* config/m68k/m68k.h (EH_RETURN_DATA_REGNO): Define.
	(EH_RETURN_STACKADJ_RTX): Define.
	(EH_RETURN_HANDLER_RTX): Define.
	(ASM_PREFERRED_EH_DATA_FORMAT): Define.
	* config/m68k/m68k.c (m68k_save_reg): New function.  Handle eh
	registers and don't save fixed registers.
	(m68k_output_function_prologue): Use it.
	(use_return_insn): Likewise.
	(m68k_output_function_epilogue): Likewise.

From-SVN: r59780