[Bug middle-end/16266] [4.0 regression] gcc.dg/c99-intconst-1.c compilation is very slow

[joern dot rennecke at superh-support dot com]

------- Additional Comments From joern dot rennecke at superh-support dot com  2004-10-08 23:11 -------
Subject: Re:  [4.0 regression] gcc.dg/c99-intconst-1.c compilation is very slow

 --- pinskia at gcc dot gnu dot org
<gcc-bugzilla@gcc.gnu.org> wrote: 
> 
> ------- Additional Comments From pinskia at gcc dot
> gnu dot org  2004-10-08 11:57 -------
> Since you did not configure with --disable-checking
> the time is expected to raise.  See the note here:
> Extra diagnostic checks enabled; compiler may run
> slowly.
> Configure with --disable-checking to disable checks.
> 
> Can you try with --disable-checking as requested
> before.

The pre-tree-ssa-merge compiler was also compiled with
checking enabled,
and the testcase took only eight seconds on the slower
processor.
That's a factor of sixteen, times the speed
differential of the processors.
Are you suggesting that
a) All or most of the speed regression comes from a
slowdown in
   the --enable-checking code (or more of it)
and
b) We should keep regression tests viable by using --disable-checking?


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16266