[PATCH] D108900: [LV] Fix crash for reverse masked interleaved groups

[Ayal Zaks via Phabricator via llvm-commits]

Ayal created this revision.
Ayal added reviewers: fhahn, uabelho.
Herald added a subscriber: hiraditya.
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This patch fixes another crash revealed by PR51614:
when *deciding* to vectorize with masked interleave groups, check if the access
is reverse - which is currently not supported; rather than (only) asserting it is so
when computing cost and generating code.

(Currently includes D108891 <https://reviews.llvm.org/D108891>; the two can be committed separately or together.)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D108900

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Transforms/LoopVectorize/X86/x86-interleaved-accesses-masked-group.ll
  llvm/test/Transforms/LoopVectorize/pr51614-fold-tail-by-masking.ll

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