16928e28d7
Allow reservation of additional input capacity when creating nodes to prevent switching to deque representation when adding well-known additional inputs. Also ensure that only a single temporary buffer is used to create temporary input arrays before allocating nodes. R=mstarzinger@chromium.org Review URL: https://codereview.chromium.org/644083003 Cr-Commit-Position: refs/heads/master@{#24896} git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24896 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "test/cctest/compiler/simplified-graph-builder.h"
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#include "src/compiler/operator-properties.h"
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#include "src/compiler/operator-properties-inl.h"
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namespace v8 {
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namespace internal {
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namespace compiler {
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SimplifiedGraphBuilder::SimplifiedGraphBuilder(
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Graph* graph, CommonOperatorBuilder* common,
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MachineOperatorBuilder* machine, SimplifiedOperatorBuilder* simplified)
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: GraphBuilder(graph),
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effect_(NULL),
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return_(NULL),
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common_(common),
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machine_(machine),
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simplified_(simplified) {}
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void SimplifiedGraphBuilder::Begin(int num_parameters) {
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DCHECK(graph()->start() == NULL);
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Node* start = graph()->NewNode(common()->Start(num_parameters));
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graph()->SetStart(start);
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effect_ = start;
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}
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void SimplifiedGraphBuilder::Return(Node* value) {
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return_ =
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graph()->NewNode(common()->Return(), value, effect_, graph()->start());
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effect_ = NULL;
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}
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void SimplifiedGraphBuilder::End() {
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Node* end = graph()->NewNode(common()->End(), return_);
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graph()->SetEnd(end);
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}
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Node* SimplifiedGraphBuilder::MakeNode(const Operator* op,
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int value_input_count,
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Node** value_inputs, bool incomplete) {
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DCHECK(op->InputCount() == value_input_count);
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DCHECK(!OperatorProperties::HasContextInput(op));
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DCHECK(!OperatorProperties::HasFrameStateInput(op));
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bool has_control = OperatorProperties::GetControlInputCount(op) == 1;
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bool has_effect = OperatorProperties::GetEffectInputCount(op) == 1;
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DCHECK(OperatorProperties::GetControlInputCount(op) < 2);
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DCHECK(OperatorProperties::GetEffectInputCount(op) < 2);
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Node* result = NULL;
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if (!has_control && !has_effect) {
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result = graph()->NewNode(op, value_input_count, value_inputs, incomplete);
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} else {
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int input_count_with_deps = value_input_count;
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if (has_control) ++input_count_with_deps;
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if (has_effect) ++input_count_with_deps;
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Node** buffer = zone()->NewArray<Node*>(input_count_with_deps);
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memcpy(buffer, value_inputs, kPointerSize * value_input_count);
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Node** current_input = buffer + value_input_count;
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if (has_effect) {
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*current_input++ = effect_;
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}
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if (has_control) {
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*current_input++ = graph()->start();
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}
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result = graph()->NewNode(op, input_count_with_deps, buffer, incomplete);
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if (has_effect) {
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effect_ = result;
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}
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if (OperatorProperties::HasControlOutput(result->op())) {
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// This graph builder does not support control flow.
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UNREACHABLE();
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}
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}
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return result;
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}
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} // namespace compiler
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} // namespace internal
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} // namespace v8
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