[all-commits] [llvm/llvm-project] 1f69d6: [InstCombine] Preserve the sign bit of NaN in `Sim...

[Yingwei Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 1f69d6354a4b088bda5ee62c31411a75eead8b0c
      https://github.com/llvm/llvm-project/commit/1f69d6354a4b088bda5ee62c31411a75eead8b0c
  Author: Yingwei Zheng <dtcxzyw2333 at gmail.com>
  Date:   2025-04-28 (Mon, 28 Apr 2025)

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

  Log Message:
  -----------
  [InstCombine] Preserve the sign bit of NaN in `SimplifyDemandedUseFPClass` (#137287)

Alive2: https://alive2.llvm.org/ce/z/uiUzEf

Closes https://github.com/llvm/llvm-project/issues/137196.

Note: To avoid regression in
`ret_nofpclass_nopositives_copysign_nnan_flag`, the second commit takes
FMF into account.



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