[PATCH] D103808: [ARM] Generate VDUP(Const) from constant buildvectors

[Dave Green via Phabricator via llvm-commits]

dmgreen created this revision.
dmgreen added reviewers: samtebbs, NickGuy, SjoerdMeijer, ostannard, simon_tatham.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
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Herald added a project: LLVM.

If we cannot otherwise use a VMOVimm/VMOVFPimm/VMVNimm, fall back to producing a VDUP(const) as opposed to a constant pool load. This will at least be smaller codesize and can allow the VDUP to be folded into other instructions.


https://reviews.llvm.org/D103808

Files:
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/predicated-liveout-unknown-lanes.ll
  llvm/test/CodeGen/Thumb2/mve-fp16convertloops.ll
  llvm/test/CodeGen/Thumb2/mve-gather-scatter-tailpred.ll
  llvm/test/CodeGen/Thumb2/mve-pred-vctpvpsel.ll
  llvm/test/CodeGen/Thumb2/mve-shifts.ll
  llvm/test/CodeGen/Thumb2/mve-vmovimm.ll
  llvm/test/CodeGen/Thumb2/mve-vmvnimm.ll

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