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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 [thread overview]
Message-ID: <bug-114270-4-zySrp5dFB8@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-114270-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114270
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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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 described
> here.
>
> 1) Significand precision of the floating point type needs to be >= precision
> 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.
prev parent reply other threads:[~2024-03-08 9:10 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-07 15:31 [Bug middle-end/114270] New: " antoshkka at gmail dot com
2024-03-07 15:50 ` [Bug middle-end/114270] " pinskia at gcc dot gnu.org
2024-03-08 8:28 ` rguenth at gcc dot gnu.org
2024-03-08 9:10 ` jakub at gcc dot gnu.org [this message]
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