mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-23 04:00:05 +00:00
eda2cfbe12
This Cl cleans up the include paths to be relative to the top level directory. Various include-what-you-use fixes have been added.
68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
// Copyright (c) 2017 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/local_redundancy_elimination.h"
|
|
|
|
#include "source/opt/value_number_table.h"
|
|
|
|
namespace spvtools {
|
|
namespace opt {
|
|
|
|
Pass::Status LocalRedundancyEliminationPass::Process() {
|
|
bool modified = false;
|
|
ValueNumberTable vnTable(context());
|
|
|
|
for (auto& func : *get_module()) {
|
|
for (auto& bb : func) {
|
|
// Keeps track of all ids that contain a given value number. We keep
|
|
// track of multiple values because they could have the same value, but
|
|
// different decorations.
|
|
std::map<uint32_t, uint32_t> value_to_ids;
|
|
if (EliminateRedundanciesInBB(&bb, vnTable, &value_to_ids))
|
|
modified = true;
|
|
}
|
|
}
|
|
return (modified ? Status::SuccessWithChange : Status::SuccessWithoutChange);
|
|
}
|
|
|
|
bool LocalRedundancyEliminationPass::EliminateRedundanciesInBB(
|
|
BasicBlock* block, const ValueNumberTable& vnTable,
|
|
std::map<uint32_t, uint32_t>* value_to_ids) {
|
|
bool modified = false;
|
|
|
|
auto func = [this, &vnTable, &modified, value_to_ids](Instruction* inst) {
|
|
if (inst->result_id() == 0) {
|
|
return;
|
|
}
|
|
|
|
uint32_t value = vnTable.GetValueNumber(inst);
|
|
|
|
if (value == 0) {
|
|
return;
|
|
}
|
|
|
|
auto candidate = value_to_ids->insert({value, inst->result_id()});
|
|
if (!candidate.second) {
|
|
context()->KillNamesAndDecorates(inst);
|
|
context()->ReplaceAllUsesWith(inst->result_id(), candidate.first->second);
|
|
context()->KillInst(inst);
|
|
modified = true;
|
|
}
|
|
};
|
|
block->ForEachInst(func);
|
|
return modified;
|
|
}
|
|
} // namespace opt
|
|
} // namespace spvtools
|