Mark some functions as used which are used within debug-only code. This
silences Clang's -Wunused-function when building in release mode.

llvm-svn: 129709
diff --git a/llvm/lib/Transforms/Instrumentation/PathProfiling.cpp b/llvm/lib/Transforms/Instrumentation/PathProfiling.cpp
index 3def2af..6bd4478 100644
--- a/llvm/lib/Transforms/Instrumentation/PathProfiling.cpp
+++ b/llvm/lib/Transforms/Instrumentation/PathProfiling.cpp
@@ -389,6 +389,9 @@
 
   // BallLarusEdge << operator overloading
   raw_ostream& operator<<(raw_ostream& os,
+                          const BLInstrumentationEdge& edge)
+      LLVM_ATTRIBUTE_USED;
+  raw_ostream& operator<<(raw_ostream& os,
                           const BLInstrumentationEdge& edge) {
     os << "[" << edge.getSource()->getName() << " -> "
        << edge.getTarget()->getName() << "] init: "