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When Embedded Swift emits a symbol that was imported from another module, ensure that the symbol is emitted as a weak definition. This way, importing the same module (and using its symbol) into several different modules doesn't cause duplicate-symbol errors at link time. Rather, the linker will merge the different symbol definitions. This makes Embedded Swift libraries work without resorting to `-mergeable-symbols` or `-emit-empty-object-file`.
51 lines
1.8 KiB
Swift
51 lines
1.8 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-swift-frontend -enable-experimental-feature Embedded -parse-as-library -module-name main %s -emit-ir | %FileCheck --check-prefix=CHECK-IR %s
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// RUN: %target-swift-frontend -enable-experimental-feature Embedded -parse-as-library -module-name main %s -c -o %t/a.o
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// RUN: %target-clang %t/a.o -o %t/a.out -L%swift_obj_root/lib/swift/embedded/%module-target-triple %target-clang-resource-dir-opt -lswift_Concurrency %target-swift-default-executor-opt -dead_strip
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// RUN: %target-run %t/a.out | %FileCheck %s
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// REQUIRES: executable_test
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// REQUIRES: swift_in_compiler
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// REQUIRES: optimized_stdlib
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// REQUIRES: OS=macosx || OS=wasip1
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// REQUIRES: swift_feature_Embedded
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import _Concurrency
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actor MyActor {
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var value: Int = 42
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func foo() async {
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print("value: \(value)")
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}
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func thisIsUnused() async {
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print("unused")
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}
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}
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@main struct Main {
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static func main() async {
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let n = MyActor()
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await n.foo()
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}
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}
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// CHECK-IR: @swift_deletedAsyncMethodErrorTu =
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// CHECK-IR: @"$e4main7MyActorCN" = global <{ ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }> <{
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// CHECK-IR-SAME: ptr null,
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// CHECK-IR-SAME: ptr @"$e4main7MyActorCfD",
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// CHECK-IR-SAME: ptr null,
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// CHECK-IR-SAME: ptr @swift_deletedMethodError,
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// CHECK-IR-SAME: ptr @swift_deletedMethodError,
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// CHECK-IR-SAME: ptr @swift_deletedMethodError,
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// CHECK-IR-SAME: ptr @"$e4main7MyActorC3fooyyYaFTu",
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// CHECK-IR-SAME: ptr @got.swift_deletedAsyncMethodErrorTu,
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// CHECK-IR-SAME: ptr @"$e4main7MyActorCACycfC"
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// CHECK-IR-SAME: }>, align {{[48]}}
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// CHECK-IR-NOT: $e4main7MyActorC12thisIsUnusedyyYaF
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// CHECK-IR: define weak_odr {{swifttailcc|swiftcc}} void @swift_deletedAsyncMethodError(ptr swiftasync %0)
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// CHECK: value: 42
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