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Split MovableChecker and introduce SideEffectsUpToMSize.

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chriseth
2019-05-28 12:54:32 +02:00
parent b95eebee1c
commit afe887adc1
7 changed files with 124 additions and 60 deletions
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libyul/optimiser/Semantics.cpp
+53 -31
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@@ -33,9 +33,59 @@ using namespace std;
using namespace dev;
using namespace yul;
MovableChecker::MovableChecker(Dialect const& _dialect):
m_dialect(_dialect)
SideEffectsCollector::SideEffectsCollector(Dialect const& _dialect, Expression const& _expression):
SideEffectsCollector(_dialect)
{
visit(_expression);
}
SideEffectsCollector::SideEffectsCollector(Dialect const& _dialect, Statement const& _statement):
SideEffectsCollector(_dialect)
{
visit(_statement);
}
SideEffectsCollector::SideEffectsCollector(Dialect const& _dialect, Block const& _ast):
SideEffectsCollector(_dialect)
{
operator()(_ast);
}
void SideEffectsCollector::operator()(FunctionalInstruction const& _instr)
{
ASTWalker::operator()(_instr);
if (!eth::SemanticInformation::movable(_instr.instruction))
m_movable = false;
if (!eth::SemanticInformation::sideEffectFree(_instr.instruction))
m_sideEffectFree = false;
if (!eth::SemanticInformation::sideEffectFreeIfNoMSize(_instr.instruction))
m_sideEffectFreeIfNoMSize = false;
if (_instr.instruction == eth::Instruction::MSIZE)
m_containsMSize = true;
}
void SideEffectsCollector::operator()(FunctionCall const& _functionCall)
{
ASTWalker::operator()(_functionCall);
if (BuiltinFunction const* f = m_dialect.builtin(_functionCall.functionName.name))
{
if (!f->movable)
m_movable = false;
if (!f->sideEffectFree)
m_sideEffectFree = false;
if (!f->sideEffectFreeIfNoMSize)
m_sideEffectFreeIfNoMSize = false;
if (f->isMSize)
m_containsMSize = true;
}
else
{
m_movable = false;
m_sideEffectFree = false;
m_sideEffectFreeIfNoMSize = false;
}
}
MovableChecker::MovableChecker(Dialect const& _dialect, Expression const& _expression):
@@ -46,38 +96,10 @@ MovableChecker::MovableChecker(Dialect const& _dialect, Expression const& _expre
void MovableChecker::operator()(Identifier const& _identifier)
{
ASTWalker::operator()(_identifier);
SideEffectsCollector::operator()(_identifier);
m_variableReferences.emplace(_identifier.name);
}
void MovableChecker::operator()(FunctionalInstruction const& _instr)
{
ASTWalker::operator()(_instr);
if (!eth::SemanticInformation::movable(_instr.instruction))
m_movable = false;
if (!eth::SemanticInformation::sideEffectFree(_instr.instruction))
m_sideEffectFree = false;
}
void MovableChecker::operator()(FunctionCall const& _functionCall)
{
ASTWalker::operator()(_functionCall);
if (BuiltinFunction const* f = m_dialect.builtin(_functionCall.functionName.name))
{
if (!f->movable)
m_movable = false;
if (!f->sideEffectFree)
m_sideEffectFree = false;
}
else
{
m_movable = false;
m_sideEffectFree = false;
}
}
void MovableChecker::visit(Statement const&)
{
assertThrow(false, OptimizerException, "Movability for statement requested.");