Index: include/llvm/IR/Value.h
===================================================================
--- include/llvm/IR/Value.h
+++ include/llvm/IR/Value.h
@@ -297,7 +297,9 @@
   void assertModuleIsMaterialized() const;
 
   bool use_empty() const {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return UseList == nullptr;
   }
 
@@ -308,11 +310,15 @@
     return const_use_iterator(UseList);
   }
   use_iterator use_begin() {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return materialized_use_begin();
   }
   const_use_iterator use_begin() const {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return materialized_use_begin();
   }
   use_iterator use_end() { return use_iterator(); }
@@ -324,16 +330,22 @@
     return make_range(materialized_use_begin(), use_end());
   }
   iterator_range<use_iterator> uses() {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return materialized_uses();
   }
   iterator_range<const_use_iterator> uses() const {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return materialized_uses();
   }
 
   bool user_empty() const {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return UseList == nullptr;
   }
 
@@ -344,21 +356,29 @@
     return const_user_iterator(UseList);
   }
   user_iterator user_begin() {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return materialized_user_begin();
   }
   const_user_iterator user_begin() const {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return materialized_user_begin();
   }
   user_iterator user_end() { return user_iterator(); }
   const_user_iterator user_end() const { return const_user_iterator(); }
   User *user_back() {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return *materialized_user_begin();
   }
   const User *user_back() const {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return *materialized_user_begin();
   }
   iterator_range<user_iterator> materialized_users() {
@@ -368,11 +388,15 @@
     return make_range(materialized_user_begin(), user_end());
   }
   iterator_range<user_iterator> users() {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return materialized_users();
   }
   iterator_range<const_user_iterator> users() const {
+#ifndef NDEBUG
     assertModuleIsMaterialized();
+#endif
     return materialized_users();
   }