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

// Copyright (c) 2016 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/fold_spec_constant_op_and_composite_pass.h"

#include <algorithm>
#include <tuple>

#include "source/opt/constants.h"
#include "source/util/make_unique.h"

namespace spvtools {
namespace opt {

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

bool FoldSpecConstantOpAndCompositePass::ProcessOpSpecConstantOp(
    Module::inst_iterator* pos) { … }

Instruction* FoldSpecConstantOpAndCompositePass::FoldWithInstructionFolder(
    Module::inst_iterator* inst_iter_ptr) { … }

namespace {
// A helper function to check the type for component wise operations. Returns
// true if the type:
//  1) is bool type;
//  2) is 32-bit int type;
//  3) is vector of bool type;
//  4) is vector of 32-bit integer type.
// Otherwise returns false.
bool IsValidTypeForComponentWiseOperation(const analysis::Type* type) { … }

// Encodes the integer |value| of in a word vector format appropriate for
// representing this value as a operands for a constant definition. Performs
// zero-extension/sign-extension/truncation when needed, based on the signess of
// the given target type.
//
// Note: type |type| argument must be either Integer or Bool.
utils::SmallVector<uint32_t, 2> EncodeIntegerAsWords(const analysis::Type& type,
                                                     uint32_t value) { … }
}  // namespace

Instruction* FoldSpecConstantOpAndCompositePass::DoComponentWiseOperation(
    Module::inst_iterator* pos) { … }

}  // namespace opt
}  // namespace spvtools