Hack forEach to use HasFastPackedElements

test.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --allow-natives-syntax
 
-function a() {
-  var sum = 0;
-  for (var i = 0; i < 500; ++i) {
-    sum = (i + sum) | 0;
+load('benchmarks/base.js');
+
+
+function createArray() {
+  var array = [];
+  for (var i = 0; i < 100; i++) {
+    array[i] = i;
   }
-  return sum;
+  return array;
 }
 
-function b() {
-  var sum = 0;
-  for (var i = -500; i < 0; ++i) {
-    sum = (i + sum) | 0;
+
+function createArrayWithHoles() {
+  var array = [];
+  for (var i = 0; i < 100; i += 2) {
+    array[i] = i;
   }
-  return sum;
+  return array;
 }
 
-function c() {
-  var sum = 0;
-  for (var i = 0; i < 500; ++i) {
-    sum += (i + -0x7fffffff) | 0;
-  }
-  return sum;
+
+var array = createArray();
+var arrayWithHoles = createArrayWithHoles();
+
+
+function f(value, index) {
+  if (value !== index)
+    throw new Error();
 }
 
-function d() {
-  var sum = 0;
-  for (var i = -501; i < 0; ++i) {
-    sum += (i + 501) | 0;
-  }
-  return sum;
+
+function ForEach() {
+  array.forEach(f);
 }
 
-a();
-a();
-%OptimizeFunctionOnNextCall(a);
-assertEquals(124750, a());
-assertEquals(124750, a());
 
-b();
-b();
-%OptimizeFunctionOnNextCall(b);
-assertEquals(-125250, b());
-assertEquals(-125250, b());
+function ForEach2() {
+  array.forEach2(f);
+}
 
-c();
-c();
-%OptimizeFunctionOnNextCall(c);
-assertEquals(-1073741698750, c());
-assertEquals(-1073741698750, c());
 
-d();
-d();
-%OptimizeFunctionOnNextCall(d);
-assertEquals(125250, d());
-assertEquals(125250, d());
+function ForEach3() {
+  array.forEach3(f);
+}
+
+
+function ForEachWithHoles() {
+  arrayWithHoles.forEach(f);
+}
+
+
+function ForEach2WithHoles() {
+  arrayWithHoles.forEach2(f);
+}
+
+
+function ForEach3WithHoles() {
+  arrayWithHoles.forEach3(f);
+}
+
+
+[
+  ForEach,
+  ForEach2,
+  ForEach3,
+  ForEachWithHoles,
+  ForEach2WithHoles,
+  ForEach3WithHoles
+].forEach(function(f) {
+  var name = f.name;
+  new BenchmarkSuite(name, 1e4, [
+    new Benchmark(name, f, f)
+  ]);
+});
+
+
+BenchmarkSuite.RunSuites({
+  NotifyResult: function(name, result) {
+    print(name + ': ' + result);
+  }
+});