[all-commits] [llvm/llvm-project] ff252e: [X86] combineConcatVectorOps - don't concat(vselec...

[Simon Pilgrim via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ff252e6b13ec99b654ff15620e53aebcecda0e6c
      https://github.com/llvm/llvm-project/commit/ff252e6b13ec99b654ff15620e53aebcecda0e6c
  Author: Simon Pilgrim <llvm-dev at redking.me.uk>
  Date:   2022-11-16 (Wed, 16 Nov 2022)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/vselect-avx.ll

  Log Message:
  -----------
  [X86] combineConcatVectorOps - don't concat(vselect,vselect) if the concatenated selection mask isn't legal

One of the crash regression tests now exposes an existing issue with SelectionDAG::simplifySelect not folding vselect with constant masks

Fixes #59003