Expr.cpp revision 88a3514f36de96b19cdf50141c640df1a5f13f6c
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 } 41086f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor case MemberExprClass: { 4115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const MemberExpr *m = cast<MemberExpr>(this); 41286f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (Ctx.getLangOptions().CPlusPlus) { // C++ [expr.ref]p4: 41386f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor NamedDecl *Member = m->getMemberDecl(); 41486f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // C++ [expr.ref]p4: 41586f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // If E2 is declared to have type "reference to T", then E1.E2 41686f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // is an lvalue. 41786f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (ValueDecl *Value = dyn_cast<ValueDecl>(Member)) 41886f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (Value->getType()->isReferenceType()) 41986f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return LV_Valid; 42086f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 42186f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // -- If E2 is a static data member [...] then E1.E2 is an lvalue. 42286f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (isa<CXXClassVarDecl>(Member)) 42386f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return LV_Valid; 42486f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 42586f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // -- If E2 is a non-static data member [...]. If E1 is an 42686f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // lvalue, then E1.E2 is an lvalue. 42786f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (isa<FieldDecl>(Member)) 42886f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return m->isArrow() ? LV_Valid : m->getBase()->isLvalue(Ctx); 42986f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 43086f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // -- If it refers to a static member function [...], then 43186f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // E1.E2 is an lvalue. 43286f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // -- Otherwise, if E1.E2 refers to a non-static member 43386f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // function [...], then E1.E2 is not an lvalue. 43486f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(Member)) 43586f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return Method->isStatic()? LV_Valid : LV_MemberFunction; 43686f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 43786f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // -- If E2 is a member enumerator [...], the expression E1.E2 43886f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // is not an lvalue. 43986f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (isa<EnumConstantDecl>(Member)) 44086f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return LV_InvalidExpression; 44186f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 44286f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // Not an lvalue. 44386f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return LV_InvalidExpression; 44486f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor } 44586f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 44686f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // C99 6.5.2.3p4 44728be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return m->isArrow() ? LV_Valid : m->getBase()->isLvalue(Ctx); 448fdd75663fffeb2058a7847975e50837e61200593Anton Korobeynikov } 4497da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner case UnaryOperatorClass: 4505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Deref) 4517da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner return LV_Valid; // C99 6.5.3p4 4527da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner 4537da36f642e907ff5a5ba4b18b5bfebfabf36ecc7Chris Lattner if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Real || 454baf0d6678418e0dd9309438c3e50274253cfc7b2Chris Lattner cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Imag || 455baf0d6678418e0dd9309438c3e50274253cfc7b2Chris Lattner cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Extension) 45628be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return cast<UnaryOperator>(this)->getSubExpr()->isLvalue(Ctx); // GNU. 45774253736184c0717a0649922551bf9d8b6815651Douglas Gregor 45874253736184c0717a0649922551bf9d8b6815651Douglas Gregor if (Ctx.getLangOptions().CPlusPlus && // C++ [expr.pre.incr]p1 45974253736184c0717a0649922551bf9d8b6815651Douglas Gregor (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::PreInc || 46074253736184c0717a0649922551bf9d8b6815651Douglas Gregor cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::PreDec)) 46174253736184c0717a0649922551bf9d8b6815651Douglas Gregor return LV_Valid; 4625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 463eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor case ImplicitCastExprClass: 464eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor return cast<ImplicitCastExpr>(this)->isLvalueCast()? LV_Valid 465eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor : LV_InvalidExpression; 4665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ParenExprClass: // C99 6.5.1p5 46728be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return cast<ParenExpr>(this)->getSubExpr()->isLvalue(Ctx); 468eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor case BinaryOperatorClass: 469eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor case CompoundAssignOperatorClass: { 470eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor const BinaryOperator *BinOp = cast<BinaryOperator>(this); 471337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor 472337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor if (Ctx.getLangOptions().CPlusPlus && // C++ [expr.comma]p1 473337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor BinOp->getOpcode() == BinaryOperator::Comma) 474337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor return BinOp->getRHS()->isLvalue(Ctx); 475337c6b9f5d502dc1c5acea628bf7bf9e828efc0eDouglas Gregor 476bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor if (!BinOp->isAssignmentOp()) 477eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor return LV_InvalidExpression; 478eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor 479bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor if (Ctx.getLangOptions().CPlusPlus) 480bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // C++ [expr.ass]p1: 481bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // The result of an assignment operation [...] is an lvalue. 482bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor return LV_Valid; 483bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor 484bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor 485bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // C99 6.5.16: 486bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor // An assignment expression [...] is not an lvalue. 487bf3af056289893f58d37b05a2c80970708781d61Douglas Gregor return LV_InvalidExpression; 488eb8f3063257a392f15aea48d42fb73ec51afc548Douglas Gregor } 489b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CallExprClass: 49088a3514f36de96b19cdf50141c640df1a5f13f6cDouglas Gregor case CXXOperatorCallExprClass: 49188a3514f36de96b19cdf50141c640df1a5f13f6cDouglas Gregor case CXXMemberCallExprClass: { 4929d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // C++ [expr.call]p10: 4939d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // A function call is an lvalue if and only if the result type 4949d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // is a reference. 49527c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor QualType CalleeType = cast<CallExpr>(this)->getCallee()->getType(); 4969d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor if (const PointerType *FnTypePtr = CalleeType->getAsPointerType()) 49788a3514f36de96b19cdf50141c640df1a5f13f6cDouglas Gregor CalleeType = FnTypePtr->getPointeeType(); 49888a3514f36de96b19cdf50141c640df1a5f13f6cDouglas Gregor if (const FunctionType *FnType = CalleeType->getAsFunctionType()) 49988a3514f36de96b19cdf50141c640df1a5f13f6cDouglas Gregor if (FnType->getResultType()->isReferenceType()) 50088a3514f36de96b19cdf50141c640df1a5f13f6cDouglas Gregor return LV_Valid; 5019d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor 5029d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor break; 5039d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor } 504e6386394677ed4f77b20e2e3d5446a3a2f628e53Steve Naroff case CompoundLiteralExprClass: // C99 6.5.2.5p5 505e6386394677ed4f77b20e2e3d5446a3a2f628e53Steve Naroff return LV_Valid; 506670a62cd1d51042ea076cda5e93f26a1d8327fb3Chris Lattner case ChooseExprClass: 507670a62cd1d51042ea076cda5e93f26a1d8327fb3Chris Lattner // __builtin_choose_expr is an lvalue if the selected operand is. 508670a62cd1d51042ea076cda5e93f26a1d8327fb3Chris Lattner if (cast<ChooseExpr>(this)->isConditionTrue(Ctx)) 509670a62cd1d51042ea076cda5e93f26a1d8327fb3Chris Lattner return cast<ChooseExpr>(this)->getLHS()->isLvalue(Ctx); 510670a62cd1d51042ea076cda5e93f26a1d8327fb3Chris Lattner else 511670a62cd1d51042ea076cda5e93f26a1d8327fb3Chris Lattner return cast<ChooseExpr>(this)->getRHS()->isLvalue(Ctx); 512670a62cd1d51042ea076cda5e93f26a1d8327fb3Chris Lattner 513213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman case ExtVectorElementExprClass: 514213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman if (cast<ExtVectorElementExpr>(this)->containsDuplicateElements()) 515fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return LV_DuplicateVectorComponents; 516fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return LV_Valid; 517027282d1c1ac151aa7b1b3b45babc918b8ad456aSteve Naroff case ObjCIvarRefExprClass: // ObjC instance variables are lvalues. 518027282d1c1ac151aa7b1b3b45babc918b8ad456aSteve Naroff return LV_Valid; 519799a6a6850af625946bb8d88ca960bb6604e3858Steve Naroff case ObjCPropertyRefExprClass: // FIXME: check if read-only property. 520799a6a6850af625946bb8d88ca960bb6604e3858Steve Naroff return LV_Valid; 5215daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian case ObjCKVCRefExprClass: // FIXME: check if read-only property. 522670a62cd1d51042ea076cda5e93f26a1d8327fb3Chris Lattner return LV_Valid; 523d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris Lattner case PredefinedExprClass: 524796da18402f286b897782a298ae3b20c459c102eDouglas Gregor return LV_Valid; 5259d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case VAArgExprClass: 5269d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor return LV_Valid; 52704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 52828be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner return cast<CXXDefaultArgExpr>(this)->getExpr()->isLvalue(Ctx); 52924b41fa8239c63b9eb570d3e83c4a82840656a65Argyrios Kyrtzidis case CXXConditionDeclExprClass: 53024b41fa8239c63b9eb570d3e83c4a82840656a65Argyrios Kyrtzidis return LV_Valid; 5316eec8e883de118b431e3ead5b1e604a6ac68ff6bDouglas Gregor case CStyleCastExprClass: 5329d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXFunctionalCastExprClass: 5339d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXStaticCastExprClass: 5349d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXDynamicCastExprClass: 5359d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXReinterpretCastExprClass: 5369d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor case CXXConstCastExprClass: 5379d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // The result of an explicit cast is an lvalue if the type we are 5389d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // casting to is a reference type. See C++ [expr.cast]p1, 5399d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // C++ [expr.static.cast]p2, C++ [expr.dynamic.cast]p2, 5409d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor // C++ [expr.reinterpret.cast]p1, C++ [expr.const.cast]p1. 5419d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor if (cast<ExplicitCastExpr>(this)->getTypeAsWritten()->isReferenceType()) 5429d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor return LV_Valid; 5439d293dfc0ad7c44ae0b5eb9517f1ed8c8d8b7ff7Douglas Gregor break; 544c42e1183846228a7fa5143ad76507d6d60f5c6f3Sebastian Redl case CXXTypeidExprClass: 545c42e1183846228a7fa5143ad76507d6d60f5c6f3Sebastian Redl // C++ 5.2.8p1: The result of a typeid expression is an lvalue of ... 