Add Swift Benchmark Suite

benchmark/single-source/LinkedList.swift

@@ -0,0 +1,51 @@
+//===--- LinkedList.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
+//
+//===----------------------------------------------------------------------===//
+
+// This test checks performance of linked lists. It is based on LinkedList from
+// utils/benchmark, with modifications for performance measuring.
+import TestsUtils
+
+final class Node {
+  var next: Node?
+  var data: Int
+
+  init(n: Node?, d: Int) {
+    next = n
+    data = d
+  }
+}
+
+@inline(never)
+public func run_LinkedList(N: Int) {
+  let size = 100
+  var head = Node(n:nil, d:0)
+  for i in 0..<size {
+    head = Node(n:head, d:i)
+  }
+
+  var sum = 0
+  let ref_result = size*(size-1)/2
+  var ptr = head
+  for _ in 1...5000*N {
+    ptr = head
+    sum = 0
+    while let nxt = ptr.next {
+      sum += ptr.data
+      ptr = nxt
+    }
+    if sum != ref_result {
+      break
+    }
+  }
+  CheckResults(sum == ref_result,
+               "Incorrect results in LinkedList: \(sum) != \(ref_result)")
+}