Michael Gottesman a7bb61265c [deserialization] Tighten up deserialization of witness tables. ...

We now enforce via an assert that each witness table is unique and that
every protocol conformance that is referenceable from SIL must have a
witness table matched to it.

Also, I taught the linker that it should deserialize witness tables for
InitExistentialRefInst instructions, something that was missed before.

Swift SVN r17283

2014-05-02 22:28:13 +00:00

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