PR target/20375

        * config/alpha/alpha.c (alpha_setup_incoming_varargs): Advance a copy
        of CUMULATIVE_ARGS past the last named argument.
        (alpha_va_start): Expect pretend_args_size only if strictly less than
        6 named arguments.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@98257 138bc75d-0d04-0410-961f-82ee72b054a4