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From: "xry111 at mengyan1223 dot wang" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/104389] [12 Regression] HUGE_VAL * 0.0 is no
 longer a NaN
Date: Mon, 07 Feb 2022 07:15:43 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104389

Xi Ruoyao <xry111 at mengyan1223 dot wang> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |xry111 at mengyan1223 dot =
wang

--- Comment #9 from Xi Ruoyao <xry111 at mengyan1223 dot wang> ---
I think I need to paste my reply in gcc-patches here as a notice:

> Sorry for the trouble, but some warning here: even with this patch
> applied, Python would still need to replace inf * 0.0 with nan("") or
> something.  Now with folding for inf * 0.0 disabled, the multiplication
> will be evaluated at runtime and raise FE_INVALID, which is likely
> unwanted by Python.  However, raising FE_INVALID is the correct behavior
> no matter if we like or dislike it...=