Slava Pestov fd6bfcab3f Runtime: New RelativeIndirectPointer template ...

We have RelativeDirectPointer and RelativeIndirectablePointer. The latter
cannot be used with function pointers because it assumes the payload is
2-byte aligned and uses the least significant bit to dynamically
distinguish a direct pointer from an indirect pointer.

For resilient conformances, we want to use protocol dispatch thunks as
keys in the witness table template. They're not 2 byte aligned, and
they're always defined in a different image, so we need an unconditional
indirect relative pointer template.

2018-03-27 16:24:18 -07:00

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