ExprConstant.cpp revision c6ed729f669044f5072a49d79041f455d971ece3
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" 16199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck#include "clang/AST/CharUnits.h" 1719cc4abea06a9b49e0e16a50d335c064cd723572Anders Carlsson#include "clang/AST/RecordLayout.h" 180fe52e1bcaa69ba127f1bda036f057fec1f478deSeo Sanghyeon#include "clang/AST/StmtVisitor.h" 198ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor#include "clang/AST/TypeLoc.h" 20500d3297d2a21edeac4d46cbcbe21bc2352c2a28Chris Lattner#include "clang/AST/ASTDiagnostic.h" 218ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor#include "clang/AST/Expr.h" 221b63e4f732dbc73d90abf886b4d21f8e3a165f6dChris Lattner#include "clang/Basic/Builtins.h" 2306a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson#include "clang/Basic/TargetInfo.h" 247462b39a9bccaf4392687831036713f09f9c0681Mike Stump#include "llvm/ADT/SmallString.h" 254572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump#include <cstring> 264572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump 27c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlssonusing namespace clang; 28f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerusing llvm::APSInt; 29d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanusing llvm::APFloat; 30c44eec6dd29ee9415cbd38a35deff4c8b67abb6aAnders Carlsson 3187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// EvalInfo - This is a private struct used by the evaluator to capture 3287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// information about a subexpression as it is folded. It retains information 3387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// about the AST context, but also maintains information about the folded 3487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// expression. 3587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// 3687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// If an expression could be evaluated, it is still possible it is not a C 3787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// "integer constant expression" or constant expression. If not, this struct 3887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// captures information about how and why not. 3987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// 4087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// One bit of information passed *into* the request for constant folding 4187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// indicates whether the subexpression is "evaluated" or not according to C 4287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// rules. For example, the RHS of (0 && foo()) is not evaluated. We can 4387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// evaluate the expression regardless of what the RHS is, but C only allows 4487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner/// certain things in certain situations. 4587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstruct EvalInfo { 4687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner ASTContext &Ctx; 471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4854da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson /// EvalResult - Contains information about the evaluation. 4954da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Expr::EvalResult &EvalResult; 50f0c1e4b679e15c26bffb5892e35985bf3c52f77aAnders Carlsson 5142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall EvalInfo(ASTContext &ctx, Expr::EvalResult& evalresult) 5242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall : Ctx(ctx), EvalResult(evalresult) {} 5387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner}; 5487eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 55f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallnamespace { 56f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall struct ComplexValue { 57f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall private: 58f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool IsInt; 59f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 60f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall public: 61f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt IntReal, IntImag; 62f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat FloatReal, FloatImag; 63f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 64f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue() : FloatReal(APFloat::Bogus), FloatImag(APFloat::Bogus) {} 65f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 66f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall void makeComplexFloat() { IsInt = false; } 67f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool isComplexFloat() const { return !IsInt; } 68f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat &getComplexFloatReal() { return FloatReal; } 69f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat &getComplexFloatImag() { return FloatImag; } 70f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 71f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall void makeComplexInt() { IsInt = true; } 72f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool isComplexInt() const { return IsInt; } 73f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt &getComplexIntReal() { return IntReal; } 74f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt &getComplexIntImag() { return IntImag; } 75f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall 76f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall void moveInto(APValue &v) { 77f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (isComplexFloat()) 78f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall v = APValue(FloatReal, FloatImag); 79f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall else 80f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall v = APValue(IntReal, IntImag); 81f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall } 82f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall }; 83efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 84efdb83e26f9a1fd2566afe54461216cd84814d42John McCall struct LValue { 85efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Expr *Base; 86efdb83e26f9a1fd2566afe54461216cd84814d42John McCall CharUnits Offset; 87efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 88efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Expr *getLValueBase() { return Base; } 89efdb83e26f9a1fd2566afe54461216cd84814d42John McCall CharUnits getLValueOffset() { return Offset; } 90efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 91efdb83e26f9a1fd2566afe54461216cd84814d42John McCall void moveInto(APValue &v) { 92efdb83e26f9a1fd2566afe54461216cd84814d42John McCall v = APValue(Base, Offset); 93efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 94efdb83e26f9a1fd2566afe54461216cd84814d42John McCall }; 95f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall} 9687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner 97efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluateLValue(const Expr *E, LValue &Result, EvalInfo &Info); 98efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluatePointer(const Expr *E, LValue &Result, EvalInfo &Info); 9987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattnerstatic bool EvaluateInteger(const Expr *E, APSInt &Result, EvalInfo &Info); 100d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattnerstatic bool EvaluateIntegerOrLValue(const Expr *E, APValue &Result, 101d9becd1846e2c72bf6ad283faa1b048f33dd3afeChris Lattner EvalInfo &Info); 102d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr *E, APFloat &Result, EvalInfo &Info); 103f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallstatic bool EvaluateComplex(const Expr *E, ComplexValue &Res, EvalInfo &Info); 104f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 105f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1064efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// Misc utilities 1074efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 1084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 109e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnarastatic bool IsGlobalLValue(const Expr* E) { 11042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!E) return true; 11142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 11242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 11342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (isa<FunctionDecl>(DRE->getDecl())) 11442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 11542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) 11642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return VD->hasGlobalStorage(); 11742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 11842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } 11942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 12042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const CompoundLiteralExpr *CLE = dyn_cast<CompoundLiteralExpr>(E)) 12142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return CLE->isFileScope(); 12242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 12342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 12442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 12542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 126efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvalPointerValueAsBool(LValue& Value, bool& Result) { 127efdb83e26f9a1fd2566afe54461216cd84814d42John McCall const Expr* Base = Value.Base; 128a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1293554283157190e67918fad4221a5e6faf9317362John McCall // A null base expression indicates a null pointer. These are always 1303554283157190e67918fad4221a5e6faf9317362John McCall // evaluatable, and they are false unless the offset is zero. 1313554283157190e67918fad4221a5e6faf9317362John McCall if (!Base) { 1323554283157190e67918fad4221a5e6faf9317362John McCall Result = !Value.Offset.isZero(); 1333554283157190e67918fad4221a5e6faf9317362John McCall return true; 1343554283157190e67918fad4221a5e6faf9317362John McCall } 1353554283157190e67918fad4221a5e6faf9317362John McCall 13642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // Require the base expression to be a global l-value. 137e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (!IsGlobalLValue(Base)) return false; 13842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 1393554283157190e67918fad4221a5e6faf9317362John McCall // We have a non-null base expression. These are generally known to 1403554283157190e67918fad4221a5e6faf9317362John McCall // be true, but if it'a decl-ref to a weak symbol it can be null at 1413554283157190e67918fad4221a5e6faf9317362John McCall // runtime. 1423554283157190e67918fad4221a5e6faf9317362John McCall Result = true; 143a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1443554283157190e67918fad4221a5e6faf9317362John McCall const DeclRefExpr* DeclRef = dyn_cast<DeclRefExpr>(Base); 145a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola if (!DeclRef) 146a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola return true; 147a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1483554283157190e67918fad4221a5e6faf9317362John McCall // If it's a weak symbol, it isn't constant-evaluable. 149a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola const ValueDecl* Decl = DeclRef->getDecl(); 150a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola if (Decl->hasAttr<WeakAttr>() || 151a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola Decl->hasAttr<WeakRefAttr>() || 152a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola Decl->hasAttr<WeakImportAttr>()) 153a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola return false; 154a7d3c04fcfe9d4af2f7758f46aef26b1a8f8ac09Rafael Espindola 1555bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return true; 1565bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman} 1575bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman 158cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCallstatic bool HandleConversionToBool(const Expr* E, bool& Result, 159cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalInfo &Info) { 1602ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (E->getType()->isIntegralOrEnumerationType()) { 1614efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 1624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateInteger(E, IntResult, Info)) 1634efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = IntResult != 0; 1654efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 1664efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else if (E->getType()->isRealFloatingType()) { 1674efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APFloat FloatResult(0.0); 1684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluateFloat(E, FloatResult, Info)) 1694efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1704efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = !FloatResult.isZero(); 1714efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 172a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->hasPointerRepresentation()) { 173efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue PointerResult; 1744efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!EvaluatePointer(E, PointerResult, Info)) 1754efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1765bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return EvalPointerValueAsBool(PointerResult, Result); 177a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else if (E->getType()->isAnyComplexType()) { 178f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue ComplexResult; 179a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (!EvaluateComplex(E, ComplexResult, Info)) 180a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return false; 181a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman if (ComplexResult.isComplexFloat()) { 182a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = !ComplexResult.getComplexFloatReal().isZero() || 183a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman !ComplexResult.getComplexFloatImag().isZero(); 184a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } else { 185a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman Result = ComplexResult.getComplexIntReal().getBoolValue() || 186a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman ComplexResult.getComplexIntImag().getBoolValue(); 187a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman } 188a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman return true; 1894efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 1904efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1914efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1924efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 1934efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleFloatToIntCast(QualType DestType, QualType SrcType, 195a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat &Value, ASTContext &Ctx) { 196a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 197a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Determine whether we are converting to unsigned or signed. 198a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool DestSigned = DestType->isSignedIntegerType(); 1991eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 200a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // FIXME: Warning for overflow. 201a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar uint64_t Space[4]; 202a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 203a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar (void)Value.convertToInteger(Space, DestWidth, DestSigned, 204a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar llvm::APFloat::rmTowardZero, &ignored); 205a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return APSInt(llvm::APInt(DestWidth, 4, Space), !DestSigned); 206a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 207a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 2081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleFloatToFloatCast(QualType DestType, QualType SrcType, 209a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat &Value, ASTContext &Ctx) { 210a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool ignored; 211a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result = Value; 2121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.convert(Ctx.getFloatTypeSemantics(DestType), 213a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven, &ignored); 214a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 215a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 216a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 2171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APSInt HandleIntToIntCast(QualType DestType, QualType SrcType, 218a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt &Value, ASTContext &Ctx) { 219a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar unsigned DestWidth = Ctx.getIntWidth(DestType); 220a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt Result = Value; 221a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // Figure out if this is a truncate, extend or noop cast. 222a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar // If the input is signed, do a sign extend, noop, or truncate. 2239f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Result = Result.extOrTrunc(DestWidth); 224a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.setIsUnsigned(DestType->isUnsignedIntegerType()); 225a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 226a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 227a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 2281eb4433ac451dc16f4133a88af2d002ac26c58efMike Stumpstatic APFloat HandleIntToFloatCast(QualType DestType, QualType SrcType, 229a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APSInt &Value, ASTContext &Ctx) { 230a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 231a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat Result(Ctx.getFloatTypeSemantics(DestType), 1); 232a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result.convertFromAPInt(Value, Value.isSigned(), 233a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar APFloat::rmNearestTiesToEven); 234a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar return Result; 235a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar} 236a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 237c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumpnamespace { 238770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass HasSideEffect 239c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump : public StmtVisitor<HasSideEffect, bool> { 240c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump EvalInfo &Info; 241c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stumppublic: 242c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 243c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump HasSideEffect(EvalInfo &info) : Info(info) {} 244c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 245c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // Unhandled nodes conservatively default to having side effects. 246c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitStmt(Stmt *S) { 247c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 248c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 249c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 250c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 251c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitDeclRefExpr(DeclRefExpr *E) { 252df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (Info.Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 253c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 254c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return false; 255c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 256c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // We don't want to evaluate BlockExprs multiple times, as they generate 257c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump // a ton of code. 258c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitBlockExpr(BlockExpr *E) { return true; } 259c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitPredefinedExpr(PredefinedExpr *E) { return false; } 260c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitCompoundLiteralExpr(CompoundLiteralExpr *E) 261c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump { return Visit(E->getInitializer()); } 262c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitMemberExpr(MemberExpr *E) { return Visit(E->getBase()); } 263c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitIntegerLiteral(IntegerLiteral *E) { return false; } 264c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitFloatingLiteral(FloatingLiteral *E) { return false; } 265c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitStringLiteral(StringLiteral *E) { return false; } 266c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitCharacterLiteral(CharacterLiteral *E) { return false; } 267c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *E) { return false; } 268c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitArraySubscriptExpr(ArraySubscriptExpr *E) 269980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 270c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitChooseExpr(ChooseExpr *E) 271c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump { return Visit(E->getChosenSubExpr(Info.Ctx)); } 272c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitCastExpr(CastExpr *E) { return Visit(E->getSubExpr()); } 273c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitBinAssign(BinaryOperator *E) { return true; } 2743f0147e161df4725ff15fbb731f4f727afcc229fMike Stump bool VisitCompoundAssignOperator(BinaryOperator *E) { return true; } 275980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump bool VisitBinaryOperator(BinaryOperator *E) 276980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump { return Visit(E->getLHS()) || Visit(E->getRHS()); } 277c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPreInc(UnaryOperator *E) { return true; } 278c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPostInc(UnaryOperator *E) { return true; } 279c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPreDec(UnaryOperator *E) { return true; } 280c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryPostDec(UnaryOperator *E) { return true; } 281c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryDeref(UnaryOperator *E) { 282df317bf71653eeb235da8337b1e8e790f9653aa4Mike Stump if (Info.Ctx.getCanonicalType(E->getType()).isVolatileQualified()) 283c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump return true; 284980ca220848d27ef55ef4c2d37423461a8ed0da3Mike Stump return Visit(E->getSubExpr()); 285c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump } 286c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump bool VisitUnaryOperator(UnaryOperator *E) { return Visit(E->getSubExpr()); } 287363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner 288363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner // Has side effects if any element does. 289363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner bool VisitInitListExpr(InitListExpr *E) { 290363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner for (unsigned i = 0, e = E->getNumInits(); i != e; ++i) 291363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner if (Visit(E->getInit(i))) return true; 292363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner return false; 293363ff23cfddb51abe4ee4212a6dd3c9b534fcc8bChris Lattner } 294c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump}; 295c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 296c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump} // end anonymous namespace 297c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 2984efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 2994efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman// LValue Evaluation 3004efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 3014efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmannamespace { 302770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass LValueExprEvaluator 303efdb83e26f9a1fd2566afe54461216cd84814d42John McCall : public StmtVisitor<LValueExprEvaluator, bool> { 3044efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman EvalInfo &Info; 305efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue &Result; 306efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 307efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool Success(Expr *E) { 308efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = E; 309efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::Zero(); 310efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 311efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 3124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanpublic: 3131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 314efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValueExprEvaluator(EvalInfo &info, LValue &Result) : 315efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Info(info), Result(Result) {} 3164efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 317efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitStmt(Stmt *S) { 318efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 3194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3208ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 321efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 322efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitDeclRefExpr(DeclRefExpr *E); 323efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitPredefinedExpr(PredefinedExpr *E) { return Success(E); } 324efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitCompoundLiteralExpr(CompoundLiteralExpr *E); 325efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitMemberExpr(MemberExpr *E); 326efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitStringLiteral(StringLiteral *E) { return Success(E); } 327efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitObjCEncodeExpr(ObjCEncodeExpr *E) { return Success(E); } 328efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitArraySubscriptExpr(ArraySubscriptExpr *E); 329efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitUnaryDeref(UnaryOperator *E); 330efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitUnaryExtension(const UnaryOperator *E) 331ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 332efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitChooseExpr(const ChooseExpr *E) 333ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 33426bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson 335efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitCastExpr(CastExpr *E) { 33626bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson switch (E->getCastKind()) { 33726bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson default: 338efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 33926bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson 3402de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_NoOp: 34126bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson return Visit(E->getSubExpr()); 34226bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 34326bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 344ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: __real__, __imag__ 3454efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman}; 3464efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} // end anonymous namespace 3474efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 348efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluateLValue(const Expr* E, LValue& Result, EvalInfo &Info) { 349efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return LValueExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 3504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 3514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 352efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool LValueExprEvaluator::VisitDeclRefExpr(DeclRefExpr *E) { 35350c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (isa<FunctionDecl>(E->getDecl())) { 354efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 35550c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } else if (VarDecl* VD = dyn_cast<VarDecl>(E->getDecl())) { 35650c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (!VD->getType()->isReferenceType()) 357efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 358761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth // Reference parameters can refer to anything even if they have an 359761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth // "initializer" in the form of a default argument. 