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" |
| 15 | #include "clang/AST/DeclObjC.h" |
Chris Lattner | 2eadfb6 | 2007-07-15 23:32:58 +0000 | [diff] [blame] | 16 | #include "clang/AST/ASTContext.h" |
Daniel Dunbar | e91593e | 2008-08-11 04:54:23 +0000 | [diff] [blame] | 17 | #include "clang/AST/RecordLayout.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 18 | #include "clang/AST/StmtVisitor.h" |
Chris Lattner | da5a6b6 | 2007-11-27 18:22:04 +0000 | [diff] [blame] | 19 | #include "clang/Basic/TargetInfo.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 20 | using namespace clang; |
| 21 | |
| 22 | //===----------------------------------------------------------------------===// |
| 23 | // Primary Expressions. |
| 24 | //===----------------------------------------------------------------------===// |
| 25 | |
Chris Lattner | da8249e | 2008-06-07 22:13:43 +0000 | [diff] [blame] | 26 | /// getValueAsApproximateDouble - This returns the value as an inaccurate |
| 27 | /// double. Note that this may cause loss of precision, but is useful for |
| 28 | /// debugging dumps, etc. |
| 29 | double FloatingLiteral::getValueAsApproximateDouble() const { |
| 30 | llvm::APFloat V = getValue(); |
| 31 | V.convert(llvm::APFloat::IEEEdouble, llvm::APFloat::rmNearestTiesToEven); |
| 32 | return V.convertToDouble(); |
| 33 | } |
| 34 | |
| 35 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 36 | StringLiteral::StringLiteral(const char *strData, unsigned byteLength, |
| 37 | bool Wide, QualType t, SourceLocation firstLoc, |
| 38 | SourceLocation lastLoc) : |
| 39 | Expr(StringLiteralClass, t) { |
| 40 | // OPTIMIZE: could allocate this appended to the StringLiteral. |
| 41 | char *AStrData = new char[byteLength]; |
| 42 | memcpy(AStrData, strData, byteLength); |
| 43 | StrData = AStrData; |
| 44 | ByteLength = byteLength; |
| 45 | IsWide = Wide; |
| 46 | firstTokLoc = firstLoc; |
| 47 | lastTokLoc = lastLoc; |
| 48 | } |
| 49 | |
| 50 | StringLiteral::~StringLiteral() { |
| 51 | delete[] StrData; |
| 52 | } |
| 53 | |
| 54 | bool UnaryOperator::isPostfix(Opcode Op) { |
| 55 | switch (Op) { |
| 56 | case PostInc: |
| 57 | case PostDec: |
| 58 | return true; |
| 59 | default: |
| 60 | return false; |
| 61 | } |
| 62 | } |
| 63 | |
Ted Kremenek | 5a56ac3 | 2008-07-23 22:18:43 +0000 | [diff] [blame] | 64 | bool UnaryOperator::isPrefix(Opcode Op) { |
| 65 | switch (Op) { |
| 66 | case PreInc: |
| 67 | case PreDec: |
| 68 | return true; |
| 69 | default: |
| 70 | return false; |
| 71 | } |
| 72 | } |
| 73 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 74 | /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it |
| 75 | /// corresponds to, e.g. "sizeof" or "[pre]++". |
| 76 | const char *UnaryOperator::getOpcodeStr(Opcode Op) { |
| 77 | switch (Op) { |
| 78 | default: assert(0 && "Unknown unary operator"); |
| 79 | case PostInc: return "++"; |
| 80 | case PostDec: return "--"; |
| 81 | case PreInc: return "++"; |
| 82 | case PreDec: return "--"; |
| 83 | case AddrOf: return "&"; |
| 84 | case Deref: return "*"; |
| 85 | case Plus: return "+"; |
| 86 | case Minus: return "-"; |
| 87 | case Not: return "~"; |
| 88 | case LNot: return "!"; |
| 89 | case Real: return "__real"; |
| 90 | case Imag: return "__imag"; |
| 91 | case SizeOf: return "sizeof"; |
| 92 | case AlignOf: return "alignof"; |
| 93 | case Extension: return "__extension__"; |
Chris Lattner | 73d0d4f | 2007-08-30 17:45:32 +0000 | [diff] [blame] | 94 | case OffsetOf: return "__builtin_offsetof"; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 95 | } |
| 96 | } |
| 97 | |
| 98 | //===----------------------------------------------------------------------===// |
| 99 | // Postfix Operators. |
| 100 | //===----------------------------------------------------------------------===// |
| 101 | |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 102 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 103 | CallExpr::CallExpr(Expr *fn, Expr **args, unsigned numargs, QualType t, |
| 104 | SourceLocation rparenloc) |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 105 | : Expr(CallExprClass, t), NumArgs(numargs) { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 106 | SubExprs = new Stmt*[numargs+1]; |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 107 | SubExprs[FN] = fn; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 108 | for (unsigned i = 0; i != numargs; ++i) |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 109 | SubExprs[i+ARGS_START] = args[i]; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 110 | RParenLoc = rparenloc; |
| 111 | } |
| 112 | |
Chris Lattner | d18b329 | 2007-12-28 05:25:02 +0000 | [diff] [blame] | 113 | /// setNumArgs - This changes the number of arguments present in this call. |
| 114 | /// Any orphaned expressions are deleted by this, and any new operands are set |
| 115 | /// to null. |
| 116 | void CallExpr::setNumArgs(unsigned NumArgs) { |
| 117 | // No change, just return. |
| 118 | if (NumArgs == getNumArgs()) return; |
| 119 | |
| 120 | // If shrinking # arguments, just delete the extras and forgot them. |
| 121 | if (NumArgs < getNumArgs()) { |
| 122 | for (unsigned i = NumArgs, e = getNumArgs(); i != e; ++i) |
| 123 | delete getArg(i); |
| 124 | this->NumArgs = NumArgs; |
| 125 | return; |
| 126 | } |
| 127 | |
| 128 | // Otherwise, we are growing the # arguments. New an bigger argument array. |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 129 | Stmt **NewSubExprs = new Stmt*[NumArgs+1]; |
Chris Lattner | d18b329 | 2007-12-28 05:25:02 +0000 | [diff] [blame] | 130 | // Copy over args. |
| 131 | for (unsigned i = 0; i != getNumArgs()+ARGS_START; ++i) |
| 132 | NewSubExprs[i] = SubExprs[i]; |
| 133 | // Null out new args. |
| 134 | for (unsigned i = getNumArgs()+ARGS_START; i != NumArgs+ARGS_START; ++i) |
| 135 | NewSubExprs[i] = 0; |
| 136 | |
| 137 | delete[] SubExprs; |
| 138 | SubExprs = NewSubExprs; |
| 139 | this->NumArgs = NumArgs; |
| 140 | } |
| 141 | |
Steve Naroff | c4f8e8b | 2008-01-31 01:07:12 +0000 | [diff] [blame] | 142 | bool CallExpr::isBuiltinConstantExpr() const { |
| 143 | // All simple function calls (e.g. func()) are implicitly cast to pointer to |
| 144 | // function. As a result, we try and obtain the DeclRefExpr from the |
| 145 | // ImplicitCastExpr. |
| 146 | const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee()); |
| 147 | if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()). |
| 148 | return false; |
| 149 | |
| 150 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr()); |
| 151 | if (!DRE) |
| 152 | return false; |
| 153 | |
Anders Carlsson | bcba201 | 2008-01-31 02:13:57 +0000 | [diff] [blame] | 154 | const FunctionDecl *FDecl = dyn_cast<FunctionDecl>(DRE->getDecl()); |
| 155 | if (!FDecl) |
| 156 | return false; |
| 157 | |
| 158 | unsigned builtinID = FDecl->getIdentifier()->getBuiltinID(); |
| 159 | if (!builtinID) |
| 160 | return false; |
| 161 | |
| 162 | // We have a builtin that is a constant expression |
Eli Friedman | 861dc46 | 2008-05-16 13:28:37 +0000 | [diff] [blame] | 163 | return builtinID == Builtin::BI__builtin___CFStringMakeConstantString || |
Anders Carlsson | 2ea2b5e | 2008-08-25 03:27:15 +0000 | [diff] [blame] | 164 | builtinID == Builtin::BI__builtin_classify_type || |
| 165 | builtinID == Builtin::BI__builtin_huge_valf; |
Steve Naroff | c4f8e8b | 2008-01-31 01:07:12 +0000 | [diff] [blame] | 166 | } |
Chris Lattner | d18b329 | 2007-12-28 05:25:02 +0000 | [diff] [blame] | 167 | |
Steve Naroff | 13b7c5f | 2007-08-08 22:15:55 +0000 | [diff] [blame] | 168 | bool CallExpr::isBuiltinClassifyType(llvm::APSInt &Result) const { |
| 169 | // The following enum mimics gcc's internal "typeclass.h" file. |
| 170 | enum gcc_type_class { |
| 171 | no_type_class = -1, |
| 172 | void_type_class, integer_type_class, char_type_class, |
| 173 | enumeral_type_class, boolean_type_class, |
| 174 | pointer_type_class, reference_type_class, offset_type_class, |
| 175 | real_type_class, complex_type_class, |
| 176 | function_type_class, method_type_class, |
| 177 | record_type_class, union_type_class, |
| 178 | array_type_class, string_type_class, |
| 179 | lang_type_class |
| 180 | }; |
| 181 | Result.setIsSigned(true); |
| 182 | |
| 183 | // All simple function calls (e.g. func()) are implicitly cast to pointer to |
| 184 | // function. As a result, we try and obtain the DeclRefExpr from the |
| 185 | // ImplicitCastExpr. |
| 186 | const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(getCallee()); |
| 187 | if (!ICE) // FIXME: deal with more complex calls (e.g. (func)(), (*func)()). |
| 188 | return false; |
| 189 | const DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(ICE->getSubExpr()); |
| 190 | if (!DRE) |
| 191 | return false; |
| 192 | |
| 193 | // We have a DeclRefExpr. |
| 194 | if (strcmp(DRE->getDecl()->getName(), "__builtin_classify_type") == 0) { |
| 195 | // If no argument was supplied, default to "no_type_class". This isn't |
| 196 | // ideal, however it's what gcc does. |
| 197 | Result = static_cast<uint64_t>(no_type_class); |
| 198 | if (NumArgs >= 1) { |
| 199 | QualType argType = getArg(0)->getType(); |
| 200 | |
| 201 | if (argType->isVoidType()) |
| 202 | Result = void_type_class; |
| 203 | else if (argType->isEnumeralType()) |
| 204 | Result = enumeral_type_class; |
| 205 | else if (argType->isBooleanType()) |
| 206 | Result = boolean_type_class; |
| 207 | else if (argType->isCharType()) |
| 208 | Result = string_type_class; // gcc doesn't appear to use char_type_class |
| 209 | else if (argType->isIntegerType()) |
| 210 | Result = integer_type_class; |
| 211 | else if (argType->isPointerType()) |
| 212 | Result = pointer_type_class; |
| 213 | else if (argType->isReferenceType()) |
| 214 | Result = reference_type_class; |
| 215 | else if (argType->isRealType()) |
| 216 | Result = real_type_class; |
| 217 | else if (argType->isComplexType()) |
| 218 | Result = complex_type_class; |
| 219 | else if (argType->isFunctionType()) |
| 220 | Result = function_type_class; |
| 221 | else if (argType->isStructureType()) |
| 222 | Result = record_type_class; |
| 223 | else if (argType->isUnionType()) |
| 224 | Result = union_type_class; |
| 225 | else if (argType->isArrayType()) |
| 226 | Result = array_type_class; |
| 227 | else if (argType->isUnionType()) |
| 228 | Result = union_type_class; |
| 229 | else // FIXME: offset_type_class, method_type_class, & lang_type_class? |
Chris Lattner | 3ef5bc0 | 2007-11-08 17:56:40 +0000 | [diff] [blame] | 230 | assert(0 && "CallExpr::isBuiltinClassifyType(): unimplemented type"); |
Steve Naroff | 13b7c5f | 2007-08-08 22:15:55 +0000 | [diff] [blame] | 231 | } |
| 232 | return true; |
| 233 | } |
| 234 | return false; |
| 235 | } |
| 236 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 237 | /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it |
| 238 | /// corresponds to, e.g. "<<=". |
| 239 | const char *BinaryOperator::getOpcodeStr(Opcode Op) { |
