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Merge pull request #12902 from a3d4/fix-msvc-debug-stack-crash

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Fix MSVC Debug crash
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Daniel Kirchner 2022-04-06 20:34:44 +02:00 committed by GitHub
commit 31b5485779
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1 changed files with 24 additions and 19 deletions
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43
libyul/optimiser/StructuralSimplifier.cpp
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@ -93,26 +93,31 @@ void StructuralSimplifier::operator()(Block& _block)
void StructuralSimplifier::simplify(std::vector<yul::Statement>& _statements)
{
util::GenericVisitor visitor{
util::VisitorFallback<OptionalStatements>{},
[&](If& _ifStmt) -> OptionalStatements {
if (expressionAlwaysTrue(*_ifStmt.condition))
return {std::move(_ifStmt.body.statements)};
else if (expressionAlwaysFalse(*_ifStmt.condition))
return {vector<Statement>{}};
return {};
},
[&](Switch& _switchStmt) -> OptionalStatements {
if (std::optional<u256> const constExprVal = hasLiteralValue(*_switchStmt.expression))
return replaceConstArgSwitch(_switchStmt, constExprVal.value());
return {};
},
[&](ForLoop& _forLoop) -> OptionalStatements {
if (expressionAlwaysFalse(*_forLoop.condition))
return {std::move(_forLoop.pre.statements)};
return {};
}
// Explicit local variables ifLambda, switchLambda, forLoopLambda are created to avoid MSVC C++17 Debug test crash
// (Run-Time Check Failure #2 - Stack around the variable '....' was corrupted).
// As soon as the issue is fixed, this workaround can be removed.
auto ifLambda = [&](If& _ifStmt) -> OptionalStatements
{
if (expressionAlwaysTrue(*_ifStmt.condition))
return {std::move(_ifStmt.body.statements)};
else if (expressionAlwaysFalse(*_ifStmt.condition))
return {vector<Statement>{}};
return {};
};
auto switchLambda = [&](Switch& _switchStmt) -> OptionalStatements
{
if (std::optional<u256> const constExprVal = hasLiteralValue(*_switchStmt.expression))
return replaceConstArgSwitch(_switchStmt, constExprVal.value());
return {};
};
auto forLoopLambda = [&](ForLoop& _forLoop) -> OptionalStatements
{
if (expressionAlwaysFalse(*_forLoop.condition))
return {std::move(_forLoop.pre.statements)};
return {};
};
util::GenericVisitor visitor{util::VisitorFallback<OptionalStatements>{}, ifLambda, switchLambda, forLoopLambda};
util::iterateReplacing(
_statements,