[PATCH] D104860: [ARM] Fold extract of ARM_BUILD_VECTOR

[Dave Green via Phabricator via llvm-commits]

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

For some reason, the ARM backend thinks it needs it's own BUILDVECTOR. This adds a small fold for extract (ARM_BUILD_VECTOR) to fold to the original node. This can help simplify the resulting codegen in some cases.


https://reviews.llvm.org/D104860

Files:
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/test/CodeGen/Thumb2/mve-shuffle.ll
  llvm/test/CodeGen/Thumb2/mve-soft-float-abi.ll
  llvm/test/CodeGen/Thumb2/mve-vld3.ll
  llvm/test/CodeGen/Thumb2/mve-vld4.ll
  llvm/test/CodeGen/Thumb2/mve-vmull-splat.ll
  llvm/test/CodeGen/Thumb2/mve-vst3.ll
  llvm/test/CodeGen/Thumb2/mve-vst4.ll

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