Expr.cpp revision 5daf570d0ce027e18ed5f9d66e6b2a14a40b720d
15f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===--- Expr.cpp - Expression AST Node Implementation --------------------===// 25f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 35f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// The LLVM Compiler Infrastructure 45f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 50bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// This file is distributed under the University of Illinois Open Source 60bc735ffcfb223c0186419547abaa5c84482663eChris Lattner// License. See LICENSE.TXT for details. 75f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 85f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 95f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// This file implements the Expr class and subclasses. 115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// 125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 14c4a1dea2dc56bd1357ec91b829a0b9e68229a13eDaniel Dunbar#include "clang/AST/Expr.h" 15a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner#include "clang/AST/APValue.h" 162eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner#include "clang/AST/ASTContext.h" 17a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner#include "clang/AST/DeclObjC.h" 1898cd599ee8a9b259ed7388ee2921a20d97658864Douglas Gregor#include "clang/AST/DeclCXX.h" 19e91593ef084479340582b2ba177b44be50a717b7Daniel Dunbar#include "clang/AST/RecordLayout.h" 205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer#include "clang/AST/StmtVisitor.h" 21da5a6b6d9fd52899499d5b7b46273ec844dcaa6eChris Lattner#include "clang/Basic/TargetInfo.h" 225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerusing namespace clang; 235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Primary Expressions. 265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 28da8249e57f3badecf925571881fe57243935c6c1Chris Lattner/// getValueAsApproximateDouble - This returns the value as an inaccurate 29da8249e57f3badecf925571881fe57243935c6c1Chris Lattner/// double. Note that this may cause loss of precision, but is useful for 30da8249e57f3badecf925571881fe57243935c6c1Chris Lattner/// debugging dumps, etc. 31da8249e57f3badecf925571881fe57243935c6c1Chris Lattnerdouble FloatingLiteral::getValueAsApproximateDouble() const { 32da8249e57f3badecf925571881fe57243935c6c1Chris Lattner llvm::APFloat V = getValue(); 33ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen bool ignored; 34ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven, 35ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen &ignored); 36da8249e57f3badecf925571881fe57243935c6c1Chris Lattner return V.convertToDouble(); 37da8249e57f3badecf925571881fe57243935c6c1Chris Lattner} 38da8249e57f3badecf925571881fe57243935c6c1Chris Lattner 39da8249e57f3badecf925571881fe57243935c6c1Chris Lattner 405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerStringLiteral::StringLiteral(const char *strData, unsigned byteLength, 415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool Wide, QualType t, SourceLocation firstLoc, 425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation lastLoc) : 435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Expr(StringLiteralClass, t) { 445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // OPTIMIZE: could allocate this appended to the StringLiteral. 455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer char *AStrData = new char[byteLength]; 465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer memcpy(AStrData, strData, byteLength); 475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer StrData = AStrData; 485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer ByteLength = byteLength; 495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer IsWide = Wide; 505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer firstTokLoc = firstLoc; 515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer lastTokLoc = lastLoc; 525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerStringLiteral::~StringLiteral() { 555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer delete[] StrData; 565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool UnaryOperator::isPostfix(Opcode Op) { 595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Op) { 605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case PostInc: 615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case PostDec: 625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 685a56ac30d04e8f0431a08980885662a47a6308aaTed Kremenekbool UnaryOperator::isPrefix(Opcode Op) { 695a56ac30d04e8f0431a08980885662a47a6308aaTed Kremenek switch (Op) { 705a56ac30d04e8f0431a08980885662a47a6308aaTed Kremenek case PreInc: 715a56ac30d04e8f0431a08980885662a47a6308aaTed Kremenek case PreDec: 725a56ac30d04e8f0431a08980885662a47a6308aaTed Kremenek return true; 735a56ac30d04e8f0431a08980885662a47a6308aaTed Kremenek default: 745a56ac30d04e8f0431a08980885662a47a6308aaTed Kremenek return false; 755a56ac30d04e8f0431a08980885662a47a6308aaTed Kremenek } 765a56ac30d04e8f0431a08980885662a47a6308aaTed Kremenek} 775a56ac30d04e8f0431a08980885662a47a6308aaTed Kremenek 785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// corresponds to, e.g. "sizeof" or "[pre]++". 805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerconst char *UnaryOperator::getOpcodeStr(Opcode Op) { 815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Op) { 825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: assert(0 && "Unknown unary operator"); 835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case PostInc: return "++"; 845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case PostDec: return "--"; 855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case PreInc: return "++"; 865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case PreDec: return "--"; 875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case AddrOf: return "&"; 885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Deref: return "*"; 895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Plus: return "+"; 905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Minus: return "-"; 915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Not: return "~"; 925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LNot: return "!"; 935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Real: return "__real"; 945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Imag: return "__imag"; 955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Extension: return "__extension__"; 9673d0d4fac161ed12926e010dcf8b448a8de6a2ecChris Lattner case OffsetOf: return "__builtin_offsetof"; 975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Postfix Operators. 1025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 1035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 104b4609806e9232593ece09ce08b630836e825865cDouglas GregorCallExpr::CallExpr(StmtClass SC, Expr *fn, Expr **args, unsigned numargs, 105b4609806e9232593ece09ce08b630836e825865cDouglas Gregor QualType t, SourceLocation rparenloc) 106b4609806e9232593ece09ce08b630836e825865cDouglas Gregor : Expr(SC, t), NumArgs(numargs) { 107b4609806e9232593ece09ce08b630836e825865cDouglas Gregor SubExprs = new Stmt*[numargs+1]; 108b4609806e9232593ece09ce08b630836e825865cDouglas Gregor SubExprs[FN] = fn; 109b4609806e9232593ece09ce08b630836e825865cDouglas Gregor for (unsigned i = 0; i != numargs; ++i) 110b4609806e9232593ece09ce08b630836e825865cDouglas Gregor SubExprs[i+ARGS_START] = args[i]; 111b4609806e9232593ece09ce08b630836e825865cDouglas Gregor RParenLoc = rparenloc; 112b4609806e9232593ece09ce08b630836e825865cDouglas Gregor} 113e2ce1d9440186cf3332368291cd884a6e3ae8946Nate Begeman 1145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerCallExpr::CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t, 1155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation rparenloc) 11677ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek : Expr(CallExprClass, t), NumArgs(numargs) { 1175549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek SubExprs = new Stmt*[numargs+1]; 11877ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek SubExprs[FN] = fn; 1195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; i != numargs; ++i) 12077ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek SubExprs[i+ARGS_START] = args[i]; 1215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer RParenLoc = rparenloc; 1225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 124d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner/// setNumArgs - This changes the number of arguments present in this call. 125d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner/// Any orphaned expressions are deleted by this, and any new operands are set 126d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner/// to null. 127d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattnervoid CallExpr::setNumArgs(unsigned NumArgs) { 128d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner // No change, just return. 129d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner if (NumArgs == getNumArgs()) return; 130d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner 131d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner // If shrinking # arguments, just delete the extras and forgot them. 132d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner if (NumArgs < getNumArgs()) { 133d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner for (unsigned i = NumArgs, e = getNumArgs(); i != e; ++i) 134d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner delete getArg(i); 135d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner this->NumArgs = NumArgs; 136d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner return; 137d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner } 138d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner 139d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner // Otherwise, we are growing the # arguments. New an bigger argument array. 1405549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek Stmt **NewSubExprs = new Stmt*[NumArgs+1]; 141d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner // Copy over args. 142d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner for (unsigned i = 0; i != getNumArgs()+ARGS_START; ++i) 143d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner NewSubExprs[i] = SubExprs[i]; 144d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner // Null out new args. 145d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner for (unsigned i = getNumArgs()+ARGS_START; i != NumArgs+ARGS_START; ++i) 146d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner NewSubExprs[i] = 0; 147d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner 148d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner delete[] SubExprs; 149d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner SubExprs = NewSubExprs; 150d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner this->NumArgs = NumArgs; 151d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner} 152d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner 153cb888967400a03504c88acedd5248d6778a82f46Chris Lattner/// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If 154cb888967400a03504c88acedd5248d6778a82f46Chris Lattner/// not, return 0. 155cb888967400a03504c88acedd5248d6778a82f46Chris Lattnerunsigned CallExpr::isBuiltinCall() const { 156c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff // All simple function calls (e.g. func()) are implicitly cast to pointer to 157c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff // function. As a result, we try and obtain the DeclRefExpr from the 158c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff // ImplicitCastExpr. 159c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee()); 160c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()). 161cb888967400a03504c88acedd5248d6778a82f46Chris Lattner return 0; 162cb888967400a03504c88acedd5248d6778a82f46Chris Lattner 163c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr()); 164c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff if (!DRE) 165cb888967400a03504c88acedd5248d6778a82f46Chris Lattner return 0; 166cb888967400a03504c88acedd5248d6778a82f46Chris Lattner 167bcba201a1118d7852b8b97187d495ae2a4f49519Anders Carlsson const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl()); 168bcba201a1118d7852b8b97187d495ae2a4f49519Anders Carlsson if (!FDecl) 169cb888967400a03504c88acedd5248d6778a82f46Chris Lattner return 0; 170cb888967400a03504c88acedd5248d6778a82f46Chris Lattner 1714fcd399a52ae45ed8ebfdd3a25e01cfb76fa366dDouglas Gregor if (!FDecl->getIdentifier()) 1724fcd399a52ae45ed8ebfdd3a25e01cfb76fa366dDouglas Gregor return 0; 1734fcd399a52ae45ed8ebfdd3a25e01cfb76fa366dDouglas Gregor 174cb888967400a03504c88acedd5248d6778a82f46Chris Lattner return FDecl->getIdentifier()->getBuiltinID(); 175cb888967400a03504c88acedd5248d6778a82f46Chris Lattner} 176bcba201a1118d7852b8b97187d495ae2a4f49519Anders Carlsson 177cb888967400a03504c88acedd5248d6778a82f46Chris Lattner 1785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 1795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// corresponds to, e.g. "<<=". 1805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerconst char *BinaryOperator::getOpcodeStr(Opcode Op) { 1815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Op) { 1825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: assert(0 && "Unknown binary operator"); 1835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Mul: return "*"; 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Div: return "/"; 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Rem: return "%"; 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Add: return "+"; 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Sub: return "-"; 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Shl: return "<<"; 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Shr: return ">>"; 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LT: return "<"; 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case GT: return ">"; 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LE: return "<="; 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case GE: return ">="; 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case EQ: return "=="; 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case NE: return "!="; 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case And: return "&"; 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Xor: return "^"; 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Or: return "|"; 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LAnd: return "&&"; 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LOr: return "||"; 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Assign: return "="; 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case MulAssign: return "*="; 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DivAssign: return "/="; 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case RemAssign: return "%="; 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case AddAssign: return "+="; 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case SubAssign: return "-="; 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ShlAssign: return "<<="; 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ShrAssign: return ">>="; 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case AndAssign: return "&="; 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case XorAssign: return "^="; 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case OrAssign: return "|="; 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Comma: return ","; 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 21666b5a8a39088598c01a9fa6f032dc908612dc8ecAnders CarlssonInitListExpr::InitListExpr(SourceLocation lbraceloc, 217418f6c7d142e5ff4607f70cd8431d008442bafe9Chris Lattner Expr **initExprs, unsigned numInits, 218418f6c7d142e5ff4607f70cd8431d008442bafe9Chris Lattner SourceLocation rbraceloc, bool hadDesignators) 219c5ae899b4bbf65488445316c63168079177db0edSteve Naroff : Expr(InitListExprClass, QualType()), 220418f6c7d142e5ff4607f70cd8431d008442bafe9Chris Lattner LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), HadDesignators(hadDesignators) { 221418f6c7d142e5ff4607f70cd8431d008442bafe9Chris Lattner 222418f6c7d142e5ff4607f70cd8431d008442bafe9Chris Lattner InitExprs.insert(InitExprs.end(), initExprs, initExprs+numInits); 22366b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson} 2245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 225bfdcae678d44906293e21c0cddc6537f3ee8b5a4Steve Naroff/// getFunctionType - Return the underlying function type for this block. 