360761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth if (isa<ParmVarDecl>(VD)) 361761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth return false; 362d933a0198f3ccce9c73bf2951625315b911d37bfEli Friedman // FIXME: Check whether VD might be overridden! 36331310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl if (const Expr *Init = VD->getAnyInitializer()) 364cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor return Visit(const_cast<Expr *>(Init)); 36550c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } 36650c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman 367efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 36835873c49adad211ff466e34342a52665742794f5Anders Carlsson} 36935873c49adad211ff466e34342a52665742794f5Anders Carlsson 370efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool LValueExprEvaluator::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 371efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 3724efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 3734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 374efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool LValueExprEvaluator::VisitMemberExpr(MemberExpr *E) { 3754efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman QualType Ty; 3764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->isArrow()) { 377efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(E->getBase(), Result, Info)) 378efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 3796217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek Ty = E->getBase()->getType()->getAs<PointerType>()->getPointeeType(); 3804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else { 381efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!Visit(E->getBase())) 382efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 3834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Ty = E->getBase()->getType(); 3844efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3866217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *RD = Ty->getAs<RecordType>()->getDecl(); 3874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 38886f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 38986f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor FieldDecl *FD = dyn_cast<FieldDecl>(E->getMemberDecl()); 39086f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (!FD) // FIXME: deal with other kinds of member expressions 391efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 3922be586108bb401019647791feca19ea03fd477ceEli Friedman 3932be586108bb401019647791feca19ea03fd477ceEli Friedman if (FD->getType()->isReferenceType()) 394efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 3952be586108bb401019647791feca19ea03fd477ceEli Friedman 3964efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // FIXME: This is linear time. 39744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor unsigned i = 0; 39817945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = RD->field_begin(), 39917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = RD->field_end(); 40044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; (void)++Field, ++i) { 40144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (*Field == FD) 4024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman break; 4034efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 4044efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 405efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset += CharUnits::fromQuantity(RL.getFieldOffset(i) / 8); 406efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 4074efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 4084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 409efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool LValueExprEvaluator::VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 4103068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getBase(), Result, Info)) 411efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 4121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4133068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APSInt Index; 4143068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluateInteger(E->getIdx(), Index, Info)) 415efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 4163068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 417199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck CharUnits ElementSize = Info.Ctx.getTypeSizeInChars(E->getType()); 418efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset += Index.getSExtValue() * ElementSize; 419efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 4203068d117951a8df54bae9db039b56201ab10962bAnders Carlsson} 4214efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 422efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool LValueExprEvaluator::VisitUnaryDeref(UnaryOperator *E) { 423efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluatePointer(E->getSubExpr(), Result, Info); 424e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman} 425e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman 4264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 427f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Pointer Evaluation 428f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 429f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 430c754aa62643e66ab967ca32ae8b0b3fc419bba25Anders Carlssonnamespace { 431770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass PointerExprEvaluator 432efdb83e26f9a1fd2566afe54461216cd84814d42John McCall : public StmtVisitor<PointerExprEvaluator, bool> { 43387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 434efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue &Result; 435efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 436efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool Success(Expr *E) { 437efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = E; 438efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::Zero(); 439efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 440efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 4412bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonpublic: 4421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 443efdb83e26f9a1fd2566afe54461216cd84814d42John McCall PointerExprEvaluator(EvalInfo &info, LValue &Result) 444efdb83e26f9a1fd2566afe54461216cd84814d42John McCall : Info(info), Result(Result) {} 445f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 446efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitStmt(Stmt *S) { 447efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 4482bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 4492bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 450efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 4512bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 452efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitBinaryOperator(const BinaryOperator *E); 453efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitCastExpr(CastExpr* E); 454efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitUnaryExtension(const UnaryOperator *E) 4552217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman { return Visit(E->getSubExpr()); } 456efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitUnaryAddrOf(const UnaryOperator *E); 457efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitObjCStringLiteral(ObjCStringLiteral *E) 458efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success(E); } 459efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitAddrLabelExpr(AddrLabelExpr *E) 460efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success(E); } 461efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitCallExpr(CallExpr *E); 462efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitBlockExpr(BlockExpr *E) { 463b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump if (!E->hasBlockDeclRefExprs()) 464efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 465efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 466b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump } 467efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) 468efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success((Expr*)0); } 469efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitConditionalOperator(ConditionalOperator *E); 470efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitChooseExpr(ChooseExpr *E) 4716e8ed16ffef02b82995a90bdcf10ffff7d63839aSebastian Redl { return Visit(E->getChosenSubExpr(Info.Ctx)); } 472efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) 473efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success((Expr*)0); } 474ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: @protocol, @selector 4752bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson}; 476f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 4772bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 478efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluatePointer(const Expr* E, LValue& Result, EvalInfo &Info) { 4797db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall assert(E->getType()->hasPointerRepresentation()); 480efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return PointerExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 481f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 482650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 483efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 4842de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() != BO_Add && 4852de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall E->getOpcode() != BO_Sub) 486efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 4871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 488650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *PExp = E->getLHS(); 489650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *IExp = E->getRHS(); 490650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (IExp->getType()->isPointerType()) 491f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner std::swap(PExp, IExp); 4921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 493efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(PExp, Result, Info)) 494efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 4951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 496efdb83e26f9a1fd2566afe54461216cd84814d42John McCall llvm::APSInt Offset; 497efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateInteger(IExp, Offset, Info)) 498efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 499efdb83e26f9a1fd2566afe54461216cd84814d42John McCall int64_t AdditionalOffset 500efdb83e26f9a1fd2566afe54461216cd84814d42John McCall = Offset.isSigned() ? Offset.getSExtValue() 501efdb83e26f9a1fd2566afe54461216cd84814d42John McCall : static_cast<int64_t>(Offset.getZExtValue()); 502650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 503e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar // Compute the new offset in the appropriate width. 504e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar 505e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar QualType PointeeType = 506e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar PExp->getType()->getAs<PointerType>()->getPointeeType(); 507efdb83e26f9a1fd2566afe54461216cd84814d42John McCall CharUnits SizeOfPointee; 5081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5094d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson // Explicitly handle GNU void* and function pointer arithmetic extensions. 5104d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson if (PointeeType->isVoidType() || PointeeType->isFunctionType()) 511efdb83e26f9a1fd2566afe54461216cd84814d42John McCall SizeOfPointee = CharUnits::One(); 5124d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson else 513efdb83e26f9a1fd2566afe54461216cd84814d42John McCall SizeOfPointee = Info.Ctx.getTypeSizeInChars(PointeeType); 5144efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5152de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add) 516efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset += AdditionalOffset * SizeOfPointee; 517650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson else 518efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset -= AdditionalOffset * SizeOfPointee; 5194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 520efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 521650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 5224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 523efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitUnaryAddrOf(const UnaryOperator *E) { 524efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluateLValue(E->getSubExpr(), Result, Info); 5254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 5261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 527650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 528efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitCastExpr(CastExpr* E) { 52909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman Expr* SubExpr = E->getSubExpr(); 530650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 53109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman switch (E->getCastKind()) { 53209a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman default: 53309a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 53409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 5352de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_NoOp: 5362de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_BitCast: 5372de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_LValueBitCast: 5382de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_AnyPointerToObjCPointerCast: 5392de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_AnyPointerToBlockPointerCast: 54009a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman return Visit(SubExpr); 54109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 5425c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson case CK_DerivedToBase: 5435c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson case CK_UncheckedDerivedToBase: { 5445c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson LValue BaseLV; 5455c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson if (!EvaluatePointer(E->getSubExpr(), BaseLV, Info)) 5465c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return false; 5475c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5485c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // Now figure out the necessary offset to add to the baseLV to get from 5495c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // the derived class to the base class. 5505c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson uint64_t Offset = 0; 5515c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5525c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson QualType Ty = E->getSubExpr()->getType(); 5535c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXRecordDecl *DerivedDecl = 5545c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson Ty->getAs<PointerType>()->getPointeeType()->getAsCXXRecordDecl(); 5555c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5565c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson for (CastExpr::path_const_iterator PathI = E->path_begin(), 5575c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson PathE = E->path_end(); PathI != PathE; ++PathI) { 5585c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXBaseSpecifier *Base = *PathI; 5595c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5605c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // FIXME: If the base is virtual, we'd need to determine the type of the 5615c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // most derived class and we don't support that right now. 5625c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson if (Base->isVirtual()) 5635c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return false; 5645c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5655c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXRecordDecl *BaseDecl = Base->getType()->getAsCXXRecordDecl(); 5665c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const ASTRecordLayout &Layout = Info.Ctx.getASTRecordLayout(DerivedDecl); 5675c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 568a14f5979572aa25c03d24750ee4724d2031d4edeAnders Carlsson Offset += Layout.getBaseClassOffsetInBits(BaseDecl); 5695c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson DerivedDecl = BaseDecl; 5705c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson } 5715c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5725c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson Result.Base = BaseLV.getLValueBase(); 5735c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson Result.Offset = BaseLV.getLValueOffset() + 5745c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson CharUnits::fromQuantity(Offset / Info.Ctx.getCharWidth()); 5755c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return true; 5765c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson } 5775c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 578404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall case CK_NullToPointer: { 579404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall Result.Base = 0; 580404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall Result.Offset = CharUnits::Zero(); 581404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall return true; 582404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall } 583404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall 5842de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_IntegralToPointer: { 585efdb83e26f9a1fd2566afe54461216cd84814d42John McCall APValue Value; 586efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateIntegerOrLValue(SubExpr, Value, Info)) 58709a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 58869ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 589efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (Value.isInt()) { 5909f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad Value.getInt() = Value.getInt().extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 591efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = 0; 592efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::fromQuantity(Value.getInt().getZExtValue()); 593efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 594efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else { 595efdb83e26f9a1fd2566afe54461216cd84814d42John McCall // Cast is of an lvalue, no need to change value. 596efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = Value.getLValueBase(); 597efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = Value.getLValueOffset(); 598efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 599650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 600650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 6012de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_ArrayToPointerDecay: 6022de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_FunctionToPointerDecay: 603efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluateLValue(SubExpr, Result, Info); 6044efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 6054efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 606efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 608650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 609efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitCallExpr(CallExpr *E) { 6101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (E->isBuiltinCall(Info.Ctx) == 6110d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Builtin::BI__builtin___CFStringMakeConstantString || 6120d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall E->isBuiltinCall(Info.Ctx) == 6130d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Builtin::BI__builtin___NSStringMakeConstantString) 614efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 615efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6163941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman} 6173941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman 618efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 6194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 6204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 621efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 6234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 624efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Visit(EvalExpr); 6254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 626f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 627f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 62859b5da6d853b4368b984700315adf7b37de05764Nate Begeman// Vector Evaluation 62959b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 63059b5da6d853b4368b984700315adf7b37de05764Nate Begeman 63159b5da6d853b4368b984700315adf7b37de05764Nate Begemannamespace { 632770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramer class VectorExprEvaluator 63359b5da6d853b4368b984700315adf7b37de05764Nate Begeman : public StmtVisitor<VectorExprEvaluator, APValue> { 63459b5da6d853b4368b984700315adf7b37de05764Nate Begeman EvalInfo &Info; 63591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue GetZeroVector(QualType VecType); 63659b5da6d853b4368b984700315adf7b37de05764Nate Begeman public: 6371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 63859b5da6d853b4368b984700315adf7b37de05764Nate Begeman VectorExprEvaluator(EvalInfo &info) : Info(info) {} 6391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 64059b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitStmt(Stmt *S) { 64159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 64259b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 6431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 64491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitParenExpr(ParenExpr *E) 64591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 64691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 64791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 64891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryPlus(const UnaryOperator *E) 64991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 65091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryReal(const UnaryOperator *E) 65191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 65291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) 65391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return GetZeroVector(E->getType()); } 65459b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCastExpr(const CastExpr* E); 65559b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 65659b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitInitListExpr(const InitListExpr *E); 65791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitConditionalOperator(const ConditionalOperator *E); 658ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 659ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 66091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryImag(const UnaryOperator *E); 66191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // FIXME: Missing: unary -, unary ~, binary add/sub/mul/div, 6622217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // binary comparisons, binary and/or/xor, 66391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // shufflevector, ExtVectorElementExpr 66491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // (Note that these require implementing conversions 66591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // between vector types.) 66659b5da6d853b4368b984700315adf7b37de05764Nate Begeman }; 66759b5da6d853b4368b984700315adf7b37de05764Nate Begeman} // end anonymous namespace 66859b5da6d853b4368b984700315adf7b37de05764Nate Begeman 66959b5da6d853b4368b984700315adf7b37de05764Nate Begemanstatic bool EvaluateVector(const Expr* E, APValue& Result, EvalInfo &Info) { 67059b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!E->getType()->isVectorType()) 67159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 67259b5da6d853b4368b984700315adf7b37de05764Nate Begeman Result = VectorExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 67359b5da6d853b4368b984700315adf7b37de05764Nate Begeman return !Result.isUninit(); 67459b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 67559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 67659b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue VectorExprEvaluator::VisitCastExpr(const CastExpr* E) { 677183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VTy = E->getType()->getAs<VectorType>(); 678c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman QualType EltTy = VTy->getElementType(); 679c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned NElts = VTy->getNumElements(); 680c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned EltWidth = Info.Ctx.getTypeSize(EltTy); 6811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 68259b5da6d853b4368b984700315adf7b37de05764Nate Begeman const Expr* SE = E->getSubExpr(); 683e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman QualType SETy = SE->getType(); 684e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APValue Result = APValue(); 68559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 686e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman // Check for vector->vector bitcast and scalar->vector splat. 687e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman if (SETy->isVectorType()) { 68859b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(SE)); 689e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isIntegerType()) { 690e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APSInt IntResult; 691d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateInteger(SE, IntResult, Info)) 692d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 693d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(IntResult); 694e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isRealFloatingType()) { 695e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APFloat F(0.0); 696d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateFloat(SE, F, Info)) 697d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 698d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(F); 699d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar } else 700c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 70159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 702c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to ExtVector, convert the scalar to the element type 703c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // and splat it to all elements. 704c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (E->getType()->isExtVectorType()) { 705c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType() && Result.isInt()) 706c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToIntCast(EltTy, SETy, Result.getInt(), 707c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 708c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isIntegerType()) 709c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToIntCast(EltTy, SETy, Result.getFloat(), 710c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 711c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType() && Result.isInt()) 712c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToFloatCast(EltTy, SETy, Result.getInt(), 713c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 714c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 715c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToFloatCast(EltTy, SETy, Result.getFloat(), 716c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 717c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 718c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 719c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 720c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // Splat and create vector APValue. 