https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69039
--- Comment #5 from vries at gcc dot gnu.org ---
We have reduction stmt _6 with loop phi prephitmp_11:
...
fn1 (unsigned int d)
{
_Bool b_lsm.5;
unsigned int b_lsm.4;
int i;
unsigned int pretmp_1;
unsigned int ivtmp_4;
unsigned int _6;
unsigned int _9;
unsigned int prephitmp_11;
unsigned int ivtmp_12;
<bb 2>:
pretmp_1 = b;
<bb 3>:
# i_13 = PHI <i_8(4), 0(2)>
# prephitmp_11 = PHI <_6(4), pretmp_1(2)>
# ivtmp_4 = PHI <ivtmp_12(4), 1000(2)>
_6 = d_5(D) | prephitmp_11;
i_8 = i_13 + 1;
ivtmp_12 = ivtmp_4 - 1;
if (ivtmp_12 != 0)
goto <bb 4>;
else
goto <bb 5>;
<bb 4>:
goto <bb 3>;
<bb 5>:
# _9 = PHI <_6(3)>
# b_lsm.4_17 = PHI <_6(3)>
b = b_lsm.4_17;
return _9;
}
...
There are however two corresponding loop exit phis: _9 and b_lsm.4_17.
We only track one in the keep_res field of struct reduction_info.
