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Commit c8a576b5 authored by David Majnemer's avatar David Majnemer
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InstCombine: Detect when llvm.umul.with.overflow always overflows 

We know overflow always occurs if both ~LHSKnownZero * ~RHSKnownZero
and LHSKnownOne * RHSKnownOne overflow.

llvm-svn: 225077
parent 491331ac
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