ExprConstant.cpp revision 3c46e8db99196179b30e7ac5c20c4efd5f3926d7
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. 223a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 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 34026bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson case CastExpr::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) { 484650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() != BinaryOperator::Add && 485650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson E->getOpcode() != BinaryOperator::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 515650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (E->getOpcode() == BinaryOperator::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 53509a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_Unknown: { 53609a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman // FIXME: The handling for CK_Unknown is ugly/shouldn't be necessary! 53709a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 53809a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman // Check for pointer->pointer cast 53909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman if (SubExpr->getType()->isPointerType() || 54009a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman SubExpr->getType()->isObjCObjectPointerType() || 54109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman SubExpr->getType()->isNullPtrType() || 54209a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman SubExpr->getType()->isBlockPointerType()) 54309a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman return Visit(SubExpr); 54409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 5452ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (SubExpr->getType()->isIntegralOrEnumerationType()) { 546efdb83e26f9a1fd2566afe54461216cd84814d42John McCall APValue Value; 547efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateIntegerOrLValue(SubExpr, Value, Info)) 54809a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 54909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 550efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (Value.isInt()) { 551efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Value.getInt().extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 552efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = 0; 553efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::fromQuantity(Value.getInt().getZExtValue()); 554efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 555efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else { 556efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = Value.getLValueBase(); 557efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = Value.getLValueOffset(); 558efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 55909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman } 56009a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman } 56109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 562650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 5631eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 56409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_NoOp: 56509a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_BitCast: 566e39a3894513349908cdb3beba2614e53cb288e6cDouglas Gregor case CastExpr::CK_LValueBitCast: 56709a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_AnyPointerToObjCPointerCast: 56809a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_AnyPointerToBlockPointerCast: 56909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman return Visit(SubExpr); 57009a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 57109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_IntegralToPointer: { 572efdb83e26f9a1fd2566afe54461216cd84814d42John McCall APValue Value; 573efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateIntegerOrLValue(SubExpr, Value, Info)) 57409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 57569ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 576efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (Value.isInt()) { 577efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Value.getInt().extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 578efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = 0; 579efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::fromQuantity(Value.getInt().getZExtValue()); 580efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 581efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else { 582efdb83e26f9a1fd2566afe54461216cd84814d42John McCall // Cast is of an lvalue, no need to change value. 583efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = Value.getLValueBase(); 584efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = Value.getLValueOffset(); 585efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 586650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 587650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 58809a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman case CastExpr::CK_ArrayToPointerDecay: 589efdb83e26f9a1fd2566afe54461216cd84814d42John McCall case CastExpr::CK_FunctionToPointerDecay: 590efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluateLValue(SubExpr, Result, Info); 5914efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 5924efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 593efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 5941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 595650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 596efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitCallExpr(CallExpr *E) { 5971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (E->isBuiltinCall(Info.Ctx) == 5980d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Builtin::BI__builtin___CFStringMakeConstantString || 5990d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall E->isBuiltinCall(Info.Ctx) == 6000d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Builtin::BI__builtin___NSStringMakeConstantString) 601efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 602efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6033941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman} 6043941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman 605efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 6064efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 6074efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 608efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6094efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 6104efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 611efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Visit(EvalExpr); 6124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 613f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 614f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 61559b5da6d853b4368b984700315adf7b37de05764Nate Begeman// Vector Evaluation 61659b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 61759b5da6d853b4368b984700315adf7b37de05764Nate Begeman 61859b5da6d853b4368b984700315adf7b37de05764Nate Begemannamespace { 619770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramer class VectorExprEvaluator 62059b5da6d853b4368b984700315adf7b37de05764Nate Begeman : public StmtVisitor<VectorExprEvaluator, APValue> { 62159b5da6d853b4368b984700315adf7b37de05764Nate Begeman EvalInfo &Info; 62291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue GetZeroVector(QualType VecType); 62359b5da6d853b4368b984700315adf7b37de05764Nate Begeman public: 6241eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 62559b5da6d853b4368b984700315adf7b37de05764Nate Begeman VectorExprEvaluator(EvalInfo &info) : Info(info) {} 6261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 62759b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitStmt(Stmt *S) { 62859b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 62959b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 6301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 63191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitParenExpr(ParenExpr *E) 63291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 63391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 63491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 63591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryPlus(const UnaryOperator *E) 63691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 63791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryReal(const UnaryOperator *E) 63891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 63991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) 64091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return GetZeroVector(E->getType()); } 64159b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCastExpr(const CastExpr* E); 64259b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 64359b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitInitListExpr(const InitListExpr *E); 64491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitConditionalOperator(const ConditionalOperator *E); 645ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 646ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 64791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryImag(const UnaryOperator *E); 64891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // FIXME: Missing: unary -, unary ~, binary add/sub/mul/div, 6492217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // binary comparisons, binary and/or/xor, 65091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // shufflevector, ExtVectorElementExpr 65191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // (Note that these require implementing conversions 65291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // between vector types.) 65359b5da6d853b4368b984700315adf7b37de05764Nate Begeman }; 65459b5da6d853b4368b984700315adf7b37de05764Nate Begeman} // end anonymous namespace 65559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 65659b5da6d853b4368b984700315adf7b37de05764Nate Begemanstatic bool EvaluateVector(const Expr* E, APValue& Result, EvalInfo &Info) { 65759b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!E->getType()->isVectorType()) 65859b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 65959b5da6d853b4368b984700315adf7b37de05764Nate Begeman Result = VectorExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 66059b5da6d853b4368b984700315adf7b37de05764Nate Begeman return !Result.isUninit(); 66159b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 66259b5da6d853b4368b984700315adf7b37de05764Nate Begeman 66359b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue VectorExprEvaluator::VisitCastExpr(const CastExpr* E) { 664183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VTy = E->getType()->getAs<VectorType>(); 665c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman QualType EltTy = VTy->getElementType(); 666c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned NElts = VTy->getNumElements(); 667c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned EltWidth = Info.Ctx.getTypeSize(EltTy); 6681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 66959b5da6d853b4368b984700315adf7b37de05764Nate Begeman const Expr* SE = E->getSubExpr(); 670e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman QualType SETy = SE->getType(); 671e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APValue Result = APValue(); 67259b5da6d853b4368b984700315adf7b37de05764Nate Begeman 673e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman // Check for vector->vector bitcast and scalar->vector splat. 674e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman if (SETy->isVectorType()) { 67559b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(SE)); 676e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isIntegerType()) { 677e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APSInt IntResult; 678d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateInteger(SE, IntResult, Info)) 679d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 680d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(IntResult); 681e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isRealFloatingType()) { 682e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APFloat F(0.0); 683d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateFloat(SE, F, Info)) 684d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 685d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(F); 686d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar } else 687c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 68859b5da6d853b4368b984700315adf7b37de05764Nate Begeman 689c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to ExtVector, convert the scalar to the element type 690c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // and splat it to all elements. 691c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (E->getType()->isExtVectorType()) { 692c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType() && Result.isInt()) 693c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToIntCast(EltTy, SETy, Result.getInt(), 694c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 695c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isIntegerType()) 696c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToIntCast(EltTy, SETy, Result.getFloat(), 697c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 698c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType() && Result.isInt()) 699c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToFloatCast(EltTy, SETy, Result.getInt(), 700c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 701c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 702c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToFloatCast(EltTy, SETy, Result.getFloat(), 703c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 704c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 705c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 706c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 707c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // Splat and create vector APValue. 708c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts(NElts, Result); 709c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 710e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } 711c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 712c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to regular gcc-style vector type, bitcast the scalar 713c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // to the vector. To construct the APValue vector initializer, bitcast the 714c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // initializing value to an APInt, and shift out the bits pertaining to each 715c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // element. 716c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman APSInt Init; 717c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init = Result.isInt() ? Result.getInt() : Result.getFloat().bitcastToAPInt(); 7181eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 719c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts; 720c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman for (unsigned i = 0; i != NElts; ++i) { 721c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman APSInt Tmp = Init; 722c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Tmp.extOrTrunc(EltWidth); 7231eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 724c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType()) 725c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(Tmp)); 726c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 727c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(APFloat(Tmp))); 728c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 729c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 730c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 731c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init >>= EltWidth; 732c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman } 733c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 73459b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 73559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 7361eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 73759b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 73859b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(E->getInitializer())); 73959b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 74059b5da6d853b4368b984700315adf7b37de05764Nate Begeman 7411eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 74259b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 743183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = E->getType()->getAs<VectorType>(); 74459b5da6d853b4368b984700315adf7b37de05764Nate Begeman unsigned NumInits = E->getNumInits(); 74591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman unsigned NumElements = VT->getNumElements(); 7461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 74759b5da6d853b4368b984700315adf7b37de05764Nate Begeman QualType EltTy = VT->getElementType(); 74859b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::SmallVector<APValue, 4> Elements; 74959b5da6d853b4368b984700315adf7b37de05764Nate Begeman 750a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // If a vector is initialized with a single element, that value 751a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // becomes every element of the vector, not just the first. 752a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // This is the behavior described in the IBM AltiVec documentation. 753a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (NumInits == 1) { 754a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall APValue InitValue; 75559b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (EltTy->isIntegerType()) { 75659b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APSInt sInt(32); 757a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(0), sInt, Info)) 758a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 759a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(sInt); 76059b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else { 76159b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APFloat f(0.0); 762a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(0), f, Info)) 763a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 764a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(f); 765a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 766a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 767a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(InitValue); 768a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 769a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 770a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 771a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (EltTy->isIntegerType()) { 772a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APSInt sInt(32); 773a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 774a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(i), sInt, Info)) 775a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 776a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 777a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall sInt = Info.Ctx.MakeIntValue(0, EltTy); 778a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 779a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(sInt)); 78091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 781a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APFloat f(0.0); 782a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 783a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(i), f, Info)) 784a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 785a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 786a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall f = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy)); 787a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 788a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(f)); 78991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 79059b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 79159b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 79259b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(&Elements[0], Elements.size()); 79359b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 79459b5da6d853b4368b984700315adf7b37de05764Nate Begeman 7951eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 79691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanVectorExprEvaluator::GetZeroVector(QualType T) { 797183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = T->getAs<VectorType>(); 79891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman QualType EltTy = VT->getElementType(); 79991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue ZeroElement; 80091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EltTy->isIntegerType()) 80191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = APValue(Info.Ctx.MakeIntValue(0, EltTy)); 