45 lines
1.6 KiB
C++
45 lines
1.6 KiB
C++
// Copyright (c) 2017 The Khronos Group Inc.
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// Copyright (c) 2017 Valve Corporation
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// Copyright (c) 2017 LunarG Inc.
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// Copyright (c) 2019 Google LLC
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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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#ifndef SOURCE_OPT_BLOCK_MERGE_UTIL_H_
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#define SOURCE_OPT_BLOCK_MERGE_UTIL_H_
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace opt {
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// Provides functions for determining when it is safe to merge blocks, and for
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// actually merging blocks, for use by various analyses and passes.
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namespace blockmergeutil {
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// Returns true if and only if |block| has exactly one successor and merging
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// this successor into |block| has no impact on the semantics or validity of the
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// SPIR-V module.
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bool CanMergeWithSuccessor(IRContext* context, BasicBlock* block);
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// Requires that |bi| has a successor that can be safely merged into |bi|, and
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// performs the merge.
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void MergeWithSuccessor(IRContext* context, Function* func,
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Function::iterator bi);
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} // namespace blockmergeutil
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} // namespace opt
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} // namespace spvtools
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#endif // SOURCE_OPT_BLOCK_MERGE_UTIL_H_
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