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https://gitee.com/openharmony/third_party_spirv-tools
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52 lines
1.6 KiB
C++
52 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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//
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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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#include "source/opt/block_merge_pass.h"
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#include "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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bool BlockMergePass::MergeBlocks(Function* func) {
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bool modified = false;
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for (auto bi = func->begin(); bi != func->end();) {
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// Don't bother trying to merge unreachable blocks.
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if (context()->IsReachable(*bi) &&
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blockmergeutil::CanMergeWithSuccessor(context(), &*bi)) {
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blockmergeutil::MergeWithSuccessor(context(), func, bi);
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// Reprocess block.
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modified = true;
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} else {
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++bi;
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}
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}
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return modified;
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}
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Pass::Status BlockMergePass::Process() {
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// Process all entry point functions.
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ProcessFunction pfn = [this](Function* fp) { return MergeBlocks(fp); };
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bool modified = context()->ProcessReachableCallTree(pfn);
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return modified ? Status::SuccessWithChange : Status::SuccessWithoutChange;
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}
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BlockMergePass::BlockMergePass() = default;
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} // namespace opt
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} // namespace spvtools
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