shutdown at end of run


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33697 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/opt/opt.cpp b/tools/opt/opt.cpp
index d5d6f77..44b35d3 100644
--- a/tools/opt/opt.cpp
+++ b/tools/opt/opt.cpp
@@ -263,5 +263,6 @@
   } catch (...) {
     cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
   }
+  llvm_shutdown();
   return 1;
 }