[PATCH] D71373: [ConstantFolding] Disable constant folding for bitcasts to x86_fp80

Eli Friedman via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Wed Dec 11 17:07:14 PST 2019

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efriedma added a comment.

To match x87 semantics, arithmetic on a pseudonan should trigger an exception and produce a quiet NaN.  This is similar to an SNaN.  (Not sure if we currently handle SNaNs correctly, though.)


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