https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98365
--- Comment #1 from Hongtao.liu <crazylht at gmail dot com> ---
> Shouldn't cnt_21 = PHI <cnt_9(7), 0(15)>, stmt relevant?
>
for stmt: cnt.1_7 = (unsigned char) cnt_21, the operand is defined by a
previous iteration of the loop which is assumed to be handled in
induction/reduction.
But vect_analyze_scalar_cycles can't get reduction of cnt as (cnt_9 = _3 == _6
? cnt_16 : cnt_21;_ since scalar evolution only handle
- an SSA_NAME,
- an INTEGER_CST,
- a PLUS_EXPR,
- a POINTER_PLUS_EXPR,
- a MINUS_EXPR,
- an ASSERT_EXPR,
- other cases are not yet handled. */
