Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- Expr.cpp - Expression AST Node Implementation --------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file implements the Expr class and subclasses. |
| 11 | // |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
Daniel Dunbar | c4a1dea | 2008-08-11 05:35:13 +0000 | [diff] [blame] | 14 | #include "clang/AST/Expr.h" |
Chris Lattner | a4d55d8 | 2008-10-06 06:40:35 +0000 | [diff] [blame] | 15 | #include "clang/AST/APValue.h" |
Chris Lattner | 2eadfb6 | 2007-07-15 23:32:58 +0000 | [diff] [blame] | 16 | #include "clang/AST/ASTContext.h" |
Chris Lattner | a4d55d8 | 2008-10-06 06:40:35 +0000 | [diff] [blame] | 17 | #include "clang/AST/DeclObjC.h" |
Douglas Gregor | 98cd599 | 2008-10-21 23:43:52 +0000 | [diff] [blame] | 18 | #include "clang/AST/DeclCXX.h" |
Daniel Dunbar | e91593e | 2008-08-11 04:54:23 +0000 | [diff] [blame] | 19 | #include "clang/AST/RecordLayout.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 20 | #include "clang/AST/StmtVisitor.h" |
Chris Lattner | da5a6b6 | 2007-11-27 18:22:04 +0000 | [diff] [blame] | 21 | #include "clang/Basic/TargetInfo.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 22 | using namespace clang; |
| 23 | |
| 24 | //===----------------------------------------------------------------------===// |
| 25 | // Primary Expressions. |
| 26 | //===----------------------------------------------------------------------===// |
| 27 | |
Chris Lattner | da8249e | 2008-06-07 22:13:43 +0000 | [diff] [blame] | 28 | /// getValueAsApproximateDouble - This returns the value as an inaccurate |
| 29 | /// double. Note that this may cause loss of precision, but is useful for |
| 30 | /// debugging dumps, etc. |
| 31 | double FloatingLiteral::getValueAsApproximateDouble() const { |
| 32 | llvm::APFloat V = getValue(); |
Dale Johannesen | ee5a700 | 2008-10-09 23:02:32 +0000 | [diff] [blame] | 33 | bool ignored; |
| 34 | V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven, |
| 35 | &ignored); |
Chris Lattner | da8249e | 2008-06-07 22:13:43 +0000 | [diff] [blame] | 36 | return V.convertToDouble(); |
| 37 | } |
| 38 | |
| 39 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 40 | StringLiteral::StringLiteral(const char *strData, unsigned byteLength, |
| 41 | bool Wide, QualType t, SourceLocation firstLoc, |
| 42 | SourceLocation lastLoc) : |
| 43 | Expr(StringLiteralClass, t) { |
| 44 | // OPTIMIZE: could allocate this appended to the StringLiteral. |
| 45 | char *AStrData = new char[byteLength]; |
| 46 | memcpy(AStrData, strData, byteLength); |
| 47 | StrData = AStrData; |
| 48 | ByteLength = byteLength; |
| 49 | IsWide = Wide; |
| 50 | firstTokLoc = firstLoc; |
| 51 | lastTokLoc = lastLoc; |
| 52 | } |
| 53 | |
| 54 | StringLiteral::~StringLiteral() { |
| 55 | delete[] StrData; |
| 56 | } |
| 57 | |
| 58 | bool UnaryOperator::isPostfix(Opcode Op) { |
| 59 | switch (Op) { |
| 60 | case PostInc: |
| 61 | case PostDec: |
| 62 | return true; |
| 63 | default: |
| 64 | return false; |
| 65 | } |
| 66 | } |
| 67 | |
Ted Kremenek | 5a56ac3 | 2008-07-23 22:18:43 +0000 | [diff] [blame] | 68 | bool UnaryOperator::isPrefix(Opcode Op) { |
| 69 | switch (Op) { |
| 70 | case PreInc: |
| 71 | case PreDec: |
| 72 | return true; |
| 73 | default: |
| 74 | return false; |
| 75 | } |
| 76 | } |
| 77 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 78 | /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it |
| 79 | /// corresponds to, e.g. "sizeof" or "[pre]++". |
| 80 | const char *UnaryOperator::getOpcodeStr(Opcode Op) { |
| 81 | switch (Op) { |
| 82 | default: assert(0 && "Unknown unary operator"); |
| 83 | case PostInc: return "++"; |
| 84 | case PostDec: return "--"; |
| 85 | case PreInc: return "++"; |
| 86 | case PreDec: return "--"; |
| 87 | case AddrOf: return "&"; |
| 88 | case Deref: return "*"; |
| 89 | case Plus: return "+"; |
| 90 | case Minus: return "-"; |
| 91 | case Not: return "~"; |
| 92 | case LNot: return "!"; |
| 93 | case Real: return "__real"; |
| 94 | case Imag: return "__imag"; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 95 | case Extension: return "__extension__"; |
Chris Lattner | 73d0d4f | 2007-08-30 17:45:32 +0000 | [diff] [blame] | 96 | case OffsetOf: return "__builtin_offsetof"; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 97 | } |
| 98 | } |
| 99 | |
| 100 | //===----------------------------------------------------------------------===// |
| 101 | // Postfix Operators. |
| 102 | //===----------------------------------------------------------------------===// |
| 103 | |
Douglas Gregor | b460980 | 2008-11-14 16:09:21 +0000 | [diff] [blame^] | 104 | CallExpr::CallExpr(StmtClass SC, Expr *fn, Expr **args, unsigned numargs, |
| 105 | QualType t, SourceLocation rparenloc) |
| 106 | : Expr(SC, t), NumArgs(numargs) { |
| 107 | SubExprs = new Stmt*[numargs+1]; |
| 108 | SubExprs[FN] = fn; |
| 109 | for (unsigned i = 0; i != numargs; ++i) |
| 110 | SubExprs[i+ARGS_START] = args[i]; |
| 111 | RParenLoc = rparenloc; |
| 112 | } |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 113 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 114 | CallExpr::CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t, |
| 115 | SourceLocation rparenloc) |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 116 | : Expr(CallExprClass, t), NumArgs(numargs) { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 117 | SubExprs = new Stmt*[numargs+1]; |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 118 | SubExprs[FN] = fn; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 119 | for (unsigned i = 0; i != numargs; ++i) |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 120 | SubExprs[i+ARGS_START] = args[i]; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 121 | RParenLoc = rparenloc; |
| 122 | } |
| 123 | |
Chris Lattner | d18b329 | 2007-12-28 05:25:02 +0000 | [diff] [blame] | 124 | /// setNumArgs - This changes the number of arguments present in this call. |
| 125 | /// Any orphaned expressions are deleted by this, and any new operands are set |
| 126 | /// to null. |
| 127 | void CallExpr::setNumArgs(unsigned NumArgs) { |
| 128 | // No change, just return. |
| 129 | if (NumArgs == getNumArgs()) return; |
| 130 | |
| 131 | // If shrinking # arguments, just delete the extras and forgot them. |
| 132 | if (NumArgs < getNumArgs()) { |
| 133 | for (unsigned i = NumArgs, e = getNumArgs(); i != e; ++i) |
| 134 | delete getArg(i); |
| 135 | this->NumArgs = NumArgs; |
| 136 | return; |
| 137 | } |
| 138 | |
| 139 | // Otherwise, we are growing the # arguments. New an bigger argument array. |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 140 | Stmt **NewSubExprs = new Stmt*[NumArgs+1]; |
Chris Lattner | d18b329 | 2007-12-28 05:25:02 +0000 | [diff] [blame] | 141 | // Copy over args. |
| 142 | for (unsigned i = 0; i != getNumArgs()+ARGS_START; ++i) |
| 143 | NewSubExprs[i] = SubExprs[i]; |
| 144 | // Null out new args. |
| 145 | for (unsigned i = getNumArgs()+ARGS_START; i != NumArgs+ARGS_START; ++i) |
| 146 | NewSubExprs[i] = 0; |
| 147 | |
| 148 | delete[] SubExprs; |
| 149 | SubExprs = NewSubExprs; |
| 150 | this->NumArgs = NumArgs; |
| 151 | } |
| 152 | |
Chris Lattner | cb88896 | 2008-10-06 05:00:53 +0000 | [diff] [blame] | 153 | /// isBuiltinCall - If this is a call to a builtin, return the builtin ID. If |
| 154 | /// not, return 0. |
| 155 | unsigned CallExpr::isBuiltinCall() const { |
Steve Naroff | c4f8e8b | 2008-01-31 01:07:12 +0000 | [diff] [blame] | 156 | // All simple function calls (e.g. func()) are implicitly cast to pointer to |
| 157 | // function. As a result, we try and obtain the DeclRefExpr from the |
| 158 | // ImplicitCastExpr. |
| 159 | const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee()); |
| 160 | if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()). |
Chris Lattner | cb88896 | 2008-10-06 05:00:53 +0000 | [diff] [blame] | 161 | return 0; |
| 162 | |
Steve Naroff | c4f8e8b | 2008-01-31 01:07:12 +0000 | [diff] [blame] | 163 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr()); |
| 164 | if (!DRE) |
Chris Lattner | cb88896 | 2008-10-06 05:00:53 +0000 | [diff] [blame] | 165 | return 0; |
| 166 | |
Anders Carlsson | bcba201 | 2008-01-31 02:13:57 +0000 | [diff] [blame] | 167 | const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl()); |
| 168 | if (!FDecl) |
Chris Lattner | cb88896 | 2008-10-06 05:00:53 +0000 | [diff] [blame] | 169 | return 0; |
| 170 | |
| 171 | return FDecl->getIdentifier()->getBuiltinID(); |
| 172 | } |
Anders Carlsson | bcba201 | 2008-01-31 02:13:57 +0000 | [diff] [blame] | 173 | |
Chris Lattner | cb88896 | 2008-10-06 05:00:53 +0000 | [diff] [blame] | 174 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 175 | /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it |
| 176 | /// corresponds to, e.g. "<<=". |
| 177 | const char *BinaryOperator::getOpcodeStr(Opcode Op) { |
| 178 | switch (Op) { |
| 179 | default: assert(0 && "Unknown binary operator"); |
| 180 | case Mul: return "*"; |
| 181 | case Div: return "/"; |
| 182 | case Rem: return "%"; |
| 183 | case Add: return "+"; |
| 184 | case Sub: return "-"; |
| 185 | case Shl: return "<<"; |
| 186 | case Shr: return ">>"; |
| 187 | case LT: return "<"; |
| 188 | case GT: return ">"; |
| 189 | case LE: return "<="; |
| 190 | case GE: return ">="; |
| 191 | case EQ: return "=="; |
| 192 | case NE: return "!="; |
| 193 | case And: return "&"; |
| 194 | case Xor: return "^"; |
| 195 | case Or: return "|"; |
| 196 | case LAnd: return "&&"; |
| 197 | case LOr: return "||"; |
| 198 | case Assign: return "="; |
| 199 | case MulAssign: return "*="; |
| 200 | case DivAssign: return "/="; |
| 201 | case RemAssign: return "%="; |
| 202 | case AddAssign: return "+="; |
| 203 | case SubAssign: return "-="; |
| 204 | case ShlAssign: return "<<="; |
| 205 | case ShrAssign: return ">>="; |
| 206 | case AndAssign: return "&="; |
| 207 | case XorAssign: return "^="; |
| 208 | case OrAssign: return "|="; |
| 209 | case Comma: return ","; |
| 210 | } |
| 211 | } |
| 212 | |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 213 | InitListExpr::InitListExpr(SourceLocation lbraceloc, |
Chris Lattner | 418f6c7 | 2008-10-26 23:43:26 +0000 | [diff] [blame] | 214 | Expr **initExprs, unsigned numInits, |
| 215 | SourceLocation rbraceloc, bool hadDesignators) |
Steve Naroff | c5ae899 | 2008-05-01 02:04:18 +0000 | [diff] [blame] | 216 | : Expr(InitListExprClass, QualType()), |
Chris Lattner | 418f6c7 | 2008-10-26 23:43:26 +0000 | [diff] [blame] | 217 | LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), HadDesignators(hadDesignators) { |
| 218 | |
| 219 | InitExprs.insert(InitExprs.end(), initExprs, initExprs+numInits); |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 220 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 221 | |
Steve Naroff | bfdcae6 | 2008-09-04 15:31:07 +0000 | [diff] [blame] | 222 | /// getFunctionType - Return the underlying function type for this block. |
Steve Naroff | 4eb206b | 2008-09-03 18:15:37 +0000 | [diff] [blame] | 223 | /// |
| 224 | const FunctionType *BlockExpr::getFunctionType() const { |
| 225 | return getType()->getAsBlockPointerType()-> |
| 226 | getPointeeType()->getAsFunctionType(); |
| 227 | } |
| 228 | |
Steve Naroff | 56ee689 | 2008-10-08 17:01:13 +0000 | [diff] [blame] | 229 | SourceLocation BlockExpr::getCaretLocation() const { |
| 230 | return TheBlock->getCaretLocation(); |
| 231 | } |
| 232 | const Stmt *BlockExpr::getBody() const { return TheBlock->getBody(); } |
| 233 | Stmt *BlockExpr::getBody() { return TheBlock->getBody(); } |
| 234 | |
| 235 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 236 | //===----------------------------------------------------------------------===// |
| 237 | // Generic Expression Routines |
