http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44995
--- Comment #4 from Frank Ch. Eigler <fche at redhat dot com> 2011-08-19 11:24:19 UTC --- We have worked around this powerpc oddity in systemtap's recent sdt.h versions by using both %0 and %I0 together to get a special markup for literals vs. register names.
