Arnold Schwaighofer 9f2b6a4ebb Reuse _ContiguousArrayStorage<AnyObject> metadata for any class or objc generic type ...

Reduces the number of _ContiguousArrayStorage metadata.

In order to support constant time bridging we do need to set the correct
metadata when we bridge to Objective-C. This is so that the type check
succeeds when bridging back from Objective-C to reuse the storage
instance rather than bridging the elements.

To support dynamically setting the `_ContiguousArrayStorage` element
type i needed to add support for optimizing `alloc_ref_dynamic`
throughout the optimizer.

Possible future improvements:
* Use different metadata such that we can disambiguate native Swift
  classes during destruction -- allowing native release rather then unknown
  release usage.
* Optimize the newly added semantic function
  getContiguousArrayStorageType

rdar://86171143

2022-02-16 07:55:34 -08:00

5.6 KiB

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