Adds optimized emit for int64 constants#3620

Merged

KevinRansom merged 2 commits intodotnet:masterfrom

ChrSteinert:master

Sep 25, 2017

Commits on Sep 20, 2017

Adds optimized emit for int64 constants.
ChrSteinert
committed

Commits on Sep 21, 2017

Adds comment linking to the changing PR.
ChrSteinert
committed