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[Bug rtl-optimization/13931] [3.3/3.4/3.5 Regression] combiner much slower on big basic blocks
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Jun 2004 20:53:59 -0000
- Subject: [Bug rtl-optimization/13931] [3.3/3.4/3.5 Regression] combiner much slower on big basic blocks
- References: <20040130124106.13931.bonzini@gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-06-07 20:53 -------
If someone could find the patch which make this slower I could do something about it.
There has only been one patch to combine after 3.3 which might have caused this:
2003-10-06 Eric Botcazou <ebotcazou@libertysurf.fr>
PR optimization/11637
* combine.c (adjust_for_new_dest): New function to adjust the
notes and LOG_LINKS when the dest of an insn has changed.
(try_combine): Use it when deleting the first insn of a two-insn
parallel or splitting a two-load parallel.
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What |Removed |Added
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CC| |ebotcazou at gcc dot gnu dot
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13931