SPIRV-Tools/source/opt/pass_manager.cpp
David Neto c32e79eeef Add --print-all optimizer option
Adds optimizer API to write disassembly to a given output stream
before each pass, and after the last pass.

Adds spirv-opt --print-all option to write disassembly to stderr
before each pass, and after the last pass.
2018-01-04 18:34:18 -05:00

65 lines
2.1 KiB
C++

// Copyright (c) 2016 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 "pass_manager.h"
#include <iostream>
#include <vector>
#include "ir_context.h"
#include "spirv-tools/libspirv.hpp"
namespace spvtools {
namespace opt {
Pass::Status PassManager::Run(ir::IRContext* context) {
auto status = Pass::Status::SuccessWithoutChange;
// If print_all_stream_ is not null, prints the disassembly of the module
// to that stream, with the given preamble and optionally the pass name.
auto print_disassembly = [&context, this](const char* preamble, Pass* pass) {
if (print_all_stream_) {
std::vector<uint32_t> binary;
context->module()->ToBinary(&binary, false);
SpirvTools t(SPV_ENV_UNIVERSAL_1_2);
std::string disassembly;
t.Disassemble(binary, &disassembly, 0);
*print_all_stream_ << preamble << (pass ? pass->name() : "") << "\n"
<< disassembly << std::endl;
}
};
for (const auto& pass : passes_) {
print_disassembly("; IR before pass ", pass.get());
const auto one_status = pass->Run(context);
if (one_status == Pass::Status::Failure) return one_status;
if (one_status == Pass::Status::SuccessWithChange) status = one_status;
}
print_disassembly("; IR after last pass", nullptr);
// Set the Id bound in the header in case a pass forgot to do so.
//
// TODO(dnovillo): This should be unnecessary and automatically maintained by
// the IRContext.
if (status == Pass::Status::SuccessWithChange) {
context->module()->SetIdBound(context->module()->ComputeIdBound());
}
passes_.clear();
return status;
}
} // namespace opt
} // namespace spvtools