This backport contains 1 patch from gcc main stream tree.
The commit id of these patchs list as following in the order of time.

0001-fix-CTOR-vectorization.patch
3d42842c07f4143042f3dcc39a050b262bcf1b55

diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c
index 9d17e3386fa..fb13af7965e 100644
--- a/gcc/tree-vect-slp.c
+++ b/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