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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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1477 // | FP | RET | args | caller frame | | 1477 // | FP | RET | args | caller frame | |
1478 // ^ esp,ebp | 1478 // ^ esp,ebp |
1479 | 1479 |
1480 // --{ pop ebp }---------------------------------------------------------------- | 1480 // --{ pop ebp }---------------------------------------------------------------- |
1481 // | RET | args | caller frame | | 1481 // | RET | args | caller frame | |
1482 // ^ esp ^ ebp | 1482 // ^ esp ^ ebp |
1483 | 1483 |
1484 | 1484 |
1485 void CodeGenerator::AssemblePrologue() { | 1485 void CodeGenerator::AssemblePrologue() { |
1486 CallDescriptor* descriptor = linkage()->GetIncomingDescriptor(); | 1486 CallDescriptor* descriptor = linkage()->GetIncomingDescriptor(); |
1487 if (descriptor->IsCFunctionCall()) { | 1487 if (frame()->needs_frame()) { |
1488 // Assemble a prologue similar the to cdecl calling convention. | 1488 if (descriptor->IsCFunctionCall()) { |
1489 __ push(ebp); | 1489 __ push(ebp); |
1490 __ mov(ebp, esp); | 1490 __ mov(ebp, esp); |
1491 } else if (descriptor->IsJSFunctionCall()) { | 1491 } else if (descriptor->IsJSFunctionCall()) { |
1492 // TODO(turbofan): this prologue is redundant with OSR, but still needed for | 1492 __ Prologue(this->info()->GeneratePreagedPrologue()); |
1493 // code aging. | 1493 } else { |
1494 __ Prologue(this->info()->GeneratePreagedPrologue()); | 1494 __ StubPrologue(info()->GetOutputStackFrameType()); |
1495 } else if (frame()->needs_frame()) { | 1495 } |
1496 __ StubPrologue(); | |
1497 } else { | 1496 } else { |
1498 frame()->SetElidedFrameSizeInSlots(kPCOnStackSize / kPointerSize); | 1497 frame()->SetElidedFrameSizeInSlots(kPCOnStackSize / kPointerSize); |
1499 } | 1498 } |
1500 frame_access_state()->SetFrameAccessToDefault(); | 1499 frame_access_state()->SetFrameAccessToDefault(); |
1501 | 1500 |
1502 int stack_shrink_slots = frame()->GetSpillSlotCount(); | 1501 int stack_shrink_slots = frame()->GetSpillSlotCount(); |
1503 if (info()->is_osr()) { | 1502 if (info()->is_osr()) { |
1504 // TurboFan OSR-compiled functions cannot be entered directly. | 1503 // TurboFan OSR-compiled functions cannot be entered directly. |
1505 __ Abort(kShouldNotDirectlyEnterOsrFunction); | 1504 __ Abort(kShouldNotDirectlyEnterOsrFunction); |
1506 | 1505 |
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1764 int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc; | 1763 int padding_size = last_lazy_deopt_pc_ + space_needed - current_pc; |
1765 __ Nop(padding_size); | 1764 __ Nop(padding_size); |
1766 } | 1765 } |
1767 } | 1766 } |
1768 | 1767 |
1769 #undef __ | 1768 #undef __ |
1770 | 1769 |
1771 } // namespace compiler | 1770 } // namespace compiler |
1772 } // namespace internal | 1771 } // namespace internal |
1773 } // namespace v8 | 1772 } // namespace v8 |
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