpEqual, E); 821286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::NE: 822131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan 823131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar || CR == APFloat::cmpLessThan, E); 824286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 825286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 826286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson 8273068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (E->getOpcode() == BinaryOperator::Sub) { 828529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson if (LHSTy->isPointerType() && RHSTy->isPointerType()) { 8293068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue LHSValue; 8303068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getLHS(), LHSValue, Info)) 8313068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 8323068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 8333068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APValue RHSValue; 8343068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getRHS(), RHSValue, Info)) 8353068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 8363068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 8373068d117951a8df54bae9db039b56201ab10962bAnders Carlsson // FIXME: Is this correct? What if only one of the operands has a base? 8383068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (LHSValue.getLValueBase() || RHSValue.getLValueBase()) 8393068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 8403068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 8413068d117951a8df54bae9db039b56201ab10962bAnders Carlsson const QualType Type = E->getLHS()->getType(); 8423068d117951a8df54bae9db039b56201ab10962bAnders Carlsson const QualType ElementType = Type->getAsPointerType()->getPointeeType(); 8433068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 8443068d117951a8df54bae9db039b56201ab10962bAnders Carlsson uint64_t D = LHSValue.getLValueOffset() - RHSValue.getLValueOffset(); 8453068d117951a8df54bae9db039b56201ab10962bAnders Carlsson D /= Info.Ctx.getTypeSize(ElementType) / 8; 8463068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 847131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(D, E); 8483068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 8493068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 850286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!LHSTy->isIntegralType() || 851286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson !RHSTy->isIntegralType()) { 852a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // We can't continue from here for non-integral types, and they 853a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // could potentially confuse the following operations. 854a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // FIXME: Deal with EQ and friends. 855a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 856a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 857a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 858a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // The LHS of a constant expr is always evaluated and needed. 85930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Visit(E->getLHS())) 860a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; // error in subexpression. 861d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman 86230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar // Only support arithmetic on integers for now. 86330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) 86430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 86530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 866131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar llvm::APSInt RHS; 86754176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (!EvaluateInteger(E->getRHS(), RHS, Info)) 868b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 869a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 870a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson switch (E->getOpcode()) { 87132fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner default: 8720e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 87330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Mul: return Success(Result.getInt() * RHS, E); 87430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Add: return Success(Result.getInt() + RHS, E); 87530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Sub: return Success(Result.getInt() - RHS, E); 87630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::And: return Success(Result.getInt() & RHS, E); 87730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Xor: return Success(Result.getInt() ^ RHS, E); 87830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Or: return Success(Result.getInt() | RHS, E); 879a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Div: 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); 883a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Rem: 88454176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 8850e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 88630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() % RHS, E); 8873f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shl: { 88854176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner // FIXME: Warn about out of range shift amounts! 88930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar unsigned SA = 89030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 89130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() << SA, E); 8923f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 8933f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shr: { 89430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar unsigned SA = 89530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 89630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() >> SA, E); 8973f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 898b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner 89930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LT: return Success(Result.getInt() < RHS, E); 90030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GT: return Success(Result.getInt() > RHS, E); 90130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LE: return Success(Result.getInt() <= RHS, E); 90230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GE: return Success(Result.getInt() >= RHS, E); 90330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::EQ: return Success(Result.getInt() == RHS, E); 90430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::NE: return Success(Result.getInt() != RHS, E); 905b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 906a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 907a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 908ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopesbool IntExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 909a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes bool Cond; 910a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes if (!HandleConversionToBool(E->getCond(), Cond, Info)) 911ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes return false; 912ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 913a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 914ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes} 915ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 916af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattnerunsigned IntExprEvaluator::GetAlignOfType(QualType T) { 917e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner const Type *Ty = Info.Ctx.getCanonicalType(T).getTypePtr(); 918e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 919e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // __alignof__(void) = 1 as a gcc extension. 920e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (Ty->isVoidType()) 921e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return 1; 922e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 923e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // GCC extension: alignof(function) = 4. 924e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // FIXME: AlignOf shouldn't be unconditionally 4! It should listen to the 925e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // attribute(align) directive. 926e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (Ty->isFunctionType()) 927e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return 4; 928e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 929f11284ac87daa613bc7b30db9f54bd716d123222Fariborz Jahanian if (const ExtQualType *EXTQT = dyn_cast<ExtQualType>(Ty)) 930f11284ac87daa613bc7b30db9f54bd716d123222Fariborz Jahanian return GetAlignOfType(QualType(EXTQT->getBaseType(), 0)); 931e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 932e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // alignof VLA/incomplete array. 