| 238 | //===----------------------------------------------------------------------===// |
| 239 | |
| 240 | /// hasLocalSideEffect - Return true if this immediate expression has side |
| 241 | /// effects, not counting any sub-expressions. |
| 242 | bool Expr::hasLocalSideEffect() const { |
| 243 | switch (getStmtClass()) { |
| 244 | default: |
| 245 | return false; |
| 246 | case ParenExprClass: |
| 247 | return cast<ParenExpr>(this)->getSubExpr()->hasLocalSideEffect(); |
| 248 | case UnaryOperatorClass: { |
| 249 | const UnaryOperator *UO = cast<UnaryOperator>(this); |
| 250 | |
| 251 | switch (UO->getOpcode()) { |
| 252 | default: return false; |
| 253 | case UnaryOperator::PostInc: |
| 254 | case UnaryOperator::PostDec: |
| 255 | case UnaryOperator::PreInc: |
| 256 | case UnaryOperator::PreDec: |
| 257 | return true; // ++/-- |
| 258 | |
| 259 | case UnaryOperator::Deref: |
| 260 | // Dereferencing a volatile pointer is a side-effect. |
| 261 | return getType().isVolatileQualified(); |
| 262 | case UnaryOperator::Real: |
| 263 | case UnaryOperator::Imag: |
| 264 | // accessing a piece of a volatile complex is a side-effect. |
| 265 | return UO->getSubExpr()->getType().isVolatileQualified(); |
| 266 | |
| 267 | case UnaryOperator::Extension: |
| 268 | return UO->getSubExpr()->hasLocalSideEffect(); |
| 269 | } |
| 270 | } |
Chris Lattner | e7716e6 | 2007-12-01 06:07:34 +0000 | [diff] [blame] | 271 | case BinaryOperatorClass: { |
| 272 | const BinaryOperator *BinOp = cast<BinaryOperator>(this); |
| 273 | // Consider comma to have side effects if the LHS and RHS both do. |
| 274 | if (BinOp->getOpcode() == BinaryOperator::Comma) |
| 275 | return BinOp->getLHS()->hasLocalSideEffect() && |
| 276 | BinOp->getRHS()->hasLocalSideEffect(); |
| 277 | |
| 278 | return BinOp->isAssignmentOp(); |
| 279 | } |
Chris Lattner | eb14fe8 | 2007-08-25 02:00:02 +0000 | [diff] [blame] | 280 | case CompoundAssignOperatorClass: |
Chris Lattner | 1f683e9 | 2007-08-25 01:55:00 +0000 | [diff] [blame] | 281 | return true; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 282 | |
Fariborz Jahanian | ab38e4b | 2007-12-01 19:58:28 +0000 | [diff] [blame] | 283 | case ConditionalOperatorClass: { |
| 284 | const ConditionalOperator *Exp = cast<ConditionalOperator>(this); |
| 285 | return Exp->getCond()->hasLocalSideEffect() |
| 286 | || (Exp->getLHS() && Exp->getLHS()->hasLocalSideEffect()) |
| 287 | || (Exp->getRHS() && Exp->getRHS()->hasLocalSideEffect()); |
| 288 | } |
| 289 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 290 | case MemberExprClass: |
| 291 | case ArraySubscriptExprClass: |
| 292 | // If the base pointer or element is to a volatile pointer/field, accessing |
| 293 | // if is a side effect. |
| 294 | return getType().isVolatileQualified(); |
Eli Friedman | 211f6ad | 2008-05-27 15:24:04 +0000 | [diff] [blame] | 295 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 296 | case CallExprClass: |
Douglas Gregor | b460980 | 2008-11-14 16:09:21 +0000 | [diff] [blame^] | 297 | case CXXOperatorCallExprClass: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 298 | // TODO: check attributes for pure/const. "void foo() { strlen("bar"); }" |
| 299 | // should warn. |
| 300 | return true; |
Chris Lattner | a9c0102 | 2007-09-26 22:06:30 +0000 | [diff] [blame] | 301 | case ObjCMessageExprClass: |
| 302 | return true; |
Chris Lattner | 611b2ec | 2008-07-26 19:51:01 +0000 | [diff] [blame] | 303 | case StmtExprClass: { |
| 304 | // Statement exprs don't logically have side effects themselves, but are |
| 305 | // sometimes used in macros in ways that give them a type that is unused. |
| 306 | // For example ({ blah; foo(); }) will end up with a type if foo has a type. |
| 307 | // however, if the result of the stmt expr is dead, we don't want to emit a |
| 308 | // warning. |
| 309 | const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt(); |
| 310 | if (!CS->body_empty()) |
| 311 | if (const Expr *E = dyn_cast<Expr>(CS->body_back())) |
| 312 | return E->hasLocalSideEffect(); |
| 313 | return false; |
| 314 | } |
Douglas Gregor | 6eec8e8 | 2008-10-28 15:36:24 +0000 | [diff] [blame] | 315 | case CStyleCastExprClass: |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 316 | case CXXFunctionalCastExprClass: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 317 | // If this is a cast to void, check the operand. Otherwise, the result of |
| 318 | // the cast is unused. |
| 319 | if (getType()->isVoidType()) |
| 320 | return cast<CastExpr>(this)->getSubExpr()->hasLocalSideEffect(); |
| 321 | return false; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 322 | |
Eli Friedman | 4be1f47 | 2008-05-19 21:24:43 +0000 | [diff] [blame] | 323 | case ImplicitCastExprClass: |
| 324 | // Check the operand, since implicit casts are inserted by Sema |
| 325 | return cast<ImplicitCastExpr>(this)->getSubExpr()->hasLocalSideEffect(); |
| 326 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 327 | case CXXDefaultArgExprClass: |
| 328 | return cast<CXXDefaultArgExpr>(this)->getExpr()->hasLocalSideEffect(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 329 | } |
| 330 | } |
| 331 | |
Douglas Gregor | ba7e210 | 2008-10-22 15:04:37 +0000 | [diff] [blame] | 332 | /// DeclCanBeLvalue - Determine whether the given declaration can be |
| 333 | /// an lvalue. This is a helper routine for isLvalue. |
| 334 | static bool DeclCanBeLvalue(const NamedDecl *Decl, ASTContext &Ctx) { |
Argyrios Kyrtzidis | 90b7bc6 | 2008-10-22 21:00:29 +0000 | [diff] [blame] | 335 | return isa<VarDecl>(Decl) || isa<CXXFieldDecl>(Decl) || |
Douglas Gregor | ba7e210 | 2008-10-22 15:04:37 +0000 | [diff] [blame] | 336 | // C++ 3.10p2: An lvalue refers to an object or function. |
| 337 | (Ctx.getLangOptions().CPlusPlus && |
| 338 | (isa<FunctionDecl>(Decl) || isa<OverloadedFunctionDecl>(Decl))); |
| 339 | } |
| 340 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 341 | /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or an |
| 342 | /// incomplete type other than void. Nonarray expressions that can be lvalues: |
| 343 | /// - name, where name must be a variable |
| 344 | /// - e[i] |
| 345 | /// - (e), where e must be an lvalue |
| 346 | /// - e.name, where e must be an lvalue |
| 347 | /// - e->name |
| 348 | /// - *e, the type of e cannot be a function type |
| 349 | /// - string-constant |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 350 | /// - (__real__ e) and (__imag__ e) where e is an lvalue [GNU extension] |
Bill Wendling | 08ad47c | 2007-07-17 03:52:31 +0000 | [diff] [blame] | 351 | /// - reference type [C++ [expr]] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 352 | /// |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 353 | Expr::isLvalueResult Expr::isLvalue(ASTContext &Ctx) const { |
Douglas Gregor | 98cd599 | 2008-10-21 23:43:52 +0000 | [diff] [blame] | 354 | // first, check the type (C99 6.3.2.1). Expressions with function |
| 355 | // type in C are not lvalues, but they can be lvalues in C++. |
| 356 | if (!Ctx.getLangOptions().CPlusPlus && TR->isFunctionType()) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 357 | return LV_NotObjectType; |
| 358 | |
Steve Naroff | acb818a | 2008-02-10 01:39:04 +0000 | [diff] [blame] | 359 | // Allow qualified void which is an incomplete type other than void (yuck). |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 360 | if (TR->isVoidType() && !Ctx.getCanonicalType(TR).getCVRQualifiers()) |
Steve Naroff | acb818a | 2008-02-10 01:39:04 +0000 | [diff] [blame] | 361 | return LV_IncompleteVoidType; |
| 362 | |
Douglas Gregor | 98cd599 | 2008-10-21 23:43:52 +0000 | [diff] [blame] | 363 | /// FIXME: Expressions can't have reference type, so the following |
| 364 | /// isn't needed. |
Chris Lattner | cb4f9a6 | 2007-07-21 05:33:26 +0000 | [diff] [blame] | 365 | if (TR->isReferenceType()) // C++ [expr] |
Bill Wendling | 08ad47c | 2007-07-17 03:52:31 +0000 | [diff] [blame] | 366 | return LV_Valid; |
| 367 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 368 | // the type looks fine, now check the expression |
| 369 | switch (getStmtClass()) { |
| 370 | case StringLiteralClass: // C99 6.5.1p4 |
Anders Carlsson | 7323a62 | 2007-11-30 22:47:59 +0000 | [diff] [blame] | 371 | return LV_Valid; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 372 | case ArraySubscriptExprClass: // C99 6.5.3p4 (e1[e2] == (*((e1)+(e2)))) |
| 373 | // For vectors, make sure base is an lvalue (i.e. not a function call). |
| 374 | if (cast<ArraySubscriptExpr>(this)->getBase()->getType()->isVectorType()) |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 375 | return cast<ArraySubscriptExpr>(this)->getBase()->isLvalue(Ctx); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 376 | return LV_Valid; |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 377 | case DeclRefExprClass: { // C99 6.5.1p2 |
Douglas Gregor | ba7e210 | 2008-10-22 15:04:37 +0000 | [diff] [blame] | 378 | const NamedDecl *RefdDecl = cast<DeclRefExpr>(this)->getDecl(); |
| 379 | if (DeclCanBeLvalue(RefdDecl, Ctx)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 380 | return LV_Valid; |
| 381 | break; |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 382 | } |
Steve Naroff | dd972f2 | 2008-09-05 22:11:13 +0000 | [diff] [blame] | 383 | case BlockDeclRefExprClass: { |
| 384 | const BlockDeclRefExpr *BDR = cast<BlockDeclRefExpr>(this); |
Steve Naroff | 4f6a7d7 | 2008-09-26 14:41:28 +0000 | [diff] [blame] | 385 | if (isa<VarDecl>(BDR->getDecl())) |
Steve Naroff | dd972f2 | 2008-09-05 22:11:13 +0000 | [diff] [blame] | 386 | return LV_Valid; |
| 387 | break; |
| 388 | } |
Anton Korobeynikov | fdd7566 | 2007-07-12 15:26:50 +0000 | [diff] [blame] | 389 | case MemberExprClass: { // C99 6.5.2.3p4 |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 390 | const MemberExpr *m = cast<MemberExpr>(this); |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 391 | return m->isArrow() ? LV_Valid : m->getBase()->isLvalue(Ctx); |
Anton Korobeynikov | fdd7566 | 2007-07-12 15:26:50 +0000 | [diff] [blame] | 392 | } |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 393 | case UnaryOperatorClass: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 394 | if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Deref) |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 395 | return LV_Valid; // C99 6.5.3p4 |
| 396 | |
| 397 | if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Real || |
Chris Lattner | baf0d66 | 2008-07-25 18:07:19 +0000 | [diff] [blame] | 398 | cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Imag || |
| 399 | cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Extension) |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 400 | return cast<UnaryOperator>(this)->getSubExpr()->isLvalue(Ctx); // GNU. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 401 | break; |
Douglas Gregor | eb8f306 | 2008-11-12 17:17:38 +0000 | [diff] [blame] | 402 | case ImplicitCastExprClass: |
| 403 | return cast<ImplicitCastExpr>(this)->isLvalueCast()? LV_Valid |
| 404 | : LV_InvalidExpression; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 405 | case ParenExprClass: // C99 6.5.1p5 |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 406 | return cast<ParenExpr>(this)->getSubExpr()->isLvalue(Ctx); |
Douglas Gregor | eb8f306 | 2008-11-12 17:17:38 +0000 | [diff] [blame] | 407 | case BinaryOperatorClass: |
| 408 | case CompoundAssignOperatorClass: { |
| 409 | const BinaryOperator *BinOp = cast<BinaryOperator>(this); |
Douglas Gregor | bf3af05 | 2008-11-13 20:12:29 +0000 | [diff] [blame] | 410 | if (!BinOp->isAssignmentOp()) |
Douglas Gregor | eb8f306 | 2008-11-12 17:17:38 +0000 | [diff] [blame] | 411 | return LV_InvalidExpression; |
| 412 | |
