[PATCH] D42948: [SelectionDAG] Support some SimplifySetCC cases for comparing against vector splats of constants.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: RKSimon, spatel.
Herald added subscribers: kristof.beyls, javed.absar, sdardis, aemerson.

This supports things like

(setcc uge X, 0) -> true
(setcc ugt X, 0) -> (setcc ne X, 0)

The AArch64 test changes are to avoid using things that we can simplify now. I'll probably commit these separately.


Repository:
  rL LLVM

https://reviews.llvm.org/D42948

Files:
  include/llvm/CodeGen/SelectionDAG.h
  lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  lib/CodeGen/SelectionDAG/TargetLowering.cpp
  test/CodeGen/AArch64/arm64-neon-compare-instructions.ll
  test/CodeGen/AArch64/neon-compare-instructions.ll
  test/CodeGen/Mips/msa/compare.ll
  test/CodeGen/X86/avx512-insert-extract.ll
  test/CodeGen/X86/avx512-mask-op.ll
  test/CodeGen/X86/avx512-schedule.ll

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