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/*
* Copyright 2016 WebAssembly Community Group participants
*
* 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 "tool-options.h"
//
// Shared optimization options for commandline tools
//
namespace wasm {
struct OptimizationOptions : public ToolOptions {
static constexpr const char* DEFAULT_OPT_PASSES = "O";
std::vector<std::string> passes;
OptimizationOptions(const std::string& command, const std::string& description) : ToolOptions(command, description) {
(*this).add("", "-O", "execute default optimization passes",
Options::Arguments::Zero,
[this](Options*, const std::string&) {
passOptions.setDefaultOptimizationOptions();
passes.push_back(DEFAULT_OPT_PASSES);
})
.add("", "-O0", "execute no optimization passes",
Options::Arguments::Zero,
[this](Options*, const std::string&) {
passOptions.optimizeLevel = 0;
passOptions.shrinkLevel = 0;
})
.add("", "-O1", "execute -O1 optimization passes (quick&useful opts, useful for iteration builds)",
Options::Arguments::Zero,
[this](Options*, const std::string&) {
passOptions.optimizeLevel = 1;
passOptions.shrinkLevel = 0;
passes.push_back(DEFAULT_OPT_PASSES);
})
.add("", "-O2", "execute -O2 optimization passes (most opts, generally gets most perf)",
Options::Arguments::Zero,
[this](Options*, const std::string&) {
passOptions.optimizeLevel = 2;
passOptions.shrinkLevel = 0;
passes.push_back(DEFAULT_OPT_PASSES);
})
.add("", "-O3", "execute -O3 optimization passes (spends potentially a lot of time optimizing)",
Options::Arguments::Zero,
[this](Options*, const std::string&) {
passOptions.optimizeLevel = 3;
passOptions.shrinkLevel = 0;
passes.push_back(DEFAULT_OPT_PASSES);
})
.add("", "-O4", "execute -O4 optimization passes (also flatten the IR, which can take a lot more time and memory, but is useful on more nested / complex / less-optimized input)",
Options::Arguments::Zero,
[this](Options*, const std::string&) {
passOptions.optimizeLevel = 4;
passOptions.shrinkLevel = 0;
passes.push_back(DEFAULT_OPT_PASSES);
})
.add("", "-Os", "execute default optimization passes, focusing on code size",
Options::Arguments::Zero,
[this](Options*, const std::string&) {
passOptions.optimizeLevel = 2;
passOptions.shrinkLevel = 1;
passes.push_back(DEFAULT_OPT_PASSES);
})
.add("", "-Oz", "execute default optimization passes, super-focusing on code size",
Options::Arguments::Zero,
[this](Options*, const std::string&) {
passOptions.optimizeLevel = 2;
passOptions.shrinkLevel = 2;
passes.push_back(DEFAULT_OPT_PASSES);
})
.add("--optimize-level", "-ol", "How much to focus on optimizing code",
Options::Arguments::One,
[this](Options* o, const std::string& argument) {
passOptions.optimizeLevel = atoi(argument.c_str());
})
.add("--shrink-level", "-s", "How much to focus on shrinking code size",
Options::Arguments::One,
[this](Options* o, const std::string& argument) {
passOptions.shrinkLevel = atoi(argument.c_str());
})
.add("--ignore-implicit-traps", "-iit", "Optimize under the helpful assumption that no surprising traps occur (from load, div/mod, etc.)",
Options::Arguments::Zero,
[this](Options*, const std::string&) {
passOptions.ignoreImplicitTraps = true;
})
.add("--low-memory-unused", "-lmu", "Optimize under the helpful assumption that the low 1K of memory is not used by the application",
Options::Arguments::Zero,
[this](Options*, const std::string&) {
passOptions.lowMemoryUnused = true;
});
// add passes in registry
for (const auto& p : PassRegistry::get()->getRegisteredNames()) {
(*this).add(
std::string("--") + p, "", PassRegistry::get()->getPassDescription(p),
Options::Arguments::Zero,
[this, p](Options*, const std::string&) {
passes.push_back(p);
}
);
}
}
bool runningDefaultOptimizationPasses() {
for (auto& pass : passes) {
if (pass == DEFAULT_OPT_PASSES) {
return true;
}
}
return false;
}
bool runningPasses() {
return passes.size() > 0;
}
void runPasses(Module& wasm) {
PassRunner passRunner(&wasm, passOptions);
if (debug) passRunner.setDebug(true);
passRunner.setFeatures(passOptions.features);
for (auto& pass : passes) {
if (pass == DEFAULT_OPT_PASSES) {
passRunner.addDefaultOptimizationPasses();
} else {
passRunner.add(pass);
}
}
passRunner.run();
}
};
} // namespace wasm
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