/* The following exposes the use of "x" to CSE. */
if (GET_MODE_SIZE (GET_MODE (x)) <= UNITS_PER_WORD
&& SCALAR_INT_MODE_P (GET_MODE (x))
- && TRULY_NOOP_TRUNCATION (GET_MODE_BITSIZE (mode),
- GET_MODE_BITSIZE (GET_MODE (x)))
+ && TRULY_NOOP_TRUNCATION_MODES_P (mode, GET_MODE (x))
&& !reload_completed)
return gen_lowpart_general (mode, force_reg (GET_MODE (x), x));