2004-12-04 Andrew Pinski <pinskia@physics.uc.edu>

2004-12-04  Andrew  Pinski  <pinskia@physics.uc.edu>

        PR middle-end/17909
        * builtins.c (fold_builtin_next_arg): Export and return true
        when there is a warning or an error.
        (expand_builtin_va_start): When fold_builtin_next_arg returns true,
        return const0_rtx.
        (expand_builtin): Likewise.
        * gimplify.c (gimplify_call_expr): Error out if there is not
        enough arguments to va_start. Call fold_builtin_next_arg also
        on the second argument.
        * tree.h (fold_builtin_next_arg): Prototype.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@91727 138bc75d-0d04-0410-961f-82ee72b054a4