[all-commits] [llvm/llvm-project] 29b200: Revert "[DAG] SimplifyDemandedBits - if we're only...

[Thurston Dang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 29b200906155da393b83232dd31d746ba2ad66a5
      https://github.com/llvm/llvm-project/commit/29b200906155da393b83232dd31d746ba2ad66a5
  Author: Thurston Dang <thurston at google.com>
  Date:   2023-08-18 (Fri, 18 Aug 2023)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/TargetLowering.cpp
    M llvm/test/CodeGen/X86/smax.ll
    M llvm/test/CodeGen/X86/smin.ll

  Log Message:
  -----------
  Revert "[DAG] SimplifyDemandedBits - if we're only demanding the signbit, a SMIN/SMAX node can be simplified to a OR/AND node respectively."

This reverts commit 54d663d5896008c09c938f80357e2a056454bc65, which breaks the test CodeGen/SystemZ/ctpop-01.ll for stage2-ubsan check (see https://lab.llvm.org/buildbot/#/builders/85/builds/18410)

I manually confirmed that the test had been passing immediately prior to that commit
(BUILDBOT_REVISION=4772c66cfb00d60f8f687930e9dd3aa1b6872228 llvm-zorg/zorg/buildbot/builders/sanitizers/buildbot_bootstrap_ubsan.sh)