[Bug tree-optimization/105216] [12 regression] 8% regression for m-queens compared to gcc11 O2 on CLX.

[crazylht at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105216

--- Comment #10 from Hongtao.liu <crazylht at gmail dot com> ---
Probably related to below 3 cancelled jump thread which affects pre.

2076Threading through latch before loop opts would create non-empty latch:
2077  Cancelling jump thread: (15, 16) incoming edge;  (16, 43) normal;

3742Path crosses loops:
3743  Cancelling jump thread: (36, 3) incoming edge;  (3, 37) normal (37, 4)
nocopy;

4755Threading through latch before loop opts would create non-empty latch:
4756  Cancelling jump thread: (26, 28) incoming edge;  (28, 40) normal;