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From: "Richard Guenther" <richard.guenther@gmail.com>
To: "Paolo Bonzini" <bonzini@gnu.org>
Cc: "GCC Patches" <gcc-patches@gcc.gnu.org>
Subject: Re: PING: PR/17236, improve long long multiply on x86 (middle-end)
Date: Thu, 21 Feb 2008 16:00:00 -0000	[thread overview]
Message-ID: <84fc9c000802210745n7b9b1c86w56166383d9eefede@mail.gmail.com> (raw)
In-Reply-To: <47BBDFFE.5030001@gnu.org>

2008/2/20 Paolo Bonzini <bonzini@gnu.org>:
> http://gcc.gnu.org/ml/gcc-patches/2007-12/msg00995.html

The combine trick is obvious, but I'd like to know whether the two
other tweaks have an impact on other targets.  Does the combine
trick alone help?  Can you try crafting a testcase somehow (I realize
this might be difficult, but maybe counting the number of moves
works out in a target dependent test).

Thanks,
Richard.

  reply	other threads:[~2008-02-21 15:46 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-20  8:55 Paolo Bonzini
2008-02-21 16:00 ` Richard Guenther [this message]
2008-02-21 16:54   ` Paolo Bonzini
2008-03-05 15:40 ` Ian Lance Taylor
2008-03-06  8:29   ` Paolo Bonzini
2008-03-06 17:19     ` Ian Lance Taylor
2008-03-06 17:49       ` Paolo Bonzini
2008-03-07  0:53         ` Ian Lance Taylor
2008-03-07  8:31           ` Paolo Bonzini

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