Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1 | // Copyright 2010 the V8 project authors. All rights reserved. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_AST_H_ |
| 29 | #define V8_AST_H_ |
| 30 | |
| 31 | #include "execution.h" |
| 32 | #include "factory.h" |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 33 | #include "jsregexp.h" |
| 34 | #include "jump-target.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 35 | #include "runtime.h" |
| 36 | #include "token.h" |
| 37 | #include "variables.h" |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 38 | |
| 39 | namespace v8 { |
| 40 | namespace internal { |
| 41 | |
| 42 | // The abstract syntax tree is an intermediate, light-weight |
| 43 | // representation of the parsed JavaScript code suitable for |
| 44 | // compilation to native code. |
| 45 | |
| 46 | // Nodes are allocated in a separate zone, which allows faster |
| 47 | // allocation and constant-time deallocation of the entire syntax |
| 48 | // tree. |
| 49 | |
| 50 | |
| 51 | // ---------------------------------------------------------------------------- |
| 52 | // Nodes of the abstract syntax tree. Only concrete classes are |
| 53 | // enumerated here. |
| 54 | |
| 55 | #define STATEMENT_NODE_LIST(V) \ |
| 56 | V(Block) \ |
| 57 | V(ExpressionStatement) \ |
| 58 | V(EmptyStatement) \ |
| 59 | V(IfStatement) \ |
| 60 | V(ContinueStatement) \ |
| 61 | V(BreakStatement) \ |
| 62 | V(ReturnStatement) \ |
| 63 | V(WithEnterStatement) \ |
| 64 | V(WithExitStatement) \ |
| 65 | V(SwitchStatement) \ |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 66 | V(DoWhileStatement) \ |
| 67 | V(WhileStatement) \ |
| 68 | V(ForStatement) \ |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 69 | V(ForInStatement) \ |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 70 | V(TryCatchStatement) \ |
| 71 | V(TryFinallyStatement) \ |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 72 | V(DebuggerStatement) |
| 73 | |
| 74 | #define EXPRESSION_NODE_LIST(V) \ |
| 75 | V(FunctionLiteral) \ |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 76 | V(SharedFunctionInfoLiteral) \ |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 77 | V(Conditional) \ |
| 78 | V(Slot) \ |
| 79 | V(VariableProxy) \ |
| 80 | V(Literal) \ |
| 81 | V(RegExpLiteral) \ |
| 82 | V(ObjectLiteral) \ |
| 83 | V(ArrayLiteral) \ |
| 84 | V(CatchExtensionObject) \ |
| 85 | V(Assignment) \ |
| 86 | V(Throw) \ |
| 87 | V(Property) \ |
| 88 | V(Call) \ |
| 89 | V(CallNew) \ |
| 90 | V(CallRuntime) \ |
| 91 | V(UnaryOperation) \ |
| 92 | V(CountOperation) \ |
| 93 | V(BinaryOperation) \ |
| 94 | V(CompareOperation) \ |
| 95 | V(ThisFunction) |
| 96 | |
| 97 | #define AST_NODE_LIST(V) \ |
| 98 | V(Declaration) \ |
| 99 | STATEMENT_NODE_LIST(V) \ |
| 100 | EXPRESSION_NODE_LIST(V) |
| 101 | |
| 102 | // Forward declarations |
| 103 | class TargetCollector; |
| 104 | class MaterializedLiteral; |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 105 | class DefinitionInfo; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 106 | class BitVector; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 107 | |
| 108 | #define DEF_FORWARD_DECLARATION(type) class type; |
| 109 | AST_NODE_LIST(DEF_FORWARD_DECLARATION) |
| 110 | #undef DEF_FORWARD_DECLARATION |
| 111 | |
| 112 | |
| 113 | // Typedef only introduced to avoid unreadable code. |
| 114 | // Please do appreciate the required space in "> >". |
| 115 | typedef ZoneList<Handle<String> > ZoneStringList; |
| 116 | typedef ZoneList<Handle<Object> > ZoneObjectList; |
| 117 | |
| 118 | |
| 119 | class AstNode: public ZoneObject { |
| 120 | public: |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 121 | static const int kNoNumber = -1; |
| 122 | |
| 123 | AstNode() : num_(kNoNumber) {} |
| 124 | |
| 125 | explicit AstNode(AstNode* other); |
| 126 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 127 | virtual ~AstNode() { } |
| 128 | virtual void Accept(AstVisitor* v) = 0; |
| 129 | |
| 130 | // Type testing & conversion. |
| 131 | virtual Statement* AsStatement() { return NULL; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 132 | virtual Block* AsBlock() { return NULL; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 133 | virtual ExpressionStatement* AsExpressionStatement() { return NULL; } |
| 134 | virtual EmptyStatement* AsEmptyStatement() { return NULL; } |
| 135 | virtual Expression* AsExpression() { return NULL; } |
| 136 | virtual Literal* AsLiteral() { return NULL; } |
| 137 | virtual Slot* AsSlot() { return NULL; } |
| 138 | virtual VariableProxy* AsVariableProxy() { return NULL; } |
| 139 | virtual Property* AsProperty() { return NULL; } |
| 140 | virtual Call* AsCall() { return NULL; } |
| 141 | virtual TargetCollector* AsTargetCollector() { return NULL; } |
| 142 | virtual BreakableStatement* AsBreakableStatement() { return NULL; } |
| 143 | virtual IterationStatement* AsIterationStatement() { return NULL; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 144 | virtual ForStatement* AsForStatement() { return NULL; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 145 | virtual UnaryOperation* AsUnaryOperation() { return NULL; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 146 | virtual CountOperation* AsCountOperation() { return NULL; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 147 | virtual BinaryOperation* AsBinaryOperation() { return NULL; } |
| 148 | virtual Assignment* AsAssignment() { return NULL; } |
| 149 | virtual FunctionLiteral* AsFunctionLiteral() { return NULL; } |
| 150 | virtual MaterializedLiteral* AsMaterializedLiteral() { return NULL; } |
| 151 | virtual ObjectLiteral* AsObjectLiteral() { return NULL; } |
| 152 | virtual ArrayLiteral* AsArrayLiteral() { return NULL; } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 153 | virtual CompareOperation* AsCompareOperation() { return NULL; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 154 | |
| 155 | // True if the AST node is critical (its execution is needed or externally |
| 156 | // visible in some way). |
| 157 | virtual bool IsCritical() { |
| 158 | UNREACHABLE(); |
| 159 | return true; |
| 160 | } |
| 161 | |
| 162 | int num() { return num_; } |
| 163 | void set_num(int n) { num_ = n; } |
| 164 | |
| 165 | private: |
| 166 | // Support for ast node numbering. |
| 167 | int num_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 168 | }; |
| 169 | |
| 170 | |
| 171 | class Statement: public AstNode { |
| 172 | public: |
| 173 | Statement() : statement_pos_(RelocInfo::kNoPosition) {} |
| 174 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 175 | explicit Statement(Statement* other); |
| 176 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 177 | virtual Statement* AsStatement() { return this; } |
| 178 | virtual ReturnStatement* AsReturnStatement() { return NULL; } |
| 179 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 180 | virtual Assignment* StatementAsSimpleAssignment() { return NULL; } |
| 181 | virtual CountOperation* StatementAsCountOperation() { return NULL; } |
| 182 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 183 | bool IsEmpty() { return AsEmptyStatement() != NULL; } |
| 184 | |
| 185 | void set_statement_pos(int statement_pos) { statement_pos_ = statement_pos; } |
| 186 | int statement_pos() const { return statement_pos_; } |
| 187 | |
| 188 | private: |
| 189 | int statement_pos_; |
| 190 | }; |
| 191 | |
| 192 | |
| 193 | class Expression: public AstNode { |
| 194 | public: |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 195 | enum Context { |
| 196 | // Not assigned a context yet, or else will not be visited during |
| 197 | // code generation. |
| 198 | kUninitialized, |
| 199 | // Evaluated for its side effects. |
| 200 | kEffect, |
| 201 | // Evaluated for its value (and side effects). |
| 202 | kValue, |
| 203 | // Evaluated for control flow (and side effects). |
| 204 | kTest, |
| 205 | // Evaluated for control flow and side effects. Value is also |
| 206 | // needed if true. |
| 207 | kValueTest, |
| 208 | // Evaluated for control flow and side effects. Value is also |
| 209 | // needed if false. |
| 210 | kTestValue |
| 211 | }; |
| 212 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 213 | Expression() : bitfields_(0) {} |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 214 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 215 | explicit Expression(Expression* other); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 216 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 217 | virtual Expression* AsExpression() { return this; } |
| 218 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 219 | virtual bool IsValidLeftHandSide() { return false; } |
| 220 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 221 | virtual Variable* AssignedVariable() { return NULL; } |
| 222 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 223 | // Symbols that cannot be parsed as array indices are considered property |
| 224 | // names. We do not treat symbols that can be array indexes as property |
| 225 | // names because [] for string objects is handled only by keyed ICs. |
| 226 | virtual bool IsPropertyName() { return false; } |
| 227 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 228 | // True if the expression does not have (evaluated) subexpressions. |
| 229 | // Function literals are leaves because their subexpressions are not |
| 230 | // evaluated. |
| 231 | virtual bool IsLeaf() { return false; } |
| 232 | |
| 233 | // True if the expression has no side effects and is safe to |
| 234 | // evaluate out of order. |
| 235 | virtual bool IsTrivial() { return false; } |
| 236 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 237 | // True if the expression always has one of the non-Object JS types |
| 238 | // (Undefined, Null, Boolean, String, or Number). |
| 239 | virtual bool IsPrimitive() = 0; |
| 240 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 241 | // Mark the expression as being compiled as an expression |
| 242 | // statement. This is used to transform postfix increments to |
| 243 | // (faster) prefix increments. |
| 244 | virtual void MarkAsStatement() { /* do nothing */ } |
| 245 | |
| 246 | // Static type information for this expression. |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 247 | StaticType* type() { return &type_; } |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 248 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 249 | // True if the expression is a loop condition. |
| 250 | bool is_loop_condition() const { |
| 251 | return LoopConditionField::decode(bitfields_); |
| 252 | } |
| 253 | void set_is_loop_condition(bool flag) { |
| 254 | bitfields_ = (bitfields_ & ~LoopConditionField::mask()) | |
| 255 | LoopConditionField::encode(flag); |
| 256 | } |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 257 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 258 | // The value of the expression is guaranteed to be a smi, because the |
| 259 | // top operation is a bit operation with a mask, or a shift. |
| 260 | bool GuaranteedSmiResult(); |
Leon Clarke | 4515c47 | 2010-02-03 11:58:03 +0000 | [diff] [blame] | 261 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 262 | // AST analysis results |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 263 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 264 | // True if the expression rooted at this node can be compiled by the |
