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[new-regalloc] Dataflow too slow...
- To: Michael Hayes <mhayes at redhat dot com>
- Subject: [new-regalloc] Dataflow too slow...
- From: Geert Bosch <bosch at gnat dot com>
- Date: Sat, 3 Feb 2001 14:49:17 -0500 (EST)
- Cc: gcc at gcc dot gnu dot org
One of the things I'm stumbling on now is that df_rd_global_compute
takes way too much time to allow me to bootstrap the Ada compiler.
For example, one unit that usually just takes 0.8 seconds to compile on
a 1.1GH Athlon, takes more then 10 minutes now. Memory usage is around
30 MB, not outrageous. One invocation of this function takes a few
minutes to return...
I killed the compiler after it was munching for 40 minutes on a (bit)
more complex file. Of course, it is too early to be concerned about a
factor of ten in performance, but even for testing this is a bit too slow...
What complexity should these dataflow calculations be?
-Geert