546c42e1183846228a7fa5143ad76507d6d60f5c6f3Sebastian Redl return LV_Valid; 5475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 5485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 5495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return LV_InvalidExpression; 5515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 5525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, 5545f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// does not have an incomplete type, does not have a const-qualified type, and 5555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// if it is a structure or union, does not have any member (including, 5565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// recursively, any member or element of all contained aggregates or unions) 5575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// with a const-qualified type. 55828be73f74c9e241a23ea24fe5756623de6bf1084Chris LattnerExpr::isModifiableLvalueResult Expr::isModifiableLvalue(ASTContext &Ctx) const { 55928be73f74c9e241a23ea24fe5756623de6bf1084Chris Lattner isLvalueResult lvalResult = isLvalue(Ctx); 5605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 5615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (lvalResult) { 562ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor case LV_Valid: 563ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor // C++ 3.10p11: Functions cannot be modified, but pointers to 564ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor // functions can be modifiable. 565ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor if (Ctx.getLangOptions().CPlusPlus && TR->isFunctionType()) 566ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor return MLV_NotObjectType; 567ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor break; 568ae8d467e75a4e72b19e1eca199bf93dfaab47acfDouglas Gregor 5695f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LV_NotObjectType: return MLV_NotObjectType; 5705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case LV_IncompleteVoidType: return MLV_IncompleteVoidType; 571fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff case LV_DuplicateVectorComponents: return MLV_DuplicateVectorComponents; 572ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner case LV_InvalidExpression: 573ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // If the top level is a C-style cast, and the subexpression is a valid 574ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // lvalue, then this is probably a use of the old-school "cast as lvalue" 575ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // GCC extension. We don't support it, but we want to produce good 576ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner // diagnostics when it happens so that the user knows why. 577ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner if (const CStyleCastExpr *CE = dyn_cast<CStyleCastExpr>(this)) 578ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner if (CE->getSubExpr()->isLvalue(Ctx) == LV_Valid) 579ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner return MLV_LValueCast; 580ca354faa7e9b99af17070c82b9662a5fca76422cChris Lattner return MLV_InvalidExpression; 58186f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor case LV_MemberFunction: return MLV_MemberFunction; 5825f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 583c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner 584c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner QualType CT = Ctx.getCanonicalType(getType()); 585c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner 586c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (CT.isConstQualified()) 5875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_ConstQualified; 588c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (CT->isArrayType()) 5895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_ArrayType; 590c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (CT->isIncompleteType()) 5915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_IncompleteType; 5925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 593c63a1f276f7b324fd9a4be82098b1c8f7bf30733Chris Lattner if (const RecordType *r = CT->getAsRecordType()) { 5945f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (r->hasConstFields()) 5955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_ConstQualified; 5965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 5974f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // The following is illegal: 5984f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // void takeclosure(void (^C)(void)); 5994f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // void func() { int x = 1; takeclosure(^{ x = 7 }); } 6004f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff // 6014f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff if (getStmtClass() == BlockDeclRefExprClass) { 6024f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff const BlockDeclRefExpr *BDR = cast<BlockDeclRefExpr>(this); 6034f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff if (!BDR->isByRef() && isa<VarDecl>(BDR->getDecl())) 6044f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff return MLV_NotBlockQualified; 6054f6a7d7ead09b439216c32f2de806a998aeb222aSteve Naroff } 6065daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian // Assigning to a readonly property? 6075daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian if (getStmtClass() == ObjCPropertyRefExprClass) { 6085daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian const ObjCPropertyRefExpr* PropExpr = cast<ObjCPropertyRefExpr>(this); 6095daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian if (ObjCPropertyDecl *PDecl = PropExpr->getProperty()) { 61031afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian QualType BaseType = PropExpr->getBase()->getType(); 61131afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian if (const PointerType *PTy = BaseType->getAsPointerType()) 61231afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian if (const ObjCInterfaceType *IFTy = 61331afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian PTy->getPointeeType()->getAsObjCInterfaceType()) 61431afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian if (ObjCInterfaceDecl *IFace = IFTy->getDecl()) 61531afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian if (IFace->isPropertyReadonly(PDecl)) 61631afbf02a381ae9c77d225aa54f972d152838b3aFariborz Jahanian return MLV_ReadonlyProperty; 6175daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian } 6185daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian } 619ba8d2d684e74a20bef03828c21c991d222c7e9e5Fariborz Jahanian // Assigning to an 'implicit' property? 6206669db9d80d77d10f101aa9f8e488bbd2d98f76cFariborz Jahanian else if (getStmtClass() == ObjCKVCRefExprClass) { 621ba8d2d684e74a20bef03828c21c991d222c7e9e5Fariborz Jahanian const ObjCKVCRefExpr* KVCExpr = cast<ObjCKVCRefExpr>(this); 622ba8d2d684e74a20bef03828c21c991d222c7e9e5Fariborz Jahanian if (KVCExpr->getSetterMethod() == 0) 623ba8d2d684e74a20bef03828c21c991d222c7e9e5Fariborz Jahanian return MLV_NoSetterProperty; 624ba8d2d684e74a20bef03828c21c991d222c7e9e5Fariborz Jahanian } 6255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return MLV_Valid; 6265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 6275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 6282e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek/// hasGlobalStorage - Return true if this expression has static storage 6294cc627111453b75519d5130b57e06256da7b00e8Chris Lattner/// duration. This means that the address of this expression is a link-time 6304cc627111453b75519d5130b57e06256da7b00e8Chris Lattner/// constant. 6312e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenekbool Expr::hasGlobalStorage() const { 6321d09ecca892185ba067e47ba879f424de59950efChris Lattner switch (getStmtClass()) { 6331d09ecca892185ba067e47ba879f424de59950efChris Lattner default: 6341d09ecca892185ba067e47ba879f424de59950efChris Lattner return false; 6354cc627111453b75519d5130b57e06256da7b00e8Chris Lattner case ParenExprClass: 6362e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return cast<ParenExpr>(this)->getSubExpr()->hasGlobalStorage(); 6374cc627111453b75519d5130b57e06256da7b00e8Chris Lattner case ImplicitCastExprClass: 6382e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return cast<ImplicitCastExpr>(this)->getSubExpr()->hasGlobalStorage(); 639e9b12198c4cc7f5687960100351b4af006c14469Steve Naroff case CompoundLiteralExprClass: 640e9b12198c4cc7f5687960100351b4af006c14469Steve Naroff return cast<CompoundLiteralExpr>(this)->isFileScope(); 6411d09ecca892185ba067e47ba879f424de59950efChris Lattner case DeclRefExprClass: { 6421d09ecca892185ba067e47ba879f424de59950efChris Lattner const Decl *D = cast<DeclRefExpr>(this)->getDecl(); 6431d09ecca892185ba067e47ba879f424de59950efChris Lattner if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 6442e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return VD->hasGlobalStorage(); 64563f067f5a75ae97b53dc7a6a6530e2c72c8bb7f8Seo Sanghyeon if (isa<FunctionDecl>(D)) 64663f067f5a75ae97b53dc7a6a6530e2c72c8bb7f8Seo Sanghyeon return true; 6471d09ecca892185ba067e47ba879f424de59950efChris Lattner return false; 6481d09ecca892185ba067e47ba879f424de59950efChris Lattner } 649fb7080663a0f0abd687a6f58ac917d9a76318b73Chris Lattner case MemberExprClass: { 6501d09ecca892185ba067e47ba879f424de59950efChris Lattner const MemberExpr *M = cast<MemberExpr>(this); 6512e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return !M->isArrow() && M->getBase()->hasGlobalStorage(); 652fb7080663a0f0abd687a6f58ac917d9a76318b73Chris Lattner } 6534cc627111453b75519d5130b57e06256da7b00e8Chris Lattner case ArraySubscriptExprClass: 6542e5f54aa1dd15a62c34a9d1d24a5a0692f43934aTed Kremenek return cast<ArraySubscriptExpr>(this)->getBase()->hasGlobalStorage(); 655d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris Lattner case PredefinedExprClass: 656fa28b30d5a1e93e5263be33e343532b900d2c643Chris Lattner return true; 65704421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 65804421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return cast<CXXDefaultArgExpr>(this)->getExpr()->hasGlobalStorage(); 6591d09ecca892185ba067e47ba879f424de59950efChris Lattner } 6601d09ecca892185ba067e47ba879f424de59950efChris Lattner} 6611d09ecca892185ba067e47ba879f424de59950efChris Lattner 6624e99a5fc3b203397a91136c6e695e405fb8fc606Ted KremenekExpr* Expr::IgnoreParens() { 6634e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek Expr* E = this; 6644e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek while (ParenExpr* P = dyn_cast<ParenExpr>(E)) 6654e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek E = P->getSubExpr(); 6664e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek 6674e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek return E; 6684e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek} 6694e99a5fc3b203397a91136c6e695e405fb8fc606Ted Kremenek 67056f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner/// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr 67156f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner/// or CastExprs or ImplicitCastExprs, returning their operand. 67256f349400c5932a196509c0480ff6f99a9a0b48fChris LattnerExpr *Expr::IgnoreParenCasts() { 67356f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner Expr *E = this; 67456f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner while (true) { 67556f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner if (ParenExpr *P = dyn_cast<ParenExpr>(E)) 67656f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner E = P->getSubExpr(); 67756f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner else if (CastExpr *P = dyn_cast<CastExpr>(E)) 67856f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner E = P->getSubExpr(); 67956f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner else 68056f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner return E; 68156f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner } 68256f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner} 68356f349400c5932a196509c0480ff6f99a9a0b48fChris Lattner 684898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor/// hasAnyTypeDependentArguments - Determines if any of the expressions 685898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor/// in Exprs is type-dependent. 