ExprConstant.cpp revision 6ad6f2848d7652ab2991286eb48be440d3493b28
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 3402de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_NoOp: 34126bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson return Visit(E->getSubExpr()); 34226bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 34326bc220377705292a0519a71d3ea3aef68fcfec6Anders Carlsson } 344ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: __real__, __imag__ 3454efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman}; 3464efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} // end anonymous namespace 3474efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 348efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluateLValue(const Expr* E, LValue& Result, EvalInfo &Info) { 349efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return LValueExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 3504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 3514efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 352efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool LValueExprEvaluator::VisitDeclRefExpr(DeclRefExpr *E) { 35350c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (isa<FunctionDecl>(E->getDecl())) { 354efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 35550c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } else if (VarDecl* VD = dyn_cast<VarDecl>(E->getDecl())) { 35650c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman if (!VD->getType()->isReferenceType()) 357efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 358761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth // Reference parameters can refer to anything even if they have an 359761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth // "initializer" in the form of a default argument. 360761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth if (isa<ParmVarDecl>(VD)) 361761c94e3bffef0fcb8b4bbf202fd5ee73db134f3Chandler Carruth return false; 362d933a0198f3ccce9c73bf2951625315b911d37bfEli Friedman // FIXME: Check whether VD might be overridden! 36331310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl if (const Expr *Init = VD->getAnyInitializer()) 364cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor return Visit(const_cast<Expr *>(Init)); 36550c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman } 36650c39ea4858265f3f5f42a0c624557ce2281936bEli Friedman 367efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 36835873c49adad211ff466e34342a52665742794f5Anders Carlsson} 36935873c49adad211ff466e34342a52665742794f5Anders Carlsson 370efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool LValueExprEvaluator::VisitCompoundLiteralExpr(CompoundLiteralExpr *E) { 371efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 3724efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 3734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 374efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool LValueExprEvaluator::VisitMemberExpr(MemberExpr *E) { 3754efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman QualType Ty; 3764efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (E->isArrow()) { 377efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(E->getBase(), Result, Info)) 378efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 3796217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek Ty = E->getBase()->getType()->getAs<PointerType>()->getPointeeType(); 3804efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } else { 381efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!Visit(E->getBase())) 382efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 3834efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Ty = E->getBase()->getType(); 3844efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 3854efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 3866217b80b7a1379b74cced1c076338262c3c980b3Ted Kremenek RecordDecl *RD = Ty->getAs<RecordType>()->getDecl(); 3874efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 38886f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 38986f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor FieldDecl *FD = dyn_cast<FieldDecl>(E->getMemberDecl()); 39086f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (!FD) // FIXME: deal with other kinds of member expressions 391efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 3922be586108bb401019647791feca19ea03fd477ceEli Friedman 3932be586108bb401019647791feca19ea03fd477ceEli Friedman if (FD->getType()->isReferenceType()) 394efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 3952be586108bb401019647791feca19ea03fd477ceEli Friedman 3964efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman // FIXME: This is linear time. 39744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor unsigned i = 0; 39817945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis for (RecordDecl::field_iterator Field = RD->field_begin(), 39917945a0f64fe03ff6ec0c2146005a87636e3ac12Argyrios Kyrtzidis FieldEnd = RD->field_end(); 40044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; (void)++Field, ++i) { 40144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (*Field == FD) 4024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman break; 4034efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 4044efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 405efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset += CharUnits::fromQuantity(RL.getFieldOffset(i) / 8); 406efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 4074efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 4084efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 409efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool LValueExprEvaluator::VisitArraySubscriptExpr(ArraySubscriptExpr *E) { 4103068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getBase(), Result, Info)) 411efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 4121eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 4133068d117951a8df54bae9db039b56201ab10962bAnders Carlsson APSInt Index; 4143068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluateInteger(E->getIdx(), Index, Info)) 415efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 4163068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 417199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck CharUnits ElementSize = Info.Ctx.getTypeSizeInChars(E->getType()); 418efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset += Index.getSExtValue() * ElementSize; 419efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 4203068d117951a8df54bae9db039b56201ab10962bAnders Carlsson} 4214efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 422efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool LValueExprEvaluator::VisitUnaryDeref(UnaryOperator *E) { 423efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluatePointer(E->getSubExpr(), Result, Info); 424e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman} 425e8761c8fe2ee6b628104a0885f49fd3c21c08a4fEli Friedman 4264efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman//===----------------------------------------------------------------------===// 427f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Pointer Evaluation 428f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 429f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 430c754aa62643e66ab967ca32ae8b0b3fc419bba25Anders Carlssonnamespace { 431770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass PointerExprEvaluator 432efdb83e26f9a1fd2566afe54461216cd84814d42John McCall : public StmtVisitor<PointerExprEvaluator, bool> { 43387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 434efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue &Result; 435efdb83e26f9a1fd2566afe54461216cd84814d42John McCall 436efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool Success(Expr *E) { 437efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = E; 438efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::Zero(); 439efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 440efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 4412bad1687fe6f00e10767a691a33b070b151902b6Anders Carlssonpublic: 4421eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 443efdb83e26f9a1fd2566afe54461216cd84814d42John McCall PointerExprEvaluator(EvalInfo &info, LValue &Result) 444efdb83e26f9a1fd2566afe54461216cd84814d42John McCall : Info(info), Result(Result) {} 445f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 446efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitStmt(Stmt *S) { 447efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 4482bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 4492bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 450efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 4512bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 452efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitBinaryOperator(const BinaryOperator *E); 453efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitCastExpr(CastExpr* E); 454efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitUnaryExtension(const UnaryOperator *E) 4552217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman { return Visit(E->getSubExpr()); } 456efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitUnaryAddrOf(const UnaryOperator *E); 457efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitObjCStringLiteral(ObjCStringLiteral *E) 458efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success(E); } 459efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitAddrLabelExpr(AddrLabelExpr *E) 460efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success(E); } 461efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitCallExpr(CallExpr *E); 462efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitBlockExpr(BlockExpr *E) { 463b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump if (!E->hasBlockDeclRefExprs()) 464efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 465efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 466b83d287bc7f47d36fb0751a481e2ef9308b37252Mike Stump } 467efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitImplicitValueInitExpr(ImplicitValueInitExpr *E) 468efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success((Expr*)0); } 469efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitConditionalOperator(ConditionalOperator *E); 470efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitChooseExpr(ChooseExpr *E) 4716e8ed16ffef02b82995a90bdcf10ffff7d63839aSebastian Redl { return Visit(E->getChosenSubExpr(Info.Ctx)); } 472efdb83e26f9a1fd2566afe54461216cd84814d42John McCall bool VisitCXXNullPtrLiteralExpr(CXXNullPtrLiteralExpr *E) 473efdb83e26f9a1fd2566afe54461216cd84814d42John McCall { return Success((Expr*)0); } 474ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman // FIXME: Missing: @protocol, @selector 4752bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson}; 476f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 4772bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 478efdb83e26f9a1fd2566afe54461216cd84814d42John McCallstatic bool EvaluatePointer(const Expr* E, LValue& Result, EvalInfo &Info) { 4797db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall assert(E->getType()->hasPointerRepresentation()); 480efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return PointerExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 481f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 482650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 483efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 4842de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() != BO_Add && 4852de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall E->getOpcode() != BO_Sub) 486efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 4871eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 488650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *PExp = E->getLHS(); 489650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson const Expr *IExp = E->getRHS(); 490650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson if (IExp->getType()->isPointerType()) 491f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner std::swap(PExp, IExp); 4921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 493efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(PExp, Result, Info)) 494efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 4951eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 496efdb83e26f9a1fd2566afe54461216cd84814d42John McCall llvm::APSInt Offset; 497efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateInteger(IExp, Offset, Info)) 498efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 499efdb83e26f9a1fd2566afe54461216cd84814d42John McCall int64_t AdditionalOffset 500efdb83e26f9a1fd2566afe54461216cd84814d42John McCall = Offset.isSigned() ? Offset.getSExtValue() 501efdb83e26f9a1fd2566afe54461216cd84814d42John McCall : static_cast<int64_t>(Offset.getZExtValue()); 502650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 503e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar // Compute the new offset in the appropriate width. 504e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar 505e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar QualType PointeeType = 506e0cdb4edd8f265d0fd22d178d03c597dd201cda2Daniel Dunbar PExp->getType()->getAs<PointerType>()->getPointeeType(); 507efdb83e26f9a1fd2566afe54461216cd84814d42John McCall CharUnits SizeOfPointee; 5081eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 5094d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson // Explicitly handle GNU void* and function pointer arithmetic extensions. 5104d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson if (PointeeType->isVoidType() || PointeeType->isFunctionType()) 511efdb83e26f9a1fd2566afe54461216cd84814d42John McCall SizeOfPointee = CharUnits::One(); 5124d4c50dd8b4db191c38782414665fb7608315a36Anders Carlsson else 513efdb83e26f9a1fd2566afe54461216cd84814d42John McCall SizeOfPointee = Info.Ctx.getTypeSizeInChars(PointeeType); 5144efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 5152de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add) 516efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset += AdditionalOffset * SizeOfPointee; 517650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson else 518efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset -= AdditionalOffset * SizeOfPointee; 5194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 520efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 521650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson} 5224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 523efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitUnaryAddrOf(const UnaryOperator *E) { 524efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluateLValue(E->getSubExpr(), Result, Info); 5254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 5261eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 527650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 528efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitCastExpr(CastExpr* E) { 52909a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman Expr* SubExpr = E->getSubExpr(); 530650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 53109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman switch (E->getCastKind()) { 53209a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman default: 53309a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 53409a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 5352de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_NoOp: 5362de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_BitCast: 5372de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_LValueBitCast: 5382de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_AnyPointerToObjCPointerCast: 5392de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_AnyPointerToBlockPointerCast: 54009a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman return Visit(SubExpr); 54109a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman 5425c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson case CK_DerivedToBase: 5435c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson case CK_UncheckedDerivedToBase: { 5445c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson LValue BaseLV; 5455c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson if (!EvaluatePointer(E->getSubExpr(), BaseLV, Info)) 5465c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return false; 5475c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5485c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // Now figure out the necessary offset to add to the baseLV to get from 5495c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // the derived class to the base class. 5505c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson uint64_t Offset = 0; 5515c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5525c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson QualType Ty = E->getSubExpr()->getType(); 5535c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXRecordDecl *DerivedDecl = 5545c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson Ty->getAs<PointerType>()->getPointeeType()->getAsCXXRecordDecl(); 5555c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5565c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson for (CastExpr::path_const_iterator PathI = E->path_begin(), 5575c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson PathE = E->path_end(); PathI != PathE; ++PathI) { 5585c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXBaseSpecifier *Base = *PathI; 5595c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5605c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // FIXME: If the base is virtual, we'd need to determine the type of the 5615c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson // most derived class and we don't support that right now. 5625c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson if (Base->isVirtual()) 5635c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return false; 5645c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5655c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const CXXRecordDecl *BaseDecl = Base->getType()->getAsCXXRecordDecl(); 5665c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson const ASTRecordLayout &Layout = Info.Ctx.getASTRecordLayout(DerivedDecl); 5675c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 568a14f5979572aa25c03d24750ee4724d2031d4edeAnders Carlsson Offset += Layout.getBaseClassOffsetInBits(BaseDecl); 5695c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson DerivedDecl = BaseDecl; 5705c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson } 5715c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 5725c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson Result.Base = BaseLV.getLValueBase(); 5735c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson Result.Offset = BaseLV.getLValueOffset() + 5745c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson CharUnits::fromQuantity(Offset / Info.Ctx.getCharWidth()); 5755c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson return true; 5765c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson } 5775c5a764fcd256df6f6cfbce5cdd2a2dfb2c45e95Anders Carlsson 578404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall case CK_NullToPointer: { 579404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall Result.Base = 0; 580404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall Result.Offset = CharUnits::Zero(); 581404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall return true; 582404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall } 583404cd1669c3ba138a9ae0a619bd689cce5aae271John McCall 5842de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_IntegralToPointer: { 585efdb83e26f9a1fd2566afe54461216cd84814d42John McCall APValue Value; 586efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateIntegerOrLValue(SubExpr, Value, Info)) 58709a8a0e6ec1252cad52666e9dbb21002b9c80f38Eli Friedman break; 58869ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 589efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (Value.isInt()) { 590efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Value.getInt().extOrTrunc((unsigned)Info.Ctx.getTypeSize(E->getType())); 591efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = 0; 592efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = CharUnits::fromQuantity(Value.getInt().getZExtValue()); 593efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 594efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else { 595efdb83e26f9a1fd2566afe54461216cd84814d42John McCall // Cast is of an lvalue, no need to change value. 596efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Base = Value.getLValueBase(); 597efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Result.Offset = Value.getLValueOffset(); 598efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 599650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 600650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson } 6012de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_ArrayToPointerDecay: 6022de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case CK_FunctionToPointerDecay: 603efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return EvaluateLValue(SubExpr, Result, Info); 6044efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 6054efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 606efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6071eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump} 608650c92fdcc27a950a8a848ecab6a74e6f5e80788Anders Carlsson 609efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitCallExpr(CallExpr *E) { 6101eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump if (E->isBuiltinCall(Info.Ctx) == 6110d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Builtin::BI__builtin___CFStringMakeConstantString || 6120d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall E->isBuiltinCall(Info.Ctx) == 6130d13f6fdbdd6f06e2449b8834dda53334abd399aDavid Chisnall Builtin::BI__builtin___NSStringMakeConstantString) 614efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Success(E); 615efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6163941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman} 6173941b18b8e441c8c466efecd557de60b9a32d10bEli Friedman 618efdb83e26f9a1fd2566afe54461216cd84814d42John McCallbool PointerExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 6194efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 6204efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 621efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 6224efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 6234efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 624efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return Visit(EvalExpr); 6254efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 626f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 627f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 62859b5da6d853b4368b984700315adf7b37de05764Nate Begeman// Vector Evaluation 62959b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 63059b5da6d853b4368b984700315adf7b37de05764Nate Begeman 63159b5da6d853b4368b984700315adf7b37de05764Nate Begemannamespace { 632770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramer class VectorExprEvaluator 63359b5da6d853b4368b984700315adf7b37de05764Nate Begeman : public StmtVisitor<VectorExprEvaluator, APValue> { 63459b5da6d853b4368b984700315adf7b37de05764Nate Begeman EvalInfo &Info; 63591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue GetZeroVector(QualType VecType); 63659b5da6d853b4368b984700315adf7b37de05764Nate Begeman public: 6371eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 63859b5da6d853b4368b984700315adf7b37de05764Nate Begeman VectorExprEvaluator(EvalInfo &info) : Info(info) {} 6391eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 64059b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitStmt(Stmt *S) { 64159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(); 64259b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 6431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 64491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitParenExpr(ParenExpr *E) 64591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 64691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryExtension(const UnaryOperator *E) 64791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 64891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryPlus(const UnaryOperator *E) 64991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 65091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryReal(const UnaryOperator *E) 65191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return Visit(E->getSubExpr()); } 65291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) 65391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman { return GetZeroVector(E->getType()); } 65459b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCastExpr(const CastExpr* E); 65559b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitCompoundLiteralExpr(const CompoundLiteralExpr *E); 65659b5da6d853b4368b984700315adf7b37de05764Nate Begeman APValue VisitInitListExpr(const InitListExpr *E); 65791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitConditionalOperator(const ConditionalOperator *E); 658ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman APValue VisitChooseExpr(const ChooseExpr *E) 659ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 66091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue VisitUnaryImag(const UnaryOperator *E); 66191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // FIXME: Missing: unary -, unary ~, binary add/sub/mul/div, 6622217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // binary comparisons, binary and/or/xor, 66391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // shufflevector, ExtVectorElementExpr 66491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // (Note that these require implementing conversions 66591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman // between vector types.) 66659b5da6d853b4368b984700315adf7b37de05764Nate Begeman }; 66759b5da6d853b4368b984700315adf7b37de05764Nate Begeman} // end anonymous namespace 66859b5da6d853b4368b984700315adf7b37de05764Nate Begeman 66959b5da6d853b4368b984700315adf7b37de05764Nate Begemanstatic bool EvaluateVector(const Expr* E, APValue& Result, EvalInfo &Info) { 67059b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (!E->getType()->isVectorType()) 67159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 67259b5da6d853b4368b984700315adf7b37de05764Nate Begeman Result = VectorExprEvaluator(Info).Visit(const_cast<Expr*>(E)); 67359b5da6d853b4368b984700315adf7b37de05764Nate Begeman return !Result.isUninit(); 67459b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 67559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 67659b5da6d853b4368b984700315adf7b37de05764Nate BegemanAPValue VectorExprEvaluator::VisitCastExpr(const CastExpr* E) { 677183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VTy = E->getType()->getAs<VectorType>(); 678c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman QualType EltTy = VTy->getElementType(); 679c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned NElts = VTy->getNumElements(); 680c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman unsigned EltWidth = Info.Ctx.getTypeSize(EltTy); 6811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 68259b5da6d853b4368b984700315adf7b37de05764Nate Begeman const Expr* SE = E->getSubExpr(); 683e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman QualType SETy = SE->getType(); 684e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APValue Result = APValue(); 68559b5da6d853b4368b984700315adf7b37de05764Nate Begeman 686e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman // Check for vector->vector bitcast and scalar->vector splat. 687e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman if (SETy->isVectorType()) { 68859b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(SE)); 689e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isIntegerType()) { 690e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APSInt IntResult; 691d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateInteger(SE, IntResult, Info)) 692d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 693d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(IntResult); 694e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } else if (SETy->isRealFloatingType()) { 695e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman APFloat F(0.0); 696d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar if (!EvaluateFloat(SE, F, Info)) 697d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar return APValue(); 698d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar Result = APValue(F); 699d906dc7605b2d6352e16c27a5d3fb5f1a1b44ac8Daniel Dunbar } else 700c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 70159b5da6d853b4368b984700315adf7b37de05764Nate Begeman 702c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to ExtVector, convert the scalar to the element type 703c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // and splat it to all elements. 704c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (E->getType()->isExtVectorType()) { 705c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType() && Result.isInt()) 706c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToIntCast(EltTy, SETy, Result.getInt(), 707c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 708c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isIntegerType()) 709c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToIntCast(EltTy, SETy, Result.getFloat(), 710c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 711c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType() && Result.isInt()) 712c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleIntToFloatCast(EltTy, SETy, Result.getInt(), 713c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 714c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 715c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Result = APValue(HandleFloatToFloatCast(EltTy, SETy, Result.getFloat(), 716c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Info.Ctx)); 717c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 718c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 719c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 720c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // Splat and create vector APValue. 721c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts(NElts, Result); 722c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 723e8c9e9218f215ec6089f12b076c7b9d310fd5194Nate Begeman } 724c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 725c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // For casts of a scalar to regular gcc-style vector type, bitcast the scalar 726c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // to the vector. To construct the APValue vector initializer, bitcast the 727c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // initializing value to an APInt, and shift out the bits pertaining to each 728c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman // element. 729c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman APSInt Init; 730c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init = Result.isInt() ? Result.getInt() : Result.getFloat().bitcastToAPInt(); 7311eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 732c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman llvm::SmallVector<APValue, 4> Elts; 733c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman for (unsigned i = 0; i != NElts; ++i) { 734c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman APSInt Tmp = Init; 735c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Tmp.extOrTrunc(EltWidth); 7361eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 737c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman if (EltTy->isIntegerType()) 738c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(Tmp)); 739c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else if (EltTy->isRealFloatingType()) 740c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Elts.push_back(APValue(APFloat(Tmp))); 741c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman else 742c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(); 743c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman 744c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman Init >>= EltWidth; 745c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman } 746c0b8b19bd8056d6b5d831623a0825cce150f4507Nate Begeman return APValue(&Elts[0], Elts.size()); 74759b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 74859b5da6d853b4368b984700315adf7b37de05764Nate Begeman 7491eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 75059b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitCompoundLiteralExpr(const CompoundLiteralExpr *E) { 75159b5da6d853b4368b984700315adf7b37de05764Nate Begeman return this->Visit(const_cast<Expr*>(E->getInitializer())); 75259b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 75359b5da6d853b4368b984700315adf7b37de05764Nate Begeman 7541eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 75559b5da6d853b4368b984700315adf7b37de05764Nate BegemanVectorExprEvaluator::VisitInitListExpr(const InitListExpr *E) { 756183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = E->getType()->getAs<VectorType>(); 75759b5da6d853b4368b984700315adf7b37de05764Nate Begeman unsigned NumInits = E->getNumInits(); 75891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman unsigned NumElements = VT->getNumElements(); 7591eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 76059b5da6d853b4368b984700315adf7b37de05764Nate Begeman QualType EltTy = VT->getElementType(); 76159b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::SmallVector<APValue, 4> Elements; 76259b5da6d853b4368b984700315adf7b37de05764Nate Begeman 763a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // If a vector is initialized with a single element, that value 764a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // becomes every element of the vector, not just the first. 765a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall // This is the behavior described in the IBM AltiVec documentation. 766a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (NumInits == 1) { 767a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall APValue InitValue; 76859b5da6d853b4368b984700315adf7b37de05764Nate Begeman if (EltTy->isIntegerType()) { 76959b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APSInt sInt(32); 770a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(0), sInt, Info)) 771a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 772a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(sInt); 77359b5da6d853b4368b984700315adf7b37de05764Nate Begeman } else { 77459b5da6d853b4368b984700315adf7b37de05764Nate Begeman llvm::APFloat f(0.0); 775a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(0), f, Info)) 776a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 777a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall InitValue = APValue(f); 778a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 779a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 780a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(InitValue); 781a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 782a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 783a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall for (unsigned i = 0; i < NumElements; i++) { 784a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (EltTy->isIntegerType()) { 785a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APSInt sInt(32); 786a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 787a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateInteger(E->getInit(i), sInt, Info)) 788a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 789a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 790a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall sInt = Info.Ctx.MakeIntValue(0, EltTy); 791a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 792a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(sInt)); 79391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } else { 794a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall llvm::APFloat f(0.0); 795a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (i < NumInits) { 796a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall if (!EvaluateFloat(E->getInit(i), f, Info)) 797a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall return APValue(); 798a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } else { 799a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall f = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy)); 800a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall } 801a7d6c221558fa8117aa1d1fd41cf0046c5c9fadeJohn McCall Elements.push_back(APValue(f)); 80291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman } 80359b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 80459b5da6d853b4368b984700315adf7b37de05764Nate Begeman } 80559b5da6d853b4368b984700315adf7b37de05764Nate Begeman return APValue(&Elements[0], Elements.size()); 80659b5da6d853b4368b984700315adf7b37de05764Nate Begeman} 80759b5da6d853b4368b984700315adf7b37de05764Nate Begeman 8081eb4433ac451dc16f4133a88af2d002ac26c58efMike StumpAPValue 80991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanVectorExprEvaluator::GetZeroVector(QualType T) { 810183700f494ec9b6701b6efe82bcb25f4c79ba561John McCall const VectorType *VT = T->getAs<VectorType>(); 81191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman QualType EltTy = VT->getElementType(); 81291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue ZeroElement; 81391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EltTy->isIntegerType()) 81491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = APValue(Info.Ctx.MakeIntValue(0, EltTy)); 81591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman else 81691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman ZeroElement = 81791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue(APFloat::getZero(Info.Ctx.getFloatTypeSemantics(EltTy))); 81891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 81991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman llvm::SmallVector<APValue, 4> Elements(VT->getNumElements(), ZeroElement); 82091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(&Elements[0], Elements.size()); 82191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 82291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 82391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 82491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman bool BoolResult; 82591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!HandleConversionToBool(E->getCond(), BoolResult, Info)) 82691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 82791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 82891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Expr* EvalExpr = BoolResult ? E->getTrueExpr() : E->getFalseExpr(); 82991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 83091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman APValue Result; 83191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (EvaluateVector(EvalExpr, Result, Info)) 83291110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return Result; 83391110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return APValue(); 83491110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 83591110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 83691110ee24e3475e0a3a38938c7b98439b5cf0b0eEli FriedmanAPValue VectorExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 83791110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 83891110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman Info.EvalResult.HasSideEffects = true; 83991110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman return GetZeroVector(E->getType()); 84091110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman} 84191110ee24e3475e0a3a38938c7b98439b5cf0b0eEli Friedman 84259b5da6d853b4368b984700315adf7b37de05764Nate Begeman//===----------------------------------------------------------------------===// 843f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner// Integer Evaluation 844f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 845f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 846f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnernamespace { 847770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass IntExprEvaluator 848b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner : public StmtVisitor<IntExprEvaluator, bool> { 84987eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner EvalInfo &Info; 85030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue &Result; 851f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattnerpublic: 85230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar IntExprEvaluator(EvalInfo &info, APValue &result) 85387eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner : Info(info), Result(result) {} 854f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 8553f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar bool Success(const llvm::APSInt &SI, const Expr *E) { 8562ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 8572ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 85830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.isSigned() == E->getType()->isSignedIntegerType() && 8593f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 86030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(SI.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 8613f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 86230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(SI); 8633f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 8643f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 8653f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar 866131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(const llvm::APInt &I, const Expr *E) { 8672ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 8682ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 86930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar assert(I.getBitWidth() == Info.Ctx.getIntWidth(E->getType()) && 8703f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar "Invalid evaluation result."); 87130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(APSInt(I)); 87230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt().setIsUnsigned(E->getType()->isUnsignedIntegerType()); 873131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 874131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 875131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 876131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar bool Success(uint64_t Value, const Expr *E) { 8772ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType() && 8782ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor "Invalid evaluation result."); 87930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = APValue(Info.Ctx.MakeIntValue(Value, E->getType())); 880131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return true; 881131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 882131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 88382206e267ce6cc709797127616f64672d255b310Anders Carlsson bool Error(SourceLocation L, diag::kind D, const Expr *E) { 88432fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner // Take the first error. 88554da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson if (Info.EvalResult.Diag == 0) { 88654da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.DiagLoc = L; 88754da0496616cb898596cfd5fae1f824098bd8435Anders Carlsson Info.EvalResult.Diag = D; 88882206e267ce6cc709797127616f64672d255b310Anders Carlsson Info.EvalResult.DiagExpr = E; 88932fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 89054176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner return false; 8917a76778e218da57a3b10c80066a0a938f28987b6Chris Lattner } 8921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 893f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 894f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner // Visitor Methods 895f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner //===--------------------------------------------------------------------===// 8961eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 89732fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitStmt(Stmt *) { 89832fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner assert(0 && "This should be called on integers, stmts are not integers"); 89932fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner return false; 90032fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner } 9011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 90232fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner bool VisitExpr(Expr *E) { 9030e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 904f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner } 9051eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 906b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 907f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 9084c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitIntegerLiteral(const IntegerLiteral *E) { 909131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 9104c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 9114c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitCharacterLiteral(const CharacterLiteral *E) { 912131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 9134c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 9144c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner bool VisitTypesCompatibleExpr(const TypesCompatibleExpr *E) { 915ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // Per gcc docs "this built-in function ignores top level 916ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // qualifiers". We need to use the canonical version to properly 917ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // be able to strip CRV qualifiers from the type. 918ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T0 = Info.Ctx.getCanonicalType(E->getArgType1()); 919ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T1 = Info.Ctx.getCanonicalType(E->getArgType2()); 9201eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(Info.Ctx.typesAreCompatible(T0.getUnqualifiedType(), 921131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar T1.getUnqualifiedType()), 922131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 9234c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner } 924043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 925043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool CheckReferencedDecl(const Expr *E, const Decl *D); 926043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitDeclRefExpr(const DeclRefExpr *E) { 927043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return CheckReferencedDecl(E, E->getDecl()); 928043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 929043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman bool VisitMemberExpr(const MemberExpr *E) { 930043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (CheckReferencedDecl(E, E->getMemberDecl())) { 931043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman // Conservatively assume a MemberExpr will have side-effects 932043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman Info.EvalResult.HasSideEffects = true; 933043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return true; 934043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 935043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman return false; 936043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman } 937043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman 938c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman bool VisitCallExpr(CallExpr *E); 939b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitBinaryOperator(const BinaryOperator *E); 9408ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor bool VisitOffsetOfExpr(const OffsetOfExpr *E); 941b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner bool VisitUnaryOperator(const UnaryOperator *E); 942ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes bool VisitConditionalOperator(const ConditionalOperator *E); 943f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 944a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar bool VisitCastExpr(CastExpr* E); 9450518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl bool VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E); 9460518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 9473068d117951a8df54bae9db039b56201ab10962bAnders Carlsson bool VisitCXXBoolLiteralExpr(const CXXBoolLiteralExpr *E) { 948131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getValue(), E); 9493068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 9501eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 9513f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson bool VisitGNUNullExpr(const GNUNullExpr *E) { 952131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 9533f70456b8adb0405ef2a47d51f9fc2d5937ae8aeAnders Carlsson } 9541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 955ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor bool VisitCXXScalarValueInitExpr(const CXXScalarValueInitExpr *E) { 956131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(0, E); 9573068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 9583068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 959664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitImplicitValueInitExpr(const ImplicitValueInitExpr *E) { 