933e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (const ArrayType *VAT = dyn_cast<ArrayType>(Ty)) 934e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(VAT->getElementType()); 935e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 936e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // sizeof (objc class)? 937e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (isa<ObjCInterfaceType>(Ty)) 938e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return 1; // FIXME: This probably isn't right. 939e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 940e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the alignment. 941e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner unsigned CharSize = Info.Ctx.Target.getCharWidth(); 942e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return Info.Ctx.getTypeAlign(Ty) / CharSize; 943e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 944e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 945af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattnerunsigned IntExprEvaluator::GetAlignOfExpr(const Expr *E) { 946af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner E = E->IgnoreParens(); 947af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 948af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // alignof decl is always accepted, even if it doesn't make sense: we default 949af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // to 1 in those cases. 950af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 951b7d0844c887a72064b624dc6df12cbe1441f69d0Daniel Dunbar return Info.Ctx.getDeclAlignInBytes(DRE->getDecl()); 952af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 953af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) 954b7d0844c887a72064b624dc6df12cbe1441f69d0Daniel Dunbar return Info.Ctx.getDeclAlignInBytes(ME->getMemberDecl()); 955af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 956e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(E->getType()); 957e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 958e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 959e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 9600518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// VisitSizeAlignOfExpr - Evaluate a sizeof or alignof with a result as the 9610518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// expression's type. 9620518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redlbool IntExprEvaluator::VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E) { 9630518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType DstTy = E->getType(); 964fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 965e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Handle alignof separately. 966e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!E->isSizeOf()) { 967e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (E->isArgumentType()) 968131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(GetAlignOfType(E->getArgumentType()), E); 969e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner else 970131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(GetAlignOfExpr(E->getArgumentExpr()), E); 971e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner } 972e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 9730518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType SrcTy = E->getTypeOfArgument(); 9740518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 975131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc 976131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // extension. 977131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar if (SrcTy->isVoidType() || SrcTy->isFunctionType()) 978131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(1, E); 979fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 980fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. 981e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!SrcTy->isConstantSizeType()) 982fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner return false; 983f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 984f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman if (SrcTy->isObjCInterfaceType()) { 985f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman // Slightly unusual case: the size of an ObjC interface type is the 986f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman // size of the class. This code intentionally falls through to the normal 987f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman // case. 988f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman ObjCInterfaceDecl *OI = SrcTy->getAsObjCInterfaceType()->getDecl(); 989f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman RecordDecl *RD = const_cast<RecordDecl*>(Info.Ctx.addRecordToClass(OI)); 990f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman SrcTy = Info.Ctx.getTagDeclType(static_cast<TagDecl*>(RD)); 991f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman } 992f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 993e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the size. 99487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner unsigned CharSize = Info.Ctx.Target.getCharWidth(); 995131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(Info.Ctx.getTypeSize(SrcTy) / CharSize, E); 996fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner} 997fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 998b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 9994c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Special case unary operators that do not need their subexpression 10004c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // evaluated. offsetof/sizeof/alignof are all special. 1001131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar if (E->isOffsetOfOp()) 1002131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->evaluateOffsetOf(Info.Ctx), E); 1003a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1004a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == UnaryOperator::LNot) { 1005a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // LNot's operand isn't necessarily an integer, so we handle it specially. 1006a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman bool bres; 1007a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!HandleConversionToBool(E->getSubExpr(), bres, Info)) 1008a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1009131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(!bres, E); 1010a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1011a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 101287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner // Get the operand value into 'Result'. 101387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!Visit(E->getSubExpr())) 101475a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner return false; 1015a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 101675a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner switch (E->getOpcode()) { 10174c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner default: 101875a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 101975a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // See C99 6.6p3. 10200e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 102175a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Extension: 10224c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // FIXME: Should extension allow i-c-e extension expressions in its scope? 10234c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // If so, we could clear the diagnostic ID. 10243f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 102575a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Plus: 10264c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // The result is always just the subexpr. 10273f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 102875a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Minus: 102930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 103030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(-Result.getInt(), E); 103175a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Not: 103230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 103330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(~Result.getInt(), E); 103406a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson } 1035a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 1036a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 1037732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// HandleCast - This is used to evaluate implicit or explicit casts where the 1038732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// result type is integer. 