Benjamin Kramer 8a8bb45a76 [InstSimplify] Allow folding of fdiv X, X with just NaNs ignored ...

Any combination of +-inf/+-inf is NaN so it's already ignored with
nnan and we can skip checking for ninf. Also rephrase logic in comments
a bit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239821 91177308-0d34-0410-b5e6-96231b3b80d8

2015-06-16 14:57:29 +00:00

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