mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-12-27 02:10:15 +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.
70 lines
2.2 KiB
C++
70 lines
2.2 KiB
C++
// 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/opt/loop_fusion_pass.h"
|
|
|
|
#include "source/opt/ir_context.h"
|
|
#include "source/opt/loop_descriptor.h"
|
|
#include "source/opt/loop_fusion.h"
|
|
#include "source/opt/register_pressure.h"
|
|
|
|
namespace spvtools {
|
|
namespace opt {
|
|
|
|
Pass::Status LoopFusionPass::Process() {
|
|
bool modified = false;
|
|
Module* module = context()->module();
|
|
|
|
// Process each function in the module
|
|
for (Function& f : *module) {
|
|
modified |= ProcessFunction(&f);
|
|
}
|
|
|
|
return modified ? Status::SuccessWithChange : Status::SuccessWithoutChange;
|
|
}
|
|
|
|
bool LoopFusionPass::ProcessFunction(Function* function) {
|
|
LoopDescriptor& ld = *context()->GetLoopDescriptor(function);
|
|
|
|
// If a loop doesn't have a preheader needs then it needs to be created. Make
|
|
// sure to return Status::SuccessWithChange in that case.
|
|
auto modified = ld.CreatePreHeaderBlocksIfMissing();
|
|
|
|
// TODO(tremmelg): Could the only loop that |loop| could possibly be fused be
|
|
// picked out so don't have to check every loop
|
|
for (auto& loop_0 : ld) {
|
|
for (auto& loop_1 : ld) {
|
|
LoopFusion fusion(context(), &loop_0, &loop_1);
|
|
|
|
if (fusion.AreCompatible() && fusion.IsLegal()) {
|
|
RegisterLiveness liveness(context(), function);
|
|
RegisterLiveness::RegionRegisterLiveness reg_pressure{};
|
|
liveness.SimulateFusion(loop_0, loop_1, ®_pressure);
|
|
|
|
if (reg_pressure.used_registers_ <= max_registers_per_loop_) {
|
|
fusion.Fuse();
|
|
// Recurse, as the current iterators will have been invalidated.
|
|
ProcessFunction(function);
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return modified;
|
|
}
|
|
|
|
} // namespace opt
|
|
} // namespace spvtools
|