| 265 | // side-effect free compiler. |
| 266 | bool side_effect_free() { return SideEffectFreeField::decode(bitfields_); } |
| 267 | void set_side_effect_free(bool is_side_effect_free) { |
| 268 | bitfields_ &= ~SideEffectFreeField::mask(); |
| 269 | bitfields_ |= SideEffectFreeField::encode(is_side_effect_free); |
| 270 | } |
| 271 | |
| 272 | // Will the use of this expression treat -0 the same as 0 in all cases? |
| 273 | // If so, we can return 0 instead of -0 if we want to, to optimize code. |
| 274 | bool no_negative_zero() { return NoNegativeZeroField::decode(bitfields_); } |
| 275 | void set_no_negative_zero(bool no_negative_zero) { |
| 276 | bitfields_ &= ~NoNegativeZeroField::mask(); |
| 277 | bitfields_ |= NoNegativeZeroField::encode(no_negative_zero); |
| 278 | } |
| 279 | |
| 280 | // Will ToInt32 (ECMA 262-3 9.5) or ToUint32 (ECMA 262-3 9.6) |
| 281 | // be applied to the value of this expression? |
| 282 | // If so, we may be able to optimize the calculation of the value. |
| 283 | bool to_int32() { return ToInt32Field::decode(bitfields_); } |
| 284 | void set_to_int32(bool to_int32) { |
| 285 | bitfields_ &= ~ToInt32Field::mask(); |
| 286 | bitfields_ |= ToInt32Field::encode(to_int32); |
| 287 | } |
| 288 | |
| 289 | // How many bitwise logical or shift operators are used in this expression? |
| 290 | int num_bit_ops() { return NumBitOpsField::decode(bitfields_); } |
| 291 | void set_num_bit_ops(int num_bit_ops) { |
| 292 | bitfields_ &= ~NumBitOpsField::mask(); |
| 293 | num_bit_ops = Min(num_bit_ops, kMaxNumBitOps); |
| 294 | bitfields_ |= NumBitOpsField::encode(num_bit_ops); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 295 | } |
| 296 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 297 | private: |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 298 | static const int kMaxNumBitOps = (1 << 5) - 1; |
| 299 | |
| 300 | uint32_t bitfields_; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 301 | StaticType type_; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 302 | |
| 303 | // Using template BitField<type, start, size>. |
| 304 | class SideEffectFreeField : public BitField<bool, 0, 1> {}; |
| 305 | class NoNegativeZeroField : public BitField<bool, 1, 1> {}; |
| 306 | class ToInt32Field : public BitField<bool, 2, 1> {}; |
| 307 | class NumBitOpsField : public BitField<int, 3, 5> {}; |
| 308 | class LoopConditionField: public BitField<bool, 8, 1> {}; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 309 | }; |
| 310 | |
| 311 | |
| 312 | /** |
| 313 | * A sentinel used during pre parsing that represents some expression |
| 314 | * that is a valid left hand side without having to actually build |
| 315 | * the expression. |
| 316 | */ |
| 317 | class ValidLeftHandSideSentinel: public Expression { |
| 318 | public: |
| 319 | virtual bool IsValidLeftHandSide() { return true; } |
| 320 | virtual void Accept(AstVisitor* v) { UNREACHABLE(); } |
| 321 | static ValidLeftHandSideSentinel* instance() { return &instance_; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 322 | |
| 323 | virtual bool IsPrimitive() { |
| 324 | UNREACHABLE(); |
| 325 | return false; |
| 326 | } |
| 327 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 328 | private: |
| 329 | static ValidLeftHandSideSentinel instance_; |
| 330 | }; |
| 331 | |
| 332 | |
| 333 | class BreakableStatement: public Statement { |
| 334 | public: |
| 335 | enum Type { |
| 336 | TARGET_FOR_ANONYMOUS, |
| 337 | TARGET_FOR_NAMED_ONLY |
| 338 | }; |
| 339 | |
| 340 | // The labels associated with this statement. May be NULL; |
| 341 | // if it is != NULL, guaranteed to contain at least one entry. |
| 342 | ZoneStringList* labels() const { return labels_; } |
| 343 | |
| 344 | // Type testing & conversion. |
| 345 | virtual BreakableStatement* AsBreakableStatement() { return this; } |
| 346 | |
| 347 | // Code generation |
| 348 | BreakTarget* break_target() { return &break_target_; } |
| 349 | |
| 350 | // Testers. |
| 351 | bool is_target_for_anonymous() const { return type_ == TARGET_FOR_ANONYMOUS; } |
| 352 | |
| 353 | protected: |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame^] | 354 | inline BreakableStatement(ZoneStringList* labels, Type type); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 355 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 356 | explicit BreakableStatement(BreakableStatement* other); |
| 357 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 358 | private: |
| 359 | ZoneStringList* labels_; |
| 360 | Type type_; |
| 361 | BreakTarget break_target_; |
| 362 | }; |
| 363 | |
| 364 | |
| 365 | class Block: public BreakableStatement { |
| 366 | public: |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame^] | 367 | inline Block(ZoneStringList* labels, int capacity, bool is_initializer_block); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 368 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 369 | // Construct a clone initialized from the original block and |
| 370 | // a deep copy of all statements of the original block. |
| 371 | Block(Block* other, ZoneList<Statement*>* statements); |
| 372 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 373 | virtual void Accept(AstVisitor* v); |
| 374 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 375 | virtual Block* AsBlock() { return this; } |
| 376 | |
| 377 | virtual Assignment* StatementAsSimpleAssignment() { |
| 378 | if (statements_.length() != 1) return NULL; |
| 379 | return statements_[0]->StatementAsSimpleAssignment(); |
| 380 | } |
| 381 | |
| 382 | virtual CountOperation* StatementAsCountOperation() { |
| 383 | if (statements_.length() != 1) return NULL; |
| 384 | return statements_[0]->StatementAsCountOperation(); |
| 385 | } |
| 386 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 387 | void AddStatement(Statement* statement) { statements_.Add(statement); } |
| 388 | |
| 389 | ZoneList<Statement*>* statements() { return &statements_; } |
| 390 | bool is_initializer_block() const { return is_initializer_block_; } |
| 391 | |
| 392 | private: |
| 393 | ZoneList<Statement*> statements_; |
| 394 | bool is_initializer_block_; |
| 395 | }; |
| 396 | |
| 397 | |
| 398 | class Declaration: public AstNode { |
| 399 | public: |
| 400 | Declaration(VariableProxy* proxy, Variable::Mode mode, FunctionLiteral* fun) |
| 401 | : proxy_(proxy), |
| 402 | mode_(mode), |
| 403 | fun_(fun) { |
| 404 | ASSERT(mode == Variable::VAR || mode == Variable::CONST); |
| 405 | // At the moment there are no "const functions"'s in JavaScript... |
| 406 | ASSERT(fun == NULL || mode == Variable::VAR); |
| 407 | } |
| 408 | |
| 409 | virtual void Accept(AstVisitor* v); |
| 410 | |
| 411 | VariableProxy* proxy() const { return proxy_; } |
| 412 | Variable::Mode mode() const { return mode_; } |
| 413 | FunctionLiteral* fun() const { return fun_; } // may be NULL |
| 414 | |
| 415 | private: |
| 416 | VariableProxy* proxy_; |
| 417 | Variable::Mode mode_; |
| 418 | FunctionLiteral* fun_; |
| 419 | }; |
| 420 | |
| 421 | |
| 422 | class IterationStatement: public BreakableStatement { |
| 423 | public: |
| 424 | // Type testing & conversion. |
| 425 | virtual IterationStatement* AsIterationStatement() { return this; } |
| 426 | |
| 427 | Statement* body() const { return body_; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 428 | void set_body(Statement* stmt) { body_ = stmt; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 429 | |
| 430 | // Code generation |
| 431 | BreakTarget* continue_target() { return &continue_target_; } |
| 432 | |
| 433 | protected: |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame^] | 434 | explicit inline IterationStatement(ZoneStringList* labels); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 435 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 436 | // Construct a clone initialized from original and |
| 437 | // a deep copy of the original body. |
| 438 | IterationStatement(IterationStatement* other, Statement* body); |
| 439 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 440 | void Initialize(Statement* body) { |
| 441 | body_ = body; |
| 442 | } |
| 443 | |
| 444 | private: |
| 445 | Statement* body_; |
| 446 | BreakTarget continue_target_; |
| 447 | }; |
| 448 | |
| 449 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 450 | class DoWhileStatement: public IterationStatement { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 451 | public: |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame^] | 452 | explicit inline DoWhileStatement(ZoneStringList* labels); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 453 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 454 | void Initialize(Expression* cond, Statement* body) { |
| 455 | IterationStatement::Initialize(body); |
| 456 | cond_ = cond; |
| 457 | } |
| 458 | |
| 459 | virtual void Accept(AstVisitor* v); |
| 460 | |
| 461 | Expression* cond() const { return cond_; } |
| 462 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 463 | // Position where condition expression starts. We need it to make |
| 464 | // the loop's condition a breakable location. |
| 465 | int condition_position() { return condition_position_; } |
| 466 | void set_condition_position(int pos) { condition_position_ = pos; } |
| 467 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 468 | private: |
| 469 | Expression* cond_; |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 470 | int condition_position_; |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 471 | }; |
| 472 | |
| 473 | |
| 474 | class WhileStatement: public IterationStatement { |
| 475 | public: |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame^] | 476 | explicit WhileStatement(ZoneStringList* labels); |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 477 | |
| 478 | void Initialize(Expression* cond, Statement* body) { |
| 479 | IterationStatement::Initialize(body); |
| 480 | cond_ = cond; |
| 481 | } |
| 482 | |
| 483 | virtual void Accept(AstVisitor* v); |
| 484 | |
| 485 | Expression* cond() const { return cond_; } |
| 486 | bool may_have_function_literal() const { |
| 487 | return may_have_function_literal_; |
| 488 | } |
| 489 | |
| 490 | private: |
| 491 | Expression* cond_; |
| 492 | // True if there is a function literal subexpression in the condition. |
| 493 | bool may_have_function_literal_; |
| 494 | |
| 495 | friend class AstOptimizer; |
| 496 | }; |
| 497 | |
| 498 | |
| 499 | class ForStatement: public IterationStatement { |
| 500 | public: |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame^] | 501 | explicit inline ForStatement(ZoneStringList* labels); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 502 | |
| 503 | // Construct a for-statement initialized from another for-statement |
| 504 | // and deep copies of all parts of the original statement. |
| 505 | ForStatement(ForStatement* other, |
| 506 | Statement* init, |
| 507 | Expression* cond, |
| 508 | Statement* next, |
| 509 | Statement* body); |
| 510 | |
| 511 | virtual ForStatement* AsForStatement() { return this; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 512 | |
| 513 | void Initialize(Statement* init, |
| 514 | Expression* cond, |