| 240 | switch (Op) { |
| 241 | default: assert(0 && "Unknown binary operator"); |
| 242 | case Mul: return "*"; |
| 243 | case Div: return "/"; |
| 244 | case Rem: return "%"; |
| 245 | case Add: return "+"; |
| 246 | case Sub: return "-"; |
| 247 | case Shl: return "<<"; |
| 248 | case Shr: return ">>"; |
| 249 | case LT: return "<"; |
| 250 | case GT: return ">"; |
| 251 | case LE: return "<="; |
| 252 | case GE: return ">="; |
| 253 | case EQ: return "=="; |
| 254 | case NE: return "!="; |
| 255 | case And: return "&"; |
| 256 | case Xor: return "^"; |
| 257 | case Or: return "|"; |
| 258 | case LAnd: return "&&"; |
| 259 | case LOr: return "||"; |
| 260 | case Assign: return "="; |
| 261 | case MulAssign: return "*="; |
| 262 | case DivAssign: return "/="; |
| 263 | case RemAssign: return "%="; |
| 264 | case AddAssign: return "+="; |
| 265 | case SubAssign: return "-="; |
| 266 | case ShlAssign: return "<<="; |
| 267 | case ShrAssign: return ">>="; |
| 268 | case AndAssign: return "&="; |
| 269 | case XorAssign: return "^="; |
| 270 | case OrAssign: return "|="; |
| 271 | case Comma: return ","; |
| 272 | } |
| 273 | } |
| 274 | |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 275 | InitListExpr::InitListExpr(SourceLocation lbraceloc, |
| 276 | Expr **initexprs, unsigned numinits, |
| 277 | SourceLocation rbraceloc) |
Steve Naroff | c5ae899 | 2008-05-01 02:04:18 +0000 | [diff] [blame] | 278 | : Expr(InitListExprClass, QualType()), |
| 279 | LBraceLoc(lbraceloc), RBraceLoc(rbraceloc) |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 280 | { |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 281 | for (unsigned i = 0; i != numinits; i++) |
Steve Naroff | c5ae899 | 2008-05-01 02:04:18 +0000 | [diff] [blame] | 282 | InitExprs.push_back(initexprs[i]); |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 283 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 284 | |
Steve Naroff | 4eb206b | 2008-09-03 18:15:37 +0000 | [diff] [blame^] | 285 | /// getFunctionType - Return the underlying function type for this closure. |
| 286 | /// |
| 287 | const FunctionType *BlockExpr::getFunctionType() const { |
| 288 | return getType()->getAsBlockPointerType()-> |
| 289 | getPointeeType()->getAsFunctionType(); |
| 290 | } |
| 291 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 292 | //===----------------------------------------------------------------------===// |
| 293 | // Generic Expression Routines |
| 294 | //===----------------------------------------------------------------------===// |
| 295 | |
| 296 | /// hasLocalSideEffect - Return true if this immediate expression has side |
| 297 | /// effects, not counting any sub-expressions. |
| 298 | bool Expr::hasLocalSideEffect() const { |
| 299 | switch (getStmtClass()) { |
| 300 | default: |
| 301 | return false; |
| 302 | case ParenExprClass: |
| 303 | return cast<ParenExpr>(this)->getSubExpr()->hasLocalSideEffect(); |
| 304 | case UnaryOperatorClass: { |
| 305 | const UnaryOperator *UO = cast<UnaryOperator>(this); |
| 306 | |
| 307 | switch (UO->getOpcode()) { |
| 308 | default: return false; |
| 309 | case UnaryOperator::PostInc: |
| 310 | case UnaryOperator::PostDec: |
| 311 | case UnaryOperator::PreInc: |
| 312 | case UnaryOperator::PreDec: |
| 313 | return true; // ++/-- |
| 314 | |
| 315 | case UnaryOperator::Deref: |
| 316 | // Dereferencing a volatile pointer is a side-effect. |
| 317 | return getType().isVolatileQualified(); |
| 318 | case UnaryOperator::Real: |
| 319 | case UnaryOperator::Imag: |
| 320 | // accessing a piece of a volatile complex is a side-effect. |
| 321 | return UO->getSubExpr()->getType().isVolatileQualified(); |
| 322 | |
| 323 | case UnaryOperator::Extension: |
| 324 | return UO->getSubExpr()->hasLocalSideEffect(); |
| 325 | } |
| 326 | } |
Chris Lattner | e7716e6 | 2007-12-01 06:07:34 +0000 | [diff] [blame] | 327 | case BinaryOperatorClass: { |
| 328 | const BinaryOperator *BinOp = cast<BinaryOperator>(this); |
| 329 | // Consider comma to have side effects if the LHS and RHS both do. |
| 330 | if (BinOp->getOpcode() == BinaryOperator::Comma) |
| 331 | return BinOp->getLHS()->hasLocalSideEffect() && |
| 332 | BinOp->getRHS()->hasLocalSideEffect(); |
| 333 | |
| 334 | return BinOp->isAssignmentOp(); |
| 335 | } |
Chris Lattner | eb14fe8 | 2007-08-25 02:00:02 +0000 | [diff] [blame] | 336 | case CompoundAssignOperatorClass: |
Chris Lattner | 1f683e9 | 2007-08-25 01:55:00 +0000 | [diff] [blame] | 337 | return true; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 338 | |
Fariborz Jahanian | ab38e4b | 2007-12-01 19:58:28 +0000 | [diff] [blame] | 339 | case ConditionalOperatorClass: { |
| 340 | const ConditionalOperator *Exp = cast<ConditionalOperator>(this); |
| 341 | return Exp->getCond()->hasLocalSideEffect() |
| 342 | || (Exp->getLHS() && Exp->getLHS()->hasLocalSideEffect()) |
| 343 | || (Exp->getRHS() && Exp->getRHS()->hasLocalSideEffect()); |
| 344 | } |
| 345 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 346 | case MemberExprClass: |
| 347 | case ArraySubscriptExprClass: |
| 348 | // If the base pointer or element is to a volatile pointer/field, accessing |
| 349 | // if is a side effect. |
| 350 | return getType().isVolatileQualified(); |
Eli Friedman | 211f6ad | 2008-05-27 15:24:04 +0000 | [diff] [blame] | 351 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 352 | case CallExprClass: |
| 353 | // TODO: check attributes for pure/const. "void foo() { strlen("bar"); }" |
| 354 | // should warn. |
| 355 | return true; |
Chris Lattner | a9c0102 | 2007-09-26 22:06:30 +0000 | [diff] [blame] | 356 | case ObjCMessageExprClass: |
| 357 | return true; |
Chris Lattner | 611b2ec | 2008-07-26 19:51:01 +0000 | [diff] [blame] | 358 | case StmtExprClass: { |
| 359 | // Statement exprs don't logically have side effects themselves, but are |
| 360 | // sometimes used in macros in ways that give them a type that is unused. |
| 361 | // For example ({ blah; foo(); }) will end up with a type if foo has a type. |
| 362 | // however, if the result of the stmt expr is dead, we don't want to emit a |
| 363 | // warning. |
| 364 | const CompoundStmt *CS = cast<StmtExpr>(this)->getSubStmt(); |
| 365 | if (!CS->body_empty()) |
| 366 | if (const Expr *E = dyn_cast<Expr>(CS->body_back())) |
| 367 | return E->hasLocalSideEffect(); |
| 368 | return false; |
| 369 | } |
Argyrios Kyrtzidis | 0835a3c | 2008-08-18 23:01:59 +0000 | [diff] [blame] | 370 | case ExplicitCastExprClass: |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 371 | case CXXFunctionalCastExprClass: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 372 | // If this is a cast to void, check the operand. Otherwise, the result of |
| 373 | // the cast is unused. |
| 374 | if (getType()->isVoidType()) |
| 375 | return cast<CastExpr>(this)->getSubExpr()->hasLocalSideEffect(); |
| 376 | return false; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 377 | |
Eli Friedman | 4be1f47 | 2008-05-19 21:24:43 +0000 | [diff] [blame] | 378 | case ImplicitCastExprClass: |
| 379 | // Check the operand, since implicit casts are inserted by Sema |
| 380 | return cast<ImplicitCastExpr>(this)->getSubExpr()->hasLocalSideEffect(); |
| 381 | |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 382 | case CXXDefaultArgExprClass: |
| 383 | return cast<CXXDefaultArgExpr>(this)->getExpr()->hasLocalSideEffect(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 384 | } |
| 385 | } |
| 386 | |
| 387 | /// isLvalue - C99 6.3.2.1: an lvalue is an expression with an object type or an |
| 388 | /// incomplete type other than void. Nonarray expressions that can be lvalues: |
| 389 | /// - name, where name must be a variable |
| 390 | /// - e[i] |
| 391 | /// - (e), where e must be an lvalue |
| 392 | /// - e.name, where e must be an lvalue |
| 393 | /// - e->name |
| 394 | /// - *e, the type of e cannot be a function type |
| 395 | /// - string-constant |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 396 | /// - (__real__ e) and (__imag__ e) where e is an lvalue [GNU extension] |
Bill Wendling | 08ad47c | 2007-07-17 03:52:31 +0000 | [diff] [blame] | 397 | /// - reference type [C++ [expr]] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 398 | /// |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 399 | Expr::isLvalueResult Expr::isLvalue(ASTContext &Ctx) const { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 400 | // first, check the type (C99 6.3.2.1) |
Chris Lattner | cb4f9a6 | 2007-07-21 05:33:26 +0000 | [diff] [blame] | 401 | if (TR->isFunctionType()) // from isObjectType() |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 402 | return LV_NotObjectType; |
| 403 | |
Steve Naroff | acb818a | 2008-02-10 01:39:04 +0000 | [diff] [blame] | 404 | // Allow qualified void which is an incomplete type other than void (yuck). |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 405 | if (TR->isVoidType() && !Ctx.getCanonicalType(TR).getCVRQualifiers()) |
Steve Naroff | acb818a | 2008-02-10 01:39:04 +0000 | [diff] [blame] | 406 | return LV_IncompleteVoidType; |
| 407 | |
Chris Lattner | cb4f9a6 | 2007-07-21 05:33:26 +0000 | [diff] [blame] | 408 | if (TR->isReferenceType()) // C++ [expr] |
Bill Wendling | 08ad47c | 2007-07-17 03:52:31 +0000 | [diff] [blame] | 409 | return LV_Valid; |
| 410 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 411 | // the type looks fine, now check the expression |
| 412 | switch (getStmtClass()) { |
| 413 | case StringLiteralClass: // C99 6.5.1p4 |
Anders Carlsson | 7323a62 | 2007-11-30 22:47:59 +0000 | [diff] [blame] | 414 | return LV_Valid; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 415 | case ArraySubscriptExprClass: // C99 6.5.3p4 (e1[e2] == (*((e1)+(e2)))) |
| 416 | // For vectors, make sure base is an lvalue (i.e. not a function call). |
| 417 | if (cast<ArraySubscriptExpr>(this)->getBase()->getType()->isVectorType()) |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 418 | return cast<ArraySubscriptExpr>(this)->getBase()->isLvalue(Ctx); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 419 | return LV_Valid; |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 420 | case DeclRefExprClass: { // C99 6.5.1p2 |
| 421 | const Decl *RefdDecl = cast<DeclRefExpr>(this)->getDecl(); |
| 422 | if (isa<VarDecl>(RefdDecl) || isa<ImplicitParamDecl>(RefdDecl)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 423 | return LV_Valid; |
| 424 | break; |
Chris Lattner | 4111024 | 2008-06-17 18:05:57 +0000 | [diff] [blame] | 425 | } |
Anton Korobeynikov | fdd7566 | 2007-07-12 15:26:50 +0000 | [diff] [blame] | 426 | case MemberExprClass: { // C99 6.5.2.3p4 |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 427 | const MemberExpr *m = cast<MemberExpr>(this); |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 428 | return m->isArrow() ? LV_Valid : m->getBase()->isLvalue(Ctx); |