2264eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 2274eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroffconst FunctionType *BlockExpr::getFunctionType() const { 2284eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return getType()->getAsBlockPointerType()-> 2294eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff getPointeeType()->getAsFunctionType(); 2304eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 2314eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 23256ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve NaroffSourceLocation BlockExpr::getCaretLocation() const { 23356ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve Naroff return TheBlock->getCaretLocation(); 23456ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve Naroff} 23556ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve Naroffconst Stmt *BlockExpr::getBody() const { return TheBlock->getBody(); } 23656ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve NaroffStmt *BlockExpr::getBody() { return TheBlock->getBody(); } 23756ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve Naroff 23856ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve Naroff 2395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Generic Expression Routines 2415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hasLocalSideEffect - Return true if this immediate expression has side 2445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// effects, not counting any sub-expressions. 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Expr::hasLocalSideEffect() const { 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (getStmtClass()) { 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ParenExprClass: 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return cast<ParenExpr>(this)->getSubExpr()->hasLocalSideEffect(); 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperatorClass: { 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const UnaryOperator *UO = cast<UnaryOperator>(this); 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (UO->getOpcode()) { 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: return false; 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::PostInc: 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::PostDec: 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::PreInc: 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::PreDec: 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; // ++/-- 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Deref: 2635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Dereferencing a volatile pointer is a side-effect. 2645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return getType().isVolatileQualified(); 2655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Real: 2665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Imag: 2675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // accessing a piece of a volatile complex is a side-effect. 2685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return UO->getSubExpr()->getType().isVolatileQualified(); 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Extension: 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return UO->getSubExpr()->hasLocalSideEffect(); 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 274e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner case BinaryOperatorClass: { 275e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner const BinaryOperator *BinOp = cast<BinaryOperator>(this); 276e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner // Consider comma to have side effects if the LHS and RHS both do. 277e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner if (BinOp->getOpcode() == BinaryOperator::Comma) 278e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner return BinOp->getLHS()->hasLocalSideEffect() && 279e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner BinOp->getRHS()->hasLocalSideEffect(); 280e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner 281e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner return BinOp->isAssignmentOp(); 282e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner } 283eb14fe839ec24c2ca14e5f094be147a34e3d3339Chris Lattner case CompoundAssignOperatorClass: 2841f683e9cf2e855b32d3fb4b142aa121cd3cf1088Chris Lattner return true; 2855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 286ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian case ConditionalOperatorClass: { 287ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian const ConditionalOperator *Exp = cast<ConditionalOperator>(this); 288ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian return Exp->getCond()->hasLocalSideEffect() 289ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian || (Exp->getLHS() && Exp->getLHS()->hasLocalSideEffect()) 290ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian || (Exp->getRHS() && Exp->getRHS()->hasLocalSideEffect()); 291ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian } 292ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian 2935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case MemberExprClass: 2945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ArraySubscriptExprClass: 2955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the base pointer or element is to a volatile pointer/field, accessing 2965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // if is a side effect. 2975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return getType().isVolatileQualified(); 298211f6adf1301a1461015fb6cb08a05f0a35b65f3Eli Friedman 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case CallExprClass: 300b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CXXOperatorCallExprClass: 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: check attributes for pure/const. "void foo() { strlen("bar"); }" 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // should warn. 3035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 304a9c01021724b9b546d282b8609cbe559734812ecChris Lattner case ObjCMessageExprClass: 305a9c01021724b9b546d282b8609cbe559734812ecChris Lattner return true; 306611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner case StmtExprClass: { 307611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner // Statement exprs don't logically have side effects themselves, but are 308611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner // sometimes used in macros in ways that give them a type that is unused. 309611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner // For example ({ blah; foo(); }) will end up with a type if foo has a type. 310611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner // however, if the result of the stmt expr is dead, we don't want to emit a 311611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner // warning. 312611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt(); 313611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner if (!CS->body_empty()) 314611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner if (const Expr *E = dyn_cast<Expr>(CS->body_back())) 315611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner return E->hasLocalSideEffect(); 316611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner return false; 317611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner } 3186eec8e883de118b431e3ead5b1e604a6ac68ff6bDouglas Gregor case CStyleCastExprClass: 319987a14bf5883ef6e5d07f1c83eb6d41a8212a78cArgyrios Kyrtzidis case CXXFunctionalCastExprClass: 3205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a cast to void, check the operand. Otherwise, the result of 3215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the cast is unused. 3225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (getType()->isVoidType()) 3235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return cast<CastExpr>(this)->getSubExpr()->hasLocalSideEffect(); 3245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 32504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 3264be1f47de20525ad90f02ba8682a7e2cbd3205d1Eli Friedman case ImplicitCastExprClass: 3274be1f47de20525ad90f02ba8682a7e2cbd3205d1Eli Friedman // Check the operand, since implicit casts are inserted by Sema 3284be1f47de20525ad90f02ba8682a7e2cbd3205d1Eli Friedman return cast<ImplicitCastExpr>(this)->getSubExpr()->hasLocalSideEffect(); 3294be1f47de20525ad90f02ba8682a7e2cbd3205d1Eli Friedman 33004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 33104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return cast<CXXDefaultArgExpr>(this)->getExpr()->hasLocalSideEffect(); 3324c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl 3334c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl case CXXNewExprClass: 3344c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl // FIXME: In theory, there might be new expressions that don't have side 3354c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl // effects (e.g. a placement new with an uninitialized POD). 3364c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl case CXXDeleteExprClass: 3374c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl return true; 3384c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl } 3395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 341ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor/// DeclCanBeLvalue - Determine whether the given declaration can be 342ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor/// an lvalue. This is a helper routine for isLvalue. 343ba7e210a999275695f58be03ef402758cfec3635Douglas Gregorstatic bool DeclCanBeLvalue(const NamedDecl *Decl, ASTContext &Ctx) { 34490b7bc67518a408d397f2400ff6c40e5465b45e4Argyrios Kyrtzidis return isa<VarDecl>(Decl) || isa<CXXFieldDecl>(Decl) || 345ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor // C++ 3.10p2: An lvalue refers to an object or function. 346ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor (Ctx.getLangOptions().CPlusPlus && 347ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor (isa<FunctionDecl>(Decl) || isa<OverloadedFunctionDecl>(Decl))); 348ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor} 349ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor 3505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or an 3515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// incomplete type other than void. Nonarray expressions that can be lvalues: 3525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - name, where name must be a variable 3535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - e[i] 3545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - (e), where e must be an lvalue 3555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - e.name, where e must be an lvalue 3565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - e->name 3575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - *e, the type of e cannot be a function type 3585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - string-constant 3597da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner/// - (__real__ e) and (__imag__ e) where e is an lvalue [GNU extension] 36008ad47cbd1f81fcb31dbc731c13b885a07e12704Bill Wendling/// - reference type [C++ [expr]] 3615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 36228be73f74c9e241a23ea24fe5756623de6bf1084Chris LattnerExpr::isLvalueResult Expr::isLvalue(ASTContext &Ctx) const { 36398cd599ee8a9b259ed7388ee2921a20d97658864Douglas Gregor // first, check the type (C99 6.3.2.1). Expressions with function 36498cd599ee8a9b259ed7388ee2921a20d97658864Douglas Gregor // type in C are not lvalues, but they can be lvalues in C++. 36598cd599ee8a9b259ed7388ee2921a20d97658864Douglas Gregor if (!Ctx.getLangOptions().CPlusPlus && TR->isFunctionType()) 3665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return LV_NotObjectType; 3675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 368acb818a4f7d9b608826171094d6b5a555a8fe694Steve Naroff // Allow qualified void which is an incomplete type other than void (yuck). 36928be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner if (TR->isVoidType() && !Ctx.getCanonicalType(TR).getCVRQualifiers()) 370acb818a4f7d9b608826171094d6b5a555a8fe694Steve Naroff return LV_IncompleteVoidType; 371acb818a4f7d9b608826171094d6b5a555a8fe694Steve Naroff 37298cd599ee8a9b259ed7388ee2921a20d97658864Douglas Gregor /// FIXME: Expressions can't have reference type, so the following 37398cd599ee8a9b259ed7388ee2921a20d97658864Douglas Gregor /// isn't needed. 374cb4f9a6d0be445d84af35ba81323be6127816f9eChris Lattner if (TR->isReferenceType()) // C++ [expr] 37508ad47cbd1f81fcb31dbc731c13b885a07e12704Bill Wendling return LV_Valid; 37608ad47cbd1f81fcb31dbc731c13b885a07e12704Bill Wendling 3775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the type looks fine, now check the expression 3785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (getStmtClass()) { 3795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case StringLiteralClass: // C99 6.5.1p4 3807323a6297edad643c202594dcf3d9a174de96ca6Anders Carlsson return LV_Valid; 3815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ArraySubscriptExprClass: // C99 6.5.3p4 (e1[e2] == (*((e1)+(e2)))) 3825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // For vectors, make sure base is an lvalue (i.e. not a function call). 3835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (cast<ArraySubscriptExpr>(this)->getBase()->getType()->isVectorType()) 38428be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return cast<ArraySubscriptExpr>(this)->getBase()->isLvalue(Ctx); 3855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return LV_Valid; 3864111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner case DeclRefExprClass: { // C99 6.5.1p2 387ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor const NamedDecl *RefdDecl = cast<DeclRefExpr>(this)->getDecl(); 388ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor if (DeclCanBeLvalue(RefdDecl, Ctx)) 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return LV_Valid; 3905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 3914111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner } 392dd972f20dc2bd3609d833893e5c6544ac09b59a9Steve Naroff case BlockDeclRefExprClass: { 393dd972f20dc2bd3609d833893e5c6544ac09b59a9Steve Naroff const BlockDeclRefExpr *BDR = cast<BlockDeclRefExpr>(this); 3944f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff if (isa<VarDecl>(BDR->getDecl())) 395dd972f20dc2bd3609d833893e5c6544ac09b59a9Steve Naroff return LV_Valid; 396dd972f20dc2bd3609d833893e5c6544ac09b59a9Steve Naroff break; 397dd972f20dc2bd3609d833893e5c6544ac09b59a9Steve Naroff } 398fdd75663fffeb2058a7847975e50837e61200593Anton Korobeynikov case MemberExprClass: { // C99 6.5.2.3p4 3995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const MemberExpr *m = cast<MemberExpr>(this); 40028be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return m->isArrow() ? LV_Valid : m->getBase()->isLvalue(Ctx); 401fdd75663fffeb2058a7847975e50837e61200593Anton Korobeynikov } 4027da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner case UnaryOperatorClass: 4035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Deref) 4047da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner return LV_Valid; // C99 6.5.3p4 4057da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner 4067da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Real || 407baf0d6678418e0dd9309438c3e50274253cfc7b2Chris Lattner cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Imag || 408baf0d6678418e0dd9309438c3e50274253cfc7b2Chris Lattner cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Extension) 40928be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return cast<UnaryOperator>(this)->getSubExpr()->isLvalue(Ctx); // GNU. 41074253736184c0717a0649922551bf9d8b6815651Douglas Gregor 41174253736184c0717a0649922551bf9d8b6815651Douglas Gregor if (Ctx.getLangOptions().CPlusPlus && // C++ [expr.pre.incr]p1 41274253736184c0717a0649922551bf9d8b6815651Douglas Gregor (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::PreInc || 41374253736184c0717a0649922551bf9d8b6815651Douglas Gregor cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::PreDec)) 41474253736184c0717a0649922551bf9d8b6815651Douglas Gregor return LV_Valid; 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 416eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor case ImplicitCastExprClass: 417eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor return cast<ImplicitCastExpr>(this)->isLvalueCast()? LV_Valid 418eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor : LV_InvalidExpression; 4195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ParenExprClass: // C99 6.5.1p5 42028be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return cast<ParenExpr>(this)->getSubExpr()->isLvalue(Ctx); 421eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor case BinaryOperatorClass: 422eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor case CompoundAssignOperatorClass: { 423eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor const BinaryOperator *BinOp = cast<BinaryOperator>(this); 424337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor 425337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor if (Ctx.getLangOptions().CPlusPlus && // C++ [expr.comma]p1 426337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor BinOp->getOpcode() == BinaryOperator::Comma) 427337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor return BinOp->getRHS()->isLvalue(Ctx); 428337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor 429bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor if (!BinOp->isAssignmentOp()) 430eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor return LV_InvalidExpression; 431eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor 432bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor if (Ctx.getLangOptions().CPlusPlus) 433bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // C++ [expr.ass]p1: 434bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // The result of an assignment operation [...] is an lvalue. 435bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor return LV_Valid; 436bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor 437bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor 438bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // C99 6.5.16: 439bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // An assignment expression [...] is not an lvalue. 440bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor return LV_InvalidExpression; 441eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor } 442b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CallExprClass: 443b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CXXOperatorCallExprClass: { 4449d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // C++ [expr.call]p10: 4459d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // A function call is an lvalue if and only if the result type 4469d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // is a reference. 44727c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor QualType CalleeType = cast<CallExpr>(this)->getCallee()->getType(); 4489d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor if (const PointerType *FnTypePtr = CalleeType->getAsPointerType()) 4499d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor if (const FunctionType *FnType 4509d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor = FnTypePtr->getPointeeType()->getAsFunctionType()) 4519d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor if (FnType->getResultType()->isReferenceType()) 4529d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor return LV_Valid; 4539d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor 4549d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor break; 4559d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor } 456e6386394677ed4f77b20e2e3d5446a3a2f628e53Steve Naroff case CompoundLiteralExprClass: // C99 6.5.2.5p5 457e6386394677ed4f77b20e2e3d5446a3a2f628e53Steve Naroff return LV_Valid; 458213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman case ExtVectorElementExprClass: 459213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman if (cast<ExtVectorElementExpr>(this)->containsDuplicateElements()) 460fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return LV_DuplicateVectorComponents; 461fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return LV_Valid; 462027282d1c1ac151aa7b1b3b45babc918b8ad456aSteve Naroff case ObjCIvarRefExprClass: // ObjC instance variables are lvalues. 463027282d1c1ac151aa7b1b3b45babc918b8ad456aSteve Naroff return LV_Valid; 464799a6a6850af625946bb8d88ca960bb6604e3858Steve Naroff case ObjCPropertyRefExprClass: // FIXME: check if read-only property. 465799a6a6850af625946bb8d88ca960bb6604e3858Steve Naroff return LV_Valid; 4665daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian case ObjCKVCRefExprClass: // FIXME: check if read-only property. 4675daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian return LV_Valid; 468d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris Lattner case PredefinedExprClass: 469796da18402f286b897782a298ae3b20c459c102eDouglas Gregor return LV_Valid; 4709d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case VAArgExprClass: 4719d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor return LV_Valid; 47204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 47328be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return cast<CXXDefaultArgExpr>(this)->getExpr()->isLvalue(Ctx); 47424b41fa8239c63b9eb570d3e83c4a82840656a65Argyrios Kyrtzidis case CXXConditionDeclExprClass: 47524b41fa8239c63b9eb570d3e83c4a82840656a65Argyrios Kyrtzidis return LV_Valid; 4766eec8e883de118b431e3ead5b1e604a6ac68ff6bDouglas Gregor case CStyleCastExprClass: 4779d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXFunctionalCastExprClass: 4789d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXStaticCastExprClass: 4799d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXDynamicCastExprClass: 4809d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXReinterpretCastExprClass: 4819d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXConstCastExprClass: 4829d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // The result of an explicit cast is an lvalue if the type we are 4839d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // casting to is a reference type. See C++ [expr.cast]p1, 4849d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // C++ [expr.static.cast]p2, C++ [expr.dynamic.cast]p2, 4859d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // C++ [expr.reinterpret.cast]p1, C++ [expr.const.cast]p1. 4869d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor if (cast<ExplicitCastExpr>(this)->getTypeAsWritten()->isReferenceType()) 4879d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor return LV_Valid; 4889d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor break; 489c42e1183846228a7fa5143ad76507d6d60f5c6f3Sebastian Redl case CXXTypeidExprClass: 490c42e1183846228a7fa5143ad76507d6d60f5c6f3Sebastian Redl // C++ 5.2.8p1: The result of a typeid expression is an lvalue of ... 491c42e1183846228a7fa5143ad76507d6d60f5c6f3Sebastian Redl return LV_Valid; 4925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 4935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 4945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 4955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return LV_InvalidExpression; 4965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 4975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 4985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, 4995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// does not have an incomplete type, does not have a const-qualified type, and 5005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// if it is a structure or union, does not have any member (including, 5015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// recursively, any member or element of all contained aggregates or unions) 5025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// with a const-qualified type. 50328be73f74c9e241a23ea24fe5756623de6bf1084Chris LattnerExpr::isModifiableLvalueResult Expr::isModifiableLvalue(ASTContext &Ctx) const { 50428be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner isLvalueResult lvalResult = isLvalue(Ctx); 5055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (lvalResult) { 507ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor case LV_Valid: 508ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor // C++ 3.10p11: Functions cannot be modified, but pointers to 509ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor // functions can be modifiable. 510ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor if (Ctx.getLangOptions().CPlusPlus && TR->isFunctionType()) 511ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor return MLV_NotObjectType; 512ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor break; 513ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LV_NotObjectType: return MLV_NotObjectType; 5155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LV_IncompleteVoidType: return MLV_IncompleteVoidType; 516fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff case LV_DuplicateVectorComponents: return MLV_DuplicateVectorComponents; 517ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner case LV_InvalidExpression: 518ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // If the top level is a C-style cast, and the subexpression is a valid 519ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // lvalue, then this is probably a use of the old-school "cast as lvalue" 520ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // GCC extension. We don't support it, but we want to produce good 521ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // diagnostics when it happens so that the user knows why. 522ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner if (const CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(this)) 523ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner if (CE->getSubExpr()->isLvalue(Ctx) == LV_Valid) 524ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner return MLV_LValueCast; 525ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner return MLV_InvalidExpression; 5265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 527c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner 528c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType CT = Ctx.getCanonicalType(getType()); 529c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner 530c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (CT.isConstQualified()) 5315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_ConstQualified; 532c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (CT->isArrayType()) 5335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_ArrayType; 534c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (CT->isIncompleteType()) 5355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_IncompleteType; 5365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 537c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (const RecordType *r = CT->getAsRecordType()) { 5385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (r->hasConstFields()) 5395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_ConstQualified; 5405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5414f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // The following is illegal: 5424f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // void takeclosure(void (^C)(void)); 5434f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // void func() { int x = 1; takeclosure(^{ x = 7 }); } 5444f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // 5454f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff if (getStmtClass() == BlockDeclRefExprClass) { 5464f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff const BlockDeclRefExpr *BDR = cast<BlockDeclRefExpr>(this); 5474f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff if (!BDR->isByRef() && isa<VarDecl>(BDR->getDecl())) 5484f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff return MLV_NotBlockQualified; 5494f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff } 5505daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian // Assigning to a readonly property? 5515daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian if (getStmtClass() == ObjCPropertyRefExprClass) { 5525daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian const ObjCPropertyRefExpr* PropExpr = cast<ObjCPropertyRefExpr>(this); 5535daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian if (ObjCPropertyDecl *PDecl = PropExpr->getProperty()) { 5545daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian ObjCPropertyDecl::PropertyAttributeKind Pkind = 5555daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian PDecl->getPropertyAttributes(); 5565daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian if (Pkind == ObjCPropertyDecl::OBJC_PR_readonly) 5575daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian return MLV_ReadonlyProperty; 5585daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian } 5595daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian } 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_Valid; 5615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5632e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek/// hasGlobalStorage - Return true if this expression has static storage 5644cc627111453b75519d5130b57e06256da7b00e8Chris Lattner/// duration. This means that the address of this expression is a link-time 5654cc627111453b75519d5130b57e06256da7b00e8Chris Lattner/// constant. 5662e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenekbool Expr::hasGlobalStorage() const { 5671d09ecca892185ba067e47ba879f424de59950efChris Lattner switch (getStmtClass()) { 5681d09ecca892185ba067e47ba879f424de59950efChris Lattner default: 5691d09ecca892185ba067e47ba879f424de59950efChris Lattner return false; 5704cc627111453b75519d5130b57e06256da7b00e8Chris Lattner case ParenExprClass: 5712e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return cast<ParenExpr>(this)->getSubExpr()->hasGlobalStorage(); 5724cc627111453b75519d5130b57e06256da7b00e8Chris Lattner case ImplicitCastExprClass: 5732e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return cast<ImplicitCastExpr>(this)->getSubExpr()->hasGlobalStorage(); 574e9b12198c4cc7f5687960100351b4af006c14469Steve Naroff case CompoundLiteralExprClass: 575e9b12198c4cc7f5687960100351b4af006c14469Steve Naroff return cast<CompoundLiteralExpr>(this)->isFileScope(); 5761d09ecca892185ba067e47ba879f424de59950efChris Lattner case DeclRefExprClass: { 5771d09ecca892185ba067e47ba879f424de59950efChris Lattner const Decl *D = cast<DeclRefExpr>(this)->getDecl(); 5781d09ecca892185ba067e47ba879f424de59950efChris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 5792e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return VD->hasGlobalStorage(); 58063f067f5a75ae97b53dc7a6a6530e2c72c8bb7f8Seo Sanghyeon if (isa<FunctionDecl>(D)) 58163f067f5a75ae97b53dc7a6a6530e2c72c8bb7f8Seo Sanghyeon return true; 5821d09ecca892185ba067e47ba879f424de59950efChris Lattner return false; 5831d09ecca892185ba067e47ba879f424de59950efChris Lattner } 584fb7080663a0f0abd687a6f58ac917d9a76318b73Chris Lattner case MemberExprClass: { 5851d09ecca892185ba067e47ba879f424de59950efChris Lattner const MemberExpr *M = cast<MemberExpr>(this); 5862e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return !M->isArrow() && M->getBase()->hasGlobalStorage(); 587fb7080663a0f0abd687a6f58ac917d9a76318b73Chris Lattner } 5884cc627111453b75519d5130b57e06256da7b00e8Chris Lattner case ArraySubscriptExprClass: 5892e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return cast<ArraySubscriptExpr>(this)->getBase()->hasGlobalStorage(); 590d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris Lattner case PredefinedExprClass: 591fa28b30d5a1e93e5263be33e343532b900d2c643Chris Lattner return true; 59204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 59304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return cast<CXXDefaultArgExpr>(this)->getExpr()->hasGlobalStorage(); 5941d09ecca892185ba067e47ba879f424de59950efChris Lattner } 5951d09ecca892185ba067e47ba879f424de59950efChris Lattner} 5961d09ecca892185ba067e47ba879f424de59950efChris Lattner 5974e99a5fc3b203397a91136c6e695e405fb8fc606Ted KremenekExpr* Expr::IgnoreParens() { 5984e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek Expr* E = this; 5994e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek while (ParenExpr* P = dyn_cast<ParenExpr>(E)) 6004e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek E = P->getSubExpr(); 6014e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek 6024e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek return E; 6034e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek} 6044e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek 60556f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner/// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr 60656f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner/// or CastExprs or ImplicitCastExprs, returning their operand. 