[all-commits] [llvm/llvm-project] 2a1502: InstCombine: Introduce nsz flag on minimum/maximum...

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/instcombine-simplify-demanded-fpclass-maximum-introduce-nsz-flag
  Home:   https://github.com/llvm/llvm-project
  Commit: 2a15022c9da4a677adb943681cb6aff6df289ab3
      https://github.com/llvm/llvm-project/commit/2a15022c9da4a677adb943681cb6aff6df289ab3
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-01-15 (Thu, 15 Jan 2026)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp
    M llvm/test/Transforms/InstCombine/simplify-demanded-fpclass-maximum.ll
    M llvm/test/Transforms/InstCombine/simplify-demanded-fpclass-maximumnum.ll
    M llvm/test/Transforms/InstCombine/simplify-demanded-fpclass-minimum.ll
    M llvm/test/Transforms/InstCombine/simplify-demanded-fpclass-minimumnum.ll

  Log Message:
  -----------
  InstCombine: Introduce nsz flag on minimum/maximum in SimplifyDemandedFPClass

Alive isn't particularly happy with this in the case where
one of the inputs could be zero, but I think
it's wrong: https://alive2.llvm.org/ce/z/dF7V6k

nsz shouldn't permit introducing a -0 result where
there wasn't one in the input here.



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