fix typo

llvm-svn: 21693
diff --git a/llvm/lib/Target/Alpha/AlphaISelPattern.cpp b/llvm/lib/Target/Alpha/AlphaISelPattern.cpp
index aa4ed3b..3fcba64 100644
--- a/llvm/lib/Target/Alpha/AlphaISelPattern.cpp
+++ b/llvm/lib/Target/Alpha/AlphaISelPattern.cpp
@@ -82,7 +82,7 @@
       if (!EnableAlphaCT) {
         setOperationAction(ISD::CTPOP    , MVT::i64  , Expand);
         setOperationAction(ISD::CTTZ     , MVT::i64  , Expand);
-        setOperationAction(ISD::CTTZ     , MVT::i64  , Expand);
+        setOperationAction(ISD::CTLZ     , MVT::i64  , Expand);
       }
 
       //If this didn't legalize into a div....