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Merge pull request #5925 from ethereum/stackCompressor

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Stack compressor
This commit is contained in:
chriseth 2019-02-11 16:17:47 +01:00 committed by GitHub
commit 18c7ad08a0
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GPG Key ID: 4AEE18F83AFDEB23
21 changed files with 482 additions and 164 deletions
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2
libsolidity/interface/AssemblyStack.cpp
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@ -134,7 +134,7 @@ void AssemblyStack::optimize(yul::Object& _object)
for (auto& subNode: _object.subObjects)
if (auto subObject = dynamic_cast<yul::Object*>(subNode.get()))
optimize(*subObject);
yul::OptimiserSuite::run(*languageToDialect(m_language), *_object.code, *_object.analysisInfo);
yul::OptimiserSuite::run(languageToDialect(m_language), *_object.code, *_object.analysisInfo);
}
MachineAssemblyObject AssemblyStack::assemble(Machine _machine, bool _optimize) const

2
libyul/CMakeLists.txt
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@ -94,6 +94,8 @@ add_library(yul
optimiser/Semantics.h
optimiser/SimplificationRules.cpp
optimiser/SimplificationRules.h
optimiser/StackCompressor.cpp
optimiser/StackCompressor.h
optimiser/StructuralSimplifier.cpp
optimiser/StructuralSimplifier.h
optimiser/Substitution.cpp

7
libyul/optimiser/NameCollector.cpp
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@ -60,6 +60,13 @@ map<YulString, size_t> ReferencesCounter::countReferences(Block const& _block)
return counter.references();
}
map<YulString, size_t> ReferencesCounter::countReferences(FunctionDefinition const& _function)
{
ReferencesCounter counter;
counter(_function);
return counter.references();
}
map<YulString, size_t> ReferencesCounter::countReferences(Expression const& _expression)
{
ReferencesCounter counter;

1
libyul/optimiser/NameCollector.h
View File

@ -59,6 +59,7 @@ public:
virtual void operator()(FunctionCall const& _funCall);
static std::map<YulString, size_t> countReferences(Block const& _block);
static std::map<YulString, size_t> countReferences(FunctionDefinition const& _function);
static std::map<YulString, size_t> countReferences(Expression const& _expression);
std::map<YulString, size_t> const& references() const { return m_references; }

35
libyul/optimiser/Rematerialiser.cpp
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@ -30,14 +30,39 @@ using namespace std;
using namespace dev;
using namespace yul;
void Rematerialiser::run(Dialect const& _dialect, Block& _ast)
void Rematerialiser::run(Dialect const& _dialect, Block& _ast, set<YulString> _varsToAlwaysRematerialize)
{
Rematerialiser{_dialect, _ast}(_ast);
Rematerialiser{_dialect, _ast, std::move(_varsToAlwaysRematerialize)}(_ast);
}
Rematerialiser::Rematerialiser(Dialect const& _dialect, Block& _ast):
void Rematerialiser::run(
Dialect const& _dialect,
FunctionDefinition& _function,
set<YulString> _varsToAlwaysRematerialize
)
{
Rematerialiser{_dialect, _function, std::move(_varsToAlwaysRematerialize)}(_function);
}
Rematerialiser::Rematerialiser(
Dialect const& _dialect,
Block& _ast,
set<YulString> _varsToAlwaysRematerialize
):
DataFlowAnalyzer(_dialect),
m_referenceCounts(ReferencesCounter::countReferences(_ast))
m_referenceCounts(ReferencesCounter::countReferences(_ast)),
m_varsToAlwaysRematerialize(std::move(_varsToAlwaysRematerialize))
{
}
Rematerialiser::Rematerialiser(
Dialect const& _dialect,
FunctionDefinition& _function,
set<YulString> _varsToAlwaysRematerialize
):
DataFlowAnalyzer(_dialect),
m_referenceCounts(ReferencesCounter::countReferences(_function)),
m_varsToAlwaysRematerialize(std::move(_varsToAlwaysRematerialize))
{
}
@ -53,7 +78,7 @@ void Rematerialiser::visit(Expression& _e)
auto const& value = *m_value.at(name);
size_t refs = m_referenceCounts[name];
size_t cost = CodeCost::codeCost(value);
if (refs <= 1 || cost == 0 || (refs <= 5 && cost <= 1))
if (refs <= 1 || cost == 0 || (refs <= 5 && cost <= 1) || m_varsToAlwaysRematerialize.count(name))
{
assertThrow(m_referenceCounts[name] > 0, OptimizerException, "");
for (auto const& ref: m_references[name])

23
libyul/optimiser/Rematerialiser.h
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@ -38,15 +38,34 @@ namespace yul
class Rematerialiser: public DataFlowAnalyzer
{
public:
static void run(Dialect const& _dialect, Block& _ast);
static void run(
Dialect const& _dialect,
Block& _ast,
std::set<YulString> _varsToAlwaysRematerialize = {}
);
static void run(
Dialect const& _dialect,
FunctionDefinition& _function,
std::set<YulString> _varsToAlwaysRematerialize = {}
);
protected:
Rematerialiser(Dialect const& _dialect, Block& _ast);
Rematerialiser(
Dialect const& _dialect,
Block& _ast,
std::set<YulString> _varsToAlwaysRematerialize = {}
);
Rematerialiser(
Dialect const& _dialect,
FunctionDefinition& _function,
std::set<YulString> _varsToAlwaysRematerialize = {}
);
using ASTModifier::visit;
void visit(Expression& _e) override;
std::map<YulString, size_t> m_referenceCounts;
std::set<YulString> m_varsToAlwaysRematerialize;
};
}

