diff --git a/llvm/docs/GlobalISel/GenericOpcode.rst b/llvm/docs/GlobalISel/GenericOpcode.rst
--- a/llvm/docs/GlobalISel/GenericOpcode.rst
+++ b/llvm/docs/GlobalISel/GenericOpcode.rst
@@ -403,8 +403,8 @@
 
 .. code-block:: none
 
-  %2:_(s33) = G_CTLZ_ZERO_UNDEF %1
-  %2:_(s33) = G_CTTZ_ZERO_UNDEF %1
+  %2:_(s33) = G_CTLZ %1
+  %2:_(s33) = G_CTTZ %1
   %2:_(s33) = G_CTPOP %1
 
 G_CTLZ_ZERO_UNDEF, G_CTTZ_ZERO_UNDEF