Change CodeGenModule to only create ObjC runtime for ObjC files
 - Changed CodeGenModule::getObjCRuntime to return reference.
 - Added CodeGenModule::hasObjCRuntime predicate.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@54645 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprConstant.cpp b/lib/CodeGen/CGExprConstant.cpp
index b1f7c51..5865f21 100644
--- a/lib/CodeGen/CGExprConstant.cpp
+++ b/lib/CodeGen/CGExprConstant.cpp
@@ -61,7 +61,7 @@
     return llvm::ConstantInt::get(ConvertType(E->getType()), E->getValue());
   }
   llvm::Constant *VisitObjCStringLiteral(const ObjCStringLiteral *E) {
-    return CGM.getObjCRuntime()->GenerateConstantString(
+    return CGM.getObjCRuntime().GenerateConstantString(
         E->getString()->getStrData(), E->getString()->getByteLength());
   }