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| 1 // Copyright 2016 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "src/compiler/bytecode-liveness-map.h" |
| 6 |
| 7 namespace v8 { |
| 8 namespace internal { |
| 9 namespace compiler { |
| 10 |
| 11 Liveness::Liveness(int size, Zone* zone) |
| 12 : in(new (zone) BitVector(size, zone)), |
| 13 out(new (zone) BitVector(size, zone)) {} |
| 14 |
| 15 BytecodeLivenessMap::BytecodeLivenessMap(int bytecode_size, Zone* zone) |
| 16 : liveness_map_(base::bits::RoundUpToPowerOfTwo32(bytecode_size / 4 + 1), |
| 17 base::KeyEqualityMatcher<int>(), |
| 18 ZoneAllocationPolicy(zone)) {} |
| 19 |
| 20 uint32_t OffsetHash(int offset) { return offset; } |
| 21 |
| 22 Liveness& BytecodeLivenessMap::InitializeLiveness(int offset, int size, |
| 23 Zone* zone) { |
| 24 return liveness_map_ |
| 25 .LookupOrInsert(offset, OffsetHash(offset), |
| 26 [&]() { return Liveness(size, zone); }, |
| 27 ZoneAllocationPolicy(zone)) |
| 28 ->value; |
| 29 } |
| 30 |
| 31 Liveness& BytecodeLivenessMap::GetLiveness(int offset) { |
| 32 return liveness_map_.Lookup(offset, OffsetHash(offset))->value; |
| 33 } |
| 34 |
| 35 const Liveness& BytecodeLivenessMap::GetLiveness(int offset) const { |
| 36 return liveness_map_.Lookup(offset, OffsetHash(offset))->value; |
| 37 } |
| 38 |
| 39 } // namespace compiler |
| 40 } // namespace internal |
| 41 } // namespace v8 |
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