[all-commits] [llvm/llvm-project] 4d84d9: [X86][SSE] Relax 128-bit restriction on extract_su...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 4d84d94969d6a72f8cf189c5fba1e2366ed88ee3
      https://github.com/llvm/llvm-project/commit/4d84d94969d6a72f8cf189c5fba1e2366ed88ee3
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2020-07-27 (Mon, 27 Jul 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vector-reduce-mul.ll

  Log Message:
  -----------
  [X86][SSE] Relax 128-bit restriction on extract_subvector(ext_vector_inreg(X),0) -> ext_vector_inreg(extract_subvector(X,0)) fold

We only need to ensure that the source is larger than the subvector result type