[all-commits] [llvm/llvm-project] cc89eb: [X86] LowerVectorAllEqual - split ALLOF(CMPEQ(X, Y)...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cc89ebe2b9230f34831176ada8876dff3fffc24b
      https://github.com/llvm/llvm-project/commit/cc89ebe2b9230f34831176ada8876dff3fffc24b
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2023-04-05 (Wed, 05 Apr 2023)

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

  Log Message:
  -----------
  [X86] LowerVectorAllEqual - split ALLOF(CMPEQ(X,Y)) -> AND(CMPEQ(X[0],Y[0]),CMPEQ(X[1],Y[1]),....) on MOVMSK codegen

Fix minor regression on pre-PTEST targets, since these are always 128-bits we're better off reducing the comparison results (assuming we're not comparing against 0/-1).