solidity/libyul/optimiser/Suite.cpp

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/*
This file is part of solidity.
solidity is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
solidity is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with solidity. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* Optimiser suite that combines all steps and also provides the settings for the heuristics.
*/
#include <libyul/optimiser/Suite.h>
#include <libyul/optimiser/Disambiguator.h>
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#include <libyul/optimiser/VarDeclInitializer.h>
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#include <libyul/optimiser/BlockFlattener.h>
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#include <libyul/optimiser/FunctionGrouper.h>
#include <libyul/optimiser/FunctionHoister.h>
#include <libyul/optimiser/EquivalentFunctionCombiner.h>
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#include <libyul/optimiser/ExpressionSplitter.h>
#include <libyul/optimiser/ExpressionJoiner.h>
#include <libyul/optimiser/ExpressionInliner.h>
#include <libyul/optimiser/FullInliner.h>
#include <libyul/optimiser/ForLoopInitRewriter.h>
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#include <libyul/optimiser/Rematerialiser.h>
#include <libyul/optimiser/UnusedPruner.h>
#include <libyul/optimiser/ExpressionSimplifier.h>
#include <libyul/optimiser/CommonSubexpressionEliminator.h>
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#include <libyul/optimiser/SSAReverser.h>
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#include <libyul/optimiser/SSATransform.h>
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#include <libyul/optimiser/StackCompressor.h>
#include <libyul/optimiser/StructuralSimplifier.h>
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#include <libyul/optimiser/RedundantAssignEliminator.h>
#include <libyul/AsmAnalysisInfo.h>
#include <libyul/AsmData.h>
#include <libyul/AsmPrinter.h>
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#include <libdevcore/CommonData.h>
using namespace std;
using namespace dev;
using namespace yul;
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void OptimiserSuite::run(
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shared_ptr<Dialect> const& _dialect,
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Block& _ast,
AsmAnalysisInfo const& _analysisInfo,
set<YulString> const& _externallyUsedIdentifiers
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)
{
set<YulString> reservedIdentifiers = _externallyUsedIdentifiers;
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Block ast = boost::get<Block>(Disambiguator(*_dialect, _analysisInfo, reservedIdentifiers)(_ast));
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(VarDeclInitializer{})(ast);
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(FunctionHoister{})(ast);
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(BlockFlattener{})(ast);
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(FunctionGrouper{})(ast);
EquivalentFunctionCombiner::run(ast);
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UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
(ForLoopInitRewriter{})(ast);
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(BlockFlattener{})(ast);
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StructuralSimplifier{*_dialect}(ast);
(BlockFlattener{})(ast);
// None of the above can make stack problems worse.
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NameDispenser dispenser{*_dialect, ast};
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for (size_t i = 0; i < 4; i++)
{
{
// Turn into SSA and simplify
ExpressionSplitter{*_dialect, dispenser}(ast);
SSATransform::run(ast, dispenser);
RedundantAssignEliminator::run(*_dialect, ast);
RedundantAssignEliminator::run(*_dialect, ast);
ExpressionSimplifier::run(*_dialect, ast);
CommonSubexpressionEliminator{*_dialect}(ast);
}
{
// still in SSA, perform structural simplification
StructuralSimplifier{*_dialect}(ast);
(BlockFlattener{})(ast);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
}
{
// simplify again
CommonSubexpressionEliminator{*_dialect}(ast);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
}
{
// reverse SSA
SSAReverser::run(ast);
CommonSubexpressionEliminator{*_dialect}(ast);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
ExpressionJoiner::run(ast);
ExpressionJoiner::run(ast);
}
// should have good "compilability" property here.
{
// run functional expression inliner
ExpressionInliner(*_dialect, ast).run();
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
}
{
// Turn into SSA again and simplify
ExpressionSplitter{*_dialect, dispenser}(ast);
SSATransform::run(ast, dispenser);
RedundantAssignEliminator::run(*_dialect, ast);
RedundantAssignEliminator::run(*_dialect, ast);
CommonSubexpressionEliminator{*_dialect}(ast);
}
{
// run full inliner
(FunctionGrouper{})(ast);
EquivalentFunctionCombiner::run(ast);
FullInliner{ast, dispenser}.run();
(BlockFlattener{})(ast);
}
{
// SSA plus simplify
SSATransform::run(ast, dispenser);
RedundantAssignEliminator::run(*_dialect, ast);
RedundantAssignEliminator::run(*_dialect, ast);
ExpressionSimplifier::run(*_dialect, ast);
StructuralSimplifier{*_dialect}(ast);
(BlockFlattener{})(ast);
CommonSubexpressionEliminator{*_dialect}(ast);
SSATransform::run(ast, dispenser);
RedundantAssignEliminator::run(*_dialect, ast);
RedundantAssignEliminator::run(*_dialect, ast);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
CommonSubexpressionEliminator{*_dialect}(ast);
}
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}
// Make source short and pretty.
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ExpressionJoiner::run(ast);
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Rematerialiser::run(*_dialect, ast);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
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ExpressionJoiner::run(ast);
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UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
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ExpressionJoiner::run(ast);
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UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
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SSAReverser::run(ast);
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CommonSubexpressionEliminator{*_dialect}(ast);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
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ExpressionJoiner::run(ast);
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Rematerialiser::run(*_dialect, ast);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
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(FunctionGrouper{})(ast);
StackCompressor::run(_dialect, ast);
(BlockFlattener{})(ast);
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_ast = std::move(ast);
}