686898574e7496ba8fd76290079d3a9d06954992734Douglas Gregorbool Expr::hasAnyTypeDependentArguments(Expr** Exprs, unsigned NumExprs) { 687898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor for (unsigned I = 0; I < NumExprs; ++I) 688898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (Exprs[I]->isTypeDependent()) 689898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor return true; 690898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 691898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor return false; 692898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor} 693898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 694898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor/// hasAnyValueDependentArguments - Determines if any of the expressions 695898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor/// in Exprs is value-dependent. 696898574e7496ba8fd76290079d3a9d06954992734Douglas Gregorbool Expr::hasAnyValueDependentArguments(Expr** Exprs, unsigned NumExprs) { 697898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor for (unsigned I = 0; I < NumExprs; ++I) 698898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor if (Exprs[I]->isValueDependent()) 699898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor return true; 700898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 701898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor return false; 702898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor} 703898574e7496ba8fd76290079d3a9d06954992734Douglas Gregor 70438374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroffbool Expr::isConstantExpr(ASTContext &Ctx, SourceLocation *Loc) const { 705e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson switch (getStmtClass()) { 706e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson default: 707e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson if (!isEvaluatable(Ctx)) { 708e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson if (Loc) *Loc = getLocStart(); 709e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson return false; 710e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson } 711e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson break; 712e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson case StringLiteralClass: 713e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson return true; 714e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson case InitListExprClass: { 715e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson const InitListExpr *Exp = cast<InitListExpr>(this); 716e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson unsigned numInits = Exp->getNumInits(); 717e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson for (unsigned i = 0; i < numInits; i++) { 718e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson if (!Exp->getInit(i)->isConstantExpr(Ctx, Loc)) 719e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson return false; 720e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson } 721e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson } 722e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson } 723e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson 724e8a32b855ce4e8580a191f8d29d2f3f459834302Anders Carlsson return true; 72538374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff} 72638374b05791ee93300b9fbe8ceb3957f54184b37Steve Naroff 7275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// isIntegerConstantExpr - this recursive routine will test if an expression is 7285f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// an integer constant expression. Note: With the introduction of VLA's in 7295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// C99 the result of the sizeof operator is no longer always a constant 7305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// expression. The generalization of the wording to include any subexpression 7315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// that is not evaluated (C99 6.6p3) means that nonconstant subexpressions 7325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// can appear as operands to other operators (e.g. &&, ||, ?:). For instance, 7335f6b632391e24b08ead3e62ba2e2765e770382edNuno Lopes/// "0 || f()" can be treated as a constant expression. In C90 this expression, 7345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// occurring in a context requiring a constant, would have been a constraint 7355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// violation. FIXME: This routine currently implements C90 semantics. 7365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// To properly implement C99 semantics this routine will need to evaluate 7375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// expressions involving operators previously mentioned. 7385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 7395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// FIXME: Pass up a reason why! Invalid operation in i-c-e, division by zero, 7405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// comma, etc 7415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// 7425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// FIXME: This should ext-warn on overflow during evaluation! ISO C does not 743ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner/// permit this. This includes things like (int)1e1000 744ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// 745ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// FIXME: Handle offsetof. Two things to do: Handle GCC's __builtin_offsetof 746ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// to support gcc 4.0+ and handle the idiom GCC recognizes with a null pointer 747ce0afc0b09accbf7370b2ba87574b2c4be7fb032Chris Lattner/// cast+dereference. 748590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattnerbool Expr::isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, 749590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner SourceLocation *Loc, bool isEvaluated) const { 750a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // Pretest for integral type; some parts of the code crash for types that 751a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman // can't be sized. 752a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (!getType()->isIntegralType()) { 753a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman if (Loc) *Loc = getLocStart(); 754a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman return false; 755a6afa768aa7bd3102a2807aa720917e4a1771e4eEli Friedman } 7565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (getStmtClass()) { 7575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 7585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 7595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 7605f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ParenExprClass: 7615f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return cast<ParenExpr>(this)->getSubExpr()-> 762590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated); 7635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case IntegerLiteralClass: 7645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = cast<IntegerLiteral>(this)->getValue(); 7655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 7662eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner case CharacterLiteralClass: { 7672eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner const CharacterLiteral *CL = cast<CharacterLiteral>(this); 76898be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 7692eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner Result = CL->getValue(); 770f0fbcb356bc4eb5f6467dc4fc4bc447e9a630102Chris Lattner Result.setIsUnsigned(!getType()->isSignedIntegerType()); 7715f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 7722eadfb638eb1bb6ccfd6fd0453e764d47e27eed9Chris Lattner } 773b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson case CXXBoolLiteralExprClass: { 774b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson const CXXBoolLiteralExpr *BL = cast<CXXBoolLiteralExpr>(this); 775b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 776b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson Result = BL->getValue(); 777b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson Result.setIsUnsigned(!getType()->isSignedIntegerType()); 778b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson break; 779b88d45ea7eb835d36c4a4b3ea84b1260b120dd0aAnders Carlsson } 7807267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis case CXXZeroInitValueExprClass: 7817267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis Result.clear(); 7827267f7832e5f0c7f951765e201c5a2650eb1637bArgyrios Kyrtzidis break; 7837b658aa315784fa489a32daeacfe400512ce468dSteve Naroff case TypesCompatibleExprClass: { 7847b658aa315784fa489a32daeacfe400512ce468dSteve Naroff const TypesCompatibleExpr *TCE = cast<TypesCompatibleExpr>(this); 78598be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 786ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // Per gcc docs "this built-in function ignores top level 787ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // qualifiers". We need to use the canonical version to properly 788ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar // be able to strip CRV qualifiers from the type. 789ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T0 = Ctx.getCanonicalType(TCE->getArgType1()); 790ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar QualType T1 = Ctx.getCanonicalType(TCE->getArgType2()); 791ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar Result = Ctx.typesAreCompatible(T0.getUnqualifiedType(), 792ac620decb68aad1a2cf6c0c191b56d78981d9aaaDaniel Dunbar T1.getUnqualifiedType()); 793389cecc83f33e93c8ba6bf2e8269b8690404416fSteve Naroff break; 7947b658aa315784fa489a32daeacfe400512ce468dSteve Naroff } 795b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CallExprClass: 796b4609806e9232593ece09ce08b630836e825865cDouglas Gregor case CXXOperatorCallExprClass: { 79713b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff const CallExpr *CE = cast<CallExpr>(this); 79898be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 799a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 800a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // If this is a call to a builtin function, constant fold it otherwise 801a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner // reject it. 802a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner if (CE->isBuiltinCall()) { 8031c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson EvalResult EvalResult; 8041c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson if (CE->Evaluate(EvalResult, Ctx)) { 8051c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson assert(!EvalResult.HasSideEffects && 8061c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson "Foldable builtin call should not have side effects!"); 8071c0cfd4599e816cfd7a8f348286bf0ad79652ffcAnders Carlsson Result = EvalResult.Val.getInt(); 808a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner break; // It is a constant, expand it. 809a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner } 810a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner } 811a4d55d89c8076b402bb168e3edeef0c2cd2a78c3Chris Lattner 81213b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff if (Loc) *Loc = getLocStart(); 81313b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff return false; 81413b7c5ff42d6077a8d59e2c9ec9e7fedd0150ae6Steve Naroff } 8155f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case DeclRefExprClass: 8165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (const EnumConstantDecl *D = 8175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer dyn_cast<EnumConstantDecl>(cast<DeclRefExpr>(this)->getDecl())) { 8185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = D->getInitVal(); 8195f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 8225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperatorClass: { 8245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const UnaryOperator *Exp = cast<UnaryOperator>(this); 8255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8260518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // Get the operand value. If this is offsetof, do not evalute the 8275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // operand. This affects C99 6.6p3. 8280518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (!Exp->isOffsetOfOp() && !Exp->getSubExpr()-> 8290518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 8305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 8325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Exp->getOpcode()) { 8335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. 