[all-commits] [llvm/llvm-project] 2d3792: [X86] Fold ANDNP(x, -1) -> NOT(x) -> XOR(x, -1)

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2d3792bef08d32afc67fd523160ace6c40b54e80
      https://github.com/llvm/llvm-project/commit/2d3792bef08d32afc67fd523160ace6c40b54e80
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2023-06-27 (Tue, 27 Jun 2023)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/fpclamptosat_vec.ll
    M llvm/test/CodeGen/X86/masked_store_trunc_usat.ll
    M llvm/test/CodeGen/X86/psubus.ll
    M llvm/test/CodeGen/X86/udiv_fix_sat.ll
    M llvm/test/CodeGen/X86/vector-trunc-usat.ll

  Log Message:
  -----------
  [X86] Fold ANDNP(x, -1) -> NOT(x) -> XOR(x, -1)

Prefer XOR to ANDNP as its commutative


  Commit: 76a27f3a32f619d386fb8efa1563ba21b76e9170
      https://github.com/llvm/llvm-project/commit/76a27f3a32f619d386fb8efa1563ba21b76e9170
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2023-06-27 (Tue, 27 Jun 2023)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp

  Log Message:
  -----------
  [X86] Add getBitSelect helper function to create OR(AND(LHS,MASK),AND(RHS,~MASK)) bit select patterns. NFC.


Compare: https://github.com/llvm/llvm-project/compare/4bc76e808517...76a27f3a32f6