[CodeGen] Fix a warning

This patch fixes:

  llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp:1220:13: error:
  unused function 'locStr' [-Werror,-Wunused-function]

diff --git a/llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp b/llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp
index 2049ada..f553da4 100644 (file)
--- a/llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp
+++ b/llvm/lib/CodeGen/AssignmentTrackingAnalysis.cpp
@@ -1217,6 +1217,7 @@ bool AssignmentTrackingLowering::hasVarWithAssignment(VariableID Var,
   return true;
 }
 
+#ifndef NDEBUG
 const char *locStr(AssignmentTrackingLowering::LocKind Loc) {
   using LocKind = AssignmentTrackingLowering::LocKind;
   switch (Loc) {
@@ -1229,6 +1230,7 @@ const char *locStr(AssignmentTrackingLowering::LocKind Loc) {
   };
   llvm_unreachable("unknown LocKind");
 }
+#endif
 
 void AssignmentTrackingLowering::emitDbgValue(
     AssignmentTrackingLowering::LocKind Kind,