Either I'm confused or the gc is

[Ola Fosheim Grøstad]

On Monday, 16 November 2020 at 21:25:03 UTC, Steven Schveighoffer 
wrote:
> I can imagine a situation where it removes the item from the 
> stack to put it somewhere else (e.g. global memory or on the C 
> heap) *temporarily*, and by the time the function exits, the 
> pointer is no longer in use in C-land. Thus, the function 
> doesn't "save the pointer".
>
> This kind of problem would still be susceptible to the GC 
> collecting it (via another thread), and so I would recommend 
> still storing locally in the calling function a copy of the 
> pointer.

How do you express that? LLVM can remove unused pointers? There 
are intrinsics to combat that, but is there something portable in 
D?