Add more verbose loggign for if_op shape errors

src/include/migraphx/op/if_op.hpp

@@ -54,7 +54,8 @@ struct if_op
         if(not std::equal(
                out_shapes1.begin(), out_shapes1.end(), out_shapes0.begin(), out_shapes0.end()))
         {
-            MIGRAPHX_THROW("IF: output shapes of submodules must be the same.");
+            MIGRAPHX_THROW("IF:" + mods[0]->name() + " & " + mods[1]->name() +
+                           " output shapes of submodules must be the same.");
         }
 
         return {out_shapes0};