721c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts(NElts, Result); 722c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 723e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } 724c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 725c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to regular gcc-style vector type, bitcast the scalar 726c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // to the vector. To construct the APValue vector initializer, bitcast the 727c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // initializing value to an APInt, and shift out the bits pertaining to each 728c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // element. 729c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman APSInt Init; 730c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init = Result.isInt() ? Result.getInt() : Result.getFloat().bitcastToAPInt(); 7311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 732c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts; 733c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman for (unsigned i = 0; i != NElts; ++i) { 7349f71a8f4c7a182a5236da9e747d57cc1d1bd24c2Jay Foad APSInt Tmp = Init.extOrTrunc(EltWidth); 7351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 736c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType()) 737c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(Tmp)); 738c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 739c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(APFloat(Tmp))); 740c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 741c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 742c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 743c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init >>= EltWidth; 744c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman } 745c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 74659b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 74759b5da6d853b4368b984700315adf7b37de05764Nate Begeman 7481eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 74959b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 75059b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(E->getInitializer())); 75159b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 75259b5da6d853b4368b984700315adf7b37de05764Nate Begeman 7531eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 75459b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 755183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = E->getType()->getAs<VectorType>(); 75659b5da6d853b4368b984700315adf7b37de05764Nate Begeman unsigned NumInits = E->getNumInits(); 75791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman unsigned NumElements = VT->getNumElements(); 7581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 75959b5da6d853b4368b984700315adf7b37de05764Nate Begeman QualType EltTy = VT->getElementType(); 76059b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::SmallVector<APValue, 4> Elements; 76159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 762a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // If a vector is initialized with a single element, that value 763a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // becomes every element of the vector, not just the first. 764a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // This is the behavior described in the IBM AltiVec documentation. 765a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (NumInits == 1) { 766a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall APValue InitValue; 76759b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (EltTy->isIntegerType()) { 76859b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APSInt sInt(32); 769a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(0), sInt, Info)) 770a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 771a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(sInt); 77259b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else { 77359b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APFloat f(0.0); 774a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(0), f, Info)) 775a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 776a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(f); 777a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 778a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 779a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(InitValue); 780a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 781a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 782a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 783a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (EltTy->isIntegerType()) { 784a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APSInt sInt(32); 785a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 786a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(i), sInt, Info)) 787a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 788a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 789a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall sInt = Info.Ctx.MakeIntValue(0, EltTy); 790a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 791a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(sInt)); 79291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 793a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APFloat f(0.0); 794a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 795a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(i), f, Info)) 796a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 797a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 798a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall f = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy)); 799a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 800a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(f)); 80191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 80259b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 80359b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 80459b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(&Elements[0], Elements.size()); 80559b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 80659b5da6d853b4368b984700315adf7b37de05764Nate Begeman 8071eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 80891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanVectorExprEvaluator::GetZeroVector(QualType T) { 809183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = T->getAs<VectorType>(); 81091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman QualType EltTy = VT->getElementType(); 81191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue ZeroElement; 81291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EltTy->isIntegerType()) 81391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = APValue(Info.Ctx.MakeIntValue(0, EltTy)); 81491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman else 81591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = 81691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue(APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy))); 81791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 81891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman llvm::SmallVector<APValue, 4> Elements(VT->getNumElements(), ZeroElement); 81991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(&Elements[0], Elements.size()); 82091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 82191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 82291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 82391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman bool BoolResult; 82491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 82591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 82691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 82791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 82891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 82991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue Result; 83091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EvaluateVector(EvalExpr, Result, Info)) 83191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return Result; 83291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 83391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 83491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 83591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 83691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 83791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Info.EvalResult.HasSideEffects = true; 83891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return GetZeroVector(E->getType()); 83991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 84091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 84159b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 842f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Integer Evaluation 843f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 844f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 845f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnernamespace { 846770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass IntExprEvaluator 847b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner : public StmtVisitor<IntExprEvaluator, bool> { 84887eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 84930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue &Result; 850f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerpublic: 85130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar IntExprEvaluator(EvalInfo &info, APValue &result) 85287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner : Info(info), Result(result) {} 853f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 8543f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar bool Success(const llvm::APSInt &SI, const Expr *E) { 8552ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 8562ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 85730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.isSigned() == E->getType()->isSignedIntegerType() && 8583f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 85930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 8603f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 86130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(SI); 8623f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 8633f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 8643f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 865131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(const llvm::APInt &I, const Expr *E) { 8662ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 8672ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 86830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(I.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 8693f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 87030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(APSInt(I)); 87130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt().setIsUnsigned(E->getType()->isUnsignedIntegerType()); 872131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 873131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 874131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 875131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(uint64_t Value, const Expr *E) { 8762ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 8772ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 87830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(Info.Ctx.MakeIntValue(Value, E->getType())); 879131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 880131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 881131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 88282206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Error(SourceLocation L, diag::kind D, const Expr *E) { 88332fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // Take the first error. 88454da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson if (Info.EvalResult.Diag == 0) { 88554da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.DiagLoc = L; 88654da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.Diag = D; 88782206e267ce6cc709797127616f64672d255b310Anders Carlsson Info.EvalResult.DiagExpr = E; 88832fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 88954176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return false; 8907a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner } 8911eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 892f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 893f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner // Visitor Methods 894f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 8951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 89632fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitStmt(Stmt *) { 89732fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner assert(0 && "This should be called on integers, stmts are not integers"); 89832fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner return false; 89932fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 9001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 90132fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitExpr(Expr *E) { 9020e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 903f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner } 9041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 905b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 906f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 9074c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitIntegerLiteral(const IntegerLiteral *E) { 908131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 9094c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 9104c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCharacterLiteral(const CharacterLiteral *E) { 911131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 9124c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 913043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 914043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool CheckReferencedDecl(const Expr *E, const Decl *D); 915043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitDeclRefExpr(const DeclRefExpr *E) { 916043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return CheckReferencedDecl(E, E->getDecl()); 917043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 918043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitMemberExpr(const MemberExpr *E) { 919043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (CheckReferencedDecl(E, E->getMemberDecl())) { 920043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman // Conservatively assume a MemberExpr will have side-effects 921043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman Info.EvalResult.HasSideEffects = true; 922043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return true; 923043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 924043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return false; 925043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 926043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 927c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman bool VisitCallExpr(CallExpr *E); 928b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitBinaryOperator(const BinaryOperator *E); 9298ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor bool VisitOffsetOfExpr(const OffsetOfExpr *E); 930b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitUnaryOperator(const UnaryOperator *E); 931ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes bool VisitConditionalOperator(const ConditionalOperator *E); 932f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 933a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool VisitCastExpr(CastExpr* E); 9340518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl bool VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E); 9350518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 9363068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 937131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 9383068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 9391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9403f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson bool VisitGNUNullExpr(const GNUNullExpr *E) { 941131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 9423f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson } 9431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 944ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor bool VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E) { 945131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 9463068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 9473068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 948664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { 949664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 950664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman } 951664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 95264b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) { 9530dfd848fa4c9664852ba8c929a8bd3fce93ddca2Sebastian Redl return Success(E->getValue(), E); 95464b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl } 95564b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl 9566ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet bool VisitBinaryTypeTraitExpr(const BinaryTypeTraitExpr *E) { 9576ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet return Success(E->getValue(), E); 9586ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet } 9596ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet 960ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) { 961ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman return Visit(E->getChosenSubExpr(Info.Ctx)); 962ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman } 963ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 964722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman bool VisitUnaryReal(const UnaryOperator *E); 965664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitUnaryImag(const UnaryOperator *E); 966664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 967295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl bool VisitCXXNoexceptExpr(const CXXNoexceptExpr *E); 968295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl 969fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattnerprivate: 9708b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfExpr(const Expr *E); 9718b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfType(QualType T); 97242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall static QualType GetObjectType(const Expr *E); 97342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall bool TryEvaluateBuiltinObjectSize(CallExpr *E); 974664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman // FIXME: Missing: array subscript of vector, member of vector 975f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner}; 976f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 977f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 97869ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateIntegerOrLValue(const Expr* E, APValue &Result, EvalInfo &Info) { 9792ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType()); 98069ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return IntExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 98169ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar} 98269ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 98369ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateInteger(const Expr* E, APSInt &Result, EvalInfo &Info) { 9842ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType()); 9857db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall 98630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue Val; 98769ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (!EvaluateIntegerOrLValue(E, Val, Info) || !Val.isInt()) 98830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 98930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = Val.getInt(); 99030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return true; 991f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 992f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 993043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedmanbool IntExprEvaluator::CheckReferencedDecl(const Expr* E, const Decl* D) { 9944c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Enums are integer constant exprs. 99529a7f3342c3c6dd15d914c61ae22246c36d51ce7Eli Friedman if (const EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(D)) 99629a7f3342c3c6dd15d914c61ae22246c36d51ce7Eli Friedman return Success(ECD->getInitVal(), E); 997b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 998b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl // In C++, const, non-volatile integers initialized with ICEs are ICEs. 999e1646da3bb0fe97b372e5fe8cefc537b22048fc4Eli Friedman // In C, they can also be folded, although they are not ICEs. 1000cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor if (Info.Ctx.getCanonicalType(E->getType()).getCVRQualifiers() 1001cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor == Qualifiers::Const) { 1002f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson 1003f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson if (isa<ParmVarDecl>(D)) 1004f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1005f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson 1006043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 100731310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl if (const Expr *Init = VD->getAnyInitializer()) { 1008c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (APValue *V = VD->getEvaluatedValue()) { 1009c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (V->isInt()) 1010c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Success(V->getInt(), E); 1011c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1012c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman } 1013c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 1014c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (VD->isEvaluatingValue()) 1015c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1016c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 1017c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatingValue(); 1018c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 1019a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman Expr::EvalResult EResult; 1020a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman if (Init->Evaluate(EResult, Info.Ctx) && !EResult.HasSideEffects && 1021a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman EResult.Val.isInt()) { 102278d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor // Cache the evaluated value in the variable declaration. 1023a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman Result = EResult.Val; 1024c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatedValue(Result); 102578d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return true; 102678d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 102778d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor 1028c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatedValue(APValue()); 102978d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 1030b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 1031b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 1032b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 10334c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Otherwise, random variable references are not constants. 10340e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 10354c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 10364c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner 1037a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way 1038a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// as GCC. 1039a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattnerstatic int EvaluateBuiltinClassifyType(const CallExpr *E) { 1040a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // The following enum mimics the values returned by GCC. 10417c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl // FIXME: Does GCC differ between lvalue and rvalue references here? 1042a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enum gcc_type_class { 1043a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner no_type_class = -1, 1044a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner void_type_class, integer_type_class, char_type_class, 1045a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enumeral_type_class, boolean_type_class, 1046a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner pointer_type_class, reference_type_class, offset_type_class, 1047a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner real_type_class, complex_type_class, 1048a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner function_type_class, method_type_class, 1049a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner record_type_class, union_type_class, 1050a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner array_type_class, string_type_class, 1051a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner lang_type_class 1052a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner }; 10531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If no argument was supplied, default to "no_type_class". This isn't 1055a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // ideal, however it is what gcc does. 1056a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (E->getNumArgs() == 0) 1057a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return no_type_class; 10581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1059a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner QualType ArgTy = E->getArg(0)->getType(); 1060a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (ArgTy->isVoidType()) 1061a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return void_type_class; 1062a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isEnumeralType()) 1063a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return enumeral_type_class; 1064a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isBooleanType()) 1065a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return boolean_type_class; 1066a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isCharType()) 1067a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return string_type_class; // gcc doesn't appear to use char_type_class 1068a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isIntegerType()) 1069a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return integer_type_class; 1070a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isPointerType()) 1071a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return pointer_type_class; 1072a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isReferenceType()) 1073a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return reference_type_class; 1074a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isRealType()) 1075a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return real_type_class; 1076a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isComplexType()) 1077a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return complex_type_class; 1078a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isFunctionType()) 1079a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return function_type_class; 1080fb87b89fc9eb103e19fb8e4b925c23f0bd091b99Douglas Gregor else if (ArgTy->isStructureOrClassType()) 1081a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return record_type_class; 1082a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 1083a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 1084a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isArrayType()) 1085a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return array_type_class; 1086a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 1087a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 1088a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else // FIXME: offset_type_class, method_type_class, & lang_type_class? 