S/390 Add -march/-mtune=z13 option.

S/390 Add -march/-mtune=z13 option.

gcc/
	* common/config/s390/s390-common.c (processor_flags_table): Add
	z13.
	* config.gcc: Add z13.
	* config/s390/s390-opts.h (enum processor_type): Add
	PROCESSOR_2964_Z13.
	* config/s390/s390.c (s390_adjust_priority): Check for
	PROCESSOR_2964_Z13.
	(s390_reorg): Likewise.
	(s390_sched_reorder): Likewise.
	(s390_sched_variable_issue): Likewise.
	(s390_loop_unroll_adjust): Likewise.
	(s390_option_override): Likewise. Default to -mvx when available.
	* config/s390/s390.h (enum processor_flags): Add PF_Z13 and PF_VX.
	(TARGET_CPU_Z13, TARGET_CPU_VX, TARGET_Z13, TARGET_VX)
	(TARGET_VX_ABI): Define macros.
	macros.
	(TARGET_DEFAULT): Add MASK_OPT_VX.
	* config/s390/s390.md ("cpu" attribute): Add z13.
	("cpu_facility" attribute): Add vec.
	* config/s390/s390.opt (processor_type): Add z13.
	(mvx): New options.
	* doc/invoke.texi: Add z13 option for -march.

From-SVN: r223393