[Test] Add SixSpeed tests for spread literals.

This will give us a baseline for upcoming perf work.

BUG=v8:5940

Review-Url: https://codereview.chromium.org/2680763002
Cr-Commit-Position: refs/heads/master@{#42987}

test/js-perf-test/SixSpeed.json

@@ -104,6 +104,29 @@
           "test_flags": ["super_spread/es6"]
         }
       ]
+    },
+    {
+      "name": "SpreadLiteral",
+      "path": ["SixSpeed"],
+      "flags": ["--future"],
+      "results_regexp": "^%s\\(Score\\): (.+)$",
+      "tests": [
+        {
+          "name": "ES5",
+          "main": "run.js",
+          "test_flags": ["spread_literal/es5"]
+        },
+        {
+          "name": "Babel",
+          "main": "run.js",
+          "test_flags": ["super_spread/babel"]
+        },
+        {
+          "name": "ES6",
+          "main": "run.js",
+          "test_flags": ["spread_literal/es6"]
+        }
+      ]
     }
   ]
 }

test/js-perf-test/SixSpeed/spread_literal/babel.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This benchmark is based on the six-speed benchmark build output.
+// Copyright 2014 Kevin Decker <https://github.com/kpdecker/six-speed/>
+
+new BenchmarkSuite('Babel', [1000], [
+  new Benchmark('Babel', false, false, 0, Babel),
+]);
+
+function Babel() {
+  return [1].concat([1, 2, 3]);
+}

test/js-perf-test/SixSpeed/spread_literal/es5.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This benchmark is based on the six-speed benchmark build output.
+// Copyright 2014 Kevin Decker <https://github.com/kpdecker/six-speed/>
+
+new BenchmarkSuite('ES5', [1000], [
+  new Benchmark('ES5', false, false, 0, ES5),
+]);
+
+function ES5() {
+  var ret = [1];
+  ret.push(1, 2, 3);
+  return ret;
+}

test/js-perf-test/SixSpeed/spread_literal/es6.js

+// Copyright 2017 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This benchmark is based on the six-speed benchmark build output.
+// Copyright 2014 Kevin Decker <https://github.com/kpdecker/six-speed/>
+
+new BenchmarkSuite('ES6', [1000], [
+  new Benchmark('ES6', false, false, 0, ES6),
+]);
+
+function ES6() {
+  return [1, ... [1, 2, 3]];
+}