Use type helper functions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190113 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/CodeGenPrepare.cpp b/lib/Transforms/Scalar/CodeGenPrepare.cpp
index 67bf1bb..c1a83bf 100644
--- a/lib/Transforms/Scalar/CodeGenPrepare.cpp
+++ b/lib/Transforms/Scalar/CodeGenPrepare.cpp
@@ -1418,8 +1418,7 @@
     Value *Address = User->getOperand(OpNo);
     if (!Address->getType()->isPointerTy())
       return false;
-    Type *AddressAccessTy =
-      cast<PointerType>(Address->getType())->getElementType();
+    Type *AddressAccessTy = Address->getType()->getPointerElementType();
 
     // Do a match against the root of this address, ignoring profitability. This
     // will tell us if the addressing mode for the memory operation will