mirror of
https://github.com/ethereum/solidity
synced 2023-10-03 13:03:40 +00:00
378 lines
10 KiB
C++
378 lines
10 KiB
C++
/*
|
|
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>
|
|
#include <libyul/optimiser/VarDeclInitializer.h>
|
|
#include <libyul/optimiser/BlockFlattener.h>
|
|
#include <libyul/optimiser/CallGraphGenerator.h>
|
|
#include <libyul/optimiser/ControlFlowSimplifier.h>
|
|
#include <libyul/optimiser/ConditionalSimplifier.h>
|
|
#include <libyul/optimiser/DeadCodeEliminator.h>
|
|
#include <libyul/optimiser/FunctionGrouper.h>
|
|
#include <libyul/optimiser/FunctionHoister.h>
|
|
#include <libyul/optimiser/EquivalentFunctionCombiner.h>
|
|
#include <libyul/optimiser/ExpressionSplitter.h>
|
|
#include <libyul/optimiser/ExpressionJoiner.h>
|
|
#include <libyul/optimiser/ExpressionInliner.h>
|
|
#include <libyul/optimiser/FullInliner.h>
|
|
#include <libyul/optimiser/ForLoopConditionIntoBody.h>
|
|
#include <libyul/optimiser/ForLoopConditionOutOfBody.h>
|
|
#include <libyul/optimiser/ForLoopInitRewriter.h>
|
|
#include <libyul/optimiser/ForLoopConditionIntoBody.h>
|
|
#include <libyul/optimiser/Rematerialiser.h>
|
|
#include <libyul/optimiser/UnusedPruner.h>
|
|
#include <libyul/optimiser/ExpressionSimplifier.h>
|
|
#include <libyul/optimiser/CommonSubexpressionEliminator.h>
|
|
#include <libyul/optimiser/Semantics.h>
|
|
#include <libyul/optimiser/SSAReverser.h>
|
|
#include <libyul/optimiser/SSATransform.h>
|
|
#include <libyul/optimiser/StackCompressor.h>
|
|
#include <libyul/optimiser/StructuralSimplifier.h>
|
|
#include <libyul/optimiser/SyntacticalEquality.h>
|
|
#include <libyul/optimiser/RedundantAssignEliminator.h>
|
|
#include <libyul/optimiser/VarNameCleaner.h>
|
|
#include <libyul/optimiser/LoadResolver.h>
|
|
#include <libyul/optimiser/Metrics.h>
|
|
#include <libyul/backends/evm/ConstantOptimiser.h>
|
|
#include <libyul/AsmAnalysis.h>
|
|
#include <libyul/AsmAnalysisInfo.h>
|
|
#include <libyul/AsmData.h>
|
|
#include <libyul/AsmPrinter.h>
|
|
#include <libyul/Object.h>
|
|
|
|
#include <libyul/backends/wasm/WasmDialect.h>
|
|
#include <libyul/backends/evm/NoOutputAssembly.h>
|
|
|
|
#include <libdevcore/CommonData.h>
|
|
|
|
using namespace std;
|
|
using namespace dev;
|
|
using namespace yul;
|
|
|
|
void OptimiserSuite::run(
|
|
Dialect const& _dialect,
|
|
GasMeter const* _meter,
|
|
Object& _object,
|
|
bool _optimizeStackAllocation,
|
|
set<YulString> const& _externallyUsedIdentifiers
|
|
)
|
|
{
|
|
set<YulString> reservedIdentifiers = _externallyUsedIdentifiers;
|
|
reservedIdentifiers += _dialect.fixedFunctionNames();
|
|
|
|
*_object.code = boost::get<Block>(Disambiguator(
|
|
_dialect,
|
|
*_object.analysisInfo,
|
|
reservedIdentifiers
|
|
)(*_object.code));
|
|
Block& ast = *_object.code;
|
|
|
|
OptimiserSuite suite(_dialect, reservedIdentifiers, Debug::None, ast);
|
|
|
|
suite.runSequence({
|
|
VarDeclInitializer::name,
|
|
FunctionHoister::name,
|
|
BlockFlattener::name,
|
|
ForLoopInitRewriter::name,
|
|
DeadCodeEliminator::name,
|
|
FunctionGrouper::name,
|
|
EquivalentFunctionCombiner::name,
|
|
UnusedPruner::name,
|
|
BlockFlattener::name,
|
|
ConditionalSimplifier::name,
|
|
ControlFlowSimplifier::name,
|
|
LiteralRematerialiser::name,
|
|
StructuralSimplifier::name,
|
|
ControlFlowSimplifier::name,
|
|
ForLoopConditionIntoBody::name,
|
|
BlockFlattener::name
|
|
}, ast);
|
|
|
|
// None of the above can make stack problems worse.
