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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "src/v8.h" | 5 #include "src/v8.h" |
| 6 | 6 |
| 7 #include "src/rewriter.h" | 7 #include "src/rewriter.h" |
| 8 | 8 |
| 9 #include "src/ast.h" | 9 #include "src/ast.h" |
| 10 #include "src/compiler.h" | 10 #include "src/compiler.h" |
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| 222 #define DEF_VISIT(type) \ | 222 #define DEF_VISIT(type) \ |
| 223 void Processor::Visit##type(type* expr) { UNREACHABLE(); } | 223 void Processor::Visit##type(type* expr) { UNREACHABLE(); } |
| 224 EXPRESSION_NODE_LIST(DEF_VISIT) | 224 EXPRESSION_NODE_LIST(DEF_VISIT) |
| 225 #undef DEF_VISIT | 225 #undef DEF_VISIT |
| 226 | 226 |
| 227 | 227 |
| 228 // Assumes code has been parsed. Mutates the AST, so the AST should not | 228 // Assumes code has been parsed. Mutates the AST, so the AST should not |
| 229 // continue to be used in the case of failure. | 229 // continue to be used in the case of failure. |
| 230 bool Rewriter::Rewrite(CompilationInfo* info) { | 230 bool Rewriter::Rewrite(CompilationInfo* info) { |
| 231 FunctionLiteral* function = info->function(); | 231 FunctionLiteral* function = info->function(); |
| 232 ASSERT(function != NULL); | 232 DCHECK(function != NULL); |
| 233 Scope* scope = function->scope(); | 233 Scope* scope = function->scope(); |
| 234 ASSERT(scope != NULL); | 234 DCHECK(scope != NULL); |
| 235 if (!scope->is_global_scope() && !scope->is_eval_scope()) return true; | 235 if (!scope->is_global_scope() && !scope->is_eval_scope()) return true; |
| 236 | 236 |
| 237 ZoneList<Statement*>* body = function->body(); | 237 ZoneList<Statement*>* body = function->body(); |
| 238 if (!body->is_empty()) { | 238 if (!body->is_empty()) { |
| 239 Variable* result = | 239 Variable* result = |
| 240 scope->NewTemporary(info->ast_value_factory()->dot_result_string()); | 240 scope->NewTemporary(info->ast_value_factory()->dot_result_string()); |
| 241 // The name string must be internalized at this point. | 241 // The name string must be internalized at this point. |
| 242 ASSERT(!result->name().is_null()); | 242 DCHECK(!result->name().is_null()); |
| 243 Processor processor(result, info->zone()); | 243 Processor processor(result, info->zone()); |
| 244 processor.Process(body); | 244 processor.Process(body); |
| 245 if (processor.HasStackOverflow()) return false; | 245 if (processor.HasStackOverflow()) return false; |
| 246 | 246 |
| 247 if (processor.result_assigned()) { | 247 if (processor.result_assigned()) { |
| 248 ASSERT(function->end_position() != RelocInfo::kNoPosition); | 248 DCHECK(function->end_position() != RelocInfo::kNoPosition); |
| 249 // Set the position of the assignment statement one character past the | 249 // Set the position of the assignment statement one character past the |
| 250 // source code, such that it definitely is not in the source code range | 250 // source code, such that it definitely is not in the source code range |
| 251 // of an immediate inner scope. For example in | 251 // of an immediate inner scope. For example in |
| 252 // eval('with ({x:1}) x = 1'); | 252 // eval('with ({x:1}) x = 1'); |
| 253 // the end position of the function generated for executing the eval code | 253 // the end position of the function generated for executing the eval code |
| 254 // coincides with the end of the with scope which is the position of '1'. | 254 // coincides with the end of the with scope which is the position of '1'. |
| 255 int pos = function->end_position(); | 255 int pos = function->end_position(); |
| 256 VariableProxy* result_proxy = processor.factory()->NewVariableProxy( | 256 VariableProxy* result_proxy = processor.factory()->NewVariableProxy( |
| 257 result->raw_name(), false, result->interface(), pos); | 257 result->raw_name(), false, result->interface(), pos); |
| 258 result_proxy->BindTo(result); | 258 result_proxy->BindTo(result); |
| 259 Statement* result_statement = | 259 Statement* result_statement = |
| 260 processor.factory()->NewReturnStatement(result_proxy, pos); | 260 processor.factory()->NewReturnStatement(result_proxy, pos); |
| 261 body->Add(result_statement, info->zone()); | 261 body->Add(result_statement, info->zone()); |
| 262 } | 262 } |
| 263 } | 263 } |
| 264 | 264 |
| 265 return true; | 265 return true; |
| 266 } | 266 } |
| 267 | 267 |
| 268 | 268 |
| 269 } } // namespace v8::internal | 269 } } // namespace v8::internal |
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