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// 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/compiler/node-marker.h"
#include "src/compiler/graph.h"
#include "src/compiler/node.h"
namespace v8 {
namespace internal {
namespace compiler {
NodeMarkerBase::NodeMarkerBase(Graph* graph, uint32_t num_states)
: mark_min_(graph->mark_max_), mark_max_(graph->mark_max_ += num_states) {
DCHECK(num_states > 0); // user error!
DCHECK(mark_max_ > mark_min_); // check for wraparound.
}
Mark NodeMarkerBase::Get(Node* node) {
Mark mark = node->mark();
if (mark < mark_min_) {
mark = mark_min_;
node->set_mark(mark_min_);
}
DCHECK_LT(mark, mark_max_);
return mark - mark_min_;
}
void NodeMarkerBase::Set(Node* node, Mark mark) {
DCHECK_LT(mark, mark_max_ - mark_min_);
DCHECK_LT(node->mark(), mark_max_);
node->set_mark(mark + mark_min_);
}
} // namespace compiler
} // namespace internal
} // namespace v8
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