107
libyul/optimiser/StackCompressor.cpp Normal file
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@ -0,0 +1,107 @@
/*(
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/>.
*/
/**
* Optimisation stage that aggressively rematerializes certain variables ina a function to free
* space on the stack until it is compilable.
*/
#include <libyul/optimiser/StackCompressor.h>
#include <libyul/optimiser/SSAValueTracker.h>
#include <libyul/optimiser/NameCollector.h>
#include <libyul/optimiser/Rematerialiser.h>
#include <libyul/optimiser/UnusedPruner.h>
#include <libyul/optimiser/Metrics.h>
#include <libyul/optimiser/Semantics.h>
#include <libyul/CompilabilityChecker.h>
#include <libyul/AsmData.h>
using namespace std;
using namespace dev;
using namespace yul;
namespace
{
template <typename ASTNode>
void eliminateVariables(shared_ptr<Dialect> const& _dialect, ASTNode& _node, size_t _numVariables)
{
SSAValueTracker ssaValues;
ssaValues(_node);
map<YulString, size_t> references = ReferencesCounter::countReferences(_node);
set<pair<size_t, YulString>> rematCosts;
for (auto const& ssa: ssaValues.values())
{
if (!MovableChecker{*_dialect, *ssa.second}.movable())
continue;
size_t numRef = references[ssa.first];
size_t cost = 0;
if (numRef > 1)
cost = CodeCost::codeCost(*ssa.second) * (numRef - 1);
rematCosts.insert(make_pair(cost, ssa.first));
}
// Select at most _numVariables
set<YulString> varsToEliminate;
for (auto const& costs: rematCosts)
{
if (varsToEliminate.size() >= _numVariables)
break;
varsToEliminate.insert(costs.second);
}
Rematerialiser::run(*_dialect, _node, std::move(varsToEliminate));
UnusedPruner::runUntilStabilised(*_dialect, _node);
}
}
bool StackCompressor::run(shared_ptr<Dialect> const& _dialect, Block& _ast)
{
yulAssert(
_ast.statements.size() > 0 && _ast.statements.at(0).type() == typeid(Block),
"Need to run the function grouper before the stack compressor."
);
for (size_t iterations = 0; iterations < 4; iterations++)
{
map<YulString, int> stackSurplus = CompilabilityChecker::run(_dialect, _ast);
if (stackSurplus.empty())
return true;
if (stackSurplus.count(YulString{}))
{
yulAssert(stackSurplus.at({}) > 0, "Invalid surplus value.");
eliminateVariables(_dialect, boost::get<Block>(_ast.statements.at(0)), stackSurplus.at({}));
}
for (size_t i = 1; i < _ast.statements.size(); ++i)
{
FunctionDefinition& fun = boost::get<FunctionDefinition>(_ast.statements[i]);
if (!stackSurplus.count(fun.name))
continue;
yulAssert(stackSurplus.at(fun.name) > 0, "Invalid surplus value.");
eliminateVariables(_dialect, fun, stackSurplus.at(fun.name));
}
}
return false;
}

47
libyul/optimiser/StackCompressor.h Normal file
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@ -0,0 +1,47 @@
/*
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/>.
*/
/**
* Optimisation stage that aggressively rematerializes certain variables ina a function to free
* space on the stack until it is compilable.
*/
#pragma once
#include <memory>
namespace yul
{
struct Dialect;
struct Block;
struct FunctionDefinition;
/**
* Optimisation stage that aggressively rematerializes certain variables in a function to free
* space on the stack until it is compilable.
*
* Prerequisite: Disambiguator, Function Grouper
*/
class StackCompressor
{
public:
/// Try to remove local variables until the AST is compilable.
/// @returns true if it was successful.
static bool run(std::shared_ptr<Dialect> const& _dialect, Block& _ast);
};
}