1089a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner assert(0 && "CallExpr::isBuiltinClassifyType(): unimplemented type"); 1090a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return -1; 1091a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner} 1092a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 109342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// Retrieves the "underlying object type" of the given expression, 109442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// as used by __builtin_object_size. 109542c8f87eb60958170c46767273bf93e6c96125bfJohn McCallQualType IntExprEvaluator::GetObjectType(const Expr *E) { 109642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 109742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) 109842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return VD->getType(); 109942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } else if (isa<CompoundLiteralExpr>(E)) { 110042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return E->getType(); 110142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } 110242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 110342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return QualType(); 110442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 110542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 110642c8f87eb60958170c46767273bf93e6c96125bfJohn McCallbool IntExprEvaluator::TryEvaluateBuiltinObjectSize(CallExpr *E) { 110742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // TODO: Perhaps we should let LLVM lower this? 110842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall LValue Base; 110942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!EvaluatePointer(E->getArg(0), Base, Info)) 111042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 111142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 111242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // If we can prove the base is null, lower to zero now. 111342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall const Expr *LVBase = Base.getLValueBase(); 111442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!LVBase) return Success(0, E); 111542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 111642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall QualType T = GetObjectType(LVBase); 111742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (T.isNull() || 111842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isIncompleteType() || 11191357869bc5983cdfbc986db1f3d18265bb34cb0eEli Friedman T->isFunctionType() || 112042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isVariablyModifiedType() || 112142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isDependentType()) 112242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 112342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 112442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Size = Info.Ctx.getTypeSizeInChars(T); 112542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Offset = Base.getLValueOffset(); 112642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 112742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!Offset.isNegative() && Offset <= Size) 112842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size -= Offset; 112942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall else 113042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size = CharUnits::Zero(); 113142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return Success(Size.getQuantity(), E); 113242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 113342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 1134c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedmanbool IntExprEvaluator::VisitCallExpr(CallExpr *E) { 11353c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 1136019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner default: 11370e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 113864eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 113964eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump case Builtin::BI__builtin_object_size: { 114042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (TryEvaluateBuiltinObjectSize(E)) 114142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 114264eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 1143b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // If evaluating the argument has side-effects we can't determine 1144b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // the size of the object and lower it to unknown now. 1145393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (E->getArg(0)->HasSideEffects(Info.Ctx)) { 11463f27b384801de26ce7efaa395699b42719372f24Benjamin Kramer if (E->getArg(1)->EvaluateAsInt(Info.Ctx).getZExtValue() <= 1) 1147cf184655319cf7a5b811067cff9d26a5741fd161Chris Lattner return Success(-1ULL, E); 114864eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Success(0, E); 114964eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 1150c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 115164eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 115264eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 115364eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 1154019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_classify_type: 1155131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(EvaluateBuiltinClassifyType(E), E); 11561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11574bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson case Builtin::BI__builtin_constant_p: 1158019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // __builtin_constant_p always has one operand: it returns true if that 1159019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // operand can be folded, false otherwise. 1160131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getArg(0)->isEvaluatable(Info.Ctx), E); 116121fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner 116221fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner case Builtin::BI__builtin_eh_return_data_regno: { 116321fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner int Operand = E->getArg(0)->EvaluateAsInt(Info.Ctx).getZExtValue(); 116421fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner Operand = Info.Ctx.Target.getEHDataRegisterNumber(Operand); 116521fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner return Success(Operand, E); 116621fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner } 1167c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman 1168c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman case Builtin::BI__builtin_expect: 1169c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman return Visit(E->getArg(0)); 11705726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 11715726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor case Builtin::BIstrlen: 11725726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor case Builtin::BI__builtin_strlen: 11735726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // As an extension, we support strlen() and __builtin_strlen() as constant 11745726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // expressions when the argument is a string literal. 11755726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor if (StringLiteral *S 11765726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor = dyn_cast<StringLiteral>(E->getArg(0)->IgnoreParenImpCasts())) { 11775726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // The string literal may have embedded null characters. Find the first 11785726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // one and truncate there. 11795726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor llvm::StringRef Str = S->getString(); 11805726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor llvm::StringRef::size_type Pos = Str.find(0); 11815726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor if (Pos != llvm::StringRef::npos) 11825726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor Str = Str.substr(0, Pos); 11835726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 11845726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor return Success(Str.size(), E); 11855726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor } 11865726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 11875726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1188019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 11894c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 1190f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 1191b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 11922de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Comma) { 1193027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson if (!Visit(E->getRHS())) 1194027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return false; 11954fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson 119633ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // If we can't evaluate the LHS, it might have side effects; 119733ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // conservatively mark it. 119833ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 119933ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman Info.EvalResult.HasSideEffects = true; 1200c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner 1201027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return true; 1202a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1203a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1204a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->isLogicalOp()) { 1205a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // These need to be handled specially because the operands aren't 1206a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // necessarily integral 1207fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool lhsResult, rhsResult; 12081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1209fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getLHS(), lhsResult, Info)) { 121051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // We were able to evaluate the LHS, see if we can get away with not 121151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // evaluating the RHS: 0 && X -> 0, 1 || X -> 1 12122de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (lhsResult == (E->getOpcode() == BO_LOr)) 12133f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(lhsResult, E); 1214a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1215fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 12162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_LOr) 1217131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult || rhsResult, E); 12184bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson else 1219131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult && rhsResult, E); 12204bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 12214bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } else { 1222fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 12234bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // We can't evaluate the LHS; however, sometimes the result 12244bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // is determined by the RHS: X && 0 -> 0, X || 1 -> 1. 12252de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (rhsResult == (E->getOpcode() == BO_LOr) || 12262de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall !rhsResult == (E->getOpcode() == BO_LAnd)) { 1227131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // Since we weren't able to evaluate the left hand side, it 1228fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // must have had side effects. 1229fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson Info.EvalResult.HasSideEffects = true; 1230131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 1231131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(rhsResult, E); 12324bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 12334bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 1234a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1235a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1236a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1237c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner } 123854176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 1239286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType LHSTy = E->getLHS()->getType(); 1240286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType RHSTy = E->getRHS()->getType(); 12414087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12424087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHSTy->isAnyComplexType()) { 12434087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar assert(RHSTy->isAnyComplexType() && "Invalid comparison"); 1244f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS, RHS; 12454087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12464087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getLHS(), LHS, Info)) 12474087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 12484087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12494087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 12504087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 12514087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12524087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHS.isComplexFloat()) { 12531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_r = 12544087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatReal().compare(RHS.getComplexFloatReal()); 12551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_i = 12564087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatImag().compare(RHS.getComplexFloatImag()); 12574087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12582de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) 1259131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((CR_r == APFloat::cmpEqual && 1260131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpEqual), E); 1261131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 12622de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(E->getOpcode() == BO_NE && 1263131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid complex comparison."); 12641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(((CR_r == APFloat::cmpGreaterThan || 1265fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpLessThan || 1266fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpUnordered) || 12671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (CR_i == APFloat::cmpGreaterThan || 1268fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpLessThan || 1269fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpUnordered)), E); 1270131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 12714087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } else { 12722de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) 1273131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() == RHS.getComplexIntReal() && 1274131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() == RHS.getComplexIntImag()), E); 1275131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 12762de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(E->getOpcode() == BO_NE && 1277131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid compex comparison."); 1278131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() != RHS.getComplexIntReal() || 1279131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() != RHS.getComplexIntImag()), E); 1280131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 12814087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 12824087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 12831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1284286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (LHSTy->isRealFloatingType() && 1285286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson RHSTy->isRealFloatingType()) { 1286286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat RHS(0.0), LHS(0.0); 12871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1288286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1289286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 12901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1291286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getLHS(), LHS, Info)) 1292286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 12931eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1294286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat::cmpResult CR = LHS.compare(RHS); 1295529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson 1296286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson switch (E->getOpcode()) { 1297286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson default: 1298286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson assert(0 && "Invalid binary operator!"); 12992de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: 1300131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan, E); 13012de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: 1302131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan, E); 13032de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: 1304131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan || CR == APFloat::cmpEqual, E); 13052de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: 13061eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan || CR == APFloat::cmpEqual, 1307131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 13082de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: 1309131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpEqual, E); 13102de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: 13111eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan 1312fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpLessThan 1313fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpUnordered, E); 1314286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 1315286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 13161eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1317ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (LHSTy->isPointerType() && RHSTy->isPointerType()) { 13182de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Sub || E->isEqualityOp()) { 1319efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LHSValue; 13203068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getLHS(), LHSValue, Info)) 13213068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1322a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1323efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue RHSValue; 13243068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getRHS(), RHSValue, Info)) 13253068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1326a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 13275bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // Reject any bases from the normal codepath; we special-case comparisons 13285bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // to null. 13295bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (LHSValue.getLValueBase()) { 13305bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 13315bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 1332a73058324197b7bdfd19307965954f626e26199dKen Dyck if (RHSValue.getLValueBase() || !RHSValue.getLValueOffset().isZero()) 13335bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13345bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 13355bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(LHSValue, bres)) 13365bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13372de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall return Success(bres ^ (E->getOpcode() == BO_EQ), E); 13385bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } else if (RHSValue.getLValueBase()) { 13395bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 13405bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 1341a73058324197b7bdfd19307965954f626e26199dKen Dyck if (LHSValue.getLValueBase() || !LHSValue.getLValueOffset().isZero()) 13425bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13435bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 13445bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(RHSValue, bres)) 13455bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13462de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall return Success(bres ^ (E->getOpcode() == BO_EQ), E); 13475bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } 1348a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 13492de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Sub) { 13504992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType Type = E->getLHS()->getType(); 13514992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType ElementType = Type->getAs<PointerType>()->getPointeeType(); 13523068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 1353a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits ElementSize = CharUnits::One(); 1354ce1bca73aef9bbf6359ab8420278203dda81a054Eli Friedman if (!ElementType->isVoidType() && !ElementType->isFunctionType()) 1355a73058324197b7bdfd19307965954f626e26199dKen Dyck ElementSize = Info.Ctx.getTypeSizeInChars(ElementType); 1356a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1357a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Diff = LHSValue.getLValueOffset() - 1358a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSValue.getLValueOffset(); 1359a73058324197b7bdfd19307965954f626e26199dKen Dyck return Success(Diff / ElementSize, E); 1360ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1361ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman bool Result; 13622de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) { 1363ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() == RHSValue.getLValueOffset(); 1364267c0ab1b9a15768f3f15abbfc40ce344751c78bEli Friedman } else { 1365ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() != RHSValue.getLValueOffset(); 1366ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1367ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman return Success(Result, E); 13683068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 13693068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 13702ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!LHSTy->isIntegralOrEnumerationType() || 13712ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor !RHSTy->isIntegralOrEnumerationType()) { 1372a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // We can't continue from here for non-integral types, and they 1373a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // could potentially confuse the following operations. 1374a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1375a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1376a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1377a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // The LHS of a constant expr is always evaluated and needed. 137830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Visit(E->getLHS())) 1379a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; // error in subexpression. 1380d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman 138142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APValue RHSVal; 138242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!EvaluateIntegerOrLValue(E->getRHS(), RHSVal, Info)) 138330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 138442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 138542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like (unsigned long)&a + 4. 138642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->isAdditiveOp() && Result.isLValue() && RHSVal.isInt()) { 1387a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Offset = Result.getLValueOffset(); 1388a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits AdditionalOffset = CharUnits::fromQuantity( 1389a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSVal.getInt().getZExtValue()); 13902de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add) 1391a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset += AdditionalOffset; 139242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman else 1393a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset -= AdditionalOffset; 1394a73058324197b7bdfd19307965954f626e26199dKen Dyck Result = APValue(Result.getLValueBase(), Offset); 139542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 139642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 139742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 139842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like 4 + (unsigned long)&a 13992de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add && 140042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman RHSVal.isLValue() && Result.isInt()) { 1401a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Offset = RHSVal.getLValueOffset(); 1402a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset += CharUnits::fromQuantity(Result.getInt().getZExtValue()); 1403a73058324197b7bdfd19307965954f626e26199dKen Dyck Result = APValue(RHSVal.getLValueBase(), Offset); 140442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 140542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 140642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 140742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // All the following cases expect both operands to be an integer 140842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!Result.isInt() || !RHSVal.isInt()) 1409b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1410a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 141142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APSInt& RHS = RHSVal.getInt(); 141242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 1413a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson switch (E->getOpcode()) { 141432fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner default: 14150e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 14162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: return Success(Result.getInt() * RHS, E); 14172de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: return Success(Result.getInt() + RHS, E); 14182de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: return Success(Result.getInt() - RHS, E); 14192de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_And: return Success(Result.getInt() & RHS, E); 14202de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Xor: return Success(Result.getInt() ^ RHS, E); 14212de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Or: return Success(Result.getInt() | RHS, E); 14222de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 142354176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 14240e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 142530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() / RHS, E); 14262de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Rem: 142754176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 14280e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 142930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() % RHS, E); 14302de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shl: { 1431091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall // During constant-folding, a negative shift is an opposite shift. 1432091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall if (RHS.isSigned() && RHS.isNegative()) { 1433091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall RHS = -RHS; 1434091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall goto shift_right; 1435091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall } 1436091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall 1437091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall shift_left: 1438091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall unsigned SA 1439091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall = (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 144030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() << SA, E); 14413f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 14422de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shr: { 1443091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall // During constant-folding, a negative shift is an opposite shift. 