[IRGen] Map result to native representation in emitAsyncReturn #80287
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rdar://147872231 When an async typed throwing function had a result type that combined multiple fields into a single register, we created invalid IR, that could lead to compiler crashes or in some cases even miscompiles. With this fix we are mapping the result to the native representation before mapping it to the combined result type.
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aschwaighofer
approved these changes
Mar 26, 2025
This was referenced Mar 27, 2025
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rdar://147872231
When an async typed throwing function had a result type that combined multiple fields into a single register, we created invalid IR, that could lead to compiler crashes or in some cases even miscompiles. With this fix we are mapping the result to the native representation before mapping it to the combined result type.