| 515 | Statement* next, |
| 516 | Statement* body) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 517 | IterationStatement::Initialize(body); |
| 518 | init_ = init; |
| 519 | cond_ = cond; |
| 520 | next_ = next; |
| 521 | } |
| 522 | |
| 523 | virtual void Accept(AstVisitor* v); |
| 524 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 525 | Statement* init() const { return init_; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 526 | void set_init(Statement* stmt) { init_ = stmt; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 527 | Expression* cond() const { return cond_; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 528 | void set_cond(Expression* expr) { cond_ = expr; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 529 | Statement* next() const { return next_; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 530 | void set_next(Statement* stmt) { next_ = stmt; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 531 | bool may_have_function_literal() const { |
| 532 | return may_have_function_literal_; |
| 533 | } |
| 534 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 535 | bool is_fast_smi_loop() { return loop_variable_ != NULL; } |
| 536 | Variable* loop_variable() { return loop_variable_; } |
| 537 | void set_loop_variable(Variable* var) { loop_variable_ = var; } |
| 538 | |
| 539 | bool peel_this_loop() { return peel_this_loop_; } |
| 540 | void set_peel_this_loop(bool b) { peel_this_loop_ = b; } |
| 541 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 542 | private: |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 543 | Statement* init_; |
| 544 | Expression* cond_; |
| 545 | Statement* next_; |
| 546 | // True if there is a function literal subexpression in the condition. |
| 547 | bool may_have_function_literal_; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 548 | Variable* loop_variable_; |
| 549 | bool peel_this_loop_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 550 | |
| 551 | friend class AstOptimizer; |
| 552 | }; |
| 553 | |
| 554 | |
| 555 | class ForInStatement: public IterationStatement { |
| 556 | public: |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame^] | 557 | explicit inline ForInStatement(ZoneStringList* labels); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 558 | |
| 559 | void Initialize(Expression* each, Expression* enumerable, Statement* body) { |
| 560 | IterationStatement::Initialize(body); |
| 561 | each_ = each; |
| 562 | enumerable_ = enumerable; |
| 563 | } |
| 564 | |
| 565 | virtual void Accept(AstVisitor* v); |
| 566 | |
| 567 | Expression* each() const { return each_; } |
| 568 | Expression* enumerable() const { return enumerable_; } |
| 569 | |
| 570 | private: |
| 571 | Expression* each_; |
| 572 | Expression* enumerable_; |
| 573 | }; |
| 574 | |
| 575 | |
| 576 | class ExpressionStatement: public Statement { |
| 577 | public: |
| 578 | explicit ExpressionStatement(Expression* expression) |
| 579 | : expression_(expression) { } |
| 580 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 581 | // Construct an expression statement initialized from another |
| 582 | // expression statement and a deep copy of the original expression. |
| 583 | ExpressionStatement(ExpressionStatement* other, Expression* expression); |
| 584 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 585 | virtual void Accept(AstVisitor* v); |
| 586 | |
| 587 | // Type testing & conversion. |
| 588 | virtual ExpressionStatement* AsExpressionStatement() { return this; } |
| 589 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 590 | virtual Assignment* StatementAsSimpleAssignment(); |
| 591 | virtual CountOperation* StatementAsCountOperation(); |
| 592 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 593 | void set_expression(Expression* e) { expression_ = e; } |
| 594 | Expression* expression() { return expression_; } |
| 595 | |
| 596 | private: |
| 597 | Expression* expression_; |
| 598 | }; |
| 599 | |
| 600 | |
| 601 | class ContinueStatement: public Statement { |
| 602 | public: |
| 603 | explicit ContinueStatement(IterationStatement* target) |
| 604 | : target_(target) { } |
| 605 | |
| 606 | virtual void Accept(AstVisitor* v); |
| 607 | |
| 608 | IterationStatement* target() const { return target_; } |
| 609 | |
| 610 | private: |
| 611 | IterationStatement* target_; |
| 612 | }; |
| 613 | |
| 614 | |
| 615 | class BreakStatement: public Statement { |
| 616 | public: |
| 617 | explicit BreakStatement(BreakableStatement* target) |
| 618 | : target_(target) { } |
| 619 | |
| 620 | virtual void Accept(AstVisitor* v); |
| 621 | |
| 622 | BreakableStatement* target() const { return target_; } |
| 623 | |
| 624 | private: |
| 625 | BreakableStatement* target_; |
| 626 | }; |
| 627 | |
| 628 | |
| 629 | class ReturnStatement: public Statement { |
| 630 | public: |
| 631 | explicit ReturnStatement(Expression* expression) |
| 632 | : expression_(expression) { } |
| 633 | |
| 634 | virtual void Accept(AstVisitor* v); |
| 635 | |
| 636 | // Type testing & conversion. |
| 637 | virtual ReturnStatement* AsReturnStatement() { return this; } |
| 638 | |
| 639 | Expression* expression() { return expression_; } |
| 640 | |
| 641 | private: |
| 642 | Expression* expression_; |
| 643 | }; |
| 644 | |
| 645 | |
| 646 | class WithEnterStatement: public Statement { |
| 647 | public: |
| 648 | explicit WithEnterStatement(Expression* expression, bool is_catch_block) |
| 649 | : expression_(expression), is_catch_block_(is_catch_block) { } |
| 650 | |
| 651 | virtual void Accept(AstVisitor* v); |
| 652 | |
| 653 | Expression* expression() const { return expression_; } |
| 654 | |
| 655 | bool is_catch_block() const { return is_catch_block_; } |
| 656 | |
| 657 | private: |
| 658 | Expression* expression_; |
| 659 | bool is_catch_block_; |
| 660 | }; |
| 661 | |
| 662 | |
| 663 | class WithExitStatement: public Statement { |
| 664 | public: |
| 665 | WithExitStatement() { } |
| 666 | |
| 667 | virtual void Accept(AstVisitor* v); |
| 668 | }; |
| 669 | |
| 670 | |
| 671 | class CaseClause: public ZoneObject { |
| 672 | public: |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame^] | 673 | CaseClause(Expression* label, ZoneList<Statement*>* statements); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 674 | |
| 675 | bool is_default() const { return label_ == NULL; } |
| 676 | Expression* label() const { |
| 677 | CHECK(!is_default()); |
| 678 | return label_; |
| 679 | } |
| 680 | JumpTarget* body_target() { return &body_target_; } |
| 681 | ZoneList<Statement*>* statements() const { return statements_; } |
| 682 | |
| 683 | private: |
| 684 | Expression* label_; |
| 685 | JumpTarget body_target_; |
| 686 | ZoneList<Statement*>* statements_; |
| 687 | }; |
| 688 | |
| 689 | |
| 690 | class SwitchStatement: public BreakableStatement { |
| 691 | public: |
Kristian Monsen | 25f6136 | 2010-05-21 11:50:48 +0100 | [diff] [blame^] | 692 | explicit inline SwitchStatement(ZoneStringList* labels); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 693 | |
| 694 | void Initialize(Expression* tag, ZoneList<CaseClause*>* cases) { |
| 695 | tag_ = tag; |
| 696 | cases_ = cases; |
| 697 | } |
| 698 | |
| 699 | virtual void Accept(AstVisitor* v); |
| 700 | |
| 701 | Expression* tag() const { return tag_; } |
| 702 | ZoneList<CaseClause*>* cases() const { return cases_; } |
| 703 | |
| 704 | private: |
| 705 | Expression* tag_; |
| 706 | ZoneList<CaseClause*>* cases_; |
| 707 | }; |
| 708 | |
| 709 | |
| 710 | // If-statements always have non-null references to their then- and |
| 711 | // else-parts. When parsing if-statements with no explicit else-part, |
| 712 | // the parser implicitly creates an empty statement. Use the |
| 713 | // HasThenStatement() and HasElseStatement() functions to check if a |
| 714 | // given if-statement has a then- or an else-part containing code. |
| 715 | class IfStatement: public Statement { |
| 716 | public: |
| 717 | IfStatement(Expression* condition, |
| 718 | Statement* then_statement, |
| 719 | Statement* else_statement) |
| 720 | : condition_(condition), |
| 721 | then_statement_(then_statement), |
| 722 | else_statement_(else_statement) { } |
| 723 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 724 | // Construct an if-statement initialized from another if-statement |
| 725 | // and deep copies of all parts of the original. |
| 726 | IfStatement(IfStatement* other, |
| 727 | Expression* condition, |
| 728 | Statement* then_statement, |
| 729 | Statement* else_statement); |
| 730 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 731 | virtual void Accept(AstVisitor* v); |
| 732 | |
| 733 | bool HasThenStatement() const { return !then_statement()->IsEmpty(); } |
| 734 | bool HasElseStatement() const { return !else_statement()->IsEmpty(); } |
| 735 | |
| 736 | Expression* condition() const { return condition_; } |
| 737 | Statement* then_statement() const { return then_statement_; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 738 | void set_then_statement(Statement* stmt) { then_statement_ = stmt; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 739 | Statement* else_statement() const { return else_statement_; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 740 | void set_else_statement(Statement* stmt) { else_statement_ = stmt; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 741 | |
| 742 | private: |
| 743 | Expression* condition_; |
| 744 | Statement* then_statement_; |
| 745 | Statement* else_statement_; |
| 746 | }; |
| 747 | |
| 748 | |
| 749 | // NOTE: TargetCollectors are represented as nodes to fit in the target |
| 750 | // stack in the compiler; this should probably be reworked. |
| 751 | class TargetCollector: public AstNode { |
| 752 | public: |
| 753 | explicit TargetCollector(ZoneList<BreakTarget*>* targets) |
| 754 | : targets_(targets) { |
| 755 | } |
| 756 | |
| 757 | // Adds a jump target to the collector. The collector stores a pointer not |
| 758 | // a copy of the target to make binding work, so make sure not to pass in |
| 759 | // references to something on the stack. |
| 760 | void AddTarget(BreakTarget* target); |
| 761 | |
| 762 | // Virtual behaviour. TargetCollectors are never part of the AST. |
| 763 | virtual void Accept(AstVisitor* v) { UNREACHABLE(); } |
| 764 | virtual TargetCollector* AsTargetCollector() { return this; } |
| 765 | |
| 766 | ZoneList<BreakTarget*>* targets() { return targets_; } |
| 767 | |
| 768 | private: |
| 769 | ZoneList<BreakTarget*>* targets_; |
| 770 | }; |
| 771 | |
| 772 | |
| 773 | class TryStatement: public Statement { |
| 774 | public: |
| 775 | explicit TryStatement(Block* try_block) |
| 776 | : try_block_(try_block), escaping_targets_(NULL) { } |
| 777 | |
| 778 | void set_escaping_targets(ZoneList<BreakTarget*>* targets) { |
| 779 | escaping_targets_ = targets; |
| 780 | } |
| 781 | |
| 782 | Block* try_block() const { return try_block_; } |
| 783 | ZoneList<BreakTarget*>* escaping_targets() const { return escaping_targets_; } |
| 784 | |
| 785 | private: |
| 786 | Block* try_block_; |
| 787 | ZoneList<BreakTarget*>* escaping_targets_; |
| 788 | }; |
| 789 | |
