[Bug ipa/111643] __attribute__((flatten)) with -O1 runs out of memory (killed cc1)

["lukas.graetz@tu-darmstadt.de" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111643

--- Comment #3 from Lukas Grätz <lukas.graetz@tu-darmstadt.de> ---
(In reply to Marc Glisse from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > I am 99% sure this is falls under don't do this as flatten inlines
> > everything it can that the function calls ...
> 
> Maybe people end up abusing flatten because we are missing a convenient way
> for a caller to ask that a call be inlined? From the callee, we can use
> always_inline (couldn't this be used on name_original in this testcase?),
> but from the caller... Here even a non-recursive version of flatten would
> have helped.

Yes, this was what I was searching for, but I found only flatten. Also, that
flatten is applied recursively is not mentioned in the documentation and it is
also not what I would expect.

https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html

I don't want to always_inline name_original. What I want is to only inline
name_original when called by the wrapper function name, hence the flatten.
Because I replace every call to name with name_original where I don't want to
apply the instrumentation by the wrapper function name.

Thanks!