[Bug c++/110845] Function call when it should inline?

[xry111 at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110845

Xi Ruoyao <xry111 at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |xry111 at gcc dot gnu.org
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #3 from Xi Ruoyao <xry111 at gcc dot gnu.org> ---
(In reply to KL from comment #2)
> Changed main to foo:
> same behavior

It's because you don't have a return statement in foo, causing an undefined
behavior.  And GCC considers undefined behaviors highly improbable to be
executed, so the same logic (not to inline too much into "cold" code paths)
still applies.

If you add the return statement they are inlined:

https://godbolt.org/z/Ko9r4fn3d