146
libyul/optimiser/Suite.cpp
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@ -37,6 +37,7 @@
#include <libyul/optimiser/CommonSubexpressionEliminator.h>
#include <libyul/optimiser/SSAReverser.h>
#include <libyul/optimiser/SSATransform.h>
#include <libyul/optimiser/StackCompressor.h>
#include <libyul/optimiser/StructuralSimplifier.h>
#include <libyul/optimiser/RedundantAssignEliminator.h>
#include <libyul/AsmAnalysisInfo.h>
@ -50,7 +51,7 @@ using namespace dev;
using namespace yul;
void OptimiserSuite::run(
Dialect const& _dialect,
shared_ptr<Dialect> const& _dialect,
Block& _ast,
AsmAnalysisInfo const& _analysisInfo,
set<YulString> const& _externallyUsedIdentifiers
@ -58,86 +59,121 @@ void OptimiserSuite::run(
{
set<YulString> reservedIdentifiers = _externallyUsedIdentifiers;
Block ast = boost::get<Block>(Disambiguator(_dialect, _analysisInfo, reservedIdentifiers)(_ast));
Block ast = boost::get<Block>(Disambiguator(*_dialect, _analysisInfo, reservedIdentifiers)(_ast));
(VarDeclInitializer{})(ast);
(FunctionHoister{})(ast);
(BlockFlattener{})(ast);
(FunctionGrouper{})(ast);
EquivalentFunctionCombiner::run(ast);
UnusedPruner::runUntilStabilised(_dialect, ast, reservedIdentifiers);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
(ForLoopInitRewriter{})(ast);
(BlockFlattener{})(ast);
StructuralSimplifier{_dialect}(ast);
StructuralSimplifier{*_dialect}(ast);
(BlockFlattener{})(ast);
NameDispenser dispenser{_dialect, ast};
// None of the above can make stack problems worse.
NameDispenser dispenser{*_dialect, ast};
for (size_t i = 0; i < 4; i++)
{
ExpressionSplitter{_dialect, dispenser}(ast);
SSATransform::run(ast, dispenser);
RedundantAssignEliminator::run(_dialect, ast);
RedundantAssignEliminator::run(_dialect, ast);
{
// 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);
StructuralSimplifier{_dialect}(ast);
(BlockFlattener{})(ast);
SSATransform::run(ast, dispenser);
RedundantAssignEliminator::run(_dialect, ast);
RedundantAssignEliminator::run(_dialect, ast);
UnusedPruner::runUntilStabilised(_dialect, ast, reservedIdentifiers);
CommonSubexpressionEliminator{_dialect}(ast);
UnusedPruner::runUntilStabilised(_dialect, ast, reservedIdentifiers);
ExpressionSimplifier::run(*_dialect, ast);
CommonSubexpressionEliminator{*_dialect}(ast);
}
SSAReverser::run(ast);
CommonSubexpressionEliminator{_dialect}(ast);
UnusedPruner::runUntilStabilised(_dialect, ast, reservedIdentifiers);
{
// 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);
}
ExpressionJoiner::run(ast);
ExpressionJoiner::run(ast);
ExpressionInliner(_dialect, ast).run();
UnusedPruner::runUntilStabilised(_dialect, ast, reservedIdentifiers);
{
// reverse SSA
SSAReverser::run(ast);
CommonSubexpressionEliminator{*_dialect}(ast);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
ExpressionSplitter{_dialect, dispenser}(ast);
SSATransform::run(ast, dispenser);
RedundantAssignEliminator::run(_dialect, ast);
RedundantAssignEliminator::run(_dialect, ast);
CommonSubexpressionEliminator{_dialect}(ast);
ExpressionJoiner::run(ast);
ExpressionJoiner::run(ast);
}
(FunctionGrouper{})(ast);
EquivalentFunctionCombiner::run(ast);
FullInliner{ast, dispenser}.run();
(BlockFlattener{})(ast);
// should have good "compilability" property here.
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);
{
// 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);
}
}
// Make source short and pretty.
ExpressionJoiner::run(ast);
Rematerialiser::run(_dialect, ast);
UnusedPruner::runUntilStabilised(_dialect, ast, reservedIdentifiers);
Rematerialiser::run(*_dialect, ast);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
ExpressionJoiner::run(ast);
UnusedPruner::runUntilStabilised(_dialect, ast, reservedIdentifiers);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
ExpressionJoiner::run(ast);
UnusedPruner::runUntilStabilised(_dialect, ast, reservedIdentifiers);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
SSAReverser::run(ast);
CommonSubexpressionEliminator{_dialect}(ast);
UnusedPruner::runUntilStabilised(_dialect, ast, reservedIdentifiers);
CommonSubexpressionEliminator{*_dialect}(ast);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
ExpressionJoiner::run(ast);
Rematerialiser::run(_dialect, ast);
UnusedPruner::runUntilStabilised(_dialect, ast, reservedIdentifiers);
Rematerialiser::run(*_dialect, ast);
UnusedPruner::runUntilStabilised(*_dialect, ast, reservedIdentifiers);
(FunctionGrouper{})(ast);
StackCompressor::run(_dialect, ast);
(BlockFlattener{})(ast);
_ast = std::move(ast);
}

2
libyul/optimiser/Suite.h
View File

@ -38,7 +38,7 @@ class OptimiserSuite
{
public:
static void run(
Dialect const& _dialect,
std::shared_ptr<Dialect> const& _dialect,
Block& _ast,
AsmAnalysisInfo const& _analysisInfo,
std::set<YulString> const& _externallyUsedIdentifiers = {}

