[PATCH] D121243: [InstCombine] Preserve FMF in foldLogicOfFCmps.

[Craig Topper via Phabricator via llvm-commits]

craig.topper created this revision.
craig.topper added reviewers: spatel, nlopes, lebedev.ri, RKSimon, nikic.
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This patch intersects the fast math flags from the two fcmps instead
of dropping them.

I poked at this a bunch with Alive2 for nnan and ninf flags and it seemed
to check out. With the other flags it told me "Couldn't prove the
correctness of the transformation". Not sure if I should just preserve
nnan and ninf?


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D121243

Files:
  llvm/lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
  llvm/test/Transforms/InstCombine/and-fcmp.ll
  llvm/test/Transforms/InstCombine/or-fcmp.ll

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