80291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman else 80391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = 80491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue(APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy))); 80591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 80691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman llvm::SmallVector<APValue, 4> Elements(VT->getNumElements(), ZeroElement); 80791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(&Elements[0], Elements.size()); 80891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 80991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 81091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 81191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman bool BoolResult; 81291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 81391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 81491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 81591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 81691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 81791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue Result; 81891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EvaluateVector(EvalExpr, Result, Info)) 81991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return Result; 82091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 82191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 82291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 82391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 82491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 82591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Info.EvalResult.HasSideEffects = true; 82691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return GetZeroVector(E->getType()); 82791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 82891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 82959b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 830f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Integer Evaluation 831f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 832f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 833f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnernamespace { 834770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass IntExprEvaluator 835b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner : public StmtVisitor<IntExprEvaluator, bool> { 83687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 83730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue &Result; 838f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerpublic: 83930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar IntExprEvaluator(EvalInfo &info, APValue &result) 84087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner : Info(info), Result(result) {} 841f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 8423f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar bool Success(const llvm::APSInt &SI, const Expr *E) { 8432ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 8442ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 84530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.isSigned() == E->getType()->isSignedIntegerType() && 8463f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 84730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 8483f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 84930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(SI); 8503f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 8513f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 8523f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 853131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(const llvm::APInt &I, const Expr *E) { 8542ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 8552ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 85630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(I.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 8573f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 85830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(APSInt(I)); 85930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt().setIsUnsigned(E->getType()->isUnsignedIntegerType()); 860131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 861131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 862131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 863131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(uint64_t Value, const Expr *E) { 8642ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 8652ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 86630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(Info.Ctx.MakeIntValue(Value, E->getType())); 867131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 868131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 869131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 87082206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Error(SourceLocation L, diag::kind D, const Expr *E) { 87132fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // Take the first error. 87254da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson if (Info.EvalResult.Diag == 0) { 87354da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.DiagLoc = L; 87454da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.Diag = D; 87582206e267ce6cc709797127616f64672d255b310Anders Carlsson Info.EvalResult.DiagExpr = E; 87632fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 87754176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return false; 8787a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner } 8791eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 880f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 881f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner // Visitor Methods 882f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 8831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 88432fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitStmt(Stmt *) { 88532fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner assert(0 && "This should be called on integers, stmts are not integers"); 88632fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner return false; 88732fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 8881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 88932fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitExpr(Expr *E) { 8900e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 891f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner } 8921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 893b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 894f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 8954c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitIntegerLiteral(const IntegerLiteral *E) { 896131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 8974c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 8984c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCharacterLiteral(const CharacterLiteral *E) { 899131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 9004c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 9014c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitTypesCompatibleExpr(const TypesCompatibleExpr *E) { 902ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // Per gcc docs "this built-in function ignores top level 903ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // qualifiers". We need to use the canonical version to properly 904ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // be able to strip CRV qualifiers from the type. 905ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T0 = Info.Ctx.getCanonicalType(E->getArgType1()); 906ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T1 = Info.Ctx.getCanonicalType(E->getArgType2()); 9071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(Info.Ctx.typesAreCompatible(T0.getUnqualifiedType(), 908131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar T1.getUnqualifiedType()), 909131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 9104c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 911043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 912043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool CheckReferencedDecl(const Expr *E, const Decl *D); 913043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitDeclRefExpr(const DeclRefExpr *E) { 914043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return CheckReferencedDecl(E, E->getDecl()); 915043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 916043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitMemberExpr(const MemberExpr *E) { 917043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (CheckReferencedDecl(E, E->getMemberDecl())) { 918043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman // Conservatively assume a MemberExpr will have side-effects 919043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman Info.EvalResult.HasSideEffects = true; 920043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return true; 921043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 922043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return false; 923043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 924043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 925c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman bool VisitCallExpr(CallExpr *E); 926b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitBinaryOperator(const BinaryOperator *E); 9278ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor bool VisitOffsetOfExpr(const OffsetOfExpr *E); 928b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitUnaryOperator(const UnaryOperator *E); 929ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes bool VisitConditionalOperator(const ConditionalOperator *E); 930f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 931a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool VisitCastExpr(CastExpr* E); 9320518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl bool VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E); 9330518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 9343068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 935131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 9363068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 9371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9383f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson bool VisitGNUNullExpr(const GNUNullExpr *E) { 939131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 9403f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson } 9411eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 942ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor bool VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E) { 943131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 9443068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 9453068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 946664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { 947664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 948664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman } 949664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 95064b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) { 9515e03f9ea8174ae588c5e69ec6b5ef4c68f8fd766Douglas Gregor return Success(E->EvaluateTrait(Info.Ctx), E); 95264b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl } 95364b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl 954ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) { 955ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman return Visit(E->getChosenSubExpr(Info.Ctx)); 956ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman } 957ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 958722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman bool VisitUnaryReal(const UnaryOperator *E); 959664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitUnaryImag(const UnaryOperator *E); 960664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 961fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattnerprivate: 9628b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfExpr(const Expr *E); 9638b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfType(QualType T); 96442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall static QualType GetObjectType(const Expr *E); 96542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall bool TryEvaluateBuiltinObjectSize(CallExpr *E); 966664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman // FIXME: Missing: array subscript of vector, member of vector 967f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner}; 968f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 969f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 97069ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateIntegerOrLValue(const Expr* E, APValue &Result, EvalInfo &Info) { 9712ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType()); 97269ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return IntExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 97369ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar} 97469ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 97569ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateInteger(const Expr* E, APSInt &Result, EvalInfo &Info) { 9762ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType()); 9777db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall 97830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue Val; 97969ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (!EvaluateIntegerOrLValue(E, Val, Info) || !Val.isInt()) 98030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 98130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = Val.getInt(); 98230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return true; 983f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 984f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 985043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedmanbool IntExprEvaluator::CheckReferencedDecl(const Expr* E, const Decl* D) { 9864c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Enums are integer constant exprs. 98729a7f3342c3c6dd15d914c61ae22246c36d51ce7Eli Friedman if (const EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(D)) 98829a7f3342c3c6dd15d914c61ae22246c36d51ce7Eli Friedman return Success(ECD->getInitVal(), E); 989b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 990b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl // In C++, const, non-volatile integers initialized with ICEs are ICEs. 991e1646da3bb0fe97b372e5fe8cefc537b22048fc4Eli Friedman // In C, they can also be folded, although they are not ICEs. 992cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor if (Info.Ctx.getCanonicalType(E->getType()).getCVRQualifiers() 993cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor == Qualifiers::Const) { 994f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson 995f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson if (isa<ParmVarDecl>(D)) 996f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 997f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson 998043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 99931310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl if (const Expr *Init = VD->getAnyInitializer()) { 1000c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (APValue *V = VD->getEvaluatedValue()) { 1001c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (V->isInt()) 1002c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Success(V->getInt(), E); 1003c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1004c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman } 1005c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 1006c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (VD->isEvaluatingValue()) 1007c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1008c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 1009c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatingValue(); 1010c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 101178d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor if (Visit(const_cast<Expr*>(Init))) { 101278d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor // Cache the evaluated value in the variable declaration. 1013c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatedValue(Result); 101478d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return true; 101578d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 101678d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor 1017c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatedValue(APValue()); 101878d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return false; 101978d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 1020b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 1021b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 1022b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 10234c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Otherwise, random variable references are not constants. 10240e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 10254c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 10264c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner 1027a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way 1028a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// as GCC. 1029a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattnerstatic int EvaluateBuiltinClassifyType(const CallExpr *E) { 1030a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // The following enum mimics the values returned by GCC. 10317c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl // FIXME: Does GCC differ between lvalue and rvalue references here? 1032a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enum gcc_type_class { 1033a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner no_type_class = -1, 1034a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner void_type_class, integer_type_class, char_type_class, 1035a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enumeral_type_class, boolean_type_class, 1036a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner pointer_type_class, reference_type_class, offset_type_class, 1037a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner real_type_class, complex_type_class, 1038a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner function_type_class, method_type_class, 1039a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner record_type_class, union_type_class, 1040a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner array_type_class, string_type_class, 1041a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner lang_type_class 1042a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner }; 10431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If no argument was supplied, default to "no_type_class". This isn't 1045a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // ideal, however it is what gcc does. 1046a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (E->getNumArgs() == 0) 1047a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return no_type_class; 10481eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1049a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner QualType ArgTy = E->getArg(0)->getType(); 1050a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (ArgTy->isVoidType()) 1051a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return void_type_class; 1052a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isEnumeralType()) 1053a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return enumeral_type_class; 1054a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isBooleanType()) 1055a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return boolean_type_class; 1056a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isCharType()) 1057a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return string_type_class; // gcc doesn't appear to use char_type_class 1058a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isIntegerType()) 1059a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return integer_type_class; 1060a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isPointerType()) 1061a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return pointer_type_class; 1062a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isReferenceType()) 1063a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return reference_type_class; 1064a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isRealType()) 1065a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return real_type_class; 1066a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isComplexType()) 1067a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return complex_type_class; 1068a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isFunctionType()) 1069a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return function_type_class; 1070fb87b89fc9eb103e19fb8e4b925c23f0bd091b99Douglas Gregor else if (ArgTy->isStructureOrClassType()) 1071a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return record_type_class; 1072a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 1073a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 1074a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isArrayType()) 1075a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return array_type_class; 1076a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 1077a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 1078a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else // FIXME: offset_type_class, method_type_class, & lang_type_class? 