26
libyul/optimiser/UnusedPruner.cpp
View File

@ -35,10 +35,15 @@ using namespace yul;
UnusedPruner::UnusedPruner(Dialect const& _dialect, Block& _ast, set<YulString> const& _externallyUsedFunctions):
m_dialect(_dialect)
{
ReferencesCounter counter;
counter(_ast);
m_references = ReferencesCounter::countReferences(_ast);
for (auto const& f: _externallyUsedFunctions)
++m_references[f];
}
m_references = counter.references();
UnusedPruner::UnusedPruner(Dialect const& _dialect, FunctionDefinition& _function, set<YulString> const& _externallyUsedFunctions):
m_dialect(_dialect)
{
m_references = ReferencesCounter::countReferences(_function);
for (auto const& f: _externallyUsedFunctions)
++m_references[f];
}
@ -116,6 +121,21 @@ void UnusedPruner::runUntilStabilised(
}
}
void UnusedPruner::runUntilStabilised(
Dialect const& _dialect,
FunctionDefinition& _function,
set<YulString> const& _externallyUsedFunctions
)
{
while (true)
{
UnusedPruner pruner(_dialect, _function, _externallyUsedFunctions);
pruner(_function);
if (!pruner.shouldRunAgain())
return;
}
}
bool UnusedPruner::used(YulString _name) const
{
return m_references.count(_name) && m_references.at(_name) > 0;

13
libyul/optimiser/UnusedPruner.h
View File

@ -46,6 +46,11 @@ public:
Block& _ast,
std::set<YulString> const& _externallyUsedFunctions = {}
);
UnusedPruner(
Dialect const& _dialect,
FunctionDefinition& _function,
std::set<YulString> const& _externallyUsedFunctions = {}
);
using ASTModifier::operator();
void operator()(Block& _block) override;
@ -60,6 +65,14 @@ public:
std::set<YulString> const& _externallyUsedFunctions = {}
);
// Run the pruner until the code does not change anymore.
// Only run on the given function.
static void runUntilStabilised(
Dialect const& _dialect,
FunctionDefinition& _functionDefinition,
std::set<YulString> const& _externallyUsedFunctions = {}
);
private:
bool used(YulString _name) const;
void subtractReferences(std::map<YulString, size_t> const& _subtrahend);

10
test/libyul/YulOptimizerTest.cpp
View File

@ -42,6 +42,7 @@
#include <libyul/optimiser/SSATransform.h>
#include <libyul/optimiser/RedundantAssignEliminator.h>
#include <libyul/optimiser/StructuralSimplifier.h>
#include <libyul/optimiser/StackCompressor.h>
#include <libyul/optimiser/Suite.h>
#include <libyul/backends/evm/EVMDialect.h>
#include <libyul/AsmPrinter.h>
@ -241,8 +242,15 @@ bool YulOptimizerTest::run(ostream& _stream, string const& _linePrefix, bool con
CommonSubexpressionEliminator{*m_dialect}(*m_ast);
UnusedPruner::runUntilStabilised(*m_dialect, *m_ast);
}
else if (m_optimizerStep == "stackCompressor")
{
disambiguate();
(FunctionGrouper{})(*m_ast);
StackCompressor::run(m_dialect, *m_ast);
(BlockFlattener{})(*m_ast);
}
else if (m_optimizerStep == "fullSuite")
OptimiserSuite::run(*m_dialect, *m_ast, *m_analysisInfo);
OptimiserSuite::run(m_dialect, *m_ast, *m_analysisInfo);
else
{
FormattedScope(_stream, _formatted, {formatting::BOLD, formatting::RED}) << _linePrefix << "Invalid optimizer step: " << m_optimizerStep << endl;

