[Bug tree-optimization/115979] Implicitly generated C++ calls stop musttail search early

[andi-gcc at firstfloor dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115979

--- Comment #3 from Andi Kleen <andi-gcc at firstfloor dot org> ---
Doing it in the frontend would require some duplication between C/C++ at least?

I was thinking to just keep searching if has_mustail is set, but was wary of
endless loops walking single basic block precessors. But I presume if they
could happen they could already happen.