8345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // See C99 6.6p3. 8355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 8365f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = Exp->getOperatorLoc(); 8375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 8385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Extension: 83976e773a443be9f006610f46529e07d4c8d857680Chris Lattner return true; // FIXME: this is wrong. 8405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::LNot: { 841bf7553889594886213e05cd3f94a6d6f7747bf7bChris Lattner bool Val = Result == 0; 84298be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 8435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = Val; 8445f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8465f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Plus: 8475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Minus: 8495f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = -Result; 8505f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8515f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case UnaryOperator::Not: 8525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result = ~Result; 8535f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8545a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson case UnaryOperator::OffsetOf: 855aa1f9f1d50adf294674b74510b62e863b68572bcDaniel Dunbar Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 8565a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson Result = Exp->evaluateOffsetOf(Ctx); 8575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8595f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8600518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl case SizeOfAlignOfExprClass: { 8610518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl const SizeOfAlignOfExpr *Exp = cast<SizeOfAlignOfExpr>(this); 862a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner 863a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner // Return the result in the right width. 86498be4943e8dc4f3905629a7102668960873cf863Chris Lattner Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); 865a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner 8660518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl QualType ArgTy = Exp->getTypeOfArgument(); 867a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner // sizeof(void) and __alignof__(void) = 1 as a gcc extension. 8680518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (ArgTy->isVoidType()) { 869a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner Result = 1; 870a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner break; 871a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner } 872a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner 873a269ebfd91c4fa47e051fa1fa904833a022fe025Chris Lattner // alignof always evaluates to a constant, sizeof does if arg is not VLA. 8740518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (Exp->isSizeOf() && !ArgTy->isConstantSizeType()) { 87565383479cb2caf0f136f58fecdbdbaf9c497b7a1Chris Lattner if (Loc) *Loc = Exp->getOperatorLoc(); 8765f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 87765383479cb2caf0f136f58fecdbdbaf9c497b7a1Chris Lattner } 8785f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 87976e773a443be9f006610f46529e07d4c8d857680Chris Lattner // Get information about the size or align. 8800518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (ArgTy->isFunctionType()) { 881efdd1574e3cca00ef0410aee8b7ee36eda5a2f71Chris Lattner // GCC extension: sizeof(function) = 1. 882efdd1574e3cca00ef0410aee8b7ee36eda5a2f71Chris Lattner Result = Exp->isSizeOf() ? 1 : 4; 8836a24acbb3dbb3bea9426716bee6ad6023ad15f3fAnders Carlsson } else { 88498be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharSize = Ctx.Target.getCharWidth(); 8856a24acbb3dbb3bea9426716bee6ad6023ad15f3fAnders Carlsson if (Exp->isSizeOf()) 8860518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl Result = Ctx.getTypeSize(ArgTy) / CharSize; 8876a24acbb3dbb3bea9426716bee6ad6023ad15f3fAnders Carlsson else 8880518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl Result = Ctx.getTypeAlign(ArgTy) / CharSize; 889060e470e53b73167114284eb0b8c3e25bb3dad99Ted Kremenek } 8905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 8915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 8925f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperatorClass: { 8935f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const BinaryOperator *Exp = cast<BinaryOperator>(this); 894e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar llvm::APSInt LHS, RHS; 895e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar 896e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar // Initialize result to have correct signedness and width. 897e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = llvm::APSInt(static_cast<uint32_t>(Ctx.getTypeSize(getType())), 898b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman !getType()->isSignedIntegerType()); 899b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman 9005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The LHS of a constant expr is always evaluated and needed. 901e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar if (!Exp->getLHS()->isIntegerConstantExpr(LHS, Ctx, Loc, isEvaluated)) 9025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // The short-circuiting &&/|| operators don't necessarily evaluate their 9055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // RHS. Make sure to pass isEvaluated down correctly. 9065f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Exp->isLogicalOp()) { 9075f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer bool RHSEval; 9085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Exp->getOpcode() == BinaryOperator::LAnd) 909e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar RHSEval = LHS != 0; 9105f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer else { 9115f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(Exp->getOpcode() == BinaryOperator::LOr &&"Unexpected logical"); 912e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar RHSEval = LHS == 0; 9135f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 9145f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 915590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner if (!Exp->getRHS()->isIntegerConstantExpr(RHS, Ctx, Loc, 9165f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer isEvaluated & RHSEval)) 9175f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } else { 919590b6646ef747d2f7b42e5f40487ff07642d7b6fChris Lattner if (!Exp->getRHS()->isIntegerConstantExpr(RHS, Ctx, Loc, isEvaluated)) 9205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 9225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer switch (Exp->getOpcode()) { 9245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer default: 9255f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 9265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Mul: 928e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS * RHS; 9295f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 9305f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Div: 9315f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (RHS == 0) { 9325f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isEvaluated) break; 9335f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 9345f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9355f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 936e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS / RHS; 9375f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 9385f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Rem: 9395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (RHS == 0) { 9405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (!isEvaluated) break; 9415f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Loc) *Loc = getLocStart(); 9425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 9435f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 944e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS % RHS; 9455f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 946e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Add: Result = LHS + RHS; break; 947e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Sub: Result = LHS - RHS; break; 9485f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Shl: 949e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS << 950e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar static_cast<uint32_t>(RHS.getLimitedValue(LHS.getBitWidth()-1)); 951e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar break; 9525f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::Shr: 953e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS >> 954e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar static_cast<uint32_t>(RHS.getLimitedValue(LHS.getBitWidth()-1)); 9555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 956e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::LT: Result = LHS < RHS; break; 957e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::GT: Result = LHS > RHS; break; 958e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::LE: Result = LHS <= RHS; break; 959e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::GE: Result = LHS >= RHS; break; 960e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::EQ: Result = LHS == RHS; break; 961e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::NE: Result = LHS != RHS; break; 962e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::And: Result = LHS & RHS; break; 963e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Xor: Result = LHS ^ RHS; break; 964e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar case BinaryOperator::Or: Result = LHS | RHS; break; 9655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::LAnd: 966e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS != 0 && RHS != 0; 9675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 9685f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case BinaryOperator::LOr: 969e1226d24d23510e422160eb2413d9bb90de9b144Daniel Dunbar Result = LHS != 0 || RHS != 0; 9705f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 971b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman 972b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman case BinaryOperator::Comma: 973b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // C99 6.6p3: "shall not contain assignment, ..., or comma operators, 974b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // *except* when they are contained within a subexpression that is not 975b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // evaluated". Note that Assignment can never happen due to constraints 976b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // on the LHS subexpr, so we don't need to check it here. 977b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman if (isEvaluated) { 978b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman if (Loc) *Loc = getLocStart(); 979b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman return false; 980b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman } 981b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman 982b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman // The result of the constant expr is the RHS. 983b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman Result = RHS; 984b11e77836dd0867955c5abf32baf1c3e6c7f81e1Eli Friedman return true; 9855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 9865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 9875f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer assert(!Exp->isAssignmentOp() && "LHS can't be a constant expr!"); 9885f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 9895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 99026dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner case ImplicitCastExprClass: 9916eec8e883de118b431e3ead5b1e604a6ac68ff6bDouglas Gregor case CStyleCastExprClass: 992987a14bf5883ef6e5d07f1c83eb6d41a8212a78cArgyrios Kyrtzidis case CXXFunctionalCastExprClass: { 9930835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis const Expr *SubExpr = cast<CastExpr>(this)->getSubExpr(); 9940835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis SourceLocation CastLoc = getLocStart(); 99526dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner 9965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // C99 6.6p6: shall only convert arithmetic types to integer types. 