Douglas Gregor | bf3af05 | 2008-11-13 20:12:29 +0000 | [diff] [blame] | 413 | if (Ctx.getLangOptions().CPlusPlus) |
| 414 | // C++ [expr.ass]p1: |
| 415 | // The result of an assignment operation [...] is an lvalue. |
| 416 | return LV_Valid; |
| 417 | |
| 418 | |
| 419 | // C99 6.5.16: |
| 420 | // An assignment expression [...] is not an lvalue. |
| 421 | return LV_InvalidExpression; |
Douglas Gregor | eb8f306 | 2008-11-12 17:17:38 +0000 | [diff] [blame] | 422 | } |
Douglas Gregor | b460980 | 2008-11-14 16:09:21 +0000 | [diff] [blame^] | 423 | case CallExprClass: |
| 424 | case CXXOperatorCallExprClass: { |
Douglas Gregor | 9d293df | 2008-10-28 00:22:11 +0000 | [diff] [blame] | 425 | // C++ [expr.call]p10: |
| 426 | // A function call is an lvalue if and only if the result type |
| 427 | // is a reference. |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 428 | QualType CalleeType = cast<CallExpr>(this)->getCallee()->getType(); |
Douglas Gregor | 9d293df | 2008-10-28 00:22:11 +0000 | [diff] [blame] | 429 | if (const PointerType *FnTypePtr = CalleeType->getAsPointerType()) |
| 430 | if (const FunctionType *FnType |
| 431 | = FnTypePtr->getPointeeType()->getAsFunctionType()) |
| 432 | if (FnType->getResultType()->isReferenceType()) |
| 433 | return LV_Valid; |
| 434 | |
| 435 | break; |
| 436 | } |
Steve Naroff | e638639 | 2007-12-05 04:00:10 +0000 | [diff] [blame] | 437 | case CompoundLiteralExprClass: // C99 6.5.2.5p5 |
| 438 | return LV_Valid; |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 439 | case ExtVectorElementExprClass: |
| 440 | if (cast<ExtVectorElementExpr>(this)->containsDuplicateElements()) |
Steve Naroff | fec0b49 | 2007-07-30 03:29:09 +0000 | [diff] [blame] | 441 | return LV_DuplicateVectorComponents; |
| 442 | return LV_Valid; |
Steve Naroff | 027282d | 2007-11-12 14:34:27 +0000 | [diff] [blame] | 443 | case ObjCIvarRefExprClass: // ObjC instance variables are lvalues. |
| 444 | return LV_Valid; |
Steve Naroff | 799a6a6 | 2008-05-30 23:23:16 +0000 | [diff] [blame] | 445 | case ObjCPropertyRefExprClass: // FIXME: check if read-only property. |
| 446 | return LV_Valid; |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 447 | case PredefinedExprClass: |
Douglas Gregor | 796da18 | 2008-11-04 14:32:21 +0000 | [diff] [blame] | 448 | return LV_Valid; |
Douglas Gregor | 9d293df | 2008-10-28 00:22:11 +0000 | [diff] [blame] | 449 | case VAArgExprClass: |
| 450 | return LV_Valid; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 451 | case CXXDefaultArgExprClass: |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 452 | return cast<CXXDefaultArgExpr>(this)->getExpr()->isLvalue(Ctx); |
Argyrios Kyrtzidis | 24b41fa | 2008-09-11 04:22:26 +0000 | [diff] [blame] | 453 | case CXXConditionDeclExprClass: |
| 454 | return LV_Valid; |
Douglas Gregor | 6eec8e8 | 2008-10-28 15:36:24 +0000 | [diff] [blame] | 455 | case CStyleCastExprClass: |
Douglas Gregor | 9d293df | 2008-10-28 00:22:11 +0000 | [diff] [blame] | 456 | case CXXFunctionalCastExprClass: |
| 457 | case CXXStaticCastExprClass: |
| 458 | case CXXDynamicCastExprClass: |
| 459 | case CXXReinterpretCastExprClass: |
| 460 | case CXXConstCastExprClass: |
| 461 | // The result of an explicit cast is an lvalue if the type we are |
| 462 | // casting to is a reference type. See C++ [expr.cast]p1, |
| 463 | // C++ [expr.static.cast]p2, C++ [expr.dynamic.cast]p2, |
| 464 | // C++ [expr.reinterpret.cast]p1, C++ [expr.const.cast]p1. |
| 465 | if (cast<ExplicitCastExpr>(this)->getTypeAsWritten()->isReferenceType()) |
| 466 | return LV_Valid; |
| 467 | break; |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 468 | case CXXTypeidExprClass: |
| 469 | // C++ 5.2.8p1: The result of a typeid expression is an lvalue of ... |
| 470 | return LV_Valid; |
Douglas Gregor | 796da18 | 2008-11-04 14:32:21 +0000 | [diff] [blame] | 471 | case CXXThisExprClass: |
| 472 | return LV_InvalidExpression; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 473 | default: |
| 474 | break; |
| 475 | } |
| 476 | return LV_InvalidExpression; |
| 477 | } |
| 478 | |
| 479 | /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, |
| 480 | /// does not have an incomplete type, does not have a const-qualified type, and |
| 481 | /// if it is a structure or union, does not have any member (including, |
| 482 | /// recursively, any member or element of all contained aggregates or unions) |
| 483 | /// with a const-qualified type. |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 484 | Expr::isModifiableLvalueResult Expr::isModifiableLvalue(ASTContext &Ctx) const { |
| 485 | isLvalueResult lvalResult = isLvalue(Ctx); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 486 | |
| 487 | switch (lvalResult) { |
Douglas Gregor | ae8d467 | 2008-10-22 00:03:08 +0000 | [diff] [blame] | 488 | case LV_Valid: |
| 489 | // C++ 3.10p11: Functions cannot be modified, but pointers to |
| 490 | // functions can be modifiable. |
| 491 | if (Ctx.getLangOptions().CPlusPlus && TR->isFunctionType()) |
| 492 | return MLV_NotObjectType; |
| 493 | break; |
| 494 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 495 | case LV_NotObjectType: return MLV_NotObjectType; |
| 496 | case LV_IncompleteVoidType: return MLV_IncompleteVoidType; |
Steve Naroff | fec0b49 | 2007-07-30 03:29:09 +0000 | [diff] [blame] | 497 | case LV_DuplicateVectorComponents: return MLV_DuplicateVectorComponents; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 498 | case LV_InvalidExpression: return MLV_InvalidExpression; |
| 499 | } |
Chris Lattner | c63a1f2 | 2008-08-04 07:31:14 +0000 | [diff] [blame] | 500 | |
| 501 | QualType CT = Ctx.getCanonicalType(getType()); |
| 502 | |
| 503 | if (CT.isConstQualified()) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 504 | return MLV_ConstQualified; |
Chris Lattner | c63a1f2 | 2008-08-04 07:31:14 +0000 | [diff] [blame] | 505 | if (CT->isArrayType()) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 506 | return MLV_ArrayType; |
Chris Lattner | c63a1f2 | 2008-08-04 07:31:14 +0000 | [diff] [blame] | 507 | if (CT->isIncompleteType()) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 508 | return MLV_IncompleteType; |
| 509 | |
Chris Lattner | c63a1f2 | 2008-08-04 07:31:14 +0000 | [diff] [blame] | 510 | if (const RecordType *r = CT->getAsRecordType()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 511 | if (r->hasConstFields()) |
| 512 | return MLV_ConstQualified; |
| 513 | } |
Steve Naroff | 4f6a7d7 | 2008-09-26 14:41:28 +0000 | [diff] [blame] | 514 | // The following is illegal: |
| 515 | // void takeclosure(void (^C)(void)); |
| 516 | // void func() { int x = 1; takeclosure(^{ x = 7 }); } |
| 517 | // |
| 518 | if (getStmtClass() == BlockDeclRefExprClass) { |
| 519 | const BlockDeclRefExpr *BDR = cast<BlockDeclRefExpr>(this); |
| 520 | if (!BDR->isByRef() && isa<VarDecl>(BDR->getDecl())) |
| 521 | return MLV_NotBlockQualified; |
| 522 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 523 | return MLV_Valid; |
| 524 | } |
| 525 | |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 526 | /// hasGlobalStorage - Return true if this expression has static storage |
Chris Lattner | 4cc6271 | 2007-11-27 21:35:27 +0000 | [diff] [blame] | 527 | /// duration. This means that the address of this expression is a link-time |
| 528 | /// constant. |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 529 | bool Expr::hasGlobalStorage() const { |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 530 | switch (getStmtClass()) { |
| 531 | default: |
| 532 | return false; |
Chris Lattner | 4cc6271 | 2007-11-27 21:35:27 +0000 | [diff] [blame] | 533 | case ParenExprClass: |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 534 | return cast<ParenExpr>(this)->getSubExpr()->hasGlobalStorage(); |
Chris Lattner | 4cc6271 | 2007-11-27 21:35:27 +0000 | [diff] [blame] | 535 | case ImplicitCastExprClass: |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 536 | return cast<ImplicitCastExpr>(this)->getSubExpr()->hasGlobalStorage(); |
Steve Naroff | e9b1219 | 2008-01-14 18:19:28 +0000 | [diff] [blame] | 537 | case CompoundLiteralExprClass: |
| 538 | return cast<CompoundLiteralExpr>(this)->isFileScope(); |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 539 | case DeclRefExprClass: { |
| 540 | const Decl *D = cast<DeclRefExpr>(this)->getDecl(); |
| 541 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 542 | return VD->hasGlobalStorage(); |
Seo Sanghyeon | 63f067f | 2008-04-04 09:45:30 +0000 | [diff] [blame] | 543 | if (isa<FunctionDecl>(D)) |
| 544 | return true; |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 545 | return false; |
| 546 | } |
Chris Lattner | fb70806 | 2007-11-28 04:30:09 +0000 | [diff] [blame] | 547 | case MemberExprClass: { |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 548 | const MemberExpr *M = cast<MemberExpr>(this); |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 549 | return !M->isArrow() && M->getBase()->hasGlobalStorage(); |
Chris Lattner | fb70806 | 2007-11-28 04:30:09 +0000 | [diff] [blame] | 550 | } |
Chris Lattner | 4cc6271 | 2007-11-27 21:35:27 +0000 | [diff] [blame] | 551 | case ArraySubscriptExprClass: |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 552 | return cast<ArraySubscriptExpr>(this)->getBase()->hasGlobalStorage(); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 553 | case PredefinedExprClass: |
Chris Lattner | fa28b30 | 2008-01-12 08:14:25 +0000 | [diff] [blame] | 554 | return true; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 555 | case CXXDefaultArgExprClass: |
| 556 | return cast<CXXDefaultArgExpr>(this)->getExpr()->hasGlobalStorage(); |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 557 | } |
| 558 | } |
| 559 | |
Ted Kremenek | 4e99a5f | 2008-01-17 16:57:34 +0000 | [diff] [blame] | 560 | Expr* Expr::IgnoreParens() { |
| 561 | Expr* E = this; |
| 562 | while (ParenExpr* P = dyn_cast<ParenExpr>(E)) |
| 563 | E = P->getSubExpr(); |
| 564 | |
| 565 | return E; |
| 566 | } |
| 567 | |
Chris Lattner | 56f3494 | 2008-02-13 01:02:39 +0000 | [diff] [blame] | 568 | /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr |
| 569 | /// or CastExprs or ImplicitCastExprs, returning their operand. |
| 570 | Expr *Expr::IgnoreParenCasts() { |
| 571 | Expr *E = this; |
| 572 | while (true) { |
| 573 | if (ParenExpr *P = dyn_cast<ParenExpr>(E)) |
| 574 | E = P->getSubExpr(); |
| 575 | else if (CastExpr *P = dyn_cast<CastExpr>(E)) |
| 576 | E = P->getSubExpr(); |
Chris Lattner | 56f3494 | 2008-02-13 01:02:39 +0000 | [diff] [blame] | 577 | else |
| 578 | return E; |
| 579 | } |
| 580 | } |
| 581 | |
| 582 | |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 583 | bool Expr::isConstantExpr(ASTContext &Ctx, SourceLocation *Loc) const { |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 584 | switch (getStmtClass()) { |
| 585 | default: |
| 586 | if (Loc) *Loc = getLocStart(); |
| 587 | return false; |
| 588 | case ParenExprClass: |
| 589 | return cast<ParenExpr>(this)->getSubExpr()->isConstantExpr(Ctx, Loc); |
| 590 | case StringLiteralClass: |
Steve Naroff | 5d37e32 | 2007-11-09 15:00:03 +0000 | [diff] [blame] | 591 | case ObjCStringLiteralClass: |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 592 | case FloatingLiteralClass: |
| 593 | case IntegerLiteralClass: |
| 594 | case CharacterLiteralClass: |
| 595 | case ImaginaryLiteralClass: |
Anders Carlsson | 1a86b33 | 2007-10-17 00:52:43 +0000 | [diff] [blame] | 596 | case TypesCompatibleExprClass: |
| 597 | case CXXBoolLiteralExprClass: |
Anders Carlsson | 15425f9 | 2008-08-23 18:49:32 +0000 | [diff] [blame] | 598 | case AddrLabelExprClass: |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 599 | return true; |
Douglas Gregor | b460980 | 2008-11-14 16:09:21 +0000 | [diff] [blame^] | 600 | case CallExprClass: |
