Add plumbing for the cleanup stack.

llvm-svn: 64043
diff --git a/clang/lib/CodeGen/CodeGenFunction.cpp b/clang/lib/CodeGen/CodeGenFunction.cpp
index f5a802f..4ba4d60 100644
--- a/clang/lib/CodeGen/CodeGenFunction.cpp
+++ b/clang/lib/CodeGen/CodeGenFunction.cpp
@@ -512,3 +512,12 @@
   }
   return EmitLValue(E).getAddress();
 }
+
+llvm::BasicBlock *CodeGenFunction::CreateCleanupBlock()
+{
+  llvm::BasicBlock *CleanupBlock = createBasicBlock("cleanup");
+  
+  CleanupEntries.push_back(CleanupEntry(CleanupBlock));
+  
+  return CleanupBlock;  
+}