[Bug target/77493] [6/7 Regression] -fcrossjumping (-O2) on ppc64le causes segfaults (jump to 0x0) (first bad r230091)

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77493

--- Comment #13 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #11)
> CCing libstdc++ people -- not sure if std::stable_sort (on which kind of
> collection?) is safe for std::shared_ptr.

It's required to work correctly. It should be equivalent to sorting
TrackingRecHit* pointers.