rtl.h (union rtunion_def): Have all members start with the prefix "rt_".

rtl.h (union rtunion_def): Have all members start with the prefix "rt_".

        * rtl.h (union rtunion_def): Have all members  start with the
        prefix "rt_".
        (XINT, XSTR, XEXP, XVEC, XMODE, XBITMAP, XTREE, XBBDEF, XTMPL,
        X0INT, X0UINT, X0STR, X0EXP, X0VEC, X0MODE, X0BITMAP, X0TREE,
        X0MEMATTR, X0BBDEF, X0REGATTR, XCINT, XCUINT, XCSTR, XCEXP,
        XCVEC, XCMODE, XCBITMAP, XCTREE, XCBBDEF, XC2EXP): Adjust
        members
        access.
        * gengtype.c (adjust_field_rtx_def): Likewise.
        * rtlanal.c (loc_mentioned_in_p): Likewise.

From-SVN: r85434