constraints.md (BC): Only allow -1 operands.

constraints.md (BC): Only allow -1 operands.

	* config/i386/constraints.md (BC): Only allow -1 operands.
	* config/i386/sse.md (mov<mode>_internal): Add (v,C) alternative.
	Add "enabled" attribute.  Update XI mode attribute calculation.
	* config/i386/i386.md (*movxi_internal_avx512f): Add (v,C) alternative.
	(*movoi_internal_avx): Update XI mode attribute calculation.
	(*movti_internal): Ditto.

testsuite/ChangeLog:

	* gcc.target/i386/avx256-unaligned-load-1.c: Update scan strings.
	* gcc.target/i386/avx256-unaligned-store-1.c: Ditto.
	* gcc.target/i386/avx256-unaligned-store-2.c: Ditto.
	* gcc.target/i386/avx256-unaligned-store-3.c: Ditto.
	* gcc.target/i386/avx256-unaligned-store-4.c: Ditto.

From-SVN: r235693