And now the final correct version of the subarray function. The problem

with the last one was that the resized function only set the soft lb and ub
markers without actually moving the usefull data up to the correct
displacement. Using a struct instead solve the problem. Anyway, as defined
in the MPI standard we have to set the lower bound and the upper bound
of the new type to the correct values too.

This commit was SVN r10328.

ompi/mpi/c/type_create_subarray.c

@@ -109,8 +109,21 @@ int MPI_Type_create_subarray(int ndims,
         last_type = *newtype;
     }
     
-    ompi_ddt_create_resized( last_type, displ * extent,
-                             (size - start_array[start_loop]) * extent, newtype );
+    /**
+     * We cannot use resized here. Resized will only set the soft lb and ub markers
+     * without moving the real data inside. What we need is to force the displacement
+     * of the data create upward to the right position AND set the LB and UB. A type
+     * struct is the function we need.
+     */
+    {
+        MPI_Aint displs[3];
+        MPI_Datatype types[3];
+        int blength[3] = { 1, 1, 1 };
+
+        displs[0] = 0; displs[1] = displ * extent; displs[2] = size * extent;
+        types[0] = MPI_LB; types[1] = last_type; types[2] = MPI_UB;
+        ompi_ddt_create_struct( 3, blength, displs, types, newtype );
+    }
     ompi_ddt_destroy( &last_type );
     
     {