[PATCH] D65059: [ARM] Better OR's for MVE compares

[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.
dmgreen added a parent revision: D65058: [ARM] Better AND's for MVE compares.

This adds a DeMorgan combine for OR's of compares to turn them into AND's, helping prevent them from going into and out of gpr registers. It also fills in the VCLE and VCLT nodes that MVE can select, allowing it to invert more compares.


https://reviews.llvm.org/D65059

Files:
  llvm/lib/Target/ARM/ARMISelLowering.cpp
  llvm/lib/Target/ARM/ARMISelLowering.h
  llvm/lib/Target/ARM/ARMInstrInfo.td
  llvm/lib/Target/ARM/ARMInstrMVE.td
  llvm/test/CodeGen/Thumb2/mve-pred-or.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpf.ll
  llvm/test/CodeGen/Thumb2/mve-vcmpfz.ll

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