Use target_expr based stabilize in component_ref

Author: ibuclaw

gcc/d/d-codegen.cc

@@ -1323,7 +1323,7 @@ component_ref (tree object, tree field)
   gcc_assert (TREE_CODE (field) == FIELD_DECL);
 
   /* Maybe rewrite: (e1, e2).field => (e1, e2.field)  */
-  tree init = stabilize_expr (&object);
+  tree init = stabilize_expr2 (&object);
 
   /* If the FIELD is from an anonymous aggregate, generate a reference
      to the anonymous data member, and recur to find FIELD.  */