Remove the code from IVUsers that attempted to handle

casted induction variables in cases where the cast
isn't foldable. It ended up being a pessimization in
many cases. This could be fixed, but it would require
a bunch of complicated code in IVUsers' clients. The
advantages of this approach aren't visible enough to
justify it at this time.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73706 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/IndVarSimplify/shrunk-constant.ll

@@ -1,4 +1,5 @@
-; RUN: llvm-as < %s | opt -iv-users -analyze -disable-output | grep store
+; RUN: llvm-as < %s | opt -scalar-evolution -analyze -disable-output \
+; RUN:  | grep {\\-->  (zext i4 {-7,+,-8}<loop> to i32)}
 
 define fastcc void @foo() nounwind {
 entry: