* config/arc/arc-protos.h (arc_return_slot_offset): Declare.
        * config/arc/arc.c (arc_return_slot_offset): New function.
        * gcc/config/arc/arc.h [DEFAULT_LIBC == LIBC_UCLIBC]
        (DWARF2_UNWIND_INFO): Set to 1.
        (EH_RETURN_DATA_REGNO): Define.
        * config/arc/arc.md (eh_return): New pattern.
Merge branch 'arc_4_8-gcc-4_8-dev' of github.com:foss-for-synopsys-dwc-arc-processors/gcc into arc_4_8-gcc-4_8-dev

Conflicts:
	gcc/ChangeLog.ARC