38
test/libyul/yulOptimizerTests/fullSuite/abi2.yul
View File

@ -1073,12 +1073,12 @@
// fullSuite
// {
// let _2 := mload(1)
// let _153 := mload(0)
// if slt(sub(_2, _153), 64)
// let _134 := mload(0)
// if slt(sub(_2, _134), 64)
// {
// revert(0, 0)
// }
// sstore(0, and(calldataload(_153), 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))
// sstore(0, and(calldataload(_134), 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))
// let x0, x1, x2, x3, x4 := abi_decode_tuple_t_addresst_uint256t_bytes_calldata_ptrt_enum$_Operation_$1949(mload(7), mload(8))
// sstore(x1, x0)
// sstore(x3, x2)
@ -1093,40 +1093,40 @@
// value0_57 := and(calldataload(headStart_55), 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF)
// value1_58 := calldataload(add(headStart_55, 32))
// let offset_62 := calldataload(add(headStart_55, 64))
// let _200 := 0xffffffffffffffff
// if gt(offset_62, _200)
// let _181 := 0xffffffffffffffff
// if gt(offset_62, _181)
// {
// revert(value4, value4)
// }
// let _202 := add(headStart_55, offset_62)
// if iszero(slt(add(_202, 0x1f), dataEnd_56))
// let _183 := add(headStart_55, offset_62)
// if iszero(slt(add(_183, 0x1f), dataEnd_56))
// {
// revert(value4, value4)
// }
// let abi_decode_length_15_244 := calldataload(_202)
// if gt(abi_decode_length_15_244, _200)
// let abi_decode_length_15_225 := calldataload(_183)
// if gt(abi_decode_length_15_225, _181)
// {
// revert(value4, value4)
// }
// if gt(add(add(_202, abi_decode_length_15_244), 32), dataEnd_56)
// if gt(add(add(_183, abi_decode_length_15_225), 32), dataEnd_56)
// {
// revert(value4, value4)
// }
// value2_59 := add(_202, 32)
// value3 := abi_decode_length_15_244
// let _205 := calldataload(add(headStart_55, 96))
// if iszero(lt(_205, 3))
// value2_59 := add(_183, 32)
// value3 := abi_decode_length_15_225
// let _186 := calldataload(add(headStart_55, 96))
// if iszero(lt(_186, 3))
// {
// revert(value4, value4)
// }
// value4 := _205
// value4 := _186
// }
// function abi_encode_tuple_t_bytes32_t_address_t_uint256_t_bytes32_t_enum$_Operation_$1949_t_uint256_t_uint256_t_uint256_t_address_t_address_t_uint256__to_t_bytes32_t_address_t_uint256_t_bytes32_t_uint8_t_uint256_t_uint256_t_uint256_t_address_t_address_t_uint256_(headStart_252, value10_253, value9_254, value8_255, value7_256, value6_257, value5_258, value4_259, value3_260, value2_261, value1_262, value0_263) -> tail_264
// {
// tail_264 := add(headStart_252, 352)
// mstore(headStart_252, value0_263)
// let _409 := 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
// mstore(add(headStart_252, 32), and(value1_262, _409))
// let _382 := 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF
// mstore(add(headStart_252, 32), and(value1_262, _382))
// mstore(add(headStart_252, 64), value2_261)
// mstore(add(headStart_252, 96), value3_260)
// if iszero(lt(value4_259, 3))
@ -1137,8 +1137,8 @@
// mstore(add(headStart_252, 160), value5_258)
// mstore(add(headStart_252, 192), value6_257)
// mstore(add(headStart_252, 224), value7_256)
// mstore(add(headStart_252, 256), and(value8_255, _409))
// mstore(add(headStart_252, 288), and(value9_254, _409))
// mstore(add(headStart_252, 256), and(value8_255, _382))
// mstore(add(headStart_252, 288), and(value9_254, _382))
// mstore(add(headStart_252, 320), value10_253)
// }
// }

52
test/libyul/yulOptimizerTests/fullSuite/abi_example1.yul
View File

@ -460,12 +460,12 @@
// {
// let _1 := 0x20
// let _2 := 0
// let _218 := mload(_2)
// let _168 := mload(_2)
// let abi_encode_pos := _1
// let abi_encode_length_68 := mload(_218)
// let abi_encode_length_68 := mload(_168)
// mstore(_1, abi_encode_length_68)
// abi_encode_pos := 64
// let abi_encode_srcPtr := add(_218, _1)
// let abi_encode_srcPtr := add(_168, _1)
// let abi_encode_i_69 := _2
// for {
// }
@ -474,45 +474,45 @@
// abi_encode_i_69 := add(abi_encode_i_69, 1)
// }
// {
// let _579 := mload(abi_encode_srcPtr)
// let abi_encode_pos_71_671 := abi_encode_pos
// let abi_encode_srcPtr_73_673 := _579
// let abi_encode_i_74_674 := _2
// let _491 := mload(abi_encode_srcPtr)
// let abi_encode_pos_71_583 := abi_encode_pos
// let abi_encode_srcPtr_73_585 := _491
// let abi_encode_i_74_586 := _2
// for {
// }
// lt(abi_encode_i_74_674, 0x3)
// lt(abi_encode_i_74_586, 0x3)
// {
// abi_encode_i_74_674 := add(abi_encode_i_74_674, 1)
// abi_encode_i_74_586 := add(abi_encode_i_74_586, 1)
// }
// {
// mstore(abi_encode_pos_71_671, and(mload(abi_encode_srcPtr_73_673), 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))
// abi_encode_srcPtr_73_673 := add(abi_encode_srcPtr_73_673, _1)
// abi_encode_pos_71_671 := add(abi_encode_pos_71_671, _1)
// mstore(abi_encode_pos_71_583, and(mload(abi_encode_srcPtr_73_585), 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF))
// abi_encode_srcPtr_73_585 := add(abi_encode_srcPtr_73_585, _1)
// abi_encode_pos_71_583 := add(abi_encode_pos_71_583, _1)
// }
// abi_encode_srcPtr := add(abi_encode_srcPtr, _1)
// abi_encode_pos := add(abi_encode_pos, 0x60)
// }
// let _220 := mload(64)
// let _221 := mload(_1)
// if slt(sub(_220, _221), 128)
// let _170 := mload(64)
// let _171 := mload(_1)
// if slt(sub(_170, _171), 128)
// {
// revert(_2, _2)
// }
// let abi_decode_offset_64 := calldataload(add(_221, 64))
// let abi_decode_offset_64 := calldataload(add(_171, 64))
// let abi_decode__74 := 0xffffffffffffffff
// if gt(abi_decode_offset_64, abi_decode__74)
// {
// revert(_2, _2)
// }
// let abi_decode_value2_314 := abi_decode_t_array$_t_uint256_$dyn_memory_ptr(add(_221, abi_decode_offset_64), _220)
// let abi_decode_offset_65 := calldataload(add(_221, 96))
// let abi_decode_value2_264 := abi_decode_t_array$_t_uint256_$dyn_memory_ptr(add(_171, abi_decode_offset_64), _170)
// let abi_decode_offset_65 := calldataload(add(_171, 96))
// if gt(abi_decode_offset_65, abi_decode__74)
// {
// revert(_2, _2)
// }
// let abi_decode_value3_315 := abi_decode_t_array$_t_array$_t_uint256_$2_memory_$dyn_memory_ptr(add(_221, abi_decode_offset_65), _220)
// sstore(calldataload(_221), calldataload(add(_221, _1)))
// sstore(abi_decode_value2_314, abi_decode_value3_315)
// let abi_decode_value3_265 := abi_decode_t_array$_t_array$_t_uint256_$2_memory_$dyn_memory_ptr(add(_171, abi_decode_offset_65), _170)
// sstore(calldataload(_171), calldataload(add(_171, _1)))
// sstore(abi_decode_value2_264, abi_decode_value3_265)
// sstore(_2, abi_encode_pos)
// function abi_decode_t_array$_t_array$_t_uint256_$2_memory_$dyn_memory_ptr(offset_3, end_4) -> array_5
// {
@ -544,10 +544,10 @@
// revert(0, 0)
// }
// let abi_decode_dst_15 := allocateMemory(array_allocation_size_t_array$_t_uint256_$2_memory(0x2))
// let abi_decode_dst_15_1154 := abi_decode_dst_15
// let abi_decode_dst_15_990 := abi_decode_dst_15
// let abi_decode_src_16 := src_8
// let abi_decode__238 := add(src_8, 0x40)
// if gt(abi_decode__238, end_4)
// let abi_decode__188 := add(src_8, 0x40)
// if gt(abi_decode__188, end_4)
// {
// revert(0, 0)
// }
@ -563,9 +563,9 @@
// abi_decode_dst_15 := add(abi_decode_dst_15, _16)
// abi_decode_src_16 := add(abi_decode_src_16, _16)
// }
// mstore(dst_7, abi_decode_dst_15_1154)
// mstore(dst_7, abi_decode_dst_15_990)
// dst_7 := add(dst_7, _16)
// src_8 := abi_decode__238
// src_8 := abi_decode__188
// }
// }
// function abi_decode_t_array$_t_uint256_$dyn_memory_ptr(offset_27, end_28) -> array_29

