https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111043
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2023-08-20
Ever confirmed|0 |1
--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed. In both cases copying the loop header gets rid of the loop which now
hits the unreachable.
In the first case before ch_vect we have:
```
<bb 2> [local count: 118111600]:
e = 0;
d = 2;
goto <bb 6>; [100.00%]
<bb 5> [local count: 955630224]:
e.8_3 = (unsigned short) e_lsm.21_6;
_4 = e.8_3 + 8;
_5 = (short int) _4;
<bb 6> [local count: 1073741824]:
# e_lsm.21_6 = PHI <0(2), _5(5)>
# e_lsm_flag.22_41 = PHI <0(2), 1(5)>
_11 = (int) e_lsm.21_6;
_12 = _11;
if (_12 != 0)
goto <bb 5>; [89.00%]
else
goto <bb 7>; [11.00%]
```
And ch_vect goes and copies bb6 for bb2 and things go down hill from there.