1079a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner assert(0 && "CallExpr::isBuiltinClassifyType(): unimplemented type"); 1080a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return -1; 1081a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner} 1082a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 108342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// Retrieves the "underlying object type" of the given expression, 108442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// as used by __builtin_object_size. 108542c8f87eb60958170c46767273bf93e6c96125bfJohn McCallQualType IntExprEvaluator::GetObjectType(const Expr *E) { 108642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 108742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) 108842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return VD->getType(); 108942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } else if (isa<CompoundLiteralExpr>(E)) { 109042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return E->getType(); 109142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } 109242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 109342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return QualType(); 109442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 109542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 109642c8f87eb60958170c46767273bf93e6c96125bfJohn McCallbool IntExprEvaluator::TryEvaluateBuiltinObjectSize(CallExpr *E) { 109742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // TODO: Perhaps we should let LLVM lower this? 109842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall LValue Base; 109942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!EvaluatePointer(E->getArg(0), Base, Info)) 110042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 110142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 110242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // If we can prove the base is null, lower to zero now. 110342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall const Expr *LVBase = Base.getLValueBase(); 110442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!LVBase) return Success(0, E); 110542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 110642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall QualType T = GetObjectType(LVBase); 110742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (T.isNull() || 110842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isIncompleteType() || 110942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall !T->isObjectType() || 111042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isVariablyModifiedType() || 111142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isDependentType()) 111242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 111342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 111442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Size = Info.Ctx.getTypeSizeInChars(T); 111542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Offset = Base.getLValueOffset(); 111642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 111742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!Offset.isNegative() && Offset <= Size) 111842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size -= Offset; 111942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall else 112042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size = CharUnits::Zero(); 112142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return Success(Size.getQuantity(), E); 112242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 112342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 1124c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedmanbool IntExprEvaluator::VisitCallExpr(CallExpr *E) { 11253c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 1126019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner default: 11270e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 112864eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 112964eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump case Builtin::BI__builtin_object_size: { 113042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (TryEvaluateBuiltinObjectSize(E)) 113142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 113264eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 1133b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // If evaluating the argument has side-effects we can't determine 1134b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // the size of the object and lower it to unknown now. 1135393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (E->getArg(0)->HasSideEffects(Info.Ctx)) { 11363f27b384801de26ce7efaa395699b42719372f24Benjamin Kramer if (E->getArg(1)->EvaluateAsInt(Info.Ctx).getZExtValue() <= 1) 1137cf184655319cf7a5b811067cff9d26a5741fd161Chris Lattner return Success(-1ULL, E); 113864eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Success(0, E); 113964eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 1140c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 114164eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 114264eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 114364eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 1144019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_classify_type: 1145131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(EvaluateBuiltinClassifyType(E), E); 11461eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11474bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson case Builtin::BI__builtin_constant_p: 1148019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // __builtin_constant_p always has one operand: it returns true if that 1149019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // operand can be folded, false otherwise. 1150131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getArg(0)->isEvaluatable(Info.Ctx), E); 115121fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner 115221fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner case Builtin::BI__builtin_eh_return_data_regno: { 115321fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner int Operand = E->getArg(0)->EvaluateAsInt(Info.Ctx).getZExtValue(); 115421fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner Operand = Info.Ctx.Target.getEHDataRegisterNumber(Operand); 115521fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner return Success(Operand, E); 115621fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner } 1157c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman 1158c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman case Builtin::BI__builtin_expect: 1159c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman return Visit(E->getArg(0)); 1160019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 11614c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 1162f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 1163b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 1164a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == BinaryOperator::Comma) { 1165027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson if (!Visit(E->getRHS())) 1166027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return false; 11674fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson 116833ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // If we can't evaluate the LHS, it might have side effects; 116933ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // conservatively mark it. 117033ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 117133ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman Info.EvalResult.HasSideEffects = true; 1172c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner 1173027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return true; 1174a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1175a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1176a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->isLogicalOp()) { 1177a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // These need to be handled specially because the operands aren't 1178a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // necessarily integral 1179fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool lhsResult, rhsResult; 11801eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1181fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getLHS(), lhsResult, Info)) { 118251fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // We were able to evaluate the LHS, see if we can get away with not 118351fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // evaluating the RHS: 0 && X -> 0, 1 || X -> 1 118433ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman if (lhsResult == (E->getOpcode() == BinaryOperator::LOr)) 11853f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(lhsResult, E); 1186a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1187fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 11884bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson if (E->getOpcode() == BinaryOperator::LOr) 1189131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult || rhsResult, E); 11904bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson else 1191131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult && rhsResult, E); 11924bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 11934bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } else { 1194fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 11954bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // We can't evaluate the LHS; however, sometimes the result 11964bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // is determined by the RHS: X && 0 -> 0, X || 1 -> 1. 11971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (rhsResult == (E->getOpcode() == BinaryOperator::LOr) || 1198fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson !rhsResult == (E->getOpcode() == BinaryOperator::LAnd)) { 1199131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // Since we weren't able to evaluate the left hand side, it 1200fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // must have had side effects. 1201fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson Info.EvalResult.HasSideEffects = true; 1202131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 1203131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(rhsResult, E); 12044bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 12054bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 1206a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1207a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1208a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1209c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner } 121054176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 1211286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType LHSTy = E->getLHS()->getType(); 1212286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType RHSTy = E->getRHS()->getType(); 12134087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12144087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHSTy->isAnyComplexType()) { 12154087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar assert(RHSTy->isAnyComplexType() && "Invalid comparison"); 1216f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS, RHS; 12174087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12184087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getLHS(), LHS, Info)) 12194087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 12204087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12214087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 12224087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 12234087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12244087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHS.isComplexFloat()) { 12251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_r = 12264087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatReal().compare(RHS.getComplexFloatReal()); 12271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_i = 12284087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatImag().compare(RHS.getComplexFloatImag()); 12294087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12304087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 1231131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((CR_r == APFloat::cmpEqual && 1232131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpEqual), E); 1233131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 1234131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 1235131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid complex comparison."); 12361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(((CR_r == APFloat::cmpGreaterThan || 1237fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpLessThan || 1238fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpUnordered) || 12391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (CR_i == APFloat::cmpGreaterThan || 1240fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpLessThan || 1241fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpUnordered)), E); 1242131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 12434087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } else { 12444087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (E->getOpcode() == BinaryOperator::EQ) 1245131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() == RHS.getComplexIntReal() && 1246131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() == RHS.getComplexIntImag()), E); 1247131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 1248131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar assert(E->getOpcode() == BinaryOperator::NE && 1249131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid compex comparison."); 1250131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() != RHS.getComplexIntReal() || 1251131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() != RHS.getComplexIntImag()), E); 1252131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 12534087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 12544087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 12551eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1256286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (LHSTy->isRealFloatingType() && 1257286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson RHSTy->isRealFloatingType()) { 1258286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat RHS(0.0), LHS(0.0); 12591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1260286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1261286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 12621eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1263286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getLHS(), LHS, Info)) 1264286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 12651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1266286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat::cmpResult CR = LHS.compare(RHS); 1267529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson 1268286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson switch (E->getOpcode()) { 1269286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson default: 1270286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson assert(0 && "Invalid binary operator!"); 1271286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LT: 1272131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan, E); 1273286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GT: 1274131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan, E); 1275286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::LE: 1276131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan || CR == APFloat::cmpEqual, E); 1277286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::GE: 12781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan || CR == APFloat::cmpEqual, 1279131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 1280286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::EQ: 1281131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpEqual, E); 1282286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson case BinaryOperator::NE: 12831eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan 1284fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpLessThan 1285fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpUnordered, E); 1286286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 1287286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 12881eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1289ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (LHSTy->isPointerType() && RHSTy->isPointerType()) { 1290ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::Sub || E->isEqualityOp()) { 1291efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LHSValue; 12923068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getLHS(), LHSValue, Info)) 12933068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1294a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1295efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue RHSValue; 12963068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getRHS(), RHSValue, Info)) 12973068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1298a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 12995bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // Reject any bases from the normal codepath; we special-case comparisons 13005bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // to null. 13015bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (LHSValue.getLValueBase()) { 13025bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 13035bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 1304a73058324197b7bdfd19307965954f626e26199dKen Dyck if (RHSValue.getLValueBase() || !RHSValue.getLValueOffset().isZero()) 13055bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13065bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 13075bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(LHSValue, bres)) 13085bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13095bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return Success(bres ^ (E->getOpcode() == BinaryOperator::EQ), E); 13105bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } else if (RHSValue.getLValueBase()) { 13115bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 13125bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 1313a73058324197b7bdfd19307965954f626e26199dKen Dyck if (LHSValue.getLValueBase() || !LHSValue.getLValueOffset().isZero()) 13145bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13155bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 13165bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(RHSValue, bres)) 13175bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13185bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return Success(bres ^ (E->getOpcode() == BinaryOperator::EQ), E); 13195bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } 1320a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1321ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::Sub) { 13224992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType Type = E->getLHS()->getType(); 13234992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType ElementType = Type->getAs<PointerType>()->getPointeeType(); 13243068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 1325a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits ElementSize = CharUnits::One(); 1326ce1bca73aef9bbf6359ab8420278203dda81a054Eli Friedman if (!ElementType->isVoidType() && !ElementType->isFunctionType()) 1327a73058324197b7bdfd19307965954f626e26199dKen Dyck ElementSize = Info.Ctx.getTypeSizeInChars(ElementType); 1328a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1329a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Diff = LHSValue.getLValueOffset() - 1330a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSValue.getLValueOffset(); 1331a73058324197b7bdfd19307965954f626e26199dKen Dyck return Success(Diff / ElementSize, E); 1332ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1333ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman bool Result; 1334ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (E->getOpcode() == BinaryOperator::EQ) { 1335ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() == RHSValue.getLValueOffset(); 1336267c0ab1b9a15768f3f15abbfc40ce344751c78bEli Friedman } else { 1337ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() != RHSValue.getLValueOffset(); 1338ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1339ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman return Success(Result, E); 13403068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 13413068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 13422ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!LHSTy->isIntegralOrEnumerationType() || 13432ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor !RHSTy->isIntegralOrEnumerationType()) { 1344a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // We can't continue from here for non-integral types, and they 1345a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // could potentially confuse the following operations. 