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Author SHA1 Message Date
David Green
bd1a4c8565 [ValueTracking] Teach isKnownNonZero that a vscale is never 0. 
A llvm.vscale will always be at least 1, never zero. Teaching that to
isKnownNonZero can help fold away some statically known compares.

Differential Revision: https://reviews.llvm.org/D128217
 2022-06-23 15:25:24 +01:00