chromium/third_party/spirv-tools/src/source/opt/loop_unswitch_pass.cpp

// Copyright (c) 2018 Google LLC.
//
// 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/loop_unswitch_pass.h"

#include <functional>
#include <list>
#include <memory>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

#include "source/opt/basic_block.h"
#include "source/opt/dominator_tree.h"
#include "source/opt/fold.h"
#include "source/opt/function.h"
#include "source/opt/instruction.h"
#include "source/opt/ir_builder.h"
#include "source/opt/ir_context.h"
#include "source/opt/loop_descriptor.h"
#include "source/opt/loop_utils.h"

namespace spvtools {
namespace opt {
namespace {
constexpr uint32_t kTypePointerStorageClassInIdx = …;

// This class handle the unswitch procedure for a given loop.
// The unswitch will not happen if:
//  - The loop has any instruction that will prevent it;
//  - The loop invariant condition is not uniform.
class LoopUnswitch { … };

}  // namespace

Pass::Status LoopUnswitchPass::Process() { … }

bool LoopUnswitchPass::ProcessFunction(Function* f) { … }

}  // namespace opt
}  // namespace spvtools