[Bug ipa/121936] [14/15/16 Regression] Invalid optimisation (at O3) based on bodies of vague linkage functions

[jamborm at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121936

--- Comment #24 from Martin Jambor <jamborm at gcc dot gnu.org> ---
(In reply to Martin Jambor from comment #21)
> [...]
> First, it uses externally_visible flag before it is actually computed.
> 

I have looked at this together with Honza and the invocation where
this is happening is actually not relevant for this case (and likely
is harmless in general).  The DECL_DECLARED_INLINE_P test is what
matters.