1346a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1347a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1348a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1349a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // The LHS of a constant expr is always evaluated and needed. 135030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Visit(E->getLHS())) 1351a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; // error in subexpression. 1352d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman 135342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APValue RHSVal; 135442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!EvaluateIntegerOrLValue(E->getRHS(), RHSVal, Info)) 135530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 135642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 135742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like (unsigned long)&a + 4. 135842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->isAdditiveOp() && Result.isLValue() && RHSVal.isInt()) { 1359a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Offset = Result.getLValueOffset(); 1360a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits AdditionalOffset = CharUnits::fromQuantity( 1361a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSVal.getInt().getZExtValue()); 136242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->getOpcode() == BinaryOperator::Add) 1363a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset += AdditionalOffset; 136442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman else 1365a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset -= AdditionalOffset; 1366a73058324197b7bdfd19307965954f626e26199dKen Dyck Result = APValue(Result.getLValueBase(), Offset); 136742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 136842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 136942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 137042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like 4 + (unsigned long)&a 137142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->getOpcode() == BinaryOperator::Add && 137242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman RHSVal.isLValue() && Result.isInt()) { 1373a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Offset = RHSVal.getLValueOffset(); 1374a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset += CharUnits::fromQuantity(Result.getInt().getZExtValue()); 1375a73058324197b7bdfd19307965954f626e26199dKen Dyck Result = APValue(RHSVal.getLValueBase(), Offset); 137642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 137742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 137842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 137942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // All the following cases expect both operands to be an integer 138042edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!Result.isInt() || !RHSVal.isInt()) 1381b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1382a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 138342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APSInt& RHS = RHSVal.getInt(); 138442edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 1385a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson switch (E->getOpcode()) { 138632fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner default: 13870e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 138830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Mul: return Success(Result.getInt() * RHS, E); 138930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Add: return Success(Result.getInt() + RHS, E); 139030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Sub: return Success(Result.getInt() - RHS, E); 139130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::And: return Success(Result.getInt() & RHS, E); 139230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Xor: return Success(Result.getInt() ^ RHS, E); 139330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::Or: return Success(Result.getInt() | RHS, E); 1394a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Div: 139554176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 13960e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 139730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() / RHS, E); 1398a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson case BinaryOperator::Rem: 139954176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 14000e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 140130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() % RHS, E); 14023f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shl: { 140354176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner // FIXME: Warn about out of range shift amounts! 14041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 140530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 140630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() << SA, E); 14073f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 14083f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar case BinaryOperator::Shr: { 14091eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 141030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 141130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() >> SA, E); 14123f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 14131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 141430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LT: return Success(Result.getInt() < RHS, E); 141530c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GT: return Success(Result.getInt() > RHS, E); 141630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::LE: return Success(Result.getInt() <= RHS, E); 141730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::GE: return Success(Result.getInt() >= RHS, E); 141830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::EQ: return Success(Result.getInt() == RHS, E); 141930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar case BinaryOperator::NE: return Success(Result.getInt() != RHS, E); 1420b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 1421a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 1422a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 1423ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopesbool IntExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 1424a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes bool Cond; 1425a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes if (!HandleConversionToBool(E->getCond(), Cond, Info)) 1426ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes return false; 1427ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 1428a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 1429ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes} 1430ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 14318b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfType(QualType T) { 14325d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 14335d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 14345d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 14355d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 14365d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = T->getAs<ReferenceType>()) 14375d484e8cf710207010720589d89602233de61d01Sebastian Redl T = Ref->getPointeeType(); 14385d484e8cf710207010720589d89602233de61d01Sebastian Redl 1439e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the alignment. 1440e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner unsigned CharSize = Info.Ctx.Target.getCharWidth(); 144118857644059c45da6776f1a288eec7b4cf3a844aDouglas Gregor 14422be586108bb401019647791feca19ea03fd477ceEli Friedman // __alignof is defined to return the preferred alignment. 14438b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return CharUnits::fromQuantity( 14448b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck Info.Ctx.getPreferredTypeAlign(T.getTypePtr()) / CharSize); 1445e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1446e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 14478b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfExpr(const Expr *E) { 1448af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner E = E->IgnoreParens(); 1449af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1450af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // alignof decl is always accepted, even if it doesn't make sense: we default 14511eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // to 1 in those cases. 1452af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 14538b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(DRE->getDecl(), 14548b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 1455a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1456af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) 14578b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(ME->getMemberDecl(), 14588b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 1459af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1460e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(E->getType()); 1461e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1462e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1463e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 14640518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// VisitSizeAlignOfExpr - Evaluate a sizeof or alignof with a result as the 14650518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// expression's type. 14660518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redlbool IntExprEvaluator::VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E) { 1467e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Handle alignof separately. 1468e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!E->isSizeOf()) { 1469e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (E->isArgumentType()) 14708b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Success(GetAlignOfType(E->getArgumentType()).getQuantity(), E); 1471e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner else 14728b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Success(GetAlignOfExpr(E->getArgumentExpr()).getQuantity(), E); 1473e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner } 1474a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 14750518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType SrcTy = E->getTypeOfArgument(); 14765d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 14775d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 14785d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 14795d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 14805d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = SrcTy->getAs<ReferenceType>()) 14815d484e8cf710207010720589d89602233de61d01Sebastian Redl SrcTy = Ref->getPointeeType(); 14820518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 1483131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc 1484131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // extension. 1485131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar if (SrcTy->isVoidType() || SrcTy->isFunctionType()) 1486131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(1, E); 1487a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1488fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. 1489e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!SrcTy->isConstantSizeType()) 1490fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner return false; 1491f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 1492e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the size. 1493199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck return Success(Info.Ctx.getTypeSizeInChars(SrcTy).getQuantity(), E); 1494fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner} 1495fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 14968ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregorbool IntExprEvaluator::VisitOffsetOfExpr(const OffsetOfExpr *E) { 14978ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits Result; 14988ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor unsigned n = E->getNumComponents(); 14998ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor OffsetOfExpr* OOE = const_cast<OffsetOfExpr*>(E); 15008ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (n == 0) 15018ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15028ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor QualType CurrentType = E->getTypeSourceInfo()->getType(); 15038ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor for (unsigned i = 0; i != n; ++i) { 15048ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor OffsetOfExpr::OffsetOfNode ON = OOE->getComponent(i); 15058ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor switch (ON.getKind()) { 15068ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Array: { 15078ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Expr *Idx = OOE->getIndexExpr(ON.getArrayExprIndex()); 15088ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor APSInt IdxResult; 15098ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!EvaluateInteger(Idx, IdxResult, Info)) 15108ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15118ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ArrayType *AT = Info.Ctx.getAsArrayType(CurrentType); 15128ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!AT) 15138ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15148ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = AT->getElementType(); 15158ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits ElementSize = Info.Ctx.getTypeSizeInChars(CurrentType); 15168ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Result += IdxResult.getSExtValue() * ElementSize; 15178ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 15188ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 15198ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 15208ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Field: { 15218ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor FieldDecl *MemberDecl = ON.getField(); 15228ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 15238ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!RT) 15248ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15258ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor RecordDecl *RD = RT->getDecl(); 15268ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 15278ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor unsigned i = 0; 15288ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor // FIXME: It would be nice if we didn't have to loop here! 15298ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor for (RecordDecl::field_iterator Field = RD->field_begin(), 15308ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor FieldEnd = RD->field_end(); 15318ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Field != FieldEnd; (void)++Field, ++i) { 15328ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (*Field == MemberDecl) 15338ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 15348ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 1535cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor assert(i < RL.getFieldCount() && "offsetof field in wrong type"); 1536cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor Result += CharUnits::fromQuantity( 1537cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor RL.getFieldOffset(i) / Info.Ctx.getCharWidth()); 15388ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = MemberDecl->getType().getNonReferenceType(); 15398ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 15408ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 15418ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 15428ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Identifier: 15438ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor llvm_unreachable("dependent __builtin_offsetof"); 1544cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1545cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1546cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor case OffsetOfExpr::OffsetOfNode::Base: { 1547cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CXXBaseSpecifier *BaseSpec = ON.getBase(); 1548cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (BaseSpec->isVirtual()) 1549cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1550cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1551cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the layout of the class whose base we are looking into. 1552cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 1553cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (!RT) 1554cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1555cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor RecordDecl *RD = RT->getDecl(); 1556cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 1557cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1558cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the base class itself. 1559cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CurrentType = BaseSpec->getType(); 1560cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *BaseRT = CurrentType->getAs<RecordType>(); 1561cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (!BaseRT) 1562cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1563cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1564cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Add the offset to the base. 1565cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor Result += CharUnits::fromQuantity( 1566cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor RL.getBaseClassOffset(cast<CXXRecordDecl>(BaseRT->getDecl())) 1567cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor / Info.Ctx.getCharWidth()); 1568cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor break; 1569cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor } 15708ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 15718ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 15728ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return Success(Result.getQuantity(), E); 15738ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor} 15748ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 1575b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 15764c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Special case unary operators that do not need their subexpression 15774c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // evaluated. offsetof/sizeof/alignof are all special. 157835183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (E->isOffsetOfOp()) { 157935183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman // The AST for offsetof is defined in such a way that we can just 158035183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman // directly Evaluate it as an l-value. 1581efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 158235183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (!EvaluateLValue(E->getSubExpr(), LV, Info)) 15838ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 158435183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman if (LV.getLValueBase()) 15858ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 1586a73058324197b7bdfd19307965954f626e26199dKen Dyck return Success(LV.getLValueOffset().getQuantity(), E); 158735183aca180a2b9b2c637cd625a40a7e147d6a32Eli Friedman } 15888ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 1589a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->getOpcode() == UnaryOperator::LNot) { 1590a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // LNot's operand isn't necessarily an integer, so we handle it specially. 1591a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman bool bres; 1592a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!HandleConversionToBool(E->getSubExpr(), bres, Info)) 1593a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1594131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(!bres, E); 1595a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1596a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 15974fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar // Only handle integral operations... 