1444091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall if (RHS.isSigned() && RHS.isNegative()) { 1445091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall RHS = -RHS; 1446091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall goto shift_left; 1447091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall } 1448091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall 1449091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall shift_right: 14501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 145130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 145230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() >> SA, E); 14533f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 14541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14552de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: return Success(Result.getInt() < RHS, E); 14562de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: return Success(Result.getInt() > RHS, E); 14572de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: return Success(Result.getInt() <= RHS, E); 14582de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: return Success(Result.getInt() >= RHS, E); 14592de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: return Success(Result.getInt() == RHS, E); 14602de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: return Success(Result.getInt() != RHS, E); 1461b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 1462a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 1463a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 1464ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopesbool IntExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 1465a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes bool Cond; 1466a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes if (!HandleConversionToBool(E->getCond(), Cond, Info)) 1467ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes return false; 1468ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 1469a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 1470ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes} 1471ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 14728b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfType(QualType T) { 14735d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 14745d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 14755d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 14765d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 14775d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = T->getAs<ReferenceType>()) 14785d484e8cf710207010720589d89602233de61d01Sebastian Redl T = Ref->getPointeeType(); 14795d484e8cf710207010720589d89602233de61d01Sebastian Redl 1480e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the alignment. 1481e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner unsigned CharSize = Info.Ctx.Target.getCharWidth(); 148218857644059c45da6776f1a288eec7b4cf3a844aDouglas Gregor 14832be586108bb401019647791feca19ea03fd477ceEli Friedman // __alignof is defined to return the preferred alignment. 14848b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return CharUnits::fromQuantity( 14858b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck Info.Ctx.getPreferredTypeAlign(T.getTypePtr()) / CharSize); 1486e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1487e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 14888b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfExpr(const Expr *E) { 1489af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner E = E->IgnoreParens(); 1490af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1491af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // alignof decl is always accepted, even if it doesn't make sense: we default 14921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // to 1 in those cases. 1493af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 14948b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(DRE->getDecl(), 14958b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 1496a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1497af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) 14988b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(ME->getMemberDecl(), 14998b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 1500af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1501e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(E->getType()); 1502e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1503e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1504e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 15050518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// VisitSizeAlignOfExpr - Evaluate a sizeof or alignof with a result as the 15060518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// expression's type. 15070518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redlbool IntExprEvaluator::VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E) { 1508e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Handle alignof separately. 1509e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!E->isSizeOf()) { 1510e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (E->isArgumentType()) 15118b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Success(GetAlignOfType(E->getArgumentType()).getQuantity(), E); 1512e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner else 15138b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Success(GetAlignOfExpr(E->getArgumentExpr()).getQuantity(), E); 1514e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner } 1515a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 15160518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType SrcTy = E->getTypeOfArgument(); 15175d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 15185d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 15195d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 15205d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 15215d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = SrcTy->getAs<ReferenceType>()) 15225d484e8cf710207010720589d89602233de61d01Sebastian Redl SrcTy = Ref->getPointeeType(); 15230518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 1524131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc 1525131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // extension. 1526131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar if (SrcTy->isVoidType() || SrcTy->isFunctionType()) 1527131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(1, E); 1528a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1529fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. 1530e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!SrcTy->isConstantSizeType()) 1531fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner return false; 1532f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 1533e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the size. 1534199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck return Success(Info.Ctx.getTypeSizeInChars(SrcTy).getQuantity(), E); 1535fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner} 1536fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 15378ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregorbool IntExprEvaluator::VisitOffsetOfExpr(const OffsetOfExpr *E) { 15388ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits Result; 15398ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor unsigned n = E->getNumComponents(); 15408ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor OffsetOfExpr* OOE = const_cast<OffsetOfExpr*>(E); 15418ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (n == 0) 15428ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15438ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor QualType CurrentType = E->getTypeSourceInfo()->getType(); 15448ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor for (unsigned i = 0; i != n; ++i) { 15458ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor OffsetOfExpr::OffsetOfNode ON = OOE->getComponent(i); 15468ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor switch (ON.getKind()) { 15478ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Array: { 15488ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Expr *Idx = OOE->getIndexExpr(ON.getArrayExprIndex()); 15498ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor APSInt IdxResult; 15508ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!EvaluateInteger(Idx, IdxResult, Info)) 15518ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15528ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ArrayType *AT = Info.Ctx.getAsArrayType(CurrentType); 15538ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!AT) 15548ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15558ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = AT->getElementType(); 15568ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits ElementSize = Info.Ctx.getTypeSizeInChars(CurrentType); 15578ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Result += IdxResult.getSExtValue() * ElementSize; 15588ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 15598ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 15608ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 15618ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Field: { 15628ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor FieldDecl *MemberDecl = ON.getField(); 15638ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 15648ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!RT) 15658ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15668ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor RecordDecl *RD = RT->getDecl(); 15678ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 15688ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor unsigned i = 0; 15698ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor // FIXME: It would be nice if we didn't have to loop here! 15708ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor for (RecordDecl::field_iterator Field = RD->field_begin(), 15718ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor FieldEnd = RD->field_end(); 15728ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Field != FieldEnd; (void)++Field, ++i) { 15738ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (*Field == MemberDecl) 15748ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 15758ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 1576cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor assert(i < RL.getFieldCount() && "offsetof field in wrong type"); 1577cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor Result += CharUnits::fromQuantity( 1578cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor RL.getFieldOffset(i) / Info.Ctx.getCharWidth()); 15798ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = MemberDecl->getType().getNonReferenceType(); 15808ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 15818ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 15828ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 15838ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Identifier: 15848ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor llvm_unreachable("dependent __builtin_offsetof"); 1585cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1586cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1587cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor case OffsetOfExpr::OffsetOfNode::Base: { 1588cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CXXBaseSpecifier *BaseSpec = ON.getBase(); 1589cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (BaseSpec->isVirtual()) 1590cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1591cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1592cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the layout of the class whose base we are looking into. 1593cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 1594cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (!RT) 1595cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1596cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor RecordDecl *RD = RT->getDecl(); 1597cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 1598cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1599cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the base class itself. 1600cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CurrentType = BaseSpec->getType(); 1601cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *BaseRT = CurrentType->getAs<RecordType>(); 1602cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (!BaseRT) 1603cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1604cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1605cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Add the offset to the base. 1606cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor Result += CharUnits::fromQuantity( 1607a14f5979572aa25c03d24750ee4724d2031d4edeAnders Carlsson RL.getBaseClassOffsetInBits(cast<CXXRecordDecl>(BaseRT->getDecl())) 1608cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor / Info.Ctx.getCharWidth()); 1609cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor break; 1610cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor } 16118ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 16128ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 16138ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return Success(Result.getQuantity(), E); 16148ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor} 16158ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 1616b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 16172de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == UO_LNot) { 1618a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // LNot's operand isn't necessarily an integer, so we handle it specially. 1619a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman bool bres; 1620a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!HandleConversionToBool(E->getSubExpr(), bres, Info)) 1621a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1622131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(!bres, E); 1623a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1624a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 16254fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar // Only handle integral operations... 16262ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!E->getSubExpr()->getType()->isIntegralOrEnumerationType()) 16274fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar return false; 16284fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar 162987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner // Get the operand value into 'Result'. 163087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!Visit(E->getSubExpr())) 163175a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner return false; 1632a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 163375a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner switch (E->getOpcode()) { 16344c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner default: 163575a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 163675a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // See C99 6.6p3. 16370e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 16382de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: 16394c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // FIXME: Should extension allow i-c-e extension expressions in its scope? 16404c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // If so, we could clear the diagnostic ID. 16413f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 16422de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 16431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // The result is always just the subexpr. 16443f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 16452de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 164630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 164730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(-Result.getInt(), E); 16482de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 164930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 165030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(~Result.getInt(), E); 165106a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson } 1652a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 16531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1654732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// HandleCast - This is used to evaluate implicit or explicit casts where the 1655732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// result type is integer. 1656a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarbool IntExprEvaluator::VisitCastExpr(CastExpr *E) { 165782206e267ce6cc709797127616f64672d255b310Anders Carlsson Expr *SubExpr = E->getSubExpr(); 165882206e267ce6cc709797127616f64672d255b310Anders Carlsson QualType DestType = E->getType(); 1659b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar QualType SrcType = SubExpr->getType(); 166082206e267ce6cc709797127616f64672d255b310Anders Carlsson 16614efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (DestType->isBooleanType()) { 16624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 16634efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(SubExpr, BoolResult, Info)) 16644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1665131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(BoolResult, E); 16664efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 16674efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1668a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson // Handle simple integer->integer casts. 16692ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (SrcType->isIntegralOrEnumerationType()) { 1670732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!Visit(SubExpr)) 1671b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1672a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1673be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!Result.isInt()) { 1674be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // Only allow casts of lvalues if they are lossless. 1675be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return Info.Ctx.getTypeSize(DestType) == Info.Ctx.getTypeSize(SrcType); 1676be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 167730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 1678dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, 167930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt(), Info.Ctx), E); 1680732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner } 16811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1682732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner // FIXME: Clean this up! 1683b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (SrcType->isPointerType()) { 1684efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 168587eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(SubExpr, LV, Info)) 1686b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 16874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1688dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (LV.getLValueBase()) { 1689dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar // Only allow based lvalue casts if they are lossless. 1690dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(SrcType)) 1691dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return false; 1692dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar 1693efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result); 1694dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return true; 1695dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar } 16964efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1697a73058324197b7bdfd19307965954f626e26199dKen Dyck APSInt AsInt = Info.Ctx.MakeIntValue(LV.getLValueOffset().getQuantity(), 1698a73058324197b7bdfd19307965954f626e26199dKen Dyck SrcType); 1699dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, AsInt, Info.Ctx), E); 17002bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 17014efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1702be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (SrcType->isArrayType() || SrcType->isFunctionType()) { 1703be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // This handles double-conversion cases, where there's both 1704be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // an l-value promotion and an implicit conversion to int. 1705efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 1706be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!EvaluateLValue(SubExpr, LV, Info)) 1707be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1708be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1709be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(Info.Ctx.VoidPtrTy)) 1710be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1711be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1712efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result); 1713be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return true; 1714be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 1715be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 17161725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (SrcType->isAnyComplexType()) { 1717f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue C; 17181725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (!EvaluateComplex(SubExpr, C, Info)) 17191725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return false; 17201725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (C.isComplexFloat()) 17211725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleFloatToIntCast(DestType, SrcType, 17221725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexFloatReal(), Info.Ctx), 17231725f683432715e5afe34d476024bd6f16eac3fcEli Friedman E); 17241725f683432715e5afe34d476024bd6f16eac3fcEli Friedman else 17251725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleIntToIntCast(DestType, SrcType, 17261725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexIntReal(), Info.Ctx), E); 17271725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 17282217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // FIXME: Handle vectors 17292217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1730b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (!SrcType->isRealFloatingType()) 17310e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1732732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 1733d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat F(0.0); 1734d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(SubExpr, F, Info)) 17350e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 17361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1737b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar return Success(HandleFloatToIntCast(DestType, SrcType, F, Info.Ctx), E); 1738a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 17392bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 1740722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedmanbool IntExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 1741722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 1742f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 1743722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1744722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1745722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntReal(), E); 1746722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1747722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1748722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Visit(E->getSubExpr()); 1749722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman} 1750722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1751664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedmanbool IntExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 1752722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isComplexIntegerType()) { 1753f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 1754722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1755722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1756722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntImag(), E); 1757722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1758722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1759664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 1760664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman Info.EvalResult.HasSideEffects = true; 1761664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 1762664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman} 1763664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 1764295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redlbool IntExprEvaluator::VisitCXXNoexceptExpr(const CXXNoexceptExpr *E) { 1765295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl return Success(E->getValue(), E); 1766295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl} 1767295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl 1768f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1769d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman// Float Evaluation 1770d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1771d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1772d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmannamespace { 1773770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass FloatExprEvaluator 1774d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : public StmtVisitor<FloatExprEvaluator, bool> { 1775d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman EvalInfo &Info; 1776d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat &Result; 1777d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanpublic: 1778d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman FloatExprEvaluator(EvalInfo &info, APFloat &result) 1779d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : Info(info), Result(result) {} 1780d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1781d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitStmt(Stmt *S) { 1782d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1783d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1784d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1785d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 1786019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner bool VisitCallExpr(const CallExpr *E); 1787d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 17885db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar bool VisitUnaryOperator(const UnaryOperator *E); 1789d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 1790d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitFloatingLiteral(const FloatingLiteral *E); 17914efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCastExpr(CastExpr *E); 1792ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor bool VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E); 179367f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman bool VisitConditionalOperator(ConditionalOperator *E); 17942217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1795ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) 1796ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 1797ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitUnaryExtension(const UnaryOperator *E) 1798ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 1799abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryReal(const UnaryOperator *E); 1800abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryImag(const UnaryOperator *E); 1801ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 1802189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall bool VisitDeclRefExpr(const DeclRefExpr *E); 1803189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1804abd3a857ace59100305790545d1baae5877b8945John McCall // FIXME: Missing: array subscript of vector, member of vector, 1805abd3a857ace59100305790545d1baae5877b8945John McCall // ImplicitValueInitExpr 1806d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman}; 1807d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} // end anonymous namespace 1808d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1809d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) { 18107db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall assert(E->getType()->isRealFloatingType()); 1811d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return FloatExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 1812d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1813d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1814db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCallstatic