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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 #if V8_TARGET_ARCH_X64 | 7 #if V8_TARGET_ARCH_X64 |
8 | 8 |
9 #include "src/code-stubs.h" | 9 #include "src/code-stubs.h" |
10 #include "src/codegen.h" | 10 #include "src/codegen.h" |
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1245 } | 1245 } |
1246 | 1246 |
1247 | 1247 |
1248 void FullCodeGenerator::VisitForOfStatement(ForOfStatement* stmt) { | 1248 void FullCodeGenerator::VisitForOfStatement(ForOfStatement* stmt) { |
1249 Comment cmnt(masm_, "[ ForOfStatement"); | 1249 Comment cmnt(masm_, "[ ForOfStatement"); |
1250 SetStatementPosition(stmt); | 1250 SetStatementPosition(stmt); |
1251 | 1251 |
1252 Iteration loop_statement(this, stmt); | 1252 Iteration loop_statement(this, stmt); |
1253 increment_loop_depth(); | 1253 increment_loop_depth(); |
1254 | 1254 |
1255 // var iterator = iterable[@@iterator]() | 1255 // var iterable = subject |
1256 VisitForAccumulatorValue(stmt->assign_iterator()); | 1256 VisitForAccumulatorValue(stmt->assign_iterable()); |
1257 | 1257 |
1258 // As with for-in, skip the loop if the iterator is null or undefined. | 1258 // As with for-in, skip the loop if the iterable is null or undefined. |
1259 __ CompareRoot(rax, Heap::kUndefinedValueRootIndex); | 1259 __ CompareRoot(rax, Heap::kUndefinedValueRootIndex); |
1260 __ j(equal, loop_statement.break_label()); | 1260 __ j(equal, loop_statement.break_label()); |
1261 __ CompareRoot(rax, Heap::kNullValueRootIndex); | 1261 __ CompareRoot(rax, Heap::kNullValueRootIndex); |
1262 __ j(equal, loop_statement.break_label()); | 1262 __ j(equal, loop_statement.break_label()); |
1263 | 1263 |
1264 // Convert the iterator to a JS object. | 1264 // var iterator = iterable[Symbol.iterator](); |
1265 Label convert, done_convert; | 1265 VisitForEffect(stmt->assign_iterator()); |
1266 __ JumpIfSmi(rax, &convert); | |
1267 __ CmpObjectType(rax, FIRST_SPEC_OBJECT_TYPE, rcx); | |
1268 __ j(above_equal, &done_convert); | |
1269 __ bind(&convert); | |
1270 __ Push(rax); | |
1271 __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION); | |
1272 __ bind(&done_convert); | |
1273 | 1266 |
1274 // Loop entry. | 1267 // Loop entry. |
1275 __ bind(loop_statement.continue_label()); | 1268 __ bind(loop_statement.continue_label()); |
1276 | 1269 |
1277 // result = iterator.next() | 1270 // result = iterator.next() |
1278 VisitForEffect(stmt->next_result()); | 1271 VisitForEffect(stmt->next_result()); |
1279 | 1272 |
1280 // if (result.done) break; | 1273 // if (result.done) break; |
1281 Label result_not_done; | 1274 Label result_not_done; |
1282 VisitForControl(stmt->result_done(), | 1275 VisitForControl(stmt->result_done(), |
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4810 ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), | 4803 ASSERT_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), |
4811 Assembler::target_address_at(call_target_address, | 4804 Assembler::target_address_at(call_target_address, |
4812 unoptimized_code)); | 4805 unoptimized_code)); |
4813 return OSR_AFTER_STACK_CHECK; | 4806 return OSR_AFTER_STACK_CHECK; |
4814 } | 4807 } |
4815 | 4808 |
4816 | 4809 |
4817 } } // namespace v8::internal | 4810 } } // namespace v8::internal |
4818 | 4811 |
4819 #endif // V8_TARGET_ARCH_X64 | 4812 #endif // V8_TARGET_ARCH_X64 |
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