Simon Pilgrim 2cdbaca394 [X86] Attempt to fold MOVMSK(CMPEQ(AND(X,C1),0)) -> MOVMSK(NOT(SHL(X,C2))) ...

Allows 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 15:53:21 +00:00

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