* rtl.h (enum reg_note): Add REG_FRAME_RELATED_EXPR.
        * rtl.c (reg_note_name): Likewise.
        * rtl.texi (REG_NOTES): Likewise.
        * dwarf2out.c (dwarf2out_frame_debug): Use it.  Recognize a store
        without an offset.

From-SVN: r22273