| // Copyright 2015 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/interpreter/control-flow-builders.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace interpreter { |
| |
| |
| BreakableControlFlowBuilder::~BreakableControlFlowBuilder() { |
| DCHECK(break_sites_.empty()); |
| } |
| |
| |
| void BreakableControlFlowBuilder::SetBreakTarget(const BytecodeLabel& target) { |
| BindLabels(target, &break_sites_); |
| } |
| |
| |
| void BreakableControlFlowBuilder::EmitJump(ZoneVector<BytecodeLabel>* sites) { |
| sites->push_back(BytecodeLabel()); |
| builder()->Jump(&sites->back()); |
| } |
| |
| |
| void BreakableControlFlowBuilder::EmitJumpIfTrue( |
| ZoneVector<BytecodeLabel>* sites) { |
| sites->push_back(BytecodeLabel()); |
| builder()->JumpIfTrue(&sites->back()); |
| } |
| |
| |
| void BreakableControlFlowBuilder::EmitJumpIfFalse( |
| ZoneVector<BytecodeLabel>* sites) { |
| sites->push_back(BytecodeLabel()); |
| builder()->JumpIfFalse(&sites->back()); |
| } |
| |
| |
| void BreakableControlFlowBuilder::EmitJumpIfUndefined( |
| ZoneVector<BytecodeLabel>* sites) { |
| sites->push_back(BytecodeLabel()); |
| builder()->JumpIfUndefined(&sites->back()); |
| } |
| |
| |
| void BreakableControlFlowBuilder::EmitJumpIfNull( |
| ZoneVector<BytecodeLabel>* sites) { |
| sites->push_back(BytecodeLabel()); |
| builder()->JumpIfNull(&sites->back()); |
| } |
| |
| |
| void BreakableControlFlowBuilder::EmitJump(ZoneVector<BytecodeLabel>* sites, |
| int index) { |
| builder()->Jump(&sites->at(index)); |
| } |
| |
| |
| void BreakableControlFlowBuilder::EmitJumpIfTrue( |
| ZoneVector<BytecodeLabel>* sites, int index) { |
| builder()->JumpIfTrue(&sites->at(index)); |
| } |
| |
| |
| void BreakableControlFlowBuilder::EmitJumpIfFalse( |
| ZoneVector<BytecodeLabel>* sites, int index) { |
| builder()->JumpIfFalse(&sites->at(index)); |
| } |
| |
| |
| void BreakableControlFlowBuilder::BindLabels(const BytecodeLabel& target, |
| ZoneVector<BytecodeLabel>* sites) { |
| for (size_t i = 0; i < sites->size(); i++) { |
| BytecodeLabel& site = sites->at(i); |
| builder()->Bind(target, &site); |
| } |
| sites->clear(); |
| } |
| |
| |
| LoopBuilder::~LoopBuilder() { DCHECK(continue_sites_.empty()); } |
| |
| |
| void LoopBuilder::LoopEnd() { |
| // Loop must have closed form, i.e. all loop elements are within the loop, |
| // the loop header precedes the body and next elements in the loop. |
| DCHECK(loop_header_.is_bound()); |
| builder()->Bind(&loop_end_); |
| SetBreakTarget(loop_end_); |
| if (next_.is_bound()) { |
| DCHECK(!condition_.is_bound() || next_.offset() >= condition_.offset()); |
| SetContinueTarget(next_); |
| } else { |
| DCHECK(condition_.is_bound()); |
| DCHECK_GE(condition_.offset(), loop_header_.offset()); |
| DCHECK_LE(condition_.offset(), loop_end_.offset()); |
| SetContinueTarget(condition_); |
| } |
| } |
| |
| |
| void LoopBuilder::SetContinueTarget(const BytecodeLabel& target) { |
| BindLabels(target, &continue_sites_); |
| } |
| |
| |
| SwitchBuilder::~SwitchBuilder() { |
| #ifdef DEBUG |
| for (auto site : case_sites_) { |
| DCHECK(site.is_bound()); |
| } |
| #endif |
| } |
| |
| |
| void SwitchBuilder::SetCaseTarget(int index) { |
| BytecodeLabel& site = case_sites_.at(index); |
| builder()->Bind(&site); |
| } |
| |
| } // namespace interpreter |
| } // namespace internal |
| } // namespace v8 |