------- Comment #7 from sje at cup dot hp dot com 2007-01-22 22:45 ------- So I can see things going wrong in expand_call but I still don't know why. With the FORTRAN example (comment #3) expand_call sets num_actuals to 2 and n_named_args to 1. If I write the calling code in C, num_actuals is 2 and n_named_args is 3. Because (in FORTRAN) num_actuals > n_named_args, I pass the floating point value in a general register (like varags) instead of in a floating point register like when I have a regular named argument.
n_named_args seems to be set based on list_length(type_arg_types) and for some reason this is 3 for C and 1 for Fortran. I think the fortran type_arg_types list is wrong but I don't know why it is wrong. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30432
