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/*
* Copyright (C) 2016 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_SCHEDULER_ARM64_H_
#define ART_COMPILER_OPTIMIZING_SCHEDULER_ARM64_H_
#include "base/macros.h"
#include "scheduler.h"
namespace art HIDDEN {
namespace arm64 {
class HSchedulerARM64 : public HScheduler {
public:
explicit HSchedulerARM64(SchedulingNodeSelector* selector)
: HScheduler(selector) {}
~HSchedulerARM64() override {}
bool IsSchedulable(const HInstruction* instruction) const override;
// Treat as scheduling barriers those vector instructions whose live ranges exceed the vectorized
// loop boundaries. This is a workaround for the lack of notion of SIMD register in the compiler;
// around a call we have to save/restore all live SIMD&FP registers (only lower 64 bits of
// SIMD&FP registers are callee saved) so don't reorder such vector instructions.
//
// TODO: remove this when a proper support of SIMD registers is introduced to the compiler.
bool IsSchedulingBarrier(const HInstruction* instr) const override {
return HScheduler::IsSchedulingBarrier(instr) ||
instr->IsVecReduce() ||
instr->IsVecExtractScalar() ||
instr->IsVecSetScalars() ||
instr->IsVecReplicateScalar();
}
protected:
std::pair<SchedulingGraph, ScopedArenaVector<SchedulingNode*>> BuildSchedulingGraph(
HBasicBlock* block,
ScopedArenaAllocator* allocator,
const HeapLocationCollector* heap_location_collector) override;
private:
DISALLOW_COPY_AND_ASSIGN(HSchedulerARM64);
};
} // namespace arm64
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_SCHEDULER_ARM64_H_
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