Change UsedArray to be a vector of WeakVH to fix a dangling pointer problem that occurs when
attribute(used) and asm renaming are used together.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68155 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CodeGenModule.h b/lib/CodeGen/CodeGenModule.h
index dbfbf02..01b8d02 100644
--- a/lib/CodeGen/CodeGenModule.h
+++ b/lib/CodeGen/CodeGenModule.h
@@ -21,6 +21,7 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringSet.h"
+#include "llvm/Support/ValueHandle.h"
 #include <list>
 
 namespace llvm {
@@ -119,7 +120,7 @@
   /// present in the object file; bitcast to i8*. This is used for
   /// forcing visibility of symbols which may otherwise be optimized
   /// out.
-  std::vector<llvm::Constant*> LLVMUsed;
+  std::vector<llvm::WeakVH> LLVMUsed;
 
   /// GlobalCtors - Store the list of global constructors and their respective
   /// priorities to be emitted when the translation unit is complete.