Anton Korobeynikov | fdd7566 | 2007-07-12 15:26:50 +0000 | [diff] [blame] | 429 | } |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 430 | case UnaryOperatorClass: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 431 | if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Deref) |
Chris Lattner | 7da36f6 | 2007-10-30 22:53:42 +0000 | [diff] [blame] | 432 | return LV_Valid; // C99 6.5.3p4 |
| 433 | |
| 434 | if (cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Real || |
Chris Lattner | baf0d66 | 2008-07-25 18:07:19 +0000 | [diff] [blame] | 435 | cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Imag || |
| 436 | cast<UnaryOperator>(this)->getOpcode() == UnaryOperator::Extension) |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 437 | return cast<UnaryOperator>(this)->getSubExpr()->isLvalue(Ctx); // GNU. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 438 | break; |
| 439 | case ParenExprClass: // C99 6.5.1p5 |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 440 | return cast<ParenExpr>(this)->getSubExpr()->isLvalue(Ctx); |
Steve Naroff | e638639 | 2007-12-05 04:00:10 +0000 | [diff] [blame] | 441 | case CompoundLiteralExprClass: // C99 6.5.2.5p5 |
| 442 | return LV_Valid; |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 443 | case ExtVectorElementExprClass: |
| 444 | if (cast<ExtVectorElementExpr>(this)->containsDuplicateElements()) |
Steve Naroff | fec0b49 | 2007-07-30 03:29:09 +0000 | [diff] [blame] | 445 | return LV_DuplicateVectorComponents; |
| 446 | return LV_Valid; |
Steve Naroff | 027282d | 2007-11-12 14:34:27 +0000 | [diff] [blame] | 447 | case ObjCIvarRefExprClass: // ObjC instance variables are lvalues. |
| 448 | return LV_Valid; |
Steve Naroff | 799a6a6 | 2008-05-30 23:23:16 +0000 | [diff] [blame] | 449 | case ObjCPropertyRefExprClass: // FIXME: check if read-only property. |
| 450 | return LV_Valid; |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 451 | case PredefinedExprClass: |
| 452 | return (cast<PredefinedExpr>(this)->getIdentType() |
| 453 | == PredefinedExpr::CXXThis |
Chris Lattner | 7c4a191 | 2008-07-25 23:30:42 +0000 | [diff] [blame] | 454 | ? LV_InvalidExpression : LV_Valid); |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 455 | case CXXDefaultArgExprClass: |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 456 | return cast<CXXDefaultArgExpr>(this)->getExpr()->isLvalue(Ctx); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 457 | default: |
| 458 | break; |
| 459 | } |
| 460 | return LV_InvalidExpression; |
| 461 | } |
| 462 | |
| 463 | /// isModifiableLvalue - C99 6.3.2.1: an lvalue that does not have array type, |
| 464 | /// does not have an incomplete type, does not have a const-qualified type, and |
| 465 | /// if it is a structure or union, does not have any member (including, |
| 466 | /// recursively, any member or element of all contained aggregates or unions) |
| 467 | /// with a const-qualified type. |
Chris Lattner | 28be73f | 2008-07-26 21:30:36 +0000 | [diff] [blame] | 468 | Expr::isModifiableLvalueResult Expr::isModifiableLvalue(ASTContext &Ctx) const { |
| 469 | isLvalueResult lvalResult = isLvalue(Ctx); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 470 | |
| 471 | switch (lvalResult) { |
| 472 | case LV_Valid: break; |
| 473 | case LV_NotObjectType: return MLV_NotObjectType; |
| 474 | case LV_IncompleteVoidType: return MLV_IncompleteVoidType; |
Steve Naroff | fec0b49 | 2007-07-30 03:29:09 +0000 | [diff] [blame] | 475 | case LV_DuplicateVectorComponents: return MLV_DuplicateVectorComponents; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 476 | case LV_InvalidExpression: return MLV_InvalidExpression; |
| 477 | } |
Chris Lattner | c63a1f2 | 2008-08-04 07:31:14 +0000 | [diff] [blame] | 478 | |
| 479 | QualType CT = Ctx.getCanonicalType(getType()); |
| 480 | |
| 481 | if (CT.isConstQualified()) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 482 | return MLV_ConstQualified; |
Chris Lattner | c63a1f2 | 2008-08-04 07:31:14 +0000 | [diff] [blame] | 483 | if (CT->isArrayType()) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 484 | return MLV_ArrayType; |
Chris Lattner | c63a1f2 | 2008-08-04 07:31:14 +0000 | [diff] [blame] | 485 | if (CT->isIncompleteType()) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 486 | return MLV_IncompleteType; |
| 487 | |
Chris Lattner | c63a1f2 | 2008-08-04 07:31:14 +0000 | [diff] [blame] | 488 | if (const RecordType *r = CT->getAsRecordType()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 489 | if (r->hasConstFields()) |
| 490 | return MLV_ConstQualified; |
| 491 | } |
| 492 | return MLV_Valid; |
| 493 | } |
| 494 | |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 495 | /// hasGlobalStorage - Return true if this expression has static storage |
Chris Lattner | 4cc6271 | 2007-11-27 21:35:27 +0000 | [diff] [blame] | 496 | /// duration. This means that the address of this expression is a link-time |
| 497 | /// constant. |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 498 | bool Expr::hasGlobalStorage() const { |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 499 | switch (getStmtClass()) { |
| 500 | default: |
| 501 | return false; |
Chris Lattner | 4cc6271 | 2007-11-27 21:35:27 +0000 | [diff] [blame] | 502 | case ParenExprClass: |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 503 | return cast<ParenExpr>(this)->getSubExpr()->hasGlobalStorage(); |
Chris Lattner | 4cc6271 | 2007-11-27 21:35:27 +0000 | [diff] [blame] | 504 | case ImplicitCastExprClass: |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 505 | return cast<ImplicitCastExpr>(this)->getSubExpr()->hasGlobalStorage(); |
Steve Naroff | e9b1219 | 2008-01-14 18:19:28 +0000 | [diff] [blame] | 506 | case CompoundLiteralExprClass: |
| 507 | return cast<CompoundLiteralExpr>(this)->isFileScope(); |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 508 | case DeclRefExprClass: { |
| 509 | const Decl *D = cast<DeclRefExpr>(this)->getDecl(); |
| 510 | if (const VarDecl *VD = dyn_cast<VarDecl>(D)) |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 511 | return VD->hasGlobalStorage(); |
Seo Sanghyeon | 63f067f | 2008-04-04 09:45:30 +0000 | [diff] [blame] | 512 | if (isa<FunctionDecl>(D)) |
| 513 | return true; |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 514 | return false; |
| 515 | } |
Chris Lattner | fb70806 | 2007-11-28 04:30:09 +0000 | [diff] [blame] | 516 | case MemberExprClass: { |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 517 | const MemberExpr *M = cast<MemberExpr>(this); |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 518 | return !M->isArrow() && M->getBase()->hasGlobalStorage(); |
Chris Lattner | fb70806 | 2007-11-28 04:30:09 +0000 | [diff] [blame] | 519 | } |
Chris Lattner | 4cc6271 | 2007-11-27 21:35:27 +0000 | [diff] [blame] | 520 | case ArraySubscriptExprClass: |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 521 | return cast<ArraySubscriptExpr>(this)->getBase()->hasGlobalStorage(); |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 522 | case PredefinedExprClass: |
Chris Lattner | fa28b30 | 2008-01-12 08:14:25 +0000 | [diff] [blame] | 523 | return true; |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 524 | case CXXDefaultArgExprClass: |
| 525 | return cast<CXXDefaultArgExpr>(this)->getExpr()->hasGlobalStorage(); |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 526 | } |
| 527 | } |
| 528 | |
Ted Kremenek | 4e99a5f | 2008-01-17 16:57:34 +0000 | [diff] [blame] | 529 | Expr* Expr::IgnoreParens() { |
| 530 | Expr* E = this; |
| 531 | while (ParenExpr* P = dyn_cast<ParenExpr>(E)) |
| 532 | E = P->getSubExpr(); |
| 533 | |
| 534 | return E; |
| 535 | } |
| 536 | |
Chris Lattner | 56f3494 | 2008-02-13 01:02:39 +0000 | [diff] [blame] | 537 | /// IgnoreParenCasts - Ignore parentheses and casts. Strip off any ParenExpr |
| 538 | /// or CastExprs or ImplicitCastExprs, returning their operand. |
| 539 | Expr *Expr::IgnoreParenCasts() { |
| 540 | Expr *E = this; |
| 541 | while (true) { |
| 542 | if (ParenExpr *P = dyn_cast<ParenExpr>(E)) |
| 543 | E = P->getSubExpr(); |
| 544 | else if (CastExpr *P = dyn_cast<CastExpr>(E)) |
| 545 | E = P->getSubExpr(); |
Chris Lattner | 56f3494 | 2008-02-13 01:02:39 +0000 | [diff] [blame] | 546 | else |
| 547 | return E; |
| 548 | } |
| 549 | } |
| 550 | |
| 551 | |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 552 | bool Expr::isConstantExpr(ASTContext &Ctx, SourceLocation *Loc) const { |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 553 | switch (getStmtClass()) { |
| 554 | default: |
| 555 | if (Loc) *Loc = getLocStart(); |
| 556 | return false; |
| 557 | case ParenExprClass: |
| 558 | return cast<ParenExpr>(this)->getSubExpr()->isConstantExpr(Ctx, Loc); |
| 559 | case StringLiteralClass: |
Steve Naroff | 5d37e32 | 2007-11-09 15:00:03 +0000 | [diff] [blame] | 560 | case ObjCStringLiteralClass: |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 561 | case FloatingLiteralClass: |
| 562 | case IntegerLiteralClass: |
| 563 | case CharacterLiteralClass: |
| 564 | case ImaginaryLiteralClass: |
Anders Carlsson | 1a86b33 | 2007-10-17 00:52:43 +0000 | [diff] [blame] | 565 | case TypesCompatibleExprClass: |
| 566 | case CXXBoolLiteralExprClass: |
Anders Carlsson | 15425f9 | 2008-08-23 18:49:32 +0000 | [diff] [blame] | 567 | case AddrLabelExprClass: |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 568 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 569 | case CallExprClass: { |
| 570 | const CallExpr *CE = cast<CallExpr>(this); |
Steve Naroff | c4f8e8b | 2008-01-31 01:07:12 +0000 | [diff] [blame] | 571 | if (CE->isBuiltinConstantExpr()) |
| 572 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 573 | if (Loc) *Loc = getLocStart(); |
| 574 | return false; |
| 575 | } |
Chris Lattner | 4ef8dd6 | 2007-11-01 02:45:17 +0000 | [diff] [blame] | 576 | case DeclRefExprClass: { |
| 577 | const Decl *D = cast<DeclRefExpr>(this)->getDecl(); |
| 578 | // Accept address of function. |
| 579 | if (isa<EnumConstantDecl>(D) || isa<FunctionDecl>(D)) |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 580 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 581 | if (Loc) *Loc = getLocStart(); |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 582 | if (isa<VarDecl>(D)) |
| 583 | return TR->isArrayType(); |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 584 | return false; |
Chris Lattner | 4ef8dd6 | 2007-11-01 02:45:17 +0000 | [diff] [blame] | 585 | } |
Steve Naroff | b8f13a8 | 2008-01-09 00:05:37 +0000 | [diff] [blame] | 586 | case CompoundLiteralExprClass: |
| 587 | if (Loc) *Loc = getLocStart(); |
| 588 | // 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] | 589 | // Allow "(vector type){2,4}" since the elements are all constant. |
| 590 | return TR->isArrayType() || TR->isVectorType(); |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 591 | case UnaryOperatorClass: { |
| 592 | const UnaryOperator *Exp = cast<UnaryOperator>(this); |
| 593 | |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 594 | // C99 6.6p9 |
