Revert "Add tests for weak-linked class stubs"

lib/PrintAsObjC/PrintAsObjC.cpp

@@ -322,13 +322,6 @@ class ObjCPrinter : private DeclVisitor<ObjCPrinter>,
   void visitClassDecl(ClassDecl *CD) {
     printDocumentationComment(CD);
 
-    // This is just for testing, so we check explicitly for the attribute instead
-    // of asking if the class is weak imported. If the class has availablility,
-    // we'll print a SWIFT_AVAIALBLE() which implies __attribute__((weak_imported))
-    // already.
-    if (CD->getAttrs().hasAttribute<WeakLinkedAttr>())
-      os << "SWIFT_WEAK_IMPORT\n";
-
     bool hasResilientAncestry =
       CD->checkAncestry().contains(AncestryFlags::ResilientOther);
     if (hasResilientAncestry) {
@@ -2724,9 +2717,6 @@ class ModuleWriter {
            "#if !defined(SWIFT_AVAILABILITY)\n"
            "# define SWIFT_AVAILABILITY(plat, ...) __attribute__((availability(plat, __VA_ARGS__)))\n"
            "#endif\n"
-           "#if !defined(SWIFT_WEAK_IMPORT)\n"
-           "# define SWIFT_WEAK_IMPORT __attribute__((weak_import))\n"
-           "#endif\n"
            "#if !defined(SWIFT_DEPRECATED)\n"
            "# define SWIFT_DEPRECATED __attribute__((deprecated))\n"
            "#endif\n"

test/PrintAsObjC/classes.swift

@@ -805,9 +805,3 @@ public class NonObjCClass { }
   @objc func referenceSingleGenericClass(_: SingleImportedObjCGeneric<AnyObject>?) {}
 }
 // CHECK: @end
-
-// CHECK: SWIFT_WEAK_IMPORT
-// CHECK-NEXT: SWIFT_CLASS("_TtC7classes17WeakImportedClass")
-// CHECK-NEXT: @interface WeakImportedClass
-// CHECK-NEXT: @end
-@_weakLinked @objc class WeakImportedClass {}

validation-test/Runtime/class_stubs.m

@@ -5,13 +5,15 @@
 // RUN: %target-build-swift -emit-library -emit-module -o %t/libfirst.dylib -emit-objc-header-path %t/first.h %S/Inputs/class-stubs-from-objc/first.swift -Xlinker -install_name -Xlinker @executable_path/libfirst.dylib -enable-library-evolution
 // RUN: %target-build-swift -emit-library -o %t/libsecond.dylib -emit-objc-header-path %t/second.h -I %t %S/Inputs/class-stubs-from-objc/second.swift -Xlinker -install_name -Xlinker @executable_path/libsecond.dylib -lfirst -L %t -Xfrontend -enable-resilient-objc-class-stubs
 // RUN: cp %S/Inputs/class-stubs-from-objc/module.map %t/
-// RUN: xcrun %clang %s -I %t -L %t -fmodules -fobjc-arc -o %t/main -lfirst -lsecond -Wl,-U,_objc_loadClassref
+// RUN: xcrun %clang %s -I %t -L %t -fmodules -fobjc-arc -o %t/main -lfirst -lsecond
 // RUN: %target-codesign %t/main %t/libfirst.dylib %t/libsecond.dylib
-// RUN: %target-run %t/main %t/libfirst.dylib %t/libsecond.dylib
+// RUN: %target-run %t/main %t/libfirst.dylib %t/libsecond.dylib | %FileCheck %s
 
 // REQUIRES: executable_test
 // REQUIRES: objc_interop
 
+// XFAIL: *
+
 #import <dlfcn.h>
 #import <stdio.h>
 #import "second.h"
@@ -37,17 +39,9 @@ int main(int argc, const char * const argv[]) {
 
   DerivedClass *obj = [[DerivedClass alloc] init];
 
-  {
-    long result = [obj instanceMethod];
-    printf("[obj instanceMethod] == %ld\n", result);
-    if (result != 43)
-      exit(EXIT_FAILURE);
-  }
+  // CHECK: Result is 43
+  printf("Result is %ld\n", [obj instanceMethod]); 
 
-  {
-    long result = [DerivedClass classMethod];
-    printf("[obj classMethod] == %ld\n", result);
-    if (result != 31338)
-      exit(EXIT_FAILURE);
-  }
+  // CHECK: Result is 31338
+  printf("Result is %ld\n", [DerivedClass classMethod]); 
 }