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[SILOptimizer] Do not devirtualize instructions when dynamic dispatch is required #6799

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Merged
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Jan 14, 2017
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[SILOptimizer] Do not devirtualize instructions when dynamic dispatch is required #6799

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5 changes: 5 additions & 0 deletions lib/SILOptimizer/Utils/Devirtualize.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -561,6 +561,11 @@ bool swift::canDevirtualizeClassMethod(FullApplySite AI,
return false;
}

if (MI->isVolatile()) {
// dynamic dispatch is semantically required, can't devirtualize
return false;
}

// Type of the actual function to be called.
CanSILFunctionType GenCalleeType = F->getLoweredFunctionType();

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