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Issue 1899813003: [crankshaft] Fragmentation-free allocation folding. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 4 years, 7 months ago
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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/crankshaft/ia32/lithium-ia32.h" 5 #include "src/crankshaft/ia32/lithium-ia32.h"
6 6
7 #include <sstream> 7 #include <sstream>
8 8
9 #if V8_TARGET_ARCH_IA32 9 #if V8_TARGET_ARCH_IA32
10 10
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2399 LInstruction* LChunkBuilder::DoStringCharFromCode(HStringCharFromCode* instr) { 2399 LInstruction* LChunkBuilder::DoStringCharFromCode(HStringCharFromCode* instr) {
2400 LOperand* char_code = UseRegister(instr->value()); 2400 LOperand* char_code = UseRegister(instr->value());
2401 LOperand* context = UseAny(instr->context()); 2401 LOperand* context = UseAny(instr->context());
2402 LStringCharFromCode* result = 2402 LStringCharFromCode* result =
2403 new(zone()) LStringCharFromCode(context, char_code); 2403 new(zone()) LStringCharFromCode(context, char_code);
2404 return AssignPointerMap(DefineAsRegister(result)); 2404 return AssignPointerMap(DefineAsRegister(result));
2405 } 2405 }
2406 2406
2407 2407
2408 LInstruction* LChunkBuilder::DoAllocate(HAllocate* instr) { 2408 LInstruction* LChunkBuilder::DoAllocate(HAllocate* instr) {
2409 info()->MarkAsDeferredCalling(); 2409 LOperand* size = instr->size()->IsConstant() ? UseConstant(instr->size())
2410 LOperand* context = UseAny(instr->context()); 2410 : UseRegister(instr->size());
2411 LOperand* size = instr->size()->IsConstant() 2411 if (instr->IsAllocationFolded()) {
2412 ? UseConstant(instr->size()) 2412 LOperand* temp = TempRegister();
2413 : UseTempRegister(instr->size()); 2413 LFastAllocate* result = new (zone()) LFastAllocate(size, temp);
2414 LOperand* temp = TempRegister(); 2414 return DefineAsRegister(result);
2415 LAllocate* result = new(zone()) LAllocate(context, size, temp); 2415 } else {
2416 return AssignPointerMap(DefineAsRegister(result)); 2416 info()->MarkAsDeferredCalling();
2417 LOperand* context = UseAny(instr->context());
2418 LOperand* temp = TempRegister();
2419 LAllocate* result = new (zone()) LAllocate(context, size, temp);
2420 return AssignPointerMap(DefineAsRegister(result));
2421 }
2417 } 2422 }
2418 2423
2419 2424
2420 LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) { 2425 LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
2421 DCHECK(argument_count_ == 0); 2426 DCHECK(argument_count_ == 0);
2422 allocator_->MarkAsOsrEntry(); 2427 allocator_->MarkAsOsrEntry();
2423 current_block_->last_environment()->set_ast_id(instr->ast_id()); 2428 current_block_->last_environment()->set_ast_id(instr->ast_id());
2424 return AssignEnvironment(new(zone()) LOsrEntry); 2429 return AssignEnvironment(new(zone()) LOsrEntry);
2425 } 2430 }
2426 2431
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2589 LOperand* index = UseTempRegister(instr->index()); 2594 LOperand* index = UseTempRegister(instr->index());
2590 LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index); 2595 LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index);
2591 LInstruction* result = DefineSameAsFirst(load); 2596 LInstruction* result = DefineSameAsFirst(load);
2592 return AssignPointerMap(result); 2597 return AssignPointerMap(result);
2593 } 2598 }
2594 2599
2595 } // namespace internal 2600 } // namespace internal
2596 } // namespace v8 2601 } // namespace v8
2597 2602
2598 #endif // V8_TARGET_ARCH_IA32 2603 #endif // V8_TARGET_ARCH_IA32
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