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Fix unused pruner.

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This commit is contained in:
chriseth 2019-05-29 23:23:51 +02:00
parent 5fd9264dcd
commit aed979604c
1 changed files with 4 additions and 5 deletions
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9
libyul/optimiser/UnusedPruner.cpp
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@ -25,6 +25,7 @@
#include <libyul/optimiser/OptimizerUtilities.h>
#include <libyul/Exceptions.h>
#include <libyul/AsmData.h>
#include <libyul/Dialect.h>
#include <boost/algorithm/cxx11/none_of.hpp>
@ -92,12 +93,10 @@ void UnusedPruner::operator()(Block& _block)
subtractReferences(ReferencesCounter::countReferences(*varDecl.value));
statement = Block{std::move(varDecl.location), {}};
}
else if (varDecl.variables.size() == 1)
// In pure Yul, this should be replaced by a function call to `drop`
// instead of `pop`.
statement = ExpressionStatement{varDecl.location, FunctionalInstruction{
else if (varDecl.variables.size() == 1 && m_dialect.discardFunction())
statement = ExpressionStatement{varDecl.location, FunctionCall{
varDecl.location,
dev::eth::Instruction::POP,
{varDecl.location, m_dialect.discardFunction()->name},
{*std::move(varDecl.value)}
}};
}