60756f349400c5932a196509c0480ff6f99a9a0b48fChris LattnerExpr *Expr::IgnoreParenCasts() { 60856f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner Expr *E = this; 60956f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner while (true) { 61056f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner if (ParenExpr *P = dyn_cast<ParenExpr>(E)) 61156f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner E = P->getSubExpr(); 61256f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner else if (CastExpr *P = dyn_cast<CastExpr>(E)) 61356f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner E = P->getSubExpr(); 61456f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner else 61556f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner return E; 61656f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner } 61756f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner} 61856f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner 61956f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner 62038374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroffbool Expr::isConstantExpr(ASTContext &Ctx, SourceLocation *Loc) const { 62138374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff switch (getStmtClass()) { 62238374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff default: 62338374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff if (Loc) *Loc = getLocStart(); 62438374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return false; 62538374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case ParenExprClass: 62638374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return cast<ParenExpr>(this)->getSubExpr()->isConstantExpr(Ctx, Loc); 62738374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case StringLiteralClass: 6285d37e32a5bfefacdd7b4d0664199d72c703d489dSteve Naroff case ObjCStringLiteralClass: 62938374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case FloatingLiteralClass: 63038374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case IntegerLiteralClass: 63138374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case CharacterLiteralClass: 63238374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case ImaginaryLiteralClass: 6331a86b33c1870fee08d281c9f07ac1280195a7faeAnders Carlsson case TypesCompatibleExprClass: 6341a86b33c1870fee08d281c9f07ac1280195a7faeAnders Carlsson case CXXBoolLiteralExprClass: 63515425f9d2d92e2a5f99b09b8e2fc00025631e593Anders Carlsson case AddrLabelExprClass: 6362777e494c96bee69141a10a0174d5da16e7b927bChris Lattner return true; 637b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CallExprClass: 638b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CXXOperatorCallExprClass: { 63938374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff const CallExpr *CE = cast<CallExpr>(this); 64045b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner 64145b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner // Allow any constant foldable calls to builtins. 64245b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner if (CE->isBuiltinCall() && CE->isEvaluatable(Ctx)) 643c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff return true; 64445b6b9d080ac56917337d73d8f1cd6374b27b05dChris Lattner 64538374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff if (Loc) *Loc = getLocStart(); 64638374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return false; 64738374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff } 6484ef8dd6e8736097bf9e3c387139c668565d89dcaChris Lattner case DeclRefExprClass: { 6494ef8dd6e8736097bf9e3c387139c668565d89dcaChris Lattner const Decl *D = cast<DeclRefExpr>(this)->getDecl(); 6504ef8dd6e8736097bf9e3c387139c668565d89dcaChris Lattner // Accept address of function. 6514ef8dd6e8736097bf9e3c387139c668565d89dcaChris Lattner if (isa<EnumConstantDecl>(D) || isa<FunctionDecl>(D)) 6522777e494c96bee69141a10a0174d5da16e7b927bChris Lattner return true; 65338374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff if (Loc) *Loc = getLocStart(); 6541d09ecca892185ba067e47ba879f424de59950efChris Lattner if (isa<VarDecl>(D)) 6551d09ecca892185ba067e47ba879f424de59950efChris Lattner return TR->isArrayType(); 65638374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return false; 6574ef8dd6e8736097bf9e3c387139c668565d89dcaChris Lattner } 658b8f13a8baff3df080fe024fec47746e9a79fe649Steve Naroff case CompoundLiteralExprClass: 659b8f13a8baff3df080fe024fec47746e9a79fe649Steve Naroff if (Loc) *Loc = getLocStart(); 660b8f13a8baff3df080fe024fec47746e9a79fe649Steve Naroff // Allow "(int []){2,4}", since the array will be converted to a pointer. 661d47d4f518e43eaa716e2d18359bd725a03b87f58Nate Begeman // Allow "(vector type){2,4}" since the elements are all constant. 662d47d4f518e43eaa716e2d18359bd725a03b87f58Nate Begeman return TR->isArrayType() || TR->isVectorType(); 66338374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case UnaryOperatorClass: { 66438374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff const UnaryOperator *Exp = cast<UnaryOperator>(this); 66538374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff 6661d09ecca892185ba067e47ba879f424de59950efChris Lattner // C99 6.6p9 667239c15e5b07a6cc84278ede87edf638922767520Chris Lattner if (Exp->getOpcode() == UnaryOperator::AddrOf) { 6682e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek if (!Exp->getSubExpr()->hasGlobalStorage()) { 669239c15e5b07a6cc84278ede87edf638922767520Chris Lattner if (Loc) *Loc = getLocStart(); 670239c15e5b07a6cc84278ede87edf638922767520Chris Lattner return false; 671239c15e5b07a6cc84278ede87edf638922767520Chris Lattner } 672239c15e5b07a6cc84278ede87edf638922767520Chris Lattner return true; 673239c15e5b07a6cc84278ede87edf638922767520Chris Lattner } 6741d09ecca892185ba067e47ba879f424de59950efChris Lattner 67538374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff // Get the operand value. If this is sizeof/alignof, do not evalute the 67638374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff // operand. This affects C99 6.6p3. 6770518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (Exp->getOpcode() != UnaryOperator::OffsetOf && 67838374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff !Exp->getSubExpr()->isConstantExpr(Ctx, Loc)) 67938374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return false; 68038374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff 68138374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff switch (Exp->getOpcode()) { 68238374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 68338374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff // See C99 6.6p3. 68438374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff default: 68538374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff if (Loc) *Loc = Exp->getOperatorLoc(); 68638374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return false; 68738374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case UnaryOperator::Extension: 68838374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return true; // FIXME: this is wrong. 689d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff case UnaryOperator::OffsetOf: 6903c2b3170041f69a92904e3bab9b6d654eaf260acEli Friedman if (!Exp->getSubExpr()->getType()->isConstantSizeType()) { 69165383479cb2caf0f136f58fecdbdbaf9c497b7a1Chris Lattner if (Loc) *Loc = Exp->getOperatorLoc(); 69238374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return false; 69365383479cb2caf0f136f58fecdbdbaf9c497b7a1Chris Lattner } 6942777e494c96bee69141a10a0174d5da16e7b927bChris Lattner return true; 69538374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case UnaryOperator::LNot: 69638374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case UnaryOperator::Plus: 69738374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case UnaryOperator::Minus: 69838374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case UnaryOperator::Not: 6992777e494c96bee69141a10a0174d5da16e7b927bChris Lattner return true; 70038374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff } 70138374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff } 7020518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl case SizeOfAlignOfExprClass: { 7030518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl const SizeOfAlignOfExpr *Exp = cast<SizeOfAlignOfExpr>(this); 70438374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff // alignof always evaluates to a constant. 7050518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (Exp->isSizeOf()) { 7060518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType ArgTy = Exp->getTypeOfArgument(); 7070518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (!ArgTy->isVoidType() && !ArgTy->isConstantSizeType()) { 7080518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (Loc) *Loc = Exp->getOperatorLoc(); 7090518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return false; 7100518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl } 71165383479cb2caf0f136f58fecdbdbaf9c497b7a1Chris Lattner } 7122777e494c96bee69141a10a0174d5da16e7b927bChris Lattner return true; 71338374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff } 71438374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case BinaryOperatorClass: { 71538374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff const BinaryOperator *Exp = cast<BinaryOperator>(this); 71638374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff 71738374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff // The LHS of a constant expr is always evaluated and needed. 71838374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff if (!Exp->getLHS()->isConstantExpr(Ctx, Loc)) 71938374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return false; 72038374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff 72138374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff if (!Exp->getRHS()->isConstantExpr(Ctx, Loc)) 72238374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return false; 7232777e494c96bee69141a10a0174d5da16e7b927bChris Lattner return true; 72438374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff } 72538374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case ImplicitCastExprClass: 7266eec8e883de118b431e3ead5b1e604a6ac68ff6bDouglas Gregor case CStyleCastExprClass: 727987a14bf5883ef6e5d07f1c83eb6d41a8212a78cArgyrios Kyrtzidis case CXXFunctionalCastExprClass: { 7280835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis const Expr *SubExpr = cast<CastExpr>(this)->getSubExpr(); 7290835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis SourceLocation CastLoc = getLocStart(); 73038374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff if (!SubExpr->isConstantExpr(Ctx, Loc)) { 73138374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff if (Loc) *Loc = SubExpr->getLocStart(); 73238374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return false; 73338374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff } 7342777e494c96bee69141a10a0174d5da16e7b927bChris Lattner return true; 73538374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff } 73638374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff case ConditionalOperatorClass: { 73738374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff const ConditionalOperator *Exp = cast<ConditionalOperator>(this); 7382777e494c96bee69141a10a0174d5da16e7b927bChris Lattner if (!Exp->getCond()->isConstantExpr(Ctx, Loc) || 7393907323dd6665c0c4e383435cb145233f4533406Anders Carlsson // Handle the GNU extension for missing LHS. 7403907323dd6665c0c4e383435cb145233f4533406Anders Carlsson !(Exp->getLHS() && Exp->getLHS()->isConstantExpr(Ctx, Loc)) || 7412777e494c96bee69141a10a0174d5da16e7b927bChris Lattner !Exp->getRHS()->isConstantExpr(Ctx, Loc)) 74238374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff return false; 7432777e494c96bee69141a10a0174d5da16e7b927bChris Lattner return true; 74438374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff } 745d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff case InitListExprClass: { 746d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff const InitListExpr *Exp = cast<InitListExpr>(this); 747d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff unsigned numInits = Exp->getNumInits(); 748d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff for (unsigned i = 0; i < numInits; i++) { 749d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff if (!Exp->getInit(i)->isConstantExpr(Ctx, Loc)) { 750d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff if (Loc) *Loc = Exp->getInit(i)->getLocStart(); 751d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff return false; 752d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff } 753d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff } 754d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff return true; 755d0091aa3850a8c8be94c68710ed4ef1317729ba0Steve Naroff } 75604421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 75704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return cast<CXXDefaultArgExpr>(this)->getExpr()->isConstantExpr(Ctx, Loc); 75838374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff } 75938374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff} 76038374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff 7615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// isIntegerConstantExpr - this recursive routine will test if an expression is 7625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// an integer constant expression. Note: With the introduction of VLA's in 7635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// C99 the result of the sizeof operator is no longer always a constant 7645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// expression. The generalization of the wording to include any subexpression 7655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that is not evaluated (C99 6.6p3) means that nonconstant subexpressions 7665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// can appear as operands to other operators (e.g. &&, ||, ?:). For instance, 7675f6b632391e24b08ead3e62ba2e2765e770382edNuno Lopes/// "0 || f()" can be treated as a constant expression. In C90 this expression, 7685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// occurring in a context requiring a constant, would have been a constraint 7695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// violation. FIXME: This routine currently implements C90 semantics. 7705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// To properly implement C99 semantics this routine will need to evaluate 7715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// expressions involving operators previously mentioned. 7725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// FIXME: Pass up a reason why! Invalid operation in i-c-e, division by zero, 7745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// comma, etc 7755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 7765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// FIXME: This should ext-warn on overflow during evaluation! ISO C does not 777ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner/// permit this. This includes things like (int)1e1000 778ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// 779ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// FIXME: Handle offsetof. Two things to do: Handle GCC's __builtin_offsetof 780ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// to support gcc 4.0+ and handle the idiom GCC recognizes with a null pointer 781ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// cast+dereference. 