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

// Copyright (c) 2017 Google 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/strength_reduction_pass.h"

#include <cstring>
#include <memory>
#include <utility>
#include <vector>

#include "source/opt/def_use_manager.h"
#include "source/opt/ir_context.h"
#include "source/opt/log.h"
#include "source/opt/reflect.h"

namespace spvtools {
namespace opt {
namespace {
// Count the number of trailing zeros in the binary representation of
// |constVal|.
uint32_t CountTrailingZeros(uint32_t constVal) { … }

// Return true if |val| is a power of 2.
bool IsPowerOf2(uint32_t val) { … }

}  // namespace

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

bool StrengthReductionPass::ReplaceMultiplyByPowerOf2(
    BasicBlock::iterator* inst) { … }

void StrengthReductionPass::FindIntTypesAndConstants() { … }

uint32_t StrengthReductionPass::GetConstantId(uint32_t val) { … }

bool StrengthReductionPass::ScanFunctions() { … }

}  // namespace opt
}  // namespace spvtools