83
test/libyul/yulOptimizerTests/fullSuite/aztec.yul
View File

@ -234,10 +234,8 @@
// let validateJo__6 := 0x80
// mstore(validateJo__6, 7673901602397024137095011250362199966051872585513276903826533215767972925880)
// mstore(0xa0, 8489654445897228341090914135473290831551238522473825886865492707826370766375)
// let validateJo__10 := calldataload(0x04)
// let validateJo_notes := add(0x04, validateJo__10)
// let validateJo_m := calldataload(0x24)
// let validateJo_n := calldataload(validateJo_notes)
// let validateJo_n := calldataload(add(0x04, calldataload(0x04)))
// let validateJo_gen_order := 0x30644e72e131a029b85045b68181585d2833e84879b9709143e1f593f0000001
// let validateJo_challenge := mod(calldataload(0x44), validateJo_gen_order)
// if gt(validateJo_m, validateJo_n)
@ -246,15 +244,14 @@
// revert(0x00, 0x20)
// }
// let validateJo_kn := calldataload(add(calldatasize(), 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff40))
// let validateJo__24 := 0x2a0
// mstore(validateJo__24, caller())
// mstore(0x2a0, caller())
// mstore(0x2c0, validateJo_kn)
// mstore(0x2e0, validateJo_m)
// validateJo_kn := mulmod(sub(validateJo_gen_order, validateJo_kn), validateJo_challenge, validateJo_gen_order)
// hashCommitments(validateJo_notes, validateJo_n)
// hashCommitments(add(0x04, calldataload(0x04)), validateJo_n)
// let validateJo_b := add(0x300, mul(validateJo_n, validateJo__6))
// let validateJo_i := 0
// let validateJo_i_1306 := validateJo_i
// let validateJo_i_1218 := validateJo_i
// for {
// }
// lt(validateJo_i, validateJo_n)
@ -262,14 +259,11 @@
// validateJo_i := add(validateJo_i, 0x01)
// }
// {
// let validateJo__34 := 0x20
// let validateJo__351 := add(validateJo__10, mul(validateJo_i, 0xc0))
// let validateJo_noteIndex := add(validateJo__351, 0x24)
// let validateJo_k := validateJo_i_1306
// let validateJo_a := calldataload(add(validateJo__351, 0x44))
// let validateJo__329 := add(calldataload(0x04), mul(validateJo_i, 0xc0))
// let validateJo_k := validateJo_i_1218
// let validateJo_a := calldataload(add(validateJo__329, 0x44))
// let validateJo_c := validateJo_challenge
// let validateJo__39 := add(validateJo_i, 0x01)
// switch eq(validateJo__39, validateJo_n)
// switch eq(add(validateJo_i, 0x01), validateJo_n)
// case 1 {
// validateJo_k := validateJo_kn
// if eq(validateJo_m, validateJo_n)
@ -278,55 +272,50 @@
// }
// }
// case 0 {
// validateJo_k := calldataload(validateJo_noteIndex)
// validateJo_k := calldataload(add(validateJo__329, 0x24))
// }
// validateCommitment(validateJo_noteIndex, validateJo_k, validateJo_a)
// switch gt(validateJo__39, validateJo_m)
// validateCommitment(add(validateJo__329, 0x24), validateJo_k, validateJo_a)
// switch gt(add(validateJo_i, 0x01), validateJo_m)
// case 1 {
// validateJo_kn := addmod(validateJo_kn, sub(validateJo_gen_order, validateJo_k), validateJo_gen_order)
// let validateJo_x := mod(mload(validateJo_i_1306), validateJo_gen_order)
// let validateJo_x := mod(mload(validateJo_i_1218), validateJo_gen_order)
// validateJo_k := mulmod(validateJo_k, validateJo_x, validateJo_gen_order)
// validateJo_a := mulmod(validateJo_a, validateJo_x, validateJo_gen_order)
// validateJo_c := mulmod(validateJo_challenge, validateJo_x, validateJo_gen_order)
// mstore(validateJo_i_1306, keccak256(validateJo_i_1306, validateJo__34))
// mstore(validateJo_i_1218, keccak256(validateJo_i_1218, 0x20))
// }
// case 0 {
// validateJo_kn := addmod(validateJo_kn, validateJo_k, validateJo_gen_order)
// }
// let validateJo__52 := 0x40
// calldatacopy(0xe0, add(validateJo__351, 164), validateJo__52)
// calldatacopy(validateJo__34, add(validateJo__351, 100), validateJo__52)
// let validateJo__61 := 0x120
// mstore(validateJo__61, sub(validateJo_gen_order, validateJo_c))
// let validateJo__62 := 0x60
// mstore(validateJo__62, validateJo_k)
// calldatacopy(0xe0, add(validateJo__329, 164), validateJo__52)
// calldatacopy(0x20, add(validateJo__329, 100), validateJo__52)
