Small fix for cost analysis of ptrtoint.

This seems to be a "copy-paste error" introducecd in r156140.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176863 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/TargetTransformInfo.cpp b/lib/Analysis/TargetTransformInfo.cpp
index 72421a0..976cd87 100644
--- a/lib/Analysis/TargetTransformInfo.cpp
+++ b/lib/Analysis/TargetTransformInfo.cpp
@@ -263,8 +263,8 @@
     case Instruction::PtrToInt:
       // A ptrtoint cast is free so long as the result is large enough to store
       // the pointer, and a legal integer type.
-      if (DL && DL->isLegalInteger(OpTy->getScalarSizeInBits()) &&
-          OpTy->getScalarSizeInBits() >= DL->getPointerSizeInBits())
+      if (DL && DL->isLegalInteger(Ty->getScalarSizeInBits()) &&
+          Ty->getScalarSizeInBits() >= DL->getPointerSizeInBits())
         return TCC_Free;
 
       // Otherwise it's not a no-op.