https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101001
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2021-06-10
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
Depends on| |100934
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
We end up with
<bb 2> [count: 0]:
b.1_18 ={v} b;
b.1_5 ={v} b;
...
b.1_1 ={v} b;
__builtin_unreachable ();
}
sounds related to PR100934, "fixed" with -fdisable-tree-cunroll.
Loop 1 iterates at most 15 times.
Loop 1 likely iterates at most 15 times.
-fdisable-tree-thread2 "fixes" it as well. Likely a duplicate.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100934
[Bug 100934] [9/10/11/12 Regression] wrong code at -O3 during unrolling since
r9-6299