960664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 961664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman } 962664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 96364b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl bool VisitUnaryTypeTraitExpr(const UnaryTypeTraitExpr *E) { 9640dfd848fa4c9664852ba8c929a8bd3fce93ddca2Sebastian Redl return Success(E->getValue(), E); 96564b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl } 96664b45f7e0d3167f040841ac2920aead7f080730dSebastian Redl 9676ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet bool VisitBinaryTypeTraitExpr(const BinaryTypeTraitExpr *E) { 9686ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet return Success(E->getValue(), E); 9696ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet } 9706ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet 971ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) { 972ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman return Visit(E->getChosenSubExpr(Info.Ctx)); 973ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman } 974ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 975722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman bool VisitUnaryReal(const UnaryOperator *E); 976664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman bool VisitUnaryImag(const UnaryOperator *E); 977664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 978295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl bool VisitCXXNoexceptExpr(const CXXNoexceptExpr *E); 979295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl 980fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattnerprivate: 9818b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfExpr(const Expr *E); 9828b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck CharUnits GetAlignOfType(QualType T); 98342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall static QualType GetObjectType(const Expr *E); 98442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall bool TryEvaluateBuiltinObjectSize(CallExpr *E); 985664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman // FIXME: Missing: array subscript of vector, member of vector 986f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner}; 987f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} // end anonymous namespace 988f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 98969ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateIntegerOrLValue(const Expr* E, APValue &Result, EvalInfo &Info) { 9902ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType()); 99169ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar return IntExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 99269ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar} 99369ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar 99469ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbarstatic bool EvaluateInteger(const Expr* E, APSInt &Result, EvalInfo &Info) { 9952ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor assert(E->getType()->isIntegralOrEnumerationType()); 9967db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall 99730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar APValue Val; 99869ab26a8623141f35e86817cfc6e0fbe7639a40fDaniel Dunbar if (!EvaluateIntegerOrLValue(E, Val, Info) || !Val.isInt()) 99930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 100030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result = Val.getInt(); 100130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return true; 1002f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner} 1003f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 1004043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedmanbool IntExprEvaluator::CheckReferencedDecl(const Expr* E, const Decl* D) { 10054c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Enums are integer constant exprs. 100629a7f3342c3c6dd15d914c61ae22246c36d51ce7Eli Friedman if (const EnumConstantDecl *ECD = dyn_cast<EnumConstantDecl>(D)) 100729a7f3342c3c6dd15d914c61ae22246c36d51ce7Eli Friedman return Success(ECD->getInitVal(), E); 1008b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 1009b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl // In C++, const, non-volatile integers initialized with ICEs are ICEs. 1010e1646da3bb0fe97b372e5fe8cefc537b22048fc4Eli Friedman // In C, they can also be folded, although they are not ICEs. 1011cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor if (Info.Ctx.getCanonicalType(E->getType()).getCVRQualifiers() 1012cf3293eaeb3853d12cff47e648bbe835004e929fDouglas Gregor == Qualifiers::Const) { 1013f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson 1014f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson if (isa<ParmVarDecl>(D)) 1015f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1016f6b6025a4e26bb0295a57e0efece73253038f278Anders Carlsson 1017043097507f99b1156bfd8bad41e7d5166ae4b9b6Eli Friedman if (const VarDecl *VD = dyn_cast<VarDecl>(D)) { 101831310a21fb2a9f13950f864f681c86080b05d5b2Sebastian Redl if (const Expr *Init = VD->getAnyInitializer()) { 1019c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (APValue *V = VD->getEvaluatedValue()) { 1020c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (V->isInt()) 1021c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Success(V->getInt(), E); 1022c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1023c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman } 1024c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 1025c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman if (VD->isEvaluatingValue()) 1026c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1027c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 1028c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatingValue(); 1029c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman 1030a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman Expr::EvalResult EResult; 1031a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman if (Init->Evaluate(EResult, Info.Ctx) && !EResult.HasSideEffects && 1032a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman EResult.Val.isInt()) { 103378d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor // Cache the evaluated value in the variable declaration. 1034a7dedf7004e8ac3f947d6817370b2778fa648c2bEli Friedman Result = EResult.Val; 1035c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatedValue(Result); 103678d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor return true; 103778d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 103878d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor 1039c013118155077cf8bdaef743c5dbce760114eed3Eli Friedman VD->setEvaluatedValue(APValue()); 104078d1583d0b36b7d6d8d10234cdc19ab94adf765aDouglas Gregor } 1041b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 1042b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl } 1043b2bc62bd35129f09d0746ef6a5ef4dc392b6d6e1Sebastian Redl 10444c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // Otherwise, random variable references are not constants. 10450e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 10464c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 10474c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner 1048a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// EvaluateBuiltinClassifyType - Evaluate __builtin_classify_type the same way 1049a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner/// as GCC. 1050a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattnerstatic int EvaluateBuiltinClassifyType(const CallExpr *E) { 1051a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // The following enum mimics the values returned by GCC. 10527c80bd64032e610c0dbd74fc0ef6ea334447f2fdSebastian Redl // FIXME: Does GCC differ between lvalue and rvalue references here? 1053a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enum gcc_type_class { 1054a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner no_type_class = -1, 1055a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner void_type_class, integer_type_class, char_type_class, 1056a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner enumeral_type_class, boolean_type_class, 1057a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner pointer_type_class, reference_type_class, offset_type_class, 1058a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner real_type_class, complex_type_class, 1059a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner function_type_class, method_type_class, 1060a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner record_type_class, union_type_class, 1061a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner array_type_class, string_type_class, 1062a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner lang_type_class 1063a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner }; 10641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 10651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // If no argument was supplied, default to "no_type_class". This isn't 1066a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // ideal, however it is what gcc does. 1067a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (E->getNumArgs() == 0) 1068a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return no_type_class; 10691eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1070a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner QualType ArgTy = E->getArg(0)->getType(); 1071a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (ArgTy->isVoidType()) 1072a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return void_type_class; 1073a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isEnumeralType()) 1074a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return enumeral_type_class; 1075a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isBooleanType()) 1076a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return boolean_type_class; 1077a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isCharType()) 1078a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return string_type_class; // gcc doesn't appear to use char_type_class 1079a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isIntegerType()) 1080a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return integer_type_class; 1081a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isPointerType()) 1082a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return pointer_type_class; 1083a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isReferenceType()) 1084a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return reference_type_class; 1085a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isRealType()) 1086a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return real_type_class; 1087a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isComplexType()) 1088a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return complex_type_class; 1089a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isFunctionType()) 1090a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return function_type_class; 1091fb87b89fc9eb103e19fb8e4b925c23f0bd091b99Douglas Gregor else if (ArgTy->isStructureOrClassType()) 1092a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return record_type_class; 1093a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 1094a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 1095a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isArrayType()) 1096a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return array_type_class; 1097a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else if (ArgTy->isUnionType()) 1098a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return union_type_class; 1099a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner else // FIXME: offset_type_class, method_type_class, & lang_type_class? 1100a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner assert(0 && "CallExpr::isBuiltinClassifyType(): unimplemented type"); 1101a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner return -1; 1102a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner} 1103a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 110442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// Retrieves the "underlying object type" of the given expression, 110542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// as used by __builtin_object_size. 110642c8f87eb60958170c46767273bf93e6c96125bfJohn McCallQualType IntExprEvaluator::GetObjectType(const Expr *E) { 110742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) { 110842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (const VarDecl *VD = dyn_cast<VarDecl>(DRE->getDecl())) 110942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return VD->getType(); 111042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } else if (isa<CompoundLiteralExpr>(E)) { 111142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return E->getType(); 111242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall } 111342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 111442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return QualType(); 111542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 111642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 111742c8f87eb60958170c46767273bf93e6c96125bfJohn McCallbool IntExprEvaluator::TryEvaluateBuiltinObjectSize(CallExpr *E) { 111842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // TODO: Perhaps we should let LLVM lower this? 111942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall LValue Base; 112042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!EvaluatePointer(E->getArg(0), Base, Info)) 112142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 112242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 112342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall // If we can prove the base is null, lower to zero now. 112442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall const Expr *LVBase = Base.getLValueBase(); 112542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!LVBase) return Success(0, E); 112642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 112742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall QualType T = GetObjectType(LVBase); 112842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (T.isNull() || 112942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isIncompleteType() || 11301357869bc5983cdfbc986db1f3d18265bb34cb0eEli Friedman T->isFunctionType() || 113142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isVariablyModifiedType() || 113242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall T->isDependentType()) 113342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 113442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 113542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Size = Info.Ctx.getTypeSizeInChars(T); 113642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall CharUnits Offset = Base.getLValueOffset(); 113742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 113842c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (!Offset.isNegative() && Offset <= Size) 113942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size -= Offset; 114042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall else 114142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall Size = CharUnits::Zero(); 114242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return Success(Size.getQuantity(), E); 114342c8f87eb60958170c46767273bf93e6c96125bfJohn McCall} 114442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall 1145c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedmanbool IntExprEvaluator::VisitCallExpr(CallExpr *E) { 11463c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 1147019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner default: 11480e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 114964eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 115064eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump case Builtin::BI__builtin_object_size: { 115142c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (TryEvaluateBuiltinObjectSize(E)) 115242c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return true; 115364eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 1154b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // If evaluating the argument has side-effects we can't determine 1155b2aaf51ed73a4774322a39a0dd59d0fe7e3258c0Eric Christopher // the size of the object and lower it to unknown now. 1156393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian if (E->getArg(0)->HasSideEffects(Info.Ctx)) { 11573f27b384801de26ce7efaa395699b42719372f24Benjamin Kramer if (E->getArg(1)->EvaluateAsInt(Info.Ctx).getZExtValue() <= 1) 1158cf184655319cf7a5b811067cff9d26a5741fd161Chris Lattner return Success(-1ULL, E); 115964eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Success(0, E); 116064eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 1161c4c9045dabfc0f0d37dea1b3eb2992654d5b2db1Mike Stump 116264eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 116364eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump } 116464eda9e50b593f935c95bd1edc98c4bfda03f601Mike Stump 1165019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_classify_type: 1166131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(EvaluateBuiltinClassifyType(E), E); 11671eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 11684bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson case Builtin::BI__builtin_constant_p: 1169019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // __builtin_constant_p always has one operand: it returns true if that 1170019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner // operand can be folded, false otherwise. 1171131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(E->getArg(0)->isEvaluatable(Info.Ctx), E); 117221fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner 117321fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner case Builtin::BI__builtin_eh_return_data_regno: { 117421fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner int Operand = E->getArg(0)->EvaluateAsInt(Info.Ctx).getZExtValue(); 117521fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner Operand = Info.Ctx.Target.getEHDataRegisterNumber(Operand); 117621fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner return Success(Operand, E); 117721fb98ee003e992b0c4e204d98a19e0ef544cae3Chris Lattner } 1178c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman 1179c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman case Builtin::BI__builtin_expect: 1180c4a2638b5ef3e2d35d872614ceb655a7a22c58beEli Friedman return Visit(E->getArg(0)); 11815726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 11825726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor case Builtin::BIstrlen: 11835726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor case Builtin::BI__builtin_strlen: 11845726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // As an extension, we support strlen() and __builtin_strlen() as constant 11855726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // expressions when the argument is a string literal. 11865726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor if (StringLiteral *S 11875726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor = dyn_cast<StringLiteral>(E->getArg(0)->IgnoreParenImpCasts())) { 11885726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // The string literal may have embedded null characters. Find the first 11895726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor // one and truncate there. 11905726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor llvm::StringRef Str = S->getString(); 11915726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor llvm::StringRef::size_type Pos = Str.find(0); 11925726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor if (Pos != llvm::StringRef::npos) 11935726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor Str = Str.substr(0, Pos); 11945726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 11955726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor return Success(Str.size(), E); 11965726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor } 11975726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor 11985726d405e71f11feaaf0c8f518abe26e909537a4Douglas Gregor return Error(E->getLocStart(), diag::note_invalid_subexpr_in_ice, E); 1199019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 12004c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner} 1201f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 1202b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 12032de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Comma) { 1204027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson if (!Visit(E->getRHS())) 1205027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return false; 12064fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson 120733ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // If we can't evaluate the LHS, it might have side effects; 120833ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman // conservatively mark it. 120933ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 121033ef1456a19779fb15c51aea362bd9c7cb4087f3Eli Friedman Info.EvalResult.HasSideEffects = true; 1211c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner 1212027f62ec1860f4ab0c91bd863b238938880b8102Anders Carlsson return true; 1213a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1214a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1215a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (E->isLogicalOp()) { 1216a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // These need to be handled specially because the operands aren't 1217a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // necessarily integral 1218fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson bool lhsResult, rhsResult; 12191eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1220fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getLHS(), lhsResult, Info)) { 122151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // We were able to evaluate the LHS, see if we can get away with not 122251fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson // evaluating the RHS: 0 && X -> 0, 1 || X -> 1 12232de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (lhsResult == (E->getOpcode() == BO_LOr)) 12243f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return Success(lhsResult, E); 1225a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1226fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 12272de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_LOr) 1228131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult || rhsResult, E); 12294bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson else 1230131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(lhsResult && rhsResult, E); 12314bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 12324bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } else { 1233fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson if (HandleConversionToBool(E->getRHS(), rhsResult, Info)) { 12344bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // We can't evaluate the LHS; however, sometimes the result 12354bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson // is determined by the RHS: X && 0 -> 0, X || 1 -> 1. 12362de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (rhsResult == (E->getOpcode() == BO_LOr) || 12372de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall !rhsResult == (E->getOpcode() == BO_LAnd)) { 1238131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // Since we weren't able to evaluate the left hand side, it 1239fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson // must have had side effects. 