[all-commits] [llvm/llvm-project] 505d35: [X86] getFauxShuffleMask - relax one use limit for...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 505d35aad3aa3989727fa7b49b7e8ced38071770
      https://github.com/llvm/llvm-project/commit/505d35aad3aa3989727fa7b49b7e8ced38071770
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2025-02-20 (Thu, 20 Feb 2025)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/zero_extend_vector_inreg_of_broadcast.ll

  Log Message:
  -----------
  [X86] getFauxShuffleMask - relax one use limit for insert_subvector concat splat pattern (#127981)

If we're splatting a subvector using a insert_subvector(insert_subvector(undef,sub,0),sub,c) pattern then permit multiuse of the sub as long as the insert_subvector nodes are the only users.



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