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Re: Out-of-sight compile times for calculate_loop_depth
- To: gcc at gcc dot gnu dot org
- Subject: Re: Out-of-sight compile times for calculate_loop_depth
- From: Gerald Pfeifer <pfeifer at dbai dot tuwien dot ac dot at>
- Date: Tue, 8 Feb 2000 19:11:11 +0100 (MET)
- cc: Joe Buck <jbuck at synopsys dot COM>, Jeffrey A Law <law at cygnus dot com>, Michael Hayes <m dot hayes at elec dot canterbury dot ac dot nz>, Brad Lucier <lucier at math dot purdue dot edu>
On Tue, 8 Feb 2000, Joe Buck wrote:
>> The advantage of the existing dominator algorithm is that it's very
>> simple to understand and performs OK for reasonable code.
> Unfortunately, many of us often generate C or C++ code mechanically
> and the result may not be what you consider "reasonable".
Actually, we experience exactly the same behavior as Brad for hand-written
C++ code to the extent that we have had to completely abandon using
current CVS versions of GCC for testing a couple of months ago. :-(
If there's interest, I can try to come up with an analysis similiar to
Brad's...
Gerald
--
Gerald "Jerry" pfeifer@dbai.tuwien.ac.at http://www.dbai.tuwien.ac.at/~pfeifer/