predicates.md (gpc_reg_operand): Don't allow all hard registers numbered greater...

predicates.md (gpc_reg_operand): Don't allow all hard registers numbered greater or equal to ARG_POINTER_REGNUM.

	* config/rs6000/predicates.md (gpc_reg_operand): Don't allow all
	hard registers numbered greater or equal to ARG_POINTER_REGNUM.
	(reg_or_neg_short_operand, fix_trunc_dest_operand): Delete
	unused predicates.
	* config/rs6000/altivec.md (save_vregs_*, restore_vregs_*):
	Use altivec_register_operand.  Make insn predicate TARGET_ALTIVEC.
	* config/rs6000/rs6000.md (extzvdi_internal2): Use cc_reg_operand.
	* config/rs6000/vsx.md (vsx_float<VSi><mode>2): Expand comment.

From-SVN: r223335