Doug Gregor 69cc9f4b54 [Serialization] Unique SIL generic environments when serializing. ...

Teach the serialization of SIL generic environments, which used to be
a trailing record following the SIL function definition, to use the
same uniqued "generic environment IDs" that are used for the AST
generic environments. Many of them overlap anyway, and SIL functions
tend to have AST generic environments anyway.

This approach guarantees that the AST + SIL deserialization provide
the same uniqueness of generic environments present prior to
serialization.

2017-01-05 18:24:55 -08:00

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