+
+ arguments_size = bytes_per_word * length offsets_to_pushW
+#if darwin_TARGET_OS
+ -- Darwin: align stack frame size to a multiple of 16 bytes
+ stack_frame_size = (arguments_size + 15) .&. complement 15
+ stack_frame_pad = stack_frame_size - arguments_size
+#else
+ stack_frame_size = arguments_size
+#endif