Initial Diamond Rapids Support

Initial Diamond Rapids Support

gcc/ChangeLog:

	* common/config/i386/cpuinfo.h
	(get_intel_cpu): Handle Diamond Rapids.
	* common/config/i386/i386-common.cc (processor_name):
	Add Diamond Rapids.
	(processor_alias_table): Ditto.
	* common/config/i386/i386-cpuinfo.h (enum processor_types):
	Add INTEL_COREI7_DIAMONDRAPIDS.
	* config.gcc: Add -march=diamondrapids.
	* config/i386/driver-i386.cc (host_detect_local_cpu): Handle
	diamondrapids.
	* config/i386/i386-c.cc (ix86_target_macros_internal): Ditto.
	* config/i386/i386-options.cc (processor_cost_table): Ditto.
	(m_DIAMONDRAPIDS): New.
	(m_CORE_AVX512): Add diamondrapids.
	* config/i386/i386.h (enum processor_type): Ditto.
	* doc/extend.texi: Ditto.
	* doc/invoke.texi: Ditto.

gcc/testsuite/ChangeLog:

	* g++.target/i386/mv16.C: Ditto.
	* gcc.target/i386/funcspec-56.inc: Handle new march.