| 601 | case CXXOperatorCallExprClass: { |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 602 | const CallExpr *CE = cast<CallExpr>(this); |
Chris Lattner | 45b6b9d | 2008-10-06 06:49:02 +0000 | [diff] [blame] | 603 | |
| 604 | // Allow any constant foldable calls to builtins. |
| 605 | if (CE->isBuiltinCall() && CE->isEvaluatable(Ctx)) |
Steve Naroff | c4f8e8b | 2008-01-31 01:07:12 +0000 | [diff] [blame] | 606 | return true; |
Chris Lattner | 45b6b9d | 2008-10-06 06:49:02 +0000 | [diff] [blame] | 607 | |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 608 | if (Loc) *Loc = getLocStart(); |
| 609 | return false; |
| 610 | } |
Chris Lattner | 4ef8dd6 | 2007-11-01 02:45:17 +0000 | [diff] [blame] | 611 | case DeclRefExprClass: { |
| 612 | const Decl *D = cast<DeclRefExpr>(this)->getDecl(); |
| 613 | // Accept address of function. |
| 614 | if (isa<EnumConstantDecl>(D) || isa<FunctionDecl>(D)) |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 615 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 616 | if (Loc) *Loc = getLocStart(); |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 617 | if (isa<VarDecl>(D)) |
| 618 | return TR->isArrayType(); |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 619 | return false; |
Chris Lattner | 4ef8dd6 | 2007-11-01 02:45:17 +0000 | [diff] [blame] | 620 | } |
Steve Naroff | b8f13a8 | 2008-01-09 00:05:37 +0000 | [diff] [blame] | 621 | case CompoundLiteralExprClass: |
| 622 | if (Loc) *Loc = getLocStart(); |
| 623 | // Allow "(int []){2,4}", since the array will be converted to a pointer. |
Nate Begeman | d47d4f5 | 2008-01-25 05:34:48 +0000 | [diff] [blame] | 624 | // Allow "(vector type){2,4}" since the elements are all constant. |
| 625 | return TR->isArrayType() || TR->isVectorType(); |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 626 | case UnaryOperatorClass: { |
| 627 | const UnaryOperator *Exp = cast<UnaryOperator>(this); |
| 628 | |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 629 | // C99 6.6p9 |
Chris Lattner | 239c15e | 2007-12-11 23:11:17 +0000 | [diff] [blame] | 630 | if (Exp->getOpcode() == UnaryOperator::AddrOf) { |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 631 | if (!Exp->getSubExpr()->hasGlobalStorage()) { |
Chris Lattner | 239c15e | 2007-12-11 23:11:17 +0000 | [diff] [blame] | 632 | if (Loc) *Loc = getLocStart(); |
| 633 | return false; |
| 634 | } |
| 635 | return true; |
| 636 | } |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 637 | |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 638 | // Get the operand value. If this is sizeof/alignof, do not evalute the |
| 639 | // operand. This affects C99 6.6p3. |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 640 | if (Exp->getOpcode() != UnaryOperator::OffsetOf && |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 641 | !Exp->getSubExpr()->isConstantExpr(Ctx, Loc)) |
| 642 | return false; |
| 643 | |
| 644 | switch (Exp->getOpcode()) { |
| 645 | // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. |
| 646 | // See C99 6.6p3. |
| 647 | default: |
| 648 | if (Loc) *Loc = Exp->getOperatorLoc(); |
| 649 | return false; |
| 650 | case UnaryOperator::Extension: |
| 651 | return true; // FIXME: this is wrong. |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 652 | case UnaryOperator::OffsetOf: |
Eli Friedman | 3c2b317 | 2008-02-15 12:20:59 +0000 | [diff] [blame] | 653 | if (!Exp->getSubExpr()->getType()->isConstantSizeType()) { |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 654 | if (Loc) *Loc = Exp->getOperatorLoc(); |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 655 | return false; |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 656 | } |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 657 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 658 | case UnaryOperator::LNot: |
| 659 | case UnaryOperator::Plus: |
| 660 | case UnaryOperator::Minus: |
| 661 | case UnaryOperator::Not: |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 662 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 663 | } |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 664 | } |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 665 | case SizeOfAlignOfExprClass: { |
| 666 | const SizeOfAlignOfExpr *Exp = cast<SizeOfAlignOfExpr>(this); |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 667 | // alignof always evaluates to a constant. |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 668 | if (Exp->isSizeOf()) { |
| 669 | QualType ArgTy = Exp->getTypeOfArgument(); |
| 670 | if (!ArgTy->isVoidType() && !ArgTy->isConstantSizeType()) { |
| 671 | if (Loc) *Loc = Exp->getOperatorLoc(); |
| 672 | return false; |
| 673 | } |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 674 | } |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 675 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 676 | } |
| 677 | case BinaryOperatorClass: { |
| 678 | const BinaryOperator *Exp = cast<BinaryOperator>(this); |
| 679 | |
| 680 | // The LHS of a constant expr is always evaluated and needed. |
| 681 | if (!Exp->getLHS()->isConstantExpr(Ctx, Loc)) |
| 682 | return false; |
| 683 | |
| 684 | if (!Exp->getRHS()->isConstantExpr(Ctx, Loc)) |
| 685 | return false; |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 686 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 687 | } |
| 688 | case ImplicitCastExprClass: |
Douglas Gregor | 6eec8e8 | 2008-10-28 15:36:24 +0000 | [diff] [blame] | 689 | case CStyleCastExprClass: |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 690 | case CXXFunctionalCastExprClass: { |
Argyrios Kyrtzidis | 0835a3c | 2008-08-18 23:01:59 +0000 | [diff] [blame] | 691 | const Expr *SubExpr = cast<CastExpr>(this)->getSubExpr(); |
| 692 | SourceLocation CastLoc = getLocStart(); |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 693 | if (!SubExpr->isConstantExpr(Ctx, Loc)) { |
| 694 | if (Loc) *Loc = SubExpr->getLocStart(); |
| 695 | return false; |
| 696 | } |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 697 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 698 | } |
| 699 | case ConditionalOperatorClass: { |
| 700 | const ConditionalOperator *Exp = cast<ConditionalOperator>(this); |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 701 | if (!Exp->getCond()->isConstantExpr(Ctx, Loc) || |
Anders Carlsson | 3907323 | 2007-11-30 19:04:31 +0000 | [diff] [blame] | 702 | // Handle the GNU extension for missing LHS. |
| 703 | !(Exp->getLHS() && Exp->getLHS()->isConstantExpr(Ctx, Loc)) || |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 704 | !Exp->getRHS()->isConstantExpr(Ctx, Loc)) |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 705 | return false; |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 706 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 707 | } |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 708 | case InitListExprClass: { |
| 709 | const InitListExpr *Exp = cast<InitListExpr>(this); |
| 710 | unsigned numInits = Exp->getNumInits(); |
| 711 | for (unsigned i = 0; i < numInits; i++) { |
| 712 | if (!Exp->getInit(i)->isConstantExpr(Ctx, Loc)) { |
| 713 | if (Loc) *Loc = Exp->getInit(i)->getLocStart(); |
| 714 | return false; |
| 715 | } |
| 716 | } |
| 717 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 718 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 719 | case CXXDefaultArgExprClass: |
| 720 | return cast<CXXDefaultArgExpr>(this)->getExpr()->isConstantExpr(Ctx, Loc); |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 721 | } |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 722 | } |
| 723 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 724 | /// isIntegerConstantExpr - this recursive routine will test if an expression is |
| 725 | /// an integer constant expression. Note: With the introduction of VLA's in |
| 726 | /// C99 the result of the sizeof operator is no longer always a constant |
| 727 | /// expression. The generalization of the wording to include any subexpression |
| 728 | /// that is not evaluated (C99 6.6p3) means that nonconstant subexpressions |
| 729 | /// can appear as operands to other operators (e.g. &&, ||, ?:). For instance, |
Nuno Lopes | 5f6b632 | 2008-07-08 21:13:06 +0000 | [diff] [blame] | 730 | /// "0 || f()" can be treated as a constant expression. In C90 this expression, |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 731 | /// occurring in a context requiring a constant, would have been a constraint |
| 732 | /// violation. FIXME: This routine currently implements C90 semantics. |
| 733 | /// To properly implement C99 semantics this routine will need to evaluate |
| 734 | /// expressions involving operators previously mentioned. |
| 735 | |
| 736 | /// FIXME: Pass up a reason why! Invalid operation in i-c-e, division by zero, |
| 737 | /// comma, etc |
| 738 | /// |
| 739 | /// FIXME: This should ext-warn on overflow during evaluation! ISO C does not |
Chris Lattner | ccc213f | 2007-09-26 00:47:26 +0000 | [diff] [blame] | 740 | /// permit this. This includes things like (int)1e1000 |
Chris Lattner | ce0afc0 | 2007-07-18 05:21:20 +0000 | [diff] [blame] | 741 | /// |
| 742 | /// FIXME: Handle offsetof. Two things to do: Handle GCC's __builtin_offsetof |
| 743 | /// to support gcc 4.0+ and handle the idiom GCC recognizes with a null pointer |
| 744 | /// cast+dereference. |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 745 | bool Expr::isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, |
| 746 | SourceLocation *Loc, bool isEvaluated) const { |
Eli Friedman | a6afa76 | 2008-11-13 06:09:17 +0000 | [diff] [blame] | 747 | // Pretest for integral type; some parts of the code crash for types that |
| 748 | // can't be sized. |
| 749 | if (!getType()->isIntegralType()) { |
| 750 | if (Loc) *Loc = getLocStart(); |
| 751 | return false; |
| 752 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 753 | switch (getStmtClass()) { |
| 754 | default: |
| 755 | if (Loc) *Loc = getLocStart(); |
| 756 | return false; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 757 | case ParenExprClass: |
| 758 | return cast<ParenExpr>(this)->getSubExpr()-> |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 759 | isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 760 | case IntegerLiteralClass: |
| 761 | Result = cast<IntegerLiteral>(this)->getValue(); |
| 762 | break; |
Chris Lattner | 2eadfb6 | 2007-07-15 23:32:58 +0000 | [diff] [blame] | 763 | case CharacterLiteralClass: { |
| 764 | const CharacterLiteral *CL = cast<CharacterLiteral>(this); |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 765 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Chris Lattner | 2eadfb6 | 2007-07-15 23:32:58 +0000 | [diff] [blame] | 766 | Result = CL->getValue(); |
Chris Lattner | f0fbcb3 | 2007-07-16 21:04:56 +0000 | [diff] [blame] | 767 | Result.setIsUnsigned(!getType()->isSignedIntegerType()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 768 | break; |
Chris Lattner | 2eadfb6 | 2007-07-15 23:32:58 +0000 | [diff] [blame] | 769 | } |
Anders Carlsson | b88d45e | 2008-08-23 21:12:35 +0000 | [diff] [blame] | 770 | case CXXBoolLiteralExprClass: { |
| 771 | const CXXBoolLiteralExpr *BL = cast<CXXBoolLiteralExpr>(this); |
| 772 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
| 773 | Result = BL->getValue(); |
| 774 | Result.setIsUnsigned(!getType()->isSignedIntegerType()); |
| 775 | break; |
| 776 | } |
Argyrios Kyrtzidis | 7267f78 | 2008-08-23 19:35:47 +0000 | [diff] [blame] | 777 | case CXXZeroInitValueExprClass: |
| 778 | Result.clear(); |
| 779 | break; |
Steve Naroff | 7b658aa | 2007-08-02 04:09:23 +0000 | [diff] [blame] | 780 | case TypesCompatibleExprClass: { |
