[all-commits] [llvm/llvm-project] 1357c0: Revert "[X86][SSE] MatchVectorAllZeroTest - handle...

[Hans via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 1357c065783e8d66c9db4be59aca389d1dc6c05f
      https://github.com/llvm/llvm-project/commit/1357c065783e8d66c9db4be59aca389d1dc6c05f
  Author: Hans Wennborg <hans at chromium.org>
  Date:   2020-06-22 (Mon, 22 Jun 2020)

  Changed paths:
    M llvm/lib/Target/X86/X86ISelLowering.cpp
    M llvm/test/CodeGen/X86/pr45378.ll
    M llvm/test/CodeGen/X86/vector-reduce-or-cmp.ll

  Log Message:
  -----------
  Revert "[X86][SSE] MatchVectorAllZeroTest - handle OR vector reductions"

This caused a Chromium test to miscompile. See discussion on the Phabricator
review.

> This patch extends MatchVectorAllZeroTest to handle OR vector reduction patterns where the result is compared against zero.
>
> Fixes PR45378
>
> Differential Revision: https://reviews.llvm.org/D81547

This reverts 057c9c7ee00b7f7696065a3fc26a3df5ce3ebe96