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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/94086] Missed optimization when converting a bitfield to an integer on x86-64
Date: Mon, 09 Mar 2020 09:40:23 +0000 [thread overview]
Message-ID: <bug-94086-4-Fz7CONbPa8@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-94086-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94086
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Last reconfirmed| |2020-03-09
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. This is another task for a combined bswap/store-merging where the
bswap tracking would need to be extended to cover bits.
Also part of the reason for the missed optimization is that on GIMPLE we
think 'half' is memory but in reality it is in a register.
next prev parent reply other threads:[~2020-03-09 9:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-07 19:33 [Bug c/94086] New: " larrowe.semaj11 at gmail dot com
2020-03-08 4:30 ` [Bug tree-optimization/94086] " pinskia at gcc dot gnu.org
2020-03-08 19:05 ` alex_lop at walla dot com
2020-03-09 9:40 ` rguenth at gcc dot gnu.org [this message]
2020-05-11 5:21 ` egallager at gcc dot gnu.org
2021-08-22 0:29 ` pinskia at gcc dot gnu.org
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