1039a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarbool IntExprEvaluator::VisitCastExpr(CastExpr *E) { 104082206e267ce6cc709797127616f64672d255b310Anders Carlsson Expr *SubExpr = E->getSubExpr(); 104182206e267ce6cc709797127616f64672d255b310Anders Carlsson QualType DestType = E->getType(); 104282206e267ce6cc709797127616f64672d255b310Anders Carlsson 10434efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (DestType->isBooleanType()) { 10444efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 10454efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(SubExpr, BoolResult, Info)) 10464efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1047131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(BoolResult, E); 10484efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 10494efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1050a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson // Handle simple integer->integer casts. 1051a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (SubExpr->getType()->isIntegralType()) { 1052732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!Visit(SubExpr)) 1053b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1054a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 105530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar // FIXME: Support cast on LValue results. 105630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) 105730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 105830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 10593f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(HandleIntToIntCast(DestType, SubExpr->getType(), 106030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt(), Info.Ctx), E); 1061732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner } 1062732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 1063732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner // FIXME: Clean this up! 1064732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (SubExpr->getType()->isPointerType()) { 1065a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson APValue LV; 106687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(SubExpr, LV, Info)) 1067b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 10684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1069a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson if (LV.getLValueBase()) 1070b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 10714efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1072131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(LV.getLValueOffset(), E); 10732bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 10744efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1075732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!SubExpr->getType()->isRealFloatingType()) 10760e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1077732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 1078d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat F(0.0); 1079d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(SubExpr, F, Info)) 10800e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1081732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 10823f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(HandleFloatToIntCast(DestType, SubExpr->getType(), 10833f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar F, Info.Ctx), E); 1084a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 10852bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 1086f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1087d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman// Float Evaluation 1088d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1089d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1090d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmannamespace { 1091d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanclass VISIBILITY_HIDDEN FloatExprEvaluator 1092d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : public StmtVisitor<FloatExprEvaluator, bool> { 1093d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman EvalInfo &Info; 1094d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat &Result; 1095d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanpublic: 1096d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman FloatExprEvaluator(EvalInfo &info, APFloat &result) 1097d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : Info(info), Result(result) {} 1098d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1099d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitStmt(Stmt *S) { 1100d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1101d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1102d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1103d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 1104019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner bool VisitCallExpr(const CallExpr *E); 1105d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 11065db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar bool VisitUnaryOperator(const UnaryOperator *E); 1107d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 1108d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitFloatingLiteral(const FloatingLiteral *E); 11094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCastExpr(CastExpr *E); 11104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E); 1111d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman}; 1112d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} // end anonymous namespace 1113d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1114d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) { 1115d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return FloatExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 1116d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1117d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1118019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattnerbool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) { 11193c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 112034a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner default: return false; 1121019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_val: 1122019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_valf: 1123019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_vall: 1124019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inf: 1125019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inff: 11267cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar case Builtin::BI__builtin_infl: { 11277cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 11287cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 112934a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner Result = llvm::APFloat::getInf(Sem); 113034a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner return true; 11317cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar } 11329e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner 11339e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nan: 11349e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanf: 11359e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanl: 11369e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // If this is __builtin_nan("") turn this into a simple nan, otherwise we 11379e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // can't constant fold it. 11389e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner if (const StringLiteral *S = 11399e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner dyn_cast<StringLiteral>(E->getArg(0)->IgnoreParenCasts())) { 11409e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner if (!S->isWide() && S->getByteLength() == 0) { // empty string. 