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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/105414] constant folding for fmin/max(snan,
 snan) is wrong
Date: Thu, 28 Apr 2022 08:18:14 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105414

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Sure, but you don't want to do that at least if flag_trapping_math.
Otherwise, the predicate would be tree_expr_signaling_nan_p and real_nan
function with "", 1 as the middle 2 arguments can create it.  But note that
nothing in match.pd does that right now, so I don't think we should do it in
this case either.=