15982ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!E->getSubExpr()->getType()->isIntegralOrEnumerationType()) 15994fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar return false; 16004fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar 160187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner // Get the operand value into 'Result'. 160287eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!Visit(E->getSubExpr())) 160375a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner return false; 1604a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 160575a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner switch (E->getOpcode()) { 16064c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner default: 160775a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 160875a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // See C99 6.6p3. 16090e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 161075a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Extension: 16114c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // FIXME: Should extension allow i-c-e extension expressions in its scope? 16124c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // If so, we could clear the diagnostic ID. 16133f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 161475a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Plus: 16151eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // The result is always just the subexpr. 16163f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 161775a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Minus: 161830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 161930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(-Result.getInt(), E); 162075a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner case UnaryOperator::Not: 162130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 162230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(~Result.getInt(), E); 162306a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson } 1624a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 16251eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1626732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// HandleCast - This is used to evaluate implicit or explicit casts where the 1627732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// result type is integer. 1628a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarbool IntExprEvaluator::VisitCastExpr(CastExpr *E) { 162982206e267ce6cc709797127616f64672d255b310Anders Carlsson Expr *SubExpr = E->getSubExpr(); 163082206e267ce6cc709797127616f64672d255b310Anders Carlsson QualType DestType = E->getType(); 1631b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar QualType SrcType = SubExpr->getType(); 163282206e267ce6cc709797127616f64672d255b310Anders Carlsson 16334efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (DestType->isBooleanType()) { 16344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 16354efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(SubExpr, BoolResult, Info)) 16364efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1637131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(BoolResult, E); 16384efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 16394efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1640a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson // Handle simple integer->integer casts. 16412ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (SrcType->isIntegralOrEnumerationType()) { 1642732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!Visit(SubExpr)) 1643b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1644a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1645be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!Result.isInt()) { 1646be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // Only allow casts of lvalues if they are lossless. 1647be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return Info.Ctx.getTypeSize(DestType) == Info.Ctx.getTypeSize(SrcType); 1648be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 164930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 1650dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, 165130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt(), Info.Ctx), E); 1652732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner } 16531eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1654732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner // FIXME: Clean this up! 1655b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (SrcType->isPointerType()) { 1656efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 165787eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(SubExpr, LV, Info)) 1658b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 16594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1660dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (LV.getLValueBase()) { 1661dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar // Only allow based lvalue casts if they are lossless. 1662dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(SrcType)) 1663dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return false; 1664dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar 1665efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result); 1666dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return true; 1667dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar } 16684efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1669a73058324197b7bdfd19307965954f626e26199dKen Dyck APSInt AsInt = Info.Ctx.MakeIntValue(LV.getLValueOffset().getQuantity(), 1670a73058324197b7bdfd19307965954f626e26199dKen Dyck SrcType); 1671dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, AsInt, Info.Ctx), E); 16722bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 16734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1674be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (SrcType->isArrayType() || SrcType->isFunctionType()) { 1675be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // This handles double-conversion cases, where there's both 1676be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // an l-value promotion and an implicit conversion to int. 1677efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 1678be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!EvaluateLValue(SubExpr, LV, Info)) 1679be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1680be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1681be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(Info.Ctx.VoidPtrTy)) 1682be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1683be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1684efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result); 1685be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return true; 1686be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 1687be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 16881725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (SrcType->isAnyComplexType()) { 1689f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue C; 16901725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (!EvaluateComplex(SubExpr, C, Info)) 16911725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return false; 16921725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (C.isComplexFloat()) 16931725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleFloatToIntCast(DestType, SrcType, 16941725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexFloatReal(), Info.Ctx), 16951725f683432715e5afe34d476024bd6f16eac3fcEli Friedman E); 16961725f683432715e5afe34d476024bd6f16eac3fcEli Friedman else 16971725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleIntToIntCast(DestType, SrcType, 16981725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexIntReal(), Info.Ctx), E); 16991725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 17002217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // FIXME: Handle vectors 17012217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1702b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (!SrcType->isRealFloatingType()) 17030e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1704732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 1705d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat F(0.0); 1706d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(SubExpr, F, Info)) 17070e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 17081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1709b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar return Success(HandleFloatToIntCast(DestType, SrcType, F, Info.Ctx), E); 1710a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 17112bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 1712722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedmanbool IntExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 1713722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 1714f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 1715722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1716722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1717722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntReal(), E); 1718722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1719722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1720722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Visit(E->getSubExpr()); 1721722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman} 1722722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1723664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedmanbool IntExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 1724722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isComplexIntegerType()) { 1725f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 1726722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1727722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1728722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntImag(), E); 1729722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1730722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1731664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 1732664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman Info.EvalResult.HasSideEffects = true; 1733664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 1734664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman} 1735664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 1736f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1737d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman// Float Evaluation 1738d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1739d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1740d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmannamespace { 1741770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass FloatExprEvaluator 1742d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : public StmtVisitor<FloatExprEvaluator, bool> { 1743d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman EvalInfo &Info; 1744d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat &Result; 1745d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanpublic: 1746d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman FloatExprEvaluator(EvalInfo &info, APFloat &result) 1747d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : Info(info), Result(result) {} 1748d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1749d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitStmt(Stmt *S) { 1750d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1751d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1752d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1753d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 1754019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner bool VisitCallExpr(const CallExpr *E); 1755d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 17565db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar bool VisitUnaryOperator(const UnaryOperator *E); 1757d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 1758d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitFloatingLiteral(const FloatingLiteral *E); 17594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCastExpr(CastExpr *E); 1760ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor bool VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E); 176167f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman bool VisitConditionalOperator(ConditionalOperator *E); 17622217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1763ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) 1764ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 1765ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitUnaryExtension(const UnaryOperator *E) 1766ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 1767abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryReal(const UnaryOperator *E); 1768abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryImag(const UnaryOperator *E); 1769ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 1770abd3a857ace59100305790545d1baae5877b8945John McCall // FIXME: Missing: array subscript of vector, member of vector, 1771abd3a857ace59100305790545d1baae5877b8945John McCall // ImplicitValueInitExpr 1772d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman}; 1773d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} // end anonymous namespace 1774d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1775d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) { 17767db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall assert(E->getType()->isRealFloatingType()); 1777d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return FloatExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 1778d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1779d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1780db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCallstatic bool TryEvaluateBuiltinNaN(ASTContext &Context, 1781db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall QualType ResultTy, 1782db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const Expr *Arg, 1783db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall bool SNaN, 1784db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APFloat &Result) { 1785db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const StringLiteral *S = dyn_cast<StringLiteral>(Arg->IgnoreParenCasts()); 1786db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (!S) return false; 1787db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1788db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const llvm::fltSemantics &Sem = Context.getFloatTypeSemantics(ResultTy); 1789db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1790db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APInt fill; 1791db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1792db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall // Treat empty strings as if they were zero. 1793db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (S->getString().empty()) 1794db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall fill = llvm::APInt(32, 0); 1795db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else if (S->getString().getAsInteger(0, fill)) 1796db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return false; 1797db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1798db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (SNaN) 1799db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getSNaN(Sem, false, &fill); 1800db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else 1801db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getQNaN(Sem, false, &fill); 1802db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return true; 1803db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall} 1804db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1805019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattnerbool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) { 18063c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 180734a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner default: return false; 1808019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_val: 1809019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_valf: 1810019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_vall: 1811019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inf: 1812019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inff: 18137cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar case Builtin::BI__builtin_infl: { 18147cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 18157cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 181634a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner Result = llvm::APFloat::getInf(Sem); 181734a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner return true; 18187cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar } 18191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1820db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nans: 1821db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansf: 1822db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansl: 1823db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 1824db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall true, Result); 1825db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 18269e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nan: 18279e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanf: 18289e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanl: 18294572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump // If this is __builtin_nan() turn this into a nan, otherwise we 18309e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // can't constant fold it. 1831db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 1832db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall false, Result); 18335db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 18345db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabs: 18355db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsf: 18365db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsl: 18375db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info)) 18385db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 18391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18405db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (Result.isNegative()) 18415db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 18425db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 18435db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 18441eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysign: 18451eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysignf: 18465db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignl: { 18475db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.); 18485db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info) || 18495db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar !EvaluateFloat(E->getArg(1), RHS, Info)) 18505db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 18515db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.copySign(RHS); 18525db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 18535db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 1854019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 1855019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner} 1856019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 1857abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 1858abd3a857ace59100305790545d1baae5877b8945John McCall ComplexValue CV; 1859abd3a857ace59100305790545d1baae5877b8945John McCall if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 1860abd3a857ace59100305790545d1baae5877b8945John McCall return false; 1861abd3a857ace59100305790545d1baae5877b8945John McCall Result = CV.FloatReal; 1862abd3a857ace59100305790545d1baae5877b8945John McCall return true; 1863abd3a857ace59100305790545d1baae5877b8945John McCall} 1864abd3a857ace59100305790545d1baae5877b8945John McCall 1865abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 1866abd3a857ace59100305790545d1baae5877b8945John McCall ComplexValue CV; 1867abd3a857ace59100305790545d1baae5877b8945John McCall if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 1868abd3a857ace59100305790545d1baae5877b8945John McCall return false; 1869abd3a857ace59100305790545d1baae5877b8945John McCall Result = CV.FloatImag; 1870abd3a857ace59100305790545d1baae5877b8945John McCall return true; 1871abd3a857ace59100305790545d1baae5877b8945John McCall} 1872abd3a857ace59100305790545d1baae5877b8945John McCall 18735db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbarbool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 1874a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes if (E->getOpcode() == UnaryOperator::Deref) 1875a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes return false; 1876a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes 18775db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getSubExpr(), Result, Info)) 18785db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 18795db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 18805db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar switch (E->getOpcode()) { 18815db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar default: return false; 18821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case UnaryOperator::Plus: 18835db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 18845db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case UnaryOperator::Minus: 18855db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 18865db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 18875db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 18885db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar} 1889019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 1890d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 18917f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (E->getOpcode() == BinaryOperator::Comma) { 18927f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!EvaluateFloat(E->getRHS(), Result, Info)) 18937f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return false; 18947f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 18957f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // If we can't evaluate the LHS, it might have side effects; 18967f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // conservatively mark it. 18977f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 18987f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman Info.EvalResult.HasSideEffects = true; 18997f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 19007f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return true; 19017f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman } 19027f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 1903d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // FIXME: Diagnostics? I really don't understand how the warnings 1904d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // and errors are supposed to work. 19055db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.0); 1906d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getLHS(), Result, Info)) 1907d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1908d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1909d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1910d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1911d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman switch (E->getOpcode()) { 1912d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman default: return false; 1913d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Mul: 1914d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.multiply(RHS, APFloat::rmNearestTiesToEven); 1915d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1916d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Add: 1917d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.add(RHS, APFloat::rmNearestTiesToEven); 1918d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1919d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Sub: 1920d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.subtract(RHS, APFloat::rmNearestTiesToEven); 1921d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1922d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman case BinaryOperator::Div: 1923d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.divide(RHS, APFloat::rmNearestTiesToEven); 1924d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1925d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1926d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1927d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1928d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) { 1929d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result = E->getValue(); 1930d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 1931d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1932d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 19334efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCastExpr(CastExpr *E) { 19344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* SubExpr = E->getSubExpr(); 19351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19362ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (SubExpr->getType()->isIntegralOrEnumerationType()) { 19374efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 19383f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!EvaluateInteger(SubExpr, IntResult, Info)) 19394efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 19401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result = HandleIntToFloatCast(E->getType(), SubExpr->getType(), 1941a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar IntResult, Info.Ctx); 19424efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 19434efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 19444efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isRealFloatingType()) { 19454efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!Visit(SubExpr)) 19464efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1947a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(E->getType(), SubExpr->getType(), 1948a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result, Info.Ctx); 19494efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 19504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 19512217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // FIXME: Handle complex types 19524efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 19534efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 19544efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 19554efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1956ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregorbool FloatExprEvaluator::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) { 19574efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(E->getType())); 19584efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 19594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 19604efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 196167f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedmanbool FloatExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 196267f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman bool Cond; 196367f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman if (!HandleConversionToBool(E->getCond(), Cond, Info)) 196467f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman return false; 196567f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman 196667f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 196767f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman} 196867f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman 1969d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1970a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar// Complex Evaluation (for float and integer) 19719ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 19729ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 19739ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonnamespace { 1974770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass ComplexExprEvaluator 1975f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall : public StmtVisitor<ComplexExprEvaluator, bool> { 19769ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson EvalInfo &Info; 1977f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue &Result; 19781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19799ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonpublic: 1980f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexExprEvaluator(EvalInfo &info, ComplexValue &Result) 1981f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall : Info(info), Result(Result) {} 19821eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 19839ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 19849ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson // Visitor Methods 19859ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 19869ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 1987f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool VisitStmt(Stmt *S) { 1988f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 19899ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 19901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1991f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 19929ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 1993f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool VisitImaginaryLiteral(ImaginaryLiteral *E) { 1994a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Expr* SubExpr = E->getSubExpr(); 1995a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 1996a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (SubExpr->getType()->isRealFloatingType()) { 1997f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexFloat(); 1998f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat &Imag = Result.FloatImag; 1999f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (!EvaluateFloat(SubExpr, Imag, Info)) 2000f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 20011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2002f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatReal = APFloat(Imag.getSemantics()); 2003f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2004a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 20051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump assert(SubExpr->getType()->isIntegerType() && 2006a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar "Unexpected imaginary literal."); 2007a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 2008f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexInt(); 2009f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt &Imag = Result.IntImag; 2010f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (!EvaluateInteger(SubExpr, Imag, Info)) 2011f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 20121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2013f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntReal = APSInt(Imag.getBitWidth(), !Imag.isSigned()); 2014f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2015a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 20169ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 20179ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2018f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool VisitCastExpr(CastExpr *E) { 2019ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson Expr* SubExpr = E->getSubExpr(); 2020183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall QualType EltType = E->getType()->getAs<ComplexType>()->getElementType(); 2021a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SubType = SubExpr->getType(); 2022ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 2023a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (SubType->isRealFloatingType()) { 2024f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APFloat &Real = Result.FloatReal; 2025f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (!EvaluateFloat(SubExpr, Real, Info)) 2026f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 20271725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 20281725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (EltType->isRealFloatingType()) { 2029f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexFloat(); 2030f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Real = HandleFloatToFloatCast(EltType, SubType, Real, Info.Ctx); 2031f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatImag = APFloat(Real.getSemantics()); 2032f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 20331725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } else { 2034f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexInt(); 2035f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntReal = HandleFloatToIntCast(EltType, SubType, Real, Info.Ctx); 2036f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntImag = APSInt(Result.IntReal.getBitWidth(), 2037f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall !Result.IntReal.isSigned()); 2038f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 20391725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 2040a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else if (SubType->isIntegerType()) { 2041f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall APSInt &Real = Result.IntReal; 2042f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (!EvaluateInteger(SubExpr, Real, Info)) 2043f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 2044a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 20451725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (EltType->isRealFloatingType()) { 2046f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexFloat(); 2047f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatReal 2048f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall = HandleIntToFloatCast(EltType, SubType, Real, Info.Ctx); 2049f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatImag = APFloat(Result.FloatReal.getSemantics()); 2050f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 20511725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } else { 2052f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexInt(); 2053f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Real = HandleIntToIntCast(EltType, SubType, Real, Info.Ctx); 2054f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntImag = APSInt(Real.getBitWidth(), !Real.isSigned()); 2055f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 20561725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 2057183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall } else if (const ComplexType *CT = SubType->getAs<ComplexType>()) { 2058f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (!Visit(SubExpr)) 2059f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 2060a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 2061a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar QualType SrcType = CT->getElementType(); 2062a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 2063f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (Result.isComplexFloat()) { 2064a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 2065f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexFloat(); 2066f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatReal = HandleFloatToFloatCast(EltType, SrcType, 2067f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatReal, 2068f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Info.Ctx); 2069f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatImag = HandleFloatToFloatCast(EltType, SrcType, 2070f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatImag, 2071f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Info.Ctx); 2072f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2073a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 2074f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexInt(); 2075f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntReal = HandleFloatToIntCast(EltType, SrcType, 2076f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatReal, 2077f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Info.Ctx); 2078f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntImag = HandleFloatToIntCast(EltType, SrcType, 2079f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatImag, 2080f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Info.Ctx); 2081f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2082a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 2083a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 2084f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall assert(Result.isComplexInt() && "Invalid evaluate result."); 2085a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar if (EltType->isRealFloatingType()) { 2086f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexFloat(); 2087f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatReal = HandleIntToFloatCast(EltType, SrcType, 2088f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntReal, 2089f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Info.Ctx); 2090f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.FloatImag = HandleIntToFloatCast(EltType, SrcType, 2091f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntImag, 2092f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Info.Ctx); 2093f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2094a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } else { 2095f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexInt(); 2096f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntReal = HandleIntToIntCast(EltType, SrcType, 2097f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntReal, 2098f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Info.Ctx); 2099f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntImag = HandleIntToIntCast(EltType, SrcType, 2100f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.IntImag, 2101f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Info.Ctx); 2102f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2103a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 2104a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar } 2105ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 2106ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 2107ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson // FIXME: Handle more casts. 2108f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 2109ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 21101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2111f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool VisitBinaryOperator(const BinaryOperator *E); 2112f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool VisitChooseExpr(const ChooseExpr *E) 2113ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 2114f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool VisitUnaryExtension(const UnaryOperator *E) 2115ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 2116ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME Missing: unary +/-/~, binary div, ImplicitValueInitExpr, 21172217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // conditional ?:, comma 21189ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson}; 21199ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} // end anonymous namespace 21209ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2121f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallstatic bool EvaluateComplex(const Expr *E, ComplexValue &Result, 2122f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall EvalInfo &Info) { 21237db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall assert(E->getType()->isAnyComplexType()); 2124f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return ComplexExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 21259ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} 21269ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2127f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallbool ComplexExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 2128f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (!Visit(E->getLHS())) 2129f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 21301eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2131f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue RHS; 2132a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 2133f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 2134a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 21353f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar assert(Result.isComplexFloat() == RHS.isComplexFloat() && 21363f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar "Invalid operands to binary operator."); 2137ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson switch (E->getOpcode()) { 2138f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall default: return false; 2139ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Add: 2140a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 2141a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().add(RHS.getComplexFloatReal(), 2142a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2143a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().add(RHS.getComplexFloatImag(), 2144a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2145a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 2146a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() += RHS.getComplexIntReal(); 2147a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() += RHS.getComplexIntImag(); 2148a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 