[PATCH] D70841: [ARM][MVE] Sink vector shift operand

[Sam Parker via Phabricator via llvm-commits]

samparker created this revision.
samparker added reviewers: dmgreen, SjoerdMeijer, simon_tatham.
Herald added subscribers: hiraditya, kristof.beyls.
Herald added a project: LLVM.

The shift amount operand can be provided in a general purpose register so sink it. Patterns have been added for lshr and ashr where we use a negated shift value for with a 'shift left' instruction.


https://reviews.llvm.org/D70841

Files:
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/lib/Target/ARM/ARMInstrMVE.td
  llvm/test/CodeGen/Thumb2/mve-shifts-scalar.ll
  llvm/test/CodeGen/Thumb2/mve-shifts.ll

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