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Re: Remove log links usage in sh_reorg
- From: Joern Rennecke <amylaar at fairadsl dot co dot uk>
- To: jh at suse dot cz (Jan Hubicka)
- Cc: gcc-patches at gcc dot gnu dot org, rth at redhat dot com
- Date: Sat, 24 Jan 2004 01:46:12 +0000 (GMT)
- Subject: Re: Remove log links usage in sh_reorg
> Hi,
> this patch removes the use of log links in sh.c. It has the fallback
> sollution searching for the instruction by hand that seems to do the
> work too. It probably should be reorganized to use df.c as it also has
> some code to get past labels so it really wants global info.
You are changing an algorithm that is mostly linear into one that is
plain quadratic.
Have you done compilation speed regression tests with software that has
large basic blocks?