1a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Copyright 2008 the V8 project authors. All rights reserved. 2a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Redistribution and use in source and binary forms, with or without 3a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// modification, are permitted provided that the following conditions are 4a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// met: 5a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 6a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions of source code must retain the above copyright 7a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// notice, this list of conditions and the following disclaimer. 8a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions in binary form must reproduce the above 9a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// copyright notice, this list of conditions and the following 10a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// disclaimer in the documentation and/or other materials provided 11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// with the distribution. 12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Neither the name of Google Inc. nor the names of its 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// contributors may be used to endorse or promote products derived 14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// from this software without specific prior written permission. 15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 16a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 28a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Flags: --gc-greedy 29a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 30a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockfunction IterativeFib(n) { 31a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block var f0 = 0, f1 = 1; 32a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block for (; n > 0; --n) { 33a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block var f2 = f0 + f1; 34a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block f0 = f1; f1 = f2; 35a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 36a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return f0; 37a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 38a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 39a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockfunction RecursiveFib(n) { 40a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (n <= 1) return n; 41a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return RecursiveFib(n - 1) + RecursiveFib(n - 2); 42a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 43a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 44a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockfunction Check(n, expected) { 45a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block var i = IterativeFib(n); 46a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block var r = RecursiveFib(n); 47a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(i, expected); 48a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assertEquals(r, expected); 49a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 50a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 51a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockCheck(0, 0); 52a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockCheck(1, 1); 53a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockCheck(2, 1); 54a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockCheck(3, 1 + 1); 55a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockCheck(4, 2 + 1); 56a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockCheck(5, 3 + 2); 57a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockCheck(10, 55); 58a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockCheck(15, 610); 59a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockCheck(20, 6765); 60a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockassertEquals(IterativeFib(75), 2111485077978050); 61