Chris Lattner | 239c15e | 2007-12-11 23:11:17 +0000 | [diff] [blame] | 595 | if (Exp->getOpcode() == UnaryOperator::AddrOf) { |
Ted Kremenek | 2e5f54a | 2008-02-27 18:39:48 +0000 | [diff] [blame] | 596 | if (!Exp->getSubExpr()->hasGlobalStorage()) { |
Chris Lattner | 239c15e | 2007-12-11 23:11:17 +0000 | [diff] [blame] | 597 | if (Loc) *Loc = getLocStart(); |
| 598 | return false; |
| 599 | } |
| 600 | return true; |
| 601 | } |
Chris Lattner | 1d09ecc | 2007-11-13 18:05:45 +0000 | [diff] [blame] | 602 | |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 603 | // Get the operand value. If this is sizeof/alignof, do not evalute the |
| 604 | // operand. This affects C99 6.6p3. |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 605 | if (!Exp->isSizeOfAlignOfOp() && |
| 606 | Exp->getOpcode() != UnaryOperator::OffsetOf && |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 607 | !Exp->getSubExpr()->isConstantExpr(Ctx, Loc)) |
| 608 | return false; |
| 609 | |
| 610 | switch (Exp->getOpcode()) { |
| 611 | // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. |
| 612 | // See C99 6.6p3. |
| 613 | default: |
| 614 | if (Loc) *Loc = Exp->getOperatorLoc(); |
| 615 | return false; |
| 616 | case UnaryOperator::Extension: |
| 617 | return true; // FIXME: this is wrong. |
| 618 | case UnaryOperator::SizeOf: |
| 619 | case UnaryOperator::AlignOf: |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 620 | case UnaryOperator::OffsetOf: |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 621 | // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. |
Eli Friedman | 3c2b317 | 2008-02-15 12:20:59 +0000 | [diff] [blame] | 622 | if (!Exp->getSubExpr()->getType()->isConstantSizeType()) { |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 623 | if (Loc) *Loc = Exp->getOperatorLoc(); |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 624 | return false; |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 625 | } |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 626 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 627 | case UnaryOperator::LNot: |
| 628 | case UnaryOperator::Plus: |
| 629 | case UnaryOperator::Minus: |
| 630 | case UnaryOperator::Not: |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 631 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 632 | } |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 633 | } |
| 634 | case SizeOfAlignOfTypeExprClass: { |
| 635 | const SizeOfAlignOfTypeExpr *Exp = cast<SizeOfAlignOfTypeExpr>(this); |
| 636 | // alignof always evaluates to a constant. |
Chris Lattner | a269ebf | 2008-02-21 05:45:29 +0000 | [diff] [blame] | 637 | if (Exp->isSizeOf() && !Exp->getArgumentType()->isVoidType() && |
| 638 | !Exp->getArgumentType()->isConstantSizeType()) { |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 639 | if (Loc) *Loc = Exp->getOperatorLoc(); |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 640 | return false; |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 641 | } |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 642 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 643 | } |
| 644 | case BinaryOperatorClass: { |
| 645 | const BinaryOperator *Exp = cast<BinaryOperator>(this); |
| 646 | |
| 647 | // The LHS of a constant expr is always evaluated and needed. |
| 648 | if (!Exp->getLHS()->isConstantExpr(Ctx, Loc)) |
| 649 | return false; |
| 650 | |
| 651 | if (!Exp->getRHS()->isConstantExpr(Ctx, Loc)) |
| 652 | return false; |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 653 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 654 | } |
| 655 | case ImplicitCastExprClass: |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 656 | case ExplicitCastExprClass: |
| 657 | case CXXFunctionalCastExprClass: { |
Argyrios Kyrtzidis | 0835a3c | 2008-08-18 23:01:59 +0000 | [diff] [blame] | 658 | const Expr *SubExpr = cast<CastExpr>(this)->getSubExpr(); |
| 659 | SourceLocation CastLoc = getLocStart(); |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 660 | if (!SubExpr->isConstantExpr(Ctx, Loc)) { |
| 661 | if (Loc) *Loc = SubExpr->getLocStart(); |
| 662 | return false; |
| 663 | } |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 664 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 665 | } |
| 666 | case ConditionalOperatorClass: { |
| 667 | const ConditionalOperator *Exp = cast<ConditionalOperator>(this); |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 668 | if (!Exp->getCond()->isConstantExpr(Ctx, Loc) || |
Anders Carlsson | 3907323 | 2007-11-30 19:04:31 +0000 | [diff] [blame] | 669 | // Handle the GNU extension for missing LHS. |
| 670 | !(Exp->getLHS() && Exp->getLHS()->isConstantExpr(Ctx, Loc)) || |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 671 | !Exp->getRHS()->isConstantExpr(Ctx, Loc)) |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 672 | return false; |
Chris Lattner | 2777e49 | 2007-10-18 00:20:32 +0000 | [diff] [blame] | 673 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 674 | } |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 675 | case InitListExprClass: { |
| 676 | const InitListExpr *Exp = cast<InitListExpr>(this); |
| 677 | unsigned numInits = Exp->getNumInits(); |
| 678 | for (unsigned i = 0; i < numInits; i++) { |
| 679 | if (!Exp->getInit(i)->isConstantExpr(Ctx, Loc)) { |
| 680 | if (Loc) *Loc = Exp->getInit(i)->getLocStart(); |
| 681 | return false; |
| 682 | } |
| 683 | } |
| 684 | return true; |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 685 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 686 | case CXXDefaultArgExprClass: |
| 687 | return cast<CXXDefaultArgExpr>(this)->getExpr()->isConstantExpr(Ctx, Loc); |
Steve Naroff | d0091aa | 2008-01-10 22:15:12 +0000 | [diff] [blame] | 688 | } |
Steve Naroff | 38374b0 | 2007-09-02 20:30:18 +0000 | [diff] [blame] | 689 | } |
| 690 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 691 | /// isIntegerConstantExpr - this recursive routine will test if an expression is |
| 692 | /// an integer constant expression. Note: With the introduction of VLA's in |
| 693 | /// C99 the result of the sizeof operator is no longer always a constant |
| 694 | /// expression. The generalization of the wording to include any subexpression |
| 695 | /// that is not evaluated (C99 6.6p3) means that nonconstant subexpressions |
| 696 | /// can appear as operands to other operators (e.g. &&, ||, ?:). For instance, |
Nuno Lopes | 5f6b632 | 2008-07-08 21:13:06 +0000 | [diff] [blame] | 697 | /// "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] | 698 | /// occurring in a context requiring a constant, would have been a constraint |
| 699 | /// violation. FIXME: This routine currently implements C90 semantics. |
| 700 | /// To properly implement C99 semantics this routine will need to evaluate |
| 701 | /// expressions involving operators previously mentioned. |
| 702 | |
| 703 | /// FIXME: Pass up a reason why! Invalid operation in i-c-e, division by zero, |
| 704 | /// comma, etc |
| 705 | /// |
| 706 | /// 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] | 707 | /// permit this. This includes things like (int)1e1000 |
Chris Lattner | ce0afc0 | 2007-07-18 05:21:20 +0000 | [diff] [blame] | 708 | /// |
| 709 | /// FIXME: Handle offsetof. Two things to do: Handle GCC's __builtin_offsetof |
| 710 | /// to support gcc 4.0+ and handle the idiom GCC recognizes with a null pointer |
| 711 | /// cast+dereference. |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 712 | bool Expr::isIntegerConstantExpr(llvm::APSInt &Result, ASTContext &Ctx, |
| 713 | SourceLocation *Loc, bool isEvaluated) const { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 714 | switch (getStmtClass()) { |
| 715 | default: |
| 716 | if (Loc) *Loc = getLocStart(); |
| 717 | return false; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 718 | case ParenExprClass: |
| 719 | return cast<ParenExpr>(this)->getSubExpr()-> |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 720 | isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 721 | case IntegerLiteralClass: |
| 722 | Result = cast<IntegerLiteral>(this)->getValue(); |
| 723 | break; |
Chris Lattner | 2eadfb6 | 2007-07-15 23:32:58 +0000 | [diff] [blame] | 724 | case CharacterLiteralClass: { |
| 725 | const CharacterLiteral *CL = cast<CharacterLiteral>(this); |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 726 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Chris Lattner | 2eadfb6 | 2007-07-15 23:32:58 +0000 | [diff] [blame] | 727 | Result = CL->getValue(); |
Chris Lattner | f0fbcb3 | 2007-07-16 21:04:56 +0000 | [diff] [blame] | 728 | Result.setIsUnsigned(!getType()->isSignedIntegerType()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 729 | break; |
Chris Lattner | 2eadfb6 | 2007-07-15 23:32:58 +0000 | [diff] [blame] | 730 | } |
Anders Carlsson | b88d45e | 2008-08-23 21:12:35 +0000 | [diff] [blame] | 731 | case CXXBoolLiteralExprClass: { |
| 732 | const CXXBoolLiteralExpr *BL = cast<CXXBoolLiteralExpr>(this); |
| 733 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
| 734 | Result = BL->getValue(); |
| 735 | Result.setIsUnsigned(!getType()->isSignedIntegerType()); |
| 736 | break; |
| 737 | } |
Argyrios Kyrtzidis | 7267f78 | 2008-08-23 19:35:47 +0000 | [diff] [blame] | 738 | case CXXZeroInitValueExprClass: |
| 739 | Result.clear(); |
| 740 | break; |
Steve Naroff | 7b658aa | 2007-08-02 04:09:23 +0000 | [diff] [blame] | 741 | case TypesCompatibleExprClass: { |
| 742 | const TypesCompatibleExpr *TCE = cast<TypesCompatibleExpr>(this); |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 743 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Steve Naroff | ec0550f | 2007-10-15 20:41:53 +0000 | [diff] [blame] | 744 | Result = Ctx.typesAreCompatible(TCE->getArgType1(), TCE->getArgType2()); |
Steve Naroff | 389cecc | 2007-08-02 00:13:27 +0000 | [diff] [blame] | 745 | break; |
Steve Naroff | 7b658aa | 2007-08-02 04:09:23 +0000 | [diff] [blame] | 746 | } |
Steve Naroff | 13b7c5f | 2007-08-08 22:15:55 +0000 | [diff] [blame] | 747 | case CallExprClass: { |
| 748 | const CallExpr *CE = cast<CallExpr>(this); |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 749 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Steve Naroff | 13b7c5f | 2007-08-08 22:15:55 +0000 | [diff] [blame] | 750 | if (CE->isBuiltinClassifyType(Result)) |
| 751 | break; |
| 752 | if (Loc) *Loc = getLocStart(); |
| 753 | return false; |
| 754 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 755 | case DeclRefExprClass: |
| 756 | if (const EnumConstantDecl *D = |
| 757 | dyn_cast<EnumConstantDecl>(cast<DeclRefExpr>(this)->getDecl())) { |
| 758 | Result = D->getInitVal(); |
| 759 | break; |
| 760 | } |
| 761 | if (Loc) *Loc = getLocStart(); |
| 762 | return false; |
| 763 | case UnaryOperatorClass: { |
| 764 | const UnaryOperator *Exp = cast<UnaryOperator>(this); |
| 765 | |
