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chriseth
2019-02-11 15:48:29 +01:00
parent 5a34743d88
commit 83083d2208
12 changed files with 282 additions and 49 deletions
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libyul/optimiser/Rematerialiser.cpp
+23 -9
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@@ -30,25 +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);
}
void Rematerialiser::run(Dialect const& _dialect, FunctionDefinition& _function)
void Rematerialiser::run(
Dialect const& _dialect,
FunctionDefinition& _function,
set<YulString> _varsToAlwaysRematerialize
)
{
Rematerialiser{_dialect, _function}(_function);
Rematerialiser{_dialect, _function, std::move(_varsToAlwaysRematerialize)}(_function);
}
Rematerialiser::Rematerialiser(Dialect const& _dialect, Block& _ast):
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):
Rematerialiser::Rematerialiser(
Dialect const& _dialect,
FunctionDefinition& _function,
set<YulString> _varsToAlwaysRematerialize
):
DataFlowAnalyzer(_dialect),
m_referenceCounts(ReferencesCounter::countReferences(_function))
m_referenceCounts(ReferencesCounter::countReferences(_function)),
m_varsToAlwaysRematerialize(std::move(_varsToAlwaysRematerialize))
{
}
@@ -64,7 +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])