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// 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/reduce/remove_instruction_reduction_opportunity.h"
#include "source/opt/ir_context.h"
namespace spvtools {
namespace reduce {
bool RemoveInstructionReductionOpportunity::PreconditionHolds() { return true; }
void RemoveInstructionReductionOpportunity::Apply() {
const uint32_t kNumEntryPointInOperandsBeforeInterfaceIds = 3;
for (auto& entry_point : inst_->context()->module()->entry_points()) {
opt::Instruction::OperandList new_entry_point_in_operands;
for (uint32_t index = 0; index < entry_point.NumInOperands(); index++) {
if (index >= kNumEntryPointInOperandsBeforeInterfaceIds &&
entry_point.GetSingleWordInOperand(index) == inst_->result_id()) {
continue;
}
new_entry_point_in_operands.push_back(entry_point.GetInOperand(index));
}
entry_point.SetInOperands(std::move(new_entry_point_in_operands));
}
inst_->context()->KillInst(inst_);
}
} // namespace reduce
} // namespace spvtools
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