99726dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (!SubExpr->getType()->isArithmeticType() || 99826dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner !getType()->isIntegerType()) { 99926dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (Loc) *Loc = SubExpr->getLocStart(); 10005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 10015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1002987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner 100398be4943e8dc4f3905629a7102668960873cf863Chris Lattner uint32_t DestWidth = static_cast<uint32_t>(Ctx.getTypeSize(getType())); 1004987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner 10055f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Handle simple integer->integer casts. 100626dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (SubExpr->getType()->isIntegerType()) { 100726dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner if (!SubExpr->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 10085f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 100926dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner 101026dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner // Figure out if this is a truncate, extend or noop cast. 101126dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner // If the input is signed, do a sign extend, noop, or truncate. 1012c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner if (getType()->isBooleanType()) { 1013c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner // Conversion to bool compares against zero. 1014c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result = Result != 0; 1015c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result.zextOrTrunc(DestWidth); 1016c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner } else if (SubExpr->getType()->isSignedIntegerType()) 101726dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner Result.sextOrTrunc(DestWidth); 101826dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner else // If the input is unsigned, do a zero extend, noop, or truncate. 101926dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner Result.zextOrTrunc(DestWidth); 10205f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 10215f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10225f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10235f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Allow floating constants that are the immediate operands of casts or that 10245f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // are parenthesized. 102526dc7b39267b7d29b35a7887a5b8e54697192192Chris Lattner const Expr *Operand = SubExpr; 10265f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer while (const ParenExpr *PE = dyn_cast<ParenExpr>(Operand)) 10275f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Operand = PE->getSubExpr(); 1028987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner 1029987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner // If this isn't a floating literal, we can't handle it. 1030987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner const FloatingLiteral *FL = dyn_cast<FloatingLiteral>(Operand); 1031987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner if (!FL) { 1032987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner if (Loc) *Loc = Operand->getLocStart(); 1033987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner return false; 1034987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner } 1035c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner 1036c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner // If the destination is boolean, compare against zero. 1037c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner if (getType()->isBooleanType()) { 1038c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result = !FL->getValue().isZero(); 1039c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner Result.zextOrTrunc(DestWidth); 1040c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner break; 1041c0a356b4fa35bf3f7d6031c229c071eef1a8f7a9Chris Lattner } 10425f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 1043987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner // Determine whether we are converting to unsigned or signed. 1044987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner bool DestSigned = getType()->isSignedIntegerType(); 1045ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner 1046ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner // TODO: Warn on overflow, but probably not here: isIntegerConstantExpr can 1047ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner // be called multiple times per AST. 1048ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen uint64_t Space[4]; 1049ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen bool ignored; 1050ccc213f5d4034bb6fcda14cad112d9029a508b66Chris Lattner (void)FL->getValue().convertToInteger(Space, DestWidth, DestSigned, 1051ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen llvm::APFloat::rmTowardZero, 1052ee5a700af3fe9ae1a639c271f093f40677dddc04Dale Johannesen &ignored); 1053987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner Result = llvm::APInt(DestWidth, 4, Space); 1054987b15db39745cd7fb2e634ba1a4b85469ac9131Chris Lattner break; 10555f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10565f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer case ConditionalOperatorClass: { 10575f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const ConditionalOperator *Exp = cast<ConditionalOperator>(this); 10585f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 105928daa53db73341b7ee7f269924ccfca1c6d179acChris Lattner const Expr *Cond = Exp->getCond(); 106028daa53db73341b7ee7f269924ccfca1c6d179acChris Lattner 106128daa53db73341b7ee7f269924ccfca1c6d179acChris Lattner if (!Cond->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 10625f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 10635f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10645f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const Expr *TrueExp = Exp->getLHS(); 10655f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer const Expr *FalseExp = Exp->getRHS(); 10665f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer if (Result == 0) std::swap(TrueExp, FalseExp); 10675f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 106828daa53db73341b7ee7f269924ccfca1c6d179acChris Lattner // If the condition (ignoring parens) is a __builtin_constant_p call, 106928daa53db73341b7ee7f269924ccfca1c6d179acChris Lattner // then only the true side is actually considered in an integer constant 107042b83dde7c700b34f9435ad746984169888ae705Chris Lattner // expression, and it is fully evaluated. This is an important GNU 107142b83dde7c700b34f9435ad746984169888ae705Chris Lattner // extension. See GCC PR38377 for discussion. 107228daa53db73341b7ee7f269924ccfca1c6d179acChris Lattner if (const CallExpr *CallCE = dyn_cast<CallExpr>(Cond->IgnoreParenCasts())) 107342b83dde7c700b34f9435ad746984169888ae705Chris Lattner if (CallCE->isBuiltinCall() == Builtin::BI__builtin_constant_p) { 107442b83dde7c700b34f9435ad746984169888ae705Chris Lattner EvalResult EVResult; 107542b83dde7c700b34f9435ad746984169888ae705Chris Lattner if (!Evaluate(EVResult, Ctx) || EVResult.HasSideEffects) 107642b83dde7c700b34f9435ad746984169888ae705Chris Lattner return false; 107742b83dde7c700b34f9435ad746984169888ae705Chris Lattner assert(EVResult.Val.isInt() && "FP conditional expr not expected"); 107842b83dde7c700b34f9435ad746984169888ae705Chris Lattner Result = EVResult.Val.getInt(); 107942b83dde7c700b34f9435ad746984169888ae705Chris Lattner if (Loc) *Loc = EVResult.DiagLoc; 108042b83dde7c700b34f9435ad746984169888ae705Chris Lattner return true; 108142b83dde7c700b34f9435ad746984169888ae705Chris Lattner } 108228daa53db73341b7ee7f269924ccfca1c6d179acChris Lattner 10835f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Evaluate the false one first, discard the result. 10843907323dd6665c0c4e383435cb145233f4533406Anders Carlsson if (FalseExp && !FalseExp->isIntegerConstantExpr(Result, Ctx, Loc, false)) 10855f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 10865f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Evalute the true one, capture the result. 10873907323dd6665c0c4e383435cb145233f4533406Anders Carlsson if (TrueExp && 10883907323dd6665c0c4e383435cb145233f4533406Anders Carlsson !TrueExp->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) 10895f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return false; 10905f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer break; 10915f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 109204421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner case CXXDefaultArgExprClass: 109304421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner return cast<CXXDefaultArgExpr>(this) 109404421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner ->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated); 10955f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 10965f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 10975f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // Cases that are valid constant exprs fall through to here. 10985f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer Result.setIsUnsigned(getType()->isUnsignedIntegerType()); 10995f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer return true; 11005f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 11015f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer 11025f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an 11035f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// integer constant expression with the value zero, or if this is one that is 11045f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer/// cast to void*. 1105efa9b3877ef298bcb792600ac33521827e1f7fafAnders Carlssonbool Expr::isNullPointerConstant(ASTContext &Ctx) const 1106efa9b3877ef298bcb792600ac33521827e1f7fafAnders Carlsson{ 11070777972d38a3125efed962b045704c30ae6965cfSebastian Redl // Strip off a cast to void*, if it exists. Except in C++. 11080835a3cdeefe714b4959d31127ea155e56393125Argyrios Kyrtzidis if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) { 11096215dee86c0e715b9f2b0d401ab2a5fcf629f1afSebastian Redl if (!Ctx.getLangOptions().CPlusPlus) { 11100777972d38a3125efed962b045704c30ae6965cfSebastian Redl // Check that it is a cast to void*. 11110777972d38a3125efed962b045704c30ae6965cfSebastian Redl if (const PointerType *PT = CE->getType()->getAsPointerType()) { 11120777972d38a3125efed962b045704c30ae6965cfSebastian Redl QualType Pointee = PT->getPointeeType(); 11130777972d38a3125efed962b045704c30ae6965cfSebastian Redl if (Pointee.getCVRQualifiers() == 0 && 11140777972d38a3125efed962b045704c30ae6965cfSebastian Redl Pointee->isVoidType() && // to void* 11150777972d38a3125efed962b045704c30ae6965cfSebastian Redl CE->getSubExpr()->getType()->isIntegerType()) // from int. 1116d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson return CE->getSubExpr()->isNullPointerConstant(Ctx); 11170777972d38a3125efed962b045704c30ae6965cfSebastian Redl } 11185f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer } 1119aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) { 1120aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // Ignore the ImplicitCastExpr type entirely. 1121d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson return ICE->getSubExpr()->isNullPointerConstant(Ctx); 1122aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) { 1123aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // Accept ((void*)0) as a null pointer constant, as many other 1124aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // implementations do. 1125d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson return PE->getSubExpr()->isNullPointerConstant(Ctx); 11268123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner } else if (const CXXDefaultArgExpr *DefaultArg 11278123a95c33b792d35c2e4992ba6e27882748fb0dChris Lattner = dyn_cast<CXXDefaultArgExpr>(this)) { 112804421087832a031c90bd58f128c7c0e741db8dd2Chris Lattner // See through default argument expressions 1129d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson return DefaultArg->getExpr()->isNullPointerConstant(Ctx); 11302d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor } else if (isa<GNUNullExpr>(this)) { 11312d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor // The GNU __null extension is always a null pointer constant. 