|
|
|
|
size_t codeSize = 0;
|
|
for (size_t rounds = 0; rounds < 12; ++rounds)
|
|
{
|
|
{
|
|
size_t newSize = CodeSize::codeSizeIncludingFunctions(ast);
|
|
if (newSize == codeSize)
|
|
break;
|
|
codeSize = newSize;
|
|
}
|
|
|
|
{
|
|
// Turn into SSA and simplify
|
|
suite.runSequence({
|
|
ExpressionSplitter::name,
|
|
SSATransform::name,
|
|
RedundantAssignEliminator::name,
|
|
RedundantAssignEliminator::name,
|
|
ExpressionSimplifier::name,
|
|
CommonSubexpressionEliminator::name,
|
|
LoadResolver::name
|
|
}, ast);
|
|
}
|
|
|
|
{
|
|
// perform structural simplification
|
|
suite.runSequence({
|
|
CommonSubexpressionEliminator::name,
|
|
ConditionalSimplifier::name,
|
|
LiteralRematerialiser::name,
|
|
StructuralSimplifier::name,
|
|
ForLoopConditionOutOfBody::name,
|
|
ControlFlowSimplifier::name,
|
|
StructuralSimplifier::name,
|
|
ControlFlowSimplifier::name,
|
|
BlockFlattener::name,
|
|
DeadCodeEliminator::name,
|
|
ForLoopConditionIntoBody::name,
|
|
UnusedPruner::name
|
|
}, ast);
|
|
}
|
|
|
|
{
|
|
// simplify again
|
|
suite.runSequence({
|
|
LoadResolver::name,
|
|
CommonSubexpressionEliminator::name,
|
|
UnusedPruner::name,
|
|
}, ast);
|
|
}
|
|
|
|
{
|
|
// reverse SSA
|
|
suite.runSequence({
|
|
SSAReverser::name,
|
|
CommonSubexpressionEliminator::name,
|
|
UnusedPruner::name,
|
|
|
|
ExpressionJoiner::name,
|
|
ExpressionJoiner::name,
|
|
}, ast);
|
|
}
|
|
|
|
// should have good "compilability" property here.
|
|
|
|
{
|
|
// run functional expression inliner
|
|
suite.runSequence({
|
|
ExpressionInliner::name,
|
|
UnusedPruner::name,
|
|
}, ast);
|
|
}
|
|
|
|
{
|
|
// Turn into SSA again and simplify
|
|
suite.runSequence({
|
|
ExpressionSplitter::name,
|
|
SSATransform::name,
|
|
RedundantAssignEliminator::name,
|
|
RedundantAssignEliminator::name,
|
|
CommonSubexpressionEliminator::name,
|
|
LoadResolver::name,
|
|
}, ast);
|
|
}
|
|
|
|
{
|
|
// run full inliner
|
|
suite.runSequence({
|
|
FunctionGrouper::name,
|
|
EquivalentFunctionCombiner::name,
|
|
FullInliner::name,
|
|
BlockFlattener::name
|
|
}, ast);
|
|
}
|
|
|
|
{
|
|
// SSA plus simplify
|
|
suite.runSequence({
|
|
ConditionalSimplifier::name,
|
|
CommonSubexpressionEliminator::name,
|
|
SSATransform::name,
|
|
RedundantAssignEliminator::name,
|
|
RedundantAssignEliminator::name,
|
|
LoadResolver::name,
|
|
ExpressionSimplifier::name,
|
|
LiteralRematerialiser::name,
|
|
ForLoopConditionOutOfBody::name,
|
|
StructuralSimplifier::name,
|
|
BlockFlattener::name,
|
|
DeadCodeEliminator::name,
|
|
ControlFlowSimplifier::name,
|
|
CommonSubexpressionEliminator::name,
|
|
SSATransform::name,
|
|
RedundantAssignEliminator::name,
|
|
RedundantAssignEliminator::name,
|
|
ForLoopConditionIntoBody::name,
|
|
UnusedPruner::name,
|
|
CommonSubexpressionEliminator::name,
|
|
}, ast);
|
|
}
|
|
}
|
|
|
|
// Make source short and pretty.
|
|
|
|
suite.runSequence({
|
|
ExpressionJoiner::name,
|
|
Rematerialiser::name,
|
|
UnusedPruner::name,
|
|
ExpressionJoiner::name,
|
|
UnusedPruner::name,
|
|
ExpressionJoiner::name,
|
|
UnusedPruner::name,
|
|
|
|
SSAReverser::name,
|
|
CommonSubexpressionEliminator::name,
|
|
LiteralRematerialiser::name,
|
|
ForLoopConditionOutOfBody::name,
|
|
CommonSubexpressionEliminator::name,
|
|
UnusedPruner::name,
|
|
|
|
ExpressionJoiner::name,
|
|
Rematerialiser::name,
|
|
UnusedPruner::name,
|
|
}, ast);
|
|
|
|
// This is a tuning parameter, but actually just prevents infinite loops.
