[PATCH] D88834: [InstCombine] matchRotate - add support for matching general funnel shifts with constant shift amounts (PR46896)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon created this revision.
RKSimon added reviewers: spatel, lebedev.ri, nikic.
Herald added a subscriber: hiraditya.
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First step towards extending the existing rotation support to full funnel shift handling now that the backend legalization support has improved.

This enables us to match the shift by constant cases, which are pretty trivial to expand again if necessary.

D88420 <https://reviews.llvm.org/D88420> will add non-uniform support for funnel shifts as well once its been finalized.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D88834

Files:
  llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
  llvm/test/Transforms/InstCombine/funnel.ll

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