[Bug middle-end/56727] Recursive call goes through the PLT unnecessarily

[tetra2005 at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56727

--- Comment #9 from Yuri Gribov <tetra2005 at gmail dot com> ---
(In reply to Alexander Monakov from comment #8)
> Well, if my argument is correct, then GCC generates wrong code for the very
> first example in comment #0.

I believe it does (see my #5, most probly author of some pass failed to check
for interposition).  Note that simple recursive factorial is expanded to loop
too which is a more impressive instance of this bug.

> To my knowledge, that
> is the sole instance where optimization doesn't fully honor ELF
> interposition possibility.

+1