swift

64eeed83 - [pmo] Add an assert that when using SILSSAUpdater in ossa, we only have singular values if the underlying type is either trivial or we have a take.

[pmo] Add an assert that when using SILSSAUpdater in ossa, we only have singular values if the underlying type is either trivial or we have a take. The reason why this is true is that we will be inserting new copy_values for each available value implying that we can never have such a singular value. I also added two test cases that show that we have a singular value with the trivial type and that works.