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Introduce LiteralRematerializer and thus simplify StructuralSimplifier.

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chriseth
2019-09-11 19:50:24 +02:00
parent a064e0fc97
commit fcfe829534
10 changed files with 152 additions and 145 deletions
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libyul/optimiser/Rematerialiser.cpp
+19 -2
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@@ -71,9 +71,9 @@ void Rematerialiser::visit(Expression& _e)
if (_e.type() == typeid(Identifier))
{
Identifier& identifier = boost::get<Identifier>(_e);
if (m_value.count(identifier.name))
YulString name = identifier.name;
if (m_value.count(name))
{
YulString name = identifier.name;
assertThrow(m_value.at(name), OptimizerException, "");
auto const& value = *m_value.at(name);
size_t refs = m_referenceCounts[name];
@@ -93,3 +93,20 @@ void Rematerialiser::visit(Expression& _e)
}
DataFlowAnalyzer::visit(_e);
}
void LiteralRematerialiser::visit(Expression& _e)
{
if (_e.type() == typeid(Identifier))
{
Identifier& identifier = boost::get<Identifier>(_e);
YulString name = identifier.name;
if (m_value.count(name))
{
Expression const* value = m_value.at(name);
assertThrow(value, OptimizerException, "");
if (value->type() == typeid(Literal))
_e = *value;
}
}
DataFlowAnalyzer::visit(_e);
}