[all-commits] [llvm/llvm-project] d43a26: Revert "[X86][SSE] Fold unpack(hop(), hop()) -> per...

[Nico Weber via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d43a264a5dd3c72bf9dc663551c0993921b28136
      https://github.com/llvm/llvm-project/commit/d43a264a5dd3c72bf9dc663551c0993921b28136
  Author: Nico Weber <thakis at chromium.org>
  Date:   2021-01-10 (Sun, 10 Jan 2021)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/horizontal-shuffle-2.ll

  Log Message:
  -----------
  Revert "[X86][SSE] Fold unpack(hop(),hop()) -> permute(hop())"

This reverts commit 80dee7965dffdfb866afa9d74f3a4a97453708b2.
Makes clang sometimes hang forever. See
https://bugs.chromium.org/p/chromium/issues/detail?id=1164786#c6 for a
stand-alone repro.