From: Richard Guenther <rguenther@suse.de>
To: Michael Matz <matz@suse.de>
Cc: Richard Guenther <richard.guenther@gmail.com>,
Mike Stump <mikestump@comcast.net>,
Jason Merrill <jason@redhat.com>,
gcc-patches List <gcc-patches@gcc.gnu.org>
Subject: Re: RFA (fold): PATCH for c++/49290 (folding *(T*)(ar+10))
Date: Mon, 20 Jun 2011 10:24:00 -0000 [thread overview]
Message-ID: <alpine.LNX.2.00.1106201118540.810@zhemvz.fhfr.qr> (raw)
In-Reply-To: <Pine.LNX.4.64.1106171555260.17115@wotan.suse.de>
On Fri, 17 Jun 2011, Michael Matz wrote:
> Hi,
>
> On Thu, 16 Jun 2011, Richard Guenther wrote:
>
> > > If people want to not create useless conversions in the first place,
> > > though, I suspect there are lots of places that create useless
> > > conversions in the compiler.
> >
> > Yeah, the above looks it comes from the frontends - gimplification
> > should strip this conversion, if it doesn't that is a bug ;)
>
> Well, Mike said this view_convert_expr actually is on the LHS of an
> assignment. I wouldn't be surprised if nobody strips "useless"
> conversions of LHSes, exactly because such things on a LHS are no
> conversions.
For vectors we can move them to the rhs instead.
Richard.
next prev parent reply other threads:[~2011-06-20 9:22 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-07 5:39 Jason Merrill
2011-06-07 10:20 ` Richard Guenther
2011-06-07 10:27 ` Jakub Jelinek
2011-06-07 12:03 ` Richard Guenther
2011-06-07 12:22 ` Richard Guenther
2011-06-07 13:46 ` Michael Matz
2011-06-07 13:49 ` Richard Guenther
2011-06-07 13:55 ` Jason Merrill
2011-06-07 14:05 ` Richard Guenther
2011-06-07 14:24 ` Jason Merrill
2011-06-09 19:47 ` Jason Merrill
2011-06-10 8:53 ` Richard Guenther
2011-06-10 14:03 ` Jason Merrill
2011-06-10 14:20 ` Richard Guenther
2011-06-10 14:32 ` Jason Merrill
2011-06-10 14:34 ` Richard Guenther
2011-06-10 14:45 ` Jason Merrill
2011-06-11 18:24 ` Mike Stump
2011-06-12 11:03 ` Richard Guenther
2011-06-13 7:29 ` Mike Stump
2011-06-13 12:46 ` Richard Guenther
2011-06-14 20:31 ` Mike Stump
2011-06-15 9:54 ` Richard Guenther
2011-06-15 18:57 ` Mike Stump
2011-06-16 7:39 ` Richard Guenther
2011-06-17 14:17 ` Michael Matz
2011-06-20 10:24 ` Richard Guenther [this message]
2011-06-12 7:58 ` Is VIEW_CONVERT_EXPR an lvalue? (was Re: RFA (fold): PATCH for c++/49290 (folding *(T*)(ar+10))) Jason Merrill
2011-06-12 13:18 ` Richard Guenther
2011-06-12 13:22 ` Richard Guenther
2011-06-13 6:12 ` Mike Stump
2011-06-12 22:42 ` Jason Merrill
2011-06-13 12:44 ` Richard Guenther
2011-06-13 17:59 ` RFA (fold): PATCH for c++/49290 (folding *(T*)(ar+10)) Jason Merrill
2011-06-14 9:10 ` Richard Guenther
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