| 781 | const TypesCompatibleExpr *TCE = cast<TypesCompatibleExpr>(this); |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 782 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Daniel Dunbar | ac620de | 2008-10-24 08:07:57 +0000 | [diff] [blame] | 783 | // Per gcc docs "this built-in function ignores top level |
| 784 | // qualifiers". We need to use the canonical version to properly |
| 785 | // be able to strip CRV qualifiers from the type. |
| 786 | QualType T0 = Ctx.getCanonicalType(TCE->getArgType1()); |
| 787 | QualType T1 = Ctx.getCanonicalType(TCE->getArgType2()); |
| 788 | Result = Ctx.typesAreCompatible(T0.getUnqualifiedType(), |
| 789 | T1.getUnqualifiedType()); |
Steve Naroff | 389cecc | 2007-08-02 00:13:27 +0000 | [diff] [blame] | 790 | break; |
Steve Naroff | 7b658aa | 2007-08-02 04:09:23 +0000 | [diff] [blame] | 791 | } |
Douglas Gregor | b460980 | 2008-11-14 16:09:21 +0000 | [diff] [blame^] | 792 | case CallExprClass: |
| 793 | case CXXOperatorCallExprClass: { |
Steve Naroff | 13b7c5f | 2007-08-08 22:15:55 +0000 | [diff] [blame] | 794 | const CallExpr *CE = cast<CallExpr>(this); |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 795 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Chris Lattner | a4d55d8 | 2008-10-06 06:40:35 +0000 | [diff] [blame] | 796 | |
| 797 | // If this is a call to a builtin function, constant fold it otherwise |
| 798 | // reject it. |
| 799 | if (CE->isBuiltinCall()) { |
| 800 | APValue ResultAP; |
| 801 | if (CE->tryEvaluate(ResultAP, Ctx)) { |
| 802 | Result = ResultAP.getInt(); |
| 803 | break; // It is a constant, expand it. |
| 804 | } |
| 805 | } |
| 806 | |
Steve Naroff | 13b7c5f | 2007-08-08 22:15:55 +0000 | [diff] [blame] | 807 | if (Loc) *Loc = getLocStart(); |
| 808 | return false; |
| 809 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 810 | case DeclRefExprClass: |
| 811 | if (const EnumConstantDecl *D = |
| 812 | dyn_cast<EnumConstantDecl>(cast<DeclRefExpr>(this)->getDecl())) { |
| 813 | Result = D->getInitVal(); |
| 814 | break; |
| 815 | } |
| 816 | if (Loc) *Loc = getLocStart(); |
| 817 | return false; |
| 818 | case UnaryOperatorClass: { |
| 819 | const UnaryOperator *Exp = cast<UnaryOperator>(this); |
| 820 | |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 821 | // Get the operand value. If this is offsetof, do not evalute the |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 822 | // operand. This affects C99 6.6p3. |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 823 | if (!Exp->isOffsetOfOp() && !Exp->getSubExpr()-> |
| 824 | isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 825 | return false; |
| 826 | |
| 827 | switch (Exp->getOpcode()) { |
| 828 | // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. |
| 829 | // See C99 6.6p3. |
| 830 | default: |
| 831 | if (Loc) *Loc = Exp->getOperatorLoc(); |
| 832 | return false; |
| 833 | case UnaryOperator::Extension: |
Chris Lattner | 76e773a | 2007-07-18 18:38:36 +0000 | [diff] [blame] | 834 | return true; // FIXME: this is wrong. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 835 | case UnaryOperator::LNot: { |
Chris Lattner | bf75538 | 2008-01-25 19:16:19 +0000 | [diff] [blame] | 836 | bool Val = Result == 0; |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 837 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 838 | Result = Val; |
| 839 | break; |
| 840 | } |
| 841 | case UnaryOperator::Plus: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 842 | break; |
| 843 | case UnaryOperator::Minus: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 844 | Result = -Result; |
| 845 | break; |
| 846 | case UnaryOperator::Not: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 847 | Result = ~Result; |
| 848 | break; |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 849 | case UnaryOperator::OffsetOf: |
Daniel Dunbar | aa1f9f1 | 2008-08-28 18:42:20 +0000 | [diff] [blame] | 850 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 851 | Result = Exp->evaluateOffsetOf(Ctx); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 852 | } |
| 853 | break; |
| 854 | } |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 855 | case SizeOfAlignOfExprClass: { |
| 856 | const SizeOfAlignOfExpr *Exp = cast<SizeOfAlignOfExpr>(this); |
Chris Lattner | a269ebf | 2008-02-21 05:45:29 +0000 | [diff] [blame] | 857 | |
| 858 | // Return the result in the right width. |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 859 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Chris Lattner | a269ebf | 2008-02-21 05:45:29 +0000 | [diff] [blame] | 860 | |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 861 | QualType ArgTy = Exp->getTypeOfArgument(); |
Chris Lattner | a269ebf | 2008-02-21 05:45:29 +0000 | [diff] [blame] | 862 | // sizeof(void) and __alignof__(void) = 1 as a gcc extension. |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 863 | if (ArgTy->isVoidType()) { |
Chris Lattner | a269ebf | 2008-02-21 05:45:29 +0000 | [diff] [blame] | 864 | Result = 1; |
| 865 | break; |
| 866 | } |
| 867 | |
| 868 | // alignof always evaluates to a constant, sizeof does if arg is not VLA. |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 869 | if (Exp->isSizeOf() && !ArgTy->isConstantSizeType()) { |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 870 | if (Loc) *Loc = Exp->getOperatorLoc(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 871 | return false; |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 872 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 873 | |
Chris Lattner | 76e773a | 2007-07-18 18:38:36 +0000 | [diff] [blame] | 874 | // Get information about the size or align. |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 875 | if (ArgTy->isFunctionType()) { |
Chris Lattner | efdd157 | 2008-01-02 21:54:09 +0000 | [diff] [blame] | 876 | // GCC extension: sizeof(function) = 1. |
| 877 | Result = Exp->isSizeOf() ? 1 : 4; |
Anders Carlsson | 6a24acb | 2008-02-16 01:20:23 +0000 | [diff] [blame] | 878 | } else { |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 879 | unsigned CharSize = Ctx.Target.getCharWidth(); |
Anders Carlsson | 6a24acb | 2008-02-16 01:20:23 +0000 | [diff] [blame] | 880 | if (Exp->isSizeOf()) |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 881 | Result = Ctx.getTypeSize(ArgTy) / CharSize; |
Anders Carlsson | 6a24acb | 2008-02-16 01:20:23 +0000 | [diff] [blame] | 882 | else |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 883 | Result = Ctx.getTypeAlign(ArgTy) / CharSize; |
Ted Kremenek | 060e470 | 2007-12-17 17:38:43 +0000 | [diff] [blame] | 884 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 885 | break; |
| 886 | } |
| 887 | case BinaryOperatorClass: { |
| 888 | const BinaryOperator *Exp = cast<BinaryOperator>(this); |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 889 | llvm::APSInt LHS, RHS; |
| 890 | |
| 891 | // Initialize result to have correct signedness and width. |
| 892 | Result = llvm::APSInt(static_cast<uint32_t>(Ctx.getTypeSize(getType())), |
Eli Friedman | b11e778 | 2008-11-13 02:13:11 +0000 | [diff] [blame] | 893 | !getType()->isSignedIntegerType()); |
| 894 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 895 | // The LHS of a constant expr is always evaluated and needed. |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 896 | if (!Exp->getLHS()->isIntegerConstantExpr(LHS, Ctx, Loc, isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 897 | return false; |
| 898 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 899 | // The short-circuiting &&/|| operators don't necessarily evaluate their |
| 900 | // RHS. Make sure to pass isEvaluated down correctly. |
| 901 | if (Exp->isLogicalOp()) { |
| 902 | bool RHSEval; |
| 903 | if (Exp->getOpcode() == BinaryOperator::LAnd) |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 904 | RHSEval = LHS != 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 905 | else { |
| 906 | assert(Exp->getOpcode() == BinaryOperator::LOr &&"Unexpected logical"); |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 907 | RHSEval = LHS == 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 908 | } |
| 909 | |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 910 | if (!Exp->getRHS()->isIntegerConstantExpr(RHS, Ctx, Loc, |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 911 | isEvaluated & RHSEval)) |
| 912 | return false; |
| 913 | } else { |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 914 | if (!Exp->getRHS()->isIntegerConstantExpr(RHS, Ctx, Loc, isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 915 | return false; |
| 916 | } |
| 917 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 918 | switch (Exp->getOpcode()) { |
| 919 | default: |
| 920 | if (Loc) *Loc = getLocStart(); |
| 921 | return false; |
| 922 | case BinaryOperator::Mul: |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 923 | Result = LHS * RHS; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 924 | break; |
| 925 | case BinaryOperator::Div: |
| 926 | if (RHS == 0) { |
| 927 | if (!isEvaluated) break; |
| 928 | if (Loc) *Loc = getLocStart(); |
| 929 | return false; |
| 930 | } |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 931 | Result = LHS / RHS; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 932 | break; |
| 933 | case BinaryOperator::Rem: |
| 934 | if (RHS == 0) { |
| 935 | if (!isEvaluated) break; |
| 936 | if (Loc) *Loc = getLocStart(); |
| 937 | return false; |
| 938 | } |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 939 | Result = LHS % RHS; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 940 | break; |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 941 | case BinaryOperator::Add: Result = LHS + RHS; break; |
| 942 | case BinaryOperator::Sub: Result = LHS - RHS; break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 943 | case BinaryOperator::Shl: |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 944 | Result = LHS << |
| 945 | static_cast<uint32_t>(RHS.getLimitedValue(LHS.getBitWidth()-1)); |
| 946 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 947 | case BinaryOperator::Shr: |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 948 | Result = LHS >> |
| 949 | static_cast<uint32_t>(RHS.getLimitedValue(LHS.getBitWidth()-1)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 950 | break; |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 951 | case BinaryOperator::LT: Result = LHS < RHS; break; |
| 952 | case BinaryOperator::GT: Result = LHS > RHS; break; |
| 953 | case BinaryOperator::LE: Result = LHS <= RHS; break; |
| 954 | case BinaryOperator::GE: Result = LHS >= RHS; break; |
| 955 | case BinaryOperator::EQ: Result = LHS == RHS; break; |
| 956 | case BinaryOperator::NE: Result = LHS != RHS; break; |
| 957 | case BinaryOperator::And: Result = LHS & RHS; break; |
| 958 | case BinaryOperator::Xor: Result = LHS ^ RHS; break; |
| 959 | case BinaryOperator::Or: Result = LHS | RHS; break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 960 | case BinaryOperator::LAnd: |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 961 | Result = LHS != 0 && RHS != 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 962 | break; |
| 963 | case BinaryOperator::LOr: |
Daniel Dunbar | e1226d2 | 2008-09-22 23:53:24 +0000 | [diff] [blame] | 964 | Result = LHS != 0 || RHS != 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 965 | break; |
Eli Friedman | b11e778 | 2008-11-13 02:13:11 +0000 | [diff] [blame] | 966 | |
| 967 | case BinaryOperator::Comma: |
| 968 | // C99 6.6p3: "shall not contain assignment, ..., or comma operators, |
| 969 | // *except* when they are contained within a subexpression that is not |
| 970 | // evaluated". Note that Assignment can never happen due to constraints |
| 971 | // on the LHS subexpr, so we don't need to check it here. |
| 972 | if (isEvaluated) { |
| 973 | if (Loc) *Loc = getLocStart(); |
| 974 | return false; |
| 975 | } |
| 976 | |
