Joe Groff 77b012af1d SIL: Add an [exact_self_class] function attribute. ...

This indicates that the "self" argument to the current function is always dynamically of the exact
static base class type, allowing metadata accesses in IRGen to use the local self metadata to answer
metadata requests for the class type. Set this attribute on allocating entry points of designated
inits, which is one of the most common places where we emit redundant metadata accesses.

2019-08-08 14:03:07 -07:00

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