| 766 | // Get the operand value. If this is sizeof/alignof, do not evalute the |
| 767 | // operand. This affects C99 6.6p3. |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 768 | if (!Exp->isSizeOfAlignOfOp() && !Exp->isOffsetOfOp() && |
Chris Lattner | 602dafd | 2007-08-23 21:42:50 +0000 | [diff] [blame] | 769 | !Exp->getSubExpr()->isIntegerConstantExpr(Result, Ctx, Loc,isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 770 | return false; |
| 771 | |
| 772 | switch (Exp->getOpcode()) { |
| 773 | // Address, indirect, pre/post inc/dec, etc are not valid constant exprs. |
| 774 | // See C99 6.6p3. |
| 775 | default: |
| 776 | if (Loc) *Loc = Exp->getOperatorLoc(); |
| 777 | return false; |
| 778 | case UnaryOperator::Extension: |
Chris Lattner | 76e773a | 2007-07-18 18:38:36 +0000 | [diff] [blame] | 779 | return true; // FIXME: this is wrong. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 780 | case UnaryOperator::SizeOf: |
| 781 | case UnaryOperator::AlignOf: |
Chris Lattner | a269ebf | 2008-02-21 05:45:29 +0000 | [diff] [blame] | 782 | // Return the result in the right width. |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 783 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Chris Lattner | a269ebf | 2008-02-21 05:45:29 +0000 | [diff] [blame] | 784 | |
| 785 | // sizeof(void) and __alignof__(void) = 1 as a gcc extension. |
| 786 | if (Exp->getSubExpr()->getType()->isVoidType()) { |
| 787 | Result = 1; |
| 788 | break; |
| 789 | } |
| 790 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 791 | // sizeof(vla) is not a constantexpr: C99 6.5.3.4p2. |
Eli Friedman | 3c2b317 | 2008-02-15 12:20:59 +0000 | [diff] [blame] | 792 | if (!Exp->getSubExpr()->getType()->isConstantSizeType()) { |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 793 | if (Loc) *Loc = Exp->getOperatorLoc(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 794 | return false; |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 795 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 796 | |
Chris Lattner | 76e773a | 2007-07-18 18:38:36 +0000 | [diff] [blame] | 797 | // Get information about the size or align. |
Chris Lattner | efdd157 | 2008-01-02 21:54:09 +0000 | [diff] [blame] | 798 | if (Exp->getSubExpr()->getType()->isFunctionType()) { |
| 799 | // GCC extension: sizeof(function) = 1. |
| 800 | Result = Exp->getOpcode() == UnaryOperator::AlignOf ? 4 : 1; |
Chris Lattner | da5a6b6 | 2007-11-27 18:22:04 +0000 | [diff] [blame] | 801 | } else { |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 802 | unsigned CharSize = Ctx.Target.getCharWidth(); |
Anders Carlsson | 64a31ef | 2008-02-18 07:10:45 +0000 | [diff] [blame] | 803 | if (Exp->getOpcode() == UnaryOperator::AlignOf) |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 804 | Result = Ctx.getTypeAlign(Exp->getSubExpr()->getType()) / CharSize; |
Anders Carlsson | 64a31ef | 2008-02-18 07:10:45 +0000 | [diff] [blame] | 805 | else |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 806 | Result = Ctx.getTypeSize(Exp->getSubExpr()->getType()) / CharSize; |
Chris Lattner | da5a6b6 | 2007-11-27 18:22:04 +0000 | [diff] [blame] | 807 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 808 | break; |
| 809 | case UnaryOperator::LNot: { |
Chris Lattner | bf75538 | 2008-01-25 19:16:19 +0000 | [diff] [blame] | 810 | bool Val = Result == 0; |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 811 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 812 | Result = Val; |
| 813 | break; |
| 814 | } |
| 815 | case UnaryOperator::Plus: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 816 | break; |
| 817 | case UnaryOperator::Minus: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 818 | Result = -Result; |
| 819 | break; |
| 820 | case UnaryOperator::Not: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 821 | Result = ~Result; |
| 822 | break; |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 823 | case UnaryOperator::OffsetOf: |
Daniel Dunbar | aa1f9f1 | 2008-08-28 18:42:20 +0000 | [diff] [blame] | 824 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 825 | Result = Exp->evaluateOffsetOf(Ctx); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 826 | } |
| 827 | break; |
| 828 | } |
| 829 | case SizeOfAlignOfTypeExprClass: { |
| 830 | const SizeOfAlignOfTypeExpr *Exp = cast<SizeOfAlignOfTypeExpr>(this); |
Chris Lattner | a269ebf | 2008-02-21 05:45:29 +0000 | [diff] [blame] | 831 | |
| 832 | // Return the result in the right width. |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 833 | Result.zextOrTrunc(static_cast<uint32_t>(Ctx.getTypeSize(getType()))); |
Chris Lattner | a269ebf | 2008-02-21 05:45:29 +0000 | [diff] [blame] | 834 | |
| 835 | // sizeof(void) and __alignof__(void) = 1 as a gcc extension. |
| 836 | if (Exp->getArgumentType()->isVoidType()) { |
| 837 | Result = 1; |
| 838 | break; |
| 839 | } |
| 840 | |
| 841 | // alignof always evaluates to a constant, sizeof does if arg is not VLA. |
Eli Friedman | 3c2b317 | 2008-02-15 12:20:59 +0000 | [diff] [blame] | 842 | if (Exp->isSizeOf() && !Exp->getArgumentType()->isConstantSizeType()) { |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 843 | if (Loc) *Loc = Exp->getOperatorLoc(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 844 | return false; |
Chris Lattner | 6538347 | 2007-12-18 07:15:40 +0000 | [diff] [blame] | 845 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 846 | |
Chris Lattner | 76e773a | 2007-07-18 18:38:36 +0000 | [diff] [blame] | 847 | // Get information about the size or align. |
Chris Lattner | efdd157 | 2008-01-02 21:54:09 +0000 | [diff] [blame] | 848 | if (Exp->getArgumentType()->isFunctionType()) { |
| 849 | // GCC extension: sizeof(function) = 1. |
| 850 | Result = Exp->isSizeOf() ? 1 : 4; |
Anders Carlsson | 6a24acb | 2008-02-16 01:20:23 +0000 | [diff] [blame] | 851 | } else { |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 852 | unsigned CharSize = Ctx.Target.getCharWidth(); |
Anders Carlsson | 6a24acb | 2008-02-16 01:20:23 +0000 | [diff] [blame] | 853 | if (Exp->isSizeOf()) |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 854 | Result = Ctx.getTypeSize(Exp->getArgumentType()) / CharSize; |
Anders Carlsson | 6a24acb | 2008-02-16 01:20:23 +0000 | [diff] [blame] | 855 | else |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 856 | Result = Ctx.getTypeAlign(Exp->getArgumentType()) / CharSize; |
Ted Kremenek | 060e470 | 2007-12-17 17:38:43 +0000 | [diff] [blame] | 857 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 858 | break; |
| 859 | } |
| 860 | case BinaryOperatorClass: { |
| 861 | const BinaryOperator *Exp = cast<BinaryOperator>(this); |
| 862 | |
| 863 | // The LHS of a constant expr is always evaluated and needed. |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 864 | if (!Exp->getLHS()->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 865 | return false; |
| 866 | |
| 867 | llvm::APSInt RHS(Result); |
| 868 | |
| 869 | // The short-circuiting &&/|| operators don't necessarily evaluate their |
| 870 | // RHS. Make sure to pass isEvaluated down correctly. |
| 871 | if (Exp->isLogicalOp()) { |
| 872 | bool RHSEval; |
| 873 | if (Exp->getOpcode() == BinaryOperator::LAnd) |
| 874 | RHSEval = Result != 0; |
| 875 | else { |
| 876 | assert(Exp->getOpcode() == BinaryOperator::LOr &&"Unexpected logical"); |
| 877 | RHSEval = Result == 0; |
| 878 | } |
| 879 | |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 880 | if (!Exp->getRHS()->isIntegerConstantExpr(RHS, Ctx, Loc, |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 881 | isEvaluated & RHSEval)) |
| 882 | return false; |
| 883 | } else { |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 884 | if (!Exp->getRHS()->isIntegerConstantExpr(RHS, Ctx, Loc, isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 885 | return false; |
| 886 | } |
| 887 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 888 | switch (Exp->getOpcode()) { |
| 889 | default: |
| 890 | if (Loc) *Loc = getLocStart(); |
| 891 | return false; |
| 892 | case BinaryOperator::Mul: |
| 893 | Result *= RHS; |
| 894 | break; |
| 895 | case BinaryOperator::Div: |
| 896 | if (RHS == 0) { |
| 897 | if (!isEvaluated) break; |
| 898 | if (Loc) *Loc = getLocStart(); |
| 899 | return false; |
| 900 | } |
| 901 | Result /= RHS; |
| 902 | break; |
| 903 | case BinaryOperator::Rem: |
| 904 | if (RHS == 0) { |
| 905 | if (!isEvaluated) break; |
| 906 | if (Loc) *Loc = getLocStart(); |
| 907 | return false; |
| 908 | } |
| 909 | Result %= RHS; |
| 910 | break; |
| 911 | case BinaryOperator::Add: Result += RHS; break; |
| 912 | case BinaryOperator::Sub: Result -= RHS; break; |
| 913 | case BinaryOperator::Shl: |
Chris Lattner | 701e5eb | 2007-09-04 02:45:27 +0000 | [diff] [blame] | 914 | Result <<= |
| 915 | static_cast<uint32_t>(RHS.getLimitedValue(Result.getBitWidth()-1)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 916 | break; |
| 917 | case BinaryOperator::Shr: |
Chris Lattner | 701e5eb | 2007-09-04 02:45:27 +0000 | [diff] [blame] | 918 | Result >>= |
| 919 | static_cast<uint32_t>(RHS.getLimitedValue(Result.getBitWidth()-1)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 920 | break; |
| 921 | case BinaryOperator::LT: Result = Result < RHS; break; |
| 922 | case BinaryOperator::GT: Result = Result > RHS; break; |
| 923 | case BinaryOperator::LE: Result = Result <= RHS; break; |
| 924 | case BinaryOperator::GE: Result = Result >= RHS; break; |
| 925 | case BinaryOperator::EQ: Result = Result == RHS; break; |
| 926 | case BinaryOperator::NE: Result = Result != RHS; break; |
| 927 | case BinaryOperator::And: Result &= RHS; break; |
| 928 | case BinaryOperator::Xor: Result ^= RHS; break; |
| 929 | case BinaryOperator::Or: Result |= RHS; break; |
| 930 | case BinaryOperator::LAnd: |
| 931 | Result = Result != 0 && RHS != 0; |
| 932 | break; |
| 933 | case BinaryOperator::LOr: |
| 934 | Result = Result != 0 || RHS != 0; |
| 935 | break; |
| 936 | |
| 937 | case BinaryOperator::Comma: |
| 938 | // C99 6.6p3: "shall not contain assignment, ..., or comma operators, |
| 939 | // *except* when they are contained within a subexpression that is not |
| 940 | // evaluated". Note that Assignment can never happen due to constraints |
| 941 | // on the LHS subexpr, so we don't need to check it here. |
| 942 | if (isEvaluated) { |
| 943 | if (Loc) *Loc = getLocStart(); |
| 944 | return false; |
| 945 | } |
| 946 | |
| 947 | // The result of the constant expr is the RHS. |
| 948 | Result = RHS; |
| 949 | return true; |
| 950 | } |
| 951 | |
| 952 | assert(!Exp->isAssignmentOp() && "LHS can't be a constant expr!"); |
| 953 | break; |
| 954 | } |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 955 | case ImplicitCastExprClass: |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 956 | case ExplicitCastExprClass: |
| 957 | case CXXFunctionalCastExprClass: { |
Argyrios Kyrtzidis | 0835a3c | 2008-08-18 23:01:59 +0000 | [diff] [blame] | 958 | const Expr *SubExpr = cast<CastExpr>(this)->getSubExpr(); |
