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alexander.azarov
3661db5fc5
See https://github.com/swiftlang/swift/issues/88767. SILDynamicCastInst::getLoweredBridgedTargetObjectType wrapped the formal bridged target type via SILType::getPrimitiveObjectType, which preserves DynamicSelfType. SIL type lowering strips DynamicSelfType (LoweredRValueTypeVisitor::visitDynamicSelfType), so consumers that compared the helper's result against a lowered SIL type disagreed whenever an as? cast's target was Self inside an extension of a bridgeable class (e.g. NSDecimalNumber, NSString). An assertion in CastOptimizer::computeFinalCastedValue tripped, crashing the compiler. Route the helper through the containing SILFunction's TypeConverter so DynamicSelfType is stripped consistently with every other cast-type consumer. Both call sites (computeFinalCastedValue and convertObjectToLoadableBridgeableType) get the fix without further changes. This follows the pattern established in #85128 for the analogous inconsistency in canOptimizeCast.
21 lines
429 B
Swift
21 lines
429 B
Swift
// RUN: %target-swift-frontend -emit-sil -verify %s
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// RUN: %target-swift-frontend -O -emit-sil -verify %s
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// REQUIRES: objc_interop
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// Regression test for https://github.com/swiftlang/swift/issues/88767
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import Foundation
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extension NSDecimalNumber {
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static func roundtrip(_ d: Decimal) -> Self? {
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return d as? Self
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}
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}
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extension NSString {
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static func roundtrip(_ s: String) -> Self? {
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return s as? Self
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}
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}
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