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Re: optimization/2001: [3.2/3.3 regression] Inordinately longcompile times in reload CSE regs
- From: Andreas Jaeger <aj at suse dot de>
- To: Steven Bosscher <s dot bosscher at student dot tudelft dot nl>
- Cc: gcc-bugs at gcc dot gnu dot org, lucier at math dot purdue dot edu, rth at redhat dot com
- Date: Sun, 16 Mar 2003 11:19:52 +0100
- Subject: Re: optimization/2001: [3.2/3.3 regression] Inordinately longcompile times in reload CSE regs
- References: <3E744BDD.1090409@student.tudelft.nl>
Steven Bosscher <s dot bosscher at student dot tudelft dot nl> writes:
> http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=2001
>
> Richard's patch really improves things a lot for me:
> http://gcc.gnu.org/ml/gcc-patches/2003-03/msg01478.html
>
> If somebody tries this: The patch doesn't apply cleanly, the
> first hunk of bb-reorder.c needs to be applied manually.
Can you send a clean patch against 3.3 to save others applying it
manually?
> The numbers:
>
> GCC 3.3, March 12 sources:
>
> at -O0: TOTAL : 4.66 0.24 6.14
> at -O2: TOTAL : 316.67 1.71 329.12
>
> GCC 3.3, March 16 sources + Richard's patch:
>
> at -O0: TOTAL : 3.17 0.15 3.50
> at -O2: TOTAL : 5.60 0.17 5.91
>
> The latter is the avarage of three runs because I could hardly
> believe these numbers.
>
> Brad, this is worth a try, don't you think? :-)
Really impressive,
Andreas
--
Andreas Jaeger
SuSE Labs aj at suse dot de
private aj at arthur dot inka dot de
http://www.suse.de/~aj