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Re: Can 3.4 patch for PR2001 be backported to 3.3?
- From: Steven Bosscher <s dot bosscher at student dot tudelft dot nl>
- To: Brad Lucier <lucier at math dot purdue dot edu>
- Cc: rth at redhat dot com, gcc-patches at gcc dot gnu dot org
- Date: 13 Mar 2003 01:42:06 +0100
- Subject: Re: Can 3.4 patch for PR2001 be backported to 3.3?
- References: <200303122148.h2CLmL206114@banach.math.purdue.edu>
Op wo 12-03-2003, om 22:48 schreef Brad Lucier:
> Richard:
>
> This patch
>
> http://gcc.gnu.org/ml/gcc-cvs/2003-02/msg00742.html
>
> basically eliminated for 3.4 the compile-time and code generation problems of
> optimization/2001
>
> http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=2001
>
> which is a regression from 2.95. Would it be possible, or reasonable, to
> backport this to the 3.3 branch? Right now, the 3.3 branch takes > 75 times
> as long to compile this example as the 3.4 compiler does.
I looked at this when I was pinging you about this patch. It looks like
it would be very difficult to backport the fixes from the mainline. A
better solution may be to disable the crossjump optimizations
alltogether for 3.3, since they seem to cause a lot of trouble, and they
were not available in 3.2 (right?).
Greetz
Steven