Index: lib/Transforms/IPO/DeadArgumentElimination.cpp
===================================================================
--- lib/Transforms/IPO/DeadArgumentElimination.cpp
+++ lib/Transforms/IPO/DeadArgumentElimination.cpp
@@ -957,6 +957,9 @@
   // function empty.
   NF->getBasicBlockList().splice(NF->begin(), F->getBasicBlockList());
 
+  // Patch the pointer to LLVM function in debug info descriptor.
+  NF->setSubprogram(F->getSubprogram());
+
   // Loop over the argument list, transferring uses of the old arguments over to
   // the new arguments, also transferring over the names as well.
   i = 0;
@@ -1017,9 +1020,6 @@
         BB.getInstList().erase(RI);
       }
 
-  // Patch the pointer to LLVM function in debug info descriptor.
-  NF->setSubprogram(F->getSubprogram());
-
   // Now that the old function is dead, delete it.
   F->eraseFromParent();