http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38518
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra
Status|ASSIGNED |NEW
CC| |vmakarov at gcc dot gnu.org
Assignee|rguenth at gcc dot gnu.org |unassigned at gcc dot
gnu.org
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
With 4.9.0
-O1: 5s
-O2: 7s
-O3: 41s
the profile at -O3 is mostly flat, worst offender is LRA hard-reg assignment
which may also contribute to the high DF time.
Execution times (seconds)
phase opt and generate : 41.00 (100%) usr 0.68 (94%) sys 41.75 (100%)
wall 451991 kB (99%) ggc
df reaching defs : 5.87 (14%) usr 0.03 ( 4%) sys 5.82 (14%) wall
0 kB ( 0%) ggc
dominance frontiers : 2.52 ( 6%) usr 0.00 ( 0%) sys 2.51 ( 6%) wall
0 kB ( 0%) ggc
LRA hard reg assignment : 4.94 (12%) usr 0.04 ( 6%) sys 4.96 (12%) wall
0 kB ( 0%) ggc
TOTAL : 41.05 0.72 41.84
456534 kB
It's now a RA issue, I'm out of here (though I'd even consider closing this
as fixed - I've added the testcase to daily monitoring).
