[all-commits] [llvm/llvm-project] 24d06f: [x86] add test for pcmpeq with 0; NFC

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  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 24d06fff55510780eba1a267d844ee26a17d6888
      https://github.com/llvm/llvm-project/commit/24d06fff55510780eba1a267d844ee26a17d6888
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2021-05-12 (Wed, 12 May 2021)

  Changed paths:
    M llvm/test/CodeGen/X86/setcc-lowering.ll

  Log Message:
  -----------
  [x86] add test for pcmpeq with 0; NFC


  Commit: f58e0513dd95944b81ce7a6e7b49ba656de7d75f
      https://github.com/llvm/llvm-project/commit/f58e0513dd95944b81ce7a6e7b49ba656de7d75f
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2021-05-12 (Wed, 12 May 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/setcc-lowering.ll
    M llvm/test/CodeGen/X86/vec_umulo.ll
    M llvm/test/CodeGen/X86/vsel-cmp-load.ll

  Log Message:
  -----------
  [x86] try harder to lower to PCMPGT instead of not-of-PCMPEQ

This is motivated by the example in https://llvm.org/PR50055 ,
but it doesn't do anything for that bug currently because we
don't actually have a zero-extended setcc there.

Proof for the generic transform (inverse of what we would
try to do in combining):
https://alive2.llvm.org/ce/z/aBL-Mg

Differential Revision: https://reviews.llvm.org/D102275


Compare: https://github.com/llvm/llvm-project/compare/4c59ab34f7bd...f58e0513dd95