21493f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 2150ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson case BinaryOperator::Sub: 2151a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 2152a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().subtract(RHS.getComplexFloatReal(), 2153a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2154a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().subtract(RHS.getComplexFloatImag(), 2155a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2156a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 2157a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() -= RHS.getComplexIntReal(); 2158a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() -= RHS.getComplexIntImag(); 2159a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 21603f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 21613f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar case BinaryOperator::Mul: 21623f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar if (Result.isComplexFloat()) { 2163f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 21643f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_r = LHS.getComplexFloatReal(); 21653f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_i = LHS.getComplexFloatImag(); 21663f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_r = RHS.getComplexFloatReal(); 21673f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_i = RHS.getComplexFloatImag(); 21681eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 21693f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat Tmp = LHS_r; 21703f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 21713f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal() = Tmp; 21723f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 21733f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 21743f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal().subtract(Tmp, APFloat::rmNearestTiesToEven); 21753f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 21763f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_r; 21773f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 21783f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag() = Tmp; 21793f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 21803f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 21813f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag().add(Tmp, APFloat::rmNearestTiesToEven); 21823f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } else { 2183f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 21841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntReal() = 21853f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntReal() - 21863f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntImag()); 21871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntImag() = 21883f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntImag() + 21893f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntReal()); 21903f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } 21913f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 2192ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 2193ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 2194f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2195ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson} 2196ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 21979ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 21986ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner// Top level Expr::Evaluate method. 2199f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 2200f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 220142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// Evaluate - Return true if this is a constant which we can fold using 220242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// any crazy technique (that has nothing to do with language standards) that 220342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// we want to. If this function returns true, it returns the folded constant 220442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// in Result. 220542c8f87eb60958170c46767273bf93e6c96125bfJohn McCallbool Expr::Evaluate(EvalResult &Result, ASTContext &Ctx) const { 220642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall const Expr *E = this; 220742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall EvalInfo Info(Ctx, Result); 2208efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (E->getType()->isVectorType()) { 2209efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateVector(E, Info.EvalResult.Val, Info)) 221059b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 2211efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isIntegerType()) { 2212efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!IntExprEvaluator(Info, Info.EvalResult.Val).Visit(const_cast<Expr*>(E))) 22136dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 22140f2b692bb10be35fdc60d0a72a847bdd73124670John McCall if (Result.Val.isLValue() && !IsGlobalLValue(Result.Val.getLValueBase())) 22150f2b692bb10be35fdc60d0a72a847bdd73124670John McCall return false; 2216efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->hasPointerRepresentation()) { 2217efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 2218efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(E, LV, Info)) 22196dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 2220e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (!IsGlobalLValue(LV.Base)) 222142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 2222efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Info.EvalResult.Val); 2223efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isRealFloatingType()) { 2224efdb83e26f9a1fd2566afe54461216cd84814d42John McCall llvm::APFloat F(0.0); 2225efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateFloat(E, F, Info)) 22266dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 22271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2228efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Info.EvalResult.Val = APValue(F); 2229efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isAnyComplexType()) { 2230efdb83e26f9a1fd2566afe54461216cd84814d42John McCall ComplexValue C; 2231efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateComplex(E, C, Info)) 2232660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 2233efdb83e26f9a1fd2566afe54461216cd84814d42John McCall C.moveInto(Info.EvalResult.Val); 2234660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else 2235660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 2236660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 2237660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return true; 2238660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump} 2239660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 2240cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCallbool Expr::EvaluateAsBooleanCondition(bool &Result, ASTContext &Ctx) const { 2241cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalResult Scratch; 2242cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalInfo Info(Ctx, Scratch); 2243cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall 2244cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall return HandleConversionToBool(this, Result, Info); 2245cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall} 2246cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall 22471b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlssonbool Expr::EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const { 22481b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson EvalInfo Info(Ctx, Result); 22491b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 2250efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 225142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (EvaluateLValue(this, LV, Info) && 225242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall !Result.HasSideEffects && 2253e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara IsGlobalLValue(LV.Base)) { 2254e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara LV.moveInto(Result.Val); 2255e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return true; 2256e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara } 2257e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return false; 2258e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara} 2259e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2260e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnarabool Expr::EvaluateAsAnyLValue(EvalResult &Result, ASTContext &Ctx) const { 2261e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara EvalInfo Info(Ctx, Result); 2262e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2263e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara LValue LV; 2264e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (EvaluateLValue(this, LV, Info)) { 2265efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result.Val); 2266efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 2267efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 2268efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 2269b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman} 2270b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 22716ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// isEvaluatable - Call Evaluate to see if this expression can be constant 227245b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner/// folded, but discard the result. 227345b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattnerbool Expr::isEvaluatable(ASTContext &Ctx) const { 22744fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson EvalResult Result; 22754fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects; 227645b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner} 227751fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 2278393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanianbool Expr::HasSideEffects(ASTContext &Ctx) const { 2279393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian Expr::EvalResult Result; 2280393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian EvalInfo Info(Ctx, Result); 2281393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return HasSideEffect(Info).Visit(const_cast<Expr*>(this)); 2282393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian} 2283393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian 228451fe996231b1d7199f76e4005ff4c943d5deeecdAnders CarlssonAPSInt Expr::EvaluateAsInt(ASTContext &Ctx) const { 22851c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 22861c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson bool Result = Evaluate(EvalResult, Ctx); 2287f185319f25efd6094870f287030270fad26085baDaniel Dunbar Result = Result; 228851fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson assert(Result && "Could not evaluate expression"); 22891c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(EvalResult.Val.isInt() && "Expression did not evaluate to integer"); 229051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 22911c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson return EvalResult.Val.getInt(); 229251fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson} 2293d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2294e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara bool Expr::EvalResult::isGlobalLValue() const { 2295e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara assert(Val.isLValue()); 2296e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return IsGlobalLValue(Val.getLValueBase()); 2297e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara } 2298e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2299e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2300d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// isIntegerConstantExpr - this recursive routine will test if an expression is 2301d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// an integer constant expression. 2302d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2303d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Pass up a reason why! Invalid operation in i-c-e, division by zero, 2304d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// comma, etc 2305d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// 2306d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Handle offsetof. Two things to do: Handle GCC's __builtin_offsetof 2307d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// to support gcc 4.0+ and handle the idiom GCC recognizes with a null pointer 2308d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// cast+dereference. 2309d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2310d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// CheckICE - This function does the fundamental ICE checking: the returned 2311d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// ICEDiag contains a Val of 0, 1, or 2, and a possibly null SourceLocation. 2312d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Note that to reduce code duplication, this helper does no evaluation 2313d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// itself; the caller checks whether the expression is evaluatable, and 2314d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// in the rare cases where CheckICE actually cares about the evaluated 2315d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// value, it calls into Evalute. 2316d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 2317d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Meanings of Val: 2318d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 0: This expression is an ICE if it can be evaluated by Evaluate. 2319d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 1: This expression is not an ICE, but if it isn't evaluated, it's 2320d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// a legal subexpression for an ICE. This return value is used to handle 2321d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// the comma operator in C99 mode. 2322d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 2: This expression is not an ICE, and is not a legal subexpression for one. 2323d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 23243c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 23253c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 2326d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstruct ICEDiag { 2327d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall unsigned Val; 2328d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall SourceLocation Loc; 2329d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2330d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall public: 2331d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag(unsigned v, SourceLocation l) : Val(v), Loc(l) {} 2332d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag() : Val(0) {} 2333d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall}; 2334d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 23353c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 23363c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 23373c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmanstatic ICEDiag NoDiag() { return ICEDiag(); } 2338d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2339d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckEvalInICE(const Expr* E, ASTContext &Ctx) { 2340d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 2341d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!E->Evaluate(EVResult, Ctx) || EVResult.HasSideEffects || 2342d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 2343d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2344d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2345d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2346d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 2347d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2348d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckICE(const Expr* E, ASTContext &Ctx) { 2349d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(!E->isValueDependent() && "Should not see value dependent exprs!"); 23502ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!E->getType()->isIntegralOrEnumerationType()) { 2351d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2352d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2353d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2354d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (E->getStmtClass()) { 2355d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define STMT(Node, Base) case Expr::Node##Class: 2356d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define EXPR(Node, Base) 2357d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#include "clang/AST/StmtNodes.inc" 2358d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::PredefinedExprClass: 2359d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::FloatingLiteralClass: 2360d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImaginaryLiteralClass: 2361d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StringLiteralClass: 2362d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ArraySubscriptExprClass: 2363d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::MemberExprClass: 2364d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundAssignOperatorClass: 2365d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundLiteralExprClass: 2366d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ExtVectorElementExprClass: 2367d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::InitListExprClass: 2368d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DesignatedInitExprClass: 2369d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitValueInitExprClass: 2370d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenListExprClass: 2371d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::VAArgExprClass: 2372d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::AddrLabelExprClass: 2373d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StmtExprClass: 2374d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXMemberCallExprClass: 2375d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDynamicCastExprClass: 2376d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTypeidExprClass: 2377d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNullPtrLiteralExprClass: 2378d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThisExprClass: 2379d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThrowExprClass: 2380d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNewExprClass: 2381d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDeleteExprClass: 2382d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXPseudoDestructorExprClass: 2383d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedLookupExprClass: 2384d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DependentScopeDeclRefExprClass: 2385d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXConstructExprClass: 2386d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBindTemporaryExprClass: 2387d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBindReferenceExprClass: 2388d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXExprWithTemporariesClass: 2389d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTemporaryObjectExprClass: 2390d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXUnresolvedConstructExprClass: 2391d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDependentScopeMemberExprClass: 2392d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedMemberExprClass: 2393d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCStringLiteralClass: 2394d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCEncodeExprClass: 2395d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCMessageExprClass: 2396d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCSelectorExprClass: 2397d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCProtocolExprClass: 2398d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIvarRefExprClass: 2399d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCPropertyRefExprClass: 2400d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCImplicitSetterGetterRefExprClass: 2401d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCSuperExprClass: 2402d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIsaExprClass: 2403d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ShuffleVectorExprClass: 2404d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockExprClass: 2405d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockDeclRefExprClass: 2406d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::NoStmtClass: 2407d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2408d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2409d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::GNUNullExprClass: 2410d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // GCC considers the GNU __null value to be an integral constant expression. 