fix CTOR vectorization

We failed to handle pattern stmts appropriately.

2020-03-20  Richard Biener  <rguenther@suse.de>

	* tree-vect-slp.c (vect_analyze_slp_instance): Push the stmts
	to vectorize for CTOR defs.

gcc/ChangeLog

+2020-03-20  Richard Biener  <rguenther@suse.de>
+
+	* tree-vect-slp.c (vect_analyze_slp_instance): Push the stmts
+	to vectorize for CTOR defs.
+
 2020-03-20  Srinath Parvathaneni  <srinath.parvathaneni@arm.com>
             Andre Vieira  <andre.simoesdiasvieira@arm.com>
             Mihail Ionescu  <mihail.ionescu@arm.com>

gcc/tree-vect-slp.c

@@ -2257,6 +2257,7 @@ vect_analyze_slp_instance (vec_info *vinfo,
 	      /* Value is defined in another basic block.  */
 	      if (!def_info)
 		return false;
+	      def_info = vect_stmt_to_vectorize (def_info);
 	      scalar_stmts.safe_push (def_info);
 	    }
 	  else