11322d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor return true; 1133aaffbf7c790a324ed114184db771aae2d2e9151cSteve Naroff } 11342d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor 1135aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff // This expression must be an integer type. 1136aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff if (!getType()->isIntegerType()) 1137aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff return false; 1138aa58f00ebba5f14955001736b7aea20bb5bd91e6Steve Naroff 11395f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // If we have an integer constant expression, we need to *evaluate* it and 11405f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer // test for the value 0. 1141d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson // FIXME: We should probably return false if we're compiling in strict mode 1142d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson // and Diag is not null (this indicates that the value was foldable but not 1143d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson // an ICE. 1144d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson EvalResult Result; 1145efa9b3877ef298bcb792600ac33521827e1f7fafAnders Carlsson return Evaluate(Result, Ctx) && !Result.HasSideEffects && 1146d26527708b2b2f3b1d747f570efd10149d48364eAnders Carlsson Result.Val.isInt() && Result.Val.getInt() == 0; 11475f016e2cb5d11daeb237544de1c5d59f20fe1a6eReid Spencer} 114831a458462c6cf417a84e0c47852b18fb22d79acbSteve Naroff 114927c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor/// isBitField - Return true if this expression is a bit-field. 115027c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregorbool Expr::isBitField() { 115127c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor Expr *E = this->IgnoreParenCasts(); 115227c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E)) 115386f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (FieldDecl *Field = dyn_cast<FieldDecl>(MemRef->getMemberDecl())) 115486f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return Field->isBitField(); 115527c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor return false; 115627c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor} 115727c8dc06f65d7abcf6a7e7f64a7960c9a150ca01Douglas Gregor 1158213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begemanunsigned ExtVectorElementExpr::getNumElements() const { 11598a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman if (const VectorType *VT = getType()->getAsVectorType()) 11608a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman return VT->getNumElements(); 11618a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman return 1; 11624d0ac88428b3ed7c6f3a2f4e758ea5424ecd70aeChris Lattner} 11634d0ac88428b3ed7c6f3a2f4e758ea5424ecd70aeChris Lattner 11648a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman/// containsDuplicateElements - Return true if any element access is repeated. 1165213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begemanbool ExtVectorElementExpr::containsDuplicateElements() const { 1166fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff const char *compStr = Accessor.getName(); 11677e3e9b152e06edf329ceb32190d3255f248d4d5fChris Lattner unsigned length = Accessor.getLength(); 1168fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff 11697e3e9b152e06edf329ceb32190d3255f248d4d5fChris Lattner for (unsigned i = 0; i != length-1; i++) { 1170fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff const char *s = compStr+i; 1171fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff for (const char c = *s++; *s; s++) 1172fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff if (c == *s) 1173fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return true; 1174fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff } 1175fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff return false; 1176fec0b49c3fa621fbf63e420f3d54a5bb3a0265d2Steve Naroff} 1177b8f849da3cedee2f61ad98389115ddd04e439d60Chris Lattner 11788a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman/// getEncodedElementAccess - We encode the fields as a llvm ConstantArray. 11793b8d116703db8018f855cbb4733ace426422623bNate Begemanvoid ExtVectorElementExpr::getEncodedElementAccess( 11803b8d116703db8018f855cbb4733ace426422623bNate Begeman llvm::SmallVectorImpl<unsigned> &Elts) const { 118192e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isHi = Accessor.isStr("hi"); 118292e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isLo = Accessor.isStr("lo"); 118392e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isEven = Accessor.isStr("e"); 118492e62b02226410bcad8584541b8f1ff4d35ebab9Chris Lattner bool isOdd = Accessor.isStr("o"); 11858a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman 11867e3e9b152e06edf329ceb32190d3255f248d4d5fChris Lattner const char *compStr = Accessor.getName(); 11878a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman for (unsigned i = 0, e = getNumElements(); i != e; ++i) { 11888a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman uint64_t Index; 11898a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman 11908a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman if (isHi) 11918a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = e + i; 11928a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else if (isLo) 11938a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = i; 11948a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else if (isEven) 11958a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = 2 * i; 11968a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else if (isOdd) 11978a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = 2 * i + 1; 11988a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman else 11998a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman Index = ExtVectorType::getAccessorIdx(compStr[i]); 1200b8f849da3cedee2f61ad98389115ddd04e439d60Chris Lattner 12013b8d116703db8018f855cbb4733ace426422623bNate Begeman Elts.push_back(Index); 1202b8f849da3cedee2f61ad98389115ddd04e439d60Chris Lattner } 12038a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman} 12048a99764f9b778a54e7440b1ee06a1e48f25d76d8Nate Begeman 120568d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff// constructor for instance messages. 1206bcfb06ac6da1aa3c74ac1ef7a49c2807522366e7Steve NaroffObjCMessageExpr::ObjCMessageExpr(Expr *receiver, Selector selInfo, 1207a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek QualType retType, ObjCMethodDecl *mproto, 1208db611d556f71f98b66b69514d45958d76e5727abSteve Naroff SourceLocation LBrac, SourceLocation RBrac, 120949f109c786f99eb7468dac3976db083a65493444Steve Naroff Expr **ArgExprs, unsigned nargs) 1210db611d556f71f98b66b69514d45958d76e5727abSteve Naroff : Expr(ObjCMessageExprClass, retType), SelName(selInfo), 1211ea958e57a370b641c5a69347b75e9f8e3b5a41a2Ted Kremenek MethodProto(mproto) { 121249f109c786f99eb7468dac3976db083a65493444Steve Naroff NumArgs = nargs; 12135549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek SubExprs = new Stmt*[NumArgs+1]; 121468d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff SubExprs[RECEIVER] = receiver; 121549f109c786f99eb7468dac3976db083a65493444Steve Naroff if (NumArgs) { 121649f109c786f99eb7468dac3976db083a65493444Steve Naroff for (unsigned i = 0; i != NumArgs; ++i) 121768d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); 121868d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff } 1219563477da25f824e37c535131695dc4dc9b68c465Steve Naroff LBracloc = LBrac; 1220563477da25f824e37c535131695dc4dc9b68c465Steve Naroff RBracloc = RBrac; 1221563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1222563477da25f824e37c535131695dc4dc9b68c465Steve Naroff 122368d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff// constructor for class messages. 122468d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff// FIXME: clsName should be typed to ObjCInterfaceType 1225bcfb06ac6da1aa3c74ac1ef7a49c2807522366e7Steve NaroffObjCMessageExpr::ObjCMessageExpr(IdentifierInfo *clsName, Selector selInfo, 1226a526c5c67e5a0473c340903ee542ce570119665fTed Kremenek QualType retType, ObjCMethodDecl *mproto, 1227db611d556f71f98b66b69514d45958d76e5727abSteve Naroff SourceLocation LBrac, SourceLocation RBrac, 122849f109c786f99eb7468dac3976db083a65493444Steve Naroff Expr **ArgExprs, unsigned nargs) 1229db611d556f71f98b66b69514d45958d76e5727abSteve Naroff : Expr(ObjCMessageExprClass, retType), SelName(selInfo), 1230ea958e57a370b641c5a69347b75e9f8e3b5a41a2Ted Kremenek MethodProto(mproto) { 123149f109c786f99eb7468dac3976db083a65493444Steve Naroff NumArgs = nargs; 12325549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek SubExprs = new Stmt*[NumArgs+1]; 12334df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs[RECEIVER] = (Expr*) ((uintptr_t) clsName | IsClsMethDeclUnknown); 123449f109c786f99eb7468dac3976db083a65493444Steve Naroff if (NumArgs) { 123549f109c786f99eb7468dac3976db083a65493444Steve Naroff for (unsigned i = 0; i != NumArgs; ++i) 123668d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); 123768d331a78e655d97294e94fcfa63f92cc1f40578Steve Naroff } 1238563477da25f824e37c535131695dc4dc9b68c465Steve Naroff LBracloc = LBrac; 1239563477da25f824e37c535131695dc4dc9b68c465Steve Naroff RBracloc = RBrac; 1240563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1241563477da25f824e37c535131695dc4dc9b68c465Steve Naroff 12424df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek// constructor for class messages. 12434df728e368fa1f65ffc57572fed613dcca5b4fe8Ted KremenekObjCMessageExpr::ObjCMessageExpr(ObjCInterfaceDecl *cls, Selector selInfo, 12444df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek QualType retType, ObjCMethodDecl *mproto, 12454df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SourceLocation LBrac, SourceLocation RBrac, 12464df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek Expr **ArgExprs, unsigned nargs) 12474df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek: Expr(ObjCMessageExprClass, retType), SelName(selInfo), 12484df728e368fa1f65ffc57572fed613dcca5b4fe8Ted KremenekMethodProto(mproto) { 12494df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek NumArgs = nargs; 12504df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs = new Stmt*[NumArgs+1]; 12514df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs[RECEIVER] = (Expr*) ((uintptr_t) cls | IsClsMethDeclKnown); 12524df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek if (NumArgs) { 12534df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek for (unsigned i = 0; i != NumArgs; ++i) 12544df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); 12554df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek } 12564df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek LBracloc = LBrac; 12574df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek RBracloc = RBrac; 12584df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek} 12594df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek 12604df728e368fa1f65ffc57572fed613dcca5b4fe8Ted KremenekObjCMessageExpr::ClassInfo ObjCMessageExpr::getClassInfo() const { 12614df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek uintptr_t x = (uintptr_t) SubExprs[RECEIVER]; 12624df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek switch (x & Flags) { 12634df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek default: 12644df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek assert(false && "Invalid ObjCMessageExpr."); 12654df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek case IsInstMeth: 12664df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek return ClassInfo(0, 0); 12674df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek case IsClsMethDeclUnknown: 12684df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek return ClassInfo(0, (IdentifierInfo*) (x & ~Flags)); 12694df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek case IsClsMethDeclKnown: { 12704df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek ObjCInterfaceDecl* D = (ObjCInterfaceDecl*) (x & ~Flags); 12714df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek return ClassInfo(D, D->getIdentifier()); 12724df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek } 12734df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek } 12744df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek} 12754df728e368fa1f65ffc57572fed613dcca5b4fe8Ted Kremenek 127627437caadea35f84d550cd29f024fcf3ea240eecChris Lattnerbool ChooseExpr::isConditionTrue(ASTContext &C) const { 127732442bbc98bafa512fa42d46fedf60ed7d79f574Daniel Dunbar return getCond()->getIntegerConstantExprValue(C) != 0; 127827437caadea35f84d550cd29f024fcf3ea240eecChris Lattner} 127927437caadea35f84d550cd29f024fcf3ea240eecChris Lattner 1280670a62cd1d51042ea076cda5e93f26a1d8327fb3Chris Lattnerstatic int64_t evaluateOffsetOf(ASTContext& C, const Expr *E) { 12815a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { 12825a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson QualType Ty = ME->getBase()->getType(); 12835a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 12845a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson RecordDecl *RD = Ty->getAsRecordType()->getDecl(); 128598be4943e8dc4f3905629a7102668960873cf863Chris Lattner const ASTRecordLayout &RL = C.getASTRecordLayout(RD); 128686f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (FieldDecl *FD = dyn_cast<FieldDecl>(ME->getMemberDecl())) { 128786f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // FIXME: This is linear time. And the fact that we're indexing 128886f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // into the layout by position in the record means that we're 128986f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // either stuck numbering the fields in the AST or we have to keep 129086f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor // the linear search (yuck and yuck). 