gcc/

gcc/
        * common/config/i386/i386-common.c
	(OPTION_MASK_ISA_AVX512DQ_SET): Define.
	(OPTION_MASK_ISA_AVX512DQ_UNSET): Ditto.
	(ix86_handle_option): Handle OPT_mavx512dq.
	* config/i386/cpuid.h (bit_AVX512DQ): Define.
	* config/i386/driver-i386.c (host_detect_local_cpu): Detect avx512dq,
	set -mavx512dq accordingly.
	* config/i386/i386-c.c (ix86_target_macros_internal): Handle
	OPTION_MASK_ISA_AVX512DQ.
	* config/i386/i386.c (ix86_target_string): Handle -mavx512dq.
	(ix86_option_override_internal): Define PTA_AVX512DQ, handle
	PTA_AVX512DQ and OPTION_MASK_ISA_AVX512DQ.
	(ix86_valid_target_attribute_inner_p): Handle OPT_mavx512dq.
	* config/i386/i386.h (TARGET_AVX512DQ): Define.
	(TARGET_AVX512DQ_P(x)): Ditto.
	* config/i386/i386.opt: Add mavx512dq.

Co-Authored-By: Andrey Turetskiy <andrey.turetskiy@intel.com>
Co-Authored-By: Anna Tikhonova <anna.tikhonova@intel.com>
Co-Authored-By: Ilya Tocar <ilya.tocar@intel.com>
Co-Authored-By: Ilya Verbin <ilya.verbin@intel.com>
Co-Authored-By: Kirill Yukhin <kirill.yukhin@intel.com>
Co-Authored-By: Maxim Kuznetsov <maxim.kuznetsov@intel.com>
Co-Authored-By: Michael Zolotukhin <michael.v.zolotukhin@intel.com>
From-SVN: r213757