// mstore(0x120, sub(validateJo_gen_order, validateJo_c))
// mstore(0x60, validateJo_k)
// mstore(0xc0, validateJo_a)
// let validateJo__65 := 0x1a0
// let validateJo_result := call(gas(), 7, validateJo_i_1306, 0xe0, validateJo__62, validateJo__65, validateJo__52)
// let validateJo_result_303 := and(validateJo_result, call(gas(), 7, validateJo_i_1306, validateJo__34, validateJo__62, validateJo__61, validateJo__52))
// let validateJo__80 := 0x160
// let validateJo_result_304 := and(validateJo_result_303, call(gas(), 7, validateJo_i_1306, validateJo__6, validateJo__62, validateJo__80, validateJo__52))
// let validateJo_result_305 := and(validateJo_result_304, call(gas(), 6, validateJo_i_1306, validateJo__61, validateJo__6, validateJo__80, validateJo__52))
// validateJo_result := and(validateJo_result_305, call(gas(), 6, validateJo_i_1306, validateJo__80, validateJo__6, validateJo_b, validateJo__52))
// let validateJo_result := call(gas(), 7, validateJo_i_1218, 0xe0, 0x60, 0x1a0, validateJo__52)
// let validateJo_result_303 := and(validateJo_result, call(gas(), 7, validateJo_i_1218, 0x20, 0x60, 0x120, validateJo__52))
// let validateJo_result_304 := and(validateJo_result_303, call(gas(), 7, validateJo_i_1218, validateJo__6, 0x60, 0x160, validateJo__52))
// let validateJo_result_305 := and(validateJo_result_304, call(gas(), 6, validateJo_i_1218, 0x120, validateJo__6, 0x160, validateJo__52))
// validateJo_result := and(validateJo_result_305, call(gas(), 6, validateJo_i_1218, 0x160, validateJo__6, validateJo_b, validateJo__52))
// if eq(validateJo_i, validateJo_m)
// {
// mstore(0x260, mload(validateJo__34))
// mstore(0x260, mload(0x20))
// mstore(0x280, mload(validateJo__52))
// mstore(0x1e0, mload(0xe0))
// mstore(0x200, sub(0x30644e72e131a029b85045b68181585d97816a916871ca8d3c208c16d87cfd47, mload(0x100)))
// }
// if gt(validateJo_i, validateJo_m)
// {
// mstore(validateJo__62, validateJo_c)
// let validateJo__120 := 0x220
// let validateJo_result_307 := and(validateJo_result, call(gas(), 7, validateJo_i_1306, validateJo__34, validateJo__62, validateJo__120, validateJo__52))
// let validateJo_result_308 := and(validateJo_result_307, call(gas(), 6, validateJo_i_1306, validateJo__120, validateJo__6, 0x260, validateJo__52))
// validateJo_result := and(validateJo_result_308, call(gas(), 6, validateJo_i_1306, validateJo__65, validateJo__6, 0x1e0, validateJo__52))
// mstore(0x60, validateJo_c)
// let validateJo_result_307 := and(validateJo_result, call(gas(), 7, validateJo_i_1218, 0x20, 0x60, 0x220, validateJo__52))
// let validateJo_result_308 := and(validateJo_result_307, call(gas(), 6, validateJo_i_1218, 0x220, validateJo__6, 0x260, validateJo__52))
// validateJo_result := and(validateJo_result_308, call(gas(), 6, validateJo_i_1218, 0x1a0, validateJo__6, 0x1e0, validateJo__52))
// }
// if iszero(validateJo_result)
// {
// mstore(validateJo_i_1306, 400)
// revert(validateJo_i_1306, validateJo__34)
// mstore(validateJo_i_1218, 400)
// revert(validateJo_i_1218, 0x20)
// }
// validateJo_b := add(validateJo_b, validateJo__52)
// }
@ -334,15 +323,15 @@
// {
// validatePairing(0x64)
// }
// if iszero(eq(mod(keccak256(validateJo__24, add(validateJo_b, 0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd60)), validateJo_gen_order), validateJo_challenge))
// if iszero(eq(mod(keccak256(0x2a0, add(validateJo_b, 0xfffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd60)), validateJo_gen_order), validateJo_challenge))
// {
// mstore(validateJo_i_1306, 404)
// revert(validateJo_i_1306, 0x20)
// mstore(validateJo_i_1218, 404)
// revert(validateJo_i_1218, 0x20)
// }
// mstore(validateJo_i_1306, 0x01)
// return(validateJo_i_1306, 0x20)
// mstore(validateJo_i_1306, 404)
// revert(validateJo_i_1306, 0x20)
// mstore(validateJo_i_1218, 0x01)
// return(validateJo_i_1218, 0x20)
// mstore(validateJo_i_1218, 404)
// revert(validateJo_i_1218, 0x20)
// function validatePairing(t2)
// {
// let t2_x_1 := calldataload(t2)

