[all-commits] [llvm/llvm-project] 3bf229: [InstCombine] Drop `samesign` flag in `foldAndOrOf...

[Yingwei Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3bf2295ee0ebd1eafe66ca15dff44bdb31e6198a
      https://github.com/llvm/llvm-project/commit/3bf2295ee0ebd1eafe66ca15dff44bdb31e6198a
  Author: Yingwei Zheng <dtcxzyw2333 at gmail.com>
  Date:   2024-10-16 (Wed, 16 Oct 2024)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
    M llvm/test/Transforms/InstCombine/and-or-icmp-min-max.ll
    M llvm/test/Transforms/InstCombine/and-or-icmp-nullptr.ll

  Log Message:
  -----------
  [InstCombine] Drop `samesign` flag in `foldAndOrOfICmpsWithConstEq` (#112489)

In
https://github.com/llvm/llvm-project/commit/5dbfca30c1a672cd0c5089df2b4fdd171436643a
we assume that RHS is poison implies LHS is also poison. It doesn't hold
after introducing samesign flag.

This patch drops the `samesign` flag on RHS if the original expression
is a logical and/or.

Closes #112467.



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