[all-commits] [llvm/llvm-project] 1832d6: InstCombine/Demanded: simplify srem case (NFC) (#1...

[Ramkumar Ramachandra via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1832d609f7e7d5511bb0401a30ed1cf4f49dd00b
      https://github.com/llvm/llvm-project/commit/1832d609f7e7d5511bb0401a30ed1cf4f49dd00b
  Author: Ramkumar Ramachandra <ramkumar.ramachandra at codasip.com>
  Date:   2024-09-27 (Fri, 27 Sep 2024)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp

  Log Message:
  -----------
  InstCombine/Demanded: simplify srem case (NFC) (#110260)

The srem case of SimplifyDemandedUseBits partially duplicates
KnownBits::srem. It is guarded by a statement that takes the absolute
value of the RHS and checks whether it is a power of 2, but the abs()
call here useless, since an srem with a negative RHS is flipped into one
with a positive RHS, adjusting LHS appropriately. Stripping the abs call
allows us to call KnownBits::srem instead of partially duplicating it.



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