Expr.cpp revision 44b4321feab46299d3f5cfd404680884752a0fcf
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) 106898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor : Expr(SC, t, 107898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor fn->isTypeDependent() || hasAnyTypeDependentArguments(args, numargs), 108898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor fn->isValueDependent() || hasAnyValueDependentArguments(args, numargs)), 109898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor NumArgs(numargs) { 110b4609806e9232593ece09ce08b630836e825865cDouglas Gregor SubExprs = new Stmt*[numargs+1]; 111b4609806e9232593ece09ce08b630836e825865cDouglas Gregor SubExprs[FN] = fn; 112b4609806e9232593ece09ce08b630836e825865cDouglas Gregor for (unsigned i = 0; i != numargs; ++i) 113b4609806e9232593ece09ce08b630836e825865cDouglas Gregor SubExprs[i+ARGS_START] = args[i]; 114b4609806e9232593ece09ce08b630836e825865cDouglas Gregor RParenLoc = rparenloc; 115b4609806e9232593ece09ce08b630836e825865cDouglas Gregor} 116e2ce1d9440186cf3332368291cd884a6e3ae8946Nate Begeman 1175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid SpencerCallExpr::CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t, 1185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer SourceLocation rparenloc) 119898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor : Expr(CallExprClass, t, 120898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor fn->isTypeDependent() || hasAnyTypeDependentArguments(args, numargs), 121898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor fn->isValueDependent() || hasAnyValueDependentArguments(args, numargs)), 122898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor NumArgs(numargs) { 1235549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek SubExprs = new Stmt*[numargs+1]; 12477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek SubExprs[FN] = fn; 1255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer for (unsigned i = 0; i != numargs; ++i) 12677ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek SubExprs[i+ARGS_START] = args[i]; 1275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer RParenLoc = rparenloc; 1285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 1295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 130d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner/// setNumArgs - This changes the number of arguments present in this call. 131d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner/// Any orphaned expressions are deleted by this, and any new operands are set 132d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner/// to null. 133d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattnervoid CallExpr::setNumArgs(unsigned NumArgs) { 134d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner // No change, just return. 135d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner if (NumArgs == getNumArgs()) return; 136d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner 137d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner // If shrinking # arguments, just delete the extras and forgot them. 138d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner if (NumArgs < getNumArgs()) { 139d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner for (unsigned i = NumArgs, e = getNumArgs(); i != e; ++i) 140d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner delete getArg(i); 141d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner this->NumArgs = NumArgs; 142d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner return; 143d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner } 144d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner 145d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner // Otherwise, we are growing the # arguments. New an bigger argument array. 1465549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek Stmt **NewSubExprs = new Stmt*[NumArgs+1]; 147d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner // Copy over args. 148d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner for (unsigned i = 0; i != getNumArgs()+ARGS_START; ++i) 149d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner NewSubExprs[i] = SubExprs[i]; 150d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner // Null out new args. 151d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner for (unsigned i = getNumArgs()+ARGS_START; i != NumArgs+ARGS_START; ++i) 152d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner NewSubExprs[i] = 0; 153d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner 154d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner delete[] SubExprs; 155d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner SubExprs = NewSubExprs; 156d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner this->NumArgs = NumArgs; 157d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner} 158d18b3299debb7b0dbd9d34d9369189dc98c87f53Chris Lattner 159cb888967400a03504c88acedd5248d6778a82f46Chris Lattner/// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If 160cb888967400a03504c88acedd5248d6778a82f46Chris Lattner/// not, return 0. 161cb888967400a03504c88acedd5248d6778a82f46Chris Lattnerunsigned CallExpr::isBuiltinCall() const { 162c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff // All simple function calls (e.g. func()) are implicitly cast to pointer to 163c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff // function. As a result, we try and obtain the DeclRefExpr from the 164c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff // ImplicitCastExpr. 165c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee()); 166c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()). 167cb888967400a03504c88acedd5248d6778a82f46Chris Lattner return 0; 168cb888967400a03504c88acedd5248d6778a82f46Chris Lattner 169c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr()); 170c4f8e8b645b8e0e685c089dde0674c6f29a24168Steve Naroff if (!DRE) 171cb888967400a03504c88acedd5248d6778a82f46Chris Lattner return 0; 172cb888967400a03504c88acedd5248d6778a82f46Chris Lattner 173bcba201a1118d7852b8b97187d495ae2a4f49519Anders Carlsson const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl()); 174bcba201a1118d7852b8b97187d495ae2a4f49519Anders Carlsson if (!FDecl) 175cb888967400a03504c88acedd5248d6778a82f46Chris Lattner return 0; 176cb888967400a03504c88acedd5248d6778a82f46Chris Lattner 1774fcd399a52ae45ed8ebfdd3a25e01cfb76fa366dDouglas Gregor if (!FDecl->getIdentifier()) 1784fcd399a52ae45ed8ebfdd3a25e01cfb76fa366dDouglas Gregor return 0; 1794fcd399a52ae45ed8ebfdd3a25e01cfb76fa366dDouglas Gregor 180cb888967400a03504c88acedd5248d6778a82f46Chris Lattner return FDecl->getIdentifier()->getBuiltinID(); 181cb888967400a03504c88acedd5248d6778a82f46Chris Lattner} 182bcba201a1118d7852b8b97187d495ae2a4f49519Anders Carlsson 183cb888967400a03504c88acedd5248d6778a82f46Chris Lattner 1845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// getOpcodeStr - Turn an Opcode enum value into the punctuation char it 1855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// corresponds to, e.g. "<<=". 1865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerconst char *BinaryOperator::getOpcodeStr(Opcode Op) { 1875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Op) { 1885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: assert(0 && "Unknown binary operator"); 1895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Mul: return "*"; 1905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Div: return "/"; 1915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Rem: return "%"; 1925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Add: return "+"; 1935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Sub: return "-"; 1945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Shl: return "<<"; 1955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Shr: return ">>"; 1965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LT: return "<"; 1975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case GT: return ">"; 1985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LE: return "<="; 1995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case GE: return ">="; 2005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case EQ: return "=="; 2015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case NE: return "!="; 2025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case And: return "&"; 2035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Xor: return "^"; 2045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Or: return "|"; 2055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LAnd: return "&&"; 2065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LOr: return "||"; 2075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Assign: return "="; 2085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case MulAssign: return "*="; 2095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DivAssign: return "/="; 2105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case RemAssign: return "%="; 2115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case AddAssign: return "+="; 2125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case SubAssign: return "-="; 2135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ShlAssign: return "<<="; 2145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ShrAssign: return ">>="; 2155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case AndAssign: return "&="; 2165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case XorAssign: return "^="; 2175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case OrAssign: return "|="; 2185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case Comma: return ","; 2195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 2215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 22266b5a8a39088598c01a9fa6f032dc908612dc8ecAnders CarlssonInitListExpr::InitListExpr(SourceLocation lbraceloc, 223418f6c7d142e5ff4607f70cd8431d008442bafe9Chris Lattner Expr **initExprs, unsigned numInits, 224418f6c7d142e5ff4607f70cd8431d008442bafe9Chris Lattner SourceLocation rbraceloc, bool hadDesignators) 225c5ae899b4bbf65488445316c63168079177db0edSteve Naroff : Expr(InitListExprClass, QualType()), 226418f6c7d142e5ff4607f70cd8431d008442bafe9Chris Lattner LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), HadDesignators(hadDesignators) { 227418f6c7d142e5ff4607f70cd8431d008442bafe9Chris Lattner 228418f6c7d142e5ff4607f70cd8431d008442bafe9Chris Lattner InitExprs.insert(InitExprs.end(), initExprs, initExprs+numInits); 22966b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson} 2305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 231bfdcae678d44906293e21c0cddc6537f3ee8b5a4Steve Naroff/// getFunctionType - Return the underlying function type for this block. 2324eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff/// 2334eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroffconst FunctionType *BlockExpr::getFunctionType() const { 2344eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff return getType()->getAsBlockPointerType()-> 2354eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff getPointeeType()->getAsFunctionType(); 2364eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff} 2374eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 23856ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve NaroffSourceLocation BlockExpr::getCaretLocation() const { 23956ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve Naroff return TheBlock->getCaretLocation(); 24056ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve Naroff} 24156ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve Naroffconst Stmt *BlockExpr::getBody() const { return TheBlock->getBody(); } 24256ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve NaroffStmt *BlockExpr::getBody() { return TheBlock->getBody(); } 24356ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve Naroff 24456ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve Naroff 2455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer// Generic Expression Routines 2475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer//===----------------------------------------------------------------------===// 2485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// hasLocalSideEffect - Return true if this immediate expression has side 2505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// effects, not counting any sub-expressions. 2515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencerbool Expr::hasLocalSideEffect() const { 2525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (getStmtClass()) { 2535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 2545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 2555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ParenExprClass: 2565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return cast<ParenExpr>(this)->getSubExpr()->hasLocalSideEffect(); 2575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperatorClass: { 2585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const UnaryOperator *UO = cast<UnaryOperator>(this); 2595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (UO->getOpcode()) { 2615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: return false; 2625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::PostInc: 2635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::PostDec: 2645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::PreInc: 2655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::PreDec: 2665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; // ++/-- 2675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Deref: 2695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Dereferencing a volatile pointer is a side-effect. 2705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return getType().isVolatileQualified(); 2715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Real: 2725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Imag: 2735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // accessing a piece of a volatile complex is a side-effect. 