diff --git a/llvm/utils/TableGen/GlobalISelCombinerMatchTableEmitter.cpp b/llvm/utils/TableGen/GlobalISelCombinerMatchTableEmitter.cpp
--- a/llvm/utils/TableGen/GlobalISelCombinerMatchTableEmitter.cpp
+++ b/llvm/utils/TableGen/GlobalISelCombinerMatchTableEmitter.cpp
@@ -491,7 +491,9 @@
   void dump() const { print(dbgs()); }
 
   /// Debug-only verification of invariants.
+#ifndef NDEBUG
   void verify() const;
+#endif
 
 private:
   void PrintError(Twine Msg) const { ::PrintError(RuleDef.getLoc(), Msg); }
@@ -669,6 +671,7 @@
   OS << ")\n";
 }
 
+#ifndef NDEBUG
 void CombineRuleBuilder::verify() const {
   const auto VerifyPats = [&](const PatternMap &Pats) {
     for (const auto &[Name, Pat] : Pats) {
@@ -706,6 +709,7 @@
     }
   }
 }
+#endif
 
 bool CombineRuleBuilder::addFeaturePredicates(RuleMatcher &M) {
   if (!RuleDef.getValue("Predicates"))