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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 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 "v8.h" | 5 #include "v8.h" |
6 | 6 |
7 #include "lithium-allocator-inl.h" | 7 #include "lithium-allocator-inl.h" |
8 #include "arm64/lithium-arm64.h" | 8 #include "arm64/lithium-arm64.h" |
9 #include "arm64/lithium-codegen-arm64.h" | 9 #include "arm64/lithium-codegen-arm64.h" |
10 #include "hydrogen-osr.h" | 10 #include "hydrogen-osr.h" |
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674 // Make sure that the lithium instruction has either no fixed register | 674 // Make sure that the lithium instruction has either no fixed register |
675 // constraints in temps or the result OR no uses that are only used at | 675 // constraints in temps or the result OR no uses that are only used at |
676 // start. If this invariant doesn't hold, the register allocator can decide | 676 // start. If this invariant doesn't hold, the register allocator can decide |
677 // to insert a split of a range immediately before the instruction due to an | 677 // to insert a split of a range immediately before the instruction due to an |
678 // already allocated register needing to be used for the instruction's fixed | 678 // already allocated register needing to be used for the instruction's fixed |
679 // register constraint. In this case, the register allocator won't see an | 679 // register constraint. In this case, the register allocator won't see an |
680 // interference between the split child and the use-at-start (it would if | 680 // interference between the split child and the use-at-start (it would if |
681 // the it was just a plain use), so it is free to move the split child into | 681 // the it was just a plain use), so it is free to move the split child into |
682 // the same register that is used for the use-at-start. | 682 // the same register that is used for the use-at-start. |
683 // See https://code.google.com/p/chromium/issues/detail?id=201590 | 683 // See https://code.google.com/p/chromium/issues/detail?id=201590 |
684 if (!(instr->ClobbersRegisters() && instr->ClobbersDoubleRegisters())) { | 684 if (!(instr->ClobbersRegisters() && |
| 685 instr->ClobbersDoubleRegisters(isolate()))) { |
685 int fixed = 0; | 686 int fixed = 0; |
686 int used_at_start = 0; | 687 int used_at_start = 0; |
687 for (UseIterator it(instr); !it.Done(); it.Advance()) { | 688 for (UseIterator it(instr); !it.Done(); it.Advance()) { |
688 LUnallocated* operand = LUnallocated::cast(it.Current()); | 689 LUnallocated* operand = LUnallocated::cast(it.Current()); |
689 if (operand->IsUsedAtStart()) ++used_at_start; | 690 if (operand->IsUsedAtStart()) ++used_at_start; |
690 } | 691 } |
691 if (instr->Output() != NULL) { | 692 if (instr->Output() != NULL) { |
692 if (LUnallocated::cast(instr->Output())->HasFixedPolicy()) ++fixed; | 693 if (LUnallocated::cast(instr->Output())->HasFixedPolicy()) ++fixed; |
693 } | 694 } |
694 for (TempIterator it(instr); !it.Done(); it.Advance()) { | 695 for (TempIterator it(instr); !it.Done(); it.Advance()) { |
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2553 | 2554 |
2554 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) { | 2555 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) { |
2555 LOperand* receiver = UseRegister(instr->receiver()); | 2556 LOperand* receiver = UseRegister(instr->receiver()); |
2556 LOperand* function = UseRegister(instr->function()); | 2557 LOperand* function = UseRegister(instr->function()); |
2557 LWrapReceiver* result = new(zone()) LWrapReceiver(receiver, function); | 2558 LWrapReceiver* result = new(zone()) LWrapReceiver(receiver, function); |
2558 return AssignEnvironment(DefineAsRegister(result)); | 2559 return AssignEnvironment(DefineAsRegister(result)); |
2559 } | 2560 } |
2560 | 2561 |
2561 | 2562 |
2562 } } // namespace v8::internal | 2563 } } // namespace v8::internal |
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