rs6000: Fix typo in rs6000_expand_vector_init

Of course we don't support vectors of size <= 4.
We're supposed to be checking the vector element size.

From-SVN: r179957

gcc/ChangeLog

@@ -15,6 +15,9 @@
 	* tree-vect-generic.c (expand_vector_operations_1): Don't do that
 	here; always simplify to scalar shift of vector if possible.
 
+	* config/rs6000/rs6000.c (rs6000_expand_vector_init): Fix mode
+	test for vector splat.
+
 2011-10-13  Jakub Jelinek  <jakub@redhat.com>
 
 	* config/i386/sse.md (vec_set<mode>): Change V_128 iterator mode

gcc/config/rs6000/rs6000.c

@@ -4758,7 +4758,7 @@ rs6000_expand_vector_init (rtx target, rtx vals)
 
   /* Store value to stack temp.  Load vector element.  Splat.  However, splat
      of 64-bit items is not supported on Altivec.  */
-  if (all_same && GET_MODE_SIZE (mode) <= 4)
+  if (all_same && GET_MODE_SIZE (inner_mode) <= 4)
     {
       mem = assign_stack_temp (mode, GET_MODE_SIZE (inner_mode), 0);
       emit_move_insn (adjust_address_nv (mem, inner_mode, 0),