// Copyright (c) 2022 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/remove_dontinline_pass.h"

namespace spvtools {

namespace opt {

Pass::Status RemoveDontInline::Process() {

  bool modified = false;

  modified = ClearDontInlineFunctionControl();

  return (modified ? Status::SuccessWithChange : Status::SuccessWithoutChange);

}

bool RemoveDontInline::ClearDontInlineFunctionControl() {

  bool modified = false;

  for (auto& func : *get_module()) {

    ClearDontInlineFunctionControl(&func);

  }

  return modified;

}

bool RemoveDontInline::ClearDontInlineFunctionControl(Function* function) {

  constexpr uint32_t kFunctionControlInOperandIdx = 0;

  Instruction* function_inst = &function->DefInst();

  uint32_t function_control =

      function_inst->GetSingleWordInOperand(kFunctionControlInOperandIdx);

  if ((function_control & uint32_t(spv::FunctionControlMask::DontInline)) ==

      0) {

    return false;

  }

  function_control &= ~uint32_t(spv::FunctionControlMask::DontInline);

  function_inst->SetInOperand(kFunctionControlInOperandIdx, {function_control});

  return true;

}

}  // namespace opt

}  // namespace spvtools