mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-12-11 03:10:05 +00:00
61 lines
2.1 KiB
C++
61 lines
2.1 KiB
C++
// Copyright (c) 2018 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 "remove_unreferenced_instruction_reduction_pass.h"
|
|
#include "remove_instruction_reduction_opportunity.h"
|
|
#include "source/opcode.h"
|
|
#include "source/opt/instruction.h"
|
|
|
|
namespace spvtools {
|
|
namespace reduce {
|
|
|
|
using namespace opt;
|
|
|
|
std::vector<std::unique_ptr<ReductionOpportunity>>
|
|
RemoveUnreferencedInstructionReductionPass::GetAvailableOpportunities(
|
|
opt::IRContext* context) const {
|
|
std::vector<std::unique_ptr<ReductionOpportunity>> result;
|
|
|
|
for (auto& function : *context->module()) {
|
|
for (auto& block : function) {
|
|
for (auto& inst : block) {
|
|
if (context->get_def_use_mgr()->NumUses(&inst) > 0) {
|
|
continue;
|
|
}
|
|
if (spvOpcodeIsBlockTerminator(inst.opcode()) ||
|
|
inst.opcode() == SpvOpSelectionMerge ||
|
|
inst.opcode() == SpvOpLoopMerge) {
|
|
// In this reduction pass we do not want to affect static control
|
|
// flow.
|
|
continue;
|
|
}
|
|
// Given that we're in a block, we should only get here if the
|
|
// instruction is not directly related to control flow; i.e., it's
|
|
// some straightforward instruction with an unused result, like an
|
|
// arithmetic operation or function call.
|
|
result.push_back(
|
|
MakeUnique<RemoveInstructionReductionOpportunity>(&inst));
|
|
}
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
std::string RemoveUnreferencedInstructionReductionPass::GetName() const {
|
|
return "RemoveUnreferencedInstructionReductionPass";
|
|
}
|
|
|
|
} // namespace reduce
|
|
} // namespace spvtools
|