| 959 | SourceLocation CastLoc = getLocStart(); |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 960 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 961 | // C99 6.6p6: shall only convert arithmetic types to integer types. |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 962 | if (!SubExpr->getType()->isArithmeticType() || |
| 963 | !getType()->isIntegerType()) { |
| 964 | if (Loc) *Loc = SubExpr->getLocStart(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 965 | return false; |
| 966 | } |
Chris Lattner | 987b15d | 2007-09-22 19:04:13 +0000 | [diff] [blame] | 967 | |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 968 | uint32_t DestWidth = static_cast<uint32_t>(Ctx.getTypeSize(getType())); |
Chris Lattner | 987b15d | 2007-09-22 19:04:13 +0000 | [diff] [blame] | 969 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 970 | // Handle simple integer->integer casts. |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 971 | if (SubExpr->getType()->isIntegerType()) { |
| 972 | if (!SubExpr->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 973 | return false; |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 974 | |
| 975 | // Figure out if this is a truncate, extend or noop cast. |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 976 | // If the input is signed, do a sign extend, noop, or truncate. |
Chris Lattner | c0a356b | 2008-01-09 18:59:34 +0000 | [diff] [blame] | 977 | if (getType()->isBooleanType()) { |
| 978 | // Conversion to bool compares against zero. |
| 979 | Result = Result != 0; |
| 980 | Result.zextOrTrunc(DestWidth); |
| 981 | } else if (SubExpr->getType()->isSignedIntegerType()) |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 982 | Result.sextOrTrunc(DestWidth); |
| 983 | else // If the input is unsigned, do a zero extend, noop, or truncate. |
| 984 | Result.zextOrTrunc(DestWidth); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 985 | break; |
| 986 | } |
| 987 | |
| 988 | // Allow floating constants that are the immediate operands of casts or that |
| 989 | // are parenthesized. |
Chris Lattner | 26dc7b3 | 2007-07-15 23:54:50 +0000 | [diff] [blame] | 990 | const Expr *Operand = SubExpr; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 991 | while (const ParenExpr *PE = dyn_cast<ParenExpr>(Operand)) |
| 992 | Operand = PE->getSubExpr(); |
Chris Lattner | 987b15d | 2007-09-22 19:04:13 +0000 | [diff] [blame] | 993 | |
| 994 | // If this isn't a floating literal, we can't handle it. |
| 995 | const FloatingLiteral *FL = dyn_cast<FloatingLiteral>(Operand); |
| 996 | if (!FL) { |
| 997 | if (Loc) *Loc = Operand->getLocStart(); |
| 998 | return false; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 999 | } |
Chris Lattner | c0a356b | 2008-01-09 18:59:34 +0000 | [diff] [blame] | 1000 | |
| 1001 | // If the destination is boolean, compare against zero. |
| 1002 | if (getType()->isBooleanType()) { |
| 1003 | Result = !FL->getValue().isZero(); |
| 1004 | Result.zextOrTrunc(DestWidth); |
| 1005 | break; |
| 1006 | } |
Chris Lattner | 987b15d | 2007-09-22 19:04:13 +0000 | [diff] [blame] | 1007 | |
| 1008 | // Determine whether we are converting to unsigned or signed. |
| 1009 | bool DestSigned = getType()->isSignedIntegerType(); |
Chris Lattner | ccc213f | 2007-09-26 00:47:26 +0000 | [diff] [blame] | 1010 | |
| 1011 | // TODO: Warn on overflow, but probably not here: isIntegerConstantExpr can |
| 1012 | // be called multiple times per AST. |
Chris Lattner | 987b15d | 2007-09-22 19:04:13 +0000 | [diff] [blame] | 1013 | uint64_t Space[4]; |
Chris Lattner | ccc213f | 2007-09-26 00:47:26 +0000 | [diff] [blame] | 1014 | (void)FL->getValue().convertToInteger(Space, DestWidth, DestSigned, |
| 1015 | llvm::APFloat::rmTowardZero); |
Chris Lattner | 987b15d | 2007-09-22 19:04:13 +0000 | [diff] [blame] | 1016 | Result = llvm::APInt(DestWidth, 4, Space); |
| 1017 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1018 | } |
| 1019 | case ConditionalOperatorClass: { |
| 1020 | const ConditionalOperator *Exp = cast<ConditionalOperator>(this); |
| 1021 | |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 1022 | if (!Exp->getCond()->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1023 | return false; |
| 1024 | |
| 1025 | const Expr *TrueExp = Exp->getLHS(); |
| 1026 | const Expr *FalseExp = Exp->getRHS(); |
| 1027 | if (Result == 0) std::swap(TrueExp, FalseExp); |
| 1028 | |
| 1029 | // Evaluate the false one first, discard the result. |
Anders Carlsson | 3907323 | 2007-11-30 19:04:31 +0000 | [diff] [blame] | 1030 | if (FalseExp && !FalseExp->isIntegerConstantExpr(Result, Ctx, Loc, false)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1031 | return false; |
| 1032 | // Evalute the true one, capture the result. |
Anders Carlsson | 3907323 | 2007-11-30 19:04:31 +0000 | [diff] [blame] | 1033 | if (TrueExp && |
| 1034 | !TrueExp->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1035 | return false; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1036 | break; |
| 1037 | } |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1038 | case CXXDefaultArgExprClass: |
| 1039 | return cast<CXXDefaultArgExpr>(this) |
| 1040 | ->isIntegerConstantExpr(Result, Ctx, Loc, isEvaluated); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1041 | } |
| 1042 | |
| 1043 | // Cases that are valid constant exprs fall through to here. |
| 1044 | Result.setIsUnsigned(getType()->isUnsignedIntegerType()); |
| 1045 | return true; |
| 1046 | } |
| 1047 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1048 | /// isNullPointerConstant - C99 6.3.2.3p3 - Return true if this is either an |
| 1049 | /// integer constant expression with the value zero, or if this is one that is |
| 1050 | /// cast to void*. |
Chris Lattner | 590b664 | 2007-07-15 23:26:56 +0000 | [diff] [blame] | 1051 | bool Expr::isNullPointerConstant(ASTContext &Ctx) const { |
Steve Naroff | aa58f00 | 2008-01-14 16:10:57 +0000 | [diff] [blame] | 1052 | // Strip off a cast to void*, if it exists. |
Argyrios Kyrtzidis | 0835a3c | 2008-08-18 23:01:59 +0000 | [diff] [blame] | 1053 | if (const ExplicitCastExpr *CE = dyn_cast<ExplicitCastExpr>(this)) { |
Steve Naroff | aa58f00 | 2008-01-14 16:10:57 +0000 | [diff] [blame] | 1054 | // Check that it is a cast to void*. |
Eli Friedman | 4b3f9b3 | 2008-02-13 17:29:58 +0000 | [diff] [blame] | 1055 | if (const PointerType *PT = CE->getType()->getAsPointerType()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1056 | QualType Pointee = PT->getPointeeType(); |
Chris Lattner | f46699c | 2008-02-20 20:55:12 +0000 | [diff] [blame] | 1057 | if (Pointee.getCVRQualifiers() == 0 && |
| 1058 | Pointee->isVoidType() && // to void* |
Steve Naroff | aa58f00 | 2008-01-14 16:10:57 +0000 | [diff] [blame] | 1059 | CE->getSubExpr()->getType()->isIntegerType()) // from int. |
| 1060 | return CE->getSubExpr()->isNullPointerConstant(Ctx); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1061 | } |
Steve Naroff | aa58f00 | 2008-01-14 16:10:57 +0000 | [diff] [blame] | 1062 | } else if (const ImplicitCastExpr *ICE = dyn_cast<ImplicitCastExpr>(this)) { |
| 1063 | // Ignore the ImplicitCastExpr type entirely. |
| 1064 | return ICE->getSubExpr()->isNullPointerConstant(Ctx); |
| 1065 | } else if (const ParenExpr *PE = dyn_cast<ParenExpr>(this)) { |
| 1066 | // Accept ((void*)0) as a null pointer constant, as many other |
| 1067 | // implementations do. |
| 1068 | return PE->getSubExpr()->isNullPointerConstant(Ctx); |
Chris Lattner | 8123a95 | 2008-04-10 02:22:51 +0000 | [diff] [blame] | 1069 | } else if (const CXXDefaultArgExpr *DefaultArg |
| 1070 | = dyn_cast<CXXDefaultArgExpr>(this)) { |
Chris Lattner | 0442108 | 2008-04-08 04:40:51 +0000 | [diff] [blame] | 1071 | // See through default argument expressions |
| 1072 | return DefaultArg->getExpr()->isNullPointerConstant(Ctx); |
Steve Naroff | aaffbf7 | 2008-01-14 02:53:34 +0000 | [diff] [blame] | 1073 | } |
Steve Naroff | aa58f00 | 2008-01-14 16:10:57 +0000 | [diff] [blame] | 1074 | |
| 1075 | // This expression must be an integer type. |
| 1076 | if (!getType()->isIntegerType()) |
| 1077 | return false; |
| 1078 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1079 | // If we have an integer constant expression, we need to *evaluate* it and |
| 1080 | // test for the value 0. |
| 1081 | llvm::APSInt Val(32); |
Steve Naroff | aa58f00 | 2008-01-14 16:10:57 +0000 | [diff] [blame] | 1082 | return isIntegerConstantExpr(Val, Ctx, 0, true) && Val == 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1083 | } |
Steve Naroff | 31a4584 | 2007-07-28 23:10:27 +0000 | [diff] [blame] | 1084 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 1085 | unsigned ExtVectorElementExpr::getNumElements() const { |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1086 | if (const VectorType *VT = getType()->getAsVectorType()) |
| 1087 | return VT->getNumElements(); |
| 1088 | return 1; |
Chris Lattner | 4d0ac88 | 2007-08-03 16:00:20 +0000 | [diff] [blame] | 1089 | } |
| 1090 | |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1091 | /// containsDuplicateElements - Return true if any element access is repeated. |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 1092 | bool ExtVectorElementExpr::containsDuplicateElements() const { |
Steve Naroff | fec0b49 | 2007-07-30 03:29:09 +0000 | [diff] [blame] | 1093 | const char *compStr = Accessor.getName(); |
| 1094 | unsigned length = strlen(compStr); |
| 1095 | |
| 1096 | for (unsigned i = 0; i < length-1; i++) { |
| 1097 | const char *s = compStr+i; |
| 1098 | for (const char c = *s++; *s; s++) |
| 1099 | if (c == *s) |
| 1100 | return true; |
| 1101 | } |
| 1102 | return false; |
| 1103 | } |
Chris Lattner | b8f849d | 2007-08-02 23:36:59 +0000 | [diff] [blame] | 1104 | |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1105 | /// getEncodedElementAccess - We encode the fields as a llvm ConstantArray. |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1106 | void ExtVectorElementExpr::getEncodedElementAccess( |
| 1107 | llvm::SmallVectorImpl<unsigned> &Elts) const { |
Chris Lattner | b8f849d | 2007-08-02 23:36:59 +0000 | [diff] [blame] | 1108 | const char *compStr = Accessor.getName(); |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1109 | |
| 1110 | bool isHi = !strcmp(compStr, "hi"); |
| 1111 | bool isLo = !strcmp(compStr, "lo"); |
| 1112 | bool isEven = !strcmp(compStr, "e"); |
| 1113 | bool isOdd = !strcmp(compStr, "o"); |
| 1114 | |
| 1115 | for (unsigned i = 0, e = getNumElements(); i != e; ++i) { |
| 1116 | uint64_t Index; |
| 1117 | |
| 1118 | if (isHi) |
| 1119 | Index = e + i; |
| 1120 | else if (isLo) |
| 1121 | Index = i; |
| 1122 | else if (isEven) |
| 1123 | Index = 2 * i; |
| 1124 | else if (isOdd) |
| 1125 | Index = 2 * i + 1; |
| 1126 | else |
| 1127 | Index = ExtVectorType::getAccessorIdx(compStr[i]); |
Chris Lattner | b8f849d | 2007-08-02 23:36:59 +0000 | [diff] [blame] | 1128 | |
