[PATCH] D99427: [LoopIdiomRecognize] Teach CTLZ/CTTZ idiom recognition to handle not being able to find a pre-loop check for the input being 0.

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

Hm, i've just completed mine's `recognizeShiftUntilZero()`, and i thought it would resolve this,
but there the shifee is stationary, while here we have shift recurrence (always shift by one).
So more idioms to support...


Repository:
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https://reviews.llvm.org/D99427