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From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/55966] __atomic_fetch_* generate wrong code for HLE
Date: Mon, 14 Jan 2013 21:22:00 -0000	[thread overview]
Message-ID: <bug-55966-4-nNZCeDR8s6@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-55966-4@http.gcc.gnu.org/bugzilla/>


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55966

--- Comment #4 from Uros Bizjak <ubizjak at gmail dot com> 2013-01-14 21:22:35 UTC ---
The problem is, that in failed case maybe_emit_op() gets target register to
return the result to, so with after=false, it expands via
optab->mem_fetch_before.

Unfortunately, atomic_fetch_<logic> or atomic_<logic>_fetch do not exist for
x86 target, so generic expander falls back to exchange loop.


  parent reply	other threads:[~2013-01-14 21:22 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-01-14  6:11 [Bug target/55966] New: " andi-gcc at firstfloor dot org
2013-01-14 19:06 ` [Bug target/55966] " andi-gcc at firstfloor dot org
2013-01-14 19:52 ` andi-gcc at firstfloor dot org
2013-01-14 20:15 ` andi-gcc at firstfloor dot org
2013-01-14 21:22 ` ubizjak at gmail dot com [this message]
2013-01-14 21:25 ` ubizjak at gmail dot com
2013-01-14 22:05 ` andi-gcc at firstfloor dot org
2013-01-14 22:23 ` amacleod at redhat dot com
2013-01-14 22:32 ` andi-gcc at firstfloor dot org
2013-01-14 22:34 ` andi-gcc at firstfloor dot org
2024-04-09  2:58 ` pinskia at gcc dot gnu.org

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