Nate Begeman | 3b8d116 | 2008-05-13 21:03:02 +0000 | [diff] [blame] | 1129 | Elts.push_back(Index); |
Chris Lattner | b8f849d | 2007-08-02 23:36:59 +0000 | [diff] [blame] | 1130 | } |
Nate Begeman | 8a99764 | 2008-05-09 06:41:27 +0000 | [diff] [blame] | 1131 | } |
| 1132 | |
Steve Naroff | 68d331a | 2007-09-27 14:38:14 +0000 | [diff] [blame] | 1133 | // constructor for instance messages. |
Steve Naroff | bcfb06a | 2007-09-28 22:22:11 +0000 | [diff] [blame] | 1134 | ObjCMessageExpr::ObjCMessageExpr(Expr *receiver, Selector selInfo, |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 1135 | QualType retType, ObjCMethodDecl *mproto, |
Steve Naroff | db611d5 | 2007-11-03 16:37:59 +0000 | [diff] [blame] | 1136 | SourceLocation LBrac, SourceLocation RBrac, |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1137 | Expr **ArgExprs, unsigned nargs) |
Steve Naroff | db611d5 | 2007-11-03 16:37:59 +0000 | [diff] [blame] | 1138 | : Expr(ObjCMessageExprClass, retType), SelName(selInfo), |
Ted Kremenek | ea958e57 | 2008-05-01 17:26:20 +0000 | [diff] [blame] | 1139 | MethodProto(mproto) { |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1140 | NumArgs = nargs; |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1141 | SubExprs = new Stmt*[NumArgs+1]; |
Steve Naroff | 68d331a | 2007-09-27 14:38:14 +0000 | [diff] [blame] | 1142 | SubExprs[RECEIVER] = receiver; |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1143 | if (NumArgs) { |
| 1144 | for (unsigned i = 0; i != NumArgs; ++i) |
Steve Naroff | 68d331a | 2007-09-27 14:38:14 +0000 | [diff] [blame] | 1145 | SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); |
| 1146 | } |
Steve Naroff | 563477d | 2007-09-18 23:55:05 +0000 | [diff] [blame] | 1147 | LBracloc = LBrac; |
| 1148 | RBracloc = RBrac; |
| 1149 | } |
| 1150 | |
Steve Naroff | 68d331a | 2007-09-27 14:38:14 +0000 | [diff] [blame] | 1151 | // constructor for class messages. |
| 1152 | // FIXME: clsName should be typed to ObjCInterfaceType |
Steve Naroff | bcfb06a | 2007-09-28 22:22:11 +0000 | [diff] [blame] | 1153 | ObjCMessageExpr::ObjCMessageExpr(IdentifierInfo *clsName, Selector selInfo, |
Ted Kremenek | a526c5c | 2008-01-07 19:49:32 +0000 | [diff] [blame] | 1154 | QualType retType, ObjCMethodDecl *mproto, |
Steve Naroff | db611d5 | 2007-11-03 16:37:59 +0000 | [diff] [blame] | 1155 | SourceLocation LBrac, SourceLocation RBrac, |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1156 | Expr **ArgExprs, unsigned nargs) |
Steve Naroff | db611d5 | 2007-11-03 16:37:59 +0000 | [diff] [blame] | 1157 | : Expr(ObjCMessageExprClass, retType), SelName(selInfo), |
Ted Kremenek | ea958e57 | 2008-05-01 17:26:20 +0000 | [diff] [blame] | 1158 | MethodProto(mproto) { |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1159 | NumArgs = nargs; |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1160 | SubExprs = new Stmt*[NumArgs+1]; |
Ted Kremenek | 4df728e | 2008-06-24 15:50:53 +0000 | [diff] [blame] | 1161 | SubExprs[RECEIVER] = (Expr*) ((uintptr_t) clsName | IsClsMethDeclUnknown); |
Steve Naroff | 49f109c | 2007-11-15 13:05:42 +0000 | [diff] [blame] | 1162 | if (NumArgs) { |
| 1163 | for (unsigned i = 0; i != NumArgs; ++i) |
Steve Naroff | 68d331a | 2007-09-27 14:38:14 +0000 | [diff] [blame] | 1164 | SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); |
| 1165 | } |
Steve Naroff | 563477d | 2007-09-18 23:55:05 +0000 | [diff] [blame] | 1166 | LBracloc = LBrac; |
| 1167 | RBracloc = RBrac; |
| 1168 | } |
| 1169 | |
Ted Kremenek | 4df728e | 2008-06-24 15:50:53 +0000 | [diff] [blame] | 1170 | // constructor for class messages. |
| 1171 | ObjCMessageExpr::ObjCMessageExpr(ObjCInterfaceDecl *cls, Selector selInfo, |
| 1172 | QualType retType, ObjCMethodDecl *mproto, |
| 1173 | SourceLocation LBrac, SourceLocation RBrac, |
| 1174 | Expr **ArgExprs, unsigned nargs) |
| 1175 | : Expr(ObjCMessageExprClass, retType), SelName(selInfo), |
| 1176 | MethodProto(mproto) { |
| 1177 | NumArgs = nargs; |
| 1178 | SubExprs = new Stmt*[NumArgs+1]; |
| 1179 | SubExprs[RECEIVER] = (Expr*) ((uintptr_t) cls | IsClsMethDeclKnown); |
| 1180 | if (NumArgs) { |
| 1181 | for (unsigned i = 0; i != NumArgs; ++i) |
| 1182 | SubExprs[i+ARGS_START] = static_cast<Expr *>(ArgExprs[i]); |
| 1183 | } |
| 1184 | LBracloc = LBrac; |
| 1185 | RBracloc = RBrac; |
| 1186 | } |
| 1187 | |
| 1188 | ObjCMessageExpr::ClassInfo ObjCMessageExpr::getClassInfo() const { |
| 1189 | uintptr_t x = (uintptr_t) SubExprs[RECEIVER]; |
| 1190 | switch (x & Flags) { |
| 1191 | default: |
| 1192 | assert(false && "Invalid ObjCMessageExpr."); |
| 1193 | case IsInstMeth: |
| 1194 | return ClassInfo(0, 0); |
| 1195 | case IsClsMethDeclUnknown: |
| 1196 | return ClassInfo(0, (IdentifierInfo*) (x & ~Flags)); |
| 1197 | case IsClsMethDeclKnown: { |
| 1198 | ObjCInterfaceDecl* D = (ObjCInterfaceDecl*) (x & ~Flags); |
| 1199 | return ClassInfo(D, D->getIdentifier()); |
| 1200 | } |
| 1201 | } |
| 1202 | } |
| 1203 | |
Chris Lattner | 27437ca | 2007-10-25 00:29:32 +0000 | [diff] [blame] | 1204 | bool ChooseExpr::isConditionTrue(ASTContext &C) const { |
Daniel Dunbar | 32442bb | 2008-08-13 23:47:13 +0000 | [diff] [blame] | 1205 | return getCond()->getIntegerConstantExprValue(C) != 0; |
Chris Lattner | 27437ca | 2007-10-25 00:29:32 +0000 | [diff] [blame] | 1206 | } |
| 1207 | |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 1208 | static int64_t evaluateOffsetOf(ASTContext& C, const Expr *E) |
| 1209 | { |
| 1210 | if (const MemberExpr *ME = dyn_cast<MemberExpr>(E)) { |
| 1211 | QualType Ty = ME->getBase()->getType(); |
| 1212 | |
| 1213 | RecordDecl *RD = Ty->getAsRecordType()->getDecl(); |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 1214 | const ASTRecordLayout &RL = C.getASTRecordLayout(RD); |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 1215 | FieldDecl *FD = ME->getMemberDecl(); |
| 1216 | |
| 1217 | // FIXME: This is linear time. |
| 1218 | unsigned i = 0, e = 0; |
| 1219 | for (i = 0, e = RD->getNumMembers(); i != e; i++) { |
| 1220 | if (RD->getMember(i) == FD) |
| 1221 | break; |
| 1222 | } |
| 1223 | |
| 1224 | return RL.getFieldOffset(i) + evaluateOffsetOf(C, ME->getBase()); |
| 1225 | } else if (const ArraySubscriptExpr *ASE = dyn_cast<ArraySubscriptExpr>(E)) { |
| 1226 | const Expr *Base = ASE->getBase(); |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 1227 | |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 1228 | int64_t size = C.getTypeSize(ASE->getType()); |
Daniel Dunbar | 32442bb | 2008-08-13 23:47:13 +0000 | [diff] [blame] | 1229 | size *= ASE->getIdx()->getIntegerConstantExprValue(C).getSExtValue(); |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 1230 | |
| 1231 | return size + evaluateOffsetOf(C, Base); |
| 1232 | } else if (isa<CompoundLiteralExpr>(E)) |
| 1233 | return 0; |
| 1234 | |
| 1235 | assert(0 && "Unknown offsetof subexpression!"); |
| 1236 | return 0; |
| 1237 | } |
| 1238 | |
| 1239 | int64_t UnaryOperator::evaluateOffsetOf(ASTContext& C) const |
| 1240 | { |
| 1241 | assert(Opc == OffsetOf && "Unary operator not offsetof!"); |
| 1242 | |
Chris Lattner | 98be494 | 2008-03-05 18:54:05 +0000 | [diff] [blame] | 1243 | unsigned CharSize = C.Target.getCharWidth(); |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1244 | return ::evaluateOffsetOf(C, cast<Expr>(Val)) / CharSize; |
Anders Carlsson | 5a1deb8 | 2008-01-29 15:56:48 +0000 | [diff] [blame] | 1245 | } |
| 1246 | |
Daniel Dunbar | 9048891 | 2008-08-28 18:02:04 +0000 | [diff] [blame] | 1247 | void SizeOfAlignOfTypeExpr::Destroy(ASTContext& C) { |
| 1248 | // Override default behavior of traversing children. We do not want |
| 1249 | // to delete the type. |
| 1250 | } |
| 1251 | |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1252 | //===----------------------------------------------------------------------===// |
| 1253 | // Child Iterators for iterating over subexpressions/substatements |
| 1254 | //===----------------------------------------------------------------------===// |
| 1255 | |
| 1256 | // DeclRefExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1257 | Stmt::child_iterator DeclRefExpr::child_begin() { return child_iterator(); } |
| 1258 | Stmt::child_iterator DeclRefExpr::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1259 | |
Steve Naroff | 7779db4 | 2007-11-12 14:29:37 +0000 | [diff] [blame] | 1260 | // ObjCIvarRefExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1261 | Stmt::child_iterator ObjCIvarRefExpr::child_begin() { return &Base; } |
| 1262 | Stmt::child_iterator ObjCIvarRefExpr::child_end() { return &Base+1; } |
Steve Naroff | 7779db4 | 2007-11-12 14:29:37 +0000 | [diff] [blame] | 1263 | |
Steve Naroff | e3e9add | 2008-06-02 23:03:37 +0000 | [diff] [blame] | 1264 | // ObjCPropertyRefExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1265 | Stmt::child_iterator ObjCPropertyRefExpr::child_begin() { return &Base; } |
| 1266 | Stmt::child_iterator ObjCPropertyRefExpr::child_end() { return &Base+1; } |
Steve Naroff | ae78407 | 2008-05-30 00:40:33 +0000 | [diff] [blame] | 1267 | |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 1268 | // PredefinedExpr |
| 1269 | Stmt::child_iterator PredefinedExpr::child_begin() { return child_iterator(); } |
| 1270 | Stmt::child_iterator PredefinedExpr::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1271 | |
| 1272 | // IntegerLiteral |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1273 | Stmt::child_iterator IntegerLiteral::child_begin() { return child_iterator(); } |
| 1274 | Stmt::child_iterator IntegerLiteral::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1275 | |
| 1276 | // CharacterLiteral |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1277 | Stmt::child_iterator CharacterLiteral::child_begin() { return child_iterator(); } |
| 1278 | Stmt::child_iterator CharacterLiteral::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1279 | |
| 1280 | // FloatingLiteral |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1281 | Stmt::child_iterator FloatingLiteral::child_begin() { return child_iterator(); } |
| 1282 | Stmt::child_iterator FloatingLiteral::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1283 | |
Chris Lattner | 5d66145 | 2007-08-26 03:42:43 +0000 | [diff] [blame] | 1284 | // ImaginaryLiteral |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1285 | Stmt::child_iterator ImaginaryLiteral::child_begin() { return &Val; } |
| 1286 | Stmt::child_iterator ImaginaryLiteral::child_end() { return &Val+1; } |
Chris Lattner | 5d66145 | 2007-08-26 03:42:43 +0000 | [diff] [blame] | 1287 | |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1288 | // StringLiteral |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1289 | Stmt::child_iterator StringLiteral::child_begin() { return child_iterator(); } |
| 1290 | Stmt::child_iterator StringLiteral::child_end() { return child_iterator(); } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1291 | |
