[PATCH] D100435: [ARM] Transforming memset to Tail predicated Loop

[Malhar via Phabricator via llvm-commits]

malharJ created this revision.
malharJ added a reviewer: dmgreen.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
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This patch converts llvm.memcpy intrinsic into Tail Predicated
Hardware loops for a target that supports the Arm M-profile
Vector Extension (MVE).

The llvm.memset intrinsic is converted to a TP loop for both
constant and non-constant input sizes (of llvm.memset).

Depends on D100376 <https://reviews.llvm.org/D100376>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D100435

Files:
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/lib/Target/ARM/ARMISelLowering.h
  llvm/lib/Target/ARM/ARMInstrMVE.td
  llvm/lib/Target/ARM/ARMSelectionDAGInfo.cpp
  llvm/test/CodeGen/Thumb2/LowOverheadLoops/memcall.ll
  llvm/test/CodeGen/Thumb2/mve-gather-scatter-optimisation.ll
  llvm/test/CodeGen/Thumb2/mve-phireg.ll
  llvm/test/CodeGen/Thumb2/mve_tp_loop.ll
  llvm/test/CodeGen/Thumb2/mve_tp_loop.mir

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