David Farler a53a31cb6e SILGen: Use super_method for native non-final methods in classes ...

Use the `super_method` instruction for non-final `func` and `class func`
declarations in native Swift classes. Previously, we would always emit
a static `function_ref` for these, which prevents resilient dynamic
dispatch.

This is hidden behind a -use-native-super-dispatch flag while I
survey the effects on devirtualization and stack promotion. When
that's figured out, I'll add more tests and update test cases that
still assume static dispatch.

rdar://problem/22749732

2015-12-05 13:06:31 -08:00

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