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[IRGen] Mangling of nonisolated(nonsending) function types was introduced in Swift 6.2

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We can't use mangled named when back-deploying earlier.
This commit is contained in:
Doug Gregor
2025-07-11 14:23:59 -07:00
parent a73650c5ac
commit badba55bf1
2 changed files with 25 additions and 1 deletions
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9
lib/IRGen/GenReflection.cpp
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@@ -204,9 +204,10 @@ getRuntimeVersionThatSupportsDemanglingType(CanType type) {
Swift_5_5,
Swift_6_0,
Swift_6_1,
Swift_6_2,
// Short-circuit if we find this requirement.
Latest = Swift_6_1
Latest = Swift_6_2
};
VersionRequirement latestRequirement = None;
@@ -223,6 +224,11 @@ getRuntimeVersionThatSupportsDemanglingType(CanType type) {
auto isolation = fn->getIsolation();
auto sendingResult = fn->hasSendingResult();
// The mangling for nonisolated(nonsending) function types was introduced
// in Swift 6.2.
if (isolation.isNonIsolatedCaller())
return addRequirement(Swift_6_2);
// The Swift 6.1 runtime fixes a bug preventing successful demangling
// when @isolated(any) or global actor isolation is combined with a
// sending result.
@@ -290,6 +296,7 @@ getRuntimeVersionThatSupportsDemanglingType(CanType type) {
});
switch (latestRequirement) {
case Swift_6_2: return llvm::VersionTuple(6, 2);
case Swift_6_1: return llvm::VersionTuple(6, 1);
case Swift_6_0: return llvm::VersionTuple(6, 0);
case Swift_5_5: return llvm::VersionTuple(5, 5);

17
test/IRGen/backward_deploy_nonisolated_nonsending_function_type.swift Normal file
View File

@@ -0,0 +1,17 @@
// RUN: %target-swift-frontend -target %target-cpu-apple-macos12 -emit-ir -o - -primary-file %s | %FileCheck %s
// REQUIRES: concurrency
// REQUIRES: OS=macosx
func useGenericMetatype(_ type: Any.Type) { }
// CHECK-LABEL: define hidden swiftcc void @"$s52backward_deploy_nonisolated_nonsending_function_type29testNonisolatedNonsendingTypeyyF"()
func testNonisolatedNonsendingType() {
typealias Fn = nonisolated(nonsending) () async throws -> Int
// CHECK: call swiftcc %swift.metadata_response @"$sSiyYaKYCcMa"
// CHECK: call swiftcc void @"$s52backward_deploy_nonisolated_nonsending_function_type18useGenericMetatypeyyypXpF"
useGenericMetatype(Fn.self)
}
// CHECK-LABEL: define linkonce_odr hidden swiftcc %swift.metadata_response @"$sSiyYaKYCcMa"
// CHECK: call ptr @swift_getExtendedFunctionTypeMetadata(i{{32|64}} 2768240640, {{i32|i64}} 0, ptr null, ptr null, ptr @"$sSiN"