popcnt intrinsic unused

[Kagamin via digitalmars-d-ldc]

On Wednesday, 20 January 2016 at 17:35:02 UTC, Stefan Koch wrote:
> Because the runtime is not visible as source-code.
> If it were, llvm could make this into the popcnt instruction.
> But the inliner is blind when it calls a library...

If a function has pragma(inline) and inliner doesn't inline it, 
then the pragma is not implemented. And how dmd does it if the 
function source is not visible?