Rename the Data benchmark file to IterateData

This matches the actual name of the benchmark.

benchmark/single-source/IterateData.swift

@@ -0,0 +1,34 @@
+//===--- IterateData.swift ------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See http://swift.org/LICENSE.txt for license information
+// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+
+import TestsUtils
+import Foundation
+
+@inline(never)
+func generateData() -> Data {
+  var data = Data(count: 16 * 1024)
+  data.withUnsafeMutableBytes { (ptr: UnsafeMutablePointer<UInt8>) -> () in
+    for i in 0..<data.count {
+      ptr[i] = UInt8(i % 23)
+    }
+  }
+  return data
+}
+
+@inline(never)
+public func run_IterateData(_ N: Int) {
+  let data = generateData()
+
+  for _ in 0...10*N {
+    _ = data.reduce(0, +)
+  }
+}