Index: include/llvm/Support/DebugCounter.h
===================================================================
--- include/llvm/Support/DebugCounter.h
+++ include/llvm/Support/DebugCounter.h
@@ -121,8 +121,12 @@
     Us.Counters[ID] = Val;
   }
 
+#ifndef NDEBUG
   // Dump or print the current counter set.
-  LLVM_DUMP_METHOD void dump() { print(dbgs()); }
+  LLVM_DUMP_METHOD void dump() {
+    print(dbgs());
+  }
+#endif
 
   void print(raw_ostream &OS);
 
Index: include/llvm/Transforms/Scalar/GVNExpression.h
===================================================================
--- include/llvm/Transforms/Scalar/GVNExpression.h
+++ include/llvm/Transforms/Scalar/GVNExpression.h
@@ -121,10 +121,12 @@
     OS << "}";
   }
 
+#ifndef NDEBUG
   LLVM_DUMP_METHOD void dump() const {
     print(dbgs());
     dbgs() << "\n";
   }
+#endif
 };
 
 inline raw_ostream &operator<<(raw_ostream &OS, const Expression &E) {