11417cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 11427cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 11439e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner Result = llvm::APFloat::getNaN(Sem); 11449e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner return true; 11459e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner } 11469e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner } 11479e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner return false; 11485db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 11495db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabs: 11505db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsf: 11515db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsl: 11525db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info)) 11535db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 11545db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 11555db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (Result.isNegative()) 11565db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 11575db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 11585db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 11595db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysign: 11605db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignf: 11615db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignl: { 11625db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.); 11635db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info) || 11645db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar !EvaluateFloat(E->getArg(1), RHS, Info)) 11655db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 11665db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.copySign(RHS); 11675db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 11685db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 1169019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 1170019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner} 1171019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 11725db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbarbool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 1173a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes if (E->getOpcode() == UnaryOperator::Deref) 1174a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes return false; 1175a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes 11765db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getSubExpr(), Result, Info)) 11775db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 11785db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 11795db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar switch (E->getOpcode()) { 11805db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar default: return false; 11815db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case UnaryOperator::Plus: 11825db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 11835db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case UnaryOperator::Minus: 11845db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 11855db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 11865db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 11875db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar} 1188019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 1189d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 1190d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // FIXME: Diagnostics? I really don't understand how the warnings 1191d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // and errors are supposed to work. 11925db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.0); 1193d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getLHS(), Result, Info)) 1194d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1195d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1196d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1197d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1198d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman switch (E->getOpcode()) { 1199d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman default: return false; 1200d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Mul: 1201d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.multiply(RHS, APFloat::rmNearestTiesToEven); 1202d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1203d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Add: 1204d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.add(RHS, APFloat::rmNearestTiesToEven); 1205d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1206d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Sub: 1207d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.subtract(RHS, APFloat::rmNearestTiesToEven); 1208d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1209d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Div: 1210d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.divide(RHS, APFloat::rmNearestTiesToEven); 1211d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1212d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Rem: 1213d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.mod(RHS, APFloat::rmNearestTiesToEven); 1214d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1215d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1216d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1217d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1218d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) { 1219d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result = E->getValue(); 1220d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1221d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1222d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 12234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCastExpr(CastExpr *E) { 12244efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* SubExpr = E->getSubExpr(); 122559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 12264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isIntegralType()) { 12274efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 12283f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!EvaluateInteger(SubExpr, IntResult, Info)) 12294efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1230a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleIntToFloatCast(E->getType(), SubExpr->getType(), 1231a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar IntResult, Info.Ctx); 12324efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 12334efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 12344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isRealFloatingType()) { 12354efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!Visit(SubExpr)) 12364efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1237a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(E->getType(), SubExpr->getType(), 1238a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result, Info.Ctx); 12394efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 12404efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 12414efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 12424efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 12434efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 12444efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 12454efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCXXZeroInitValueExpr(CXXZeroInitValueExpr *E) { 12464efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(E->getType())); 12474efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 12484efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 12494efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1250d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1251a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar// Complex Evaluation (for float and integer) 12529ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 12539ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12549ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonnamespace { 1255a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbarclass VISIBILITY_HIDDEN ComplexExprEvaluator 1256a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar : public StmtVisitor<ComplexExprEvaluator, APValue> { 12579ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson EvalInfo &Info; 12589ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12599ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonpublic: 1260a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar ComplexExprEvaluator(EvalInfo &info) : Info(info) {} 12619ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12629ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 12639ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson // Visitor Methods 12649ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 12659ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12669ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitStmt(Stmt *S) { 12679ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson return APValue(); 12689ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 12699ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12709ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 12719ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12729ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson APValue VisitImaginaryLiteral(ImaginaryLiteral *E) { 1273a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Expr* SubExpr = E->getSubExpr(); 1274a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1275a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (SubExpr->getType()->isRealFloatingType()) { 1276a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat Result(0.0); 1277a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1278a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateFloat(SubExpr, Result, Info)) 1279a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 12809ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 12813f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar return APValue(APFloat(Result.getSemantics(), APFloat::fcZero, false), 1282a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result); 