1240fcb4d09531abbf2a5cf398c2f946fb3bc2875f64Anders Carlsson Info.EvalResult.HasSideEffects = true; 1241131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar 1242131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(rhsResult, E); 12434bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 12444bbc0e05a714d4ee4918a92a4a7049dd6ef33ad0Anders Carlsson } 1245a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1246a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1247a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1248c8cc9ccc7b87a7ed1749b074f6b670bcec49abc1Chris Lattner } 124954176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner 1250286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType LHSTy = E->getLHS()->getType(); 1251286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson QualType RHSTy = E->getRHS()->getType(); 12524087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12534087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHSTy->isAnyComplexType()) { 12544087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar assert(RHSTy->isAnyComplexType() && "Invalid comparison"); 1255f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS, RHS; 12564087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12574087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getLHS(), LHS, Info)) 12584087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 12594087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12604087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 12614087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar return false; 12624087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12634087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar if (LHS.isComplexFloat()) { 12641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_r = 12654087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatReal().compare(RHS.getComplexFloatReal()); 12661eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump APFloat::cmpResult CR_i = 12674087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar LHS.getComplexFloatImag().compare(RHS.getComplexFloatImag()); 12684087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar 12692de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) 1270131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((CR_r == APFloat::cmpEqual && 1271131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar CR_i == APFloat::cmpEqual), E); 1272131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 12732de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(E->getOpcode() == BO_NE && 1274131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid complex comparison."); 12751eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(((CR_r == APFloat::cmpGreaterThan || 1276fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpLessThan || 1277fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_r == APFloat::cmpUnordered) || 12781eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump (CR_i == APFloat::cmpGreaterThan || 1279fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpLessThan || 1280fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang CR_i == APFloat::cmpUnordered)), E); 1281131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 12824087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } else { 12832de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) 1284131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() == RHS.getComplexIntReal() && 1285131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() == RHS.getComplexIntImag()), E); 1286131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar else { 12872de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall assert(E->getOpcode() == BO_NE && 1288131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar "Invalid compex comparison."); 1289131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success((LHS.getComplexIntReal() != RHS.getComplexIntReal() || 1290131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar LHS.getComplexIntImag() != RHS.getComplexIntImag()), E); 1291131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar } 12924087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 12934087e24f73d05d96ac2d259679751d054d3ddfbcDaniel Dunbar } 12941eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1295286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (LHSTy->isRealFloatingType() && 1296286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson RHSTy->isRealFloatingType()) { 1297286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat RHS(0.0), LHS(0.0); 12981eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1299286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getRHS(), RHS, Info)) 1300286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 13011eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1302286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson if (!EvaluateFloat(E->getLHS(), LHS, Info)) 1303286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson return false; 13041eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1305286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson APFloat::cmpResult CR = LHS.compare(RHS); 1306529569e68d10b0fd3750fd2124faf742249b846bAnders Carlsson 1307286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson switch (E->getOpcode()) { 1308286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson default: 1309286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson assert(0 && "Invalid binary operator!"); 13102de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: 1311131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan, E); 13122de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: 1313131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpGreaterThan, E); 13142de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: 1315131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpLessThan || CR == APFloat::cmpEqual, E); 13162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: 13171eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan || CR == APFloat::cmpEqual, 1318131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar E); 13192de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: 1320131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(CR == APFloat::cmpEqual, E); 13212de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: 13221eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump return Success(CR == APFloat::cmpGreaterThan 1323fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpLessThan 1324fc39dc4c7886723310419b1869cf651ca55b7af4Mon P Wang || CR == APFloat::cmpUnordered, E); 1325286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 1326286f85e791dda3634fee7f6c67f0ed92296c028fAnders Carlsson } 13271eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1328ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman if (LHSTy->isPointerType() && RHSTy->isPointerType()) { 13292de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Sub || E->isEqualityOp()) { 1330efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LHSValue; 13313068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getLHS(), LHSValue, Info)) 13323068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1333a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1334efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue RHSValue; 13353068d117951a8df54bae9db039b56201ab10962bAnders Carlsson if (!EvaluatePointer(E->getRHS(), RHSValue, Info)) 13363068d117951a8df54bae9db039b56201ab10962bAnders Carlsson return false; 1337a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 13385bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // Reject any bases from the normal codepath; we special-case comparisons 13395bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman // to null. 13405bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (LHSValue.getLValueBase()) { 13415bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 13425bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 1343a73058324197b7bdfd19307965954f626e26199dKen Dyck if (RHSValue.getLValueBase() || !RHSValue.getLValueOffset().isZero()) 13445bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13455bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 13465bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(LHSValue, bres)) 13475bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13482de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall return Success(bres ^ (E->getOpcode() == BO_EQ), E); 13495bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } else if (RHSValue.getLValueBase()) { 13505bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!E->isEqualityOp()) 13515bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 1352a73058324197b7bdfd19307965954f626e26199dKen Dyck if (LHSValue.getLValueBase() || !LHSValue.getLValueOffset().isZero()) 13535bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13545bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman bool bres; 13555bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman if (!EvalPointerValueAsBool(RHSValue, bres)) 13565bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman return false; 13572de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall return Success(bres ^ (E->getOpcode() == BO_EQ), E); 13585bc86103767c2abcbfdd6518e0ccbbbb6aa59e0fEli Friedman } 1359a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 13602de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Sub) { 13614992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType Type = E->getLHS()->getType(); 13624992bdde387c5f033bb450a716eaabc0fda52688Chris Lattner QualType ElementType = Type->getAs<PointerType>()->getPointeeType(); 13633068d117951a8df54bae9db039b56201ab10962bAnders Carlsson 1364a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits ElementSize = CharUnits::One(); 1365ce1bca73aef9bbf6359ab8420278203dda81a054Eli Friedman if (!ElementType->isVoidType() && !ElementType->isFunctionType()) 1366a73058324197b7bdfd19307965954f626e26199dKen Dyck ElementSize = Info.Ctx.getTypeSizeInChars(ElementType); 1367a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1368a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Diff = LHSValue.getLValueOffset() - 1369a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSValue.getLValueOffset(); 1370a73058324197b7bdfd19307965954f626e26199dKen Dyck return Success(Diff / ElementSize, E); 1371ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1372ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman bool Result; 13732de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_EQ) { 1374ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() == RHSValue.getLValueOffset(); 1375267c0ab1b9a15768f3f15abbfc40ce344751c78bEli Friedman } else { 1376ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman Result = LHSValue.getLValueOffset() != RHSValue.getLValueOffset(); 1377ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman } 1378ad02d7debd03ff275ac8ea27891a4ecccdb78068Eli Friedman return Success(Result, E); 13793068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 13803068d117951a8df54bae9db039b56201ab10962bAnders Carlsson } 13812ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!LHSTy->isIntegralOrEnumerationType() || 13822ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor !RHSTy->isIntegralOrEnumerationType()) { 1383a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // We can't continue from here for non-integral types, and they 1384a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // could potentially confuse the following operations. 1385a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1386a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1387a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 1388a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // The LHS of a constant expr is always evaluated and needed. 138930c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Visit(E->getLHS())) 1390a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; // error in subexpression. 1391d9f4bcda18bfbf79341edd9d381d4b6a3cffe655Eli Friedman 139242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APValue RHSVal; 139342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!EvaluateIntegerOrLValue(E->getRHS(), RHSVal, Info)) 139430c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return false; 139542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 139642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like (unsigned long)&a + 4. 139742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (E->isAdditiveOp() && Result.isLValue() && RHSVal.isInt()) { 1398a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Offset = Result.getLValueOffset(); 1399a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits AdditionalOffset = CharUnits::fromQuantity( 1400a73058324197b7bdfd19307965954f626e26199dKen Dyck RHSVal.getInt().getZExtValue()); 14012de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add) 1402a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset += AdditionalOffset; 140342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman else 1404a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset -= AdditionalOffset; 1405a73058324197b7bdfd19307965954f626e26199dKen Dyck Result = APValue(Result.getLValueBase(), Offset); 140642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 140742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 140842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 140942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // Handle cases like 4 + (unsigned long)&a 14102de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Add && 141142edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman RHSVal.isLValue() && Result.isInt()) { 1412a73058324197b7bdfd19307965954f626e26199dKen Dyck CharUnits Offset = RHSVal.getLValueOffset(); 1413a73058324197b7bdfd19307965954f626e26199dKen Dyck Offset += CharUnits::fromQuantity(Result.getInt().getZExtValue()); 1414a73058324197b7bdfd19307965954f626e26199dKen Dyck Result = APValue(RHSVal.getLValueBase(), Offset); 141542edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman return true; 141642edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman } 141742edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 141842edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman // All the following cases expect both operands to be an integer 141942edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman if (!Result.isInt() || !RHSVal.isInt()) 1420b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1421a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 142242edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman APSInt& RHS = RHSVal.getInt(); 142342edd0d32a729d2735a6fb152ba6bf349bf0a169Eli Friedman 1424a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson switch (E->getOpcode()) { 142532fea9d18cc3658a1b01df5ca6f2ac302625c61dChris Lattner default: 14260e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 14272de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: return Success(Result.getInt() * RHS, E); 14282de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: return Success(Result.getInt() + RHS, E); 14292de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: return Success(Result.getInt() - RHS, E); 14302de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_And: return Success(Result.getInt() & RHS, E); 14312de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Xor: return Success(Result.getInt() ^ RHS, E); 14322de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Or: return Success(Result.getInt() | RHS, E); 14332de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 143454176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 14350e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 143630c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() / RHS, E); 14372de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Rem: 143854176fdb044312b4b77c3da6682d3575b3728d30Chris Lattner if (RHS == 0) 14390e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_expr_divide_by_zero, E); 144030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() % RHS, E); 14412de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shl: { 1442091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall // During constant-folding, a negative shift is an opposite shift. 1443091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall if (RHS.isSigned() && RHS.isNegative()) { 1444091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall RHS = -RHS; 1445091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall goto shift_right; 1446091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall } 1447091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall 1448091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall shift_left: 1449091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall unsigned SA 1450091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall = (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 145130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() << SA, E); 14523f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 14532de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shr: { 1454091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall // During constant-folding, a negative shift is an opposite shift. 1455091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall if (RHS.isSigned() && RHS.isNegative()) { 1456091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall RHS = -RHS; 1457091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall goto shift_left; 1458091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall } 1459091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall 1460091f23f1d6d4bcffd6641cda72a6831e08c02ea7John McCall shift_right: 14611eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump unsigned SA = 146230c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar (unsigned) RHS.getLimitedValue(Result.getInt().getBitWidth()-1); 146330c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(Result.getInt() >> SA, E); 14643f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar } 14651eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 14662de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: return Success(Result.getInt() < RHS, E); 14672de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: return Success(Result.getInt() > RHS, E); 14682de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: return Success(Result.getInt() <= RHS, E); 14692de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: return Success(Result.getInt() >= RHS, E); 14702de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: return Success(Result.getInt() == RHS, E); 14712de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: return Success(Result.getInt() != RHS, E); 1472b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 1473a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 1474a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 1475ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopesbool IntExprEvaluator::VisitConditionalOperator(const ConditionalOperator *E) { 1476a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes bool Cond; 1477a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes if (!HandleConversionToBool(E->getCond(), Cond, Info)) 1478ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes return false; 1479ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 1480a25bd55e63b9ab26ca69390533356aaae7f1a40eNuno Lopes return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 1481ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes} 1482ca7c2eaca35edac066ab7cec15f7ecebbb3731d8Nuno Lopes 14838b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfType(QualType T) { 14845d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 14855d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 14865d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 14875d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 14885d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = T->getAs<ReferenceType>()) 14895d484e8cf710207010720589d89602233de61d01Sebastian Redl T = Ref->getPointeeType(); 14905d484e8cf710207010720589d89602233de61d01Sebastian Redl 1491e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the alignment. 1492e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner unsigned CharSize = Info.Ctx.Target.getCharWidth(); 149318857644059c45da6776f1a288eec7b4cf3a844aDouglas Gregor 14942be586108bb401019647791feca19ea03fd477ceEli Friedman // __alignof is defined to return the preferred alignment. 14958b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return CharUnits::fromQuantity( 14968b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck Info.Ctx.getPreferredTypeAlign(T.getTypePtr()) / CharSize); 1497e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1498e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 14998b752f10c394b140f9ef89e049cbad1a7676fc25Ken DyckCharUnits IntExprEvaluator::GetAlignOfExpr(const Expr *E) { 1500af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner E = E->IgnoreParens(); 1501af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1502af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner // alignof decl is always accepted, even if it doesn't make sense: we default 15031eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // to 1 in those cases. 1504af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(E)) 15058b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(DRE->getDecl(), 15068b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 1507a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1508af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) 15098b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Info.Ctx.getDeclAlign(ME->getMemberDecl(), 15108b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck /*RefAsPointee*/true); 1511af707ab8fbb9451e8febb8d766f6c043628125c4Chris Lattner 1512e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner return GetAlignOfType(E->getType()); 1513e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner} 1514e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 1515e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner 15160518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// VisitSizeAlignOfExpr - Evaluate a sizeof or alignof with a result as the 15170518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl/// expression's type. 15180518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redlbool IntExprEvaluator::VisitSizeOfAlignOfExpr(const SizeOfAlignOfExpr *E) { 1519e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Handle alignof separately. 1520e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!E->isSizeOf()) { 1521e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (E->isArgumentType()) 15228b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Success(GetAlignOfType(E->getArgumentType()).getQuantity(), E); 1523e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner else 15248b752f10c394b140f9ef89e049cbad1a7676fc25Ken Dyck return Success(GetAlignOfExpr(E->getArgumentExpr()).getQuantity(), E); 1525e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner } 1526a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 15270518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType SrcTy = E->getTypeOfArgument(); 15285d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.sizeof]p2: "When applied to a reference or a reference type, 15295d484e8cf710207010720589d89602233de61d01Sebastian Redl // the result is the size of the referenced type." 15305d484e8cf710207010720589d89602233de61d01Sebastian Redl // C++ [expr.alignof]p3: "When alignof is applied to a reference type, the 15315d484e8cf710207010720589d89602233de61d01Sebastian Redl // result shall be the alignment of the referenced type." 15325d484e8cf710207010720589d89602233de61d01Sebastian Redl if (const ReferenceType *Ref = SrcTy->getAs<ReferenceType>()) 15335d484e8cf710207010720589d89602233de61d01Sebastian Redl SrcTy = Ref->getPointeeType(); 15340518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl 1535131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // sizeof(void), __alignof__(void), sizeof(function) = 1 as a gcc 1536131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar // extension. 1537131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar if (SrcTy->isVoidType() || SrcTy->isFunctionType()) 1538131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(1, E); 1539a1f47c447a919c6a05c63801cb6a52c4c288e2ccEli Friedman 1540fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. 