popcnt intrinsic unused

[Kagamin via digitalmars-d-ldc]

On Tuesday, 19 January 2016 at 20:01:31 UTC, David Nadlinger 
wrote:
> Either way, one of the next important goals for LDC should be 
> finally implementing proper force-inline support (that, unlike 
> DMD's pragma, also works when the inliner is not otherwise 
> active, and across all module boundaries).

Why? Stefan is compiling with -O3.