[PATCH] D76514: [ARM] Avoid pointless vrev of element-wise vmov

[John Brawn via Phabricator via llvm-commits]

john.brawn created this revision.
john.brawn added reviewers: dmgreen, simon_tatham, SjoerdMeijer.
Herald added subscribers: hiraditya, kristof.beyls.
Herald added a project: LLVM.

If we have an element-wise vmov immediate instruction then a subsequent vrev with width greater or equal to the vmov element width, then that vrev won't do anything. Add patterns to avoid inserting such vrevs when generating big-endian code.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D76514

Files:
  llvm/lib/Target/ARM/ARMInstrNEON.td
  llvm/test/CodeGen/ARM/vmov.ll

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