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Re: optimization/2001: [3.2/3.3 regression] Inordinately long compiletimes in reload CSE regs
- From: Steven Bosscher <s dot bosscher at student dot tudelft dot nl>
- To: gcc-gnats at gcc dot gnu dot org, gcc-bugs at gcc dot gnu dot org,lucier at math dot purdue dot edu, nobody at gcc dot gnu dot org, gcc-prs at gcc dot gnu dot org,rth at redhat dot com
- Date: Sun, 16 Mar 2003 11:03:09 +0100
- Subject: Re: optimization/2001: [3.2/3.3 regression] Inordinately long compiletimes in reload CSE regs
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.
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? :-)
Greetz
Steven