Restore a call to rememberInstruction which was accidentally dropped
in refactoring.

llvm-svn: 106398
diff --git a/llvm/lib/Analysis/ScalarEvolutionExpander.cpp b/llvm/lib/Analysis/ScalarEvolutionExpander.cpp
index c47b339..df562fa 100644
--- a/llvm/lib/Analysis/ScalarEvolutionExpander.cpp
+++ b/llvm/lib/Analysis/ScalarEvolutionExpander.cpp
@@ -46,6 +46,7 @@
             rememberInstruction(NewCI);
             return NewCI;
           }
+          rememberInstruction(CI);
           return CI;
         }