129186f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor unsigned i = 0; 129286f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor for (RecordDecl::field_iterator Field = RD->field_begin(), 129386f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor FieldEnd = RD->field_end(); 129486f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor Field != FieldEnd; (void)++Field, ++i) { 129586f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor if (*Field == FD) 129686f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor break; 129786f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor } 129886f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor 129986f194083504938df72135b5b66bf0c5cafd9498Douglas Gregor return RL.getFieldOffset(i) + evaluateOffsetOf(C, ME->getBase()); 13005a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson } 13015a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson } else if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) { 13025a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson const Expr *Base = ASE->getBase(); 13035a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 130498be4943e8dc4f3905629a7102668960873cf863Chris Lattner int64_t size = C.getTypeSize(ASE->getType()); 130532442bbc98bafa512fa42d46fedf60ed7d79f574Daniel Dunbar size *= ASE->getIdx()->getIntegerConstantExprValue(C).getSExtValue(); 13065a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 13075a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson return size + evaluateOffsetOf(C, Base); 13085a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson } else if (isa<CompoundLiteralExpr>(E)) 13095a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson return 0; 13105a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 13115a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson assert(0 && "Unknown offsetof subexpression!"); 13125a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson return 0; 13135a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson} 13145a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 13155a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlssonint64_t UnaryOperator::evaluateOffsetOf(ASTContext& C) const 13165a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson{ 13175a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson assert(Opc == OffsetOf && "Unary operator not offsetof!"); 13185a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 131998be4943e8dc4f3905629a7102668960873cf863Chris Lattner unsigned CharSize = C.Target.getCharWidth(); 13205549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return ::evaluateOffsetOf(C, cast<Expr>(Val)) / CharSize; 13215a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson} 13225a1deb8d9c0722beae28d693fa137bbb942bd11fAnders Carlsson 13230518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redlvoid SizeOfAlignOfExpr::Destroy(ASTContext& C) { 13240518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // Override default behavior of traversing children. If this has a type 13250518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // operand and the type is a variable-length array, the child iteration 13260518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // will iterate over the size expression. However, this expression belongs 13270518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // to the type, not to this, so we don't want to delete it. 13280518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // We still want to delete this expression. 13290518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // FIXME: Same as in Stmt::Destroy - will be eventually in ASTContext's 13300518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // pool allocator. 13310518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (isArgumentType()) 13320518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl delete this; 13330518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl else 13340518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl Expr::Destroy(C); 13359048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar} 13369048891ff983d0681c116c6e8f1073aa31bdd6e8Daniel Dunbar 133777ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek//===----------------------------------------------------------------------===// 1338ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek// ExprIterator. 1339ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek//===----------------------------------------------------------------------===// 1340ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek 1341ce2fc3a343ea6098a96d587071cee7299f11957aTed KremenekExpr* ExprIterator::operator[](size_t idx) { return cast<Expr>(I[idx]); } 1342ce2fc3a343ea6098a96d587071cee7299f11957aTed KremenekExpr* ExprIterator::operator*() const { return cast<Expr>(*I); } 1343ce2fc3a343ea6098a96d587071cee7299f11957aTed KremenekExpr* ExprIterator::operator->() const { return cast<Expr>(*I); } 1344ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenekconst Expr* ConstExprIterator::operator[](size_t idx) const { 1345ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek return cast<Expr>(I[idx]); 1346ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek} 1347ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenekconst Expr* ConstExprIterator::operator*() const { return cast<Expr>(*I); } 1348ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenekconst Expr* ConstExprIterator::operator->() const { return cast<Expr>(*I); } 1349ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek 1350ce2fc3a343ea6098a96d587071cee7299f11957aTed Kremenek//===----------------------------------------------------------------------===// 135177ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// Child Iterators for iterating over subexpressions/substatements 135277ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek//===----------------------------------------------------------------------===// 135377ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 135477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// DeclRefExpr 13559ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator DeclRefExpr::child_begin() { return child_iterator(); } 13569ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator DeclRefExpr::child_end() { return child_iterator(); } 135777ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 13587779db42c94405ecbd6ee45efb293483fa6cbeffSteve Naroff// ObjCIvarRefExpr 13595549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCIvarRefExpr::child_begin() { return &Base; } 13605549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCIvarRefExpr::child_end() { return &Base+1; } 13617779db42c94405ecbd6ee45efb293483fa6cbeffSteve Naroff 1362e3e9add4fd788927df6f545570e7838db59c01d7Steve Naroff// ObjCPropertyRefExpr 13635549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCPropertyRefExpr::child_begin() { return &Base; } 13645549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ObjCPropertyRefExpr::child_end() { return &Base+1; } 1365ae7840776d6cd31b4d7a4a345b61bcbb3744df6cSteve Naroff 13665daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian// ObjCKVCRefExpr 13675daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz JahanianStmt::child_iterator ObjCKVCRefExpr::child_begin() { return &Base; } 13685daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz JahanianStmt::child_iterator ObjCKVCRefExpr::child_end() { return &Base+1; } 13695daf570d0ce027e18ed5f9d66e6b2a14a40b720dFariborz Jahanian 1370cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas Gregor// ObjCSuperExpr 1371cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas GregorStmt::child_iterator ObjCSuperExpr::child_begin() { return child_iterator(); } 1372cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas GregorStmt::child_iterator ObjCSuperExpr::child_end() { return child_iterator(); } 1373cd9b46e5442a3ef17f83f75177d8545cb5b3e2b9Douglas Gregor 1374d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris Lattner// PredefinedExpr 1375d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris LattnerStmt::child_iterator PredefinedExpr::child_begin() { return child_iterator(); } 1376d9f6910f4ef37c0e8eeee2a01287d9572c3176efChris LattnerStmt::child_iterator PredefinedExpr::child_end() { return child_iterator(); } 137777ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 137877ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// IntegerLiteral 13799ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator IntegerLiteral::child_begin() { return child_iterator(); } 13809ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator IntegerLiteral::child_end() { return child_iterator(); } 138177ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 138277ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// CharacterLiteral 13839ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator CharacterLiteral::child_begin() { return child_iterator(); } 13849ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator CharacterLiteral::child_end() { return child_iterator(); } 138577ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 138677ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// FloatingLiteral 13879ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator FloatingLiteral::child_begin() { return child_iterator(); } 13889ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator FloatingLiteral::child_end() { return child_iterator(); } 138977ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 13905d66145eed1c319df5a69977cb8ff74f597ea544Chris Lattner// ImaginaryLiteral 13915549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ImaginaryLiteral::child_begin() { return &Val; } 13925549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ImaginaryLiteral::child_end() { return &Val+1; } 13935d66145eed1c319df5a69977cb8ff74f597ea544Chris Lattner 139477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// StringLiteral 13959ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator StringLiteral::child_begin() { return child_iterator(); } 13969ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator StringLiteral::child_end() { return child_iterator(); } 139777ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 139877ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// ParenExpr 13995549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ParenExpr::child_begin() { return &Val; } 14005549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ParenExpr::child_end() { return &Val+1; } 140177ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 140277ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// UnaryOperator 14035549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator UnaryOperator::child_begin() { return &Val; } 14045549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator UnaryOperator::child_end() { return &Val+1; } 140577ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 14060518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl// SizeOfAlignOfExpr 14070518999d3adcc289997bd974dce90cc97f5c1c44Sebastian RedlStmt::child_iterator SizeOfAlignOfExpr::child_begin() { 14080518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // If this is of a type and the type is a VLA type (and not a typedef), the 14090518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // size expression of the VLA needs to be treated as an executable expression. 