2745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return UO->getSubExpr()->getType().isVolatileQualified(); 2755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 2765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Extension: 2775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return UO->getSubExpr()->hasLocalSideEffect(); 2785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 2795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 280e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner case BinaryOperatorClass: { 281e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner const BinaryOperator *BinOp = cast<BinaryOperator>(this); 282e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner // Consider comma to have side effects if the LHS and RHS both do. 283e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner if (BinOp->getOpcode() == BinaryOperator::Comma) 284e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner return BinOp->getLHS()->hasLocalSideEffect() && 285e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner BinOp->getRHS()->hasLocalSideEffect(); 286e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner 287e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner return BinOp->isAssignmentOp(); 288e7716e6133e23e4a89248a65a388bc840d8c130cChris Lattner } 289eb14fe839ec24c2ca14e5f094be147a34e3d3339Chris Lattner case CompoundAssignOperatorClass: 2901f683e9cf2e855b32d3fb4b142aa121cd3cf1088Chris Lattner return true; 2915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 292ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian case ConditionalOperatorClass: { 293ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian const ConditionalOperator *Exp = cast<ConditionalOperator>(this); 294ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian return Exp->getCond()->hasLocalSideEffect() 295ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian || (Exp->getLHS() && Exp->getLHS()->hasLocalSideEffect()) 296ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian || (Exp->getRHS() && Exp->getRHS()->hasLocalSideEffect()); 297ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian } 298ab38e4b50268633f037a10841fdfb612513f8d33Fariborz Jahanian 2995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case MemberExprClass: 3005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ArraySubscriptExprClass: 3015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If the base pointer or element is to a volatile pointer/field, accessing 3025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // if is a side effect. 3035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return getType().isVolatileQualified(); 304211f6adf1301a1461015fb6cb08a05f0a35b65f3Eli Friedman 3055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case CallExprClass: 306b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CXXOperatorCallExprClass: 3075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // TODO: check attributes for pure/const. "void foo() { strlen("bar"); }" 3085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // should warn. 3095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 310a9c01021724b9b546d282b8609cbe559734812ecChris Lattner case ObjCMessageExprClass: 311a9c01021724b9b546d282b8609cbe559734812ecChris Lattner return true; 312611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner case StmtExprClass: { 313611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner // Statement exprs don't logically have side effects themselves, but are 314611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner // sometimes used in macros in ways that give them a type that is unused. 315611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner // For example ({ blah; foo(); }) will end up with a type if foo has a type. 316611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner // however, if the result of the stmt expr is dead, we don't want to emit a 317611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner // warning. 318611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt(); 319611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner if (!CS->body_empty()) 320611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner if (const Expr *E = dyn_cast<Expr>(CS->body_back())) 321611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner return E->hasLocalSideEffect(); 322611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner return false; 323611b2eccaf3869f32de51ecc02985426d1c0aaefChris Lattner } 3246eec8e883de118b431e3ead5b1e604a6ac68ff6bDouglas Gregor case CStyleCastExprClass: 325987a14bf5883ef6e5d07f1c83eb6d41a8212a78cArgyrios Kyrtzidis case CXXFunctionalCastExprClass: 3265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If this is a cast to void, check the operand. Otherwise, the result of 3275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the cast is unused. 3285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (getType()->isVoidType()) 3295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return cast<CastExpr>(this)->getSubExpr()->hasLocalSideEffect(); 3305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 33104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner 3324be1f47de20525ad90f02ba8682a7e2cbd3205d1Eli Friedman case ImplicitCastExprClass: 3334be1f47de20525ad90f02ba8682a7e2cbd3205d1Eli Friedman // Check the operand, since implicit casts are inserted by Sema 3344be1f47de20525ad90f02ba8682a7e2cbd3205d1Eli Friedman return cast<ImplicitCastExpr>(this)->getSubExpr()->hasLocalSideEffect(); 3354be1f47de20525ad90f02ba8682a7e2cbd3205d1Eli Friedman 33604421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 33704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return cast<CXXDefaultArgExpr>(this)->getExpr()->hasLocalSideEffect(); 3384c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl 3394c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl case CXXNewExprClass: 3404c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl // FIXME: In theory, there might be new expressions that don't have side 3414c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl // effects (e.g. a placement new with an uninitialized POD). 3424c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl case CXXDeleteExprClass: 3434c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl return true; 3444c5d320a7581f4b80b151630c91cea5727fa9923Sebastian Redl } 3455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 3465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 347ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor/// DeclCanBeLvalue - Determine whether the given declaration can be 348ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor/// an lvalue. This is a helper routine for isLvalue. 349ba7e210a999275695f58be03ef402758cfec3635Douglas Gregorstatic bool DeclCanBeLvalue(const NamedDecl *Decl, ASTContext &Ctx) { 35072c3f314d92d65c050ee1c07b7753623c044d6c7Douglas Gregor // C++ [temp.param]p6: 35172c3f314d92d65c050ee1c07b7753623c044d6c7Douglas Gregor // A non-type non-reference template-parameter is not an lvalue. 35272c3f314d92d65c050ee1c07b7753623c044d6c7Douglas Gregor if (const NonTypeTemplateParmDecl *NTTParm 35372c3f314d92d65c050ee1c07b7753623c044d6c7Douglas Gregor = dyn_cast<NonTypeTemplateParmDecl>(Decl)) 35472c3f314d92d65c050ee1c07b7753623c044d6c7Douglas Gregor return NTTParm->getType()->isReferenceType(); 35572c3f314d92d65c050ee1c07b7753623c044d6c7Douglas Gregor 35644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor return isa<VarDecl>(Decl) || isa<FieldDecl>(Decl) || 357ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor // C++ 3.10p2: An lvalue refers to an object or function. 358ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor (Ctx.getLangOptions().CPlusPlus && 359ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor (isa<FunctionDecl>(Decl) || isa<OverloadedFunctionDecl>(Decl))); 360ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor} 361ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor 3625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or an 3635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// incomplete type other than void. Nonarray expressions that can be lvalues: 3645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - name, where name must be a variable 3655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - e[i] 3665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - (e), where e must be an lvalue 3675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - e.name, where e must be an lvalue 3685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - e->name 3695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - *e, the type of e cannot be a function type 3705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// - string-constant 3717da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner/// - (__real__ e) and (__imag__ e) where e is an lvalue [GNU extension] 37208ad47cbd1f81fcb31dbc731c13b885a07e12704Bill Wendling/// - reference type [C++ [expr]] 3735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 37428be73f74c9e241a23ea24fe5756623de6bf1084Chris LattnerExpr::isLvalueResult Expr::isLvalue(ASTContext &Ctx) const { 37598cd599ee8a9b259ed7388ee2921a20d97658864Douglas Gregor // first, check the type (C99 6.3.2.1). Expressions with function 37698cd599ee8a9b259ed7388ee2921a20d97658864Douglas Gregor // type in C are not lvalues, but they can be lvalues in C++. 37798cd599ee8a9b259ed7388ee2921a20d97658864Douglas Gregor if (!Ctx.getLangOptions().CPlusPlus && TR->isFunctionType()) 3785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return LV_NotObjectType; 3795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 380acb818a4f7d9b608826171094d6b5a555a8fe694Steve Naroff // Allow qualified void which is an incomplete type other than void (yuck). 38128be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner if (TR->isVoidType() && !Ctx.getCanonicalType(TR).getCVRQualifiers()) 382acb818a4f7d9b608826171094d6b5a555a8fe694Steve Naroff return LV_IncompleteVoidType; 383acb818a4f7d9b608826171094d6b5a555a8fe694Steve Naroff 38498cd599ee8a9b259ed7388ee2921a20d97658864Douglas Gregor /// FIXME: Expressions can't have reference type, so the following 38598cd599ee8a9b259ed7388ee2921a20d97658864Douglas Gregor /// isn't needed. 386cb4f9a6d0be445d84af35ba81323be6127816f9eChris Lattner if (TR->isReferenceType()) // C++ [expr] 38708ad47cbd1f81fcb31dbc731c13b885a07e12704Bill Wendling return LV_Valid; 38808ad47cbd1f81fcb31dbc731c13b885a07e12704Bill Wendling 3895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // the type looks fine, now check the expression 3905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (getStmtClass()) { 3915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case StringLiteralClass: // C99 6.5.1p4 3927323a6297edad643c202594dcf3d9a174de96ca6Anders Carlsson return LV_Valid; 3935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ArraySubscriptExprClass: // C99 6.5.3p4 (e1[e2] == (*((e1)+(e2)))) 3945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // For vectors, make sure base is an lvalue (i.e. not a function call). 3955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (cast<ArraySubscriptExpr>(this)->getBase()->getType()->isVectorType()) 39628be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return cast<ArraySubscriptExpr>(this)->getBase()->isLvalue(Ctx); 3975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return LV_Valid; 3984111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner case DeclRefExprClass: { // C99 6.5.1p2 399ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor const NamedDecl *RefdDecl = cast<DeclRefExpr>(this)->getDecl(); 400ba7e210a999275695f58be03ef402758cfec3635Douglas Gregor if (DeclCanBeLvalue(RefdDecl, Ctx)) 4015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return LV_Valid; 4025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 4034111024be81e7c0525e42dadcc126d27e5bf2425Chris Lattner } 404dd972f20dc2bd3609d833893e5c6544ac09b59a9Steve Naroff case BlockDeclRefExprClass: { 405dd972f20dc2bd3609d833893e5c6544ac09b59a9Steve Naroff const BlockDeclRefExpr *BDR = cast<BlockDeclRefExpr>(this); 4064f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff if (isa<VarDecl>(BDR->getDecl())) 407dd972f20dc2bd3609d833893e5c6544ac09b59a9Steve Naroff return LV_Valid; 408dd972f20dc2bd3609d833893e5c6544ac09b59a9Steve Naroff break; 409dd972f20dc2bd3609d833893e5c6544ac09b59a9Steve Naroff } 410fdd75663fffeb2058a7847975e50837e61200593Anton Korobeynikov case MemberExprClass: { // C99 6.5.2.3p4 4115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const MemberExpr *m = cast<MemberExpr>(this); 41228be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return m->isArrow() ? LV_Valid : m->getBase()->isLvalue(Ctx); 413fdd75663fffeb2058a7847975e50837e61200593Anton Korobeynikov } 4147da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner case UnaryOperatorClass: 4155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Deref) 4167da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner return LV_Valid; // C99 6.5.3p4 4177da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner 4187da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Real || 419baf0d6678418e0dd9309438c3e50274253cfc7b2Chris Lattner cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Imag || 420baf0d6678418e0dd9309438c3e50274253cfc7b2Chris Lattner cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Extension) 42128be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return cast<UnaryOperator>(this)->getSubExpr()->isLvalue(Ctx); // GNU. 42274253736184c0717a0649922551bf9d8b6815651Douglas Gregor 42374253736184c0717a0649922551bf9d8b6815651Douglas Gregor if (Ctx.getLangOptions().CPlusPlus && // C++ [expr.pre.incr]p1 42474253736184c0717a0649922551bf9d8b6815651Douglas Gregor (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::PreInc || 42574253736184c0717a0649922551bf9d8b6815651Douglas Gregor cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::PreDec)) 42674253736184c0717a0649922551bf9d8b6815651Douglas Gregor return LV_Valid; 4275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 428eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor case ImplicitCastExprClass: 429eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor return cast<ImplicitCastExpr>(this)->isLvalueCast()? LV_Valid 430eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor : LV_InvalidExpression; 4315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ParenExprClass: // C99 6.5.1p5 43228be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return cast<ParenExpr>(this)->getSubExpr()->isLvalue(Ctx); 433eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor case BinaryOperatorClass: 434eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor case CompoundAssignOperatorClass: { 435eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor const BinaryOperator *BinOp = cast<BinaryOperator>(this); 436337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor 437337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor if (Ctx.getLangOptions().CPlusPlus && // C++ [expr.comma]p1 438337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor BinOp->getOpcode() == BinaryOperator::Comma) 439337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor return BinOp->getRHS()->isLvalue(Ctx); 440337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor 441bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor if (!BinOp->isAssignmentOp()) 442eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor return LV_InvalidExpression; 443eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor 444bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor if (Ctx.getLangOptions().CPlusPlus) 445bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // C++ [expr.ass]p1: 446bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // The result of an assignment operation [...] is an lvalue. 447bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor return LV_Valid; 448bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor 449bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor 450bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // C99 6.5.16: 451bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // An assignment expression [...] is not an lvalue. 452bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor return LV_InvalidExpression; 453eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor } 454b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CallExprClass: 455b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CXXOperatorCallExprClass: { 4569d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // C++ [expr.call]p10: 4579d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // A function call is an lvalue if and only if the result type 4589d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // is a reference. 45927c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor QualType CalleeType = cast<CallExpr>(this)->getCallee()->getType(); 4609d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor if (const PointerType *FnTypePtr = CalleeType->getAsPointerType()) 4619d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor if (const FunctionType *FnType 4629d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor = FnTypePtr->getPointeeType()->getAsFunctionType()) 4639d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor if (FnType->getResultType()->isReferenceType()) 4649d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor return LV_Valid; 4659d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor 4669d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor break; 4679d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor } 468e6386394677ed4f77b20e2e3d5446a3a2f628e53Steve Naroff case CompoundLiteralExprClass: // C99 6.5.2.5p5 469e6386394677ed4f77b20e2e3d5446a3a2f628e53Steve Naroff return LV_Valid; 470213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman case ExtVectorElementExprClass: 471213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman if (cast<ExtVectorElementExpr>(this)->containsDuplicateElements()) 472fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return LV_DuplicateVectorComponents; 473fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return LV_Valid; 474027282d1c1ac151aa7b1b3b45babc918b8ad456aSteve Naroff case ObjCIvarRefExprClass: // ObjC instance variables are lvalues. 475027282d1c1ac151aa7b1b3b45babc918b8ad456aSteve Naroff return LV_Valid; 476799a6a6850af625946bb8d88ca960bb6604e3858Steve Naroff case ObjCPropertyRefExprClass: // FIXME: check if read-only property. 477799a6a6850af625946bb8d88ca960bb6604e3858Steve Naroff return LV_Valid; 4785daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian case ObjCKVCRefExprClass: // FIXME: check if read-only property. 4795daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian return LV_Valid; 480d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris Lattner case PredefinedExprClass: 481796da18402f286b897782a298ae3b20c459c102eDouglas Gregor return LV_Valid; 4829d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case VAArgExprClass: 4839d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor return LV_Valid; 48404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 48528be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return cast<CXXDefaultArgExpr>(this)->getExpr()->isLvalue(Ctx); 48624b41fa8239c63b9eb570d3e83c4a82840656a65Argyrios Kyrtzidis case CXXConditionDeclExprClass: 48724b41fa8239c63b9eb570d3e83c4a82840656a65Argyrios Kyrtzidis return LV_Valid; 4886eec8e883de118b431e3ead5b1e604a6ac68ff6bDouglas Gregor case CStyleCastExprClass: 4899d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXFunctionalCastExprClass: 4909d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXStaticCastExprClass: 4919d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXDynamicCastExprClass: 4929d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXReinterpretCastExprClass: 4939d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXConstCastExprClass: 4949d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // The result of an explicit cast is an lvalue if the type we are 4959d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // casting to is a reference type. See C++ [expr.cast]p1, 4969d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // C++ [expr.static.cast]p2, C++ [expr.dynamic.cast]p2, 4979d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // C++ [expr.reinterpret.cast]p1, C++ [expr.const.cast]p1. 4989d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor if (cast<ExplicitCastExpr>(this)->getTypeAsWritten()->isReferenceType()) 4999d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor return LV_Valid; 5009d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor break; 501c42e1183846228a7fa5143ad76507d6d60f5c6f3Sebastian Redl case CXXTypeidExprClass: 502c42e1183846228a7fa5143ad76507d6d60f5c6f3Sebastian Redl // C++ 5.2.8p1: The result of a typeid expression is an lvalue of ... 503c42e1183846228a7fa5143ad76507d6d60f5c6f3Sebastian Redl return LV_Valid; 5045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 5055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 5065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return LV_InvalidExpression; 5085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, 5115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// does not have an incomplete type, does not have a const-qualified type, and 5125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// if it is a structure or union, does not have any member (including, 5135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// recursively, any member or element of all contained aggregates or unions) 5145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// with a const-qualified type. 51528be73f74c9e241a23ea24fe5756623de6bf1084Chris LattnerExpr::isModifiableLvalueResult Expr::isModifiableLvalue(ASTContext &Ctx) const { 51628be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner isLvalueResult lvalResult = isLvalue(Ctx); 5175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (lvalResult) { 519ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor case LV_Valid: 520ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor // C++ 3.10p11: Functions cannot be modified, but pointers to 521ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor // functions can be modifiable. 522ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor if (Ctx.getLangOptions().CPlusPlus && TR->isFunctionType()) 523ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor return MLV_NotObjectType; 524ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor break; 525ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor 5265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LV_NotObjectType: return MLV_NotObjectType; 5275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LV_IncompleteVoidType: return MLV_IncompleteVoidType; 528fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff case LV_DuplicateVectorComponents: return MLV_DuplicateVectorComponents; 529ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner case LV_InvalidExpression: 530ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // If the top level is a C-style cast, and the subexpression is a valid 531ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // lvalue, then this is probably a use of the old-school "cast as lvalue" 532ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // GCC extension. We don't support it, but we want to produce good 533ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // diagnostics when it happens so that the user knows why. 534ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner if (const CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(this)) 535ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner if (CE->getSubExpr()->isLvalue(Ctx) == LV_Valid) 536ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner return MLV_LValueCast; 537ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner return MLV_InvalidExpression; 5385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 539c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner 540c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType CT = Ctx.getCanonicalType(getType()); 541c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner 542c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (CT.isConstQualified()) 5435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_ConstQualified; 544c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (CT->isArrayType()) 5455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_ArrayType; 546c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (CT->isIncompleteType()) 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_IncompleteType; 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 549c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (const RecordType *r = CT->getAsRecordType()) { 5505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (r->hasConstFields()) 5515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_ConstQualified; 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5534f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // The following is illegal: 5544f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // void takeclosure(void (^C)(void)); 5554f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // void func() { int x = 1; takeclosure(^{ x = 7 }); } 5564f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // 5574f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff if (getStmtClass() == BlockDeclRefExprClass) { 5584f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff const BlockDeclRefExpr *BDR = cast<BlockDeclRefExpr>(this); 5594f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff if (!BDR->isByRef() && isa<VarDecl>(BDR->getDecl())) 5604f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff return MLV_NotBlockQualified; 5614f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff } 5625daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian // Assigning to a readonly property? 5635daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian if (getStmtClass() == ObjCPropertyRefExprClass) { 5645daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian const ObjCPropertyRefExpr* PropExpr = cast<ObjCPropertyRefExpr>(this); 5655daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian if (ObjCPropertyDecl *PDecl = PropExpr->getProperty()) { 56631afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian QualType BaseType = PropExpr->getBase()->getType(); 56731afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian if (const PointerType *PTy = BaseType->getAsPointerType()) 56831afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian if (const ObjCInterfaceType *IFTy = 56931afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian PTy->getPointeeType()->getAsObjCInterfaceType()) 57031afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian if (ObjCInterfaceDecl *IFace = IFTy->getDecl()) 57131afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian if (IFace->isPropertyReadonly(PDecl)) 57231afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian return MLV_ReadonlyProperty; 5735daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian } 5745daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian } 575ba8d2d684e74a20bef03828c21c991d222c7e9e5Fariborz Jahanian // Assigning to an 'implicit' property? 5766669db9d80d77d10f101aa9f8e488bbd2d98f76cFariborz Jahanian else if (getStmtClass() == ObjCKVCRefExprClass) { 577ba8d2d684e74a20bef03828c21c991d222c7e9e5Fariborz Jahanian const ObjCKVCRefExpr* KVCExpr = cast<ObjCKVCRefExpr>(this); 578ba8d2d684e74a20bef03828c21c991d222c7e9e5Fariborz Jahanian if (KVCExpr->getSetterMethod() == 0) 579ba8d2d684e74a20bef03828c21c991d222c7e9e5Fariborz Jahanian return MLV_NoSetterProperty; 580ba8d2d684e74a20bef03828c21c991d222c7e9e5Fariborz Jahanian } 5815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_Valid; 5825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5842e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek/// hasGlobalStorage - Return true if this expression has static storage 5854cc627111453b75519d5130b57e06256da7b00e8Chris Lattner/// duration. This means that the address of this expression is a link-time 5864cc627111453b75519d5130b57e06256da7b00e8Chris Lattner/// constant. 5872e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenekbool Expr::hasGlobalStorage() const { 5881d09ecca892185ba067e47ba879f424de59950efChris Lattner switch (getStmtClass()) { 5891d09ecca892185ba067e47ba879f424de59950efChris Lattner default: 5901d09ecca892185ba067e47ba879f424de59950efChris Lattner return false; 5914cc627111453b75519d5130b57e06256da7b00e8Chris Lattner case ParenExprClass: 5922e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return cast<ParenExpr>(this)->getSubExpr()->hasGlobalStorage(); 5934cc627111453b75519d5130b57e06256da7b00e8Chris Lattner case ImplicitCastExprClass: 5942e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return cast<ImplicitCastExpr>(this)->getSubExpr()->hasGlobalStorage(); 595e9b12198c4cc7f5687960100351b4af006c14469Steve Naroff case CompoundLiteralExprClass: 596e9b12198c4cc7f5687960100351b4af006c14469Steve Naroff return cast<CompoundLiteralExpr>(this)->isFileScope(); 5971d09ecca892185ba067e47ba879f424de59950efChris Lattner case DeclRefExprClass: { 5981d09ecca892185ba067e47ba879f424de59950efChris Lattner const Decl *D = cast<DeclRefExpr>(this)->getDecl(); 5991d09ecca892185ba067e47ba879f424de59950efChris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 6002e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return VD->hasGlobalStorage(); 60163f067f5a75ae97b53dc7a6a6530e2c72c8bb7f8Seo Sanghyeon if (isa<FunctionDecl>(D)) 60263f067f5a75ae97b53dc7a6a6530e2c72c8bb7f8Seo Sanghyeon return true; 6031d09ecca892185ba067e47ba879f424de59950efChris Lattner return false; 6041d09ecca892185ba067e47ba879f424de59950efChris Lattner } 605fb7080663a0f0abd687a6f58ac917d9a76318b73Chris Lattner case MemberExprClass: { 6061d09ecca892185ba067e47ba879f424de59950efChris Lattner const MemberExpr *M = cast<MemberExpr>(this); 6072e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return !M->isArrow() && M->getBase()->hasGlobalStorage(); 608fb7080663a0f0abd687a6f58ac917d9a76318b73Chris Lattner } 6094cc627111453b75519d5130b57e06256da7b00e8Chris Lattner case ArraySubscriptExprClass: 6102e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return cast<ArraySubscriptExpr>(this)->getBase()->hasGlobalStorage(); 611d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris Lattner case PredefinedExprClass: 612fa28b30d5a1e93e5263be33e343532b900d2c643Chris Lattner return true; 61304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 61404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return cast<CXXDefaultArgExpr>(this)->getExpr()->hasGlobalStorage(); 6151d09ecca892185ba067e47ba879f424de59950efChris Lattner } 6161d09ecca892185ba067e47ba879f424de59950efChris Lattner} 6171d09ecca892185ba067e47ba879f424de59950efChris Lattner 6184e99a5fc3b203397a91136c6e695e405fb8fc606Ted KremenekExpr* Expr::IgnoreParens() { 6194e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek Expr* E = this; 6204e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek while (ParenExpr* P = dyn_cast<ParenExpr>(E)) 6214e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek E = P->getSubExpr(); 6224e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek 6234e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek return E; 6244e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek} 6254e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek 62656f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner/// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr 62756f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner/// or CastExprs or ImplicitCastExprs, returning their operand. 