1541e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner if (!SrcTy->isConstantSizeType()) 1542fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner return false; 1543f2da9dfef96dc11b7b5effb1d02cb427b2d71599Eli Friedman 1544e9feb475d72ba50dc29cec62a8c47cae721065ebChris Lattner // Get information about the size. 1545199c3d6cd16aebbb9c7f0d42af9d922c9628bf70Ken Dyck return Success(Info.Ctx.getTypeSizeInChars(SrcTy).getQuantity(), E); 1546fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner} 1547fcee0019b76f9f368f2b3d6d4048a98232593f29Chris Lattner 15488ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregorbool IntExprEvaluator::VisitOffsetOfExpr(const OffsetOfExpr *E) { 15498ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits Result; 15508ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor unsigned n = E->getNumComponents(); 15518ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor OffsetOfExpr* OOE = const_cast<OffsetOfExpr*>(E); 15528ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (n == 0) 15538ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15548ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor QualType CurrentType = E->getTypeSourceInfo()->getType(); 15558ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor for (unsigned i = 0; i != n; ++i) { 15568ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor OffsetOfExpr::OffsetOfNode ON = OOE->getComponent(i); 15578ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor switch (ON.getKind()) { 15588ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Array: { 15598ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Expr *Idx = OOE->getIndexExpr(ON.getArrayExprIndex()); 15608ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor APSInt IdxResult; 15618ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!EvaluateInteger(Idx, IdxResult, Info)) 15628ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15638ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ArrayType *AT = Info.Ctx.getAsArrayType(CurrentType); 15648ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!AT) 15658ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15668ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = AT->getElementType(); 15678ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CharUnits ElementSize = Info.Ctx.getTypeSizeInChars(CurrentType); 15688ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Result += IdxResult.getSExtValue() * ElementSize; 15698ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 15708ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 15718ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 15728ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Field: { 15738ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor FieldDecl *MemberDecl = ON.getField(); 15748ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 15758ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (!RT) 15768ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return false; 15778ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor RecordDecl *RD = RT->getDecl(); 15788ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 15798ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor unsigned i = 0; 15808ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor // FIXME: It would be nice if we didn't have to loop here! 15818ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor for (RecordDecl::field_iterator Field = RD->field_begin(), 15828ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor FieldEnd = RD->field_end(); 15838ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor Field != FieldEnd; (void)++Field, ++i) { 15848ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor if (*Field == MemberDecl) 15858ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 15868ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 1587cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor assert(i < RL.getFieldCount() && "offsetof field in wrong type"); 1588cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor Result += CharUnits::fromQuantity( 1589cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor RL.getFieldOffset(i) / Info.Ctx.getCharWidth()); 15908ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor CurrentType = MemberDecl->getType().getNonReferenceType(); 15918ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor break; 15928ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 15938ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 15948ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor case OffsetOfExpr::OffsetOfNode::Identifier: 15958ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor llvm_unreachable("dependent __builtin_offsetof"); 1596cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1597cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1598cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor case OffsetOfExpr::OffsetOfNode::Base: { 1599cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CXXBaseSpecifier *BaseSpec = ON.getBase(); 1600cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (BaseSpec->isVirtual()) 1601cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1602cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1603cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the layout of the class whose base we are looking into. 1604cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *RT = CurrentType->getAs<RecordType>(); 1605cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (!RT) 1606cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1607cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor RecordDecl *RD = RT->getDecl(); 1608cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const ASTRecordLayout &RL = Info.Ctx.getASTRecordLayout(RD); 1609cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1610cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Find the base class itself. 1611cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor CurrentType = BaseSpec->getType(); 1612cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor const RecordType *BaseRT = CurrentType->getAs<RecordType>(); 1613cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor if (!BaseRT) 1614cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor return false; 1615cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor 1616cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor // Add the offset to the base. 1617cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor Result += CharUnits::fromQuantity( 1618a14f5979572aa25c03d24750ee4724d2031d4edeAnders Carlsson RL.getBaseClassOffsetInBits(cast<CXXRecordDecl>(BaseRT->getDecl())) 1619cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor / Info.Ctx.getCharWidth()); 1620cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor break; 1621cc8a5d5f90bbbbcb46f342117b851b7e07ec34f1Douglas Gregor } 16228ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 16238ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor } 16248ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor return Success(Result.getQuantity(), E); 16258ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor} 16268ecdb65716cd7914ffb2eeee993fa9039fcd31e8Douglas Gregor 1627b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattnerbool IntExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 16282de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == UO_LNot) { 1629a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // LNot's operand isn't necessarily an integer, so we handle it specially. 1630a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman bool bres; 1631a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!HandleConversionToBool(E->getSubExpr(), bres, Info)) 1632a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 1633131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(!bres, E); 1634a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 1635a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman 16364fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar // Only handle integral operations... 16372ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!E->getSubExpr()->getType()->isIntegralOrEnumerationType()) 16384fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar return false; 16394fff4819a913c65ae23cfd389bc47c61919e4e1fDaniel Dunbar 164087eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner // Get the operand value into 'Result'. 164187eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!Visit(E->getSubExpr())) 164275a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner return false; 1643a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson 164475a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner switch (E->getOpcode()) { 16454c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner default: 164675a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 164775a4881047deeb3a300ff9293dc6ba8570048bb5Chris Lattner // See C99 6.6p3. 16480e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getOperatorLoc(), diag::note_invalid_subexpr_in_ice, E); 16492de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: 16504c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // FIXME: Should extension allow i-c-e extension expressions in its scope? 16514c4867e140327fa3b56306fa03c64c8e6a7c95efChris Lattner // If so, we could clear the diagnostic ID. 16523f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 16532de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 16541eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump // The result is always just the subexpr. 16553f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar return true; 16562de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 165730c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 165830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(-Result.getInt(), E); 16592de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 166030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar if (!Result.isInt()) return false; 166130c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar return Success(~Result.getInt(), E); 166206a3675627e3b3c47b49c689c8e404a33144194aAnders Carlsson } 1663a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 16641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1665732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// HandleCast - This is used to evaluate implicit or explicit casts where the 1666732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner/// result type is integer. 1667a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbarbool IntExprEvaluator::VisitCastExpr(CastExpr *E) { 166882206e267ce6cc709797127616f64672d255b310Anders Carlsson Expr *SubExpr = E->getSubExpr(); 166982206e267ce6cc709797127616f64672d255b310Anders Carlsson QualType DestType = E->getType(); 1670b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar QualType SrcType = SubExpr->getType(); 167182206e267ce6cc709797127616f64672d255b310Anders Carlsson 16724efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (DestType->isBooleanType()) { 16734efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool BoolResult; 16744efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!HandleConversionToBool(SubExpr, BoolResult, Info)) 16754efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 1676131eb438d8c216b2e2a4f8fa8158ea88b787dc14Daniel Dunbar return Success(BoolResult, E); 16774efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 16784efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1679a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson // Handle simple integer->integer casts. 16802ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (SrcType->isIntegralOrEnumerationType()) { 1681732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner if (!Visit(SubExpr)) 1682b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 1683a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar 1684be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!Result.isInt()) { 1685be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // Only allow casts of lvalues if they are lossless. 1686be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return Info.Ctx.getTypeSize(DestType) == Info.Ctx.getTypeSize(SrcType); 1687be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 168830c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar 1689dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, 169030c37f4d2ee5811e85f692c22fb67d74ddc88079Daniel Dunbar Result.getInt(), Info.Ctx), E); 1691732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner } 16921eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1693732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner // FIXME: Clean this up! 1694b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (SrcType->isPointerType()) { 1695efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 169687eae5ecf94e38baa20d9a327b8f73f8bdc72436Chris Lattner if (!EvaluatePointer(SubExpr, LV, Info)) 1697b542afe02d317411d53b3541946f9f2a8f509a11Chris Lattner return false; 16984efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1699dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (LV.getLValueBase()) { 1700dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar // Only allow based lvalue casts if they are lossless. 1701dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(SrcType)) 1702dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return false; 1703dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar 1704efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result); 1705dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return true; 1706dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar } 17074efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1708a73058324197b7bdfd19307965954f626e26199dKen Dyck APSInt AsInt = Info.Ctx.MakeIntValue(LV.getLValueOffset().getQuantity(), 1709a73058324197b7bdfd19307965954f626e26199dKen Dyck SrcType); 1710dd2116462ae311043986ae8b7fba27e68c1b2e66Daniel Dunbar return Success(HandleIntToIntCast(DestType, SrcType, AsInt, Info.Ctx), E); 17112bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson } 17124efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 1713be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (SrcType->isArrayType() || SrcType->isFunctionType()) { 1714be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // This handles double-conversion cases, where there's both 1715be26570e3faa009bdcefedfaf04473e518940520Eli Friedman // an l-value promotion and an implicit conversion to int. 1716efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 1717be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (!EvaluateLValue(SubExpr, LV, Info)) 1718be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1719be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1720be26570e3faa009bdcefedfaf04473e518940520Eli Friedman if (Info.Ctx.getTypeSize(DestType) != Info.Ctx.getTypeSize(Info.Ctx.VoidPtrTy)) 1721be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return false; 1722be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 1723efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result); 1724be26570e3faa009bdcefedfaf04473e518940520Eli Friedman return true; 1725be26570e3faa009bdcefedfaf04473e518940520Eli Friedman } 1726be26570e3faa009bdcefedfaf04473e518940520Eli Friedman 17271725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (SrcType->isAnyComplexType()) { 1728f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue C; 17291725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (!EvaluateComplex(SubExpr, C, Info)) 17301725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return false; 17311725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (C.isComplexFloat()) 17321725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleFloatToIntCast(DestType, SrcType, 17331725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexFloatReal(), Info.Ctx), 17341725f683432715e5afe34d476024bd6f16eac3fcEli Friedman E); 17351725f683432715e5afe34d476024bd6f16eac3fcEli Friedman else 17361725f683432715e5afe34d476024bd6f16eac3fcEli Friedman return Success(HandleIntToIntCast(DestType, SrcType, 17371725f683432715e5afe34d476024bd6f16eac3fcEli Friedman C.getComplexIntReal(), Info.Ctx), E); 17381725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 17392217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman // FIXME: Handle vectors 17402217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1741b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar if (!SrcType->isRealFloatingType()) 17420e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1743732b2236ae4a4f11e7642677cebbd169c07ea877Chris Lattner 1744d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat F(0.0); 1745d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(SubExpr, F, Info)) 17460e8acbbba71ec6acd5dceb4fcbce63e463e1b755Anders Carlsson return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 17471eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1748b92dac8bc2f6f73919825f9af693a8a7e89ae1d4Daniel Dunbar return Success(HandleFloatToIntCast(DestType, SrcType, F, Info.Ctx), E); 1749a25ae3d68d84d2b89907f998df6a396549589da5Anders Carlsson} 17502bad1687fe6f00e10767a691a33b070b151902b6Anders Carlsson 1751722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedmanbool IntExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 1752722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 1753f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 1754722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1755722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1756722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntReal(), E); 1757722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1758722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1759722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Visit(E->getSubExpr()); 1760722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman} 1761722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1762664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedmanbool IntExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 1763722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (E->getSubExpr()->getType()->isComplexIntegerType()) { 1764f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LV; 1765722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman if (!EvaluateComplex(E->getSubExpr(), LV, Info) || !LV.isComplexInt()) 1766722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Error(E->getExprLoc(), diag::note_invalid_subexpr_in_ice, E); 1767722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman return Success(LV.getComplexIntImag(), E); 1768722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman } 1769722c717cd833e410ca6e7976d78baea16995e0c4Eli Friedman 1770664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 1771664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman Info.EvalResult.HasSideEffects = true; 1772664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman return Success(0, E); 1773664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman} 1774664a104ba0b8f47b8908ec6af694d9646adba1fcEli Friedman 1775295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redlbool IntExprEvaluator::VisitCXXNoexceptExpr(const CXXNoexceptExpr *E) { 1776295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl return Success(E->getValue(), E); 1777295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl} 1778295995c9c3196416372c9cd35d9cedb6da37bd3dSebastian Redl 1779f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 1780d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman// Float Evaluation 1781d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 1782d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1783d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmannamespace { 1784770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass FloatExprEvaluator 1785d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : public StmtVisitor<FloatExprEvaluator, bool> { 1786d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman EvalInfo &Info; 1787d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman APFloat &Result; 1788d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanpublic: 1789d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman FloatExprEvaluator(EvalInfo &info, APFloat &result) 1790d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman : Info(info), Result(result) {} 1791d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1792d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitStmt(Stmt *S) { 1793d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 1794d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 1795d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1796d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 1797019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner bool VisitCallExpr(const CallExpr *E); 1798d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 17995db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar bool VisitUnaryOperator(const UnaryOperator *E); 1800d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 1801d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman bool VisitFloatingLiteral(const FloatingLiteral *E); 18024efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman bool VisitCastExpr(CastExpr *E); 1803ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor bool VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E); 180467f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman bool VisitConditionalOperator(ConditionalOperator *E); 18052217c87bdc5ab357046a5453bdb06f469c41024eEli Friedman 1806ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitChooseExpr(const ChooseExpr *E) 1807ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 1808ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman bool VisitUnaryExtension(const UnaryOperator *E) 1809ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman { return Visit(E->getSubExpr()); } 1810abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryReal(const UnaryOperator *E); 1811abd3a857ace59100305790545d1baae5877b8945John McCall bool VisitUnaryImag(const UnaryOperator *E); 1812ba98d6bb414861965a1f22628494ea046785ecd4Eli Friedman 1813189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall bool VisitDeclRefExpr(const DeclRefExpr *E); 1814189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1815abd3a857ace59100305790545d1baae5877b8945John McCall // FIXME: Missing: array subscript of vector, member of vector, 1816abd3a857ace59100305790545d1baae5877b8945John McCall // ImplicitValueInitExpr 1817d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman}; 1818d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} // end anonymous namespace 1819d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1820d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanstatic bool EvaluateFloat(const Expr* E, APFloat& Result, EvalInfo &Info) { 18217db7acbbb84b82d0522266a50ebabc3a52a9e5d1John McCall assert(E->getType()->isRealFloatingType()); 1822d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return FloatExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 1823d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 1824d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 1825db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCallstatic bool TryEvaluateBuiltinNaN(ASTContext &Context, 1826db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall QualType ResultTy, 1827db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const Expr *Arg, 1828db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall bool SNaN, 1829db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APFloat &Result) { 1830db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const StringLiteral *S = dyn_cast<StringLiteral>(Arg->IgnoreParenCasts()); 1831db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (!S) return false; 1832db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1833db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall const llvm::fltSemantics &Sem = Context.getFloatTypeSemantics(ResultTy); 1834db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1835db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall llvm::APInt fill; 1836db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1837db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall // Treat empty strings as if they were zero. 1838db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (S->getString().empty()) 1839db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall fill = llvm::APInt(32, 0); 1840db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else if (S->getString().getAsInteger(0, fill)) 1841db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return false; 1842db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1843db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall if (SNaN) 1844db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getSNaN(Sem, false, &fill); 1845db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall else 1846db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall Result = llvm::APFloat::getQNaN(Sem, false, &fill); 1847db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return true; 1848db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall} 1849db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 1850019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattnerbool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) { 18513c385e5f8d9008fff18597ca302be19fa86e51f6Douglas Gregor switch (E->isBuiltinCall(Info.Ctx)) { 185234a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner default: return false; 1853019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_val: 1854019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_valf: 1855019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_huge_vall: 1856019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inf: 1857019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner case Builtin::BI__builtin_inff: 18587cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar case Builtin::BI__builtin_infl: { 18597cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar const llvm::fltSemantics &Sem = 18607cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar Info.Ctx.getFloatTypeSemantics(E->getType()); 186134a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner Result = llvm::APFloat::getInf(Sem); 186234a74ab81600a40c6324fd76adb724b803dfaf91Chris Lattner return true; 18637cbed03c00e246682e5292785d01e1c120ce54bdDaniel Dunbar } 18641eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 1865db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nans: 1866db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansf: 1867db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall case Builtin::BI__builtin_nansl: 1868db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 1869db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall true, Result); 1870db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall 18719e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nan: 18729e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanf: 18739e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner case Builtin::BI__builtin_nanl: 18744572baba9d18c275968ac113fd73b0e3c77cccb8Mike Stump // If this is __builtin_nan() turn this into a nan, otherwise we 18759e62171a25e3a08fb5c49fb370f83faf5ae786f5Chris Lattner // can't constant fold it. 1876db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall return TryEvaluateBuiltinNaN(Info.Ctx, E->getType(), E->getArg(0), 1877db7b72a82a6834680ccf1eeb51dc57e6d935c655John McCall false, Result); 18785db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 18795db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabs: 18805db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsf: 18815db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_fabsl: 18825db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info)) 18835db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 18841eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 18855db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (Result.isNegative()) 18865db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 18875db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 18885db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 18891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysign: 18901eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump case Builtin::BI__builtin_copysignf: 18915db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar case Builtin::BI__builtin_copysignl: { 18925db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.); 18935db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getArg(0), Result, Info) || 18945db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar !EvaluateFloat(E->getArg(1), RHS, Info)) 18955db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 18965db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.copySign(RHS); 18975db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 18985db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 1899019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner } 1900019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner} 1901019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 1902189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCallbool FloatExprEvaluator::VisitDeclRefExpr(const DeclRefExpr *E) { 1903189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall const Decl *D = E->getDecl(); 1904189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (!isa<VarDecl>(D) || isa<ParmVarDecl>(D)) return false; 1905189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall const VarDecl *VD = cast<VarDecl>(D); 1906189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1907189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall // Require the qualifiers to be const and not volatile. 