Fix a crash during meta-data generation of objc2's nonfragile abi.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@67402 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/CGObjCMac.cpp

@@ -4193,7 +4193,10 @@ void CGObjCNonFragileABIMac::GenerateClass(const ObjCImplementationDecl *ID) {
       ID->getClassInterface()->getSuperClass()->getNameAsString();
     SuperClassGV = GetClassGlobal(ObjCClassName + RootClassName);
   }
-  
+  // FIXME: Gross
+  ObjCInterfaceDecl *Interface =
+    const_cast<ObjCInterfaceDecl*>(ID->getClassInterface()); 
+  CGM.getTypes().ConvertType(CGM.getContext().buildObjCInterfaceType(Interface));
   InstanceStart = InstanceSize = 0;
   if (ObjCInterfaceDecl *OID = 
       const_cast<ObjCInterfaceDecl*>(ID->getClassInterface())) {

test/CodeGenObjC/forward-class-impl-metadata.m

@@ -0,0 +1,24 @@
+// RUN: clang -triple x86_64-unknown-unknown -emit-llvm -o %t %s
+
+@interface BASE  {
+@private
+    void* _reserved;
+}
+@end
+
+@class PVR;
+
+@interface PVRHandldler 
+{
+          PVR *_imageBrowser;
+}
+@end
+
+@implementation PVRHandldler @end
+
+
+@interface PVR   : BASE
+@end
+
+@implementation PVR
+@end