2017-08-08  Daniel Santos  <daniel.santos@pobox.com>

	* lib/target-supports.exp (check_avx512_os_support_available): New
	Procedure.
	(check_avx2_hw_available): Modify.
	(check_avx512f_hw_available): New Procedure.
	(check_effective_target_avx512f_runtime): Likewise.
	* gcc.target/i386/pr80969-1.c: New testcase.
	* gcc.target/i386/pr80969-2a.c: Likewise.
	* gcc.target/i386/pr80969-2.c: Likewise.
	* gcc.target/i386/pr80969-3.c: Likewise.
	* gcc.target/i386/pr80969-4a.c: Likewise.
	* gcc.target/i386/pr80969-4b.c: Likewise.
	* gcc.target/i386/pr80969-4.c: Likewise.