[all-commits] [llvm/llvm-project] 77adbe: [SLP] fix fast-math requirements for fmin/fmax red...

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  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 77adbe6a8c716bead04393560ec5aa88877ac1d2
      https://github.com/llvm/llvm-project/commit/77adbe6a8c716bead04393560ec5aa88877ac1d2
  Author: Sanjay Patel <spatel at rotateright.com>
  Date:   2021-01-24 (Sun, 24 Jan 2021)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/fmaxnum.ll
    M llvm/test/Transforms/SLPVectorizer/X86/fminnum.ll

  Log Message:
  -----------
  [SLP] fix fast-math requirements for fmin/fmax reductions

a6f0221276 enabled intersection of FMF on reduction instructions,
so it is safe to ease the check here.

There is still some room to improve here - it looks like we
have nearly duplicate flags propagation logic inside of the
LoopUtils helper but it is limited targets that do not form
reduction intrinsics (they form the shuffle expansion).