Use abs64 in one more place.

llvm-svn: 71775
diff --git a/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp b/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp
index 80d34f6..2287f20 100644
--- a/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp
+++ b/llvm/lib/Transforms/Scalar/IndVarSimplify.cpp
@@ -697,7 +697,7 @@
 
   // If the iteration range can be handled by SIToFPInst then use it.
   APInt Max = APInt::getSignedMaxValue(32);
-  if (Max.getZExtValue() > static_cast<uint64_t>(abs(intEV - intIV)))
+  if (Max.getZExtValue() > static_cast<uint64_t>(abs64(intEV - intIV)))
     return true;
 
   return false;