rtl.h (gen_rtx_CONST_VECTOR): Declare.

	* rtl.h (gen_rtx_CONST_VECTOR): Declare.
	* gengenrtl.c (special_rtx): Check for CONST_VECTOR.
	* emit-rtl.c (gen_rtx_CONST_VECTOR): New function.
	(gen_const_vector_0): Use it.

From-SVN: r55395