diff --git a/llvm/lib/CodeGen/MachineRegionInfo.cpp b/llvm/lib/CodeGen/MachineRegionInfo.cpp
index c54a794..54b2eb4 100644
--- a/llvm/lib/CodeGen/MachineRegionInfo.cpp
+++ b/llvm/lib/CodeGen/MachineRegionInfo.cpp
@@ -111,9 +111,11 @@
   RI.print(OS);
 }
 
+#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
 void MachineRegionInfoPass::dump() const {
   RI.dump();
 }
+#endif
 
 char MachineRegionInfoPass::ID = 0;