[Bug target/78255] [5/6/7 regression] Indirect sibling call causing wrong code generation for ARM

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78255

--- Comment #9 from Jeffrey A. Law <law at redhat dot com> ---
Also note that on some targets indirect calls have a different ABI than calls
to named function.  SO changing between direct and indirect calls is strictly
forbidden on some targets.

I suspect there's some magic we need to replicate in postreload-gcse from
cse/gcse/combine to prevent this from occurring unnecessarily.