* config/sparc/sparc-opts.h (PROCESSOR_NIAGARA3,
	PROCESSOR_NIAGARA4): New.
	* config/sparc/sparc.opt: Handle new processor types.
	* config/sparc/sparc.md: Add to "cpu" attribute.
	* config/sparc/sparc.h (TARGET_CPU_niagara3,
	TARGET_CPU_niagara4): New, treat as niagara2.
	* config/sparc/linux64.h: Handle niagara3 and niagara4
	like niagara2.
	* config/sparc/sol2.h: Likewise.
	* config/sparc/niagara2.md: Schedule niagara3 like
	niagara2.
	* config/sparc/sparc.c (sparc_option_override): Add
	niagara3 and niagara4 handling.
	(sparc32_initialize_trampoline): Likewise.
	(sparc64_initialize_trampoline): Likewise.
	(sparc_use_sched_lookahead): Likewise.
	(sparc_issue_rate): Likewise.
	(sparc_register_move_cost): Likewise.
	* config/sparc/driver-sparc.c (cpu_names): Use niagara3
	and niagara4 as appropriate.
	* doc/invoke.texi: Document new processor types.

From-SVN: r178554