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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 "src/compiler/code-generator.h" | 5 #include "src/compiler/code-generator.h" |
6 | 6 |
7 #include "src/ast/scopes.h" | 7 #include "src/ast/scopes.h" |
8 #include "src/compiler/code-generator-impl.h" | 8 #include "src/compiler/code-generator-impl.h" |
9 #include "src/compiler/gap-resolver.h" | 9 #include "src/compiler/gap-resolver.h" |
10 #include "src/compiler/node-matchers.h" | 10 #include "src/compiler/node-matchers.h" |
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1448 // | FP | RET | args | caller frame | | 1448 // | FP | RET | args | caller frame | |
1449 // ^ esp,ebp | 1449 // ^ esp,ebp |
1450 | 1450 |
1451 // --{ pop ebp }---------------------------------------------------------------- | 1451 // --{ pop ebp }---------------------------------------------------------------- |
1452 // | RET | args | caller frame | | 1452 // | RET | args | caller frame | |
1453 // ^ esp ^ ebp | 1453 // ^ esp ^ ebp |
1454 | 1454 |
1455 | 1455 |
1456 void CodeGenerator::AssemblePrologue() { | 1456 void CodeGenerator::AssemblePrologue() { |
1457 CallDescriptor* descriptor = linkage()->GetIncomingDescriptor(); | 1457 CallDescriptor* descriptor = linkage()->GetIncomingDescriptor(); |
1458 if (descriptor->IsCFunctionCall()) { | 1458 if (this->info()->GeneratePreagedPrologue()) { |
1459 // TODO(turbofan): this prologue is redundant with OSR, but still needed for | |
1460 // code aging. | |
1461 DCHECK(frame()->needs_frame()); | |
1462 DCHECK((descriptor->flags() & CallDescriptor::kHasStandardFrameHeader) != | |
1463 0); | |
1464 __ call(isolate()->builtins()->MarkCodeAsExecutedOnce(), | |
1465 RelocInfo::CODE_AGE_SEQUENCE); | |
1466 __ Nop(kNoCodeAgeSequenceLength - | |
1467 v8::internal::Assembler::kCallInstructionLength); | |
1468 } else if (frame()->needs_frame()) { | |
1459 // Assemble a prologue similar the to cdecl calling convention. | 1469 // Assemble a prologue similar the to cdecl calling convention. |
Michael Starzinger
2016/02/23 10:57:33
nit: Comment is outdated, it follows our internal
danno
2016/03/07 09:33:38
Done.
| |
1460 __ push(ebp); | 1470 __ push(ebp); |
1461 __ mov(ebp, esp); | 1471 __ mov(ebp, esp); |
1462 } else if (descriptor->IsJSFunctionCall()) { | 1472 if ((descriptor->flags() & CallDescriptor::kHasStandardFrameHeader) != 0) { |
1463 // TODO(turbofan): this prologue is redundant with OSR, but still needed for | 1473 __ push(esi); |
1464 // code aging. | 1474 __ push(edi); |
1465 __ Prologue(this->info()->GeneratePreagedPrologue()); | 1475 } else { |
1466 } else if (frame()->needs_frame()) { | 1476 __ push(Immediate(Smi::FromInt(StackFrame::STUB))); |
1467 __ StubPrologue(); | 1477 } |
1468 } else { | 1478 } else { |
1469 frame()->SetElidedFrameSizeInSlots(kPCOnStackSize / kPointerSize); | 1479 frame()->SetElidedFrameSizeInSlots(kPCOnStackSize / kPointerSize); |
1470 } | 1480 } |
1471 frame_access_state()->SetFrameAccessToDefault(); | 1481 frame_access_state()->SetFrameAccessToDefault(); |
1472 | 1482 |
1473 int stack_shrink_slots = frame()->GetSpillSlotCount(); | 1483 int stack_shrink_slots = frame()->GetSpillSlotCount(); |
1474 if (info()->is_osr()) { | 1484 if (info()->is_osr()) { |
1475 // TurboFan OSR-compiled functions cannot be entered directly. | 1485 // TurboFan OSR-compiled functions cannot be entered directly. |
1476 __ Abort(kShouldNotDirectlyEnterOsrFunction); | 1486 __ Abort(kShouldNotDirectlyEnterOsrFunction); |
1477 | 1487 |
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1735 int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc; | 1745 int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc; |
1736 __ Nop(padding_size); | 1746 __ Nop(padding_size); |
1737 } | 1747 } |
1738 } | 1748 } |
1739 | 1749 |
1740 #undef __ | 1750 #undef __ |
1741 | 1751 |
1742 } // namespace compiler | 1752 } // namespace compiler |
1743 } // namespace internal | 1753 } // namespace internal |
1744 } // namespace v8 | 1754 } // namespace v8 |
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