[PATCH] D98963: [LoopVectorize] Change the identity element for FAdd where nsz is false

[Kerry McLaughlin via Phabricator via llvm-commits]

kmclaughlin created this revision.
kmclaughlin added reviewers: dmgreen, spatel, sdesmalen, david-arm.
Herald added a subscriber: hiraditya.
kmclaughlin requested review of this revision.
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Herald added a subscriber: llvm-commits.

Passes the FMF associated with a reduction to getRecurrenceIdentity to check the no-signed-zeros
flag for FAdds. If nsz is false, we should be returning a neutral value of -0.0.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D98963

Files:
  llvm/include/llvm/Analysis/IVDescriptors.h
  llvm/lib/Analysis/IVDescriptors.cpp
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Transforms/LoopVectorize/X86/reduction-fastmath.ll

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