782590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattnerbool Expr::isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 783590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner SourceLocation *Loc, bool isEvaluated) const { 784a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // Pretest for integral type; some parts of the code crash for types that 785a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // can't be sized. 786a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!getType()->isIntegralType()) { 787a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (Loc) *Loc = getLocStart(); 788a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 789a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 7905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (getStmtClass()) { 7915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 7925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 7935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 7945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ParenExprClass: 7955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return cast<ParenExpr>(this)->getSubExpr()-> 796590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated); 7975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case IntegerLiteralClass: 7985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = cast<IntegerLiteral>(this)->getValue(); 7995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8002eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner case CharacterLiteralClass: { 8012eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner const CharacterLiteral *CL = cast<CharacterLiteral>(this); 80298be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 8032eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner Result = CL->getValue(); 804f0fbcb356bc4eb5f6467dc4fc4bc447e9a630102Chris Lattner Result.setIsUnsigned(!getType()->isSignedIntegerType()); 8055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8062eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner } 807b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson case CXXBoolLiteralExprClass: { 808b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson const CXXBoolLiteralExpr *BL = cast<CXXBoolLiteralExpr>(this); 809b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 810b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson Result = BL->getValue(); 811b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson Result.setIsUnsigned(!getType()->isSignedIntegerType()); 812b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson break; 813b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson } 8147267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis case CXXZeroInitValueExprClass: 8157267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis Result.clear(); 8167267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis break; 8177b658aa315784fa489a32daeacfe400512ce468dSteve Naroff case TypesCompatibleExprClass: { 8187b658aa315784fa489a32daeacfe400512ce468dSteve Naroff const TypesCompatibleExpr *TCE = cast<TypesCompatibleExpr>(this); 81998be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 820ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // Per gcc docs "this built-in function ignores top level 821ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // qualifiers". We need to use the canonical version to properly 822ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // be able to strip CRV qualifiers from the type. 823ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T0 = Ctx.getCanonicalType(TCE->getArgType1()); 824ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T1 = Ctx.getCanonicalType(TCE->getArgType2()); 825ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar Result = Ctx.typesAreCompatible(T0.getUnqualifiedType(), 826ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar T1.getUnqualifiedType()); 827389cecc83f33e93c8ba6bf2e8269b8690404416fSteve Naroff break; 8287b658aa315784fa489a32daeacfe400512ce468dSteve Naroff } 829b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CallExprClass: 830b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CXXOperatorCallExprClass: { 83113b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff const CallExpr *CE = cast<CallExpr>(this); 83298be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 833a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 834a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // If this is a call to a builtin function, constant fold it otherwise 835a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // reject it. 836a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (CE->isBuiltinCall()) { 837a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner APValue ResultAP; 8386ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner if (CE->Evaluate(ResultAP, Ctx)) { 839a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner Result = ResultAP.getInt(); 840a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner break; // It is a constant, expand it. 841a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner } 842a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner } 843a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 84413b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff if (Loc) *Loc = getLocStart(); 84513b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff return false; 84613b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff } 8475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclRefExprClass: 8485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (const EnumConstantDecl *D = 8495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer dyn_cast<EnumConstantDecl>(cast<DeclRefExpr>(this)->getDecl())) { 8505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = D->getInitVal(); 8515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 8545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperatorClass: { 8565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const UnaryOperator *Exp = cast<UnaryOperator>(this); 8575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8580518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // Get the operand value. If this is offsetof, do not evalute the 8595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // operand. This affects C99 6.6p3. 8600518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (!Exp->isOffsetOfOp() && !Exp->getSubExpr()-> 8610518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 8625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Exp->getOpcode()) { 8655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 8665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // See C99 6.6p3. 8675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 8685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = Exp->getOperatorLoc(); 8695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Extension: 87176e773a443be9f006610f46529e07d4c8d857680Chris Lattner return true; // FIXME: this is wrong. 8725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::LNot: { 873bf7553889594886213e05cd3f94a6d6f7747bf7bChris Lattner bool Val = Result == 0; 87498be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 8755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = Val; 8765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Plus: 8795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Minus: 8815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = -Result; 8825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Not: 8845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = ~Result; 8855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8865a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson case UnaryOperator::OffsetOf: 887aa1f9f1d50adf294674b74510b62e863b68572bcDaniel Dunbar Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 8885a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson Result = Exp->evaluateOffsetOf(Ctx); 8895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8920518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl case SizeOfAlignOfExprClass: { 8930518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl const SizeOfAlignOfExpr *Exp = cast<SizeOfAlignOfExpr>(this); 894a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner 895a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner // Return the result in the right width. 89698be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 897a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner 8980518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType ArgTy = Exp->getTypeOfArgument(); 899a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner // sizeof(void) and __alignof__(void) = 1 as a gcc extension. 9000518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (ArgTy->isVoidType()) { 901a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner Result = 1; 902a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner break; 903a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner } 904a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner 905a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner // alignof always evaluates to a constant, sizeof does if arg is not VLA. 9060518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (Exp->isSizeOf() && !ArgTy->isConstantSizeType()) { 90765383479cb2caf0f136f58fecdbdbaf9c497b7a1Chris Lattner if (Loc) *Loc = Exp->getOperatorLoc(); 9085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 90965383479cb2caf0f136f58fecdbdbaf9c497b7a1Chris Lattner } 9105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 91176e773a443be9f006610f46529e07d4c8d857680Chris Lattner // Get information about the size or align. 9120518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (ArgTy->isFunctionType()) { 913efdd1574e3cca00ef0410aee8b7ee36eda5a2f71Chris Lattner // GCC extension: sizeof(function) = 1. 914efdd1574e3cca00ef0410aee8b7ee36eda5a2f71Chris Lattner Result = Exp->isSizeOf() ? 1 : 4; 9156a24acbb3dbb3bea9426716bee6ad6023ad15f3fAnders Carlsson } else { 91698be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharSize = Ctx.Target.getCharWidth(); 9176a24acbb3dbb3bea9426716bee6ad6023ad15f3fAnders Carlsson if (Exp->isSizeOf()) 9180518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl Result = Ctx.getTypeSize(ArgTy) / CharSize; 9196a24acbb3dbb3bea9426716bee6ad6023ad15f3fAnders Carlsson else 9200518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl Result = Ctx.getTypeAlign(ArgTy) / CharSize; 921060e470e53b73167114284eb0b8c3e25bb3dad99Ted Kremenek } 9225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 9235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 9245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperatorClass: { 9255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const BinaryOperator *Exp = cast<BinaryOperator>(this); 926e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar llvm::APSInt LHS, RHS; 927e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar 928e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar // Initialize result to have correct signedness and width. 929e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = llvm::APSInt(static_cast<uint32_t>(Ctx.getTypeSize(getType())), 930b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman !getType()->isSignedIntegerType()); 931b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman 9325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The LHS of a constant expr is always evaluated and needed. 933e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar if (!Exp->getLHS()->isIntegerConstantExpr(LHS, Ctx, Loc, isEvaluated)) 9345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The short-circuiting &&/|| operators don't necessarily evaluate their 9375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // RHS. Make sure to pass isEvaluated down correctly. 9385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Exp->isLogicalOp()) { 9395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool RHSEval; 9405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Exp->getOpcode() == BinaryOperator::LAnd) 941e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar RHSEval = LHS != 0; 9425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else { 9435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(Exp->getOpcode() == BinaryOperator::LOr &&"Unexpected logical"); 944e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar RHSEval = LHS == 0; 9455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 9465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 947590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner if (!Exp->getRHS()->isIntegerConstantExpr(RHS, Ctx, Loc, 9485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isEvaluated & RHSEval)) 9495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 951590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner if (!Exp->getRHS()->isIntegerConstantExpr(RHS, Ctx, Loc, isEvaluated)) 9525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 9545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Exp->getOpcode()) { 9565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 9575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 9585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Mul: 960e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS * RHS; 9615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 9625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Div: 9635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (RHS == 0) { 9645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isEvaluated) break; 9655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 9665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 968e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS / RHS; 9695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 9705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Rem: 9715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (RHS == 0) { 9725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isEvaluated) break; 9735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 9745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 976e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS % RHS; 9775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 978e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Add: Result = LHS + RHS; break; 979e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Sub: Result = LHS - RHS; break; 9805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Shl: 981e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS << 982e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar static_cast<uint32_t>(RHS.getLimitedValue(LHS.getBitWidth()-1)); 983e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar break; 9845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Shr: 985e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS >> 986e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar static_cast<uint32_t>(RHS.getLimitedValue(LHS.getBitWidth()-1)); 9875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 988e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::LT: Result = LHS < RHS; break; 989e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::GT: Result = LHS > RHS; break; 990e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::LE: Result = LHS <= RHS; break; 991e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::GE: Result = LHS >= RHS; break; 992e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::EQ: Result = LHS == RHS; break; 993e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::NE: Result = LHS != RHS; break; 994e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::And: Result = LHS & RHS; break; 995e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Xor: Result = LHS ^ RHS; break; 996e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Or: Result = LHS | RHS; break; 9975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::LAnd: 