Index: mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
===================================================================
--- mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
+++ mlir/include/mlir/Interfaces/DataLayoutInterfaces.h
@@ -163,10 +163,8 @@
   /// Combined layout spec at the given scope.
   const DataLayoutSpecInterface originalLayout;
 
-#ifndef NDEBUG
   /// List of enclosing layout specs.
   SmallVector<DataLayoutSpecInterface, 2> layoutStack;
-#endif
 
   /// Asserts that the cache is still valid. Expensive in debug mode. No-op in
   /// release mode.