[js-perf-test] Benchmark BigIntAdd without turbofan

Bug: v8:9407
Change-Id: Ie7993fcacc3e518da7b4af4c4ab20d8e4c47870c
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3905197Reviewed-by: Nico Hartmann <nicohartmann@chromium.org>
Commit-Queue: Qifan Pan <panq@google.com>
Cr-Commit-Position: refs/heads/main@{#83364}

test/js-perf-test/BigInt/add-no-opt.js

+// Copyright 2022 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.
+
+"use strict";
+
+d8.file.execute('bigint-util.js');
+
+let random_bigints = [];
+
+// This dummy ensures that the feedback for benchmark.run() in the Measure
+// function from base.js is not monomorphic, thereby preventing the benchmarks
+// below from being inlined. This ensures consistent behavior and comparable
+// results.
+new BenchmarkSuite('Prevent-Inline-Dummy', [10000], [
+  new Benchmark('Prevent-Inline-Dummy', true, false, 0, () => {})
+]);
+
+
+new BenchmarkSuite(`Add-Small`, [1000], [
+  new Benchmark(`Add-Small`, true, false, 0, TestAdd,
+    () => SetUpRandomBigInts(32))
+]);
+
+
+new BenchmarkSuite(`Add-Large`, [1000], [
+  new Benchmark(`Add-Large`, true, false, 0, TestAdd,
+    () => SetUpRandomBigInts(8192))
+]);
+
+
+new BenchmarkSuite(`Add-LargerThanSmall`, [1000], [
+  new Benchmark(`Add-LargerThanSmall`, true, false, 0, TestAdd,
+    () => SetUpRandomBigInts(68))
+]);
+
+
+new BenchmarkSuite(`Add-Random`, [1000], [
+  new Benchmark(`Add-Random`, true, false, 0, TestAdd,
+    SetUpTestAddRandom)
+]);
+
+
+function SetUpRandomBigInts(bits) {
+  random_bigints = [];
+  // RandomBigIntWithBits needs multiples of 4 bits.
+  bits = Math.floor(bits / 4) * 4;
+  for (let i = 0; i < TEST_ITERATIONS; ++i) {
+    const bigint = RandomBigIntWithBits(bits);
+    random_bigints.push(Math.random() < 0.5 ? -bigint : bigint);
+  }
+}
+
+
+function SetUpTestAddRandom() {
+  random_bigints = [];
+  // RandomBigIntWithBits needs multiples of 4 bits.
+  const max_in_4bits = RANDOM_BIGINTS_MAX_BITS / 4;
+  for (let i = 0; i < TEST_ITERATIONS; ++i) {
+    const bits = Math.floor(Math.random() * max_in_4bits) * 4;
+    const bigint = RandomBigIntWithBits(bits);
+    random_bigints.push(Math.random() < 0.5 ? -bigint : bigint);
+  }
+}
+
+
+function TestAdd() {
+  let sum = 0n;
+
+  for (let i = 0; i < TEST_ITERATIONS - 1; ++i) {
+    sum += random_bigints[i] + random_bigints[i + 1];
+  }
+
+  return sum;
+}

test/js-perf-test/JSTests1.json

@@ -128,6 +128,20 @@
             { "name": "Add-Random" }
           ]
         },
+        {
+          "name": "Add-No-Opt",
+          "main": "run.js",
+          "flags": ["--allow-natives-syntax", "--no-turbofan"],
+          "resources": ["add-no-opt.js", "bigint-util.js"],
+          "test_flags": ["add-no-opt"],
+          "results_regexp": "^BigInt\\-%s\\(Score\\): (.+)$",
+          "tests": [
+            { "name": "Add-Small" },
+            { "name": "Add-Large" },
+            { "name": "Add-LargerThanSmall" },
+            { "name": "Add-Random" }
+          ]
+        },
         {
           "name": "Subtract",
           "main": "run.js",