rs6000.c (rs6000_savres_strategy): Allow out-of-line save/restore for large frames.

rs6000.c (rs6000_savres_strategy): Allow out-of-line save/restore for large frames.

	* config/rs6000/rs6000.c (rs6000_savres_strategy): Allow
	out-of-line save/restore for large frames.  Don't disable
	out-of-line saves on ABI_AIX when using static chain reg.
	(rs6000_emit_prologue): Adjust cr_save_regno on ABI_AIX to not
	clobber static chain reg, and tweak for out-of-line gpr saves
	that use r1.

From-SVN: r186799