Expose pop count primitives to cmm
I can't actually invoke the various
MO_PopCnt width prim ops from the literal Cmm syntax.
Would it be possible to expose them via
This would enable me to generate much more efficient code.
I started hacking up a mostly Cmm-side implementation of a HashMap. This lets me directly index into fields in data constructors and the like, eliding the indirection of the array machinery and allowing a much more direct implementation. Other than this, until this point it has been going remarkably smoothly.