| 790 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 791 | class TryCatchStatement: public TryStatement { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 792 | public: |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 793 | TryCatchStatement(Block* try_block, |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 794 | VariableProxy* catch_var, |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 795 | Block* catch_block) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 796 | : TryStatement(try_block), |
| 797 | catch_var_(catch_var), |
| 798 | catch_block_(catch_block) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 799 | } |
| 800 | |
| 801 | virtual void Accept(AstVisitor* v); |
| 802 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 803 | VariableProxy* catch_var() const { return catch_var_; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 804 | Block* catch_block() const { return catch_block_; } |
| 805 | |
| 806 | private: |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 807 | VariableProxy* catch_var_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 808 | Block* catch_block_; |
| 809 | }; |
| 810 | |
| 811 | |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 812 | class TryFinallyStatement: public TryStatement { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 813 | public: |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 814 | TryFinallyStatement(Block* try_block, Block* finally_block) |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 815 | : TryStatement(try_block), |
| 816 | finally_block_(finally_block) { } |
| 817 | |
| 818 | virtual void Accept(AstVisitor* v); |
| 819 | |
| 820 | Block* finally_block() const { return finally_block_; } |
| 821 | |
| 822 | private: |
| 823 | Block* finally_block_; |
| 824 | }; |
| 825 | |
| 826 | |
| 827 | class DebuggerStatement: public Statement { |
| 828 | public: |
| 829 | virtual void Accept(AstVisitor* v); |
| 830 | }; |
| 831 | |
| 832 | |
| 833 | class EmptyStatement: public Statement { |
| 834 | public: |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 835 | EmptyStatement() {} |
| 836 | |
| 837 | explicit EmptyStatement(EmptyStatement* other); |
| 838 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 839 | virtual void Accept(AstVisitor* v); |
| 840 | |
| 841 | // Type testing & conversion. |
| 842 | virtual EmptyStatement* AsEmptyStatement() { return this; } |
| 843 | }; |
| 844 | |
| 845 | |
| 846 | class Literal: public Expression { |
| 847 | public: |
| 848 | explicit Literal(Handle<Object> handle) : handle_(handle) { } |
| 849 | |
| 850 | virtual void Accept(AstVisitor* v); |
| 851 | |
| 852 | // Type testing & conversion. |
| 853 | virtual Literal* AsLiteral() { return this; } |
| 854 | |
| 855 | // Check if this literal is identical to the other literal. |
| 856 | bool IsIdenticalTo(const Literal* other) const { |
| 857 | return handle_.is_identical_to(other->handle_); |
| 858 | } |
| 859 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 860 | virtual bool IsPropertyName() { |
| 861 | if (handle_->IsSymbol()) { |
| 862 | uint32_t ignored; |
| 863 | return !String::cast(*handle_)->AsArrayIndex(&ignored); |
| 864 | } |
| 865 | return false; |
| 866 | } |
| 867 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 868 | virtual bool IsLeaf() { return true; } |
| 869 | virtual bool IsTrivial() { return true; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 870 | virtual bool IsPrimitive(); |
| 871 | virtual bool IsCritical(); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 872 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 873 | // Identity testers. |
| 874 | bool IsNull() const { return handle_.is_identical_to(Factory::null_value()); } |
| 875 | bool IsTrue() const { return handle_.is_identical_to(Factory::true_value()); } |
| 876 | bool IsFalse() const { |
| 877 | return handle_.is_identical_to(Factory::false_value()); |
| 878 | } |
| 879 | |
| 880 | Handle<Object> handle() const { return handle_; } |
| 881 | |
| 882 | private: |
| 883 | Handle<Object> handle_; |
| 884 | }; |
| 885 | |
| 886 | |
| 887 | // Base class for literals that needs space in the corresponding JSFunction. |
| 888 | class MaterializedLiteral: public Expression { |
| 889 | public: |
| 890 | explicit MaterializedLiteral(int literal_index, bool is_simple, int depth) |
| 891 | : literal_index_(literal_index), is_simple_(is_simple), depth_(depth) {} |
| 892 | |
| 893 | virtual MaterializedLiteral* AsMaterializedLiteral() { return this; } |
| 894 | |
| 895 | int literal_index() { return literal_index_; } |
| 896 | |
| 897 | // A materialized literal is simple if the values consist of only |
| 898 | // constants and simple object and array literals. |
| 899 | bool is_simple() const { return is_simple_; } |
| 900 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 901 | int depth() const { return depth_; } |
| 902 | |
| 903 | private: |
| 904 | int literal_index_; |
| 905 | bool is_simple_; |
| 906 | int depth_; |
| 907 | }; |
| 908 | |
| 909 | |
| 910 | // An object literal has a boilerplate object that is used |
| 911 | // for minimizing the work when constructing it at runtime. |
| 912 | class ObjectLiteral: public MaterializedLiteral { |
| 913 | public: |
| 914 | // Property is used for passing information |
| 915 | // about an object literal's properties from the parser |
| 916 | // to the code generator. |
| 917 | class Property: public ZoneObject { |
| 918 | public: |
| 919 | |
| 920 | enum Kind { |
| 921 | CONSTANT, // Property with constant value (compile time). |
| 922 | COMPUTED, // Property with computed value (execution time). |
| 923 | MATERIALIZED_LITERAL, // Property value is a materialized literal. |
| 924 | GETTER, SETTER, // Property is an accessor function. |
| 925 | PROTOTYPE // Property is __proto__. |
| 926 | }; |
| 927 | |
| 928 | Property(Literal* key, Expression* value); |
| 929 | Property(bool is_getter, FunctionLiteral* value); |
| 930 | |
| 931 | Literal* key() { return key_; } |
| 932 | Expression* value() { return value_; } |
| 933 | Kind kind() { return kind_; } |
| 934 | |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 935 | bool IsCompileTimeValue(); |
| 936 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 937 | private: |
| 938 | Literal* key_; |
| 939 | Expression* value_; |
| 940 | Kind kind_; |
| 941 | }; |
| 942 | |
| 943 | ObjectLiteral(Handle<FixedArray> constant_properties, |
| 944 | ZoneList<Property*>* properties, |
| 945 | int literal_index, |
| 946 | bool is_simple, |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 947 | bool fast_elements, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 948 | int depth) |
| 949 | : MaterializedLiteral(literal_index, is_simple, depth), |
| 950 | constant_properties_(constant_properties), |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 951 | properties_(properties), |
| 952 | fast_elements_(fast_elements) {} |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 953 | |
| 954 | virtual ObjectLiteral* AsObjectLiteral() { return this; } |
| 955 | virtual void Accept(AstVisitor* v); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 956 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 957 | virtual bool IsLeaf() { return properties()->is_empty(); } |
| 958 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 959 | virtual bool IsPrimitive(); |
| 960 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 961 | Handle<FixedArray> constant_properties() const { |
| 962 | return constant_properties_; |
| 963 | } |
| 964 | ZoneList<Property*>* properties() const { return properties_; } |
| 965 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 966 | bool fast_elements() const { return fast_elements_; } |
| 967 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 968 | private: |
| 969 | Handle<FixedArray> constant_properties_; |
| 970 | ZoneList<Property*>* properties_; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 971 | bool fast_elements_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 972 | }; |
| 973 | |
| 974 | |
| 975 | // Node for capturing a regexp literal. |
| 976 | class RegExpLiteral: public MaterializedLiteral { |
| 977 | public: |
| 978 | RegExpLiteral(Handle<String> pattern, |
| 979 | Handle<String> flags, |
| 980 | int literal_index) |
| 981 | : MaterializedLiteral(literal_index, false, 1), |
| 982 | pattern_(pattern), |
| 983 | flags_(flags) {} |
| 984 | |
| 985 | virtual void Accept(AstVisitor* v); |
| 986 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 987 | virtual bool IsLeaf() { return true; } |
| 988 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 989 | virtual bool IsPrimitive(); |
| 990 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 991 | Handle<String> pattern() const { return pattern_; } |
| 992 | Handle<String> flags() const { return flags_; } |
| 993 | |
| 994 | private: |
| 995 | Handle<String> pattern_; |
| 996 | Handle<String> flags_; |
| 997 | }; |
| 998 | |
| 999 | // An array literal has a literals object that is used |
| 1000 | // for minimizing the work when constructing it at runtime. |
| 1001 | class ArrayLiteral: public MaterializedLiteral { |
| 1002 | public: |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1003 | ArrayLiteral(Handle<FixedArray> constant_elements, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1004 | ZoneList<Expression*>* values, |
| 1005 | int literal_index, |
| 1006 | bool is_simple, |
| 1007 | int depth) |
| 1008 | : MaterializedLiteral(literal_index, is_simple, depth), |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1009 | constant_elements_(constant_elements), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1010 | values_(values) {} |
| 1011 | |
| 1012 | virtual void Accept(AstVisitor* v); |
| 1013 | virtual ArrayLiteral* AsArrayLiteral() { return this; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1014 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1015 | virtual bool IsLeaf() { return values()->is_empty(); } |
| 1016 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1017 | virtual bool IsPrimitive(); |
| 1018 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1019 | Handle<FixedArray> constant_elements() const { return constant_elements_; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1020 | ZoneList<Expression*>* values() const { return values_; } |
| 1021 | |
| 1022 | private: |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1023 | Handle<FixedArray> constant_elements_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1024 | ZoneList<Expression*>* values_; |
| 1025 | }; |
| 1026 | |
| 1027 | |
| 1028 | // Node for constructing a context extension object for a catch block. |
| 1029 | // The catch context extension object has one property, the catch |
| 1030 | // variable, which should be DontDelete. |
| 1031 | class CatchExtensionObject: public Expression { |
| 1032 | public: |
| 1033 | CatchExtensionObject(Literal* key, VariableProxy* value) |
| 1034 | : key_(key), value_(value) { |
| 1035 | } |
| 1036 | |
| 1037 | virtual void Accept(AstVisitor* v); |
| 1038 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1039 | virtual bool IsPrimitive(); |
| 1040 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1041 | Literal* key() const { return key_; } |
| 1042 | VariableProxy* value() const { return value_; } |
| 1043 | |
| 1044 | private: |
| 1045 | Literal* key_; |
| 1046 | VariableProxy* value_; |
| 1047 | }; |
| 1048 | |
| 1049 | |