62856f349400c5932a196509c0480ff6f99a9a0b48fChris LattnerExpr *Expr::IgnoreParenCasts() { 62956f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner Expr *E = this; 63056f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner while (true) { 63156f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner if (ParenExpr *P = dyn_cast<ParenExpr>(E)) 63256f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner E = P->getSubExpr(); 63356f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner else if (CastExpr *P = dyn_cast<CastExpr>(E)) 63456f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner E = P->getSubExpr(); 63556f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner else 63656f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner return E; 63756f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner } 63856f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner} 63956f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner 640898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor/// hasAnyTypeDependentArguments - Determines if any of the expressions 641898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor/// in Exprs is type-dependent. 642898574e7496ba8fd76290079d3a9d06954992734Douglas Gregorbool Expr::hasAnyTypeDependentArguments(Expr** Exprs, unsigned NumExprs) { 643898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor for (unsigned I = 0; I < NumExprs; ++I) 644898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (Exprs[I]->isTypeDependent()) 645898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor return true; 646898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 647898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor return false; 648898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor} 649898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 650898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor/// hasAnyValueDependentArguments - Determines if any of the expressions 651898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor/// in Exprs is value-dependent. 652898574e7496ba8fd76290079d3a9d06954992734Douglas Gregorbool Expr::hasAnyValueDependentArguments(Expr** Exprs, unsigned NumExprs) { 653898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor for (unsigned I = 0; I < NumExprs; ++I) 654898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (Exprs[I]->isValueDependent()) 655898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor return true; 656898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 657898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor return false; 658898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor} 659898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 66038374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroffbool Expr::isConstantExpr(ASTContext &Ctx, SourceLocation *Loc) const { 661e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson switch (getStmtClass()) { 662e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson default: 663e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson if (!isEvaluatable(Ctx)) { 664e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson if (Loc) *Loc = getLocStart(); 665e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson return false; 666e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson } 667e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson break; 668e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson case StringLiteralClass: 669e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson return true; 670e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson case InitListExprClass: { 671e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson const InitListExpr *Exp = cast<InitListExpr>(this); 672e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson unsigned numInits = Exp->getNumInits(); 673e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson for (unsigned i = 0; i < numInits; i++) { 674e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson if (!Exp->getInit(i)->isConstantExpr(Ctx, Loc)) 675e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson return false; 676e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson } 677e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson } 678e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson } 679e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson 680e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson return true; 68138374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff} 68238374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff 6835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// isIntegerConstantExpr - this recursive routine will test if an expression is 6845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// an integer constant expression. Note: With the introduction of VLA's in 6855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// C99 the result of the sizeof operator is no longer always a constant 6865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// expression. The generalization of the wording to include any subexpression 6875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that is not evaluated (C99 6.6p3) means that nonconstant subexpressions 6885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// can appear as operands to other operators (e.g. &&, ||, ?:). For instance, 6895f6b632391e24b08ead3e62ba2e2765e770382edNuno Lopes/// "0 || f()" can be treated as a constant expression. In C90 this expression, 6905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// occurring in a context requiring a constant, would have been a constraint 6915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// violation. FIXME: This routine currently implements C90 semantics. 6925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// To properly implement C99 semantics this routine will need to evaluate 6935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// expressions involving operators previously mentioned. 6945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// FIXME: Pass up a reason why! Invalid operation in i-c-e, division by zero, 6965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// comma, etc 6975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 6985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// FIXME: This should ext-warn on overflow during evaluation! ISO C does not 699ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner/// permit this. This includes things like (int)1e1000 700ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// 701ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// FIXME: Handle offsetof. Two things to do: Handle GCC's __builtin_offsetof 702ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// to support gcc 4.0+ and handle the idiom GCC recognizes with a null pointer 703ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// cast+dereference. 704590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattnerbool Expr::isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 705590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner SourceLocation *Loc, bool isEvaluated) const { 706a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // Pretest for integral type; some parts of the code crash for types that 707a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // can't be sized. 708a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!getType()->isIntegralType()) { 709a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (Loc) *Loc = getLocStart(); 710a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 711a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 7125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (getStmtClass()) { 7135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 7145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 7155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 7165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ParenExprClass: 7175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return cast<ParenExpr>(this)->getSubExpr()-> 718590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated); 7195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case IntegerLiteralClass: 7205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = cast<IntegerLiteral>(this)->getValue(); 7215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 7222eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner case CharacterLiteralClass: { 7232eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner const CharacterLiteral *CL = cast<CharacterLiteral>(this); 72498be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 7252eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner Result = CL->getValue(); 726f0fbcb356bc4eb5f6467dc4fc4bc447e9a630102Chris Lattner Result.setIsUnsigned(!getType()->isSignedIntegerType()); 7275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 7282eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner } 729b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson case CXXBoolLiteralExprClass: { 730b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson const CXXBoolLiteralExpr *BL = cast<CXXBoolLiteralExpr>(this); 731b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 732b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson Result = BL->getValue(); 733b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson Result.setIsUnsigned(!getType()->isSignedIntegerType()); 734b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson break; 735b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson } 7367267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis case CXXZeroInitValueExprClass: 7377267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis Result.clear(); 7387267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis break; 7397b658aa315784fa489a32daeacfe400512ce468dSteve Naroff case TypesCompatibleExprClass: { 7407b658aa315784fa489a32daeacfe400512ce468dSteve Naroff const TypesCompatibleExpr *TCE = cast<TypesCompatibleExpr>(this); 74198be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 742ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // Per gcc docs "this built-in function ignores top level 743ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // qualifiers". We need to use the canonical version to properly 744ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // be able to strip CRV qualifiers from the type. 745ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T0 = Ctx.getCanonicalType(TCE->getArgType1()); 746ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T1 = Ctx.getCanonicalType(TCE->getArgType2()); 747ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar Result = Ctx.typesAreCompatible(T0.getUnqualifiedType(), 748ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar T1.getUnqualifiedType()); 749389cecc83f33e93c8ba6bf2e8269b8690404416fSteve Naroff break; 7507b658aa315784fa489a32daeacfe400512ce468dSteve Naroff } 751b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CallExprClass: 752b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CXXOperatorCallExprClass: { 75313b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff const CallExpr *CE = cast<CallExpr>(this); 75498be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 755a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 756a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // If this is a call to a builtin function, constant fold it otherwise 757a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // reject it. 758a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (CE->isBuiltinCall()) { 759a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner APValue ResultAP; 7606ee7aa154e8bbb21a21254293410b944f78b0bfeChris Lattner if (CE->Evaluate(ResultAP, Ctx)) { 761a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner Result = ResultAP.getInt(); 762a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner break; // It is a constant, expand it. 763a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner } 764a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner } 765a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 76613b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff if (Loc) *Loc = getLocStart(); 76713b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff return false; 76813b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff } 7695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclRefExprClass: 7705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (const EnumConstantDecl *D = 7715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer dyn_cast<EnumConstantDecl>(cast<DeclRefExpr>(this)->getDecl())) { 7725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = D->getInitVal(); 7735f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 7745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 7755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 7765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 7775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperatorClass: { 7785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const UnaryOperator *Exp = cast<UnaryOperator>(this); 7795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7800518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // Get the operand value. If this is offsetof, do not evalute the 7815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // operand. This affects C99 6.6p3. 7820518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (!Exp->isOffsetOfOp() && !Exp->getSubExpr()-> 7830518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 7845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 7855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Exp->getOpcode()) { 7875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 7885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // See C99 6.6p3. 