998e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS != 0 && RHS != 0; 9995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 10005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::LOr: 1001e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS != 0 || RHS != 0; 10025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 1003b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman 1004b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman case BinaryOperator::Comma: 1005b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // C99 6.6p3: "shall not contain assignment, ..., or comma operators, 1006b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // *except* when they are contained within a subexpression that is not 1007b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // evaluated". Note that Assignment can never happen due to constraints 1008b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // on the LHS subexpr, so we don't need to check it here. 1009b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman if (isEvaluated) { 1010b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman if (Loc) *Loc = getLocStart(); 1011b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman return false; 1012b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 1013b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman 1014b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // The result of the constant expr is the RHS. 1015b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman Result = RHS; 1016b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman return true; 10175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(!Exp->isAssignmentOp() && "LHS can't be a constant expr!"); 10205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 10215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 102226dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner case ImplicitCastExprClass: 10236eec8e883de118b431e3ead5b1e604a6ac68ff6bDouglas Gregor case CStyleCastExprClass: 1024987a14bf5883ef6e5d07f1c83eb6d41a8212a78cArgyrios Kyrtzidis case CXXFunctionalCastExprClass: { 10250835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis const Expr *SubExpr = cast<CastExpr>(this)->getSubExpr(); 10260835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis SourceLocation CastLoc = getLocStart(); 102726dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner 10285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.6p6: shall only convert arithmetic types to integer types. 102926dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (!SubExpr->getType()->isArithmeticType() || 103026dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner !getType()->isIntegerType()) { 103126dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (Loc) *Loc = SubExpr->getLocStart(); 10325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 10335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1034987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner 103598be4943e8dc4f3905629a7102668960873cf863Chris Lattner uint32_t DestWidth = static_cast<uint32_t>(Ctx.getTypeSize(getType())); 1036987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner 10375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle simple integer->integer casts. 103826dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (SubExpr->getType()->isIntegerType()) { 103926dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (!SubExpr->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 10405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 104126dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner 104226dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner // Figure out if this is a truncate, extend or noop cast. 104326dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner // If the input is signed, do a sign extend, noop, or truncate. 1044c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner if (getType()->isBooleanType()) { 1045c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner // Conversion to bool compares against zero. 1046c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result = Result != 0; 1047c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result.zextOrTrunc(DestWidth); 1048c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner } else if (SubExpr->getType()->isSignedIntegerType()) 104926dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner Result.sextOrTrunc(DestWidth); 105026dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner else // If the input is unsigned, do a zero extend, noop, or truncate. 105126dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner Result.zextOrTrunc(DestWidth); 10525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 10535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Allow floating constants that are the immediate operands of casts or that 10565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // are parenthesized. 105726dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner const Expr *Operand = SubExpr; 10585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (const ParenExpr *PE = dyn_cast<ParenExpr>(Operand)) 10595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Operand = PE->getSubExpr(); 1060987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner 1061987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner // If this isn't a floating literal, we can't handle it. 1062987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner const FloatingLiteral *FL = dyn_cast<FloatingLiteral>(Operand); 1063987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner if (!FL) { 1064987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner if (Loc) *Loc = Operand->getLocStart(); 1065987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner return false; 1066987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner } 1067c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner 1068c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner // If the destination is boolean, compare against zero. 1069c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner if (getType()->isBooleanType()) { 1070c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result = !FL->getValue().isZero(); 1071c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result.zextOrTrunc(DestWidth); 1072c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner break; 1073c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner } 10745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1075987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner // Determine whether we are converting to unsigned or signed. 1076987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner bool DestSigned = getType()->isSignedIntegerType(); 1077ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner 1078ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner // TODO: Warn on overflow, but probably not here: isIntegerConstantExpr can 1079ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner // be called multiple times per AST. 1080ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen uint64_t Space[4]; 1081ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen bool ignored; 1082ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner (void)FL->getValue().convertToInteger(Space, DestWidth, DestSigned, 1083ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen llvm::APFloat::rmTowardZero, 1084ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen &ignored); 1085987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner Result = llvm::APInt(DestWidth, 4, Space); 1086987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner break; 10875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ConditionalOperatorClass: { 10895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const ConditionalOperator *Exp = cast<ConditionalOperator>(this); 10905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1091590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner if (!Exp->getCond()->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 10925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 10935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const Expr *TrueExp = Exp->getLHS(); 10955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const Expr *FalseExp = Exp->getRHS(); 10965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Result == 0) std::swap(TrueExp, FalseExp); 10975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Evaluate the false one first, discard the result. 10993907323dd6665c0c4e383435cb145233f4533406Anders Carlsson if (FalseExp && !FalseExp->isIntegerConstantExpr(Result, Ctx, Loc, false)) 11005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 11015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Evalute the true one, capture the result. 11023907323dd6665c0c4e383435cb145233f4533406Anders Carlsson if (TrueExp && 11033907323dd6665c0c4e383435cb145233f4533406Anders Carlsson !TrueExp->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 11045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 11055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 11065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 110704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 110804421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return cast<CXXDefaultArgExpr>(this) 110904421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner ->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated); 11105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 11115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 11125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Cases that are valid constant exprs fall through to here. 11135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result.setIsUnsigned(getType()->isUnsignedIntegerType()); 11145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 11155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 11165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 11175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an 11185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer constant expression with the value zero, or if this is one that is 11195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// cast to void*. 1120590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattnerbool Expr::isNullPointerConstant(ASTContext &Ctx) const { 11210777972d38a3125efed962b045704c30ae6965cfSebastian Redl // Strip off a cast to void*, if it exists. Except in C++. 11220835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) { 11236215dee86c0e715b9f2b0d401ab2a5fcf629f1afSebastian Redl if (!Ctx.getLangOptions().CPlusPlus) { 11240777972d38a3125efed962b045704c30ae6965cfSebastian Redl // Check that it is a cast to void*. 11250777972d38a3125efed962b045704c30ae6965cfSebastian Redl if (const PointerType *PT = CE->getType()->getAsPointerType()) { 11260777972d38a3125efed962b045704c30ae6965cfSebastian Redl QualType Pointee = PT->getPointeeType(); 11270777972d38a3125efed962b045704c30ae6965cfSebastian Redl if (Pointee.getCVRQualifiers() == 0 && 11280777972d38a3125efed962b045704c30ae6965cfSebastian Redl Pointee->isVoidType() && // to void* 11290777972d38a3125efed962b045704c30ae6965cfSebastian Redl CE->getSubExpr()->getType()->isIntegerType()) // from int. 11300777972d38a3125efed962b045704c30ae6965cfSebastian Redl return CE->getSubExpr()->isNullPointerConstant(Ctx); 11310777972d38a3125efed962b045704c30ae6965cfSebastian Redl } 11325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1133aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) { 1134aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // Ignore the ImplicitCastExpr type entirely. 1135aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff return ICE->getSubExpr()->isNullPointerConstant(Ctx); 1136aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) { 1137aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // Accept ((void*)0) as a null pointer constant, as many other 1138aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // implementations do. 1139aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff return PE->getSubExpr()->isNullPointerConstant(Ctx); 11408123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner } else if (const CXXDefaultArgExpr *DefaultArg 11418123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner = dyn_cast<CXXDefaultArgExpr>(this)) { 114204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // See through default argument expressions 114304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return DefaultArg->getExpr()->isNullPointerConstant(Ctx); 1144aaffbf7c790a324ed114184db771aae2d2e9151cSteve Naroff } 1145aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff 1146aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // This expression must be an integer type. 1147aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff if (!getType()->isIntegerType()) 1148aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff return false; 1149aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff 11505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we have an integer constant expression, we need to *evaluate* it and 11515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // test for the value 0. 11525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer llvm::APSInt Val(32); 1153aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff return isIntegerConstantExpr(Val, Ctx, 0, true) && Val == 0; 11545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 115531a458462c6cf417a84e0c47852b18fb22d79acbSteve Naroff 115627c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// isBitField - Return true if this expression is a bit-field. 115727c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregorbool Expr::isBitField() { 115827c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor Expr *E = this->IgnoreParenCasts(); 115927c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E)) 116027c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor return MemRef->getMemberDecl()->isBitField(); 116127c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor return false; 116227c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor} 116327c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor 1164213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begemanunsigned ExtVectorElementExpr::getNumElements() const { 11658a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman if (const VectorType *VT = getType()->getAsVectorType()) 11668a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman return VT->getNumElements(); 11678a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman return 1; 11684d0ac88428b3ed7c6f3a2f4e758ea5424ecd70aeChris Lattner} 11694d0ac88428b3ed7c6f3a2f4e758ea5424ecd70aeChris Lattner 11708a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman/// containsDuplicateElements - Return true if any element access is repeated. 1171213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begemanbool ExtVectorElementExpr::containsDuplicateElements() const { 1172fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff const char *compStr = Accessor.getName(); 11737e3e9b152e06edf329ceb32190d3255f248d4d5fChris Lattner unsigned length = Accessor.getLength(); 1174fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff 11757e3e9b152e06edf329ceb32190d3255f248d4d5fChris Lattner for (unsigned i = 0; i != length-1; i++) { 1176fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff const char *s = compStr+i; 1177fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff for (const char c = *s++; *s; s++) 1178fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff if (c == *s) 1179fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return true; 1180fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff } 1181fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return false; 1182fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff} 1183b8f849da3cedee2f61ad98389115ddd04e439d60Chris Lattner 11848a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman/// getEncodedElementAccess - We encode the fields as a llvm ConstantArray. 