[5.3] parse COW support builtins as no-ops #32600
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This enables using the 5.3 compiler with a Swift.interface from a master compiler.
Instead, just ignore them.
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airspeedswift
approved these changes
Jul 6, 2020
AnthonyLatsis
added
swift 5.3
🍒 release cherry pick
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Also: don't crash on unknown array semantics attributes
This enables using the 5.3 compiler with a Swift.interface from a master compiler.
rdar://problem/64760831
Explanation: this change is needed to be able to use the 5.3 compiler with a Swift.interface from a master compiler.
Scope: Without this change the compiler will complain about unknown builtins when using a newer SDK.
Radar: rdar://problem/64760831
Risk: zero when using the corresponding version of the library. This swift version does not use the builtins in the library, so this change is a no-op.
Reviewer: @aschwaighofer