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From: "z.zhanghaijian at huawei dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/94665] missed minmax optimization opportunity
 for if/else structure.
Date: Mon, 20 Apr 2020 07:24:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D94665

--- Comment #4 from z.zhanghaijian at huawei dot com <z.zhanghaijian at hua=
wei dot com> ---
(In reply to Segher Boessenkool from comment #2)
> If vara is a NaN, this is not the same; it needs -ffinite-math-only.
> And in fact adding that option does the trick (on powerpc that is, I
> don't have an aarch64 Fortran handy).
>=20
> Could you check this please?

Yes, on aarch64, fmaxnm can be generated with -ffinite-math-only and
-funsafe-math-optimizations.

One question: why is it OK for rtl combine to generate the fminnm here?
Anything I missed?=