14100518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl // Why isn't this weirdness documented better in StmtIterator? 14110518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (isArgumentType()) { 14120518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (VariableArrayType* T = dyn_cast<VariableArrayType>( 14130518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl getArgumentType().getTypePtr())) 14140518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return child_iterator(T); 14150518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return child_iterator(); 14160518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl } 1417d457589fc69dc7a9c80cd74d317c0b81a35a27c9Sebastian Redl return child_iterator(&Argument.Ex); 14189ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14190518999d3adcc289997bd974dce90cc97f5c1c44Sebastian RedlStmt::child_iterator SizeOfAlignOfExpr::child_end() { 14200518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl if (isArgumentType()) 14210518999d3adcc289997bd974dce90cc97f5c1c44Sebastian Redl return child_iterator(); 1422d457589fc69dc7a9c80cd74d317c0b81a35a27c9Sebastian Redl return child_iterator(&Argument.Ex + 1); 14239ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 142477ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 142577ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// ArraySubscriptExpr 14261237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ArraySubscriptExpr::child_begin() { 14275549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 142877ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 14291237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ArraySubscriptExpr::child_end() { 14305549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+END_EXPR; 143177ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 143277ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek 143377ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek// CallExpr 14341237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator CallExpr::child_begin() { 14355549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 143677ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 14371237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator CallExpr::child_end() { 14385549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+NumArgs+ARGS_START; 143977ed8e4edf6ed78c53fb20ec3210aff2a59c9d87Ted Kremenek} 14401237c673c07f9d827129ba02720108816abde562Ted Kremenek 14411237c673c07f9d827129ba02720108816abde562Ted Kremenek// MemberExpr 14425549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator MemberExpr::child_begin() { return &Base; } 14435549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator MemberExpr::child_end() { return &Base+1; } 14441237c673c07f9d827129ba02720108816abde562Ted Kremenek 1445213541a68a3e137d11d2cefb612c6cdb410d7e8eNate Begeman// ExtVectorElementExpr 14465549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ExtVectorElementExpr::child_begin() { return &Base; } 14475549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ExtVectorElementExpr::child_end() { return &Base+1; } 14481237c673c07f9d827129ba02720108816abde562Ted Kremenek 14491237c673c07f9d827129ba02720108816abde562Ted Kremenek// CompoundLiteralExpr 14505549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CompoundLiteralExpr::child_begin() { return &Init; } 14515549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CompoundLiteralExpr::child_end() { return &Init+1; } 14521237c673c07f9d827129ba02720108816abde562Ted Kremenek 14531237c673c07f9d827129ba02720108816abde562Ted Kremenek// CastExpr 14545549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CastExpr::child_begin() { return &Op; } 14555549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator CastExpr::child_end() { return &Op+1; } 14561237c673c07f9d827129ba02720108816abde562Ted Kremenek 14571237c673c07f9d827129ba02720108816abde562Ted Kremenek// BinaryOperator 14581237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator BinaryOperator::child_begin() { 14595549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 14601237c673c07f9d827129ba02720108816abde562Ted Kremenek} 14611237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator BinaryOperator::child_end() { 14625549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+END_EXPR; 14631237c673c07f9d827129ba02720108816abde562Ted Kremenek} 14641237c673c07f9d827129ba02720108816abde562Ted Kremenek 14651237c673c07f9d827129ba02720108816abde562Ted Kremenek// ConditionalOperator 14661237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ConditionalOperator::child_begin() { 14675549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 14681237c673c07f9d827129ba02720108816abde562Ted Kremenek} 14691237c673c07f9d827129ba02720108816abde562Ted KremenekStmt::child_iterator ConditionalOperator::child_end() { 14705549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+END_EXPR; 14711237c673c07f9d827129ba02720108816abde562Ted Kremenek} 14721237c673c07f9d827129ba02720108816abde562Ted Kremenek 14731237c673c07f9d827129ba02720108816abde562Ted Kremenek// AddrLabelExpr 14749ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator AddrLabelExpr::child_begin() { return child_iterator(); } 14759ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator AddrLabelExpr::child_end() { return child_iterator(); } 14761237c673c07f9d827129ba02720108816abde562Ted Kremenek 14771237c673c07f9d827129ba02720108816abde562Ted Kremenek// StmtExpr 14785549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator StmtExpr::child_begin() { return &SubStmt; } 14795549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator StmtExpr::child_end() { return &SubStmt+1; } 14801237c673c07f9d827129ba02720108816abde562Ted Kremenek 14811237c673c07f9d827129ba02720108816abde562Ted Kremenek// TypesCompatibleExpr 14829ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator TypesCompatibleExpr::child_begin() { 14839ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14849ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14859ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek 14869ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator TypesCompatibleExpr::child_end() { 14879ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 14889ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 14891237c673c07f9d827129ba02720108816abde562Ted Kremenek 14901237c673c07f9d827129ba02720108816abde562Ted Kremenek// ChooseExpr 14915549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ChooseExpr::child_begin() { return &SubExprs[0]; } 14925549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator ChooseExpr::child_end() { return &SubExprs[0]+END_EXPR; } 14932d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor 14942d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas Gregor// GNUNullExpr 14952d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas GregorStmt::child_iterator GNUNullExpr::child_begin() { return child_iterator(); } 14962d8b273470684a9cd47f0ce24743cc1f71ef7cbcDouglas GregorStmt::child_iterator GNUNullExpr::child_end() { return child_iterator(); } 14971237c673c07f9d827129ba02720108816abde562Ted Kremenek 1498e2ce1d9440186cf3332368291cd884a6e3ae8946Nate Begeman// OverloadExpr 14995549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator OverloadExpr::child_begin() { return &SubExprs[0]; } 15005549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator OverloadExpr::child_end() { return &SubExprs[0]+NumExprs; } 1501e2ce1d9440186cf3332368291cd884a6e3ae8946Nate Begeman 1502d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman// ShuffleVectorExpr 1503d38617c8a50f9729c254ab76cd359af797c6739bEli FriedmanStmt::child_iterator ShuffleVectorExpr::child_begin() { 15045549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]; 1505d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman} 1506d38617c8a50f9729c254ab76cd359af797c6739bEli FriedmanStmt::child_iterator ShuffleVectorExpr::child_end() { 15075549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+NumExprs; 1508d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman} 1509d38617c8a50f9729c254ab76cd359af797c6739bEli Friedman 15107c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson// VAArgExpr 15115549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator VAArgExpr::child_begin() { return &Val; } 15125549976193e34417d4474a5f4a514268ef6666c7Ted KremenekStmt::child_iterator VAArgExpr::child_end() { return &Val+1; } 15137c50aca2fe36f6daa9bf1c8c428f30e72f96470aAnders Carlsson 151466b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson// InitListExpr 151566b5a8a39088598c01a9fa6f032dc908612dc8ecAnders CarlssonStmt::child_iterator InitListExpr::child_begin() { 15165549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return InitExprs.size() ? &InitExprs[0] : 0; 151766b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson} 151866b5a8a39088598c01a9fa6f032dc908612dc8ecAnders CarlssonStmt::child_iterator InitListExpr::child_end() { 15195549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return InitExprs.size() ? &InitExprs[0] + InitExprs.size() : 0; 152066b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson} 152166b5a8a39088598c01a9fa6f032dc908612dc8ecAnders Carlsson 15221237c673c07f9d827129ba02720108816abde562Ted Kremenek// ObjCStringLiteral 15239ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCStringLiteral::child_begin() { 15249ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15259ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 15269ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCStringLiteral::child_end() { 15279ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15289ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 15291237c673c07f9d827129ba02720108816abde562Ted Kremenek 15301237c673c07f9d827129ba02720108816abde562Ted Kremenek// ObjCEncodeExpr 15319ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCEncodeExpr::child_begin() { return child_iterator(); } 15329ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCEncodeExpr::child_end() { return child_iterator(); } 15331237c673c07f9d827129ba02720108816abde562Ted Kremenek 1534b62f6813406a03bf8a371c4e46c9fad51d102121Fariborz Jahanian// ObjCSelectorExpr 15359ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCSelectorExpr::child_begin() { 15369ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15379ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 15389ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCSelectorExpr::child_end() { 15399ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15409ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 1541b62f6813406a03bf8a371c4e46c9fad51d102121Fariborz Jahanian 1542390d50a725497e99247dc104a7d2c2a255d3af14Fariborz Jahanian// ObjCProtocolExpr 15439ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCProtocolExpr::child_begin() { 15449ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15459ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 15469ac5928abeb3a47592201e1c30fe2930c20a507eTed KremenekStmt::child_iterator ObjCProtocolExpr::child_end() { 15479ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek return child_iterator(); 15489ac5928abeb3a47592201e1c30fe2930c20a507eTed Kremenek} 1549390d50a725497e99247dc104a7d2c2a255d3af14Fariborz Jahanian 1550563477da25f824e37c535131695dc4dc9b68c465Steve Naroff// ObjCMessageExpr 1551ea958e57a370b641c5a69347b75e9f8e3b5a41a2Ted KremenekStmt::child_iterator ObjCMessageExpr::child_begin() { 15525549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return getReceiver() ? &SubExprs[0] : &SubExprs[0] + ARGS_START; 1553563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1554563477da25f824e37c535131695dc4dc9b68c465Steve NaroffStmt::child_iterator ObjCMessageExpr::child_end() { 15555549976193e34417d4474a5f4a514268ef6666c7Ted Kremenek return &SubExprs[0]+ARGS_START+getNumArgs(); 1556563477da25f824e37c535131695dc4dc9b68c465Steve Naroff} 1557563477da25f824e37c535131695dc4dc9b68c465Steve Naroff 15584eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff// Blocks 155956ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve NaroffStmt::child_iterator BlockExpr::child_begin() { return child_iterator(); } 156056ee6896f2efebffb4a2cce5a7610cdf1eddbbbeSteve NaroffStmt::child_iterator BlockExpr::child_end() { return child_iterator(); } 15614eb206bebcdab28ababe8df55c6185cec2cdc071Steve Naroff 15629da13f9ddb2567e36f4bbee7b3c32f54aeb76d5bTed KremenekStmt::child_iterator BlockDeclRefExpr::child_begin() { return child_iterator();} 15639da13f9ddb2567e36f4bbee7b3c32f54aeb76d5bTed KremenekStmt::child_iterator BlockDeclRefExpr::child_end() { return child_iterator(); } 1564