| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ART_COMPILER_OPTIMIZING_PREPARE_FOR_REGISTER_ALLOCATION_H_ |
| #define ART_COMPILER_OPTIMIZING_PREPARE_FOR_REGISTER_ALLOCATION_H_ |
| |
| #include "nodes.h" |
| |
| namespace art { |
| |
| /** |
| * A simplification pass over the graph before doing register allocation. |
| * For example it changes uses of null checks and bounds checks to the original |
| * objects, to avoid creating a live range for these checks. |
| */ |
| class PrepareForRegisterAllocation : public HGraphDelegateVisitor { |
| public: |
| explicit PrepareForRegisterAllocation(HGraph* graph) : HGraphDelegateVisitor(graph) {} |
| |
| void Run(); |
| |
| static constexpr const char* kPrepareForRegisterAllocationPassName = |
| "prepare_for_register_allocation"; |
| |
| private: |
| void VisitNullCheck(HNullCheck* check) OVERRIDE; |
| void VisitDivZeroCheck(HDivZeroCheck* check) OVERRIDE; |
| void VisitBoundsCheck(HBoundsCheck* check) OVERRIDE; |
| void VisitBoundType(HBoundType* bound_type) OVERRIDE; |
| void VisitClinitCheck(HClinitCheck* check) OVERRIDE; |
| void VisitCondition(HCondition* condition) OVERRIDE; |
| void VisitInvokeStaticOrDirect(HInvokeStaticOrDirect* invoke) OVERRIDE; |
| void VisitNewInstance(HNewInstance* instruction) OVERRIDE; |
| |
| bool CanMoveClinitCheck(HInstruction* input, HInstruction* user) const; |
| bool CanEmitConditionAt(HCondition* condition, HInstruction* user) const; |
| |
| DISALLOW_COPY_AND_ASSIGN(PrepareForRegisterAllocation); |
| }; |
| |
| } // namespace art |
| |
| #endif // ART_COMPILER_OPTIMIZING_PREPARE_FOR_REGISTER_ALLOCATION_H_ |