http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41004
Steven Bosscher steven at gcc dot gnu.org changed:
What|Removed |Added
Status|ASSIGNED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41004
--- Comment #9 from Steven Bosscher steven at gcc dot gnu.org 2012-11-08
23:07:36 UTC ---
May be fixed by the patch that was applied for PR54364.
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41004
--- Comment #8 from Steven Bosscher steven at gcc dot gnu.org 2012-03-16
23:59:41 UTC ---
Ehm, why does tree tail-merge not run at -Os? It's a size optimization, after
all!
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41004
--- Comment #7 from Andrew Pinski pinskia at gcc dot gnu.org 2012-02-04
03:00:33 UTC ---
First off, I think cselim should also be run at -Os.
And then we have the issue of tree-ssa-tail-merge not running at -Os.
--- Comment #6 from steven at gcc dot gnu dot org 2010-01-11 09:35 ---
Re. comment #5 -- rth, any suggestions what an algorithm would look like to
minimize the number of branches, or the total size of all of the branch
instructions? And what do you mean with some clever changes to the
--- Comment #4 from carrot at google dot com 2009-08-19 21:55 ---
(In reply to comment #2)
Why does the basic block reordering pass also not handle this?
Basic block reordering is disabled with options -Os.
The basic block reordering algorithm is for performance only, it usually
--- Comment #5 from rth at gcc dot gnu dot org 2009-08-19 23:06 ---
Basic block reordering *should* be altered to work with -Os.
It's definitely required to clean up silly jump sequences that
exception handling creates.
There's no reason, in principal, that the ordering algorithm
can't
--
steven at gcc dot gnu dot org changed:
What|Removed |Added
AssignedTo|unassigned at gcc dot gnu |steven at gcc dot gnu dot
|dot org
--- Comment #3 from rguenth at gcc dot gnu dot org 2009-08-08 10:36 ---
I would suggest to closely look at SSA expansion as well. There is I think
still the regression from pre-SSA expand that it doesn't expand PHI nodes
optimally at -Os (pre-SSA expand split common PHI args into extra
