[PrintAsObjC] Silence -Wnullability for the generated declarations.

lib/PrintAsObjC/PrintAsObjC.cpp

@@ -2713,6 +2713,7 @@ class ModuleWriter {
         "# pragma clang diagnostic ignored \"-Wpragma-clang-attribute\"\n"
         "#endif\n"
         "#pragma clang diagnostic ignored \"-Wunknown-pragmas\"\n"
+        "#pragma clang diagnostic ignored \"-Wnullability\"\n"
         "\n"
         "SWIFT_MODULE_NAMESPACE_PUSH(\"" << M.getNameStr() << "\")\n"
       << os.str()

test/PrintAsObjC/Inputs/custom-modules/VersionedFMWK.apinotes

@@ -0,0 +1,24 @@
+Name: VersionedFMWK
+SwiftVersions:
+  - Version: 3.0
+    Classes:
+      - Name: InnerClass
+        SwiftName: InnerClass
+      - Name: NullabilityBase
+        Methods:
+          - Selector: 'initFormerlyFailableValue:'
+            MethodKind: Instance
+            NullabilityOfRet: O
+          - Selector: 'processNowNullableArgument:'
+            MethodKind: Instance
+            Parameters:
+              - Position: 0
+                Nullability: N
+    Tags:
+      - Name: InnerStruct
+        SwiftName: InnerStruct
+    Typedefs:
+      - Name: InnerAlias
+        SwiftName: InnerAlias
+      - Name: InnerAnonStruct
+        SwiftName: InnerAnonStruct

test/PrintAsObjC/Inputs/custom-modules/NestedClass.h → test/PrintAsObjC/Inputs/custom-modules/VersionedFMWK.h

@@ -19,3 +19,8 @@ typedef struct {
 
 typedef int InnerAlias __attribute__((swift_name("Outer.InnerA")));
 
+
+@interface NullabilityBase : NSObject
+- (nonnull instancetype)initFormerlyFailableValue:(NSInteger)value __attribute__((objc_designated_initializer));
+- (void)processNowNullableArgument:(nullable NSObject *)object;
+@end

test/PrintAsObjC/Inputs/custom-modules/module.map

@@ -38,7 +38,7 @@ module CompatibilityAlias {
   export *
 }
 
-module NestedClass {
-  header "NestedClass.h"
+module VersionedFMWK {
+  header "VersionedFMWK.h"
   export *
 }

test/PrintAsObjC/versioned.swift

@@ -14,9 +14,16 @@
 // RUN: %target-swift-frontend(mock-sdk: -sdk %S/../Inputs/clang-importer-sdk -I %t) -parse-as-library %t/versioned.swiftmodule -typecheck -I %S/Inputs/custom-modules -emit-objc-header-path %t/versioned.h -import-objc-header %S/../Inputs/empty.h -disable-objc-attr-requires-foundation-module -swift-version 3
 // RUN: %FileCheck %s < %t/versioned.h
 // RUN: %check-in-clang -I %S/Inputs/custom-modules/ %t/versioned.h
-// RUN: %check-in-clang -I %S/Inputs/custom-modules/ -fno-modules -Qunused-arguments %t/versioned.h -include Foundation.h -include NestedClass.h
+// RUN: %check-in-clang -I %S/Inputs/custom-modules/ -fno-modules -Qunused-arguments %t/versioned.h -include Foundation.h -include VersionedFMWK.h
 
-import NestedClass
+import VersionedFMWK
+
+// CHECK-LABEL: @interface NullabilitySub
+@objc class NullabilitySub: NullabilityBase {
+  // CHECK-NEXT: - (void)processNowNullableArgument:(NSObject * _Nonnull)object;
+  override func processNowNullableArgument(_ object: NSObject) {}
+  // CHECK-NEXT: - (nullable instancetype)initFormerlyFailableValue:(NSInteger)value OBJC_DESIGNATED_INITIALIZER;
+} // CHECK-NEXT: @end
 
 // CHECK-LABEL: @interface UsesNestedClass
 @objc class UsesNestedClass : NSObject {