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https://github.com/KhronosGroup/SPIRV-Tools
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2992386ebe
Extends the pass for removing unused instructions so that it can remove global declarations (such as types and variables) that are only used by decorations with which they are intimately connected, such as descriptor set and binding decorations.
42 lines
1.5 KiB
C++
42 lines
1.5 KiB
C++
// Copyright (c) 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "source/reduce/remove_instruction_reduction_opportunity.h"
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace reduce {
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bool RemoveInstructionReductionOpportunity::PreconditionHolds() { return true; }
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void RemoveInstructionReductionOpportunity::Apply() {
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const uint32_t kNumEntryPointInOperandsBeforeInterfaceIds = 3;
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for (auto& entry_point : inst_->context()->module()->entry_points()) {
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opt::Instruction::OperandList new_entry_point_in_operands;
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for (uint32_t index = 0; index < entry_point.NumInOperands(); index++) {
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if (index >= kNumEntryPointInOperandsBeforeInterfaceIds &&
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entry_point.GetSingleWordInOperand(index) == inst_->result_id()) {
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continue;
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}
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new_entry_point_in_operands.push_back(entry_point.GetInOperand(index));
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}
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entry_point.SetInOperands(std::move(new_entry_point_in_operands));
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}
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inst_->context()->KillInst(inst_);
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}
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} // namespace reduce
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} // namespace spvtools
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