Move more code back to 2.5 APIs.

llvm-svn: 77635
diff --git a/llvm/lib/Analysis/DebugInfo.cpp b/llvm/lib/Analysis/DebugInfo.cpp
index 635b6b9..1899623 100644
--- a/llvm/lib/Analysis/DebugInfo.cpp
+++ b/llvm/lib/Analysis/DebugInfo.cpp
@@ -497,7 +497,7 @@
   
   // If empty string then use a i8* null instead.
   if (String.empty())
-    return Slot = VMContext.getConstantPointerNull(DestTy);
+    return Slot = ConstantPointerNull::get(DestTy);
 
   // Construct string as an llvm constant.
   Constant *ConstStr = ConstantArray::get(String);