Matthew Gharrity | 5d6e27d | 2016-07-18 13:38:44 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #ifndef ART_COMPILER_OPTIMIZING_REGISTER_ALLOCATION_RESOLVER_H_ |
| 18 | #define ART_COMPILER_OPTIMIZING_REGISTER_ALLOCATION_RESOLVER_H_ |
| 19 | |
| 20 | #include "base/arena_containers.h" |
David Brazdil | d9c9037 | 2016-09-14 16:53:55 +0100 | [diff] [blame^] | 21 | #include "base/array_ref.h" |
Matthew Gharrity | 5d6e27d | 2016-07-18 13:38:44 -0700 | [diff] [blame] | 22 | #include "base/value_object.h" |
| 23 | #include "primitive.h" |
| 24 | |
| 25 | namespace art { |
| 26 | |
| 27 | class ArenaAllocator; |
| 28 | class CodeGenerator; |
| 29 | class HBasicBlock; |
| 30 | class HInstruction; |
| 31 | class HParallelMove; |
| 32 | class LiveInterval; |
| 33 | class Location; |
| 34 | class SsaLivenessAnalysis; |
| 35 | |
| 36 | /** |
| 37 | * Reconciles the locations assigned to live intervals with the location |
| 38 | * summary of each instruction, and inserts moves to resolve split intervals, |
| 39 | * nonlinear control flow, and phi inputs. |
| 40 | */ |
| 41 | class RegisterAllocationResolver : ValueObject { |
| 42 | public: |
| 43 | RegisterAllocationResolver(ArenaAllocator* allocator, |
| 44 | CodeGenerator* codegen, |
| 45 | const SsaLivenessAnalysis& liveness); |
| 46 | |
Vladimir Marko | 70e9746 | 2016-08-09 11:04:26 +0100 | [diff] [blame] | 47 | void Resolve(ArrayRef<HInstruction* const> safepoints, |
Matthew Gharrity | 5d6e27d | 2016-07-18 13:38:44 -0700 | [diff] [blame] | 48 | size_t reserved_out_slots, // Includes slot(s) for the art method. |
| 49 | size_t int_spill_slots, |
| 50 | size_t long_spill_slots, |
| 51 | size_t float_spill_slots, |
| 52 | size_t double_spill_slots, |
| 53 | size_t catch_phi_spill_slots, |
Matthew Gharrity | 0b110f4 | 2016-07-20 10:13:45 -0700 | [diff] [blame] | 54 | const ArenaVector<LiveInterval*>& temp_intervals); |
Matthew Gharrity | 5d6e27d | 2016-07-18 13:38:44 -0700 | [diff] [blame] | 55 | |
| 56 | private: |
Vladimir Marko | 70e9746 | 2016-08-09 11:04:26 +0100 | [diff] [blame] | 57 | // Update live registers of safepoint location summary. |
| 58 | void UpdateSafepointLiveRegisters(); |
| 59 | |
| 60 | // Calculate the maximum size of the spill area for safepoints. |
| 61 | size_t CalculateMaximumSafepointSpillSize(ArrayRef<HInstruction* const> safepoints); |
| 62 | |
Matthew Gharrity | 5d6e27d | 2016-07-18 13:38:44 -0700 | [diff] [blame] | 63 | // Connect adjacent siblings within blocks, and resolve inputs along the way. |
Vladimir Marko | 70e9746 | 2016-08-09 11:04:26 +0100 | [diff] [blame] | 64 | void ConnectSiblings(LiveInterval* interval); |
Matthew Gharrity | 5d6e27d | 2016-07-18 13:38:44 -0700 | [diff] [blame] | 65 | |
| 66 | // Connect siblings between block entries and exits. |
| 67 | void ConnectSplitSiblings(LiveInterval* interval, HBasicBlock* from, HBasicBlock* to) const; |
| 68 | |
| 69 | // Helper methods for inserting parallel moves in the graph. |
| 70 | void InsertParallelMoveAtExitOf(HBasicBlock* block, |
| 71 | HInstruction* instruction, |
| 72 | Location source, |
| 73 | Location destination) const; |
| 74 | void InsertParallelMoveAtEntryOf(HBasicBlock* block, |
| 75 | HInstruction* instruction, |
| 76 | Location source, |
| 77 | Location destination) const; |
| 78 | void InsertMoveAfter(HInstruction* instruction, Location source, Location destination) const; |
| 79 | void AddInputMoveFor(HInstruction* input, |
| 80 | HInstruction* user, |
| 81 | Location source, |
| 82 | Location destination) const; |
| 83 | void InsertParallelMoveAt(size_t position, |
| 84 | HInstruction* instruction, |
| 85 | Location source, |
| 86 | Location destination) const; |
| 87 | void AddMove(HParallelMove* move, |
| 88 | Location source, |
| 89 | Location destination, |
| 90 | HInstruction* instruction, |
| 91 | Primitive::Type type) const; |
| 92 | |
| 93 | ArenaAllocator* const allocator_; |
| 94 | CodeGenerator* const codegen_; |
| 95 | const SsaLivenessAnalysis& liveness_; |
| 96 | |
| 97 | DISALLOW_COPY_AND_ASSIGN(RegisterAllocationResolver); |
| 98 | }; |
| 99 | |
| 100 | } // namespace art |
| 101 | |
| 102 | #endif // ART_COMPILER_OPTIMIZING_REGISTER_ALLOCATION_RESOLVER_H_ |