bool TryEvaluateBuiltinNaN(ASTContext &Context, 1815db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall QualType ResultTy, 1816db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const Expr *Arg, 1817db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall bool SNaN, 1818db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APFloat &Result) { 1819db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const StringLiteral *S = dyn_cast<StringLiteral>(Arg->IgnoreParenCasts()); 1820db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (!S) return false; 1821db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1822db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const llvm::fltSemantics &Sem = Context.getFloatTypeSemantics(ResultTy); 1823db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1824db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APInt fill; 1825db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1826db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall // Treat empty strings as if they were zero. 1827db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (S->getString().empty()) 1828db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall fill = llvm::APInt(32, 0); 1829db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else if (S->getString().getAsInteger(0, fill)) 1830db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return false; 1831db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1832db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (SNaN) 1833db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getSNaN(Sem, false, &fill); 1834db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else 1835db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getQNaN(Sem, false, &fill); 1836db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return true; 1837db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall} 1838db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1839019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattnerbool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) { 18403c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 184134a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner default: return false; 1842019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_val: 1843019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_valf: 1844019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_vall: 1845019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inf: 1846019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inff: 18477cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar case Builtin::BI__builtin_infl: { 18487cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 18497cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 185034a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner Result = llvm::APFloat::getInf(Sem); 185134a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner return true; 18527cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar } 18531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1854db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nans: 1855db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansf: 1856db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansl: 1857db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 1858db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall true, Result); 1859db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 18609e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nan: 18619e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanf: 18629e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanl: 18634572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump // If this is __builtin_nan() turn this into a nan, otherwise we 18649e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // can't constant fold it. 1865db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 1866db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall false, Result); 18675db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 18685db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabs: 18695db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsf: 18705db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsl: 18715db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info)) 18725db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 18731eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18745db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (Result.isNegative()) 18755db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 18765db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 18775db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 18781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysign: 18791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysignf: 18805db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignl: { 18815db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.); 18825db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info) || 18835db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar !EvaluateFloat(E->getArg(1), RHS, Info)) 18845db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 18855db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.copySign(RHS); 18865db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 18875db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 1888019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 1889019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner} 1890019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 1891189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCallbool FloatExprEvaluator::VisitDeclRefExpr(const DeclRefExpr *E) { 1892189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall const Decl *D = E->getDecl(); 1893189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (!isa<VarDecl>(D) || isa<ParmVarDecl>(D)) return false; 1894189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall const VarDecl *VD = cast<VarDecl>(D); 1895189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1896189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall // Require the qualifiers to be const and not volatile. 1897189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall CanQualType T = Info.Ctx.getCanonicalType(E->getType()); 1898189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (!T.isConstQualified() || T.isVolatileQualified()) 1899189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 1900189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1901189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall const Expr *Init = VD->getAnyInitializer(); 1902189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (!Init) return false; 1903189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1904189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (APValue *V = VD->getEvaluatedValue()) { 1905189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (V->isFloat()) { 1906189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall Result = V->getFloat(); 1907189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return true; 1908189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall } 1909189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 1910189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall } 1911189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1912189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (VD->isEvaluatingValue()) 1913189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 1914189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1915189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall VD->setEvaluatingValue(); 1916189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1917189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall Expr::EvalResult InitResult; 1918189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (Init->Evaluate(InitResult, Info.Ctx) && !InitResult.HasSideEffects && 1919189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall InitResult.Val.isFloat()) { 1920189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall // Cache the evaluated value in the variable declaration. 1921189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall Result = InitResult.Val.getFloat(); 1922189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall VD->setEvaluatedValue(InitResult.Val); 1923189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return true; 1924189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall } 1925189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1926189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall VD->setEvaluatedValue(APValue()); 1927189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 1928189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall} 1929189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1930abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 193143efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 193243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman ComplexValue CV; 193343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 193443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return false; 193543efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = CV.FloatReal; 193643efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return true; 193743efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman } 193843efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman 193943efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return Visit(E->getSubExpr()); 1940abd3a857ace59100305790545d1baae5877b8945John McCall} 1941abd3a857ace59100305790545d1baae5877b8945John McCall 1942abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 194343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 194443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman ComplexValue CV; 194543efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 194643efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return false; 194743efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = CV.FloatImag; 194843efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return true; 194943efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman } 195043efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman 195143efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 195243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Info.EvalResult.HasSideEffects = true; 195343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman const llvm::fltSemantics &Sem = Info.Ctx.getFloatTypeSemantics(E->getType()); 195443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = llvm::APFloat::getZero(Sem); 1955abd3a857ace59100305790545d1baae5877b8945John McCall return true; 1956abd3a857ace59100305790545d1baae5877b8945John McCall} 1957abd3a857ace59100305790545d1baae5877b8945John McCall 19585db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbarbool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 19592de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == UO_Deref) 1960a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes return false; 1961a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes 19625db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getSubExpr(), Result, Info)) 19635db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 19645db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 19655db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar switch (E->getOpcode()) { 19665db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar default: return false; 19672de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 19685db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 19692de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 19705db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 19715db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 19725db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 19735db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar} 1974019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 1975d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 19762de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Comma) { 19777f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!EvaluateFloat(E->getRHS(), Result, Info)) 19787f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return false; 19797f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 19807f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // If we can't evaluate the LHS, it might have side effects; 19817f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // conservatively mark it. 19827f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 19837f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman Info.EvalResult.HasSideEffects = true; 19847f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 19857f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return true; 19867f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman } 19877f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 198896e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson // We can't evaluate pointer-to-member operations. 198996e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson if (E->isPtrMemOp()) 199096e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson return false; 199196e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson 1992d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // FIXME: Diagnostics? I really don't understand how the warnings 1993d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // and errors are supposed to work. 19945db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.0); 1995d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getLHS(), Result, Info)) 1996d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1997d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1998d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1999d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 2000d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman switch (E->getOpcode()) { 2001d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman default: return false; 20022de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 2003d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.multiply(RHS, APFloat::rmNearestTiesToEven); 2004d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 20052de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 2006d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.add(RHS, APFloat::rmNearestTiesToEven); 2007d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 20082de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 2009d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.subtract(RHS, APFloat::rmNearestTiesToEven); 2010d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 20112de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 2012d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.divide(RHS, APFloat::rmNearestTiesToEven); 2013d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 2014d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 2015d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 2016d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 2017d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) { 2018d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result = E->getValue(); 2019d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 2020d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 2021d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 20224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCastExpr(CastExpr *E) { 20234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* SubExpr = E->getSubExpr(); 20241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20252ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (SubExpr->getType()->isIntegralOrEnumerationType()) { 20264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 20273f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!EvaluateInteger(SubExpr, IntResult, Info)) 20284efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 20291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result = HandleIntToFloatCast(E->getType(), SubExpr->getType(), 2030a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar IntResult, Info.Ctx); 20314efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 20324efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 20334efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isRealFloatingType()) { 20344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!Visit(SubExpr)) 20354efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 2036a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(E->getType(), SubExpr->getType(), 2037a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result, Info.Ctx); 20384efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 20394efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2040f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall 2041f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall if (E->getCastKind() == CK_FloatingComplexToReal) { 2042f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall ComplexValue V; 2043f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall if (!EvaluateComplex(SubExpr, V, Info)) 2044f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall return false; 2045f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall Result = V.getComplexFloatReal(); 2046f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall return true; 2047f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall } 20484efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 20494efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 20504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 20514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2052ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregorbool FloatExprEvaluator::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) { 20534efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(E->getType())); 20544efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 20554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 20564efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 205767f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedmanbool FloatExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 205867f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman bool Cond; 205967f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman if (!HandleConversionToBool(E->getCond(), Cond, Info)) 206067f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman return false; 206167f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman 206267f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 206367f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman} 206467f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman 2065d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 2066a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar// Complex Evaluation (for float and integer) 20679ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 20689ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 20699ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonnamespace { 2070770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass ComplexExprEvaluator 2071f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall : public StmtVisitor<ComplexExprEvaluator, bool> { 20729ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson EvalInfo &Info; 2073f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue &Result; 20741eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20759ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonpublic: 2076f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexExprEvaluator(EvalInfo &info, ComplexValue &Result) 2077f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall : Info(info), Result(Result) {} 20781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20799ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 20809ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson // Visitor Methods 20819ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 20829ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2083f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool VisitStmt(Stmt *S) { 2084f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 20859ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 20861eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2087f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 20889ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2089b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitImaginaryLiteral(ImaginaryLiteral *E); 2090a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 2091b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitCastExpr(CastExpr *E); 2092b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2093b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 209496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara bool VisitUnaryOperator(const UnaryOperator *E); 209596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara bool VisitConditionalOperator(const ConditionalOperator *E); 2096b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitChooseExpr(const ChooseExpr *E) 2097b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 2098b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitUnaryExtension(const UnaryOperator *E) 2099b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman { return Visit(E->getSubExpr()); } 210096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // FIXME Missing: ImplicitValueInitExpr 2101b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman}; 2102b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} // end anonymous namespace 21031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2104b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedmanstatic bool EvaluateComplex(const Expr *E, ComplexValue &Result, 2105b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman EvalInfo &Info) { 2106b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman assert(E->getType()->isAnyComplexType()); 2107b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return ComplexExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 2108b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} 2109b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2110b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedmanbool ComplexExprEvaluator::VisitImaginaryLiteral(ImaginaryLiteral *E) { 2111b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Expr* SubExpr = E->getSubExpr(); 2112b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2113b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (SubExpr->getType()->isRealFloatingType()) { 2114b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexFloat(); 2115b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APFloat &Imag = Result.FloatImag; 2116b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateFloat(SubExpr, Imag, Info)) 2117b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2118b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2119b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatReal = APFloat(Imag.getSemantics()); 2120b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 2121b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } else { 2122b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman assert(SubExpr->getType()->isIntegerType() && 2123b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman "Unexpected imaginary literal."); 2124b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2125b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexInt(); 2126b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APSInt &Imag = Result.IntImag; 2127b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateInteger(SubExpr, Imag, Info)) 2128b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2129b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2130b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntReal = APSInt(Imag.getBitWidth(), !Imag.isSigned()); 2131b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 2132b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } 2133b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} 2134b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2135b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedmanbool ComplexExprEvaluator::VisitCastExpr(CastExpr *E) { 2136b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 21378786da77984e81d48e0e1b2bd339809b1efc19f3John McCall switch (E->getCastKind()) { 21388786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BitCast: 21398786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_LValueBitCast: 21408786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BaseToDerived: 21418786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_DerivedToBase: 21428786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_UncheckedDerivedToBase: 21438786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_Dynamic: 21448786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ToUnion: 21458786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ArrayToPointerDecay: 21468786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FunctionToPointerDecay: 21478786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NullToPointer: 21488786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NullToMemberPointer: 21498786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_BaseToDerivedMemberPointer: 21508786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_DerivedToBaseMemberPointer: 21518786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_MemberPointerToBoolean: 21528786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ConstructorConversion: 21538786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToPointer: 21548786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_PointerToIntegral: 21558786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_PointerToBoolean: 21568786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ToVoid: 21578786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_VectorSplat: 21588786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralCast: 21598786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToBoolean: 21608786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralToFloating: 21618786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingToIntegral: 21628786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingToBoolean: 21638786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingCast: 21648786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_AnyPointerToObjCPointerCast: 21658786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_AnyPointerToBlockPointerCast: 21668786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_ObjCObjectLValueCast: 21678786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToReal: 21688786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToBoolean: 21698786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToReal: 21708786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToBoolean: 21718786da77984e81d48e0e1b2bd339809b1efc19f3John McCall llvm_unreachable("invalid cast kind for complex value"); 21728786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 21738786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_LValueToRValue: 21748786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_NoOp: 21758786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return Visit(E->getSubExpr()); 21762bb5d00fcf71a7b4d478d478be778fff0494aff6John McCall 21778786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_Dependent: 21788786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_GetObjCProperty: 21798786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_UserDefinedConversion: 21808786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 21818786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 21828786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingRealToComplex: { 2183b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APFloat &Real = Result.FloatReal; 21848786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!EvaluateFloat(E->getSubExpr(), Real, Info)) 2185b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2186b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 21878786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexFloat(); 