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[Bug rtl-optimization/37471] Move invariant pulls too many cmps out of a loop
- 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: 21 Sep 2008 00:32:13 -0000
- Subject: [Bug rtl-optimization/37471] Move invariant pulls too many cmps out of a loop
- References: <bug-37471-6528@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from pinskia at gcc dot gnu dot org 2008-09-21 00:32 -------
While looking a different bug dealing with invariant motion, I noticed that
estimate_reg_pressure_cost does not take into account the mode of the new
register. This seems like a big issue. Also init_set_costs always uses SImode
which is not a good representation of the register pressure in general.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37471