From: "Fang, Changpeng" <Changpeng.Fang@amd.com>
To: Jan Hubicka <hubicka@ucw.cz>
Cc: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>,
"rguenther@suse.de" <rguenther@suse.de>,
"sebpop@gmail.com" <sebpop@gmail.com>,
Zdenek Dvorak <rakdver@kam.mff.cuni.cz>
Subject: RE: [PATCH, PR44503] Fixes "control flow in the middle of basic block" with -fprefetch-loop-arrays
Date: Wed, 16 Jun 2010 16:58:00 -0000 [thread overview]
Message-ID: <D4C76825A6780047854A11E93CDE84D02F7747@SAUSEXMBP01.amd.com> (raw)
In-Reply-To: <20100615175336.GF10161@atrey.karlin.mff.cuni.cz>
-fprefetch-loop-arrays.
>
> The problem is that a non-local label (for setjmp) exists in the function. When we insert a _builtin_prefetch
> call, this prefetch is considered potentially changing the control flow. We think this is, in general, a loop
> construction problem. When the current function has non local labels, there are no natural loops in the
> function.
>I would rather say it is CFG problem - for known builtins, like
>__bultiln_prefetch we certainly don't need to produce nonlocal goto edges.
>In fact this might be perhaps bundled in my "leaf" attribute patch I proposed
>some time ago.
Hi, Honza:
Would you please give a link to your leaf attribute patch ?
Thanks,
Changpeng
next prev parent reply other threads:[~2010-06-16 16:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-15 18:10 Fang, Changpeng
2010-06-15 18:40 ` Jan Hubicka
2010-06-15 19:03 ` Fang, Changpeng
2010-06-15 20:16 ` Zdenek Dvorak
2010-06-16 16:58 ` Fang, Changpeng [this message]
2010-06-16 17:04 ` Jan Hubicka
2010-06-15 20:07 ` Zdenek Dvorak
2010-06-16 5:59 ` Fang, Changpeng
2010-06-16 7:15 ` Zdenek Dvorak
2010-06-17 7:39 ` Fang, Changpeng
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