[5.9] [SILGen] Emit block after unreachable when emitting if/switch expressions #66571
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…ions When emitting the underlying `switch` statement for a `switch` expression, we emit an `unreachable` if the subject is uninhabited. Statement emission code can handle this, but expression emission expects an RValue to handed back. To remedy this, emit an unreachable block that we can emit the rest of the expression emission code into. The SILOptimizer will then drop this unreachable block.
hamishknight
added
🍒 release cherry pick
|
@swift-ci please test |
DougGregor
approved these changes
Jun 13, 2023
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5.9 cherry-pick of #66551