6
test/libyul/yulOptimizerTests/fullSuite/medium.yul
View File

@ -21,8 +21,8 @@
// {
// let allocate__19 := 0x40
// mstore(allocate__19, add(mload(allocate__19), 0x20))
// let allocate_p_35_39 := mload(allocate__19)
// mstore(allocate__19, add(allocate_p_35_39, allocate__19))
// mstore(add(allocate_p_35_39, 96), 2)
// let allocate_p_33_37 := mload(allocate__19)
// mstore(allocate__19, add(allocate_p_33_37, allocate__19))
// mstore(add(allocate_p_33_37, 96), 2)
// mstore(allocate__19, 0x20)
// }

10
test/libyul/yulOptimizerTests/stackCompressor/inlineInBlock.yul Normal file
View File

@ -0,0 +1,10 @@
{
let x := 8
let y := calldataload(calldataload(9))
mstore(y, add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(y, 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1))
}
// ----
// stackCompressor
// {
// mstore(calldataload(calldataload(9)), add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(calldataload(calldataload(9)), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1))
// }

16
test/libyul/yulOptimizerTests/stackCompressor/inlineInFunction.yul Normal file
View File

@ -0,0 +1,16 @@
{
let x := 8
function f() {
let y := calldataload(calldataload(9))
mstore(y, add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(y, 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1))
}
}
// ----
// stackCompressor
// {
// let x := 8
// function f()
// {
// mstore(calldataload(calldataload(9)), add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(add(calldataload(calldataload(9)), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1), 1))
// }
// }

13
test/libyul/yulOptimizerTests/stackCompressor/noInline.yul Normal file
View File

@ -0,0 +1,13 @@
{
let x := 8
function f() { let y := 9 }
}
// ----
// stackCompressor
// {
// let x := 8
// function f()
// {
// let y := 9
// }
// }

7
test/tools/yulopti.cpp
View File

@ -48,6 +48,7 @@
#include <libyul/optimiser/RedundantAssignEliminator.h>
#include <libyul/optimiser/SSAReverser.h>
#include <libyul/optimiser/SSATransform.h>
#include <libyul/optimiser/StackCompressor.h>
#include <libyul/optimiser/StructuralSimplifier.h>
#include <libyul/optimiser/VarDeclInitializer.h>
@ -130,7 +131,8 @@ public:
cout << "(q)quit/(f)flatten/(c)se/initialize var(d)ecls/(x)plit/(j)oin/(g)rouper/(h)oister/" << endl;
cout << " (e)xpr inline/(i)nline/(s)implify/(u)nusedprune/ss(a) transform/" << endl;
cout << " (r)edundant assign elim./re(m)aterializer/f(o)r-loop-pre-rewriter/" << endl;
cout << " s(t)ructural simplifier/equi(v)alent function combiner/ssa re(V)erser? " << endl;
cout << " s(t)ructural simplifier/equi(v)alent function combiner/ssa re(V)erser/? " << endl;
cout << " stack com(p)ressor? " << endl;
cout.flush();
int option = readStandardInputChar();
cout << ' ' << char(option) << endl;
@ -192,6 +194,9 @@ public:
case 'V':
SSAReverser::run(*m_ast);
break;
case 'p':
StackCompressor::run(m_dialect, *m_ast);
break;
default:
cout << "Unknown option." << endl;
}