| 1050 | class VariableProxy: public Expression { |
| 1051 | public: |
| 1052 | virtual void Accept(AstVisitor* v); |
| 1053 | |
| 1054 | // Type testing & conversion |
| 1055 | virtual Property* AsProperty() { |
| 1056 | return var_ == NULL ? NULL : var_->AsProperty(); |
| 1057 | } |
| 1058 | virtual VariableProxy* AsVariableProxy() { return this; } |
| 1059 | |
| 1060 | Variable* AsVariable() { |
| 1061 | return this == NULL || var_ == NULL ? NULL : var_->AsVariable(); |
| 1062 | } |
| 1063 | |
| 1064 | virtual bool IsValidLeftHandSide() { |
| 1065 | return var_ == NULL ? true : var_->IsValidLeftHandSide(); |
| 1066 | } |
| 1067 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1068 | virtual bool IsLeaf() { |
| 1069 | ASSERT(var_ != NULL); // Variable must be resolved. |
| 1070 | return var()->is_global() || var()->rewrite()->IsLeaf(); |
| 1071 | } |
| 1072 | |
| 1073 | // Reading from a mutable variable is a side effect, but 'this' is |
| 1074 | // immutable. |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1075 | virtual bool IsTrivial() { return is_trivial_; } |
| 1076 | |
| 1077 | virtual bool IsPrimitive(); |
| 1078 | virtual bool IsCritical(); |
| 1079 | |
| 1080 | void SetIsPrimitive(bool value) { is_primitive_ = value; } |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1081 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1082 | bool IsVariable(Handle<String> n) { |
| 1083 | return !is_this() && name().is_identical_to(n); |
| 1084 | } |
| 1085 | |
| 1086 | bool IsArguments() { |
| 1087 | Variable* variable = AsVariable(); |
| 1088 | return (variable == NULL) ? false : variable->is_arguments(); |
| 1089 | } |
| 1090 | |
| 1091 | Handle<String> name() const { return name_; } |
| 1092 | Variable* var() const { return var_; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1093 | bool is_this() const { return is_this_; } |
| 1094 | bool inside_with() const { return inside_with_; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1095 | bool is_trivial() { return is_trivial_; } |
| 1096 | void set_is_trivial(bool b) { is_trivial_ = b; } |
| 1097 | |
| 1098 | BitVector* reaching_definitions() { return reaching_definitions_; } |
| 1099 | void set_reaching_definitions(BitVector* rd) { reaching_definitions_ = rd; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1100 | |
| 1101 | // Bind this proxy to the variable var. |
| 1102 | void BindTo(Variable* var); |
| 1103 | |
| 1104 | protected: |
| 1105 | Handle<String> name_; |
| 1106 | Variable* var_; // resolved variable, or NULL |
| 1107 | bool is_this_; |
| 1108 | bool inside_with_; |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1109 | bool is_trivial_; |
| 1110 | BitVector* reaching_definitions_; |
| 1111 | bool is_primitive_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1112 | |
| 1113 | VariableProxy(Handle<String> name, bool is_this, bool inside_with); |
| 1114 | explicit VariableProxy(bool is_this); |
| 1115 | |
| 1116 | friend class Scope; |
| 1117 | }; |
| 1118 | |
| 1119 | |
| 1120 | class VariableProxySentinel: public VariableProxy { |
| 1121 | public: |
| 1122 | virtual bool IsValidLeftHandSide() { return !is_this(); } |
| 1123 | static VariableProxySentinel* this_proxy() { return &this_proxy_; } |
| 1124 | static VariableProxySentinel* identifier_proxy() { |
| 1125 | return &identifier_proxy_; |
| 1126 | } |
| 1127 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1128 | virtual bool IsPrimitive() { |
| 1129 | UNREACHABLE(); |
| 1130 | return false; |
| 1131 | } |
| 1132 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1133 | private: |
| 1134 | explicit VariableProxySentinel(bool is_this) : VariableProxy(is_this) { } |
| 1135 | static VariableProxySentinel this_proxy_; |
| 1136 | static VariableProxySentinel identifier_proxy_; |
| 1137 | }; |
| 1138 | |
| 1139 | |
| 1140 | class Slot: public Expression { |
| 1141 | public: |
| 1142 | enum Type { |
| 1143 | // A slot in the parameter section on the stack. index() is |
| 1144 | // the parameter index, counting left-to-right, starting at 0. |
| 1145 | PARAMETER, |
| 1146 | |
| 1147 | // A slot in the local section on the stack. index() is |
| 1148 | // the variable index in the stack frame, starting at 0. |
| 1149 | LOCAL, |
| 1150 | |
| 1151 | // An indexed slot in a heap context. index() is the |
| 1152 | // variable index in the context object on the heap, |
| 1153 | // starting at 0. var()->scope() is the corresponding |
| 1154 | // scope. |
| 1155 | CONTEXT, |
| 1156 | |
| 1157 | // A named slot in a heap context. var()->name() is the |
| 1158 | // variable name in the context object on the heap, |
| 1159 | // with lookup starting at the current context. index() |
| 1160 | // is invalid. |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1161 | LOOKUP |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1162 | }; |
| 1163 | |
| 1164 | Slot(Variable* var, Type type, int index) |
| 1165 | : var_(var), type_(type), index_(index) { |
| 1166 | ASSERT(var != NULL); |
| 1167 | } |
| 1168 | |
| 1169 | virtual void Accept(AstVisitor* v); |
| 1170 | |
| 1171 | // Type testing & conversion |
| 1172 | virtual Slot* AsSlot() { return this; } |
| 1173 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1174 | virtual bool IsLeaf() { return true; } |
| 1175 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1176 | virtual bool IsPrimitive() { |
| 1177 | UNREACHABLE(); |
| 1178 | return false; |
| 1179 | } |
| 1180 | |
| 1181 | bool IsStackAllocated() { return type_ == PARAMETER || type_ == LOCAL; } |
| 1182 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1183 | // Accessors |
| 1184 | Variable* var() const { return var_; } |
| 1185 | Type type() const { return type_; } |
| 1186 | int index() const { return index_; } |
| 1187 | bool is_arguments() const { return var_->is_arguments(); } |
| 1188 | |
| 1189 | private: |
| 1190 | Variable* var_; |
| 1191 | Type type_; |
| 1192 | int index_; |
| 1193 | }; |
| 1194 | |
| 1195 | |
| 1196 | class Property: public Expression { |
| 1197 | public: |
| 1198 | // Synthetic properties are property lookups introduced by the system, |
| 1199 | // to objects that aren't visible to the user. Function calls to synthetic |
| 1200 | // properties should use the global object as receiver, not the base object |
| 1201 | // of the resolved Reference. |
| 1202 | enum Type { NORMAL, SYNTHETIC }; |
| 1203 | Property(Expression* obj, Expression* key, int pos, Type type = NORMAL) |
| 1204 | : obj_(obj), key_(key), pos_(pos), type_(type) { } |
| 1205 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1206 | Property(Property* other, Expression* obj, Expression* key); |
| 1207 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1208 | virtual void Accept(AstVisitor* v); |
| 1209 | |
| 1210 | // Type testing & conversion |
| 1211 | virtual Property* AsProperty() { return this; } |
| 1212 | |
| 1213 | virtual bool IsValidLeftHandSide() { return true; } |
| 1214 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1215 | virtual bool IsPrimitive(); |
| 1216 | virtual bool IsCritical(); |
| 1217 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1218 | Expression* obj() const { return obj_; } |
| 1219 | Expression* key() const { return key_; } |
| 1220 | int position() const { return pos_; } |
| 1221 | bool is_synthetic() const { return type_ == SYNTHETIC; } |
| 1222 | |
| 1223 | // Returns a property singleton property access on 'this'. Used |
| 1224 | // during preparsing. |
| 1225 | static Property* this_property() { return &this_property_; } |
| 1226 | |
| 1227 | private: |
| 1228 | Expression* obj_; |
| 1229 | Expression* key_; |
| 1230 | int pos_; |
| 1231 | Type type_; |
| 1232 | |
| 1233 | // Dummy property used during preparsing. |
| 1234 | static Property this_property_; |
| 1235 | }; |
| 1236 | |
| 1237 | |
| 1238 | class Call: public Expression { |
| 1239 | public: |
| 1240 | Call(Expression* expression, ZoneList<Expression*>* arguments, int pos) |
| 1241 | : expression_(expression), arguments_(arguments), pos_(pos) { } |
| 1242 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1243 | Call(Call* other, Expression* expression, ZoneList<Expression*>* arguments); |
| 1244 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1245 | virtual void Accept(AstVisitor* v); |
| 1246 | |
| 1247 | // Type testing and conversion. |
| 1248 | virtual Call* AsCall() { return this; } |
| 1249 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1250 | virtual bool IsPrimitive(); |
| 1251 | virtual bool IsCritical(); |
| 1252 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1253 | Expression* expression() const { return expression_; } |
| 1254 | ZoneList<Expression*>* arguments() const { return arguments_; } |
| 1255 | int position() { return pos_; } |
| 1256 | |
| 1257 | static Call* sentinel() { return &sentinel_; } |
| 1258 | |
| 1259 | private: |
| 1260 | Expression* expression_; |
| 1261 | ZoneList<Expression*>* arguments_; |
| 1262 | int pos_; |
| 1263 | |
| 1264 | static Call sentinel_; |
| 1265 | }; |
| 1266 | |
| 1267 | |
| 1268 | class CallNew: public Expression { |
| 1269 | public: |
| 1270 | CallNew(Expression* expression, ZoneList<Expression*>* arguments, int pos) |
| 1271 | : expression_(expression), arguments_(arguments), pos_(pos) { } |
| 1272 | |
| 1273 | virtual void Accept(AstVisitor* v); |
| 1274 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1275 | virtual bool IsPrimitive(); |
| 1276 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1277 | Expression* expression() const { return expression_; } |
| 1278 | ZoneList<Expression*>* arguments() const { return arguments_; } |
| 1279 | int position() { return pos_; } |
| 1280 | |
| 1281 | private: |
| 1282 | Expression* expression_; |
| 1283 | ZoneList<Expression*>* arguments_; |
| 1284 | int pos_; |
| 1285 | }; |
| 1286 | |
| 1287 | |
| 1288 | // The CallRuntime class does not represent any official JavaScript |
| 1289 | // language construct. Instead it is used to call a C or JS function |
| 1290 | // with a set of arguments. This is used from the builtins that are |
| 1291 | // implemented in JavaScript (see "v8natives.js"). |
| 1292 | class CallRuntime: public Expression { |
| 1293 | public: |
| 1294 | CallRuntime(Handle<String> name, |
| 1295 | Runtime::Function* function, |
| 1296 | ZoneList<Expression*>* arguments) |
| 1297 | : name_(name), function_(function), arguments_(arguments) { } |
| 1298 | |
| 1299 | virtual void Accept(AstVisitor* v); |
| 1300 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1301 | virtual bool IsPrimitive(); |
| 1302 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1303 | Handle<String> name() const { return name_; } |
| 1304 | Runtime::Function* function() const { return function_; } |
| 1305 | ZoneList<Expression*>* arguments() const { return arguments_; } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1306 | bool is_jsruntime() const { return function_ == NULL; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1307 | |
| 1308 | private: |
| 1309 | Handle<String> name_; |
| 1310 | Runtime::Function* function_; |
| 1311 | ZoneList<Expression*>* arguments_; |
| 1312 | }; |
| 1313 | |
| 1314 | |
| 1315 | class UnaryOperation: public Expression { |
| 1316 | public: |
| 1317 | UnaryOperation(Token::Value op, Expression* expression) |
| 1318 | : op_(op), expression_(expression) { |
