[PATCH] D72509: [ARM][LowOverheadLoops] Allow all MVE instrs.

[Sam Parker via Phabricator via llvm-commits]

samparker created this revision.
samparker added reviewers: SjoerdMeijer, dmgreen.
Herald added subscribers: hiraditya, kristof.beyls.
Herald added a project: LLVM.
samparker added a parent revision: D72504: [ARM][LowOverheadLoops] Change predicate inspection.

We have a whitelist of instructions that we allow when tail predicating, since these are trivial ones that we've deemed need no special handling. Now change ARMLowOverheadLoops to allow the non-trivial instructions if they're contained within a valid VPT block. Since a valid block is one that is predicated upon the VCTP so we know that these non-trivial instructions will still behave as expected once the implicit predication is used instead.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D72509

Files:
  llvm/lib/Target/ARM/ARMLowOverheadLoops.cpp
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/add_reduce.mir
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/vmldava_in_vpt.mir

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