(finish_struct): Don't mess with the type of bitfields.

From-SVN: r10673

gcc/c-decl.c

@@ -5690,27 +5690,6 @@ finish_struct (t, fieldlist, attributes)
       TYPE_ALIGN (x) = TYPE_ALIGN (t);
     }
 
-  /* Promote each bit-field's type to int if it is narrower than that.  */
-  for (x = fieldlist; x; x = TREE_CHAIN (x))
-    if (DECL_BIT_FIELD (x)
-	&& (C_PROMOTING_INTEGER_TYPE_P (TREE_TYPE (x))
-	    || DECL_FIELD_SIZE (x) < TYPE_PRECISION (integer_type_node)))
-      {
-	tree type = TREE_TYPE (x);
-
-	/* Preserve unsignedness if traditional
-	   or if not really getting any wider.  */
-	if (TREE_UNSIGNED (type)
-	    && (flag_traditional
-		||
-		(TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node)
-		 &&
-		 DECL_FIELD_SIZE (x) == TYPE_PRECISION (integer_type_node))))
-	  TREE_TYPE (x) = unsigned_type_node;
-	else
-	  TREE_TYPE (x) = integer_type_node;
-      }
-
   /* If this was supposed to be a transparent union, but we can't
      make it one, warn and turn off the flag.  */
   if (TREE_CODE (t) == UNION_TYPE