Fix LRA regressions on 64-bit SPARC.

Fix LRA regressions on 64-bit SPARC.

gcc/
	* config/sparc/sparc-protos.h (sparc_secondary_memory_needed):
	Declare.
	* config/sparc/sparc.c (sparc_secondary_memory_needed): New
	function.
	* config/sparc/sparc.h (SECONDARY_MEMORY_NEEDED): Use it.
	(HARD_REGNO_CALLER_SAVE_MODE): Define.
	* config/sparc/sparc.md (sethi_di_medlow, losum_di_medlow, seth44)
	(setm44, setl44, sethh, setlm, sethm, setlo, embmedany_sethi)
	(embmedany_losum, embmedany_brsum, embmedany_textuhi)
	(embmedany_texthi, embmedany_textulo, embmedany_textlo): Do not
	provide when flag_pic.

From-SVN: r227847