| 1319 | ASSERT(Token::IsUnaryOp(op)); |
| 1320 | } |
| 1321 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1322 | UnaryOperation(UnaryOperation* other, Expression* expression); |
| 1323 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1324 | virtual void Accept(AstVisitor* v); |
| 1325 | |
| 1326 | // Type testing & conversion |
| 1327 | virtual UnaryOperation* AsUnaryOperation() { return this; } |
| 1328 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1329 | virtual bool IsPrimitive(); |
| 1330 | virtual bool IsCritical(); |
| 1331 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1332 | Token::Value op() const { return op_; } |
| 1333 | Expression* expression() const { return expression_; } |
| 1334 | |
| 1335 | private: |
| 1336 | Token::Value op_; |
| 1337 | Expression* expression_; |
| 1338 | }; |
| 1339 | |
| 1340 | |
| 1341 | class BinaryOperation: public Expression { |
| 1342 | public: |
| 1343 | BinaryOperation(Token::Value op, Expression* left, Expression* right) |
| 1344 | : op_(op), left_(left), right_(right) { |
| 1345 | ASSERT(Token::IsBinaryOp(op)); |
| 1346 | } |
| 1347 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1348 | // Construct a binary operation with a given operator and left and right |
| 1349 | // subexpressions. The rest of the expression state is copied from |
| 1350 | // another expression. |
| 1351 | BinaryOperation(Expression* other, |
| 1352 | Token::Value op, |
| 1353 | Expression* left, |
| 1354 | Expression* right); |
| 1355 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1356 | virtual void Accept(AstVisitor* v); |
| 1357 | |
| 1358 | // Type testing & conversion |
| 1359 | virtual BinaryOperation* AsBinaryOperation() { return this; } |
| 1360 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1361 | virtual bool IsPrimitive(); |
| 1362 | virtual bool IsCritical(); |
| 1363 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1364 | // True iff the result can be safely overwritten (to avoid allocation). |
| 1365 | // False for operations that can return one of their operands. |
| 1366 | bool ResultOverwriteAllowed() { |
| 1367 | switch (op_) { |
| 1368 | case Token::COMMA: |
| 1369 | case Token::OR: |
| 1370 | case Token::AND: |
| 1371 | return false; |
| 1372 | case Token::BIT_OR: |
| 1373 | case Token::BIT_XOR: |
| 1374 | case Token::BIT_AND: |
| 1375 | case Token::SHL: |
| 1376 | case Token::SAR: |
| 1377 | case Token::SHR: |
| 1378 | case Token::ADD: |
| 1379 | case Token::SUB: |
| 1380 | case Token::MUL: |
| 1381 | case Token::DIV: |
| 1382 | case Token::MOD: |
| 1383 | return true; |
| 1384 | default: |
| 1385 | UNREACHABLE(); |
| 1386 | } |
| 1387 | return false; |
| 1388 | } |
| 1389 | |
| 1390 | Token::Value op() const { return op_; } |
| 1391 | Expression* left() const { return left_; } |
| 1392 | Expression* right() const { return right_; } |
| 1393 | |
| 1394 | private: |
| 1395 | Token::Value op_; |
| 1396 | Expression* left_; |
| 1397 | Expression* right_; |
| 1398 | }; |
| 1399 | |
| 1400 | |
| 1401 | class CountOperation: public Expression { |
| 1402 | public: |
| 1403 | CountOperation(bool is_prefix, Token::Value op, Expression* expression) |
| 1404 | : is_prefix_(is_prefix), op_(op), expression_(expression) { |
| 1405 | ASSERT(Token::IsCountOp(op)); |
| 1406 | } |
| 1407 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1408 | CountOperation(CountOperation* other, Expression* expression); |
| 1409 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1410 | virtual void Accept(AstVisitor* v); |
| 1411 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1412 | virtual CountOperation* AsCountOperation() { return this; } |
| 1413 | |
| 1414 | virtual Variable* AssignedVariable() { |
| 1415 | return expression()->AsVariableProxy()->AsVariable(); |
| 1416 | } |
| 1417 | |
| 1418 | virtual bool IsPrimitive(); |
| 1419 | virtual bool IsCritical(); |
| 1420 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1421 | bool is_prefix() const { return is_prefix_; } |
| 1422 | bool is_postfix() const { return !is_prefix_; } |
| 1423 | Token::Value op() const { return op_; } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1424 | Token::Value binary_op() { |
| 1425 | return op_ == Token::INC ? Token::ADD : Token::SUB; |
| 1426 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1427 | Expression* expression() const { return expression_; } |
| 1428 | |
| 1429 | virtual void MarkAsStatement() { is_prefix_ = true; } |
| 1430 | |
| 1431 | private: |
| 1432 | bool is_prefix_; |
| 1433 | Token::Value op_; |
| 1434 | Expression* expression_; |
| 1435 | }; |
| 1436 | |
| 1437 | |
| 1438 | class CompareOperation: public Expression { |
| 1439 | public: |
| 1440 | CompareOperation(Token::Value op, Expression* left, Expression* right) |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1441 | : op_(op), left_(left), right_(right) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1442 | ASSERT(Token::IsCompareOp(op)); |
| 1443 | } |
| 1444 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1445 | CompareOperation(CompareOperation* other, |
| 1446 | Expression* left, |
| 1447 | Expression* right); |
| 1448 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1449 | virtual void Accept(AstVisitor* v); |
| 1450 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1451 | virtual bool IsPrimitive(); |
| 1452 | virtual bool IsCritical(); |
| 1453 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1454 | Token::Value op() const { return op_; } |
| 1455 | Expression* left() const { return left_; } |
| 1456 | Expression* right() const { return right_; } |
| 1457 | |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1458 | // Type testing & conversion |
| 1459 | virtual CompareOperation* AsCompareOperation() { return this; } |
| 1460 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1461 | private: |
| 1462 | Token::Value op_; |
| 1463 | Expression* left_; |
| 1464 | Expression* right_; |
| 1465 | }; |
| 1466 | |
| 1467 | |
| 1468 | class Conditional: public Expression { |
| 1469 | public: |
| 1470 | Conditional(Expression* condition, |
| 1471 | Expression* then_expression, |
| 1472 | Expression* else_expression) |
| 1473 | : condition_(condition), |
| 1474 | then_expression_(then_expression), |
| 1475 | else_expression_(else_expression) { } |
| 1476 | |
| 1477 | virtual void Accept(AstVisitor* v); |
| 1478 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1479 | virtual bool IsPrimitive(); |
| 1480 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1481 | Expression* condition() const { return condition_; } |
| 1482 | Expression* then_expression() const { return then_expression_; } |
| 1483 | Expression* else_expression() const { return else_expression_; } |
| 1484 | |
| 1485 | private: |
| 1486 | Expression* condition_; |
| 1487 | Expression* then_expression_; |
| 1488 | Expression* else_expression_; |
| 1489 | }; |
| 1490 | |
| 1491 | |
| 1492 | class Assignment: public Expression { |
| 1493 | public: |
| 1494 | Assignment(Token::Value op, Expression* target, Expression* value, int pos) |
| 1495 | : op_(op), target_(target), value_(value), pos_(pos), |
| 1496 | block_start_(false), block_end_(false) { |
| 1497 | ASSERT(Token::IsAssignmentOp(op)); |
| 1498 | } |
| 1499 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1500 | Assignment(Assignment* other, Expression* target, Expression* value); |
| 1501 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1502 | virtual void Accept(AstVisitor* v); |
| 1503 | virtual Assignment* AsAssignment() { return this; } |
| 1504 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1505 | virtual bool IsPrimitive(); |
| 1506 | virtual bool IsCritical(); |
| 1507 | |
| 1508 | Assignment* AsSimpleAssignment() { return !is_compound() ? this : NULL; } |
| 1509 | |
| 1510 | virtual Variable* AssignedVariable() { |
| 1511 | return target()->AsVariableProxy()->AsVariable(); |
| 1512 | } |
| 1513 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1514 | Token::Value binary_op() const; |
| 1515 | |
| 1516 | Token::Value op() const { return op_; } |
| 1517 | Expression* target() const { return target_; } |
| 1518 | Expression* value() const { return value_; } |
| 1519 | int position() { return pos_; } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1520 | // This check relies on the definition order of token in token.h. |
| 1521 | bool is_compound() const { return op() > Token::ASSIGN; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1522 | |
| 1523 | // An initialization block is a series of statments of the form |
| 1524 | // x.y.z.a = ...; x.y.z.b = ...; etc. The parser marks the beginning and |
| 1525 | // ending of these blocks to allow for optimizations of initialization |
| 1526 | // blocks. |
| 1527 | bool starts_initialization_block() { return block_start_; } |
| 1528 | bool ends_initialization_block() { return block_end_; } |
| 1529 | void mark_block_start() { block_start_ = true; } |
| 1530 | void mark_block_end() { block_end_ = true; } |
| 1531 | |
| 1532 | private: |
| 1533 | Token::Value op_; |
| 1534 | Expression* target_; |
| 1535 | Expression* value_; |
| 1536 | int pos_; |
| 1537 | bool block_start_; |
| 1538 | bool block_end_; |
| 1539 | }; |
| 1540 | |
| 1541 | |
| 1542 | class Throw: public Expression { |
| 1543 | public: |
| 1544 | Throw(Expression* exception, int pos) |
| 1545 | : exception_(exception), pos_(pos) {} |
| 1546 | |
| 1547 | virtual void Accept(AstVisitor* v); |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1548 | |
| 1549 | virtual bool IsPrimitive(); |
| 1550 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1551 | Expression* exception() const { return exception_; } |
| 1552 | int position() const { return pos_; } |
| 1553 | |
| 1554 | private: |
| 1555 | Expression* exception_; |
| 1556 | int pos_; |
| 1557 | }; |
| 1558 | |
| 1559 | |
| 1560 | class FunctionLiteral: public Expression { |
| 1561 | public: |
| 1562 | FunctionLiteral(Handle<String> name, |
| 1563 | Scope* scope, |
| 1564 | ZoneList<Statement*>* body, |
| 1565 | int materialized_literal_count, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1566 | int expected_property_count, |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1567 | bool has_only_simple_this_property_assignments, |
| 1568 | Handle<FixedArray> this_property_assignments, |
| 1569 | int num_parameters, |
| 1570 | int start_position, |
| 1571 | int end_position, |
| 1572 | bool is_expression) |
| 1573 | : name_(name), |
| 1574 | scope_(scope), |
| 1575 | body_(body), |
| 1576 | materialized_literal_count_(materialized_literal_count), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1577 | expected_property_count_(expected_property_count), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1578 | has_only_simple_this_property_assignments_( |
| 1579 | has_only_simple_this_property_assignments), |
| 1580 | this_property_assignments_(this_property_assignments), |
| 1581 | num_parameters_(num_parameters), |
| 1582 | start_position_(start_position), |
| 1583 | end_position_(end_position), |
| 1584 | is_expression_(is_expression), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1585 | function_token_position_(RelocInfo::kNoPosition), |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1586 | inferred_name_(Heap::empty_string()), |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 1587 | try_full_codegen_(false) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1588 | #ifdef DEBUG |
