[PATCH] D66580: [ARM] Fold VPNOT into vpt blocks

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: t.p.northover, samparker, SjoerdMeijer, simon_tatham, ostannard.
Herald added subscribers: hiraditya, kristof.beyls, javed.absar.
Herald added a project: LLVM.

We can fold a VPNOT into a predicate block, inverting the predicate to create "else" predicated instructions. This teaches the MVEVPTBlockPass to do that, updating the mask and instruction predicates  of instructions following a VPNOT, and removing the VPNOT.


https://reviews.llvm.org/D66580

Files:
  llvm/lib/Target/ARM/MVEVPTBlockPass.cpp
  llvm/test/CodeGen/Thumb2/mve-masked-load.ll
  llvm/test/CodeGen/Thumb2/mve-pred-not.ll
  llvm/test/CodeGen/Thumb2/mve-vpt-block.mir
  llvm/test/CodeGen/Thumb2/mve-vpt-block2.mir
  llvm/test/CodeGen/Thumb2/mve-vpt-block4.mir
  llvm/test/CodeGen/Thumb2/mve-vpt-block5.mir
  llvm/test/CodeGen/Thumb2/mve-vpt-block6.mir
  llvm/test/CodeGen/Thumb2/mve-vpt-block7.mir
  llvm/test/CodeGen/Thumb2/mve-vpt-nots.mir

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