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From: Hans-Peter Nilsson <hp@bitrange.com>
To: nobody@gcc.gnu.org
Cc: gcc-prs@gcc.gnu.org,
Subject: Re: c/10339: strncmp generates imPure code
Date: Tue, 08 Apr 2003 01:56:00 -0000	[thread overview]
Message-ID: <20030408015601.6777.qmail@sources.redhat.com> (raw)

The following reply was made to PR optimization/10339; it has been noted by GNATS.

From: Hans-Peter Nilsson <hp@bitrange.com>
To: Falk Hueffner <falk.hueffner@student.uni-tuebingen.de>
Cc: Wolfgang Bangerth <bangerth@ices.utexas.edu>, 
    Michael Ubell <ubell@mindspring.com>,  <gcc-bugs@gcc.gnu.org>, 
     <gcc-gnats@gcc.gnu.org>
Subject: Re: c/10339: strncmp generates imPure code
Date: Mon, 7 Apr 2003 21:51:38 -0400 (EDT)

 On 7 Apr 2003, Falk Hueffner wrote:
 > This optimiziation would only be invalid if
 >
 > * it gives a different result,
 > * or the memory read straddles a page boundary and faults.
 
 Or
   * you use a tool such as valgrind to execute the code
     (a variant of the first item).
 
 (yeah, yeah, this wasn't about i*86...  Replace "valgrind"
 with "purify"  or similar.)
 
 brgds, H-P
 


             reply	other threads:[~2003-04-08  1:56 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-04-08  1:56 Hans-Peter Nilsson [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-04-07 21:46 Michael Ubell
2003-04-07 21:46 Andreas Schwab
2003-04-07 21:36 Michael Ubell
2003-04-07 21:26 Andreas Schwab
2003-04-07 20:56 Michael Ubell
2003-04-07 20:06 Andreas Schwab
2003-04-07 20:06 Michael Ubell
2003-04-07 19:56 Michael Ubell
2003-04-07 19:36 Falk Hueffner
2003-04-07 19:36 Andreas Schwab
2003-04-07 19:06 Michael Ubell
2003-04-07 19:06 Falk Hueffner
2003-04-07 18:16 Wolfgang Bangerth
2003-04-07 17:06 Michael Ubell
2003-04-07 16:48 bangerth
2003-04-07 16:16 ubell

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