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// Copyright 2013 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 "control-builders.h"
namespace v8 {
namespace internal {
namespace compiler {
void IfBuilder::If(Node* condition, BranchHint hint) {
builder_->NewBranch(condition, hint);
else_environment_ = environment()->CopyForConditional();
}
void IfBuilder::Then() { builder_->NewIfTrue(); }
void IfBuilder::Else() {
builder_->NewMerge();
then_environment_ = environment();
set_environment(else_environment_);
builder_->NewIfFalse();
}
void IfBuilder::End() {
then_environment_->Merge(environment());
set_environment(then_environment_);
}
void LoopBuilder::BeginLoop(BitVector* assigned) {
builder_->NewLoop();
loop_environment_ = environment()->CopyForLoop(assigned);
continue_environment_ = environment()->CopyAsUnreachable();
break_environment_ = environment()->CopyAsUnreachable();
}
void LoopBuilder::Continue() {
continue_environment_->Merge(environment());
environment()->MarkAsUnreachable();
}
void LoopBuilder::Break() {
break_environment_->Merge(environment());
environment()->MarkAsUnreachable();
}
void LoopBuilder::EndBody() {
continue_environment_->Merge(environment());
set_environment(continue_environment_);
}
void LoopBuilder::EndLoop() {
loop_environment_->Merge(environment());
set_environment(break_environment_);
}
void LoopBuilder::BreakUnless(Node* condition) {
IfBuilder control_if(builder_);
control_if.If(condition);
control_if.Then();
control_if.Else();
Break();
control_if.End();
}
void SwitchBuilder::BeginSwitch() {
body_environment_ = environment()->CopyAsUnreachable();
label_environment_ = environment()->CopyAsUnreachable();
break_environment_ = environment()->CopyAsUnreachable();
body_environments_.AddBlock(NULL, case_count(), zone());
}
void SwitchBuilder::BeginLabel(int index, Node* condition) {
builder_->NewBranch(condition);
label_environment_ = environment()->CopyForConditional();
builder_->NewIfTrue();
body_environments_[index] = environment();
}
void SwitchBuilder::EndLabel() {
set_environment(label_environment_);
builder_->NewIfFalse();
}
void SwitchBuilder::DefaultAt(int index) {
label_environment_ = environment()->CopyAsUnreachable();
body_environments_[index] = environment();
}
void SwitchBuilder::BeginCase(int index) {
set_environment(body_environments_[index]);
environment()->Merge(body_environment_);
}
void SwitchBuilder::Break() {
break_environment_->Merge(environment());
environment()->MarkAsUnreachable();
}
void SwitchBuilder::EndCase() { body_environment_ = environment(); }
void SwitchBuilder::EndSwitch() {
break_environment_->Merge(label_environment_);
break_environment_->Merge(environment());
set_environment(break_environment_);
}
void BlockBuilder::BeginBlock() {
break_environment_ = environment()->CopyAsUnreachable();
}
void BlockBuilder::Break() {
break_environment_->Merge(environment());
environment()->MarkAsUnreachable();
}
void BlockBuilder::EndBlock() {
break_environment_->Merge(environment());
set_environment(break_environment_);
}
}
}
} // namespace v8::internal::compiler
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