1908189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall CanQualType T = Info.Ctx.getCanonicalType(E->getType()); 1909189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (!T.isConstQualified() || T.isVolatileQualified()) 1910189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 1911189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1912189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall const Expr *Init = VD->getAnyInitializer(); 1913189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (!Init) return false; 1914189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1915189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (APValue *V = VD->getEvaluatedValue()) { 1916189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (V->isFloat()) { 1917189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall Result = V->getFloat(); 1918189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return true; 1919189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall } 1920189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 1921189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall } 1922189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1923189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (VD->isEvaluatingValue()) 1924189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 1925189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1926189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall VD->setEvaluatingValue(); 1927189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1928189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall Expr::EvalResult InitResult; 1929189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall if (Init->Evaluate(InitResult, Info.Ctx) && !InitResult.HasSideEffects && 1930189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall InitResult.Val.isFloat()) { 1931189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall // Cache the evaluated value in the variable declaration. 1932189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall Result = InitResult.Val.getFloat(); 1933189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall VD->setEvaluatedValue(InitResult.Val); 1934189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return true; 1935189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall } 1936189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1937189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall VD->setEvaluatedValue(APValue()); 1938189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall return false; 1939189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall} 1940189d6ef40eff11b83b2cda941d5ed89a5cef09b2John McCall 1941abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryReal(const UnaryOperator *E) { 194243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 194343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman ComplexValue CV; 194443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 194543efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return false; 194643efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = CV.FloatReal; 194743efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return true; 194843efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman } 194943efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman 195043efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return Visit(E->getSubExpr()); 1951abd3a857ace59100305790545d1baae5877b8945John McCall} 1952abd3a857ace59100305790545d1baae5877b8945John McCall 1953abd3a857ace59100305790545d1baae5877b8945John McCallbool FloatExprEvaluator::VisitUnaryImag(const UnaryOperator *E) { 195443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (E->getSubExpr()->getType()->isAnyComplexType()) { 195543efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman ComplexValue CV; 195643efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!EvaluateComplex(E->getSubExpr(), CV, Info)) 195743efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return false; 195843efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = CV.FloatImag; 195943efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman return true; 196043efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman } 196143efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman 196243efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman if (!E->getSubExpr()->isEvaluatable(Info.Ctx)) 196343efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Info.EvalResult.HasSideEffects = true; 196443efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman const llvm::fltSemantics &Sem = Info.Ctx.getFloatTypeSemantics(E->getType()); 196543efa31fe601bb7c3f132f02246dc3c903d9f361Eli Friedman Result = llvm::APFloat::getZero(Sem); 1966abd3a857ace59100305790545d1baae5877b8945John McCall return true; 1967abd3a857ace59100305790545d1baae5877b8945John McCall} 1968abd3a857ace59100305790545d1baae5877b8945John McCall 19695db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbarbool FloatExprEvaluator::VisitUnaryOperator(const UnaryOperator *E) { 19702de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == UO_Deref) 1971a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes return false; 1972a468d34bed16861f25aff6c8354f4e75d3358c1aNuno Lopes 19735db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar if (!EvaluateFloat(E->getSubExpr(), Result, Info)) 19745db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return false; 19755db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar 19765db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar switch (E->getOpcode()) { 19775db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar default: return false; 19782de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 19795db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 19802de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 19815db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar Result.changeSign(); 19825db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar return true; 19835db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar } 19845db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar} 1985019f4e858e78587f2241ff1a76c747d7bcd7578cChris Lattner 1986d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 19872de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (E->getOpcode() == BO_Comma) { 19887f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!EvaluateFloat(E->getRHS(), Result, Info)) 19897f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return false; 19907f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 19917f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // If we can't evaluate the LHS, it might have side effects; 19927f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman // conservatively mark it. 19937f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman if (!E->getLHS()->isEvaluatable(Info.Ctx)) 19947f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman Info.EvalResult.HasSideEffects = true; 19957f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 19967f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman return true; 19977f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman } 19987f92f0362ef2cf218bc19bb83e1a97dd254b5527Eli Friedman 199996e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson // We can't evaluate pointer-to-member operations. 200096e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson if (E->isPtrMemOp()) 200196e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson return false; 200296e93660124c8028a4c3bcc038ab0cdd18cd7ab2Anders Carlsson 2003d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // FIXME: Diagnostics? I really don't understand how the warnings 2004d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman // and errors are supposed to work. 20055db4b3f3ed9f769d5b02c1d1ccc52bfd71fb9afbDaniel Dunbar APFloat RHS(0.0); 2006d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getLHS(), Result, Info)) 2007d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 2008d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman if (!EvaluateFloat(E->getRHS(), RHS, Info)) 2009d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return false; 2010d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 2011d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman switch (E->getOpcode()) { 2012d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman default: return false; 20132de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 2014d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.multiply(RHS, APFloat::rmNearestTiesToEven); 2015d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 20162de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 2017d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.add(RHS, APFloat::rmNearestTiesToEven); 2018d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 20192de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 2020d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.subtract(RHS, APFloat::rmNearestTiesToEven); 2021d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 20222de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 2023d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result.divide(RHS, APFloat::rmNearestTiesToEven); 2024d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 2025d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman } 2026d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 2027d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 2028d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedmanbool FloatExprEvaluator::VisitFloatingLiteral(const FloatingLiteral *E) { 2029d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman Result = E->getValue(); 2030d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman return true; 2031d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman} 2032d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman 20334efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedmanbool FloatExprEvaluator::VisitCastExpr(CastExpr *E) { 20344efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Expr* SubExpr = E->getSubExpr(); 20351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20362ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (SubExpr->getType()->isIntegralOrEnumerationType()) { 20374efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman APSInt IntResult; 20383f7d995390009fede92b333a040da80e1ce90997Daniel Dunbar if (!EvaluateInteger(SubExpr, IntResult, Info)) 20394efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 20401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result = HandleIntToFloatCast(E->getType(), SubExpr->getType(), 2041a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar IntResult, Info.Ctx); 20424efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 20434efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 20444efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (SubExpr->getType()->isRealFloatingType()) { 20454efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman if (!Visit(SubExpr)) 20464efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 2047a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result = HandleFloatToFloatCast(E->getType(), SubExpr->getType(), 2048a2cfd34952204c9a160fe1a5da5ba2f231df891dDaniel Dunbar Result, Info.Ctx); 20494efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 20504efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman } 2051f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall 2052f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall if (E->getCastKind() == CK_FloatingComplexToReal) { 2053f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall ComplexValue V; 2054f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall if (!EvaluateComplex(SubExpr, V, Info)) 2055f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall return false; 2056f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall Result = V.getComplexFloatReal(); 2057f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall return true; 2058f3ea8cfe6b1c2ef0702efe130561e9e66708d799John McCall } 20594efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 20604efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return false; 20614efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 20624efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 2063ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregorbool FloatExprEvaluator::VisitCXXScalarValueInitExpr(CXXScalarValueInitExpr *E) { 20644efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman Result = APFloat::getZero(Info.Ctx.getFloatTypeSemantics(E->getType())); 20654efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman return true; 20664efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman} 20674efaa276bc0ce8f7baf6138ead11915f3e3e58d9Eli Friedman 206867f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedmanbool FloatExprEvaluator::VisitConditionalOperator(ConditionalOperator *E) { 206967f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman bool Cond; 207067f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman if (!HandleConversionToBool(E->getCond(), Cond, Info)) 207167f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman return false; 207267f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman 207367f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman return Visit(Cond ? E->getTrueExpr() : E->getFalseExpr()); 207467f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman} 207567f85fcdab64f36233a7211f963ed1cccffcbfb8Eli Friedman 2076d8bfe7f25a695ca947effbccdf9ecbe3e018e221Eli Friedman//===----------------------------------------------------------------------===// 2077a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar// Complex Evaluation (for float and integer) 20789ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 20799ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 20809ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonnamespace { 2081770b4a8834670e9427d3ce5a1a8472eb86f45fd2Benjamin Kramerclass ComplexExprEvaluator 2082f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall : public StmtVisitor<ComplexExprEvaluator, bool> { 20839ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson EvalInfo &Info; 2084f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue &Result; 20851eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20869ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlssonpublic: 2087f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexExprEvaluator(EvalInfo &info, ComplexValue &Result) 2088f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall : Info(info), Result(Result) {} 20891eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 20909ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 20919ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson // Visitor Methods 20929ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson //===--------------------------------------------------------------------===// 20939ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2094f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool VisitStmt(Stmt *S) { 2095f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 20969ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson } 20971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2098f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall bool VisitParenExpr(ParenExpr *E) { return Visit(E->getSubExpr()); } 20999ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2100b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitImaginaryLiteral(ImaginaryLiteral *E); 2101a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 2102b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitCastExpr(CastExpr *E); 2103b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2104b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitBinaryOperator(const BinaryOperator *E); 2105b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitChooseExpr(const ChooseExpr *E) 2106b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman { return Visit(E->getChosenSubExpr(Info.Ctx)); } 2107b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman bool VisitUnaryExtension(const UnaryOperator *E) 2108b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman { return Visit(E->getSubExpr()); } 2109b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman // FIXME Missing: unary +/-/~, binary div, ImplicitValueInitExpr, 2110b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman // conditional ?:, comma 2111b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman}; 2112b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} // end anonymous namespace 21131eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2114b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedmanstatic bool EvaluateComplex(const Expr *E, ComplexValue &Result, 2115b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman EvalInfo &Info) { 2116b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman assert(E->getType()->isAnyComplexType()); 2117b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return ComplexExprEvaluator(Info, Result).Visit(const_cast<Expr*>(E)); 2118b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} 2119b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2120b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedmanbool ComplexExprEvaluator::VisitImaginaryLiteral(ImaginaryLiteral *E) { 2121b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Expr* SubExpr = E->getSubExpr(); 2122b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2123b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (SubExpr->getType()->isRealFloatingType()) { 2124b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexFloat(); 2125b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APFloat &Imag = Result.FloatImag; 2126b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateFloat(SubExpr, Imag, Info)) 2127b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2128b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2129b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatReal = APFloat(Imag.getSemantics()); 2130b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 2131b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } else { 2132b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman assert(SubExpr->getType()->isIntegerType() && 2133b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman "Unexpected imaginary literal."); 2134b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2135b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexInt(); 2136b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APSInt &Imag = Result.IntImag; 2137b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateInteger(SubExpr, Imag, Info)) 2138b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2139b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2140b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntReal = APSInt(Imag.getBitWidth(), !Imag.isSigned()); 2141b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 2142b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } 2143b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman} 2144b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2145b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedmanbool ComplexExprEvaluator::VisitCastExpr(CastExpr *E) { 2146b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Expr* SubExpr = E->getSubExpr(); 2147b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman QualType EltType = E->getType()->getAs<ComplexType>()->getElementType(); 2148b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman QualType SubType = SubExpr->getType(); 2149b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 21502bb5d00fcf71a7b4d478d478be778fff0494aff6John McCall // TODO: just trust CastKind 21512bb5d00fcf71a7b4d478d478be778fff0494aff6John McCall 2152b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (SubType->isRealFloatingType()) { 2153b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APFloat &Real = Result.FloatReal; 2154b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateFloat(SubExpr, Real, Info)) 2155b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2156b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman 2157b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (EltType->isRealFloatingType()) { 2158b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexFloat(); 2159b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Real = HandleFloatToFloatCast(EltType, SubType, Real, Info.Ctx); 2160b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatImag = APFloat(Real.getSemantics()); 2161f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2162a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 2163f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexInt(); 2164b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntReal = HandleFloatToIntCast(EltType, SubType, Real, Info.Ctx); 2165b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntImag = APSInt(Result.IntReal.getBitWidth(), 2166b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman !Result.IntReal.isSigned()); 2167f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2168a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 2169b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } else if (SubType->isIntegerType()) { 2170b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman APSInt &Real = Result.IntReal; 2171b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!EvaluateInteger(SubExpr, Real, Info)) 2172b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 21739ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2174b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (EltType->isRealFloatingType()) { 2175b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexFloat(); 