i386: Fix k*shift* intrinsics [PR93673]

i386: Fix k*shift* intrinsics [PR93673]

As mentioned in the PR, the intrinsics allow counts from 0 to 255, but
we actually reject values from 128 to 255.  That is because QImode
CONST_INTs can be only -128 to 127.  Fixed by using const_0_to_255_operand
and dropping the modes for the operands with those predicates
(the IL actually contains the CONST_INT which has VOIDmode).

2020-02-13  Jakub Jelinek  <jakub@redhat.com>

	PR target/93673
	* config/i386/sse.md (k<code><mode>): Drop mode from last operand and
	use const_0_to_255_operand predicate instead of immediate_operand.
	(avx512dq_fpclass<mode><mask_scalar_merge_name>,
	avx512dq_vmfpclass<mode><mask_scalar_merge_name>,
	vgf2p8affineinvqb_<mode><mask_name>,
	vgf2p8affineqb_<mode><mask_name>): Drop mode from
	const_0_to_255_operand predicated operands.

	* gcc.target/i386/avx512f-pr93673.c: New test.
	* gcc.target/i386/avx512dq-pr93673.c: New test.
	* gcc.target/i386/avx512bw-pr93673.c: New test.