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// Tests that under -enable-llvm-vfe + -internalize-at-link, cross-module
// virtual calls are done via thunks and LLVM GlobalDCE is able to remove unused
// virtual methods from a library based on a list of used symbols by a client.
// RUN: %empty-directory(%t)
// (1) Build library swiftmodule
// RUN: %target-build-swift -parse-as-library -Xfrontend -enable-llvm-vfe \
// RUN: %s -DLIBRARY -module-name Library \
// RUN: -emit-module -o %t/Library.swiftmodule \
// RUN: -emit-tbd -emit-tbd-path %t/libLibrary.tbd -Xfrontend -tbd-install_name=%t/libLibrary.dylib
// (2) Build client
// RUN: %target-build-swift -parse-as-library -Xfrontend -enable-llvm-vfe \
// RUN: %s -DCLIENT -module-name Main -I%t -L%t -lLibrary -o %t/main
// (3) Extract a list of used symbols by client from library
// RUN: %llvm-nm --undefined-only -m %t/main | grep 'from libLibrary' | awk '{print $3}' > %t/used-symbols
// (4) Now produce the .dylib with just the symbols needed by the client
// RUN: %target-build-swift -parse-as-library -Xfrontend -enable-llvm-vfe -Xfrontend -internalize-at-link \
// RUN: %s -DLIBRARY -lto=llvm-full %lto_flags -module-name Library \
// RUN: -emit-library -o %t/libLibrary.dylib -runtime-compatibility-version none \
// RUN: -Xlinker -exported_symbols_list -Xlinker %t/used-symbols -Xlinker -dead_strip
// (5) Check list of symbols in library
// RUN: %llvm-nm --defined-only %t/libLibrary.dylib | %FileCheck %s --check-prefix=NM
// (6) Execution test
// RUN: %target-run %t/main | %FileCheck %s
// REQUIRES: executable_test
// FIXME(mracek): More work needed to get this to work on non-Apple platforms.
// REQUIRES: VENDOR=apple
// For LTO, the linker dlopen()'s the libLTO library, which is a scenario that
// ASan cannot work in ("Interceptors are not working, AddressSanitizer is
// loaded too late").
// REQUIRES: no_asan
// Remote test execution does not support dynamically loaded libraries.
// UNSUPPORTED: remote_run
#if LIBRARY
public class MyClass {
public init() {}
public func foo() { print("MyClass.foo") }
public func bar() { print("MyClass.bar") }
}
public class MyDerivedClass: MyClass {
override public func foo() { print("MyDerivedClass.foo") }
override public func bar() { print("MyDerivedClass.bar") }
}
// NM-NOT: $s7Library14MyDerivedClassC3baryyF
// NM: $s7Library14MyDerivedClassC3fooyyF
// NM-NOT: $s7Library7MyClassC3baryyF
// NM: $s7Library7MyClassC3fooyyF
#endif
#if CLIENT
import Library
@_cdecl("main")
func main() -> Int32 {
let o: MyClass = MyDerivedClass()
o.foo()
print("Done")
// CHECK: MyDerivedClass.foo
// CHECK-NEXT: Done
return 0
}
#endif
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