mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-30 06:50:06 +00:00
55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
// Copyright (c) 2017 The Khronos Group Inc.
|
|
// Copyright (c) 2017 Valve Corporation
|
|
// Copyright (c) 2017 LunarG Inc.
|
|
//
|
|
// 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.
|
|
|
|
#include "source/opt/block_merge_pass.h"
|
|
|
|
#include <vector>
|
|
|
|
#include "source/opt/block_merge_util.h"
|
|
#include "source/opt/ir_context.h"
|
|
#include "source/opt/iterator.h"
|
|
|
|
namespace spvtools {
|
|
namespace opt {
|
|
|
|
bool BlockMergePass::MergeBlocks(Function* func) {
|
|
bool modified = false;
|
|
for (auto bi = func->begin(); bi != func->end();) {
|
|
// Don't bother trying to merge unreachable blocks.
|
|
if (context()->IsReachable(*bi) &&
|
|
blockmergeutil::CanMergeWithSuccessor(context(), &*bi)) {
|
|
blockmergeutil::MergeWithSuccessor(context(), func, bi);
|
|
// Reprocess block.
|
|
modified = true;
|
|
} else {
|
|
++bi;
|
|
}
|
|
}
|
|
return modified;
|
|
}
|
|
|
|
Pass::Status BlockMergePass::Process() {
|
|
// Process all entry point functions.
|
|
ProcessFunction pfn = [this](Function* fp) { return MergeBlocks(fp); };
|
|
bool modified = context()->ProcessReachableCallTree(pfn);
|
|
return modified ? Status::SuccessWithChange : Status::SuccessWithoutChange;
|
|
}
|
|
|
|
BlockMergePass::BlockMergePass() = default;
|
|
|
|
} // namespace opt
|
|
} // namespace spvtools
|