[all-commits] [llvm/llvm-project] c7ba5a: [X86][SSE] Add initial support for extracting non-...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c7ba5a9affbcabb0d05301e5417c203274667572
      https://github.com/llvm/llvm-project/commit/c7ba5a9affbcabb0d05301e5417c203274667572
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-03-19 (Sat, 19 Mar 2022)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/avx512-insert-extract.ll
    M llvm/test/CodeGen/X86/movmsk-cmp.ll

  Log Message:
  -----------
  [X86][SSE] Add initial support for extracting non-constant bool vector elements

We can use MOVMSK+TEST/BT to extract individual bool elements even if the index isn't constant

This relies on combineBitcastvxi1 so some AVX512 cases still aren't optimized as they avoid MOVMSK usage.