11853b8d116703db8018f855cbb4733ace426422623bNate Begemanvoid ExtVectorElementExpr::getEncodedElementAccess( 11863b8d116703db8018f855cbb4733ace426422623bNate Begeman llvm::SmallVectorImpl<unsigned> &Elts) const { 118792e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isHi = Accessor.isStr("hi"); 118892e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isLo = Accessor.isStr("lo"); 118992e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isEven = Accessor.isStr("e"); 119092e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isOdd = Accessor.isStr("o"); 11918a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman 11927e3e9b152e06edf329ceb32190d3255f248d4d5fChris Lattner const char *compStr = Accessor.getName(); 11938a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman for (unsigned i = 0, e = getNumElements(); i != e; ++i) { 11948a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman uint64_t Index; 11958a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman 11968a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman if (isHi) 11978a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = e + i; 11988a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else if (isLo) 11998a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = i; 12008a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else if (isEven) 12018a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = 2 * i; 12028a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else if (isOdd) 12038a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = 2 * i + 1; 12048a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else 12058a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = ExtVectorType::getAccessorIdx(compStr[i]); 1206b8f849da3cedee2f61ad98389115ddd04e439d60Chris Lattner 12073b8d116703db8018f855cbb4733ace426422623bNate Begeman Elts.push_back(Index); 1208b8f849da3cedee2f61ad98389115ddd04e439d60Chris Lattner } 12098a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman} 12108a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman 121168d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff// constructor for instance messages. 1212bcfb06ac6da1aa3c74ac1ef7a49c2807522366e7Steve NaroffObjCMessageExpr::ObjCMessageExpr(Expr *receiver, Selector selInfo, 1213a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek QualType retType, ObjCMethodDecl *mproto, 1214db611d556f71f98b66b69514d45958d76e5727abSteve Naroff SourceLocation LBrac, SourceLocation RBrac, 121549f109c786f99eb7468dac3976db083a65493444Steve Naroff Expr **ArgExprs, unsigned nargs) 1216db611d556f71f98b66b69514d45958d76e5727abSteve Naroff : Expr(ObjCMessageExprClass, retType), SelName(selInfo), 1217ea958e57a370b641c5a69347b75e9f8e3b5a41a2Ted Kremenek MethodProto(mproto) { 121849f109c786f99eb7468dac3976db083a65493444Steve Naroff NumArgs = nargs; 12195549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek SubExprs = new Stmt*[NumArgs+1]; 122068d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff SubExprs[RECEIVER] = receiver; 122149f109c786f99eb7468dac3976db083a65493444Steve Naroff if (NumArgs) { 122249f109c786f99eb7468dac3976db083a65493444Steve Naroff for (unsigned i = 0; i != NumArgs; ++i) 122368d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); 122468d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff } 1225563477da25f824e37c535131695dc4dc9b68c465Steve Naroff LBracloc = LBrac; 1226563477da25f824e37c535131695dc4dc9b68c465Steve Naroff RBracloc = RBrac; 1227563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1228563477da25f824e37c535131695dc4dc9b68c465Steve Naroff 122968d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff// constructor for class messages. 123068d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff// FIXME: clsName should be typed to ObjCInterfaceType 1231bcfb06ac6da1aa3c74ac1ef7a49c2807522366e7Steve NaroffObjCMessageExpr::ObjCMessageExpr(IdentifierInfo *clsName, Selector selInfo, 1232a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek QualType retType, ObjCMethodDecl *mproto, 1233db611d556f71f98b66b69514d45958d76e5727abSteve Naroff SourceLocation LBrac, SourceLocation RBrac, 123449f109c786f99eb7468dac3976db083a65493444Steve Naroff Expr **ArgExprs, unsigned nargs) 1235db611d556f71f98b66b69514d45958d76e5727abSteve Naroff : Expr(ObjCMessageExprClass, retType), SelName(selInfo), 1236ea958e57a370b641c5a69347b75e9f8e3b5a41a2Ted Kremenek MethodProto(mproto) { 123749f109c786f99eb7468dac3976db083a65493444Steve Naroff NumArgs = nargs; 12385549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek SubExprs = new Stmt*[NumArgs+1]; 12394df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs[RECEIVER] = (Expr*) ((uintptr_t) clsName | IsClsMethDeclUnknown); 124049f109c786f99eb7468dac3976db083a65493444Steve Naroff if (NumArgs) { 124149f109c786f99eb7468dac3976db083a65493444Steve Naroff for (unsigned i = 0; i != NumArgs; ++i) 124268d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); 124368d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff } 1244563477da25f824e37c535131695dc4dc9b68c465Steve Naroff LBracloc = LBrac; 1245563477da25f824e37c535131695dc4dc9b68c465Steve Naroff RBracloc = RBrac; 1246563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1247563477da25f824e37c535131695dc4dc9b68c465Steve Naroff 12484df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek// constructor for class messages. 12494df728e368fa1f65ffc57572fed613dcca5b4fe8Ted KremenekObjCMessageExpr::ObjCMessageExpr(ObjCInterfaceDecl *cls, Selector selInfo, 12504df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek QualType retType, ObjCMethodDecl *mproto, 12514df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SourceLocation LBrac, SourceLocation RBrac, 12524df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek Expr **ArgExprs, unsigned nargs) 12534df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek: Expr(ObjCMessageExprClass, retType), SelName(selInfo), 12544df728e368fa1f65ffc57572fed613dcca5b4fe8Ted KremenekMethodProto(mproto) { 12554df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek NumArgs = nargs; 12564df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs = new Stmt*[NumArgs+1]; 12574df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs[RECEIVER] = (Expr*) ((uintptr_t) cls | IsClsMethDeclKnown); 12584df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek if (NumArgs) { 12594df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek for (unsigned i = 0; i != NumArgs; ++i) 12604df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); 12614df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek } 12624df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek LBracloc = LBrac; 12634df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek RBracloc = RBrac; 12644df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek} 12654df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek 12664df728e368fa1f65ffc57572fed613dcca5b4fe8Ted KremenekObjCMessageExpr::ClassInfo ObjCMessageExpr::getClassInfo() const { 12674df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek uintptr_t x = (uintptr_t) SubExprs[RECEIVER]; 12684df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek switch (x & Flags) { 12694df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek default: 12704df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek assert(false && "Invalid ObjCMessageExpr."); 12714df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek case IsInstMeth: 12724df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek return ClassInfo(0, 0); 12734df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek case IsClsMethDeclUnknown: 12744df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek return ClassInfo(0, (IdentifierInfo*) (x & ~Flags)); 12754df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek case IsClsMethDeclKnown: { 12764df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek ObjCInterfaceDecl* D = (ObjCInterfaceDecl*) (x & ~Flags); 12774df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek return ClassInfo(D, D->getIdentifier()); 12784df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek } 12794df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek } 12804df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek} 12814df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek 128227437caadea35f84d550cd29f024fcf3ea240eecChris Lattnerbool ChooseExpr::isConditionTrue(ASTContext &C) const { 128332442bbc98bafa512fa42d46fedf60ed7d79f574Daniel Dunbar return getCond()->getIntegerConstantExprValue(C) != 0; 128427437caadea35f84d550cd29f024fcf3ea240eecChris Lattner} 128527437caadea35f84d550cd29f024fcf3ea240eecChris Lattner 12865a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlssonstatic int64_t evaluateOffsetOf(ASTContext& C, const Expr *E) 12875a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson{ 12885a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { 12895a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson QualType Ty = ME->getBase()->getType(); 12905a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 12915a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson RecordDecl *RD = Ty->getAsRecordType()->getDecl(); 129298be4943e8dc4f3905629a7102668960873cf863Chris Lattner const ASTRecordLayout &RL = C.getASTRecordLayout(RD); 12935a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson FieldDecl *FD = ME->getMemberDecl(); 12945a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 12955a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson // FIXME: This is linear time. 12965a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson unsigned i = 0, e = 0; 12975a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson for (i = 0, e = RD->getNumMembers(); i != e; i++) { 12985a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson if (RD->getMember(i) == FD) 12995a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson break; 13005a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson } 13015a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 13025a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson return RL.getFieldOffset(i) + evaluateOffsetOf(C, ME->getBase()); 13035a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson } else if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) { 13045a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson const Expr *Base = ASE->getBase(); 13055a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 130698be4943e8dc4f3905629a7102668960873cf863Chris Lattner int64_t size = C.getTypeSize(ASE->getType()); 130732442bbc98bafa512fa42d46fedf60ed7d79f574Daniel Dunbar size *= ASE->getIdx()->getIntegerConstantExprValue(C).getSExtValue(); 13085a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 13095a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson return size + evaluateOffsetOf(C, Base); 13105a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson } else if (isa<CompoundLiteralExpr>(E)) 13115a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson return 0; 13125a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 13135a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson assert(0 && "Unknown offsetof subexpression!"); 13145a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson return 0; 13155a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson} 13165a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 13175a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlssonint64_t UnaryOperator::evaluateOffsetOf(ASTContext& C) const 13185a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson{ 13195a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson assert(Opc == OffsetOf && "Unary operator not offsetof!"); 13205a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 132198be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharSize = C.Target.getCharWidth(); 13225549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return ::evaluateOffsetOf(C, cast<Expr>(Val)) / CharSize; 13235a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson} 13245a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 13250518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redlvoid SizeOfAlignOfExpr::Destroy(ASTContext& C) { 13260518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // Override default behavior of traversing children. If this has a type 13270518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // operand and the type is a variable-length array, the child iteration 13280518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // will iterate over the size expression. However, this expression belongs 13290518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // to the type, not to this, so we don't want to delete it. 13300518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // We still want to delete this expression. 13310518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // FIXME: Same as in Stmt::Destroy - will be eventually in ASTContext's 13320518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // pool allocator. 13330518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (isArgumentType()) 13340518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl delete this; 13350518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl else 13360518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl Expr::Destroy(C); 13379048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar} 13389048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar 133977ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek//===----------------------------------------------------------------------===// 1340ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek// ExprIterator. 1341ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek//===----------------------------------------------------------------------===// 1342ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek 1343ce2fc3a343ea6098a96d587071cee7299f11957aTed KremenekExpr* ExprIterator::operator[](size_t idx) { return cast<Expr>(I[idx]); } 1344ce2fc3a343ea6098a96d587071cee7299f11957aTed KremenekExpr* ExprIterator::operator*() const { return cast<Expr>(*I); } 1345ce2fc3a343ea6098a96d587071cee7299f11957aTed KremenekExpr* ExprIterator::operator->() const { return cast<Expr>(*I); } 1346ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenekconst Expr* ConstExprIterator::operator[](size_t idx) const { 1347ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek return cast<Expr>(I[idx]); 1348ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek} 1349ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenekconst Expr* ConstExprIterator::operator*() const { return cast<Expr>(*I); } 1350ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenekconst Expr* ConstExprIterator::operator->() const { return cast<Expr>(*I); } 1351ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek 1352ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek//===----------------------------------------------------------------------===// 135377ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// Child Iterators for iterating over subexpressions/substatements 135477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek//===----------------------------------------------------------------------===// 135577ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 135677ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// DeclRefExpr 13579ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator DeclRefExpr::child_begin() { return child_iterator(); } 13589ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator DeclRefExpr::child_end() { return child_iterator(); } 135977ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 13607779db42c94405ecbd6ee45efb293483fa6cbeffSteve Naroff// ObjCIvarRefExpr 13615549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCIvarRefExpr::child_begin() { return &Base; } 13625549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCIvarRefExpr::child_end() { return &Base+1; } 13637779db42c94405ecbd6ee45efb293483fa6cbeffSteve Naroff 1364e3e9add4fd788927df6f545570e7838db59c01d7Steve Naroff// ObjCPropertyRefExpr 13655549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCPropertyRefExpr::child_begin() { return &Base; } 13665549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCPropertyRefExpr::child_end() { return &Base+1; } 1367ae7840776d6cd31b4d7a4a345b61bcbb3744df6cSteve Naroff 13685daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian// ObjCKVCRefExpr 13695daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz