optimization/4714: Haney's real matrix performance regression

[Paolo Carlini]

The following reply was made to PR optimization/4714; it has been noted by GNATS.

From: Paolo Carlini <pcarlini@unitus.it>
To: rth@gcc.gnu.org,  CGLeggett@lbl.gov,  gcc-bugs@gcc.gnu.org, 
 gcc-prs@gcc.gnu.org,  nobody@gcc.gnu.org,  pcarlini@unitus.it, 
 pete@ltoi.iap.physik.tu-darmstadt.de,  gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: optimization/4714: Haney's real matrix performance regression
Date: Wed, 03 Apr 2002 11:55:47 +0200

 rth@gcc.gnu.org wrote:
 
 >     Somehow we're not recognizing *any* givs.
 >
 Hi!
 
 What will you think of me if I blatantly confess to have /no idea/ what 
 a "giv" is? :-(
 (I would like to learn more, however)
 
 Anyway, this should be fixed somehow for 3.2, since it looks like it was 
 basically due to weak C++ alias analysis... Dunno if the "givs" issue is 
 orthogonal to this one, or whatever...
 
 Thanks, Paolo.
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=4714