2176b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatReal 2177b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman = HandleIntToFloatCast(EltType, SubType, Real, Info.Ctx); 2178b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatImag = APFloat(Result.FloatReal.getSemantics()); 2179b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 2180b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } else { 2181b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.makeComplexInt(); 2182b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Real = HandleIntToIntCast(EltType, SubType, Real, Info.Ctx); 2183b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntImag = APSInt(Real.getBitWidth(), !Real.isSigned()); 2184b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return true; 2185b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } 2186b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } else if (const ComplexType *CT = SubType->getAs<ComplexType>()) { 2187b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (!Visit(SubExpr)) 2188b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 2189ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 2190b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman QualType SrcType = CT->getElementType(); 21911725f683432715e5afe34d476024bd6f16eac3fcEli Friedman 2192b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman if (Result.isComplexFloat()) { 21931725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (EltType->isRealFloatingType()) { 2194f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexFloat(); 2195b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatReal = HandleFloatToFloatCast(EltType, SrcType, 2196b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatReal, 2197b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Info.Ctx); 2198b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatImag = HandleFloatToFloatCast(EltType, SrcType, 2199b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatImag, 2200b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Info.Ctx); 2201f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 22021725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } else { 2203f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexInt(); 2204b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntReal = HandleFloatToIntCast(EltType, SrcType, 2205b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatReal, 2206b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Info.Ctx); 2207b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntImag = HandleFloatToIntCast(EltType, SrcType, 2208b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatImag, 2209b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Info.Ctx); 2210f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 22111725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 2212b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman } else { 2213b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman assert(Result.isComplexInt() && "Invalid evaluate result."); 22141725f683432715e5afe34d476024bd6f16eac3fcEli Friedman if (EltType->isRealFloatingType()) { 2215f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexFloat(); 2216b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatReal = HandleIntToFloatCast(EltType, SrcType, 2217b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntReal, 2218b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Info.Ctx); 2219b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.FloatImag = HandleIntToFloatCast(EltType, SrcType, 2220b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntImag, 2221b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Info.Ctx); 2222f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 22231725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } else { 2224f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall Result.makeComplexInt(); 2225b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntReal = HandleIntToIntCast(EltType, SrcType, 2226b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntReal, 2227b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Info.Ctx); 2228b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntImag = HandleIntToIntCast(EltType, SrcType, 2229b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Result.IntImag, 2230b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman Info.Ctx); 2231f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 22321725f683432715e5afe34d476024bd6f16eac3fcEli Friedman } 2233ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 2234ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 22351eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2236b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman // FIXME: Handle more casts. 2237b2dc7f59fe4c762cba73badc3bbc6f356fcd7b5bEli Friedman return false; 22389ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson} 22399ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson 2240f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCallbool ComplexExprEvaluator::VisitBinaryOperator(const BinaryOperator *E) { 2241f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall if (!Visit(E->getLHS())) 2242f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 22431eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2244f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue RHS; 2245a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (!EvaluateComplex(E->getRHS(), RHS, Info)) 2246f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return false; 2247a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar 22483f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar assert(Result.isComplexFloat() == RHS.isComplexFloat() && 22493f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar "Invalid operands to binary operator."); 2250ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson switch (E->getOpcode()) { 2251f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall default: return false; 22522de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 2253a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 2254a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().add(RHS.getComplexFloatReal(), 2255a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2256a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().add(RHS.getComplexFloatImag(), 2257a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2258a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 2259a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() += RHS.getComplexIntReal(); 2260a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() += RHS.getComplexIntImag(); 2261a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 22623f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 22632de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 2264a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar if (Result.isComplexFloat()) { 2265a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatReal().subtract(RHS.getComplexFloatReal(), 2266a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2267a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexFloatImag().subtract(RHS.getComplexFloatImag(), 2268a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar APFloat::rmNearestTiesToEven); 2269a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } else { 2270a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntReal() -= RHS.getComplexIntReal(); 2271a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar Result.getComplexIntImag() -= RHS.getComplexIntImag(); 2272a5fd07bbc5e4bae542c06643da3fbfe4967a9379Daniel Dunbar } 22733f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 22742de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 22753f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar if (Result.isComplexFloat()) { 2276f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 22773f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_r = LHS.getComplexFloatReal(); 22783f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &LHS_i = LHS.getComplexFloatImag(); 22793f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_r = RHS.getComplexFloatReal(); 22803f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat &RHS_i = RHS.getComplexFloatImag(); 22811eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 22823f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar APFloat Tmp = LHS_r; 22833f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 22843f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal() = Tmp; 22853f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 22863f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 22873f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatReal().subtract(Tmp, APFloat::rmNearestTiesToEven); 22883f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar 22893f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_r; 22903f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_i, APFloat::rmNearestTiesToEven); 22913f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag() = Tmp; 22923f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp = LHS_i; 22933f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Tmp.multiply(RHS_r, APFloat::rmNearestTiesToEven); 22943f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar Result.getComplexFloatImag().add(Tmp, APFloat::rmNearestTiesToEven); 22953f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } else { 2296f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall ComplexValue LHS = Result; 22971eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntReal() = 22983f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntReal() - 22993f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntImag()); 23001eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump Result.getComplexIntImag() = 23013f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar (LHS.getComplexIntReal() * RHS.getComplexIntImag() + 23023f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar LHS.getComplexIntImag() * RHS.getComplexIntReal()); 23033f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar } 23043f2798757c9ee353e207e18115e2e966432a4beeDaniel Dunbar break; 2305ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson } 2306ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 2307f4cf1a18d09d57b757b3cb47eab36c1457091ef7John McCall return true; 2308ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson} 2309ccc3fce5697e33f005990f9795e1c7cb8b4559ecAnders Carlsson 23109ad16aebc0e840a5e7d425da72eb6cbe25e4b58cAnders Carlsson//===----------------------------------------------------------------------===// 23116ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner// Top level Expr::Evaluate method. 2312f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner//===----------------------------------------------------------------------===// 2313f5eeb055ecbadbc25c83df0867cdada2c2559dcfChris Lattner 231442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// Evaluate - Return true if this is a constant which we can fold using 231542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// any crazy technique (that has nothing to do with language standards) that 231642c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// we want to. If this function returns true, it returns the folded constant 231742c8f87eb60958170c46767273bf93e6c96125bfJohn McCall/// in Result. 231842c8f87eb60958170c46767273bf93e6c96125bfJohn McCallbool Expr::Evaluate(EvalResult &Result, ASTContext &Ctx) const { 231942c8f87eb60958170c46767273bf93e6c96125bfJohn McCall const Expr *E = this; 232042c8f87eb60958170c46767273bf93e6c96125bfJohn McCall EvalInfo Info(Ctx, Result); 2321efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (E->getType()->isVectorType()) { 2322efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateVector(E, Info.EvalResult.Val, Info)) 232359b5da6d853b4368b984700315adf7b37de05764Nate Begeman return false; 2324efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isIntegerType()) { 2325efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!IntExprEvaluator(Info, Info.EvalResult.Val).Visit(const_cast<Expr*>(E))) 23266dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 23270f2b692bb10be35fdc60d0a72a847bdd73124670John McCall if (Result.Val.isLValue() && !IsGlobalLValue(Result.Val.getLValueBase())) 23280f2b692bb10be35fdc60d0a72a847bdd73124670John McCall return false; 2329efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->hasPointerRepresentation()) { 2330efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 2331efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluatePointer(E, LV, Info)) 23326dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 2333e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (!IsGlobalLValue(LV.Base)) 233442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall return false; 2335efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Info.EvalResult.Val); 2336efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isRealFloatingType()) { 2337efdb83e26f9a1fd2566afe54461216cd84814d42John McCall llvm::APFloat F(0.0); 2338efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateFloat(E, F, Info)) 23396dde0d5dc09f45f4d9508c964703e36fef1a0198Anders Carlsson return false; 23401eb4433ac451dc16f4133a88af2d002ac26c58efMike Stump 2341efdb83e26f9a1fd2566afe54461216cd84814d42John McCall Info.EvalResult.Val = APValue(F); 2342efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } else if (E->getType()->isAnyComplexType()) { 2343efdb83e26f9a1fd2566afe54461216cd84814d42John McCall ComplexValue C; 2344efdb83e26f9a1fd2566afe54461216cd84814d42John McCall if (!EvaluateComplex(E, C, Info)) 2345660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 2346efdb83e26f9a1fd2566afe54461216cd84814d42John McCall C.moveInto(Info.EvalResult.Val); 2347660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump } else 2348660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return false; 2349660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 2350660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump return true; 2351660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump} 2352660e6f79a138a30a437c02142f23e7ef4eb21b2eMike Stump 2353cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCallbool Expr::EvaluateAsBooleanCondition(bool &Result, ASTContext &Ctx) const { 2354cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalResult Scratch; 2355cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall EvalInfo Info(Ctx, Scratch); 2356cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall 2357cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall return HandleConversionToBool(this, Result, Info); 2358cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall} 2359cd7a445c6b46c5585580dfb652300c8483c0cb6bJohn McCall 23601b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlssonbool Expr::EvaluateAsLValue(EvalResult &Result, ASTContext &Ctx) const { 23611b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson EvalInfo Info(Ctx, Result); 23621b78276a75a5a0f496a82429c1ff9604d622a76dAnders Carlsson 2363efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LValue LV; 236442c8f87eb60958170c46767273bf93e6c96125bfJohn McCall if (EvaluateLValue(this, LV, Info) && 236542c8f87eb60958170c46767273bf93e6c96125bfJohn McCall !Result.HasSideEffects && 2366e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara IsGlobalLValue(LV.Base)) { 2367e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara LV.moveInto(Result.Val); 2368e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return true; 2369e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara } 2370e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return false; 2371e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara} 2372e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2373e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnarabool Expr::EvaluateAsAnyLValue(EvalResult &Result, ASTContext &Ctx) const { 2374e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara EvalInfo Info(Ctx, Result); 2375e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2376e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara LValue LV; 2377e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara if (EvaluateLValue(this, LV, Info)) { 2378efdb83e26f9a1fd2566afe54461216cd84814d42John McCall LV.moveInto(Result.Val); 2379efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return true; 2380efdb83e26f9a1fd2566afe54461216cd84814d42John McCall } 2381efdb83e26f9a1fd2566afe54461216cd84814d42John McCall return false; 2382b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman} 2383b2f295c8050fb8c141bf2cf38eed0a56e99d0092Eli Friedman 23846ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner/// isEvaluatable - Call Evaluate to see if this expression can be constant 238545b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner/// folded, but discard the result. 238645b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattnerbool Expr::isEvaluatable(ASTContext &Ctx) const { 23874fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson EvalResult Result; 23884fdfb0965b396f2778091f7e6c051d17ff9791baAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects; 238945b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner} 239051fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 2391393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanianbool Expr::HasSideEffects(ASTContext &Ctx) const { 2392393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian Expr::EvalResult Result; 2393393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian EvalInfo Info(Ctx, Result); 2394393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian return HasSideEffect(Info).Visit(const_cast<Expr*>(this)); 2395393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian} 2396393c247fe025ccb5f914e37e948192ea86faef8cFariborz Jahanian 239751fe996231b1d7199f76e4005ff4c943d5deeecdAnders CarlssonAPSInt Expr::EvaluateAsInt(ASTContext &Ctx) const { 23981c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 23991c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson bool Result = Evaluate(EvalResult, Ctx); 2400f185319f25efd6094870f287030270fad26085baDaniel Dunbar Result = Result; 240151fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson assert(Result && "Could not evaluate expression"); 24021c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(EvalResult.Val.isInt() && "Expression did not evaluate to integer"); 240351fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson 24041c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson return EvalResult.Val.getInt(); 240551fe996231b1d7199f76e4005ff4c943d5deeecdAnders Carlsson} 2406d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2407e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara bool Expr::EvalResult::isGlobalLValue() const { 2408e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara assert(Val.isLValue()); 2409e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara return IsGlobalLValue(Val.getLValueBase()); 2410e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara } 2411e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2412e17a6436b429e4b18a5e157061fb13bbc677b3b0Abramo Bagnara 2413d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// isIntegerConstantExpr - this recursive routine will test if an expression is 2414d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// an integer constant expression. 2415d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2416d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Pass up a reason why! Invalid operation in i-c-e, division by zero, 2417d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// comma, etc 2418d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// 2419d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// FIXME: Handle offsetof. Two things to do: Handle GCC's __builtin_offsetof 2420d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// to support gcc 4.0+ and handle the idiom GCC recognizes with a null pointer 2421d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall/// cast+dereference. 2422d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2423d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// CheckICE - This function does the fundamental ICE checking: the returned 2424d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// ICEDiag contains a Val of 0, 1, or 2, and a possibly null SourceLocation. 2425d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Note that to reduce code duplication, this helper does no evaluation 2426d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// itself; the caller checks whether the expression is evaluatable, and 2427d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// in the rare cases where CheckICE actually cares about the evaluated 2428d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// value, it calls into Evalute. 2429d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 2430d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// Meanings of Val: 2431d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 0: This expression is an ICE if it can be evaluated by Evaluate. 2432d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 1: This expression is not an ICE, but if it isn't evaluated, it's 2433d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// a legal subexpression for an ICE. This return value is used to handle 2434d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// the comma operator in C99 mode. 2435d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall// 2: This expression is not an ICE, and is not a legal subexpression for one. 2436d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 24373c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmannamespace { 24383c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 2439d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstruct ICEDiag { 2440d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall unsigned Val; 2441d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall SourceLocation Loc; 2442d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2443d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall public: 2444d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag(unsigned v, SourceLocation l) : Val(v), Loc(l) {} 2445d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag() : Val(0) {} 2446d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall}; 2447d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 24483c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman} 24493c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohman 24503c46e8db99196179b30e7ac5c20c4efd5f3926d7Dan Gohmanstatic ICEDiag NoDiag() { return ICEDiag(); } 2451d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2452d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckEvalInICE(const Expr* E, ASTContext &Ctx) { 2453d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 2454d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!E->Evaluate(EVResult, Ctx) || EVResult.HasSideEffects || 2455d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 2456d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2457d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2458d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2459d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 2460d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2461d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallstatic ICEDiag CheckICE(const Expr* E, ASTContext &Ctx) { 2462d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(!E->isValueDependent() && "Should not see value dependent exprs!"); 24632ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (!E->getType()->isIntegralOrEnumerationType()) { 2464d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2465d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2466d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2467d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (E->getStmtClass()) { 2468d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define STMT(Node, Base) case Expr::Node##Class: 2469d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#define EXPR(Node, Base) 2470d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall#include "clang/AST/StmtNodes.inc" 2471d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::PredefinedExprClass: 2472d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::FloatingLiteralClass: 2473d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImaginaryLiteralClass: 2474d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StringLiteralClass: 2475d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ArraySubscriptExprClass: 2476d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::MemberExprClass: 2477d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundAssignOperatorClass: 2478d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CompoundLiteralExprClass: 2479d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ExtVectorElementExprClass: 2480d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::InitListExprClass: 2481d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DesignatedInitExprClass: 2482d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitValueInitExprClass: 2483d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenListExprClass: 2484d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::VAArgExprClass: 2485d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::AddrLabelExprClass: 2486d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::StmtExprClass: 2487d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXMemberCallExprClass: 2488d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDynamicCastExprClass: 2489d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTypeidExprClass: 24909be88403e965cc49af76c9d33d818781d44b333eFrancois Pichet case Expr::CXXUuidofExprClass: 2491d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNullPtrLiteralExprClass: 2492d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThisExprClass: 2493d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXThrowExprClass: 2494d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXNewExprClass: 2495d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDeleteExprClass: 2496d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXPseudoDestructorExprClass: 2497d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedLookupExprClass: 2498d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DependentScopeDeclRefExprClass: 2499d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXConstructExprClass: 2500d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBindTemporaryExprClass: 25014765fa05b5652fcc4356371c2f481d0ea9a1b007John McCall case Expr::ExprWithCleanupsClass: 2502d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXTemporaryObjectExprClass: 2503d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXUnresolvedConstructExprClass: 2504d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDependentScopeMemberExprClass: 2505d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnresolvedMemberExprClass: 2506d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCStringLiteralClass: 2507d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCEncodeExprClass: 2508d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCMessageExprClass: 2509d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCSelectorExprClass: 2510d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCProtocolExprClass: 2511d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIvarRefExprClass: 2512d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCPropertyRefExprClass: 2513d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ObjCIsaExprClass: 2514d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ShuffleVectorExprClass: 2515d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockExprClass: 2516d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BlockDeclRefExprClass: 2517d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::NoStmtClass: 25187cd7d1ad33fdf49eef83942e8855fe20d95aa1b9John McCall case Expr::OpaqueValueExprClass: 2519d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2520d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2521d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::GNUNullExprClass: 2522d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // GCC considers the GNU __null value to be an integral constant expression. 