|
|
size_t stackCompressorMaxIterations = 16;
|
|
suite.runSequence({
|
|
FunctionGrouper::name
|
|
}, ast);
|
|
// We ignore the return value because we will get a much better error
|
|
// message once we perform code generation.
|
|
StackCompressor::run(
|
|
_dialect,
|
|
_object,
|
|
_optimizeStackAllocation,
|
|
stackCompressorMaxIterations
|
|
);
|
|
suite.runSequence({
|
|
BlockFlattener::name,
|
|
DeadCodeEliminator::name,
|
|
ControlFlowSimplifier::name,
|
|
LiteralRematerialiser::name,
|
|
ForLoopConditionOutOfBody::name,
|
|
CommonSubexpressionEliminator::name,
|
|
|
|
FunctionGrouper::name,
|
|
}, ast);
|
|
|
|
if (EVMDialect const* dialect = dynamic_cast<EVMDialect const*>(&_dialect))
|
|
{
|
|
yulAssert(_meter, "");
|
|
ConstantOptimiser{*dialect, *_meter}(ast);
|
|
}
|
|
else if (dynamic_cast<WasmDialect const*>(&_dialect))
|
|
{
|
|
// If the first statement is an empty block, remove it.
|
|
// We should only have function definitions after that.
|
|
if (ast.statements.size() > 1 && boost::get<Block>(ast.statements.front()).statements.empty())
|
|
ast.statements.erase(ast.statements.begin());
|
|
}
|
|
suite.runSequence({
|
|
VarNameCleaner::name
|
|
}, ast);
|
|
|
|
*_object.analysisInfo = AsmAnalyzer::analyzeStrictAssertCorrect(_dialect, _object);
|
|
}
|
|
|
|
namespace
|
|
{
|
|
|
|
|
|
template <class... Step>
|
|
map<string, unique_ptr<OptimiserStep>> optimiserStepCollection()
|
|
{
|
|
map<string, unique_ptr<OptimiserStep>> ret;
|
|
for (unique_ptr<OptimiserStep>& s: make_vector<unique_ptr<OptimiserStep>>(
|
|
(make_unique<OptimiserStepInstance<Step>>())...
|
|
))
|
|
{
|
|
yulAssert(!ret.count(s->name), "");
|
|
ret[s->name] = std::move(s);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
}
|
|
|
|
map<string, unique_ptr<OptimiserStep>> const& OptimiserSuite::allSteps()
|
|
{
|
|
static map<string, unique_ptr<OptimiserStep>> instance;
|
|
if (instance.empty())
|
|
instance = optimiserStepCollection<
|
|
BlockFlattener,
|
|
CommonSubexpressionEliminator,
|
|
ConditionalSimplifier,
|
|
ControlFlowSimplifier,
|
|
DeadCodeEliminator,
|
|
EquivalentFunctionCombiner,
|
|
ExpressionInliner,
|
|
ExpressionJoiner,
|
|
ExpressionSimplifier,
|
|
ExpressionSplitter,
|
|
ForLoopConditionIntoBody,
|
|
ForLoopConditionOutOfBody,
|
|
ForLoopInitRewriter,
|
|
FullInliner,
|
|
FunctionGrouper,
|
|
FunctionHoister,
|
|
LiteralRematerialiser,
|
|
LoadResolver,
|
|
RedundantAssignEliminator,
|
|
Rematerialiser,
|
|
SSAReverser,
|
|
SSATransform,
|
|
StructuralSimplifier,
|
|
UnusedPruner,
|
|
VarDeclInitializer,
|
|
VarNameCleaner
|
|
>();
|
|
return instance;
|
|
}
|
|
|
|
void OptimiserSuite::runSequence(std::vector<string> const& _steps, Block& _ast)
|
|
{
|
|
unique_ptr<Block> copy;
|
|
if (m_debug == Debug::PrintChanges)
|
|
copy = make_unique<Block>(boost::get<Block>(ASTCopier{}(_ast)));
|
|
for (string const& step: _steps)
|
|
{
|
|
if (m_debug == Debug::PrintStep)
|
|
cout << "Running " << step << endl;
|
|
allSteps().at(step)->run(m_context, _ast);
|
|
if (m_debug == Debug::PrintChanges)
|
|
{
|
|
// TODO should add switch to also compare variable names!
|
|
if (SyntacticallyEqual{}.statementEqual(_ast, *copy))
|
|
cout << "== Running " << step << " did not cause changes." << endl;
|
|
else
|
|
{
|
|
cout << "== Running " << step << " changed the AST." << endl;
|
|
cout << AsmPrinter{}(_ast) << endl;
|
|
copy = make_unique<Block>(boost::get<Block>(ASTCopier{}(_ast)));
|
|
}
|
|
}
|
|
}
|
|
}
|