7895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 7905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = Exp->getOperatorLoc(); 7915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 7925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Extension: 79376e773a443be9f006610f46529e07d4c8d857680Chris Lattner return true; // FIXME: this is wrong. 7945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::LNot: { 795bf7553889594886213e05cd3f94a6d6f7747bf7bChris Lattner bool Val = Result == 0; 79698be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 7975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = Val; 7985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 7995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Plus: 8015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Minus: 8035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = -Result; 8045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Not: 8065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = ~Result; 8075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8085a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson case UnaryOperator::OffsetOf: 809aa1f9f1d50adf294674b74510b62e863b68572bcDaniel Dunbar Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 8105a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson Result = Exp->evaluateOffsetOf(Ctx); 8115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8140518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl case SizeOfAlignOfExprClass: { 8150518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl const SizeOfAlignOfExpr *Exp = cast<SizeOfAlignOfExpr>(this); 816a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner 817a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner // Return the result in the right width. 81898be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 819a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner 8200518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType ArgTy = Exp->getTypeOfArgument(); 821a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner // sizeof(void) and __alignof__(void) = 1 as a gcc extension. 8220518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (ArgTy->isVoidType()) { 823a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner Result = 1; 824a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner break; 825a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner } 826a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner 827a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner // alignof always evaluates to a constant, sizeof does if arg is not VLA. 8280518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (Exp->isSizeOf() && !ArgTy->isConstantSizeType()) { 82965383479cb2caf0f136f58fecdbdbaf9c497b7a1Chris Lattner if (Loc) *Loc = Exp->getOperatorLoc(); 8305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 83165383479cb2caf0f136f58fecdbdbaf9c497b7a1Chris Lattner } 8325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 83376e773a443be9f006610f46529e07d4c8d857680Chris Lattner // Get information about the size or align. 8340518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (ArgTy->isFunctionType()) { 835efdd1574e3cca00ef0410aee8b7ee36eda5a2f71Chris Lattner // GCC extension: sizeof(function) = 1. 836efdd1574e3cca00ef0410aee8b7ee36eda5a2f71Chris Lattner Result = Exp->isSizeOf() ? 1 : 4; 8376a24acbb3dbb3bea9426716bee6ad6023ad15f3fAnders Carlsson } else { 83898be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharSize = Ctx.Target.getCharWidth(); 8396a24acbb3dbb3bea9426716bee6ad6023ad15f3fAnders Carlsson if (Exp->isSizeOf()) 8400518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl Result = Ctx.getTypeSize(ArgTy) / CharSize; 8416a24acbb3dbb3bea9426716bee6ad6023ad15f3fAnders Carlsson else 8420518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl Result = Ctx.getTypeAlign(ArgTy) / CharSize; 843060e470e53b73167114284eb0b8c3e25bb3dad99Ted Kremenek } 8445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperatorClass: { 8475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const BinaryOperator *Exp = cast<BinaryOperator>(this); 848e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar llvm::APSInt LHS, RHS; 849e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar 850e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar // Initialize result to have correct signedness and width. 851e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = llvm::APSInt(static_cast<uint32_t>(Ctx.getTypeSize(getType())), 852b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman !getType()->isSignedIntegerType()); 853b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman 8545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The LHS of a constant expr is always evaluated and needed. 855e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar if (!Exp->getLHS()->isIntegerConstantExpr(LHS, Ctx, Loc, isEvaluated)) 8565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The short-circuiting &&/|| operators don't necessarily evaluate their 8595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // RHS. Make sure to pass isEvaluated down correctly. 8605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Exp->isLogicalOp()) { 8615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool RHSEval; 8625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Exp->getOpcode() == BinaryOperator::LAnd) 863e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar RHSEval = LHS != 0; 8645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else { 8655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(Exp->getOpcode() == BinaryOperator::LOr &&"Unexpected logical"); 866e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar RHSEval = LHS == 0; 8675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 869590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner if (!Exp->getRHS()->isIntegerConstantExpr(RHS, Ctx, Loc, 8705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isEvaluated & RHSEval)) 8715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8725f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 873590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner if (!Exp->getRHS()->isIntegerConstantExpr(RHS, Ctx, Loc, isEvaluated)) 8745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Exp->getOpcode()) { 8785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 8795f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 8805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Mul: 882e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS * RHS; 8835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Div: 8855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (RHS == 0) { 8865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isEvaluated) break; 8875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 8885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 890e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS / RHS; 8915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Rem: 8935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (RHS == 0) { 8945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isEvaluated) break; 8955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 8965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 898e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS % RHS; 8995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 900e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Add: Result = LHS + RHS; break; 901e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Sub: Result = LHS - RHS; break; 9025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Shl: 903e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS << 904e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar static_cast<uint32_t>(RHS.getLimitedValue(LHS.getBitWidth()-1)); 905e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar break; 9065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Shr: 907e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS >> 908e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar static_cast<uint32_t>(RHS.getLimitedValue(LHS.getBitWidth()-1)); 9095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 910e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::LT: Result = LHS < RHS; break; 911e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::GT: Result = LHS > RHS; break; 912e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::LE: Result = LHS <= RHS; break; 913e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::GE: Result = LHS >= RHS; break; 914e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::EQ: Result = LHS == RHS; break; 915e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::NE: Result = LHS != RHS; break; 916e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::And: Result = LHS & RHS; break; 917e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Xor: Result = LHS ^ RHS; break; 918e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Or: Result = LHS | RHS; break; 9195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::LAnd: 920e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS != 0 && RHS != 0; 9215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 9225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::LOr: 923e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS != 0 || RHS != 0; 9245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 925b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman 926b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman case BinaryOperator::Comma: 927b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // C99 6.6p3: "shall not contain assignment, ..., or comma operators, 928b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // *except* when they are contained within a subexpression that is not 929b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // evaluated". Note that Assignment can never happen due to constraints 930b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // on the LHS subexpr, so we don't need to check it here. 931b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman if (isEvaluated) { 932b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman if (Loc) *Loc = getLocStart(); 933b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman return false; 934b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 935b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman 936b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // The result of the constant expr is the RHS. 937b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman Result = RHS; 938b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman return true; 9395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 9405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(!Exp->isAssignmentOp() && "LHS can't be a constant expr!"); 9425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 9435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 94426dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner case ImplicitCastExprClass: 9456eec8e883de118b431e3ead5b1e604a6ac68ff6bDouglas Gregor case CStyleCastExprClass: 946987a14bf5883ef6e5d07f1c83eb6d41a8212a78cArgyrios Kyrtzidis case CXXFunctionalCastExprClass: { 9470835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis const Expr *SubExpr = cast<CastExpr>(this)->getSubExpr(); 9480835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis SourceLocation CastLoc = getLocStart(); 94926dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner 9505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.6p6: shall only convert arithmetic types to integer types. 95126dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (!SubExpr->getType()->isArithmeticType() || 95226dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner !getType()->isIntegerType()) { 95326dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (Loc) *Loc = SubExpr->getLocStart(); 9545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 956987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner 95798be4943e8dc4f3905629a7102668960873cf863Chris Lattner uint32_t DestWidth = static_cast<uint32_t>(Ctx.getTypeSize(getType())); 958987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner 9595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle simple integer->integer casts. 96026dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (SubExpr->getType()->isIntegerType()) { 96126dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (!SubExpr->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 9625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 96326dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner 96426dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner // Figure out if this is a truncate, extend or noop cast. 96526dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner // If the input is signed, do a sign extend, noop, or truncate. 966c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner if (getType()->isBooleanType()) { 967c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner // Conversion to bool compares against zero. 968c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result = Result != 0; 969c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result.zextOrTrunc(DestWidth); 970c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner } else if (SubExpr->getType()->isSignedIntegerType()) 97126dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner Result.sextOrTrunc(DestWidth); 97226dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner else // If the input is unsigned, do a zero extend, noop, or truncate. 97326dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner Result.zextOrTrunc(DestWidth); 9745f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 9755f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 9765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Allow floating constants that are the immediate operands of casts or that 9785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // are parenthesized. 