Fix warning about non-virtual destructor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80429 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Instrumentation/MaximumSpanningTree.cpp

@@ -102,6 +102,9 @@ MaximumSpanningTree::MaximumSpanningTree(Function *F, ProfileInfo *PI,
   std::stable_sort(MST.begin(),MST.end());
 }
 
+MaximumSpanningTree::~MaximumSpanningTree() {
+}
+
 MaximumSpanningTree::MaxSpanTree::iterator MaximumSpanningTree::begin() {
   return MST.begin();
 }

lib/Transforms/Instrumentation/MaximumSpanningTree.h

@@ -38,6 +38,7 @@ namespace llvm {
     // easier for the OptimalEdgeProfileInstrumentation to use this MST to do
     // an optimal profiling.
     MaximumSpanningTree(Function *F, ProfileInfo *PI, bool invert);
+    virtual ~MaximumSpanningTree();
 
     virtual MaxSpanTree::iterator begin();
     virtual MaxSpanTree::iterator end();