swift234

[sil-cse] Types of basic block arguments should be updated during the CSE of open_existential_ref (#3559)

Opened archetypes may be used by types of basic block arguments. Therefore, when performing the CSE of open_existential_ref instructions, one should also update the type of any basic block argument that may have used the archetype opened by the open_existential_ref being replaced.

rdar://problem/27386065