97926dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner const Expr *Operand = SubExpr; 9805f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (const ParenExpr *PE = dyn_cast<ParenExpr>(Operand)) 9815f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Operand = PE->getSubExpr(); 982987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner 983987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner // If this isn't a floating literal, we can't handle it. 984987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner const FloatingLiteral *FL = dyn_cast<FloatingLiteral>(Operand); 985987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner if (!FL) { 986987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner if (Loc) *Loc = Operand->getLocStart(); 987987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner return false; 988987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner } 989c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner 990c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner // If the destination is boolean, compare against zero. 991c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner if (getType()->isBooleanType()) { 992c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result = !FL->getValue().isZero(); 993c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result.zextOrTrunc(DestWidth); 994c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner break; 995c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner } 9965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 997987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner // Determine whether we are converting to unsigned or signed. 998987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner bool DestSigned = getType()->isSignedIntegerType(); 999ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner 1000ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner // TODO: Warn on overflow, but probably not here: isIntegerConstantExpr can 1001ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner // be called multiple times per AST. 1002ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen uint64_t Space[4]; 1003ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen bool ignored; 1004ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner (void)FL->getValue().convertToInteger(Space, DestWidth, DestSigned, 1005ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen llvm::APFloat::rmTowardZero, 1006ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen &ignored); 1007987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner Result = llvm::APInt(DestWidth, 4, Space); 1008987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner break; 10095f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ConditionalOperatorClass: { 10115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const ConditionalOperator *Exp = cast<ConditionalOperator>(this); 10125f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1013590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner if (!Exp->getCond()->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 10145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 10155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const Expr *TrueExp = Exp->getLHS(); 10175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const Expr *FalseExp = Exp->getRHS(); 10185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Result == 0) std::swap(TrueExp, FalseExp); 10195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Evaluate the false one first, discard the result. 10213907323dd6665c0c4e383435cb145233f4533406Anders Carlsson if (FalseExp && !FalseExp->isIntegerConstantExpr(Result, Ctx, Loc, false)) 10225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 10235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Evalute the true one, capture the result. 10243907323dd6665c0c4e383435cb145233f4533406Anders Carlsson if (TrueExp && 10253907323dd6665c0c4e383435cb145233f4533406Anders Carlsson !TrueExp->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 10265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 10275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 10285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 102904421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 103004421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return cast<CXXDefaultArgExpr>(this) 103104421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner ->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated); 10325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Cases that are valid constant exprs fall through to here. 10355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result.setIsUnsigned(getType()->isUnsignedIntegerType()); 10365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 10375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 10385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an 10405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer constant expression with the value zero, or if this is one that is 10415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// cast to void*. 1042efa9b3877ef298bcb792600ac33521827e1f7fafAnders Carlssonbool Expr::isNullPointerConstant(ASTContext &Ctx) const 1043efa9b3877ef298bcb792600ac33521827e1f7fafAnders Carlsson{ 10440777972d38a3125efed962b045704c30ae6965cfSebastian Redl // Strip off a cast to void*, if it exists. Except in C++. 10450835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) { 10466215dee86c0e715b9f2b0d401ab2a5fcf629f1afSebastian Redl if (!Ctx.getLangOptions().CPlusPlus) { 10470777972d38a3125efed962b045704c30ae6965cfSebastian Redl // Check that it is a cast to void*. 10480777972d38a3125efed962b045704c30ae6965cfSebastian Redl if (const PointerType *PT = CE->getType()->getAsPointerType()) { 10490777972d38a3125efed962b045704c30ae6965cfSebastian Redl QualType Pointee = PT->getPointeeType(); 10500777972d38a3125efed962b045704c30ae6965cfSebastian Redl if (Pointee.getCVRQualifiers() == 0 && 10510777972d38a3125efed962b045704c30ae6965cfSebastian Redl Pointee->isVoidType() && // to void* 10520777972d38a3125efed962b045704c30ae6965cfSebastian Redl CE->getSubExpr()->getType()->isIntegerType()) // from int. 1053d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson return CE->getSubExpr()->isNullPointerConstant(Ctx); 10540777972d38a3125efed962b045704c30ae6965cfSebastian Redl } 10555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1056aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) { 1057aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // Ignore the ImplicitCastExpr type entirely. 1058d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson return ICE->getSubExpr()->isNullPointerConstant(Ctx); 1059aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) { 1060aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // Accept ((void*)0) as a null pointer constant, as many other 1061aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // implementations do. 1062d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson return PE->getSubExpr()->isNullPointerConstant(Ctx); 10638123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner } else if (const CXXDefaultArgExpr *DefaultArg 10648123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner = dyn_cast<CXXDefaultArgExpr>(this)) { 106504421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // See through default argument expressions 1066d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson return DefaultArg->getExpr()->isNullPointerConstant(Ctx); 10672d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor } else if (isa<GNUNullExpr>(this)) { 10682d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor // The GNU __null extension is always a null pointer constant. 10692d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor return true; 1070aaffbf7c790a324ed114184db771aae2d2e9151cSteve Naroff } 10712d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor 1072aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // This expression must be an integer type. 1073aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff if (!getType()->isIntegerType()) 1074aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff return false; 1075aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff 10765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we have an integer constant expression, we need to *evaluate* it and 10775f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // test for the value 0. 1078d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson // FIXME: We should probably return false if we're compiling in strict mode 1079d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson // and Diag is not null (this indicates that the value was foldable but not 1080d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson // an ICE. 1081d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson EvalResult Result; 1082efa9b3877ef298bcb792600ac33521827e1f7fafAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects && 1083d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson Result.Val.isInt() && Result.Val.getInt() == 0; 10845f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 108531a458462c6cf417a84e0c47852b18fb22d79acbSteve Naroff 108627c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// isBitField - Return true if this expression is a bit-field. 108727c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregorbool Expr::isBitField() { 108827c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor Expr *E = this->IgnoreParenCasts(); 108927c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E)) 109027c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor return MemRef->getMemberDecl()->isBitField(); 109127c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor return false; 109227c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor} 109327c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor 1094213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begemanunsigned ExtVectorElementExpr::getNumElements() const { 10958a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman if (const VectorType *VT = getType()->getAsVectorType()) 10968a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman return VT->getNumElements(); 10978a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman return 1; 10984d0ac88428b3ed7c6f3a2f4e758ea5424ecd70aeChris Lattner} 10994d0ac88428b3ed7c6f3a2f4e758ea5424ecd70aeChris Lattner 11008a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman/// containsDuplicateElements - Return true if any element access is repeated. 1101213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begemanbool ExtVectorElementExpr::containsDuplicateElements() const { 1102fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff const char *compStr = Accessor.getName(); 11037e3e9b152e06edf329ceb32190d3255f248d4d5fChris Lattner unsigned length = Accessor.getLength(); 1104fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff 11057e3e9b152e06edf329ceb32190d3255f248d4d5fChris Lattner for (unsigned i = 0; i != length-1; i++) { 1106fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff const char *s = compStr+i; 1107fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff for (const char c = *s++; *s; s++) 1108fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff if (c == *s) 1109fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return true; 1110fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff } 1111fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return false; 1112fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff} 1113b8f849da3cedee2f61ad98389115ddd04e439d60Chris Lattner 11148a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman/// getEncodedElementAccess - We encode the fields as a llvm ConstantArray. 11153b8d116703db8018f855cbb4733ace426422623bNate Begemanvoid ExtVectorElementExpr::getEncodedElementAccess( 11163b8d116703db8018f855cbb4733ace426422623bNate Begeman llvm::SmallVectorImpl<unsigned> &Elts) const { 111792e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isHi = Accessor.isStr("hi"); 111892e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isLo = Accessor.isStr("lo"); 111992e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isEven = Accessor.isStr("e"); 112092e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isOdd = Accessor.isStr("o"); 11218a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman 11227e3e9b152e06edf329ceb32190d3255f248d4d5fChris Lattner const char *compStr = Accessor.getName(); 11238a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman for (unsigned i = 0, e = getNumElements(); i != e; ++i) { 11248a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman uint64_t Index; 11258a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman 11268a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman if (isHi) 11278a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = e + i; 11288a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else if (isLo) 11298a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = i; 11308a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else if (isEven) 11318a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = 2 * i; 11328a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else if (isOdd) 11338a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = 2 * i + 1; 11348a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else 11358a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = ExtVectorType::getAccessorIdx(compStr[i]); 1136b8f849da3cedee2f61ad98389115ddd04e439d60Chris Lattner 11373b8d116703db8018f855cbb4733ace426422623bNate Begeman Elts.push_back(Index); 1138b8f849da3cedee2f61ad98389115ddd04e439d60Chris Lattner } 11398a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman} 11408a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman 114168d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff// constructor for instance messages. 1142bcfb06ac6da1aa3c74ac1ef7a49c2807522366e7Steve NaroffObjCMessageExpr::ObjCMessageExpr(Expr *receiver, Selector selInfo, 1143a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek QualType retType, ObjCMethodDecl *mproto, 1144db611d556f71f98b66b69514d45958d76e5727abSteve Naroff SourceLocation LBrac, SourceLocation RBrac, 114549f109c786f99eb7468dac3976db083a65493444Steve Naroff Expr **ArgExprs, unsigned nargs) 1146db611d556f71f98b66b69514d45958d76e5727abSteve Naroff : Expr(ObjCMessageExprClass, retType), SelName(selInfo), 1147ea958e57a370b641c5a69347b75e9f8e3b5a41a2Ted Kremenek MethodProto(mproto) { 114849f109c786f99eb7468dac3976db083a65493444Steve Naroff NumArgs = nargs; 11495549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek SubExprs = new Stmt*[NumArgs+1]; 115068d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff SubExprs[RECEIVER] = receiver; 115149f109c786f99eb7468dac3976db083a65493444Steve Naroff if (NumArgs) { 115249f109c786f99eb7468dac3976db083a65493444Steve Naroff for (unsigned i = 0; i != NumArgs; ++i) 115368d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); 115468d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff } 1155563477da25f824e37c535131695dc4dc9b68c465Steve Naroff LBracloc = LBrac; 1156563477da25f824e37c535131695dc4dc9b68c465Steve Naroff RBracloc = RBrac; 1157563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1158563477da25f824e37c535131695dc4dc9b68c465Steve Naroff 115968d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff// constructor for class messages. 