[API Notes] Add tests for API notes that change types of Clang declarations.

Testing for rdar://problem/28943642.

Author: DougGregor

test/APINotes/Inputs/custom-frameworks/APINotesFrameworkTest.framework/Headers/APINotesFrameworkTest.apinotes

@@ -20,6 +20,18 @@ Classes:
       - Name: accessorsOnlyForClassExceptInVersion3
         PropertyKind:    Class
         SwiftImportAsAccessors: true
+      - Name: accessorsOnlyWithNewType
+        PropertyKind:    Instance
+        SwiftImportAsAccessors: true
+        Type: '__kindof Base * _Nonnull'
+  - Name: TypeChanges
+    Methods:
+      - Selector: 'methodWithA:'
+        MethodKind: Instance
+        ResultType: 'A * _Nonnull'
+        Parameters:
+          - Position: 0
+            Type: 'A * _Nullable'
 Functions:
   - Name: jumpToLocation
     SwiftName: 'jumpTo(x:y:z:)'

test/APINotes/Inputs/custom-frameworks/APINotesFrameworkTest.framework/Headers/APINotesFrameworkTest.h

@@ -3,5 +3,15 @@ void jumpToLocation(double x, double y, double z);
 void acceptDoublePointer(double* _Nonnull ptr) __attribute__((swift_name("accept(_:)")));
 
 #ifdef __OBJC__
+
+__attribute__((objc_root_class))
+@interface A
+@end
+
+__attribute__((objc_root_class))
+@interface TypeChanges
+-(nonnull id)methodWithA:(nonnull id)a;
+@end
+
 #import <APINotesFrameworkTest/Properties.h>
 #endif

test/APINotes/Inputs/custom-frameworks/APINotesFrameworkTest.framework/Headers/Properties.h

@@ -23,4 +23,8 @@ __attribute__((objc_root_class))
 @property (nonatomic, readwrite, retain, class) id accessorsOnlyForClass;
 @end
 
+@interface TestProperties (Retyped)
+@property (nonatomic, readwrite, retain) id accessorsOnlyWithNewType;
+@end
+
 #pragma clang assume_nonnull end

test/APINotes/properties.swift

@@ -40,3 +40,8 @@
 // CHECK-BOTH-DAG: class func accessorsOnlyForClass() -> Any
 // CHECK-BOTH-DAG: class func setAccessorsOnlyForClass(_ accessorsOnlyForClass: Any)
 // CHECK-BOTH: {{^}$}}
+
+// CHECK-BOTH-DAG: func accessorsOnlyWithNewType() -> Base
+// CHECK-BOTH-DAG: func setAccessorsOnlyWithNewType(_ accessorsOnlyWithNewType: Base)
+
+// CHECK-BOTH: {{^}$}}

test/APINotes/type_changes.swift

@@ -0,0 +1,8 @@
+// RUN: %target-parse-verify-swift -I %S/Inputs/custom-modules -F %S/Inputs/custom-frameworks
+import APINotesTest
+import APINotesFrameworkTest
+
+func testChangedTypes(tc: TypeChanges, a: A, i: Int) {
+  _ = tc.method(with: i) // expected-error{{cannot convert value of type 'Int' to expected argument type 'A?'}}
+  let _: Int = tc.method(with: a) // expected-error{{cannot convert value of type 'A' to specified type 'Int'}}
+}