21888786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatImag = APFloat(Real.getSemantics()); 21898786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 21908786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 21918786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 21928786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexCast: { 21938786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 21948786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 21958786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 21968786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 21978786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 21988786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 21998786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 22008786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatReal 22018786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = HandleFloatToFloatCast(To, From, Result.FloatReal, Info.Ctx); 22028786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatImag 22038786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = HandleFloatToFloatCast(To, From, Result.FloatImag, Info.Ctx); 22048786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 22058786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 22068786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 22078786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_FloatingComplexToIntegralComplex: { 22088786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 22098786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 22108786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 22118786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 22128786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 22138786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 22148786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexInt(); 22158786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntReal = HandleFloatToIntCast(To, From, Result.FloatReal, Info.Ctx); 22168786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntImag = HandleFloatToIntCast(To, From, Result.FloatImag, Info.Ctx); 22178786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 22188786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 22198786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 22208786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralRealToComplex: { 2221b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APSInt &Real = Result.IntReal; 22228786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!EvaluateInteger(E->getSubExpr(), Real, Info)) 2223b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 22249ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 22258786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexInt(); 22268786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntImag = APSInt(Real.getBitWidth(), !Real.isSigned()); 22278786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 22288786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 22298786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 22308786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexCast: { 22318786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 2232b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2233ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 22348786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 22358786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 22368786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 22371725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 22388786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntReal = HandleIntToIntCast(To, From, Result.IntReal, Info.Ctx); 22398786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.IntImag = HandleIntToIntCast(To, From, Result.IntImag, Info.Ctx); 22408786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 22418786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 22428786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 22438786da77984e81d48e0e1b2bd339809b1efc19f3John McCall case CK_IntegralComplexToFloatingComplex: { 22448786da77984e81d48e0e1b2bd339809b1efc19f3John McCall if (!Visit(E->getSubExpr())) 22458786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return false; 22468786da77984e81d48e0e1b2bd339809b1efc19f3John McCall 22478786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType To = E->getType()->getAs<ComplexType>()->getElementType(); 22488786da77984e81d48e0e1b2bd339809b1efc19f3John McCall QualType From 22498786da77984e81d48e0e1b2bd339809b1efc19f3John McCall = E->getSubExpr()->getType()->getAs<ComplexType>()->getElementType(); 22508786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.makeComplexFloat(); 22518786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatReal = HandleIntToFloatCast(To, From, Result.IntReal, Info.Ctx); 22528786da77984e81d48e0e1b2bd339809b1efc19f3John McCall Result.FloatImag = HandleIntToFloatCast(To, From, Result.IntImag, Info.Ctx); 22538786da77984e81d48e0e1b2bd339809b1efc19f3John McCall return true; 22548786da77984e81d48e0e1b2bd339809b1efc19f3John McCall } 2255ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 22561eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22578786da77984e81d48e0e1b2bd339809b1efc19f3John McCall llvm_unreachable("unknown cast resulting in complex value"); 2258b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 22599ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} 22609ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2261f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallbool ComplexExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 226296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (E->getOpcode() == BO_Comma) { 226396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (!Visit(E->getRHS())) 226496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 226596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 226696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // If we can't evaluate the LHS, it might have side effects; 226796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // conservatively mark it. 226896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (!E->getLHS()->isEvaluatable(Info.Ctx)) 226996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Info.EvalResult.HasSideEffects = true; 227096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 227196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 227296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 2273f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (!Visit(E->getLHS())) 2274f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 22751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2276f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue RHS; 2277a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 2278f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 2279a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 22803f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar assert(Result.isComplexFloat() == RHS.isComplexFloat() && 22813f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar "Invalid operands to binary operator."); 2282ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson switch (E->getOpcode()) { 2283f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall default: return false; 22842de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 2285a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 2286a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().add(RHS.getComplexFloatReal(), 2287a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2288a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().add(RHS.getComplexFloatImag(), 2289a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2290a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 2291a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() += RHS.getComplexIntReal(); 2292a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() += RHS.getComplexIntImag(); 2293a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 22943f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 22952de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 2296a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 2297a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().subtract(RHS.getComplexFloatReal(), 2298a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2299a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().subtract(RHS.getComplexFloatImag(), 2300a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2301a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 2302a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() -= RHS.getComplexIntReal(); 2303a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() -= RHS.getComplexIntImag(); 2304a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 23053f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 23062de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 23073f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar if (Result.isComplexFloat()) { 2308f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 23093f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_r = LHS.getComplexFloatReal(); 23103f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_i = LHS.getComplexFloatImag(); 23113f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_r = RHS.getComplexFloatReal(); 23123f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_i = RHS.getComplexFloatImag(); 23131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 23143f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat Tmp = LHS_r; 23153f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 23163f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal() = Tmp; 23173f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 23183f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 23193f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal().subtract(Tmp, APFloat::rmNearestTiesToEven); 23203f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 23213f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_r; 23223f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 23233f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag() = Tmp; 23243f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 23253f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 23263f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag().add(Tmp, APFloat::rmNearestTiesToEven); 23273f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } else { 2328f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 23291eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntReal() = 23303f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntReal() - 23313f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntImag()); 23321eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntImag() = 23333f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntImag() + 23343f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntReal()); 23353f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } 23363f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 233796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case BO_Div: 233896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) { 233996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara ComplexValue LHS = Result; 234096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &LHS_r = LHS.getComplexFloatReal(); 234196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &LHS_i = LHS.getComplexFloatImag(); 234296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &RHS_r = RHS.getComplexFloatReal(); 234396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &RHS_i = RHS.getComplexFloatImag(); 234496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &Res_r = Result.getComplexFloatReal(); 234596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat &Res_i = Result.getComplexFloatImag(); 234696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 234796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat Den = RHS_r; 234896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Den.multiply(RHS_r, APFloat::rmNearestTiesToEven); 234996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APFloat Tmp = RHS_i; 235096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 235196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Den.add(Tmp, APFloat::rmNearestTiesToEven); 235296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 235396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r = LHS_r; 235496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.multiply(RHS_r, APFloat::rmNearestTiesToEven); 235596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp = LHS_i; 235696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 235796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.add(Tmp, APFloat::rmNearestTiesToEven); 235896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_r.divide(Den, APFloat::rmNearestTiesToEven); 235996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 236096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i = LHS_i; 236196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.multiply(RHS_r, APFloat::rmNearestTiesToEven); 236296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp = LHS_r; 236396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 236496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.subtract(Tmp, APFloat::rmNearestTiesToEven); 236596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Res_i.divide(Den, APFloat::rmNearestTiesToEven); 236696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } else { 236796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (RHS.getComplexIntReal() == 0 && RHS.getComplexIntImag() == 0) { 236896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // FIXME: what about diagnostics? 236996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 237096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 237196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara ComplexValue LHS = Result; 237296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara APSInt Den = RHS.getComplexIntReal() * RHS.getComplexIntReal() + 237396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara RHS.getComplexIntImag() * RHS.getComplexIntImag(); 237496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntReal() = 237596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara (LHS.getComplexIntReal() * RHS.getComplexIntReal() + 237696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara LHS.getComplexIntImag() * RHS.getComplexIntImag()) / Den; 237796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = 237896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara (LHS.getComplexIntImag() * RHS.getComplexIntReal() - 237996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara LHS.getComplexIntReal() * RHS.getComplexIntImag()) / Den; 238096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 238196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara break; 2382ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 2383ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 2384f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2385ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson} 2386ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 238796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnarabool ComplexExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 238896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // Get the operand value into 'Result'. 238996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (!Visit(E->getSubExpr())) 239096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 239196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 239296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara switch (E->getOpcode()) { 239396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara default: 239496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // FIXME: what about diagnostics? 239596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 239696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Extension: 239796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 239896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Plus: 239996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara // The result is always just the subexpr. 240096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 240196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Minus: 240296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) { 240396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatReal().changeSign(); 240496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatImag().changeSign(); 240596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 240696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara else { 240796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntReal() = -Result.getComplexIntReal(); 240896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = -Result.getComplexIntImag(); 240996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 241096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 241196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara case UO_Not: 241296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (Result.isComplexFloat()) 241396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexFloatImag().changeSign(); 241496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara else 241596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara Result.getComplexIntImag() = -Result.getComplexIntImag(); 241696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return true; 241796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara } 241896fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara} 241996fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 242096fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnarabool ComplexExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 242196fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara bool Cond; 242296fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara if (!HandleConversionToBool(E->getCond(), Cond, Info)) 242396fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return false; 242496fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 242596fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 242696fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara} 242796fc8e4086df323c49f17cac594db1d2f066a2e9Abramo Bagnara 24289ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 24296ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner// Top level Expr::Evaluate method. 2430f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 2431f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 243242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// Evaluate - Return true if this is a constant which we can fold using 243342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// any crazy technique (that has nothing to do with language standards) that 243442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// we want to. If this function returns true, it returns the folded constant 243542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// in Result. 243642c8f87eb60958170c46767273bf93e6c96125bfJohn McCallbool Expr::Evaluate(EvalResult &Result, ASTContext &Ctx) const { 243742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall const Expr *E = this; 243842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall EvalInfo Info(Ctx, Result); 2439efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (E->getType()->isVectorType()) { 2440efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateVector(E, Info.EvalResult.Val, Info)) 244159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 2442efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isIntegerType()) { 2443efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!IntExprEvaluator(Info, Info.EvalResult.Val).Visit(const_cast<Expr*>(E))) 24446dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 24450f2b692bb10be35fdc60d0a72a847bdd73124670John McCall if (Result.Val.isLValue() && !IsGlobalLValue(Result.Val.getLValueBase())) 24460f2b692bb10be35fdc60d0a72a847bdd73124670John McCall return false; 2447efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->hasPointerRepresentation()) { 2448efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 2449efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(E, LV, Info)) 24506dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 2451e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (!IsGlobalLValue(LV.Base)) 245242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 2453efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Info.EvalResult.Val); 2454efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isRealFloatingType()) { 2455efdb83e26f9a1fd2566afe54461216cd84814d42John McCall llvm::APFloat F(0.0); 2456efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateFloat(E, F, Info)) 24576dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 24581eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2459efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Info.EvalResult.Val = APValue(F); 2460efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isAnyComplexType()) { 2461efdb83e26f9a1fd2566afe54461216cd84814d42John McCall ComplexValue C; 2462efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateComplex(E, C, Info)) 2463660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 2464efdb83e26f9a1fd2566afe54461216cd84814d42John McCall C.moveInto(Info.EvalResult.Val); 2465660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else 2466660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 2467660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 2468660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return true; 2469660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump} 2470660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 2471cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCallbool Expr::EvaluateAsBooleanCondition(bool &Result, ASTContext &Ctx) const { 2472cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalResult Scratch; 2473cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalInfo Info(Ctx, Scratch); 2474cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall 2475cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall return HandleConversionToBool(this, Result, Info); 2476cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall} 2477cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall 24781b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlssonbool Expr::EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const { 24791b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson EvalInfo Info(Ctx, Result); 24801b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 2481efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 248242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (EvaluateLValue(this, LV, Info) && 248342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall !Result.HasSideEffects && 2484e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara IsGlobalLValue(LV.Base)) { 2485e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara LV.moveInto(Result.Val); 2486e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return true; 2487e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara } 2488e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return false; 2489e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara} 2490e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2491e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnarabool Expr::EvaluateAsAnyLValue(EvalResult &Result, ASTContext &Ctx) const { 2492e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara EvalInfo Info(Ctx, Result); 2493e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2494e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara LValue LV; 2495e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (EvaluateLValue(this, LV, Info)) { 2496efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result.Val); 2497efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 2498efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 2499efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 2500b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman} 2501b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 25026ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// isEvaluatable - Call Evaluate to see if this expression can be constant 250345b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner/// folded, but discard the result. 250445b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattnerbool Expr::isEvaluatable(ASTContext &Ctx) const { 25054fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson EvalResult Result; 25064fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects; 250745b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner} 250851fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 2509393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanianbool Expr::HasSideEffects(ASTContext &Ctx) const { 2510393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian Expr::EvalResult Result; 2511393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian EvalInfo Info(Ctx, Result); 2512393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return HasSideEffect(Info).Visit(const_cast<Expr*>(this)); 2513393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian} 2514393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian 251551fe996231b1d7199f76e4005ff4c943d5deeecdAnders CarlssonAPSInt Expr::EvaluateAsInt(ASTContext &Ctx) const { 25161c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 25171c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson bool Result = Evaluate(EvalResult, Ctx); 2518c6ed729f669044f5072a49d79041f455d971ece3Jeffrey Yasskin (void)Result; 251951fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson assert(Result && "Could not evaluate expression"); 25201c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(EvalResult.Val.isInt() && "Expression did not evaluate to integer"); 252151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 25221c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson return EvalResult.Val.getInt(); 252351fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson} 2524d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2525e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara bool Expr::EvalResult::isGlobalLValue() const { 2526e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara assert(Val.isLValue()); 2527e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return IsGlobalLValue(Val.getLValueBase()); 2528e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara } 2529e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2530e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2531d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// isIntegerConstantExpr - this recursive routine will test if an expression is 2532d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// an integer constant expression. 2533d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2534d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Pass up a reason why! Invalid operation in i-c-e, division by zero, 2535d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// comma, etc 2536d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// 2537d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Handle offsetof. Two things to do: Handle GCC's __builtin_offsetof 2538d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// to support gcc 4.0+ and handle the idiom GCC recognizes with a null pointer 2539d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// cast+dereference. 2540d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2541d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// CheckICE - This function does the fundamental ICE checking: the returned 2542d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// ICEDiag contains a Val of 0, 1, or 2, and a possibly null SourceLocation. 2543d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Note that to reduce code duplication, this helper does no evaluation 2544d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// itself; the caller checks whether the expression is evaluatable, and 2545d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// in the rare cases where CheckICE actually cares about the evaluated 2546d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// value, it calls into Evalute. 