Simon Pilgrim 4e3ba526bf [X86] Add tests showing failure to fold MOVMSK(CMPEQ(AND(X,C1),0)) -> MOVMSK(NOT(SHL(X,C2)))
This would allow pow2 mask tests to avoid an unnecessary constant load.

Noticed while investigating how to extend MatchVectorAllZeroTest to support more allof/anyof patterns.
2022-01-30 15:42:59 +00:00
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