2411d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2412d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2413d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenExprClass: 2414d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ParenExpr>(E)->getSubExpr(), Ctx); 2415d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::IntegerLiteralClass: 2416d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CharacterLiteralClass: 2417d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBoolLiteralExprClass: 2418ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor case Expr::CXXScalarValueInitExprClass: 2419d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::TypesCompatibleExprClass: 2420d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryTypeTraitExprClass: 2421d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2422d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CallExprClass: 2423d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXOperatorCallExprClass: { 2424d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const CallExpr *CE = cast<CallExpr>(E); 2425d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CE->isBuiltinCall(Ctx)) 2426d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 2427d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2428d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2429d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DeclRefExprClass: 2430d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<EnumConstantDecl>(cast<DeclRefExpr>(E)->getDecl())) 2431d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2432d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Ctx.getLangOptions().CPlusPlus && 2433d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall E->getType().getCVRQualifiers() == Qualifiers::Const) { 2434d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl(); 2435d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2436d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Parameter variables are never constants. Without this check, 2437d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // getAnyInitializer() can find a default argument, which leads 2438d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to chaos. 2439d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<ParmVarDecl>(D)) 2440d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2441d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2442d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C++ 7.1.5.1p2 2443d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // A variable of non-volatile const-qualified integral or enumeration 2444d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // type initialized by an ICE can be used in ICEs. 2445d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const VarDecl *Dcl = dyn_cast<VarDecl>(D)) { 2446d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Qualifiers Quals = Ctx.getCanonicalType(Dcl->getType()).getQualifiers(); 2447d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Quals.hasVolatile() || !Quals.hasConst()) 2448d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2449d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2450d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Look for a declaration of this variable that has an initializer. 2451d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const VarDecl *ID = 0; 2452d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const Expr *Init = Dcl->getAnyInitializer(ID); 2453d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Init) { 2454d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (ID->isInitKnownICE()) { 2455d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // We have already checked whether this subexpression is an 2456d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // integral constant expression. 2457d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (ID->isInitICE()) 2458d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2459d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall else 2460d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2461d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2462d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2463d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // It's an ICE whether or not the definition we found is 2464d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // out-of-line. See DR 721 and the discussion in Clang PR 2465d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // 6206 for details. 2466d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2467d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Dcl->isCheckingICE()) { 2468d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2469d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2470d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2471d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Dcl->setCheckingICE(); 2472d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag Result = CheckICE(Init, Ctx); 2473d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Cache the result of the ICE test. 2474d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Dcl->setInitKnownICE(Result.Val == 0); 2475d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return Result; 2476d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2477d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2478d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2479d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2480d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryOperatorClass: { 2481d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const UnaryOperator *Exp = cast<UnaryOperator>(E); 2482d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 2483d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::PostInc: 2484d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::PostDec: 2485d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::PreInc: 2486d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::PreDec: 2487d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::AddrOf: 2488d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::Deref: 2489d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2490d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::Extension: 2491d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::LNot: 2492d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::Plus: 2493d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::Minus: 2494d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::Not: 2495d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::Real: 2496d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::Imag: 2497d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(Exp->getSubExpr(), Ctx); 2498d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case UnaryOperator::OffsetOf: 2499d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall break; 2500d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2501d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2502d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // OffsetOf falls through here. 2503d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2504d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::OffsetOfExprClass: { 2505d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that per C99, offsetof must be an ICE. And AFAIK, using 2506d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Evaluate matches the proposed gcc behavior for cases like 2507d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // "offsetof(struct s{int x[4];}, x[!.0])". This doesn't affect 2508d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // compliance: we should warn earlier for offsetof expressions with 2509d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // array subscripts that aren't ICEs, and if the array subscripts 2510d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // are ICEs, the value of the offsetof must be an integer constant. 2511d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 2512d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2513d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::SizeOfAlignOfExprClass: { 2514d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const SizeOfAlignOfExpr *Exp = cast<SizeOfAlignOfExpr>(E); 2515d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Exp->isSizeOf() && Exp->getTypeOfArgument()->isVariableArrayType()) 2516d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2517d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2518d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2519d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BinaryOperatorClass: { 2520d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const BinaryOperator *Exp = cast<BinaryOperator>(E); 2521d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 2522d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::PtrMemD: 2523d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::PtrMemI: 2524d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::Assign: 2525d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::MulAssign: 2526d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::DivAssign: 2527d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::RemAssign: 2528d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::AddAssign: 2529d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::SubAssign: 2530d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::ShlAssign: 2531d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::ShrAssign: 2532d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::AndAssign: 2533d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::XorAssign: 2534d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::OrAssign: 2535d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2536d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2537d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::Mul: 2538d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::Div: 2539d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::Rem: 2540d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::Add: 2541d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::Sub: 2542d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::Shl: 2543d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::Shr: 2544d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::LT: 2545d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::GT: 2546d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::LE: 2547d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::GE: 2548d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::EQ: 2549d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::NE: 2550d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::And: 2551d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::Xor: 2552d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::Or: 2553d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::Comma: { 2554d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 2555d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 2556d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Exp->getOpcode() == BinaryOperator::Div || 2557d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Exp->getOpcode() == BinaryOperator::Rem) { 2558d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Evaluate gives an error for undefined Div/Rem, so make sure 2559d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // we don't evaluate one. 2560d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val != 2 && RHSResult.Val != 2) { 2561d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm::APSInt REval = Exp->getRHS()->EvaluateAsInt(Ctx); 2562d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval == 0) 2563d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2564d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval.isSigned() && REval.isAllOnesValue()) { 2565d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm::APSInt LEval = Exp->getLHS()->EvaluateAsInt(Ctx); 2566d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LEval.isMinSignedValue()) 2567d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2568d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2569d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2570d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2571d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Exp->getOpcode() == BinaryOperator::Comma) { 2572d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Ctx.getLangOptions().C99) { 2573d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C99 6.6p3 introduces a strange edge case: comma can be in an ICE 2574d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // if it isn't evaluated. 2575d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 0) 2576d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2577d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } else { 2578d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // In both C89 and C++, commas in ICEs are illegal. 2579d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2580d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2581d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2582d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 2583d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 2584d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 2585d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2586d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::LAnd: 2587d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case BinaryOperator::LOr: { 2588d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 2589d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 2590d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 1) { 2591d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the RHS has a comma "side-effect"; we need 2592d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to actually check the condition to see whether the side 2593d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // with the comma is evaluated. 2594d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if ((Exp->getOpcode() == BinaryOperator::LAnd) != 2595d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall (Exp->getLHS()->EvaluateAsInt(Ctx) == 0)) 2596d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 2597d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2598d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2599d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2600d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 2601d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 2602d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 2603d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2604d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2605d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2606d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitCastExprClass: 2607d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CStyleCastExprClass: 2608d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXFunctionalCastExprClass: 2609d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXStaticCastExprClass: 2610d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXReinterpretCastExprClass: 2611d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXConstCastExprClass: { 2612d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const Expr *SubExpr = cast<CastExpr>(E)->getSubExpr(); 26132ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (SubExpr->getType()->isIntegralOrEnumerationType()) 2614d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(SubExpr, Ctx); 2615d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<FloatingLiteral>(SubExpr->IgnoreParens())) 2616d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2617d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2618d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2619d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ConditionalOperatorClass: { 2620d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const ConditionalOperator *Exp = cast<ConditionalOperator>(E); 2621d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // If the condition (ignoring parens) is a __builtin_constant_p call, 2622d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // then only the true side is actually considered in an integer constant 2623d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // expression, and it is fully evaluated. This is an important GNU 2624d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // extension. See GCC PR38377 for discussion. 2625d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const CallExpr *CallCE 2626d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall = dyn_cast<CallExpr>(Exp->getCond()->IgnoreParenCasts())) 2627d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CallCE->isBuiltinCall(Ctx) == Builtin::BI__builtin_constant_p) { 2628d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 2629d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!E->Evaluate(EVResult, Ctx) || EVResult.HasSideEffects || 2630d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 2631d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2632d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2633d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2634d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2635d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag CondResult = CheckICE(Exp->getCond(), Ctx); 2636d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag TrueResult = CheckICE(Exp->getTrueExpr(), Ctx); 2637d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag FalseResult = CheckICE(Exp->getFalseExpr(), Ctx); 2638d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 2) 2639d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 2640d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 2) 2641d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 2642d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (FalseResult.Val == 2) 2643d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 2644d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 1) 2645d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 2646d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 0 && FalseResult.Val == 0) 2647d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2648d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the diagnostics depend on which side is evaluated 2649d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that if we get here, CondResult is 0, and at least one of 2650d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // TrueResult and FalseResult is non-zero. 2651d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Exp->getCond()->EvaluateAsInt(Ctx) == 0) { 2652d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 2653d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2654d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 2655d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2656d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDefaultArgExprClass: 2657d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<CXXDefaultArgExpr>(E)->getExpr(), Ctx); 2658d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ChooseExprClass: { 2659d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ChooseExpr>(E)->getChosenSubExpr(Ctx), Ctx); 2660d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2661d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2662d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2663d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Silence a GCC warning 2664d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2665d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 2666d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2667d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallbool Expr::isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 2668d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall SourceLocation *Loc, bool isEvaluated) const { 2669d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag d = CheckICE(this, Ctx); 2670d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (d.Val != 0) { 2671d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Loc) *Loc = d.Loc; 2672d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return false; 2673d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2674d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall EvalResult EvalResult; 2675d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!Evaluate(EvalResult, Ctx)) 2676d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm_unreachable("ICE cannot be evaluated!"); 2677d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(!EvalResult.HasSideEffects && "ICE with side effects!"); 2678d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(EvalResult.Val.isInt() && "ICE that isn't integer!"); 2679d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Result = EvalResult.Val.getInt(); 2680d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return true; 2681d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 2682