2547d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 2548d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Meanings of Val: 2549d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 0: This expression is an ICE if it can be evaluated by Evaluate. 2550d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 1: This expression is not an ICE, but if it isn't evaluated, it's 2551d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// a legal subexpression for an ICE. This return value is used to handle 2552d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// the comma operator in C99 mode. 2553d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 2: This expression is not an ICE, and is not a legal subexpression for one. 2554d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 25553c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 25563c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 2557d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstruct ICEDiag { 2558d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall unsigned Val; 2559d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall SourceLocation Loc; 2560d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2561d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall public: 2562d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag(unsigned v, SourceLocation l) : Val(v), Loc(l) {} 2563d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag() : Val(0) {} 2564d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall}; 2565d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 25663c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 25673c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 25683c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmanstatic ICEDiag NoDiag() { return ICEDiag(); } 2569d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2570d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckEvalInICE(const Expr* E, ASTContext &Ctx) { 2571d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 2572d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!E->Evaluate(EVResult, Ctx) || EVResult.HasSideEffects || 2573d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 2574d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2575d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2576d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2577d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 2578d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2579d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckICE(const Expr* E, ASTContext &Ctx) { 2580d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(!E->isValueDependent() && "Should not see value dependent exprs!"); 25812ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!E->getType()->isIntegralOrEnumerationType()) { 2582d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2583d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2584d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2585d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (E->getStmtClass()) { 2586d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define STMT(Node, Base) case Expr::Node##Class: 2587d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define EXPR(Node, Base) 2588d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#include "clang/AST/StmtNodes.inc" 2589d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::PredefinedExprClass: 2590d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::FloatingLiteralClass: 2591d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImaginaryLiteralClass: 2592d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StringLiteralClass: 2593d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ArraySubscriptExprClass: 2594d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::MemberExprClass: 2595d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundAssignOperatorClass: 2596d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundLiteralExprClass: 2597d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ExtVectorElementExprClass: 2598d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::InitListExprClass: 2599d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DesignatedInitExprClass: 2600d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitValueInitExprClass: 2601d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenListExprClass: 2602d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::VAArgExprClass: 2603d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::AddrLabelExprClass: 2604d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StmtExprClass: 2605d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXMemberCallExprClass: 2606d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDynamicCastExprClass: 2607d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTypeidExprClass: 26089be88403e965cc49af76c9d33d818781d44b333eFrancois Pichet case Expr::CXXUuidofExprClass: 2609d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNullPtrLiteralExprClass: 2610d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThisExprClass: 2611d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThrowExprClass: 2612d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNewExprClass: 2613d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDeleteExprClass: 2614d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXPseudoDestructorExprClass: 2615d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedLookupExprClass: 2616d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DependentScopeDeclRefExprClass: 2617d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXConstructExprClass: 2618d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBindTemporaryExprClass: 26194765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall case Expr::ExprWithCleanupsClass: 2620d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTemporaryObjectExprClass: 2621d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXUnresolvedConstructExprClass: 2622d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDependentScopeMemberExprClass: 2623d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedMemberExprClass: 2624d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCStringLiteralClass: 2625d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCEncodeExprClass: 2626d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCMessageExprClass: 2627d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCSelectorExprClass: 2628d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCProtocolExprClass: 2629d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIvarRefExprClass: 2630d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCPropertyRefExprClass: 2631d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIsaExprClass: 2632d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ShuffleVectorExprClass: 2633d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockExprClass: 2634d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockDeclRefExprClass: 2635d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::NoStmtClass: 26367cd7d1ad33fdf49eef83942e8855fe20d95aa1b9John McCall case Expr::OpaqueValueExprClass: 2637d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2638d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2639d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::GNUNullExprClass: 2640d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // GCC considers the GNU __null value to be an integral constant expression. 2641d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2642d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2643d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenExprClass: 2644d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ParenExpr>(E)->getSubExpr(), Ctx); 2645d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::IntegerLiteralClass: 2646d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CharacterLiteralClass: 2647d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBoolLiteralExprClass: 2648ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor case Expr::CXXScalarValueInitExprClass: 2649d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryTypeTraitExprClass: 26506ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet case Expr::BinaryTypeTraitExprClass: 26512e156225a29407a50dd19041aa5750171ad44ea3Sebastian Redl case Expr::CXXNoexceptExprClass: 2652d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2653d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CallExprClass: 26546cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt case Expr::CXXOperatorCallExprClass: { 2655d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const CallExpr *CE = cast<CallExpr>(E); 2656d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CE->isBuiltinCall(Ctx)) 2657d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 2658d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2659d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2660d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DeclRefExprClass: 2661d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<EnumConstantDecl>(cast<DeclRefExpr>(E)->getDecl())) 2662d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2663d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Ctx.getLangOptions().CPlusPlus && 2664d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall E->getType().getCVRQualifiers() == Qualifiers::Const) { 2665d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl(); 2666d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2667d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Parameter variables are never constants. Without this check, 2668d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // getAnyInitializer() can find a default argument, which leads 2669d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to chaos. 2670d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<ParmVarDecl>(D)) 2671d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2672d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2673d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C++ 7.1.5.1p2 2674d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // A variable of non-volatile const-qualified integral or enumeration 2675d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // type initialized by an ICE can be used in ICEs. 2676d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const VarDecl *Dcl = dyn_cast<VarDecl>(D)) { 2677d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Qualifiers Quals = Ctx.getCanonicalType(Dcl->getType()).getQualifiers(); 2678d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Quals.hasVolatile() || !Quals.hasConst()) 2679d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2680d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2681d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Look for a declaration of this variable that has an initializer. 2682d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const VarDecl *ID = 0; 2683d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const Expr *Init = Dcl->getAnyInitializer(ID); 2684d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Init) { 2685d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (ID->isInitKnownICE()) { 2686d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // We have already checked whether this subexpression is an 2687d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // integral constant expression. 2688d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (ID->isInitICE()) 2689d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2690d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall else 2691d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2692d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2693d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2694d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // It's an ICE whether or not the definition we found is 2695d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // out-of-line. See DR 721 and the discussion in Clang PR 2696d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // 6206 for details. 2697d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2698d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Dcl->isCheckingICE()) { 2699d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2700d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2701d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2702d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Dcl->setCheckingICE(); 2703d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag Result = CheckICE(Init, Ctx); 2704d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Cache the result of the ICE test. 2705d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Dcl->setInitKnownICE(Result.Val == 0); 2706d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return Result; 2707d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2708d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2709d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2710d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2711d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryOperatorClass: { 2712d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const UnaryOperator *Exp = cast<UnaryOperator>(E); 2713d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 27142de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PostInc: 27152de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PostDec: 27162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PreInc: 27172de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PreDec: 27182de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_AddrOf: 27192de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Deref: 2720d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 27212de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: 27222de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_LNot: 27232de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 27242de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 27252de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 27262de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Real: 27272de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Imag: 2728d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(Exp->getSubExpr(), Ctx); 2729d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2730d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2731d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // OffsetOf falls through here. 2732d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2733d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::OffsetOfExprClass: { 2734d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that per C99, offsetof must be an ICE. And AFAIK, using 2735d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Evaluate matches the proposed gcc behavior for cases like 2736d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // "offsetof(struct s{int x[4];}, x[!.0])". This doesn't affect 2737d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // compliance: we should warn earlier for offsetof expressions with 2738d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // array subscripts that aren't ICEs, and if the array subscripts 2739d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // are ICEs, the value of the offsetof must be an integer constant. 2740d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 2741d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2742d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::SizeOfAlignOfExprClass: { 2743d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const SizeOfAlignOfExpr *Exp = cast<SizeOfAlignOfExpr>(E); 2744d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Exp->isSizeOf() && Exp->getTypeOfArgument()->isVariableArrayType()) 2745d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2746d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2747d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2748d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BinaryOperatorClass: { 2749d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const BinaryOperator *Exp = cast<BinaryOperator>(E); 2750d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 27512de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_PtrMemD: 27522de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_PtrMemI: 27532de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Assign: 27542de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_MulAssign: 27552de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_DivAssign: 27562de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_RemAssign: 27572de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AddAssign: 27582de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_SubAssign: 27592de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShlAssign: 27602de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShrAssign: 27612de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AndAssign: 27622de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_XorAssign: 27632de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_OrAssign: 2764d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2765d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 27662de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 27672de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 27682de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Rem: 27692de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 27702de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 27712de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shl: 27722de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shr: 27732de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: 27742de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: 27752de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: 27762de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: 27772de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: 27782de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: 27792de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_And: 27802de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Xor: 27812de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Or: 27822de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Comma: { 2783d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 2784d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 27852de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Exp->getOpcode() == BO_Div || 27862de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall Exp->getOpcode() == BO_Rem) { 2787d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Evaluate gives an error for undefined Div/Rem, so make sure 2788d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // we don't evaluate one. 2789d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val != 2 && RHSResult.Val != 2) { 2790d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm::APSInt REval = Exp->getRHS()->EvaluateAsInt(Ctx); 2791d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval == 0) 2792d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2793d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval.isSigned() && REval.isAllOnesValue()) { 2794d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm::APSInt LEval = Exp->getLHS()->EvaluateAsInt(Ctx); 2795d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LEval.isMinSignedValue()) 2796d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2797d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2798d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2799d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 28002de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Exp->getOpcode() == BO_Comma) { 2801d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Ctx.getLangOptions().C99) { 2802d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C99 6.6p3 introduces a strange edge case: comma can be in an ICE 2803d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // if it isn't evaluated. 2804d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 0) 2805d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2806d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } else { 2807d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // In both C89 and C++, commas in ICEs are illegal. 2808d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2809d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2810d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2811d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 2812d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 2813d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 2814d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 28152de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LAnd: 28162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LOr: { 2817d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 2818d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 2819d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 1) { 2820d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the RHS has a comma "side-effect"; we need 2821d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to actually check the condition to see whether the side 2822d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // with the comma is evaluated. 28232de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if ((Exp->getOpcode() == BO_LAnd) != 2824d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall (Exp->getLHS()->EvaluateAsInt(Ctx) == 0)) 2825d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 2826d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2827d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2828d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2829d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 2830d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 2831d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 2832d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2833d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2834d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2835d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitCastExprClass: 2836d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CStyleCastExprClass: 2837d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXFunctionalCastExprClass: 2838d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXStaticCastExprClass: 2839d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXReinterpretCastExprClass: 2840d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXConstCastExprClass: { 2841d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const Expr *SubExpr = cast<CastExpr>(E)->getSubExpr(); 28422ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (SubExpr->getType()->isIntegralOrEnumerationType()) 2843d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(SubExpr, Ctx); 2844d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<FloatingLiteral>(SubExpr->IgnoreParens())) 2845d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2846d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2847d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2848d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ConditionalOperatorClass: { 2849d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const ConditionalOperator *Exp = cast<ConditionalOperator>(E); 2850d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // If the condition (ignoring parens) is a __builtin_constant_p call, 2851d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // then only the true side is actually considered in an integer constant 2852d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // expression, and it is fully evaluated. This is an important GNU 2853d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // extension. See GCC PR38377 for discussion. 2854d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const CallExpr *CallCE 2855d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall = dyn_cast<CallExpr>(Exp->getCond()->IgnoreParenCasts())) 2856d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CallCE->isBuiltinCall(Ctx) == Builtin::BI__builtin_constant_p) { 2857d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 2858d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!E->Evaluate(EVResult, Ctx) || EVResult.HasSideEffects || 2859d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 2860d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2861d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2862d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2863d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2864d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag CondResult = CheckICE(Exp->getCond(), Ctx); 2865d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag TrueResult = CheckICE(Exp->getTrueExpr(), Ctx); 2866d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag FalseResult = CheckICE(Exp->getFalseExpr(), Ctx); 2867d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 2) 2868d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 2869d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 2) 2870d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 2871d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (FalseResult.Val == 2) 2872d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 2873d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 1) 2874d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 2875d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 0 && FalseResult.Val == 0) 2876d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2877d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the diagnostics depend on which side is evaluated 2878d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that if we get here, CondResult is 0, and at least one of 2879d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // TrueResult and FalseResult is non-zero. 2880d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Exp->getCond()->EvaluateAsInt(Ctx) == 0) { 2881d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 2882d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2883d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 2884d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2885d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDefaultArgExprClass: 2886d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<CXXDefaultArgExpr>(E)->getExpr(), Ctx); 2887d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ChooseExprClass: { 2888d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ChooseExpr>(E)->getChosenSubExpr(Ctx), Ctx); 2889d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2890d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2891d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2892d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Silence a GCC warning 2893d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2894d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 2895d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2896d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallbool Expr::isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 2897d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall SourceLocation *Loc, bool isEvaluated) const { 2898d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag d = CheckICE(this, Ctx); 2899d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (d.Val != 0) { 2900d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Loc) *Loc = d.Loc; 2901d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return false; 2902d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2903d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall EvalResult EvalResult; 2904d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!Evaluate(EvalResult, Ctx)) 2905d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm_unreachable("ICE cannot be evaluated!"); 2906d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(!EvalResult.HasSideEffects && "ICE with side effects!"); 2907d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(EvalResult.Val.isInt() && "ICE that isn't integer!"); 2908d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Result = EvalResult.Val.getInt(); 2909d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return true; 2910d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 2911