[PATCH] D67219: [ARM] Fixup the creation of VPT blocks

[Dave Green via Phabricator via llvm-commits]

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

This attempts to just fix the creation of VPT blocks, fixing up the iterating, which instructions are considered in the bundle, and making sure that we do not overrun the end of the block.

It is, to an extent, pulled out of D66580 <https://reviews.llvm.org/D66580> to make that simpler. It does not attempt to optimise VPNOT's like that patch does.


https://reviews.llvm.org/D67219

Files:
  llvm/lib/Target/ARM/MVEVPTBlockPass.cpp
  llvm/test/CodeGen/Thumb2/mve-masked-load.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-block8.mir
  llvm/test/CodeGen/Thumb2/mve-vpt-nots.mir

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