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// Copyright 2014 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/compiler/all-nodes.h"
#include "src/compiler/graph.h"
namespace v8 {
namespace internal {
namespace compiler {
AllNodes::AllNodes(Zone* local_zone, const Graph* graph, bool only_inputs)
: reachable(local_zone),
is_reachable_(graph->NodeCount(), false, local_zone),
only_inputs_(only_inputs) {
Mark(local_zone, graph->end(), graph);
}
AllNodes::AllNodes(Zone* local_zone, Node* end, const Graph* graph,
bool only_inputs)
: reachable(local_zone),
is_reachable_(graph->NodeCount(), false, local_zone),
only_inputs_(only_inputs) {
Mark(local_zone, end, graph);
}
void AllNodes::Mark(Zone* local_zone, Node* end, const Graph* graph) {
DCHECK_LT(end->id(), graph->NodeCount());
is_reachable_[end->id()] = true;
reachable.push_back(end);
// Find all nodes reachable from {end}.
for (size_t i = 0; i < reachable.size(); i++) {
for (Node* const input : reachable[i]->inputs()) {
if (input == nullptr) {
// TODO(titzer): print a warning.
continue;
}
if (!is_reachable_[input->id()]) {
is_reachable_[input->id()] = true;
reachable.push_back(input);
}
}
if (!only_inputs_) {
for (Node* use : reachable[i]->uses()) {
if (use == nullptr || use->id() >= graph->NodeCount()) {
continue;
}
if (!is_reachable_[use->id()]) {
is_reachable_[use->id()] = true;
reachable.push_back(use);
}
}
}
}
}
} // namespace compiler
} // namespace internal
} // namespace v8
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