[Bug tree-optimization/110838] [14 Regression] wrong code on x365-3.5, -O3, sign extraction

[rguenth at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110838

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
=> 0x00000000004009ae <+126>:   ud2    

confirmed.

(gdb) p dst_ok
$1 = "\001\377\001\377\001\001\377\377\001"
(gdb) p dst
$2 = "\001\000\001\000\001\001\000\000\001"

I think we have a bug somewhere about a bug in pattern matching with a widening
op.