With some changes that I am making, we will no longer need this flag at the SIL level, so we can just make it an IRGen flag (which it really should have been in the first place). (cherry picked from commit 361e63c815)
361e63c815
#include "swift/Basic/Assertions.h"
-emit-supported-features
-emit-supported-arguments
ExtensibleEnums
LockFileManager