116068d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff// FIXME: clsName should be typed to ObjCInterfaceType 1161bcfb06ac6da1aa3c74ac1ef7a49c2807522366e7Steve NaroffObjCMessageExpr::ObjCMessageExpr(IdentifierInfo *clsName, Selector selInfo, 1162a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek QualType retType, ObjCMethodDecl *mproto, 1163db611d556f71f98b66b69514d45958d76e5727abSteve Naroff SourceLocation LBrac, SourceLocation RBrac, 116449f109c786f99eb7468dac3976db083a65493444Steve Naroff Expr **ArgExprs, unsigned nargs) 1165db611d556f71f98b66b69514d45958d76e5727abSteve Naroff : Expr(ObjCMessageExprClass, retType), SelName(selInfo), 1166ea958e57a370b641c5a69347b75e9f8e3b5a41a2Ted Kremenek MethodProto(mproto) { 116749f109c786f99eb7468dac3976db083a65493444Steve Naroff NumArgs = nargs; 11685549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek SubExprs = new Stmt*[NumArgs+1]; 11694df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs[RECEIVER] = (Expr*) ((uintptr_t) clsName | IsClsMethDeclUnknown); 117049f109c786f99eb7468dac3976db083a65493444Steve Naroff if (NumArgs) { 117149f109c786f99eb7468dac3976db083a65493444Steve Naroff for (unsigned i = 0; i != NumArgs; ++i) 117268d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); 117368d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff } 1174563477da25f824e37c535131695dc4dc9b68c465Steve Naroff LBracloc = LBrac; 1175563477da25f824e37c535131695dc4dc9b68c465Steve Naroff RBracloc = RBrac; 1176563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1177563477da25f824e37c535131695dc4dc9b68c465Steve Naroff 11784df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek// constructor for class messages. 11794df728e368fa1f65ffc57572fed613dcca5b4fe8Ted KremenekObjCMessageExpr::ObjCMessageExpr(ObjCInterfaceDecl *cls, Selector selInfo, 11804df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek QualType retType, ObjCMethodDecl *mproto, 11814df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SourceLocation LBrac, SourceLocation RBrac, 11824df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek Expr **ArgExprs, unsigned nargs) 11834df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek: Expr(ObjCMessageExprClass, retType), SelName(selInfo), 11844df728e368fa1f65ffc57572fed613dcca5b4fe8Ted KremenekMethodProto(mproto) { 11854df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek NumArgs = nargs; 11864df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs = new Stmt*[NumArgs+1]; 11874df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs[RECEIVER] = (Expr*) ((uintptr_t) cls | IsClsMethDeclKnown); 11884df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek if (NumArgs) { 11894df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek for (unsigned i = 0; i != NumArgs; ++i) 11904df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); 11914df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek } 11924df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek LBracloc = LBrac; 11934df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek RBracloc = RBrac; 11944df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek} 11954df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek 11964df728e368fa1f65ffc57572fed613dcca5b4fe8Ted KremenekObjCMessageExpr::ClassInfo ObjCMessageExpr::getClassInfo() const { 11974df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek uintptr_t x = (uintptr_t) SubExprs[RECEIVER]; 11984df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek switch (x & Flags) { 11994df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek default: 12004df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek assert(false && "Invalid ObjCMessageExpr."); 12014df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek case IsInstMeth: 12024df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek return ClassInfo(0, 0); 12034df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek case IsClsMethDeclUnknown: 12044df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek return ClassInfo(0, (IdentifierInfo*) (x & ~Flags)); 12054df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek case IsClsMethDeclKnown: { 12064df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek ObjCInterfaceDecl* D = (ObjCInterfaceDecl*) (x & ~Flags); 12074df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek return ClassInfo(D, D->getIdentifier()); 12084df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek } 12094df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek } 12104df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek} 12114df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek 121227437caadea35f84d550cd29f024fcf3ea240eecChris Lattnerbool ChooseExpr::isConditionTrue(ASTContext &C) const { 121332442bbc98bafa512fa42d46fedf60ed7d79f574Daniel Dunbar return getCond()->getIntegerConstantExprValue(C) != 0; 121427437caadea35f84d550cd29f024fcf3ea240eecChris Lattner} 121527437caadea35f84d550cd29f024fcf3ea240eecChris Lattner 12165a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlssonstatic int64_t evaluateOffsetOf(ASTContext& C, const Expr *E) 12175a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson{ 12185a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { 12195a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson QualType Ty = ME->getBase()->getType(); 12205a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 12215a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson RecordDecl *RD = Ty->getAsRecordType()->getDecl(); 122298be4943e8dc4f3905629a7102668960873cf863Chris Lattner const ASTRecordLayout &RL = C.getASTRecordLayout(RD); 12235a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson FieldDecl *FD = ME->getMemberDecl(); 12245a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 122544b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // FIXME: This is linear time. And the fact that we're indexing 122644b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // into the layout by position in the record means that we're 122744b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // either stuck numbering the fields in the AST or we have to keep 122844b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor // the linear search (yuck and yuck). 122944b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor unsigned i = 0; 123044b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor for (RecordDecl::field_iterator Field = RD->field_begin(), 123144b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor FieldEnd = RD->field_end(); 123244b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor Field != FieldEnd; (void)++Field, ++i) { 123344b4321feab46299d3f5cfd404680884752a0fcfDouglas Gregor if (*Field == FD) 12345a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson break; 12355a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson } 12365a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 12375a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson return RL.getFieldOffset(i) + evaluateOffsetOf(C, ME->getBase()); 12385a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson } else if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) { 12395a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson const Expr *Base = ASE->getBase(); 12405a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 124198be4943e8dc4f3905629a7102668960873cf863Chris Lattner int64_t size = C.getTypeSize(ASE->getType()); 124232442bbc98bafa512fa42d46fedf60ed7d79f574Daniel Dunbar size *= ASE->getIdx()->getIntegerConstantExprValue(C).getSExtValue(); 12435a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 12445a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson return size + evaluateOffsetOf(C, Base); 12455a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson } else if (isa<CompoundLiteralExpr>(E)) 12465a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson return 0; 12475a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 12485a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson assert(0 && "Unknown offsetof subexpression!"); 12495a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson return 0; 12505a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson} 12515a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 12525a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlssonint64_t UnaryOperator::evaluateOffsetOf(ASTContext& C) const 12535a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson{ 12545a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson assert(Opc == OffsetOf && "Unary operator not offsetof!"); 12555a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 125698be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharSize = C.Target.getCharWidth(); 12575549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return ::evaluateOffsetOf(C, cast<Expr>(Val)) / CharSize; 12585a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson} 12595a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 12600518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redlvoid SizeOfAlignOfExpr::Destroy(ASTContext& C) { 12610518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // Override default behavior of traversing children. If this has a type 12620518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // operand and the type is a variable-length array, the child iteration 12630518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // will iterate over the size expression. However, this expression belongs 12640518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // to the type, not to this, so we don't want to delete it. 12650518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // We still want to delete this expression. 12660518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // FIXME: Same as in Stmt::Destroy - will be eventually in ASTContext's 12670518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // pool allocator. 12680518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (isArgumentType()) 12690518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl delete this; 12700518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl else 12710518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl Expr::Destroy(C); 12729048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar} 12739048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar 127477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek//===----------------------------------------------------------------------===// 1275ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek// ExprIterator. 1276ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek//===----------------------------------------------------------------------===// 1277ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek 1278ce2fc3a343ea6098a96d587071cee7299f11957aTed KremenekExpr* ExprIterator::operator[](size_t idx) { return cast<Expr>(I[idx]); } 1279ce2fc3a343ea6098a96d587071cee7299f11957aTed KremenekExpr* ExprIterator::operator*() const { return cast<Expr>(*I); } 1280ce2fc3a343ea6098a96d587071cee7299f11957aTed KremenekExpr* ExprIterator::operator->() const { return cast<Expr>(*I); } 1281ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenekconst Expr* ConstExprIterator::operator[](size_t idx) const { 1282ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek return cast<Expr>(I[idx]); 1283ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek} 1284ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenekconst Expr* ConstExprIterator::operator*() const { return cast<Expr>(*I); } 1285ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenekconst Expr* ConstExprIterator::operator->() const { return cast<Expr>(*I); } 1286ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek 1287ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek//===----------------------------------------------------------------------===// 128877ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// Child Iterators for iterating over subexpressions/substatements 128977ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek//===----------------------------------------------------------------------===// 129077ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 129177ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// DeclRefExpr 12929ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator DeclRefExpr::child_begin() { return child_iterator(); } 12939ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator DeclRefExpr::child_end() { return child_iterator(); } 129477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 12957779db42c94405ecbd6ee45efb293483fa6cbeffSteve Naroff// ObjCIvarRefExpr 12965549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCIvarRefExpr::child_begin() { return &Base; } 12975549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCIvarRefExpr::child_end() { return &Base+1; } 12987779db42c94405ecbd6ee45efb293483fa6cbeffSteve Naroff 1299e3e9add4fd788927df6f545570e7838db59c01d7Steve Naroff// ObjCPropertyRefExpr 13005549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCPropertyRefExpr::child_begin() { return &Base; } 13015549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCPropertyRefExpr::child_end() { return &Base+1; } 1302ae7840776d6cd31b4d7a4a345b61bcbb3744df6cSteve Naroff 13035daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian// ObjCKVCRefExpr 13045daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz JahanianStmt::child_iterator ObjCKVCRefExpr::child_begin() { return &Base; } 13055daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz JahanianStmt::child_iterator ObjCKVCRefExpr::child_end() { return &Base+1; } 13065daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 1307cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas Gregor// ObjCSuperExpr 1308cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas GregorStmt::child_iterator ObjCSuperExpr::child_begin() { return child_iterator(); } 1309cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas GregorStmt::child_iterator ObjCSuperExpr::child_end() { return child_iterator(); } 1310cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas Gregor 1311d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris Lattner// PredefinedExpr 1312d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris LattnerStmt::child_iterator PredefinedExpr::child_begin() { return child_iterator(); } 1313d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris LattnerStmt::child_iterator PredefinedExpr::child_end() { return child_iterator(); } 131477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 131577ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// IntegerLiteral 13169ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator IntegerLiteral::child_begin() { return child_iterator(); } 13179ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator IntegerLiteral::child_end() { return child_iterator(); } 131877ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 131977ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// CharacterLiteral 13209ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator CharacterLiteral::child_begin() { return child_iterator(); } 13219ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator