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From: rth@gcc.gnu.org To: nobody@gcc.gnu.org Cc: gcc-prs@gcc.gnu.org, Subject: Re: optimization/4919: gcse inhibits loop optimization Date: Wed, 21 Nov 2001 03:43:00 -0000 [thread overview] Message-ID: <20011127070623.25981.qmail@sourceware.cygnus.com> (raw) The following reply was made to PR optimization/4919; it has been noted by GNATS. From: rth@gcc.gnu.org To: gcc-bugs@gcc.gnu.org, gcc-gnats@gcc.gnu.org, gcc-prs@gcc.gnu.org, nobody@gcc.gnu.org, ottoni@ic.unicamp.br Cc: Subject: Re: optimization/4919: gcse inhibits loop optimization Date: 27 Nov 2001 07:03:49 -0000 Synopsis: gcse inhibits loop optimization State-Changed-From-To: open->suspended State-Changed-By: rth State-Changed-When: Mon Nov 26 23:03:48 2001 State-Changed-Why: GCSE did exactly what it was supposed to do -- the expression I+1, which appears twice in the body of the loop, is partially redundant with the increment of I at the end of the loop. This isn't really a problem with GCSE, but with the extreme lameness of our loop optimizer. Hopefully we'll have time to rewrite it from scratch for gcc 3.2; Jan Hubicka has already volunteered to try. http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&pr=4919&database=gcc
next reply other threads:[~2001-11-27 7:06 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2001-11-21 3:43 rth [this message] -- strict thread matches above, loose matches on Subject: below -- 2001-11-21 3:36 rth 2001-11-16 23:39 ottoni
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