JahanianStmt::child_iterator ObjCKVCRefExpr::child_begin() { return &Base; } 13705daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz JahanianStmt::child_iterator ObjCKVCRefExpr::child_end() { return &Base+1; } 13715daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 1372cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas Gregor// ObjCSuperExpr 1373cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas GregorStmt::child_iterator ObjCSuperExpr::child_begin() { return child_iterator(); } 1374cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas GregorStmt::child_iterator ObjCSuperExpr::child_end() { return child_iterator(); } 1375cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas Gregor 1376d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris Lattner// PredefinedExpr 1377d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris LattnerStmt::child_iterator PredefinedExpr::child_begin() { return child_iterator(); } 1378d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris LattnerStmt::child_iterator PredefinedExpr::child_end() { return child_iterator(); } 137977ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 138077ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// IntegerLiteral 13819ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator IntegerLiteral::child_begin() { return child_iterator(); } 13829ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator IntegerLiteral::child_end() { return child_iterator(); } 138377ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 138477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// CharacterLiteral 13859ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator CharacterLiteral::child_begin() { return child_iterator(); } 13869ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator CharacterLiteral::child_end() { return child_iterator(); } 138777ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 138877ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// FloatingLiteral 13899ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator FloatingLiteral::child_begin() { return child_iterator(); } 13909ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator FloatingLiteral::child_end() { return child_iterator(); } 139177ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 13925d66145eed1c319df5a69977cb8ff74f597ea544Chris Lattner// ImaginaryLiteral 13935549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ImaginaryLiteral::child_begin() { return &Val; } 13945549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ImaginaryLiteral::child_end() { return &Val+1; } 13955d66145eed1c319df5a69977cb8ff74f597ea544Chris Lattner 139677ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// StringLiteral 13979ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator StringLiteral::child_begin() { return child_iterator(); } 13989ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator StringLiteral::child_end() { return child_iterator(); } 139977ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 140077ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// ParenExpr 14015549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ParenExpr::child_begin() { return &Val; } 14025549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ParenExpr::child_end() { return &Val+1; } 140377ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 140477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// UnaryOperator 14055549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator UnaryOperator::child_begin() { return &Val; } 14065549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator UnaryOperator::child_end() { return &Val+1; } 140777ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 14080518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl// SizeOfAlignOfExpr 14090518999d3adcc289997bd974dce90cc97f5c1c44Sebastian RedlStmt::child_iterator SizeOfAlignOfExpr::child_begin() { 14100518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // If this is of a type and the type is a VLA type (and not a typedef), the 14110518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // size expression of the VLA needs to be treated as an executable expression. 14120518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // Why isn't this weirdness documented better in StmtIterator? 14130518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (isArgumentType()) { 14140518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (VariableArrayType* T = dyn_cast<VariableArrayType>( 14150518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl getArgumentType().getTypePtr())) 14160518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return child_iterator(T); 14170518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return child_iterator(); 14180518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl } 14190518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return child_iterator((Stmt**)&Argument); 14209ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14210518999d3adcc289997bd974dce90cc97f5c1c44Sebastian RedlStmt::child_iterator SizeOfAlignOfExpr::child_end() { 14220518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (isArgumentType()) 14230518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return child_iterator(); 14240518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return child_iterator((Stmt**)&Argument + 1); 14259ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 142677ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 142777ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// ArraySubscriptExpr 14281237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ArraySubscriptExpr::child_begin() { 14295549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 143077ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 14311237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ArraySubscriptExpr::child_end() { 14325549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+END_EXPR; 143377ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 143477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 143577ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// CallExpr 14361237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator CallExpr::child_begin() { 14375549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 143877ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 14391237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator CallExpr::child_end() { 14405549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+NumArgs+ARGS_START; 144177ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 14421237c673c07f9d827129ba02720108816abde562Ted Kremenek 14431237c673c07f9d827129ba02720108816abde562Ted Kremenek// MemberExpr 14445549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator MemberExpr::child_begin() { return &Base; } 14455549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator MemberExpr::child_end() { return &Base+1; } 14461237c673c07f9d827129ba02720108816abde562Ted Kremenek 1447213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman// ExtVectorElementExpr 14485549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ExtVectorElementExpr::child_begin() { return &Base; } 14495549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ExtVectorElementExpr::child_end() { return &Base+1; } 14501237c673c07f9d827129ba02720108816abde562Ted Kremenek 14511237c673c07f9d827129ba02720108816abde562Ted Kremenek// CompoundLiteralExpr 14525549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CompoundLiteralExpr::child_begin() { return &Init; } 14535549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CompoundLiteralExpr::child_end() { return &Init+1; } 14541237c673c07f9d827129ba02720108816abde562Ted Kremenek 14551237c673c07f9d827129ba02720108816abde562Ted Kremenek// CastExpr 14565549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CastExpr::child_begin() { return &Op; } 14575549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CastExpr::child_end() { return &Op+1; } 14581237c673c07f9d827129ba02720108816abde562Ted Kremenek 14591237c673c07f9d827129ba02720108816abde562Ted Kremenek// BinaryOperator 14601237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator BinaryOperator::child_begin() { 14615549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 14621237c673c07f9d827129ba02720108816abde562Ted Kremenek} 14631237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator BinaryOperator::child_end() { 14645549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+END_EXPR; 14651237c673c07f9d827129ba02720108816abde562Ted Kremenek} 14661237c673c07f9d827129ba02720108816abde562Ted Kremenek 14671237c673c07f9d827129ba02720108816abde562Ted Kremenek// ConditionalOperator 14681237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ConditionalOperator::child_begin() { 14695549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 14701237c673c07f9d827129ba02720108816abde562Ted Kremenek} 14711237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ConditionalOperator::child_end() { 14725549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+END_EXPR; 14731237c673c07f9d827129ba02720108816abde562Ted Kremenek} 14741237c673c07f9d827129ba02720108816abde562Ted Kremenek 14751237c673c07f9d827129ba02720108816abde562Ted Kremenek// AddrLabelExpr 14769ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator AddrLabelExpr::child_begin() { return child_iterator(); } 14779ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator AddrLabelExpr::child_end() { return child_iterator(); } 14781237c673c07f9d827129ba02720108816abde562Ted Kremenek 14791237c673c07f9d827129ba02720108816abde562Ted Kremenek// StmtExpr 14805549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator StmtExpr::child_begin() { return &SubStmt; } 14815549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator StmtExpr::child_end() { return &SubStmt+1; } 14821237c673c07f9d827129ba02720108816abde562Ted Kremenek 14831237c673c07f9d827129ba02720108816abde562Ted Kremenek// TypesCompatibleExpr 14849ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator TypesCompatibleExpr::child_begin() { 14859ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14869ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14879ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek 14889ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator TypesCompatibleExpr::child_end() { 14899ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14909ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14911237c673c07f9d827129ba02720108816abde562Ted Kremenek 14921237c673c07f9d827129ba02720108816abde562Ted Kremenek// ChooseExpr 14935549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ChooseExpr::child_begin() { return &SubExprs[0]; } 14945549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ChooseExpr::child_end() { return &SubExprs[0]+END_EXPR; } 14951237c673c07f9d827129ba02720108816abde562Ted Kremenek 1496e2ce1d9440186cf3332368291cd884a6e3ae8946Nate Begeman// OverloadExpr 14975549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator OverloadExpr::child_begin() { return &SubExprs[0]; } 14985549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator OverloadExpr::child_end() { return &SubExprs[0]+NumExprs; } 1499e2ce1d9440186cf3332368291cd884a6e3ae8946Nate Begeman 1500d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman// ShuffleVectorExpr 1501d38617c8a50f9729c254ab76cd359af797c6739bEli FriedmanStmt::child_iterator ShuffleVectorExpr::child_begin() { 15025549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 1503d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman} 1504d38617c8a50f9729c254ab76cd359af797c6739bEli FriedmanStmt::child_iterator ShuffleVectorExpr::child_end() { 15055549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+NumExprs; 1506d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman} 1507d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman 15087c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson// VAArgExpr 15095549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator VAArgExpr::child_begin() { return &Val; } 15105549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator VAArgExpr::child_end() { return &Val+1; } 15117c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson 151266b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson// InitListExpr 151366b5a8a39088598c01a9fa6f032dc908612dc8ecAnders CarlssonStmt::child_iterator InitListExpr::child_begin() { 15145549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return InitExprs.size() ? &InitExprs[0] : 0; 151566b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson} 151666b5a8a39088598c01a9fa6f032dc908612dc8ecAnders CarlssonStmt::child_iterator InitListExpr::child_end() { 15175549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return InitExprs.size() ? &InitExprs[0] + InitExprs.size() : 0; 151866b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson} 151966b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson 15201237c673c07f9d827129ba02720108816abde562Ted Kremenek// ObjCStringLiteral 15219ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCStringLiteral::child_begin() { 15229ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15239ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 15249ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCStringLiteral::child_end() { 15259ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15269ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 15271237c673c07f9d827129ba02720108816abde562Ted Kremenek 15281237c673c07f9d827129ba02720108816abde562Ted Kremenek// ObjCEncodeExpr 15299ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCEncodeExpr::child_begin() { return child_iterator(); } 15309ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCEncodeExpr::child_end() { return child_iterator(); } 15311237c673c07f9d827129ba02720108816abde562Ted Kremenek 1532b62f6813406a03bf8a371c4e46c9fad51d102121Fariborz Jahanian// ObjCSelectorExpr 15339ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCSelectorExpr::child_begin() { 15349ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15359ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 15369ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCSelectorExpr::child_end() { 15379ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15389ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 1539b62f6813406a03bf8a371c4e46c9fad51d102121Fariborz Jahanian 1540390d50a725497e99247dc104a7d2c2a255d3af14Fariborz Jahanian// ObjCProtocolExpr 15419ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCProtocolExpr::child_begin() { 15429ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15439ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 15449ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCProtocolExpr::child_end() { 15459ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15469ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 1547390d50a725497e99247dc104a7d2c2a255d3af14Fariborz Jahanian 1548563477da25f824e37c535131695dc4dc9b68c465Steve Naroff// ObjCMessageExpr 1549ea958e57a370b641c5a69347b75e9f8e3b5a41a2Ted KremenekStmt::child_iterator ObjCMessageExpr::child_begin() { 15505549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return getReceiver() ? &SubExprs[0] : &SubExprs[0] + ARGS_START; 1551563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1552563477da25f824e37c535131695dc4dc9b68c465Steve NaroffStmt::child_iterator ObjCMessageExpr::child_end() { 15535549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+ARGS_START+getNumArgs(); 1554563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1555563477da25f824e37c535131695dc4dc9b68c465Steve Naroff 15564eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff// Blocks 155756ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve NaroffStmt::child_iterator BlockExpr::child_begin() { return child_iterator(); } 155856ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve NaroffStmt::child_iterator BlockExpr::child_end() { return child_iterator(); } 15594eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 15609da13f9ddb2567e36f4bbee7b3c32f54aeb76d5bTed KremenekStmt::child_iterator BlockDeclRefExpr::child_begin() { return child_iterator();} 15619da13f9ddb2567e36f4bbee7b3c32f54aeb76d5bTed KremenekStmt::child_iterator BlockDeclRefExpr::child_end() { return child_iterator(); } 1562