diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 0f3502e9bea3ebd99db0958bd55fdaff0db46b7e..9b469452a373ed25d1b9916c462f8560107ad765 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -98,7 +98,7 @@ llvm::DICompileUnit CGDebugInfo::getOrCreateCompileUnit(SourceLocation Loc) {
 
     // See if this compile unit has been used before for this valid location.
     llvm::DICompileUnit &Unit = CompileUnitCache[FID];
-    if (!Unit.isNull()) return Unit;
+    if (Unit.Verify()) return Unit;
   }
 
   // Get absolute path name.
@@ -698,7 +698,7 @@ CollectCXXBases(const CXXRecordDecl *RD, llvm::DICompileUnit Unit,
 
 /// getOrCreateVTablePtrType - Return debug info descriptor for vtable.
 llvm::DIType CGDebugInfo::getOrCreateVTablePtrType(llvm::DICompileUnit Unit) {
-  if (!VTablePtrType.isNull())
+  if (VTablePtrType.isValid())
     return VTablePtrType;
 
   ASTContext &Context = CGM.getContext();
@@ -1306,8 +1306,8 @@ void CGDebugInfo::EmitFunctionStart(GlobalDecl GD, QualType FnType,
     llvm::DenseMap<const FunctionDecl *, llvm::WeakVH>::iterator
       FI = SPCache.find(FD);
     if (FI != SPCache.end()) {
-      llvm::DISubprogram SP(dyn_cast_or_null<llvm::MDNode>(FI->second));
-      if (!SP.isNull() && SP.isSubprogram() && SP.isDefinition()) {
+      llvm::DIDescriptor SP(dyn_cast_or_null<llvm::MDNode>(FI->second));
+      if (SP.isSubprogram() && llvm::DISubprogram(SP.getNode()).isDefinition()) {
         RegionStack.push_back(SP.getNode());
         RegionMap[D] = llvm::WeakVH(SP.getNode());
         return;