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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/114270] Integer multiplication on floating point
 constant with conversion back to integer is not optimized
Date: Fri, 08 Mar 2024 09:10:25 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114270

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #1)
> The rules for this to be done are a bit more complex than what is describ=
ed
> here.
>=20
> 1) Significand precision of the floating point type needs to be >=3D prec=
ision
> of the integer type

I'd also verify that minimum/maximum of the integer type are exactly
representable in the floating point type, such that even limitations on
exponent don't stand in a way.=