1283a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1284a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar assert(SubExpr->getType()->isIntegerType() && 1285a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar "Unexpected imaginary literal."); 1286a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1287a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Result; 1288a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateInteger(SubExpr, Result, Info)) 1289a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 1290a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1291a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Zero(Result.getBitWidth(), !Result.isSigned()); 1292a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Zero = 0; 1293a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(Zero, Result); 1294a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 12959ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 12969ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 1297ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue VisitCastExpr(CastExpr *E) { 1298ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson Expr* SubExpr = E->getSubExpr(); 1299a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType EltType = E->getType()->getAsComplexType()->getElementType(); 1300a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SubType = SubExpr->getType(); 1301ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1302a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (SubType->isRealFloatingType()) { 1303ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APFloat Result(0.0); 1304ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1305ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson if (!EvaluateFloat(SubExpr, Result, Info)) 1306ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1307ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1308a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Apply float conversion if necessary. 1309a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(EltType, SubType, Result, Info.Ctx); 13108f826f0e0c90b05ab04e84c29157d2e965713288Daniel Dunbar return APValue(Result, 13113f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat(Result.getSemantics(), APFloat::fcZero, false)); 1312a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else if (SubType->isIntegerType()) { 1313a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APSInt Result; 1314a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1315a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateInteger(SubExpr, Result, Info)) 1316a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(); 1317a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1318a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Apply integer conversion if necessary. 1319a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleIntToIntCast(EltType, SubType, Result, Info.Ctx); 1320a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar llvm::APSInt Zero(Result.getBitWidth(), !Result.isSigned()); 1321a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Zero = 0; 1322a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return APValue(Result, Zero); 1323a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else if (const ComplexType *CT = SubType->getAsComplexType()) { 1324a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APValue Src; 1325a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1326a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (!EvaluateComplex(SubExpr, Src, Info)) 1327a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(); 1328a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1329a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SrcType = CT->getElementType(); 1330a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1331a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (Src.isComplexFloat()) { 1332a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 1333a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleFloatToFloatCast(EltType, SrcType, 1334a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatReal(), 1335a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 1336a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar HandleFloatToFloatCast(EltType, SrcType, 1337a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatImag(), 1338a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1339a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1340a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleFloatToIntCast(EltType, SrcType, 1341a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatReal(), 1342a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 1343a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar HandleFloatToIntCast(EltType, SrcType, 1344a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexFloatImag(), 1345a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1346a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1347a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1348a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar assert(Src.isComplexInt() && "Invalid evaluate result."); 1349a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 1350a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleIntToFloatCast(EltType, SrcType, 1351a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntReal(), 1352a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 1353a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar HandleIntToFloatCast(EltType, SrcType, 1354a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntImag(), 1355a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1356a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 1357a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APValue(HandleIntToIntCast(EltType, SrcType, 1358a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntReal(), 1359a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx), 1360a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar HandleIntToIntCast(EltType, SrcType, 1361a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Src.getComplexIntImag(), 1362a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Info.Ctx)); 1363a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1364a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 1365ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1366ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1367ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson // FIXME: Handle more casts. 1368ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1369ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1370ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1371ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue VisitBinaryOperator(const BinaryOperator *E); 1372ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 13739ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson}; 13749ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} // end anonymous namespace 13759ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 1376a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbarstatic bool EvaluateComplex(const Expr *E, APValue &Result, EvalInfo &Info) 13779ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson{ 1378a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result = ComplexExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 1379a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar assert((!Result.isComplexFloat() || 1380a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar (&Result.getComplexFloatReal().getSemantics() == 1381a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar &Result.getComplexFloatImag().getSemantics())) && 1382a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar "Invalid complex evaluation."); 1383a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar return Result.isComplexFloat() || Result.isComplexInt(); 13849ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} 13859ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 1386a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel DunbarAPValue ComplexExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) 1387ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson{ 1388ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson APValue Result, RHS; 1389ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1390a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getLHS(), Result, Info)) 1391ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1392ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1393a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 1394ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return APValue(); 1395a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 13963f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar assert(Result.isComplexFloat() == RHS.isComplexFloat() && 