4f5337a2b6
When compiling on a laptop I like to concatenate the small test files. This makes a big difference to compile times. These changes make that easier. R=ulan@chromium.org BUG= Review URL: https://codereview.chromium.org/1163803002 Cr-Commit-Position: refs/heads/master@{#28742}
104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
// 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 "src/hydrogen.h"
|
|
#include "src/hydrogen-osr.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
|
|
// True iff. we are compiling for OSR and the statement is the entry.
|
|
bool HOsrBuilder::HasOsrEntryAt(IterationStatement* statement) {
|
|
return statement->OsrEntryId() == builder_->current_info()->osr_ast_id();
|
|
}
|
|
|
|
|
|
HBasicBlock* HOsrBuilder::BuildOsrLoopEntry(IterationStatement* statement) {
|
|
DCHECK(HasOsrEntryAt(statement));
|
|
|
|
Zone* zone = builder_->zone();
|
|
HGraph* graph = builder_->graph();
|
|
|
|
// only one OSR point per compile is allowed.
|
|
DCHECK(graph->osr() == NULL);
|
|
|
|
// remember this builder as the one OSR builder in the graph.
|
|
graph->set_osr(this);
|
|
|
|
HBasicBlock* non_osr_entry = graph->CreateBasicBlock();
|
|
osr_entry_ = graph->CreateBasicBlock();
|
|
HValue* true_value = graph->GetConstantTrue();
|
|
HBranch* test = builder_->New<HBranch>(true_value, ToBooleanStub::Types(),
|
|
non_osr_entry, osr_entry_);
|
|
builder_->FinishCurrentBlock(test);
|
|
|
|
HBasicBlock* loop_predecessor = graph->CreateBasicBlock();
|
|
builder_->Goto(non_osr_entry, loop_predecessor);
|
|
|
|
builder_->set_current_block(osr_entry_);
|
|
osr_entry_->set_osr_entry();
|
|
BailoutId osr_entry_id = statement->OsrEntryId();
|
|
|
|
HEnvironment *environment = builder_->environment();
|
|
int first_expression_index = environment->first_expression_index();
|
|
int length = environment->length();
|
|
osr_values_ = new(zone) ZoneList<HUnknownOSRValue*>(length, zone);
|
|
|
|
for (int i = 0; i < first_expression_index; ++i) {
|
|
HUnknownOSRValue* osr_value
|
|
= builder_->Add<HUnknownOSRValue>(environment, i);
|
|
environment->Bind(i, osr_value);
|
|
osr_values_->Add(osr_value, zone);
|
|
}
|
|
|
|
if (first_expression_index != length) {
|
|
environment->Drop(length - first_expression_index);
|
|
for (int i = first_expression_index; i < length; ++i) {
|
|
HUnknownOSRValue* osr_value
|
|
= builder_->Add<HUnknownOSRValue>(environment, i);
|
|
environment->Push(osr_value);
|
|
osr_values_->Add(osr_value, zone);
|
|
}
|
|
}
|
|
|
|
unoptimized_frame_slots_ =
|
|
environment->local_count() + environment->push_count();
|
|
|
|
// Keep a copy of the old environment, since the OSR values need it
|
|
// to figure out where exactly they are located in the unoptimized frame.
|
|
environment = environment->Copy();
|
|
builder_->current_block()->UpdateEnvironment(environment);
|
|
|
|
builder_->Add<HSimulate>(osr_entry_id);
|
|
builder_->Add<HOsrEntry>(osr_entry_id);
|
|
HContext* context = builder_->Add<HContext>();
|
|
environment->BindContext(context);
|
|
builder_->Goto(loop_predecessor);
|
|
loop_predecessor->SetJoinId(statement->EntryId());
|
|
builder_->set_current_block(loop_predecessor);
|
|
|
|
// Create the final loop entry
|
|
osr_loop_entry_ = builder_->BuildLoopEntry();
|
|
return osr_loop_entry_;
|
|
}
|
|
|
|
|
|
void HOsrBuilder::FinishGraph() {
|
|
// do nothing for now.
|
|
}
|
|
|
|
|
|
void HOsrBuilder::FinishOsrValues() {
|
|
const ZoneList<HPhi*>* phis = osr_loop_entry_->phis();
|
|
for (int j = 0; j < phis->length(); j++) {
|
|
HPhi* phi = phis->at(j);
|
|
if (phi->HasMergedIndex()) {
|
|
osr_values_->at(phi->merged_index())->set_incoming_value(phi);
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace internal
|
|
} // namespace v8
|