Update for LLVM API change.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@75446 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGObjC.cpp b/lib/CodeGen/CGObjC.cpp
index 5d37841..4777bc7 100644
--- a/lib/CodeGen/CGObjC.cpp
+++ b/lib/CodeGen/CGObjC.cpp
@@ -488,7 +488,7 @@
   llvm::BasicBlock *SetStartMutations = createBasicBlock("setstartmutations");
   
   llvm::Value *Limit = Builder.CreateLoad(LimitPtr);
-  llvm::Value *Zero = llvm::Constant::getNullValue(UnsignedLongLTy);
+  llvm::Value *Zero = getLLVMContext().getNullValue(UnsignedLongLTy);
 
   llvm::Value *IsZero = Builder.CreateICmpEQ(Limit, Zero, "iszero");
   Builder.CreateCondBr(IsZero, NoElements, SetStartMutations);
@@ -618,7 +618,7 @@
     LValue LV = EmitLValue(cast<Expr>(S.getElement()));
     
     // Set the value to null.
-    Builder.CreateStore(llvm::Constant::getNullValue(ConvertType(ElementTy)),
+    Builder.CreateStore(getLLVMContext().getNullValue(ConvertType(ElementTy)),
                         LV.getAddress());
   }