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IRGen: Weak-link references to swift_getExtendedExistentialTypeMetadata() [5.9] #69462

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Merged
merged 1 commit into from
Oct 28, 2023
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IRGen: Weak-link references to swift_getExtendedExistentialTypeMetadata() [5.9] #69462

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9 changes: 6 additions & 3 deletions include/swift/Runtime/RuntimeFunctions.def
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Original file line number Diff line number Diff line change
Expand Up @@ -1177,7 +1177,8 @@ FUNCTION(GetExistentialMetadata,
// swift_getExtendedExistentialTypeShape(
// const NonUniqueExtendedExistentialTypeShape *nonUnique);
FUNCTION(GetExtendedExistentialTypeShape,
swift_getExtendedExistentialTypeShape, C_CC, AlwaysAvailable,
swift_getExtendedExistentialTypeShape, C_CC,
ParameterizedExistentialAvailability,
RETURNS(TypeMetadataPtrTy),
ARGS(Int8PtrTy, Int8PtrPtrTy),
ATTRS(NoUnwind, ArgMemOnly, WillReturn),
Expand All @@ -1187,7 +1188,8 @@ FUNCTION(GetExtendedExistentialTypeShape,
// const NonUniqueExtendedExistentialTypeShape *shape,
// const void * const *generalizationArgs);
FUNCTION(GetExtendedExistentialTypeMetadata,
swift_getExtendedExistentialTypeMetadata, C_CC, AlwaysAvailable,
swift_getExtendedExistentialTypeMetadata, C_CC,
ParameterizedExistentialAvailability,
RETURNS(TypeMetadataPtrTy),
ARGS(Int8PtrTy, Int8PtrPtrTy),
ATTRS(NoUnwind, ArgMemOnly, WillReturn),
Expand All @@ -1197,7 +1199,8 @@ FUNCTION(GetExtendedExistentialTypeMetadata,
// const ExtendedExistentialTypeShape *shape,
// const void * const *generalizationArgs);
FUNCTION(GetExtendedExistentialTypeMetadataUnique,
swift_getExtendedExistentialTypeMetadata_unique, C_CC, AlwaysAvailable,
swift_getExtendedExistentialTypeMetadata_unique, C_CC,
ParameterizedExistentialAvailability,
RETURNS(TypeMetadataPtrTy),
ARGS(Int8PtrTy, Int8PtrPtrTy),
ATTRS(NoUnwind, ArgMemOnly, WillReturn),
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8 changes: 8 additions & 0 deletions lib/IRGen/IRGenModule.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -924,6 +924,14 @@ namespace RuntimeConstants {
return RuntimeAvailability::ConditionallyAvailable;
}

RuntimeAvailability ParameterizedExistentialAvailability(ASTContext &Context) {
auto featureAvailability = Context.getParameterizedExistentialRuntimeAvailability();
if (!isDeploymentAvailabilityContainedIn(Context, featureAvailability)) {
return RuntimeAvailability::ConditionallyAvailable;
}
return RuntimeAvailability::AlwaysAvailable;
}

} // namespace RuntimeConstants

// We don't use enough attributes to justify generalizing the
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13 changes: 13 additions & 0 deletions test/IRGen/extended_existential_metadata_weak.swift
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@@ -0,0 +1,13 @@
// RUN: %target-swift-frontend -emit-ir %s -target %target-swift-abi-5.5-triple | %FileCheck %s
// REQUIRES: VENDOR=apple

public protocol P<A> {
associatedtype A
}

public func f<T>(_: T.Type) {}

@available(SwiftStdlib 5.7, *)
public func g<T>(_: T.Type) { f((any P<T>).self) }

// CHECK-LABEL: declare extern_weak {{.*}} @swift_getExtendedExistentialTypeMetadata(