| 977 | // The result of the constant expr is the RHS. |
| 978 | Result = RHS; |
| 979 | return true; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 980 | } |
| 981 | |
| 982 | assert(!Exp->isAssignmentOp() && "LHS can't be a constant expr!"); |
| 983 | break; |
| 984 | } |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 985 | case ImplicitCastExprClass: |
Douglas Gregor | 6eec8e8 | 2008-10-28 15:36:24 +0000 | [diff] [blame] | 986 | case CStyleCastExprClass: |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 987 | case CXXFunctionalCastExprClass: { |
Argyrios Kyrtzidis | 0835a3c | 2008-08-18 23:01:59 +0000 | [diff] [blame] | 988 | const Expr *SubExpr = cast<CastExpr>(this)->getSubExpr(); |
| 989 | SourceLocation CastLoc = getLocStart(); |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 990 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 991 | // C99 6.6p6: shall only convert arithmetic types to integer types. |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 992 | if (!SubExpr->getType()->isArithmeticType() || |
| 993 | !getType()->isIntegerType()) { |
| 994 | if (Loc) *Loc = SubExpr->getLocStart(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 995 | return false; |
| 996 | } |
Chris Lattner | 987b15d | 2007-09-22 19:04:13 +0000 | [diff] [blame] | 997 | |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 998 | uint32_t DestWidth = static_cast<uint32_t>(Ctx.getTypeSize(getType())); |
Chris Lattner | 987b15d | 2007-09-22 19:04:13 +0000 | [diff] [blame] | 999 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1000 | // Handle simple integer->integer casts. |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 1001 | if (SubExpr->getType()->isIntegerType()) { |
| 1002 | if (!SubExpr->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1003 | return false; |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 1004 | |
| 1005 | // Figure out if this is a truncate, extend or noop cast. |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 1006 | // If the input is signed, do a sign extend, noop, or truncate. |
Chris Lattner | c0a356b | 2008-01-09 18:59:34 +0000 | [diff] [blame] | 1007 | if (getType()->isBooleanType()) { |
| 1008 | // Conversion to bool compares against zero. |
| 1009 | Result = Result != 0; |
| 1010 | Result.zextOrTrunc(DestWidth); |
| 1011 | } else if (SubExpr->getType()->isSignedIntegerType()) |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 1012 | Result.sextOrTrunc(DestWidth); |
| 1013 | else // If the input is unsigned, do a zero extend, noop, or truncate. |
| 1014 | Result.zextOrTrunc(DestWidth); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1015 | break; |
| 1016 | } |
| 1017 | |
| 1018 | // Allow floating constants that are the immediate operands of casts or that |
| 1019 | // are parenthesized. |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 1020 | const Expr *Operand = SubExpr; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1021 | while (const ParenExpr *PE = dyn_cast<ParenExpr>(Operand)) |
| 1022 | Operand = PE->getSubExpr(); |
Chris Lattner | 987b15d | 2007-09-22 19:04:13 +0000 | [diff] [blame] | 1023 | |
| 1024 | // If this isn't a floating literal, we can't handle it. |
| 1025 | const FloatingLiteral *FL = dyn_cast<FloatingLiteral>(Operand); |
| 1026 | if (!FL) { |
| 1027 | if (Loc) *Loc = Operand->getLocStart(); |
| 1028 | return false; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1029 | } |
Chris Lattner | c0a356b | 2008-01-09 18:59:34 +0000 | [diff] [blame] | 1030 | |
| 1031 | // If the destination is boolean, compare against zero. |
| 1032 | if (getType()->isBooleanType()) { |
| 1033 | Result = !FL->getValue().isZero(); |
| 1034 | Result.zextOrTrunc(DestWidth); |
| 1035 | break; |
| 1036 | } |
Chris Lattner | 987b15d | 2007-09-22 19:04:13 +0000 | [diff] [blame] | 1037 | |
| 1038 | // Determine whether we are converting to unsigned or signed. |
| 1039 | bool DestSigned = getType()->isSignedIntegerType(); |
Chris Lattner | ccc213f | 2007-09-26 00:47:26 +0000 | [diff] [blame] | 1040 | |
| 1041 | // TODO: Warn on overflow, but probably not here: isIntegerConstantExpr can |
| 1042 | // be called multiple times per AST. |
Dale Johannesen | ee5a700 | 2008-10-09 23:02:32 +0000 | [diff] [blame] | 1043 | uint64_t Space[4]; |
| 1044 | bool ignored; |
Chris Lattner | ccc213f | 2007-09-26 00:47:26 +0000 | [diff] [blame] | 1045 | (void)FL->getValue().convertToInteger(Space, DestWidth, DestSigned, |
Dale Johannesen | ee5a700 | 2008-10-09 23:02:32 +0000 | [diff] [blame] | 1046 | llvm::APFloat::rmTowardZero, |
| 1047 | &ignored); |
Chris Lattner | 987b15d | 2007-09-22 19:04:13 +0000 | [diff] [blame] | 1048 | Result = llvm::APInt(DestWidth, 4, Space); |
| 1049 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1050 | } |
| 1051 | case ConditionalOperatorClass: { |
| 1052 | const ConditionalOperator *Exp = cast<ConditionalOperator>(this); |
| 1053 | |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 1054 | if (!Exp->getCond()->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1055 | return false; |
| 1056 | |
| 1057 | const Expr *TrueExp = Exp->getLHS(); |
| 1058 | const Expr *FalseExp = Exp->getRHS(); |
| 1059 | if (Result == 0) std::swap(TrueExp, FalseExp); |
| 1060 | |
| 1061 | // Evaluate the false one first, discard the result. |
Anders Carlsson | 3907323 | 2007-11-30 19:04:31 +0000 | [diff] [blame] | 1062 | if (FalseExp && !FalseExp->isIntegerConstantExpr(Result, Ctx, Loc, false)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1063 | return false; |
| 1064 | // Evalute the true one, capture the result. |
Anders Carlsson | 3907323 | 2007-11-30 19:04:31 +0000 | [diff] [blame] | 1065 | if (TrueExp && |
| 1066 | !TrueExp->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1067 | return false; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1068 | break; |
| 1069 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1070 | case CXXDefaultArgExprClass: |
| 1071 | return cast<CXXDefaultArgExpr>(this) |
| 1072 | ->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1073 | } |
| 1074 | |
| 1075 | // Cases that are valid constant exprs fall through to here. |
| 1076 | Result.setIsUnsigned(getType()->isUnsignedIntegerType()); |
| 1077 | return true; |
| 1078 | } |
| 1079 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1080 | /// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an |
| 1081 | /// integer constant expression with the value zero, or if this is one that is |
| 1082 | /// cast to void*. |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 1083 | bool Expr::isNullPointerConstant(ASTContext &Ctx) const { |
Sebastian Redl | 0777972 | 2008-10-31 14:43:28 +0000 | [diff] [blame] | 1084 | // Strip off a cast to void*, if it exists. Except in C++. |
Argyrios Kyrtzidis | 0835a3c | 2008-08-18 23:01:59 +0000 | [diff] [blame] | 1085 | if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) { |
Sebastian Redl | 6215dee | 2008-11-04 11:45:54 +0000 | [diff] [blame] | 1086 | if (!Ctx.getLangOptions().CPlusPlus) { |
Sebastian Redl | 0777972 | 2008-10-31 14:43:28 +0000 | [diff] [blame] | 1087 | // Check that it is a cast to void*. |
| 1088 | if (const PointerType *PT = CE->getType()->getAsPointerType()) { |
| 1089 | QualType Pointee = PT->getPointeeType(); |
| 1090 | if (Pointee.getCVRQualifiers() == 0 && |
| 1091 | Pointee->isVoidType() && // to void* |
| 1092 | CE->getSubExpr()->getType()->isIntegerType()) // from int. |
| 1093 | return CE->getSubExpr()->isNullPointerConstant(Ctx); |
| 1094 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1095 | } |
Steve Naroff | aa58f00 | 2008-01-14 16:10:57 +0000 | [diff] [blame] | 1096 | } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) { |
| 1097 | // Ignore the ImplicitCastExpr type entirely. |
| 1098 | return ICE->getSubExpr()->isNullPointerConstant(Ctx); |
| 1099 | } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) { |
| 1100 | // Accept ((void*)0) as a null pointer constant, as many other |
| 1101 | // implementations do. |
| 1102 | return PE->getSubExpr()->isNullPointerConstant(Ctx); |
Chris Lattner | 8123a95 | 2008-04-10 02:22:51 +0000 | [diff] [blame] | 1103 | } else if (const CXXDefaultArgExpr *DefaultArg |
| 1104 | = dyn_cast<CXXDefaultArgExpr>(this)) { |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1105 | // See through default argument expressions |
| 1106 | return DefaultArg->getExpr()->isNullPointerConstant(Ctx); |
Steve Naroff | aaffbf7 | 2008-01-14 02:53:34 +0000 | [diff] [blame] | 1107 | } |
Steve Naroff | aa58f00 | 2008-01-14 16:10:57 +0000 | [diff] [blame] | 1108 | |
| 1109 | // This expression must be an integer type. |
| 1110 | if (!getType()->isIntegerType()) |
| 1111 | return false; |
| 1112 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1113 | // If we have an integer constant expression, we need to *evaluate* it and |
| 1114 | // test for the value 0. |
| 1115 | llvm::APSInt Val(32); |
Steve Naroff | aa58f00 | 2008-01-14 16:10:57 +0000 | [diff] [blame] | 1116 | return isIntegerConstantExpr(Val, Ctx, 0, true) && Val == 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1117 | } |
Steve Naroff | 31a4584 | 2007-07-28 23:10:27 +0000 | [diff] [blame] | 1118 | |
Douglas Gregor | 27c8dc0 | 2008-10-29 00:13:59 +0000 | [diff] [blame] | 1119 | /// isBitField - Return true if this expression is a bit-field. |
| 1120 | bool Expr::isBitField() { |
| 1121 | Expr *E = this->IgnoreParenCasts(); |
| 1122 | if (MemberExpr *MemRef = dyn_cast<MemberExpr>(E)) |
| 1123 | return MemRef->getMemberDecl()->isBitField(); |
| 1124 | return false; |
| 1125 | } |
| 1126 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 1127 | unsigned ExtVectorElementExpr::getNumElements() const { |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1128 | if (const VectorType *VT = getType()->getAsVectorType()) |
| 1129 | return VT->getNumElements(); |
| 1130 | return 1; |
Chris Lattner | 4d0ac88 | 2007-08-03 16:00:20 +0000 | [diff] [blame] | 1131 | } |
| 1132 | |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1133 | /// containsDuplicateElements - Return true if any element access is repeated. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 1134 | bool ExtVectorElementExpr::containsDuplicateElements() const { |
Steve Naroff | fec0b49 | 2007-07-30 03:29:09 +0000 | [diff] [blame] | 1135 | const char *compStr = Accessor.getName(); |
| 1136 | unsigned length = strlen(compStr); |
| 1137 | |
| 1138 | for (unsigned i = 0; i < length-1; i++) { |
| 1139 | const char *s = compStr+i; |
| 1140 | for (const char c = *s++; *s; s++) |
| 1141 | if (c == *s) |
| 1142 | return true; |
| 1143 | } |
| 1144 | return false; |
| 1145 | } |
Chris Lattner | b8f849d | 2007-08-02 23:36:59 +0000 | [diff] [blame] | 1146 | |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1147 | /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray. |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1148 | void ExtVectorElementExpr::getEncodedElementAccess( |
| 1149 | llvm::SmallVectorImpl<unsigned> &Elts) const { |
Chris Lattner | b8f849d | 2007-08-02 23:36:59 +0000 | [diff] [blame] | 1150 | const char *compStr = Accessor.getName(); |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1151 | |
| 1152 | bool isHi = !strcmp(compStr, "hi"); |
| 1153 | bool isLo = !strcmp(compStr, "lo"); |
| 1154 | bool isEven = !strcmp(compStr, "e"); |
| 1155 | bool isOdd = !strcmp(compStr, "o"); |
| 1156 | |
| 1157 | for (unsigned i = 0, e = getNumElements(); i != e; ++i) { |
| 1158 | uint64_t Index; |
| 1159 | |
| 1160 | if (isHi) |
| 1161 | Index = e + i; |
| 1162 | else if (isLo) |
| 1163 | Index = i; |
| 1164 | else if (isEven) |
| 1165 | Index = 2 * i; |
| 1166 | else if (isOdd) |
| 1167 | Index = 2 * i + 1; |
| 1168 | else |
| 1169 | Index = ExtVectorType::getAccessorIdx(compStr[i]); |