| 1589 | already_compiled_ = false; |
| 1590 | #endif |
| 1591 | } |
| 1592 | |
| 1593 | virtual void Accept(AstVisitor* v); |
| 1594 | |
| 1595 | // Type testing & conversion |
| 1596 | virtual FunctionLiteral* AsFunctionLiteral() { return this; } |
| 1597 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1598 | virtual bool IsLeaf() { return true; } |
| 1599 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1600 | virtual bool IsPrimitive(); |
| 1601 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1602 | Handle<String> name() const { return name_; } |
| 1603 | Scope* scope() const { return scope_; } |
| 1604 | ZoneList<Statement*>* body() const { return body_; } |
| 1605 | void set_function_token_position(int pos) { function_token_position_ = pos; } |
| 1606 | int function_token_position() const { return function_token_position_; } |
| 1607 | int start_position() const { return start_position_; } |
| 1608 | int end_position() const { return end_position_; } |
| 1609 | bool is_expression() const { return is_expression_; } |
| 1610 | |
| 1611 | int materialized_literal_count() { return materialized_literal_count_; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1612 | int expected_property_count() { return expected_property_count_; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1613 | bool has_only_simple_this_property_assignments() { |
| 1614 | return has_only_simple_this_property_assignments_; |
| 1615 | } |
| 1616 | Handle<FixedArray> this_property_assignments() { |
| 1617 | return this_property_assignments_; |
| 1618 | } |
| 1619 | int num_parameters() { return num_parameters_; } |
| 1620 | |
| 1621 | bool AllowsLazyCompilation(); |
| 1622 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1623 | Handle<String> inferred_name() const { return inferred_name_; } |
| 1624 | void set_inferred_name(Handle<String> inferred_name) { |
| 1625 | inferred_name_ = inferred_name; |
| 1626 | } |
| 1627 | |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 1628 | bool try_full_codegen() { return try_full_codegen_; } |
| 1629 | void set_try_full_codegen(bool flag) { try_full_codegen_ = flag; } |
Steve Block | d0582a6 | 2009-12-15 09:54:21 +0000 | [diff] [blame] | 1630 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1631 | #ifdef DEBUG |
| 1632 | void mark_as_compiled() { |
| 1633 | ASSERT(!already_compiled_); |
| 1634 | already_compiled_ = true; |
| 1635 | } |
| 1636 | #endif |
| 1637 | |
| 1638 | private: |
| 1639 | Handle<String> name_; |
| 1640 | Scope* scope_; |
| 1641 | ZoneList<Statement*>* body_; |
| 1642 | int materialized_literal_count_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1643 | int expected_property_count_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1644 | bool has_only_simple_this_property_assignments_; |
| 1645 | Handle<FixedArray> this_property_assignments_; |
| 1646 | int num_parameters_; |
| 1647 | int start_position_; |
| 1648 | int end_position_; |
| 1649 | bool is_expression_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1650 | int function_token_position_; |
| 1651 | Handle<String> inferred_name_; |
Leon Clarke | d91b9f7 | 2010-01-27 17:25:45 +0000 | [diff] [blame] | 1652 | bool try_full_codegen_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1653 | #ifdef DEBUG |
| 1654 | bool already_compiled_; |
| 1655 | #endif |
| 1656 | }; |
| 1657 | |
| 1658 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1659 | class SharedFunctionInfoLiteral: public Expression { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1660 | public: |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1661 | explicit SharedFunctionInfoLiteral( |
| 1662 | Handle<SharedFunctionInfo> shared_function_info) |
| 1663 | : shared_function_info_(shared_function_info) { } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1664 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1665 | Handle<SharedFunctionInfo> shared_function_info() const { |
| 1666 | return shared_function_info_; |
| 1667 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1668 | |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1669 | virtual bool IsLeaf() { return true; } |
| 1670 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1671 | virtual void Accept(AstVisitor* v); |
| 1672 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1673 | virtual bool IsPrimitive(); |
| 1674 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1675 | private: |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1676 | Handle<SharedFunctionInfo> shared_function_info_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1677 | }; |
| 1678 | |
| 1679 | |
| 1680 | class ThisFunction: public Expression { |
| 1681 | public: |
| 1682 | virtual void Accept(AstVisitor* v); |
Andrei Popescu | 402d937 | 2010-02-26 13:31:12 +0000 | [diff] [blame] | 1683 | virtual bool IsLeaf() { return true; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 1684 | virtual bool IsPrimitive(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1685 | }; |
| 1686 | |
| 1687 | |
| 1688 | // ---------------------------------------------------------------------------- |
| 1689 | // Regular expressions |
| 1690 | |
| 1691 | |
| 1692 | class RegExpVisitor BASE_EMBEDDED { |
| 1693 | public: |
| 1694 | virtual ~RegExpVisitor() { } |
| 1695 | #define MAKE_CASE(Name) \ |
| 1696 | virtual void* Visit##Name(RegExp##Name*, void* data) = 0; |
| 1697 | FOR_EACH_REG_EXP_TREE_TYPE(MAKE_CASE) |
| 1698 | #undef MAKE_CASE |
| 1699 | }; |
| 1700 | |
| 1701 | |
| 1702 | class RegExpTree: public ZoneObject { |
| 1703 | public: |
| 1704 | static const int kInfinity = kMaxInt; |
| 1705 | virtual ~RegExpTree() { } |
| 1706 | virtual void* Accept(RegExpVisitor* visitor, void* data) = 0; |
| 1707 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 1708 | RegExpNode* on_success) = 0; |
| 1709 | virtual bool IsTextElement() { return false; } |
| 1710 | virtual bool IsAnchored() { return false; } |
| 1711 | virtual int min_match() = 0; |
| 1712 | virtual int max_match() = 0; |
| 1713 | // Returns the interval of registers used for captures within this |
| 1714 | // expression. |
| 1715 | virtual Interval CaptureRegisters() { return Interval::Empty(); } |
| 1716 | virtual void AppendToText(RegExpText* text); |
| 1717 | SmartPointer<const char> ToString(); |
| 1718 | #define MAKE_ASTYPE(Name) \ |
| 1719 | virtual RegExp##Name* As##Name(); \ |
| 1720 | virtual bool Is##Name(); |
| 1721 | FOR_EACH_REG_EXP_TREE_TYPE(MAKE_ASTYPE) |
| 1722 | #undef MAKE_ASTYPE |
| 1723 | }; |
| 1724 | |
| 1725 | |
| 1726 | class RegExpDisjunction: public RegExpTree { |
| 1727 | public: |
| 1728 | explicit RegExpDisjunction(ZoneList<RegExpTree*>* alternatives); |
| 1729 | virtual void* Accept(RegExpVisitor* visitor, void* data); |
| 1730 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 1731 | RegExpNode* on_success); |
| 1732 | virtual RegExpDisjunction* AsDisjunction(); |
| 1733 | virtual Interval CaptureRegisters(); |
| 1734 | virtual bool IsDisjunction(); |
| 1735 | virtual bool IsAnchored(); |
| 1736 | virtual int min_match() { return min_match_; } |
| 1737 | virtual int max_match() { return max_match_; } |
| 1738 | ZoneList<RegExpTree*>* alternatives() { return alternatives_; } |
| 1739 | private: |
| 1740 | ZoneList<RegExpTree*>* alternatives_; |
| 1741 | int min_match_; |
| 1742 | int max_match_; |
| 1743 | }; |
| 1744 | |
| 1745 | |
| 1746 | class RegExpAlternative: public RegExpTree { |
| 1747 | public: |
| 1748 | explicit RegExpAlternative(ZoneList<RegExpTree*>* nodes); |
| 1749 | virtual void* Accept(RegExpVisitor* visitor, void* data); |
| 1750 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 1751 | RegExpNode* on_success); |
| 1752 | virtual RegExpAlternative* AsAlternative(); |
| 1753 | virtual Interval CaptureRegisters(); |
| 1754 | virtual bool IsAlternative(); |
| 1755 | virtual bool IsAnchored(); |
| 1756 | virtual int min_match() { return min_match_; } |
| 1757 | virtual int max_match() { return max_match_; } |
| 1758 | ZoneList<RegExpTree*>* nodes() { return nodes_; } |
| 1759 | private: |
| 1760 | ZoneList<RegExpTree*>* nodes_; |
| 1761 | int min_match_; |
| 1762 | int max_match_; |
| 1763 | }; |
| 1764 | |
| 1765 | |
| 1766 | class RegExpAssertion: public RegExpTree { |
| 1767 | public: |
| 1768 | enum Type { |
| 1769 | START_OF_LINE, |
| 1770 | START_OF_INPUT, |
| 1771 | END_OF_LINE, |
| 1772 | END_OF_INPUT, |
| 1773 | BOUNDARY, |
| 1774 | NON_BOUNDARY |
| 1775 | }; |
| 1776 | explicit RegExpAssertion(Type type) : type_(type) { } |
| 1777 | virtual void* Accept(RegExpVisitor* visitor, void* data); |
| 1778 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 1779 | RegExpNode* on_success); |
| 1780 | virtual RegExpAssertion* AsAssertion(); |
| 1781 | virtual bool IsAssertion(); |
| 1782 | virtual bool IsAnchored(); |
| 1783 | virtual int min_match() { return 0; } |
| 1784 | virtual int max_match() { return 0; } |
| 1785 | Type type() { return type_; } |
| 1786 | private: |
| 1787 | Type type_; |
| 1788 | }; |
| 1789 | |
| 1790 | |
| 1791 | class CharacterSet BASE_EMBEDDED { |
| 1792 | public: |
| 1793 | explicit CharacterSet(uc16 standard_set_type) |
| 1794 | : ranges_(NULL), |
| 1795 | standard_set_type_(standard_set_type) {} |
| 1796 | explicit CharacterSet(ZoneList<CharacterRange>* ranges) |
| 1797 | : ranges_(ranges), |
| 1798 | standard_set_type_(0) {} |
| 1799 | ZoneList<CharacterRange>* ranges(); |
| 1800 | uc16 standard_set_type() { return standard_set_type_; } |
| 1801 | void set_standard_set_type(uc16 special_set_type) { |
| 1802 | standard_set_type_ = special_set_type; |
| 1803 | } |
| 1804 | bool is_standard() { return standard_set_type_ != 0; } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1805 | void Canonicalize(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1806 | private: |
| 1807 | ZoneList<CharacterRange>* ranges_; |
| 1808 | // If non-zero, the value represents a standard set (e.g., all whitespace |
| 1809 | // characters) without having to expand the ranges. |
| 1810 | uc16 standard_set_type_; |
| 1811 | }; |
| 1812 | |
| 1813 | |
| 1814 | class RegExpCharacterClass: public RegExpTree { |
| 1815 | public: |
| 1816 | RegExpCharacterClass(ZoneList<CharacterRange>* ranges, bool is_negated) |
| 1817 | : set_(ranges), |
| 1818 | is_negated_(is_negated) { } |
| 1819 | explicit RegExpCharacterClass(uc16 type) |
| 1820 | : set_(type), |
| 1821 | is_negated_(false) { } |
| 1822 | virtual void* Accept(RegExpVisitor* visitor, void* data); |
| 1823 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 1824 | RegExpNode* on_success); |
| 1825 | virtual RegExpCharacterClass* AsCharacterClass(); |
| 1826 | virtual bool IsCharacterClass(); |
| 1827 | virtual bool IsTextElement() { return true; } |
| 1828 | virtual int min_match() { return 1; } |
| 1829 | virtual int max_match() { return 1; } |
| 1830 | virtual void AppendToText(RegExpText* text); |
| 1831 | CharacterSet character_set() { return set_; } |
| 1832 | // TODO(lrn): Remove need for complex version if is_standard that |
| 1833 | // recognizes a mangled standard set and just do { return set_.is_special(); } |
| 1834 | bool is_standard(); |
