[Bug c++/77896] Object vtable lookups are not hoisted out of loops

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77896

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Basically what I am trying to say is there is a lot of analysis needed to
determine if the lifetime of object does not end during a call to a virtual
function.

> Altering the test case to trigger speculative devirtualization as follows:

This is a dup of another bug which says once it has been speculative to a
specific function which does not change the lifetime of the object, we can
split the loop.  That is a dup of bug 67886 really.