| 1292 | // ParenExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1293 | Stmt::child_iterator ParenExpr::child_begin() { return &Val; } |
| 1294 | Stmt::child_iterator ParenExpr::child_end() { return &Val+1; } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1295 | |
| 1296 | // UnaryOperator |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1297 | Stmt::child_iterator UnaryOperator::child_begin() { return &Val; } |
| 1298 | Stmt::child_iterator UnaryOperator::child_end() { return &Val+1; } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1299 | |
| 1300 | // SizeOfAlignOfTypeExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1301 | Stmt::child_iterator SizeOfAlignOfTypeExpr::child_begin() { |
Ted Kremenek | 699e9fb | 2007-12-14 22:52:23 +0000 | [diff] [blame] | 1302 | // If the type is a VLA type (and not a typedef), the size expression of the |
| 1303 | // VLA needs to be treated as an executable expression. |
| 1304 | if (VariableArrayType* T = dyn_cast<VariableArrayType>(Ty.getTypePtr())) |
| 1305 | return child_iterator(T); |
| 1306 | else |
| 1307 | return child_iterator(); |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1308 | } |
| 1309 | Stmt::child_iterator SizeOfAlignOfTypeExpr::child_end() { |
Ted Kremenek | 699e9fb | 2007-12-14 22:52:23 +0000 | [diff] [blame] | 1310 | return child_iterator(); |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1311 | } |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1312 | |
| 1313 | // ArraySubscriptExpr |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1314 | Stmt::child_iterator ArraySubscriptExpr::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1315 | return &SubExprs[0]; |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1316 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1317 | Stmt::child_iterator ArraySubscriptExpr::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1318 | return &SubExprs[0]+END_EXPR; |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1319 | } |
| 1320 | |
| 1321 | // CallExpr |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1322 | Stmt::child_iterator CallExpr::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1323 | return &SubExprs[0]; |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1324 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1325 | Stmt::child_iterator CallExpr::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1326 | return &SubExprs[0]+NumArgs+ARGS_START; |
Ted Kremenek | 77ed8e4 | 2007-08-24 18:13:47 +0000 | [diff] [blame] | 1327 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1328 | |
| 1329 | // MemberExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1330 | Stmt::child_iterator MemberExpr::child_begin() { return &Base; } |
| 1331 | Stmt::child_iterator MemberExpr::child_end() { return &Base+1; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1332 | |
Nate Begeman | 213541a | 2008-04-18 23:10:10 +0000 | [diff] [blame] | 1333 | // ExtVectorElementExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1334 | Stmt::child_iterator ExtVectorElementExpr::child_begin() { return &Base; } |
| 1335 | Stmt::child_iterator ExtVectorElementExpr::child_end() { return &Base+1; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1336 | |
| 1337 | // CompoundLiteralExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1338 | Stmt::child_iterator CompoundLiteralExpr::child_begin() { return &Init; } |
| 1339 | Stmt::child_iterator CompoundLiteralExpr::child_end() { return &Init+1; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1340 | |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1341 | // CastExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1342 | Stmt::child_iterator CastExpr::child_begin() { return &Op; } |
| 1343 | Stmt::child_iterator CastExpr::child_end() { return &Op+1; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1344 | |
| 1345 | // BinaryOperator |
| 1346 | Stmt::child_iterator BinaryOperator::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1347 | return &SubExprs[0]; |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1348 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1349 | Stmt::child_iterator BinaryOperator::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1350 | return &SubExprs[0]+END_EXPR; |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1351 | } |
| 1352 | |
| 1353 | // ConditionalOperator |
| 1354 | Stmt::child_iterator ConditionalOperator::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1355 | return &SubExprs[0]; |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1356 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1357 | Stmt::child_iterator ConditionalOperator::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1358 | return &SubExprs[0]+END_EXPR; |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1359 | } |
| 1360 | |
| 1361 | // AddrLabelExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1362 | Stmt::child_iterator AddrLabelExpr::child_begin() { return child_iterator(); } |
| 1363 | Stmt::child_iterator AddrLabelExpr::child_end() { return child_iterator(); } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1364 | |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1365 | // StmtExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1366 | Stmt::child_iterator StmtExpr::child_begin() { return &SubStmt; } |
| 1367 | Stmt::child_iterator StmtExpr::child_end() { return &SubStmt+1; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1368 | |
| 1369 | // TypesCompatibleExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1370 | Stmt::child_iterator TypesCompatibleExpr::child_begin() { |
| 1371 | return child_iterator(); |
| 1372 | } |
| 1373 | |
| 1374 | Stmt::child_iterator TypesCompatibleExpr::child_end() { |
| 1375 | return child_iterator(); |
| 1376 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1377 | |
| 1378 | // ChooseExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1379 | Stmt::child_iterator ChooseExpr::child_begin() { return &SubExprs[0]; } |
| 1380 | Stmt::child_iterator ChooseExpr::child_end() { return &SubExprs[0]+END_EXPR; } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1381 | |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 1382 | // OverloadExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1383 | Stmt::child_iterator OverloadExpr::child_begin() { return &SubExprs[0]; } |
| 1384 | Stmt::child_iterator OverloadExpr::child_end() { return &SubExprs[0]+NumExprs; } |
Nate Begeman | e2ce1d9 | 2008-01-17 17:46:27 +0000 | [diff] [blame] | 1385 | |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1386 | // ShuffleVectorExpr |
| 1387 | Stmt::child_iterator ShuffleVectorExpr::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1388 | return &SubExprs[0]; |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1389 | } |
| 1390 | Stmt::child_iterator ShuffleVectorExpr::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1391 | return &SubExprs[0]+NumExprs; |
Eli Friedman | d38617c | 2008-05-14 19:38:39 +0000 | [diff] [blame] | 1392 | } |
| 1393 | |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1394 | // VAArgExpr |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1395 | Stmt::child_iterator VAArgExpr::child_begin() { return &Val; } |
| 1396 | Stmt::child_iterator VAArgExpr::child_end() { return &Val+1; } |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1397 | |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 1398 | // InitListExpr |
| 1399 | Stmt::child_iterator InitListExpr::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1400 | return InitExprs.size() ? &InitExprs[0] : 0; |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 1401 | } |
| 1402 | Stmt::child_iterator InitListExpr::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1403 | return InitExprs.size() ? &InitExprs[0] + InitExprs.size() : 0; |
Anders Carlsson | 66b5a8a | 2007-08-31 04:56:16 +0000 | [diff] [blame] | 1404 | } |
| 1405 | |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1406 | // ObjCStringLiteral |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1407 | Stmt::child_iterator ObjCStringLiteral::child_begin() { |
| 1408 | return child_iterator(); |
| 1409 | } |
| 1410 | Stmt::child_iterator ObjCStringLiteral::child_end() { |
| 1411 | return child_iterator(); |
| 1412 | } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1413 | |
| 1414 | // ObjCEncodeExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1415 | Stmt::child_iterator ObjCEncodeExpr::child_begin() { return child_iterator(); } |
| 1416 | Stmt::child_iterator ObjCEncodeExpr::child_end() { return child_iterator(); } |
Ted Kremenek | 1237c67 | 2007-08-24 20:06:47 +0000 | [diff] [blame] | 1417 | |
Fariborz Jahanian | b62f681 | 2007-10-16 20:40:23 +0000 | [diff] [blame] | 1418 | // ObjCSelectorExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1419 | Stmt::child_iterator ObjCSelectorExpr::child_begin() { |
| 1420 | return child_iterator(); |
| 1421 | } |
| 1422 | Stmt::child_iterator ObjCSelectorExpr::child_end() { |
| 1423 | return child_iterator(); |
| 1424 | } |
Fariborz Jahanian | b62f681 | 2007-10-16 20:40:23 +0000 | [diff] [blame] | 1425 | |
Fariborz Jahanian | 390d50a | 2007-10-17 16:58:11 +0000 | [diff] [blame] | 1426 | // ObjCProtocolExpr |
Ted Kremenek | 9ac5928 | 2007-10-18 23:28:49 +0000 | [diff] [blame] | 1427 | Stmt::child_iterator ObjCProtocolExpr::child_begin() { |
| 1428 | return child_iterator(); |
| 1429 | } |
| 1430 | Stmt::child_iterator ObjCProtocolExpr::child_end() { |
| 1431 | return child_iterator(); |
| 1432 | } |
Fariborz Jahanian | 390d50a | 2007-10-17 16:58:11 +0000 | [diff] [blame] | 1433 | |
Steve Naroff | 563477d | 2007-09-18 23:55:05 +0000 | [diff] [blame] | 1434 | // ObjCMessageExpr |
Ted Kremenek | ea958e57 | 2008-05-01 17:26:20 +0000 | [diff] [blame] | 1435 | Stmt::child_iterator ObjCMessageExpr::child_begin() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1436 | return getReceiver() ? &SubExprs[0] : &SubExprs[0] + ARGS_START; |
Steve Naroff | 563477d | 2007-09-18 23:55:05 +0000 | [diff] [blame] | 1437 | } |
| 1438 | Stmt::child_iterator ObjCMessageExpr::child_end() { |
Ted Kremenek | 5549976 | 2008-06-17 02:43:46 +0000 | [diff] [blame] | 1439 | return &SubExprs[0]+ARGS_START+getNumArgs(); |
Steve Naroff | 563477d | 2007-09-18 23:55:05 +0000 | [diff] [blame] | 1440 | } |
| 1441 | |
Steve Naroff | 4eb206b | 2008-09-03 18:15:37 +0000 | [diff] [blame^] | 1442 | // Blocks |
| 1443 | Stmt::child_iterator BlockStmtExpr::child_begin() { |
| 1444 | return reinterpret_cast<Stmt**>(&Body); |
| 1445 | } |
| 1446 | Stmt::child_iterator BlockStmtExpr::child_end() { |
| 1447 | return reinterpret_cast<Stmt**>(&Body)+1; |
| 1448 | } |
| 1449 | |
| 1450 | Stmt::child_iterator BlockExprExpr::child_begin() { |
| 1451 | return reinterpret_cast<Stmt**>(&BodyExpr); |
| 1452 | } |
| 1453 | Stmt::child_iterator BlockExprExpr::child_end() { |
| 1454 | return reinterpret_cast<Stmt**>(&BodyExpr)+1; |
| 1455 | } |
| 1456 | |