* config/rs6000/predicates.md (word_offset_memref_op): Handle
	cmodel medium addresses.
	* config/rs6000/rs6000.c (rs6000_secondary_reload): Handle misaligned
	64-bit gpr loads and stores.
	(rs6000_secondary_reload_ppc64): New function.
	* config/rs6000/rs6000-protos.h: Declare it.
	* config/rs6000/rs6000.md (reload_di_store, reload_di_load): New.

From-SVN: r171542