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[Bug middle-end/40375] redundant register move with scheduler before RA turned off
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Feb 2010 10:55:07 -0000
- Subject: [Bug middle-end/40375] redundant register move with scheduler before RA turned off
- References: <bug-40375-17659@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #9 from steven at gcc dot gnu dot org 2010-02-10 10:55 -------
Reconfirmed with r156595 and r156650 (with and without -fschedule-insns, and
-fsched-pressure makes no difference either).
Vlad, you added some register pressure awareness to the scheduler. Do you think
there is a way to teach the scheduler to unconditionally move insns, or at
least simple moves, around if it reduces register pressure? (See comment #5 in
this PR.)
--
steven at gcc dot gnu dot org changed:
What |Removed |Added
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CC| |vmakarov at gcc dot gnu dot
| |org
Last reconfirmed|2009-06-09 08:34:25 |2010-02-10 10:55:07
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40375