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From: dewar@gnat.com (Robert Dewar)
To: nobody@gcc.gnu.org
Cc: gcc-prs@gcc.gnu.org,
Subject: Re: optimization/7799: [3.2/3.3 regression] Loop bug with optimization flag -Os in gcc
Date: Fri, 20 Dec 2002 16:36:00 -0000	[thread overview]
Message-ID: <20021221003601.7693.qmail@sources.redhat.com> (raw)

The following reply was made to PR optimization/7799; it has been noted by GNATS.

From: dewar@gnat.com (Robert Dewar)
To: amylaar@onetel.net.uk, segher@koffie.nl
Cc: ehrhardt@mathematik.uni-ulm.de, gcc-bugs@gcc.gnu.org,
	gcc-gnats@gcc.gnu.org, gcc@gcc.gnu.org, nejataydin@superonline.com
Subject: Re: optimization/7799: [3.2/3.3 regression] Loop bug with optimization flag -Os in gcc
Date: Fri, 20 Dec 2002 19:25:45 -0500 (EST)

 > It can't wrap around there, but if pointers are signed, it might straddle 0
 > nonetheless.  This requires, of course, for an aligned start address
 > that the address 0 is not the same as NULL, which AFAICR is something gcc
 > doesn't currently support.
 
 Note that addresses *are* considered signed on the INMOS Transputer as a
 proof of existence :-)


             reply	other threads:[~2002-12-21  0:36 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2002-12-20 16:36 Robert Dewar [this message]
  -- strict thread matches above, loose matches on Subject: below --
2002-12-20  1:26 Christian Ehrhardt
2002-12-19 22:16 Joern Rennecke
2002-12-19 19:26 Segher Boessenkool
2002-12-13 10:06 Eric Botcazou
2002-12-13  6:56 Christian Ehrhardt
2002-12-13  5:56 Eric Botcazou
2002-12-13  5:46 Christian Ehrhardt
2002-12-06 12:52 bangerth

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