13973f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar "Invalid operands to binary operator."); 1398ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson switch (E->getOpcode()) { 1399ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson default: return APValue(); 1400ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Add: 1401a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 1402a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().add(RHS.getComplexFloatReal(), 1403a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1404a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().add(RHS.getComplexFloatImag(), 1405a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1406a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1407a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() += RHS.getComplexIntReal(); 1408a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() += RHS.getComplexIntImag(); 1409a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 14103f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 1411ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Sub: 1412a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 1413a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().subtract(RHS.getComplexFloatReal(), 1414a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1415a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().subtract(RHS.getComplexFloatImag(), 1416a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 1417a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 1418a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() -= RHS.getComplexIntReal(); 1419a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() -= RHS.getComplexIntImag(); 1420a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 14213f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 14223f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar case BinaryOperator::Mul: 14233f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar if (Result.isComplexFloat()) { 14243f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APValue LHS = Result; 14253f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_r = LHS.getComplexFloatReal(); 14263f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_i = LHS.getComplexFloatImag(); 14273f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_r = RHS.getComplexFloatReal(); 14283f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_i = RHS.getComplexFloatImag(); 14293f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 14303f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat Tmp = LHS_r; 14313f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 14323f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal() = Tmp; 14333f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 14343f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 14353f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal().subtract(Tmp, APFloat::rmNearestTiesToEven); 14363f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 14373f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_r; 14383f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 14393f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag() = Tmp; 14403f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 14413f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 14423f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag().add(Tmp, APFloat::rmNearestTiesToEven); 14433f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } else { 14443f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APValue LHS = Result; 14453f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexIntReal() = 14463f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntReal() - 14473f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntImag()); 14483f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexIntImag() = 14493f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntImag() + 14503f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntReal()); 14513f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } 14523f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 1453ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 1454ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 1455ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson return Result; 1456ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson} 1457ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 14589ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 14596ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner// Top level Expr::Evaluate method. 1460f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1461f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 14626ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// Evaluate - Return true if this is a constant which we can fold using 1463019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// any crazy technique (that has nothing to do with language standards) that 1464019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// we want to. If this function returns true, it returns the folded constant 1465019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner/// in Result. 14665b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlssonbool Expr::Evaluate(EvalResult &Result, ASTContext &Ctx) const { 14675b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson EvalInfo Info(Ctx, Result); 146854da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson 146959b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (getType()->isVectorType()) { 147059b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!EvaluateVector(this, Result.Val, Info)) 147159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 147259b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else if (getType()->isIntegerType()) { 147330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!IntExprEvaluator(Info, Result.Val).Visit(const_cast<Expr*>(this))) 14746dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1475ca2f3fdeedc4e4beea4f7572d6d975188d0bb5efMike Stump } else if (getType()->isPointerType() 1476ca2f3fdeedc4e4beea4f7572d6d975188d0bb5efMike Stump || getType()->isBlockPointerType()) { 14775b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson if (!EvaluatePointer(this, Result.Val, Info)) 14786dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1479d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } else if (getType()->isRealFloatingType()) { 1480d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman llvm::APFloat f(0.0); 14816dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson if (!EvaluateFloat(this, f, Info)) 14826dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 14836dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson 14845b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson Result.Val = APValue(f); 1485a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else if (getType()->isAnyComplexType()) { 1486a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(this, Result.Val, Info)) 14876dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 1488a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else 14899d4c157baaada8945671dc98363a40ed00cbd824Anders Carlsson return false; 14906dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson 14915b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson return true; 14925b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson} 14935b45d4ef1ea3f04ec863daf8aa29be6c6e021750Anders Carlsson 14946ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// isEvaluatable - Call Evaluate to see if this expression can be constant 149545b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner/// folded, but discard the result. 149645b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattnerbool Expr::isEvaluatable(ASTContext &Ctx) const { 14974fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson EvalResult Result; 14984fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects; 149945b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner} 150051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 150151fe996231b1d7199f76e4005ff4c943d5deeecdAnders CarlssonAPSInt Expr::EvaluateAsInt(ASTContext &Ctx) const { 15021c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 15031c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson bool Result = Evaluate(EvalResult, Ctx); 1504f185319f25efd6094870f287030270fad26085baDaniel Dunbar Result = Result; 150551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson assert(Result && "Could not evaluate expression"); 15061c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(EvalResult.Val.isInt() && "Expression did not evaluate to integer"); 150751fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 15081c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson return EvalResult.Val.getInt(); 150951fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson} 1510