Chris Lattner | b8f849d | 2007-08-02 23:36:59 +0000 | [diff] [blame] | 1170 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1171 | Elts.push_back(Index); |
Chris Lattner | b8f849d | 2007-08-02 23:36:59 +0000 | [diff] [blame] | 1172 | } |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1173 | } |
| 1174 | |
Steve Naroff | 68d331a | 2007-09-27 14:38:14 +0000 | [diff] [blame] | 1175 | // constructor for instance messages. |
Steve Naroff | bcfb06a | 2007-09-28 22:22:11 +0000 | [diff] [blame] | 1176 | ObjCMessageExpr::ObjCMessageExpr(Expr *receiver, Selector selInfo, |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 1177 | QualType retType, ObjCMethodDecl *mproto, |
Steve Naroff | db611d5 | 2007-11-03 16:37:59 +0000 | [diff] [blame] | 1178 | SourceLocation LBrac, SourceLocation RBrac, |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1179 | Expr **ArgExprs, unsigned nargs) |
Steve Naroff | db611d5 | 2007-11-03 16:37:59 +0000 | [diff] [blame] | 1180 | : Expr(ObjCMessageExprClass, retType), SelName(selInfo), |
Ted Kremenek | ea958e57 | 2008-05-01 17:26:20 +0000 | [diff] [blame] | 1181 | MethodProto(mproto) { |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1182 | NumArgs = nargs; |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1183 | SubExprs = new Stmt*[NumArgs+1]; |
Steve Naroff | 68d331a | 2007-09-27 14:38:14 +0000 | [diff] [blame] | 1184 | SubExprs[RECEIVER] = receiver; |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1185 | if (NumArgs) { |
| 1186 | for (unsigned i = 0; i != NumArgs; ++i) |
Steve Naroff | 68d331a | 2007-09-27 14:38:14 +0000 | [diff] [blame] | 1187 | SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); |
| 1188 | } |
Steve Naroff | 563477d | 2007-09-18 23:55:05 +0000 | [diff] [blame] | 1189 | LBracloc = LBrac; |
| 1190 | RBracloc = RBrac; |
| 1191 | } |
| 1192 | |
Steve Naroff | 68d331a | 2007-09-27 14:38:14 +0000 | [diff] [blame] | 1193 | // constructor for class messages. |
| 1194 | // FIXME: clsName should be typed to ObjCInterfaceType |
Steve Naroff | bcfb06a | 2007-09-28 22:22:11 +0000 | [diff] [blame] | 1195 | ObjCMessageExpr::ObjCMessageExpr(IdentifierInfo *clsName, Selector selInfo, |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 1196 | QualType retType, ObjCMethodDecl *mproto, |
Steve Naroff | db611d5 | 2007-11-03 16:37:59 +0000 | [diff] [blame] | 1197 | SourceLocation LBrac, SourceLocation RBrac, |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1198 | Expr **ArgExprs, unsigned nargs) |
Steve Naroff | db611d5 | 2007-11-03 16:37:59 +0000 | [diff] [blame] | 1199 | : Expr(ObjCMessageExprClass, retType), SelName(selInfo), |
Ted Kremenek | ea958e57 | 2008-05-01 17:26:20 +0000 | [diff] [blame] | 1200 | MethodProto(mproto) { |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1201 | NumArgs = nargs; |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1202 | SubExprs = new Stmt*[NumArgs+1]; |
Ted Kremenek | 4df728e | 2008-06-24 15:50:53 +0000 | [diff] [blame] | 1203 | SubExprs[RECEIVER] = (Expr*) ((uintptr_t) clsName | IsClsMethDeclUnknown); |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1204 | if (NumArgs) { |
| 1205 | for (unsigned i = 0; i != NumArgs; ++i) |
Steve Naroff | 68d331a | 2007-09-27 14:38:14 +0000 | [diff] [blame] | 1206 | SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); |
| 1207 | } |
Steve Naroff | 563477d | 2007-09-18 23:55:05 +0000 | [diff] [blame] | 1208 | LBracloc = LBrac; |
| 1209 | RBracloc = RBrac; |
| 1210 | } |
| 1211 | |
Ted Kremenek | 4df728e | 2008-06-24 15:50:53 +0000 | [diff] [blame] | 1212 | // constructor for class messages. |
| 1213 | ObjCMessageExpr::ObjCMessageExpr(ObjCInterfaceDecl *cls, Selector selInfo, |
| 1214 | QualType retType, ObjCMethodDecl *mproto, |
| 1215 | SourceLocation LBrac, SourceLocation RBrac, |
| 1216 | Expr **ArgExprs, unsigned nargs) |
| 1217 | : Expr(ObjCMessageExprClass, retType), SelName(selInfo), |
| 1218 | MethodProto(mproto) { |
| 1219 | NumArgs = nargs; |
| 1220 | SubExprs = new Stmt*[NumArgs+1]; |
| 1221 | SubExprs[RECEIVER] = (Expr*) ((uintptr_t) cls | IsClsMethDeclKnown); |
| 1222 | if (NumArgs) { |
| 1223 | for (unsigned i = 0; i != NumArgs; ++i) |
| 1224 | SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); |
| 1225 | } |
| 1226 | LBracloc = LBrac; |
| 1227 | RBracloc = RBrac; |
| 1228 | } |
| 1229 | |
| 1230 | ObjCMessageExpr::ClassInfo ObjCMessageExpr::getClassInfo() const { |
| 1231 | uintptr_t x = (uintptr_t) SubExprs[RECEIVER]; |
| 1232 | switch (x & Flags) { |
| 1233 | default: |
| 1234 | assert(false && "Invalid ObjCMessageExpr."); |
| 1235 | case IsInstMeth: |
| 1236 | return ClassInfo(0, 0); |
| 1237 | case IsClsMethDeclUnknown: |
| 1238 | return ClassInfo(0, (IdentifierInfo*) (x & ~Flags)); |
| 1239 | case IsClsMethDeclKnown: { |
| 1240 | ObjCInterfaceDecl* D = (ObjCInterfaceDecl*) (x & ~Flags); |
| 1241 | return ClassInfo(D, D->getIdentifier()); |
| 1242 | } |
| 1243 | } |
| 1244 | } |
| 1245 | |
Chris Lattner | 27437ca | 2007-10-25 00:29:32 +0000 | [diff] [blame] | 1246 | bool ChooseExpr::isConditionTrue(ASTContext &C) const { |
Daniel Dunbar | 32442bb | 2008-08-13 23:47:13 +0000 | [diff] [blame] | 1247 | return getCond()->getIntegerConstantExprValue(C) != 0; |
Chris Lattner | 27437ca | 2007-10-25 00:29:32 +0000 | [diff] [blame] | 1248 | } |
| 1249 | |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 1250 | static int64_t evaluateOffsetOf(ASTContext& C, const Expr *E) |
| 1251 | { |
| 1252 | if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { |
| 1253 | QualType Ty = ME->getBase()->getType(); |
| 1254 | |
| 1255 | RecordDecl *RD = Ty->getAsRecordType()->getDecl(); |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 1256 | const ASTRecordLayout &RL = C.getASTRecordLayout(RD); |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 1257 | FieldDecl *FD = ME->getMemberDecl(); |
| 1258 | |
| 1259 | // FIXME: This is linear time. |
| 1260 | unsigned i = 0, e = 0; |
| 1261 | for (i = 0, e = RD->getNumMembers(); i != e; i++) { |
| 1262 | if (RD->getMember(i) == FD) |
| 1263 | break; |
| 1264 | } |
| 1265 | |
| 1266 | return RL.getFieldOffset(i) + evaluateOffsetOf(C, ME->getBase()); |
| 1267 | } else if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) { |
| 1268 | const Expr *Base = ASE->getBase(); |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 1269 | |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 1270 | int64_t size = C.getTypeSize(ASE->getType()); |
Daniel Dunbar | 32442bb | 2008-08-13 23:47:13 +0000 | [diff] [blame] | 1271 | size *= ASE->getIdx()->getIntegerConstantExprValue(C).getSExtValue(); |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 1272 | |
| 1273 | return size + evaluateOffsetOf(C, Base); |
| 1274 | } else if (isa<CompoundLiteralExpr>(E)) |
| 1275 | return 0; |
| 1276 | |
| 1277 | assert(0 && "Unknown offsetof subexpression!"); |
| 1278 | return 0; |
| 1279 | } |
| 1280 | |
| 1281 | int64_t UnaryOperator::evaluateOffsetOf(ASTContext& C) const |
| 1282 | { |
| 1283 | assert(Opc == OffsetOf && "Unary operator not offsetof!"); |
| 1284 | |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 1285 | unsigned CharSize = C.Target.getCharWidth(); |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1286 | return ::evaluateOffsetOf(C, cast<Expr>(Val)) / CharSize; |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 1287 | } |
| 1288 | |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 1289 | void SizeOfAlignOfExpr::Destroy(ASTContext& C) { |
| 1290 | // Override default behavior of traversing children. If this has a type |
| 1291 | // operand and the type is a variable-length array, the child iteration |
| 1292 | // will iterate over the size expression. However, this expression belongs |
| 1293 | // to the type, not to this, so we don't want to delete it. |
| 1294 | // We still want to delete this expression. |
| 1295 | // FIXME: Same as in Stmt::Destroy - will be eventually in ASTContext's |
| 1296 | // pool allocator. |
| 1297 | if (isArgumentType()) |
| 1298 | delete this; |
| 1299 | else |
| 1300 | Expr::Destroy(C); |
Daniel Dunbar | 9048891 | 2008-08-28 18:02:04 +0000 | [diff] [blame] | 1301 | } |
| 1302 | |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1303 | //===----------------------------------------------------------------------===// |
Ted Kremenek | ce2fc3a | 2008-10-27 18:40:21 +0000 | [diff] [blame] | 1304 | // ExprIterator. |
| 1305 | //===----------------------------------------------------------------------===// |
| 1306 | |
| 1307 | Expr* ExprIterator::operator[](size_t idx) { return cast<Expr>(I[idx]); } |
| 1308 | Expr* ExprIterator::operator*() const { return cast<Expr>(*I); } |
| 1309 | Expr* ExprIterator::operator->() const { return cast<Expr>(*I); } |
| 1310 | const Expr* ConstExprIterator::operator[](size_t idx) const { |
| 1311 | return cast<Expr>(I[idx]); |
| 1312 | } |
| 1313 | const Expr* ConstExprIterator::operator*() const { return cast<Expr>(*I); } |
| 1314 | const Expr* ConstExprIterator::operator->() const { return cast<Expr>(*I); } |
| 1315 | |
| 1316 | //===----------------------------------------------------------------------===// |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1317 | // Child Iterators for iterating over subexpressions/substatements |
| 1318 | //===----------------------------------------------------------------------===// |
| 1319 | |
| 1320 | // DeclRefExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1321 | Stmt::child_iterator DeclRefExpr::child_begin() { return child_iterator(); } |
| 1322 | Stmt::child_iterator DeclRefExpr::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1323 | |
Steve Naroff | 7779db4 | 2007-11-12 14:29:37 +0000 | [diff] [blame] | 1324 | // ObjCIvarRefExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1325 | Stmt::child_iterator ObjCIvarRefExpr::child_begin() { return &Base; } |
| 1326 | Stmt::child_iterator ObjCIvarRefExpr::child_end() { return &Base+1; } |
Steve Naroff | 7779db4 | 2007-11-12 14:29:37 +0000 | [diff] [blame] | 1327 | |
Steve Naroff | e3e9add | 2008-06-02 23:03:37 +0000 | [diff] [blame] | 1328 | // ObjCPropertyRefExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1329 | Stmt::child_iterator ObjCPropertyRefExpr::child_begin() { return &Base; } |
| 1330 | Stmt::child_iterator ObjCPropertyRefExpr::child_end() { return &Base+1; } |
Steve Naroff | ae78407 | 2008-05-30 00:40:33 +0000 | [diff] [blame] | 1331 | |
Douglas Gregor | cd9b46e | 2008-11-04 14:56:14 +0000 | [diff] [blame] | 1332 | // ObjCSuperExpr |
| 1333 | Stmt::child_iterator ObjCSuperExpr::child_begin() { return child_iterator(); } |
| 1334 | Stmt::child_iterator ObjCSuperExpr::child_end() { return child_iterator(); } |
| 1335 | |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 1336 | // PredefinedExpr |
| 1337 | Stmt::child_iterator PredefinedExpr::child_begin() { return child_iterator(); } |
| 1338 | Stmt::child_iterator PredefinedExpr::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1339 | |
| 1340 | // IntegerLiteral |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1341 | Stmt::child_iterator IntegerLiteral::child_begin() { return child_iterator(); } |
| 1342 | Stmt::child_iterator IntegerLiteral::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1343 | |
| 1344 | // CharacterLiteral |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1345 | Stmt::child_iterator CharacterLiteral::child_begin() { return child_iterator(); } |
| 1346 | Stmt::child_iterator CharacterLiteral::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1347 | |
| 1348 | // FloatingLiteral |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1349 | Stmt::child_iterator FloatingLiteral::child_begin() { return child_iterator(); } |
| 1350 | Stmt::child_iterator FloatingLiteral::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1351 | |
