// Copyright 2016 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 "src/compiler/bytecode-liveness-map.h"
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namespace v8 {
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namespace internal {
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namespace compiler {
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BytecodeLiveness::BytecodeLiveness(int register_count, Zone* zone)
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: in(new (zone) BytecodeLivenessState(register_count, zone)),
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out(new (zone) BytecodeLivenessState(register_count, zone)) {}
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BytecodeLivenessMap::BytecodeLivenessMap(int bytecode_size, Zone* zone)
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: liveness_map_(base::bits::RoundUpToPowerOfTwo32(bytecode_size / 4 + 1),
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base::KeyEqualityMatcher<int>(),
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ZoneAllocationPolicy(zone)) {}
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uint32_t OffsetHash(int offset) { return offset; }
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BytecodeLiveness& BytecodeLivenessMap::InitializeLiveness(int offset,
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int register_count,
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Zone* zone) {
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return liveness_map_
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.LookupOrInsert(offset, OffsetHash(offset),
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[&]() { return BytecodeLiveness(register_count, zone); },
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ZoneAllocationPolicy(zone))
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->value;
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}
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BytecodeLiveness& BytecodeLivenessMap::GetLiveness(int offset) {
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return liveness_map_.Lookup(offset, OffsetHash(offset))->value;
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}
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const BytecodeLiveness& BytecodeLivenessMap::GetLiveness(int offset) const {
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return liveness_map_.Lookup(offset, OffsetHash(offset))->value;
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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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