| 1835 | // Returns a value representing the standard character set if is_standard() |
| 1836 | // returns true. |
| 1837 | // Currently used values are: |
| 1838 | // s : unicode whitespace |
| 1839 | // S : unicode non-whitespace |
| 1840 | // w : ASCII word character (digit, letter, underscore) |
| 1841 | // W : non-ASCII word character |
| 1842 | // d : ASCII digit |
| 1843 | // D : non-ASCII digit |
| 1844 | // . : non-unicode non-newline |
| 1845 | // * : All characters |
| 1846 | uc16 standard_type() { return set_.standard_set_type(); } |
| 1847 | ZoneList<CharacterRange>* ranges() { return set_.ranges(); } |
| 1848 | bool is_negated() { return is_negated_; } |
| 1849 | private: |
| 1850 | CharacterSet set_; |
| 1851 | bool is_negated_; |
| 1852 | }; |
| 1853 | |
| 1854 | |
| 1855 | class RegExpAtom: public RegExpTree { |
| 1856 | public: |
| 1857 | explicit RegExpAtom(Vector<const uc16> data) : data_(data) { } |
| 1858 | virtual void* Accept(RegExpVisitor* visitor, void* data); |
| 1859 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 1860 | RegExpNode* on_success); |
| 1861 | virtual RegExpAtom* AsAtom(); |
| 1862 | virtual bool IsAtom(); |
| 1863 | virtual bool IsTextElement() { return true; } |
| 1864 | virtual int min_match() { return data_.length(); } |
| 1865 | virtual int max_match() { return data_.length(); } |
| 1866 | virtual void AppendToText(RegExpText* text); |
| 1867 | Vector<const uc16> data() { return data_; } |
| 1868 | int length() { return data_.length(); } |
| 1869 | private: |
| 1870 | Vector<const uc16> data_; |
| 1871 | }; |
| 1872 | |
| 1873 | |
| 1874 | class RegExpText: public RegExpTree { |
| 1875 | public: |
| 1876 | RegExpText() : elements_(2), length_(0) {} |
| 1877 | virtual void* Accept(RegExpVisitor* visitor, void* data); |
| 1878 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 1879 | RegExpNode* on_success); |
| 1880 | virtual RegExpText* AsText(); |
| 1881 | virtual bool IsText(); |
| 1882 | virtual bool IsTextElement() { return true; } |
| 1883 | virtual int min_match() { return length_; } |
| 1884 | virtual int max_match() { return length_; } |
| 1885 | virtual void AppendToText(RegExpText* text); |
| 1886 | void AddElement(TextElement elm) { |
| 1887 | elements_.Add(elm); |
| 1888 | length_ += elm.length(); |
| 1889 | }; |
| 1890 | ZoneList<TextElement>* elements() { return &elements_; } |
| 1891 | private: |
| 1892 | ZoneList<TextElement> elements_; |
| 1893 | int length_; |
| 1894 | }; |
| 1895 | |
| 1896 | |
| 1897 | class RegExpQuantifier: public RegExpTree { |
| 1898 | public: |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1899 | enum Type { GREEDY, NON_GREEDY, POSSESSIVE }; |
| 1900 | RegExpQuantifier(int min, int max, Type type, RegExpTree* body) |
| 1901 | : body_(body), |
| 1902 | min_(min), |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1903 | max_(max), |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1904 | min_match_(min * body->min_match()), |
| 1905 | type_(type) { |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1906 | if (max > 0 && body->max_match() > kInfinity / max) { |
| 1907 | max_match_ = kInfinity; |
| 1908 | } else { |
| 1909 | max_match_ = max * body->max_match(); |
| 1910 | } |
| 1911 | } |
| 1912 | virtual void* Accept(RegExpVisitor* visitor, void* data); |
| 1913 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 1914 | RegExpNode* on_success); |
| 1915 | static RegExpNode* ToNode(int min, |
| 1916 | int max, |
| 1917 | bool is_greedy, |
| 1918 | RegExpTree* body, |
| 1919 | RegExpCompiler* compiler, |
| 1920 | RegExpNode* on_success, |
| 1921 | bool not_at_start = false); |
| 1922 | virtual RegExpQuantifier* AsQuantifier(); |
| 1923 | virtual Interval CaptureRegisters(); |
| 1924 | virtual bool IsQuantifier(); |
| 1925 | virtual int min_match() { return min_match_; } |
| 1926 | virtual int max_match() { return max_match_; } |
| 1927 | int min() { return min_; } |
| 1928 | int max() { return max_; } |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1929 | bool is_possessive() { return type_ == POSSESSIVE; } |
| 1930 | bool is_non_greedy() { return type_ == NON_GREEDY; } |
| 1931 | bool is_greedy() { return type_ == GREEDY; } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1932 | RegExpTree* body() { return body_; } |
| 1933 | private: |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1934 | RegExpTree* body_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1935 | int min_; |
| 1936 | int max_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1937 | int min_match_; |
| 1938 | int max_match_; |
Leon Clarke | e46be81 | 2010-01-19 14:06:41 +0000 | [diff] [blame] | 1939 | Type type_; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1940 | }; |
| 1941 | |
| 1942 | |
| 1943 | class RegExpCapture: public RegExpTree { |
| 1944 | public: |
| 1945 | explicit RegExpCapture(RegExpTree* body, int index) |
| 1946 | : body_(body), index_(index) { } |
| 1947 | virtual void* Accept(RegExpVisitor* visitor, void* data); |
| 1948 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 1949 | RegExpNode* on_success); |
| 1950 | static RegExpNode* ToNode(RegExpTree* body, |
| 1951 | int index, |
| 1952 | RegExpCompiler* compiler, |
| 1953 | RegExpNode* on_success); |
| 1954 | virtual RegExpCapture* AsCapture(); |
| 1955 | virtual bool IsAnchored(); |
| 1956 | virtual Interval CaptureRegisters(); |
| 1957 | virtual bool IsCapture(); |
| 1958 | virtual int min_match() { return body_->min_match(); } |
| 1959 | virtual int max_match() { return body_->max_match(); } |
| 1960 | RegExpTree* body() { return body_; } |
| 1961 | int index() { return index_; } |
| 1962 | static int StartRegister(int index) { return index * 2; } |
| 1963 | static int EndRegister(int index) { return index * 2 + 1; } |
| 1964 | private: |
| 1965 | RegExpTree* body_; |
| 1966 | int index_; |
| 1967 | }; |
| 1968 | |
| 1969 | |
| 1970 | class RegExpLookahead: public RegExpTree { |
| 1971 | public: |
| 1972 | RegExpLookahead(RegExpTree* body, |
| 1973 | bool is_positive, |
| 1974 | int capture_count, |
| 1975 | int capture_from) |
| 1976 | : body_(body), |
| 1977 | is_positive_(is_positive), |
| 1978 | capture_count_(capture_count), |
| 1979 | capture_from_(capture_from) { } |
| 1980 | |
| 1981 | virtual void* Accept(RegExpVisitor* visitor, void* data); |
| 1982 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 1983 | RegExpNode* on_success); |
| 1984 | virtual RegExpLookahead* AsLookahead(); |
| 1985 | virtual Interval CaptureRegisters(); |
| 1986 | virtual bool IsLookahead(); |
| 1987 | virtual bool IsAnchored(); |
| 1988 | virtual int min_match() { return 0; } |
| 1989 | virtual int max_match() { return 0; } |
| 1990 | RegExpTree* body() { return body_; } |
| 1991 | bool is_positive() { return is_positive_; } |
| 1992 | int capture_count() { return capture_count_; } |
| 1993 | int capture_from() { return capture_from_; } |
| 1994 | private: |
| 1995 | RegExpTree* body_; |
| 1996 | bool is_positive_; |
| 1997 | int capture_count_; |
| 1998 | int capture_from_; |
| 1999 | }; |
| 2000 | |
| 2001 | |
| 2002 | class RegExpBackReference: public RegExpTree { |
| 2003 | public: |
| 2004 | explicit RegExpBackReference(RegExpCapture* capture) |
| 2005 | : capture_(capture) { } |
| 2006 | virtual void* Accept(RegExpVisitor* visitor, void* data); |
| 2007 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 2008 | RegExpNode* on_success); |
| 2009 | virtual RegExpBackReference* AsBackReference(); |
| 2010 | virtual bool IsBackReference(); |
| 2011 | virtual int min_match() { return 0; } |
| 2012 | virtual int max_match() { return capture_->max_match(); } |
| 2013 | int index() { return capture_->index(); } |
| 2014 | RegExpCapture* capture() { return capture_; } |
| 2015 | private: |
| 2016 | RegExpCapture* capture_; |
| 2017 | }; |
| 2018 | |
| 2019 | |
| 2020 | class RegExpEmpty: public RegExpTree { |
| 2021 | public: |
| 2022 | RegExpEmpty() { } |
| 2023 | virtual void* Accept(RegExpVisitor* visitor, void* data); |
| 2024 | virtual RegExpNode* ToNode(RegExpCompiler* compiler, |
| 2025 | RegExpNode* on_success); |
| 2026 | virtual RegExpEmpty* AsEmpty(); |
| 2027 | virtual bool IsEmpty(); |
| 2028 | virtual int min_match() { return 0; } |
| 2029 | virtual int max_match() { return 0; } |
| 2030 | static RegExpEmpty* GetInstance() { return &kInstance; } |
| 2031 | private: |
| 2032 | static RegExpEmpty kInstance; |
| 2033 | }; |
| 2034 | |
| 2035 | |
| 2036 | // ---------------------------------------------------------------------------- |
| 2037 | // Basic visitor |
| 2038 | // - leaf node visitors are abstract. |
| 2039 | |
| 2040 | class AstVisitor BASE_EMBEDDED { |
| 2041 | public: |
| 2042 | AstVisitor() : stack_overflow_(false) { } |
| 2043 | virtual ~AstVisitor() { } |
| 2044 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2045 | // Stack overflow check and dynamic dispatch. |
| 2046 | void Visit(AstNode* node) { if (!CheckStackOverflow()) node->Accept(this); } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2047 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2048 | // Iteration left-to-right. |
Steve Block | 3ce2e20 | 2009-11-05 08:53:23 +0000 | [diff] [blame] | 2049 | virtual void VisitDeclarations(ZoneList<Declaration*>* declarations); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2050 | virtual void VisitStatements(ZoneList<Statement*>* statements); |
| 2051 | virtual void VisitExpressions(ZoneList<Expression*>* expressions); |
| 2052 | |
| 2053 | // Stack overflow tracking support. |
| 2054 | bool HasStackOverflow() const { return stack_overflow_; } |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2055 | bool CheckStackOverflow(); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2056 | |
| 2057 | // If a stack-overflow exception is encountered when visiting a |
| 2058 | // node, calling SetStackOverflow will make sure that the visitor |
| 2059 | // bails out without visiting more nodes. |
| 2060 | void SetStackOverflow() { stack_overflow_ = true; } |
| 2061 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2062 | // Individual nodes |
| 2063 | #define DEF_VISIT(type) \ |
| 2064 | virtual void Visit##type(type* node) = 0; |
| 2065 | AST_NODE_LIST(DEF_VISIT) |
| 2066 | #undef DEF_VISIT |
| 2067 | |
| 2068 | private: |
| 2069 | bool stack_overflow_; |
| 2070 | }; |
| 2071 | |
| 2072 | |
Steve Block | 6ded16b | 2010-05-10 14:33:55 +0100 | [diff] [blame] | 2073 | class CopyAstVisitor : public AstVisitor { |
| 2074 | public: |
| 2075 | Expression* DeepCopyExpr(Expression* expr); |
| 2076 | |
| 2077 | Statement* DeepCopyStmt(Statement* stmt); |
| 2078 | |
| 2079 | private: |
| 2080 | ZoneList<Expression*>* DeepCopyExprList(ZoneList<Expression*>* expressions); |
| 2081 | |
| 2082 | ZoneList<Statement*>* DeepCopyStmtList(ZoneList<Statement*>* statements); |
| 2083 | |
| 2084 | // AST node visit functions. |
| 2085 | #define DECLARE_VISIT(type) virtual void Visit##type(type* node); |
| 2086 | AST_NODE_LIST(DECLARE_VISIT) |
| 2087 | #undef DECLARE_VISIT |
| 2088 | |
| 2089 | // Holds the result of copying an expression. |
| 2090 | Expression* expr_; |
| 2091 | // Holds the result of copying a statement. |
| 2092 | Statement* stmt_; |
| 2093 | }; |
| 2094 | |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 2095 | } } // namespace v8::internal |
| 2096 | |
| 2097 | #endif // V8_AST_H_ |