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52 lines
1.9 KiB
52 lines
1.9 KiB
4 months ago
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/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_COMPILER_OPTIMIZING_LINEAR_ORDER_H_
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#define ART_COMPILER_OPTIMIZING_LINEAR_ORDER_H_
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#include <type_traits>
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#include "nodes.h"
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namespace art {
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void LinearizeGraphInternal(const HGraph* graph, ArrayRef<HBasicBlock*> linear_order);
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// Linearizes the 'graph' such that:
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// (1): a block is always after its dominator,
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// (2): blocks of loops are contiguous.
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//
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// Storage is obtained through 'allocator' and the linear order it computed
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// into 'linear_order'. Once computed, iteration can be expressed as:
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//
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// for (HBasicBlock* block : linear_order) // linear order
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//
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// for (HBasicBlock* block : ReverseRange(linear_order)) // linear post order
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//
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template <typename Vector>
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void LinearizeGraph(const HGraph* graph, Vector* linear_order) {
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static_assert(std::is_same<HBasicBlock*, typename Vector::value_type>::value,
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"Vector::value_type must be HBasicBlock*.");
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// Resize the vector and pass an ArrayRef<> to internal implementation which is shared
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// for all kinds of vectors, i.e. ArenaVector<> or ScopedArenaVector<>.
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linear_order->resize(graph->GetReversePostOrder().size());
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LinearizeGraphInternal(graph, ArrayRef<HBasicBlock*>(*linear_order));
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}
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} // namespace art
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#endif // ART_COMPILER_OPTIMIZING_LINEAR_ORDER_H_
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