[Bug target/119731] bpf verifier failure with systemd's restrict-fs

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119731

--- Comment #15 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #14)
> Just a quick update. It looks like undefined code in the verifier producing
> a verification error.

Sorry this is incorrect. basically the problem is we have:
a <<= 32
a s>>= 32

which is a sign extend but the verifier loses track of what the value a
contained originally.