[all-commits] [llvm/llvm-project] 79941c: [X86] lea-2.ll - add test showing failure to fold ...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 79941c3a0df9e1c1ef95db35cfbe28a774c89278
      https://github.com/llvm/llvm-project/commit/79941c3a0df9e1c1ef95db35cfbe28a774c89278
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2023-09-11 (Mon, 11 Sep 2023)

  Changed paths:
    M llvm/test/CodeGen/X86/lea-2.ll

  Log Message:
  -----------
  [X86] lea-2.ll - add test showing failure to fold shl(zext(or(x,c1)),c2) 'addlike' into LEA instruction


  Commit: a8cef6b58e2d41f04ed4fa63c3f628eac1a28925
      https://github.com/llvm/llvm-project/commit/a8cef6b58e2d41f04ed4fa63c3f628eac1a28925
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2023-09-11 (Mon, 11 Sep 2023)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/lea-2.ll
    M llvm/test/CodeGen/X86/select_const.ll

  Log Message:
  -----------
  [X86] promoteExtBeforeAdd - add support for or/xor 'addlike' patterns

Fold zext(addlike(x, C)) --> add(zext(x), C_zext) if its likely to help us create LEA instructions

Addresses some regressions exposed by D155472


Compare: https://github.com/llvm/llvm-project/compare/56396b25f179...a8cef6b58e2d