Chris Lattner | 5d66145 | 2007-08-26 03:42:43 +0000 | [diff] [blame] | 1352 | // ImaginaryLiteral |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1353 | Stmt::child_iterator ImaginaryLiteral::child_begin() { return &Val; } |
| 1354 | Stmt::child_iterator ImaginaryLiteral::child_end() { return &Val+1; } |
Chris Lattner | 5d66145 | 2007-08-26 03:42:43 +0000 | [diff] [blame] | 1355 | |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1356 | // StringLiteral |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1357 | Stmt::child_iterator StringLiteral::child_begin() { return child_iterator(); } |
| 1358 | Stmt::child_iterator StringLiteral::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1359 | |
| 1360 | // ParenExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1361 | Stmt::child_iterator ParenExpr::child_begin() { return &Val; } |
| 1362 | Stmt::child_iterator ParenExpr::child_end() { return &Val+1; } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1363 | |
| 1364 | // UnaryOperator |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1365 | Stmt::child_iterator UnaryOperator::child_begin() { return &Val; } |
| 1366 | Stmt::child_iterator UnaryOperator::child_end() { return &Val+1; } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1367 | |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 1368 | // SizeOfAlignOfExpr |
| 1369 | Stmt::child_iterator SizeOfAlignOfExpr::child_begin() { |
| 1370 | // If this is of a type and the type is a VLA type (and not a typedef), the |
| 1371 | // size expression of the VLA needs to be treated as an executable expression. |
| 1372 | // Why isn't this weirdness documented better in StmtIterator? |
| 1373 | if (isArgumentType()) { |
| 1374 | if (VariableArrayType* T = dyn_cast<VariableArrayType>( |
| 1375 | getArgumentType().getTypePtr())) |
| 1376 | return child_iterator(T); |
| 1377 | return child_iterator(); |
| 1378 | } |
| 1379 | return child_iterator((Stmt**)&Argument); |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1380 | } |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 1381 | Stmt::child_iterator SizeOfAlignOfExpr::child_end() { |
| 1382 | if (isArgumentType()) |
| 1383 | return child_iterator(); |
| 1384 | return child_iterator((Stmt**)&Argument + 1); |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1385 | } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1386 | |
| 1387 | // ArraySubscriptExpr |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1388 | Stmt::child_iterator ArraySubscriptExpr::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1389 | return &SubExprs[0]; |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1390 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1391 | Stmt::child_iterator ArraySubscriptExpr::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1392 | return &SubExprs[0]+END_EXPR; |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1393 | } |
| 1394 | |
| 1395 | // CallExpr |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1396 | Stmt::child_iterator CallExpr::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1397 | return &SubExprs[0]; |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1398 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1399 | Stmt::child_iterator CallExpr::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1400 | return &SubExprs[0]+NumArgs+ARGS_START; |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1401 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1402 | |
| 1403 | // MemberExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1404 | Stmt::child_iterator MemberExpr::child_begin() { return &Base; } |
| 1405 | Stmt::child_iterator MemberExpr::child_end() { return &Base+1; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1406 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 1407 | // ExtVectorElementExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1408 | Stmt::child_iterator ExtVectorElementExpr::child_begin() { return &Base; } |
| 1409 | Stmt::child_iterator ExtVectorElementExpr::child_end() { return &Base+1; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1410 | |
| 1411 | // CompoundLiteralExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1412 | Stmt::child_iterator CompoundLiteralExpr::child_begin() { return &Init; } |
| 1413 | Stmt::child_iterator CompoundLiteralExpr::child_end() { return &Init+1; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1414 | |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1415 | // CastExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1416 | Stmt::child_iterator CastExpr::child_begin() { return &Op; } |
| 1417 | Stmt::child_iterator CastExpr::child_end() { return &Op+1; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1418 | |
| 1419 | // BinaryOperator |
| 1420 | Stmt::child_iterator BinaryOperator::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1421 | return &SubExprs[0]; |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1422 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1423 | Stmt::child_iterator BinaryOperator::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1424 | return &SubExprs[0]+END_EXPR; |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1425 | } |
| 1426 | |
| 1427 | // ConditionalOperator |
| 1428 | Stmt::child_iterator ConditionalOperator::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1429 | return &SubExprs[0]; |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1430 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1431 | Stmt::child_iterator ConditionalOperator::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1432 | return &SubExprs[0]+END_EXPR; |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1433 | } |
| 1434 | |
| 1435 | // AddrLabelExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1436 | Stmt::child_iterator AddrLabelExpr::child_begin() { return child_iterator(); } |
| 1437 | Stmt::child_iterator AddrLabelExpr::child_end() { return child_iterator(); } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1438 | |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1439 | // StmtExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1440 | Stmt::child_iterator StmtExpr::child_begin() { return &SubStmt; } |
| 1441 | Stmt::child_iterator StmtExpr::child_end() { return &SubStmt+1; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1442 | |
| 1443 | // TypesCompatibleExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1444 | Stmt::child_iterator TypesCompatibleExpr::child_begin() { |
| 1445 | return child_iterator(); |
| 1446 | } |
| 1447 | |
| 1448 | Stmt::child_iterator TypesCompatibleExpr::child_end() { |
| 1449 | return child_iterator(); |
| 1450 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1451 | |
| 1452 | // ChooseExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1453 | Stmt::child_iterator ChooseExpr::child_begin() { return &SubExprs[0]; } |
| 1454 | Stmt::child_iterator ChooseExpr::child_end() { return &SubExprs[0]+END_EXPR; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1455 | |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 1456 | // OverloadExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1457 | Stmt::child_iterator OverloadExpr::child_begin() { return &SubExprs[0]; } |
| 1458 | Stmt::child_iterator OverloadExpr::child_end() { return &SubExprs[0]+NumExprs; } |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 1459 | |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1460 | // ShuffleVectorExpr |
| 1461 | Stmt::child_iterator ShuffleVectorExpr::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1462 | return &SubExprs[0]; |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1463 | } |
| 1464 | Stmt::child_iterator ShuffleVectorExpr::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1465 | return &SubExprs[0]+NumExprs; |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1466 | } |
| 1467 | |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1468 | // VAArgExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1469 | Stmt::child_iterator VAArgExpr::child_begin() { return &Val; } |
| 1470 | Stmt::child_iterator VAArgExpr::child_end() { return &Val+1; } |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1471 | |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 1472 | // InitListExpr |
| 1473 | Stmt::child_iterator InitListExpr::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1474 | return InitExprs.size() ? &InitExprs[0] : 0; |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 1475 | } |
| 1476 | Stmt::child_iterator InitListExpr::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1477 | return InitExprs.size() ? &InitExprs[0] + InitExprs.size() : 0; |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 1478 | } |
| 1479 | |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1480 | // ObjCStringLiteral |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1481 | Stmt::child_iterator ObjCStringLiteral::child_begin() { |
| 1482 | return child_iterator(); |
| 1483 | } |
| 1484 | Stmt::child_iterator ObjCStringLiteral::child_end() { |
| 1485 | return child_iterator(); |
| 1486 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1487 | |
| 1488 | // ObjCEncodeExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1489 | Stmt::child_iterator ObjCEncodeExpr::child_begin() { return child_iterator(); } |
| 1490 | Stmt::child_iterator ObjCEncodeExpr::child_end() { return child_iterator(); } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1491 | |
Fariborz Jahanian | b62f681 | 2007-10-16 20:40:23 +0000 | [diff] [blame] | 1492 | // ObjCSelectorExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1493 | Stmt::child_iterator ObjCSelectorExpr::child_begin() { |
| 1494 | return child_iterator(); |
| 1495 | } |
| 1496 | Stmt::child_iterator ObjCSelectorExpr::child_end() { |
| 1497 | return child_iterator(); |
| 1498 | } |
Fariborz Jahanian | b62f681 | 2007-10-16 20:40:23 +0000 | [diff] [blame] | 1499 | |
Fariborz Jahanian | 390d50a | 2007-10-17 16:58:11 +0000 | [diff] [blame] | 1500 | // ObjCProtocolExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1501 | Stmt::child_iterator ObjCProtocolExpr::child_begin() { |
| 1502 | return child_iterator(); |
| 1503 | } |
| 1504 | Stmt::child_iterator ObjCProtocolExpr::child_end() { |
| 1505 | return child_iterator(); |
| 1506 | } |
Fariborz Jahanian | 390d50a | 2007-10-17 16:58:11 +0000 | [diff] [blame] | 1507 | |
Steve Naroff | 563477d | 2007-09-18 23:55:05 +0000 | [diff] [blame] | 1508 | // ObjCMessageExpr |
Ted Kremenek | ea958e57 | 2008-05-01 17:26:20 +0000 | [diff] [blame] | 1509 | Stmt::child_iterator ObjCMessageExpr::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1510 | return getReceiver() ? &SubExprs[0] : &SubExprs[0] + ARGS_START; |
Steve Naroff | 563477d | 2007-09-18 23:55:05 +0000 | [diff] [blame] | 1511 | } |
| 1512 | Stmt::child_iterator ObjCMessageExpr::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1513 | return &SubExprs[0]+ARGS_START+getNumArgs(); |
Steve Naroff | 563477d | 2007-09-18 23:55:05 +0000 | [diff] [blame] | 1514 | } |
| 1515 | |
Steve Naroff | 4eb206b | 2008-09-03 18:15:37 +0000 | [diff] [blame] | 1516 | // Blocks |
Steve Naroff | 56ee689 | 2008-10-08 17:01:13 +0000 | [diff] [blame] | 1517 | Stmt::child_iterator BlockExpr::child_begin() { return child_iterator(); } |
| 1518 | Stmt::child_iterator BlockExpr::child_end() { return child_iterator(); } |
Steve Naroff | 4eb206b | 2008-09-03 18:15:37 +0000 | [diff] [blame] | 1519 | |
Ted Kremenek | 9da13f9 | 2008-09-26 23:24:14 +0000 | [diff] [blame] | 1520 | Stmt::child_iterator BlockDeclRefExpr::child_begin() { return child_iterator();} |
| 1521 | Stmt::child_iterator BlockDeclRefExpr::child_end() { return child_iterator(); } |