* config/rs6000/rs6000.c (rs6000_output_function_prologue): Don't
	try to insert an rtl prologue here.
	(rs6000_output_function_epilogue): Similarly.
	* config/rs6000/rs6000.md (prologue): Emit a barrier to
	satisfy !TARGET_SCHED_PROLOG.
	(epilogue, sibcall_epilogue): Likewise.

From-SVN: r176081