------- Comment #66 from bernds at gcc dot gnu dot org 2010-08-05 19:56 -------
(In reply to comment #57)
> Failure occurs for N = 0. N = 1 compiles successfully. Attached files.
Argh. I seem to have swapped the logic of the dbg_cnt test. Still, this
result appears useful.
I think initial RTL generation is fine, so it looks like my change has exposed
a latent bug. What seems to happen is that some pass between expand and
combine lengthens the lifetime of register %r25, which holds an incoming
argument, so that it now crosses another call, which clobbers it.
This seems to happen in fwprop1, Cc Paolo. I can't find any code in that pass
which tries to handle the situation.
--
bernds at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |bonzini at gnu dot org
AssignedTo|bernds at gcc dot gnu dot |bonzini at gnu dot org
|org |
Status|ASSIGNED |UNCONFIRMED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44970
