Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2015 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 | #ifndef V8_LIVE_RANGE_SEPARATOR_H_ |
| 6 | #define V8_LIVE_RANGE_SEPARATOR_H_ |
| 7 | |
| 8 | |
| 9 | #include <src/zone.h> |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | |
| 13 | class Zone; |
| 14 | |
| 15 | namespace compiler { |
| 16 | |
| 17 | class RegisterAllocationData; |
| 18 | |
| 19 | |
| 20 | // A register allocation pair of transformations: splinter and merge live ranges |
| 21 | class LiveRangeSeparator final : public ZoneObject { |
| 22 | public: |
| 23 | LiveRangeSeparator(RegisterAllocationData* data, Zone* zone) |
| 24 | : data_(data), zone_(zone) {} |
| 25 | |
| 26 | void Splinter(); |
| 27 | |
| 28 | private: |
| 29 | RegisterAllocationData* data() const { return data_; } |
| 30 | Zone* zone() const { return zone_; } |
| 31 | |
| 32 | RegisterAllocationData* const data_; |
| 33 | Zone* const zone_; |
| 34 | |
| 35 | DISALLOW_COPY_AND_ASSIGN(LiveRangeSeparator); |
| 36 | }; |
| 37 | |
| 38 | |
| 39 | class LiveRangeMerger final : public ZoneObject { |
| 40 | public: |
| 41 | LiveRangeMerger(RegisterAllocationData* data, Zone* zone) |
| 42 | : data_(data), zone_(zone) {} |
| 43 | |
| 44 | void Merge(); |
| 45 | |
| 46 | private: |
| 47 | RegisterAllocationData* data() const { return data_; } |
| 48 | Zone* zone() const { return zone_; } |
| 49 | |
| 50 | // Mark ranges spilled in deferred blocks, that also cover non-deferred code. |
| 51 | // We do nothing special for ranges fully contained in deferred blocks, |
| 52 | // because they would "spill in deferred blocks" anyway. |
| 53 | void MarkRangesSpilledInDeferredBlocks(); |
| 54 | |
| 55 | RegisterAllocationData* const data_; |
| 56 | Zone* const zone_; |
| 57 | |
| 58 | DISALLOW_COPY_AND_ASSIGN(LiveRangeMerger); |
| 59 | }; |
| 60 | |
| 61 | |
| 62 | } // namespace compiler |
| 63 | } // namespace internal |
| 64 | } // namespace v8 |
| 65 | #endif // V8_LIVE_RANGE_SEPARATOR_H_ |