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 | BytecodeLiveness::BytecodeLiveness(int register_count, Zone* zone) |
12 | : in(new (zone) BytecodeLivenessState(register_count, zone)), |
13 | out(new (zone) BytecodeLivenessState(register_count, 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 | BytecodeLiveness& BytecodeLivenessMap::InitializeLiveness(int offset, |
23 | int register_count, |
24 | Zone* zone) { |
25 | return liveness_map_ |
26 | .LookupOrInsert(offset, OffsetHash(offset), |
27 | [&]() { return BytecodeLiveness(register_count, zone); }, |
28 | ZoneAllocationPolicy(zone)) |
29 | ->value; |
30 | } |
31 | |
32 | BytecodeLiveness& BytecodeLivenessMap::GetLiveness(int offset) { |
33 | return liveness_map_.Lookup(offset, OffsetHash(offset))->value; |
34 | } |
35 | |
36 | const BytecodeLiveness& BytecodeLivenessMap::GetLiveness(int offset) const { |
37 | return liveness_map_.Lookup(offset, OffsetHash(offset))->value; |
38 | } |
39 | |
40 | } // namespace compiler |
41 | } // namespace internal |
42 | } // namespace v8 |
43 | |