CharacterLiteral::child_end() { return child_iterator(); } 132277ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 132377ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// FloatingLiteral 13249ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator FloatingLiteral::child_begin() { return child_iterator(); } 13259ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator FloatingLiteral::child_end() { return child_iterator(); } 132677ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 13275d66145eed1c319df5a69977cb8ff74f597ea544Chris Lattner// ImaginaryLiteral 13285549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ImaginaryLiteral::child_begin() { return &Val; } 13295549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ImaginaryLiteral::child_end() { return &Val+1; } 13305d66145eed1c319df5a69977cb8ff74f597ea544Chris Lattner 133177ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// StringLiteral 13329ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator StringLiteral::child_begin() { return child_iterator(); } 13339ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator StringLiteral::child_end() { return child_iterator(); } 133477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 133577ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// ParenExpr 13365549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ParenExpr::child_begin() { return &Val; } 13375549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ParenExpr::child_end() { return &Val+1; } 133877ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 133977ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// UnaryOperator 13405549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator UnaryOperator::child_begin() { return &Val; } 13415549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator UnaryOperator::child_end() { return &Val+1; } 134277ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 13430518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl// SizeOfAlignOfExpr 13440518999d3adcc289997bd974dce90cc97f5c1c44Sebastian RedlStmt::child_iterator SizeOfAlignOfExpr::child_begin() { 13450518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // If this is of a type and the type is a VLA type (and not a typedef), the 13460518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // size expression of the VLA needs to be treated as an executable expression. 13470518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // Why isn't this weirdness documented better in StmtIterator? 13480518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (isArgumentType()) { 13490518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (VariableArrayType* T = dyn_cast<VariableArrayType>( 13500518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl getArgumentType().getTypePtr())) 13510518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return child_iterator(T); 13520518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return child_iterator(); 13530518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl } 1354d457589fc69dc7a9c80cd74d317c0b81a35a27c9Sebastian Redl return child_iterator(&Argument.Ex); 13559ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 13560518999d3adcc289997bd974dce90cc97f5c1c44Sebastian RedlStmt::child_iterator SizeOfAlignOfExpr::child_end() { 13570518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (isArgumentType()) 13580518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return child_iterator(); 1359d457589fc69dc7a9c80cd74d317c0b81a35a27c9Sebastian Redl return child_iterator(&Argument.Ex + 1); 13609ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 136177ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 136277ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// ArraySubscriptExpr 13631237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ArraySubscriptExpr::child_begin() { 13645549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 136577ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 13661237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ArraySubscriptExpr::child_end() { 13675549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+END_EXPR; 136877ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 136977ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 137077ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// CallExpr 13711237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator CallExpr::child_begin() { 13725549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 137377ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 13741237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator CallExpr::child_end() { 13755549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+NumArgs+ARGS_START; 137677ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 13771237c673c07f9d827129ba02720108816abde562Ted Kremenek 13781237c673c07f9d827129ba02720108816abde562Ted Kremenek// MemberExpr 13795549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator MemberExpr::child_begin() { return &Base; } 13805549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator MemberExpr::child_end() { return &Base+1; } 13811237c673c07f9d827129ba02720108816abde562Ted Kremenek 1382213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman// ExtVectorElementExpr 13835549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ExtVectorElementExpr::child_begin() { return &Base; } 13845549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ExtVectorElementExpr::child_end() { return &Base+1; } 13851237c673c07f9d827129ba02720108816abde562Ted Kremenek 13861237c673c07f9d827129ba02720108816abde562Ted Kremenek// CompoundLiteralExpr 13875549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CompoundLiteralExpr::child_begin() { return &Init; } 13885549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CompoundLiteralExpr::child_end() { return &Init+1; } 13891237c673c07f9d827129ba02720108816abde562Ted Kremenek 13901237c673c07f9d827129ba02720108816abde562Ted Kremenek// CastExpr 13915549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CastExpr::child_begin() { return &Op; } 13925549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CastExpr::child_end() { return &Op+1; } 13931237c673c07f9d827129ba02720108816abde562Ted Kremenek 13941237c673c07f9d827129ba02720108816abde562Ted Kremenek// BinaryOperator 13951237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator BinaryOperator::child_begin() { 13965549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 13971237c673c07f9d827129ba02720108816abde562Ted Kremenek} 13981237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator BinaryOperator::child_end() { 13995549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+END_EXPR; 14001237c673c07f9d827129ba02720108816abde562Ted Kremenek} 14011237c673c07f9d827129ba02720108816abde562Ted Kremenek 14021237c673c07f9d827129ba02720108816abde562Ted Kremenek// ConditionalOperator 14031237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ConditionalOperator::child_begin() { 14045549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 14051237c673c07f9d827129ba02720108816abde562Ted Kremenek} 14061237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ConditionalOperator::child_end() { 14075549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+END_EXPR; 14081237c673c07f9d827129ba02720108816abde562Ted Kremenek} 14091237c673c07f9d827129ba02720108816abde562Ted Kremenek 14101237c673c07f9d827129ba02720108816abde562Ted Kremenek// AddrLabelExpr 14119ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator AddrLabelExpr::child_begin() { return child_iterator(); } 14129ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator AddrLabelExpr::child_end() { return child_iterator(); } 14131237c673c07f9d827129ba02720108816abde562Ted Kremenek 14141237c673c07f9d827129ba02720108816abde562Ted Kremenek// StmtExpr 14155549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator StmtExpr::child_begin() { return &SubStmt; } 14165549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator StmtExpr::child_end() { return &SubStmt+1; } 14171237c673c07f9d827129ba02720108816abde562Ted Kremenek 14181237c673c07f9d827129ba02720108816abde562Ted Kremenek// TypesCompatibleExpr 14199ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator TypesCompatibleExpr::child_begin() { 14209ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14219ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14229ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek 14239ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator TypesCompatibleExpr::child_end() { 14249ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14259ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14261237c673c07f9d827129ba02720108816abde562Ted Kremenek 14271237c673c07f9d827129ba02720108816abde562Ted Kremenek// ChooseExpr 14285549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ChooseExpr::child_begin() { return &SubExprs[0]; } 14295549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ChooseExpr::child_end() { return &SubExprs[0]+END_EXPR; } 14302d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor 14312d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor// GNUNullExpr 14322d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas GregorStmt::child_iterator GNUNullExpr::child_begin() { return child_iterator(); } 14332d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas GregorStmt::child_iterator GNUNullExpr::child_end() { return child_iterator(); } 14341237c673c07f9d827129ba02720108816abde562Ted Kremenek 1435e2ce1d9440186cf3332368291cd884a6e3ae8946Nate Begeman// OverloadExpr 14365549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator OverloadExpr::child_begin() { return &SubExprs[0]; } 14375549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator OverloadExpr::child_end() { return &SubExprs[0]+NumExprs; } 1438e2ce1d9440186cf3332368291cd884a6e3ae8946Nate Begeman 1439d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman// ShuffleVectorExpr 1440d38617c8a50f9729c254ab76cd359af797c6739bEli FriedmanStmt::child_iterator ShuffleVectorExpr::child_begin() { 14415549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 1442d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman} 1443d38617c8a50f9729c254ab76cd359af797c6739bEli FriedmanStmt::child_iterator ShuffleVectorExpr::child_end() { 14445549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+NumExprs; 1445d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman} 1446d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman 14477c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson// VAArgExpr 14485549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator VAArgExpr::child_begin() { return &Val; } 14495549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator VAArgExpr::child_end() { return &Val+1; } 14507c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson 145166b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson// InitListExpr 145266b5a8a39088598c01a9fa6f032dc908612dc8ecAnders CarlssonStmt::child_iterator InitListExpr::child_begin() { 14535549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return InitExprs.size() ? &InitExprs[0] : 0; 145466b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson} 145566b5a8a39088598c01a9fa6f032dc908612dc8ecAnders CarlssonStmt::child_iterator InitListExpr::child_end() { 14565549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return InitExprs.size() ? &InitExprs[0] + InitExprs.size() : 0; 145766b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson} 145866b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson 14591237c673c07f9d827129ba02720108816abde562Ted Kremenek// ObjCStringLiteral 14609ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCStringLiteral::child_begin() { 14619ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14629ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14639ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCStringLiteral::child_end() { 14649ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14659ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14661237c673c07f9d827129ba02720108816abde562Ted Kremenek 14671237c673c07f9d827129ba02720108816abde562Ted Kremenek// ObjCEncodeExpr 14689ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCEncodeExpr::child_begin() { return child_iterator(); } 14699ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCEncodeExpr::child_end() { return child_iterator(); } 14701237c673c07f9d827129ba02720108816abde562Ted Kremenek 1471b62f6813406a03bf8a371c4e46c9fad51d102121Fariborz Jahanian// ObjCSelectorExpr 14729ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCSelectorExpr::child_begin() { 14739ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14749ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14759ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCSelectorExpr::child_end() { 14769ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14779ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 1478b62f6813406a03bf8a371c4e46c9fad51d102121Fariborz Jahanian 1479390d50a725497e99247dc104a7d2c2a255d3af14Fariborz Jahanian// ObjCProtocolExpr 14809ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCProtocolExpr::child_begin() { 14819ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14829ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14839ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCProtocolExpr::child_end() { 14849ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14859ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 1486390d50a725497e99247dc104a7d2c2a255d3af14Fariborz Jahanian 1487563477da25f824e37c535131695dc4dc9b68c465Steve Naroff// ObjCMessageExpr 1488ea958e57a370b641c5a69347b75e9f8e3b5a41a2Ted KremenekStmt::child_iterator ObjCMessageExpr::child_begin() { 14895549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return getReceiver() ? &SubExprs[0] : &SubExprs[0] + ARGS_START; 1490563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1491563477da25f824e37c535131695dc4dc9b68c465Steve NaroffStmt::child_iterator ObjCMessageExpr::child_end() { 14925549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+ARGS_START+getNumArgs(); 1493563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1494563477da25f824e37c535131695dc4dc9b68c465Steve Naroff 14954eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff// Blocks 149656ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve NaroffStmt::child_iterator BlockExpr::child_begin() { return child_iterator(); } 149756ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve NaroffStmt::child_iterator BlockExpr::child_end() { return child_iterator(); } 14984eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 14999da13f9ddb2567e36f4bbee7b3c32f54aeb76d5bTed KremenekStmt::child_iterator BlockDeclRefExpr::child_begin() { return child_iterator();} 15009da13f9ddb2567e36f4bbee7b3c32f54aeb76d5bTed KremenekStmt::child_iterator BlockDeclRefExpr::child_end() { return child_iterator(); } 1501