2523d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2524d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2525d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ParenExprClass: 2526d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ParenExpr>(E)->getSubExpr(), Ctx); 2527d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::IntegerLiteralClass: 2528d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CharacterLiteralClass: 2529d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXBoolLiteralExprClass: 2530ed8abf18329df67b0abcbb3a10458bd8c1d2a595Douglas Gregor case Expr::CXXScalarValueInitExprClass: 2531d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::TypesCompatibleExprClass: 2532d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryTypeTraitExprClass: 25336ad6f2848d7652ab2991286eb48be440d3493b28Francois Pichet case Expr::BinaryTypeTraitExprClass: 25342e156225a29407a50dd19041aa5750171ad44ea3Sebastian Redl case Expr::CXXNoexceptExprClass: 2535d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2536d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CallExprClass: 25376cf750298d3621d8a10a6dd07fcee8e274b9d94dSean Hunt case Expr::CXXOperatorCallExprClass: { 2538d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const CallExpr *CE = cast<CallExpr>(E); 2539d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CE->isBuiltinCall(Ctx)) 2540d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 2541d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2542d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2543d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::DeclRefExprClass: 2544d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<EnumConstantDecl>(cast<DeclRefExpr>(E)->getDecl())) 2545d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2546d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Ctx.getLangOptions().CPlusPlus && 2547d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall E->getType().getCVRQualifiers() == Qualifiers::Const) { 2548d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl(); 2549d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2550d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Parameter variables are never constants. Without this check, 2551d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // getAnyInitializer() can find a default argument, which leads 2552d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to chaos. 2553d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<ParmVarDecl>(D)) 2554d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2555d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2556d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C++ 7.1.5.1p2 2557d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // A variable of non-volatile const-qualified integral or enumeration 2558d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // type initialized by an ICE can be used in ICEs. 2559d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const VarDecl *Dcl = dyn_cast<VarDecl>(D)) { 2560d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Qualifiers Quals = Ctx.getCanonicalType(Dcl->getType()).getQualifiers(); 2561d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Quals.hasVolatile() || !Quals.hasConst()) 2562d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2563d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2564d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Look for a declaration of this variable that has an initializer. 2565d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const VarDecl *ID = 0; 2566d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const Expr *Init = Dcl->getAnyInitializer(ID); 2567d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Init) { 2568d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (ID->isInitKnownICE()) { 2569d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // We have already checked whether this subexpression is an 2570d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // integral constant expression. 2571d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (ID->isInitICE()) 2572d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2573d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall else 2574d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2575d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2576d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2577d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // It's an ICE whether or not the definition we found is 2578d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // out-of-line. See DR 721 and the discussion in Clang PR 2579d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // 6206 for details. 2580d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2581d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Dcl->isCheckingICE()) { 2582d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, cast<DeclRefExpr>(E)->getLocation()); 2583d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2584d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2585d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Dcl->setCheckingICE(); 2586d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag Result = CheckICE(Init, Ctx); 2587d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Cache the result of the ICE test. 2588d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Dcl->setInitKnownICE(Result.Val == 0); 2589d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return Result; 2590d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2591d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2592d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2593d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2594d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::UnaryOperatorClass: { 2595d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const UnaryOperator *Exp = cast<UnaryOperator>(E); 2596d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 25972de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PostInc: 25982de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PostDec: 25992de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PreInc: 26002de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_PreDec: 26012de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_AddrOf: 26022de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Deref: 2603d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 26042de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Extension: 26052de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_LNot: 26062de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Plus: 26072de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Minus: 26082de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Not: 26092de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Real: 26102de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case UO_Imag: 2611d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(Exp->getSubExpr(), Ctx); 2612d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2613d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2614d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // OffsetOf falls through here. 2615d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2616d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::OffsetOfExprClass: { 2617d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that per C99, offsetof must be an ICE. And AFAIK, using 2618d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Evaluate matches the proposed gcc behavior for cases like 2619d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // "offsetof(struct s{int x[4];}, x[!.0])". This doesn't affect 2620d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // compliance: we should warn earlier for offsetof expressions with 2621d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // array subscripts that aren't ICEs, and if the array subscripts 2622d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // are ICEs, the value of the offsetof must be an integer constant. 2623d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckEvalInICE(E, Ctx); 2624d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2625d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::SizeOfAlignOfExprClass: { 2626d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const SizeOfAlignOfExpr *Exp = cast<SizeOfAlignOfExpr>(E); 2627d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Exp->isSizeOf() && Exp->getTypeOfArgument()->isVariableArrayType()) 2628d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2629d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2630d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2631d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::BinaryOperatorClass: { 2632d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const BinaryOperator *Exp = cast<BinaryOperator>(E); 2633d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall switch (Exp->getOpcode()) { 26342de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_PtrMemD: 26352de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_PtrMemI: 26362de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Assign: 26372de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_MulAssign: 26382de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_DivAssign: 26392de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_RemAssign: 26402de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AddAssign: 26412de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_SubAssign: 26422de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShlAssign: 26432de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_ShrAssign: 26442de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_AndAssign: 26452de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_XorAssign: 26462de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_OrAssign: 2647d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2648d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 26492de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Mul: 26502de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Div: 26512de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Rem: 26522de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Add: 26532de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Sub: 26542de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shl: 26552de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Shr: 26562de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LT: 26572de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GT: 26582de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LE: 26592de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_GE: 26602de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_EQ: 26612de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_NE: 26622de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_And: 26632de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Xor: 26642de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Or: 26652de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_Comma: { 2666d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 2667d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 26682de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Exp->getOpcode() == BO_Div || 26692de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall Exp->getOpcode() == BO_Rem) { 2670d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Evaluate gives an error for undefined Div/Rem, so make sure 2671d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // we don't evaluate one. 2672d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val != 2 && RHSResult.Val != 2) { 2673d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm::APSInt REval = Exp->getRHS()->EvaluateAsInt(Ctx); 2674d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval == 0) 2675d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2676d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (REval.isSigned() && REval.isAllOnesValue()) { 2677d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm::APSInt LEval = Exp->getLHS()->EvaluateAsInt(Ctx); 2678d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LEval.isMinSignedValue()) 2679d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2680d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2681d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2682d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 26832de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if (Exp->getOpcode() == BO_Comma) { 2684d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Ctx.getLangOptions().C99) { 2685d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // C99 6.6p3 introduces a strange edge case: comma can be in an ICE 2686d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // if it isn't evaluated. 2687d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 0) 2688d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(1, E->getLocStart()); 2689d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } else { 2690d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // In both C89 and C++, commas in ICEs are illegal. 2691d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2692d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2693d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2694d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 2695d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 2696d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 2697d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 26982de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LAnd: 26992de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall case BO_LOr: { 2700d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag LHSResult = CheckICE(Exp->getLHS(), Ctx); 2701d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag RHSResult = CheckICE(Exp->getRHS(), Ctx); 2702d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val == 0 && RHSResult.Val == 1) { 2703d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the RHS has a comma "side-effect"; we need 2704d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // to actually check the condition to see whether the side 2705d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // with the comma is evaluated. 27062de56d1d0c3a504ad1529de2677628bdfbb95cd4John McCall if ((Exp->getOpcode() == BO_LAnd) != 2707d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall (Exp->getLHS()->EvaluateAsInt(Ctx) == 0)) 2708d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 2709d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2710d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2711d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2712d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (LHSResult.Val >= RHSResult.Val) 2713d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return LHSResult; 2714d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return RHSResult; 2715d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2716d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2717d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2718d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ImplicitCastExprClass: 2719d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CStyleCastExprClass: 2720d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXFunctionalCastExprClass: 2721d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXStaticCastExprClass: 2722d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXReinterpretCastExprClass: 2723d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXConstCastExprClass: { 2724d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const Expr *SubExpr = cast<CastExpr>(E)->getSubExpr(); 27252ade35e2cfd554e49d35a52047cea98a82787af9Douglas Gregor if (SubExpr->getType()->isIntegralOrEnumerationType()) 2726d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(SubExpr, Ctx); 2727d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (isa<FloatingLiteral>(SubExpr->IgnoreParens())) 2728d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2729d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2730d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2731d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ConditionalOperatorClass: { 2732d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall const ConditionalOperator *Exp = cast<ConditionalOperator>(E); 2733d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // If the condition (ignoring parens) is a __builtin_constant_p call, 2734d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // then only the true side is actually considered in an integer constant 2735d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // expression, and it is fully evaluated. This is an important GNU 2736d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // extension. See GCC PR38377 for discussion. 2737d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (const CallExpr *CallCE 2738d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall = dyn_cast<CallExpr>(Exp->getCond()->IgnoreParenCasts())) 2739d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CallCE->isBuiltinCall(Ctx) == Builtin::BI__builtin_constant_p) { 2740d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Expr::EvalResult EVResult; 2741d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!E->Evaluate(EVResult, Ctx) || EVResult.HasSideEffects || 2742d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall !EVResult.Val.isInt()) { 2743d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2744d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2745d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2746d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2747d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag CondResult = CheckICE(Exp->getCond(), Ctx); 2748d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag TrueResult = CheckICE(Exp->getTrueExpr(), Ctx); 2749d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag FalseResult = CheckICE(Exp->getFalseExpr(), Ctx); 2750d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 2) 2751d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 2752d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 2) 2753d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 2754d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (FalseResult.Val == 2) 2755d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 2756d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (CondResult.Val == 1) 2757d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CondResult; 2758d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (TrueResult.Val == 0 && FalseResult.Val == 0) 2759d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return NoDiag(); 2760d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Rare case where the diagnostics depend on which side is evaluated 2761d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Note that if we get here, CondResult is 0, and at least one of 2762d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // TrueResult and FalseResult is non-zero. 2763d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Exp->getCond()->EvaluateAsInt(Ctx) == 0) { 2764d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return FalseResult; 2765d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2766d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return TrueResult; 2767d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2768d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::CXXDefaultArgExprClass: 2769d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<CXXDefaultArgExpr>(E)->getExpr(), Ctx); 2770d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall case Expr::ChooseExprClass: { 2771d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return CheckICE(cast<ChooseExpr>(E)->getChosenSubExpr(Ctx), Ctx); 2772d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2773d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2774d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2775d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall // Silence a GCC warning 2776d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return ICEDiag(2, E->getLocStart()); 2777d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 2778d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall 2779d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCallbool Expr::isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 2780d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall SourceLocation *Loc, bool isEvaluated) const { 2781d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall ICEDiag d = CheckICE(this, Ctx); 2782d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (d.Val != 0) { 2783d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (Loc) *Loc = d.Loc; 2784d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return false; 2785d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall } 2786d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall EvalResult EvalResult; 2787d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall if (!Evaluate(EvalResult, Ctx)) 2788d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall llvm_unreachable("ICE cannot be evaluated!"); 2789d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(!EvalResult.HasSideEffects && "ICE with side effects!"); 2790d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall assert(EvalResult.Val.isInt() && "ICE that isn't integer!"); 2791d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall Result = EvalResult.Val.getInt(); 2792d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall return true; 2793d905f5ad540c415d1a21b4f8b7bd715bfb7bb920John McCall} 2794