mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-24 12:30:13 +00:00
d90aae9a5a
* Fix .gitignore * Add missing reduction pass: RemoveBlockReductionOpportunityFinder * Add DumpShader functions in test_reduce for debugging * Add DumpShader functions in spirv-reduce for debugging * Fix include style * Don't use "using namespace"
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
// Copyright (c) 2019 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_block_reduction_opportunity.h"
|
|
|
|
#include "source/opt/ir_context.h"
|
|
|
|
namespace spvtools {
|
|
namespace reduce {
|
|
|
|
using opt::BasicBlock;
|
|
using opt::Function;
|
|
|
|
RemoveBlockReductionOpportunity::RemoveBlockReductionOpportunity(
|
|
Function* function, BasicBlock* block)
|
|
: function_(function), block_(block) {
|
|
// precondition:
|
|
assert(block_->begin() != block_->end() &&
|
|
block_->begin()->context()->get_def_use_mgr()->NumUsers(
|
|
block_->id()) == 0 &&
|
|
"RemoveBlockReductionOpportunity block must have 0 references");
|
|
}
|
|
|
|
bool RemoveBlockReductionOpportunity::PreconditionHolds() {
|
|
// Removing other blocks cannot disable this opportunity.
|
|
return true;
|
|
}
|
|
|
|
void RemoveBlockReductionOpportunity::Apply() {
|
|
// We need an iterator pointing to the block, hence the loop.
|
|
for (auto bi = function_->begin(); bi != function_->end(); ++bi) {
|
|
if (bi->id() == block_->id()) {
|
|
bi->KillAllInsts(true);
|
|
bi.Erase();
|
|
// Block removal changes the function, but we don't use analyses, so no
|
|
// need to invalidate them.
|
|
return;
|
|
}
|
|
}
|
|
|
|
assert(false &&
|
|
"Unreachable: we should have found a block with the desired id.");
|
|
}
|
|
|
|
} // namespace reduce
|
|
} // namespace spvtools
|