[Concurrency] Reference dispatch_async_swift_job directly when the header is available. #73945
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@swift-ci please test |
…ader is available. Only use dlsym when we don't have the header, since it's an unnecessary performance hit. rdar://118465481
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Forgot the weak-link check. |
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@swift-ci please test |
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@swift-ci please test |
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Only use dlsym when we don't have the header, since it's an unnecessary performance hit.
rdar://118465481