[ic] Add benchmark for LdaKeyedLoad

Bug: v8:9449
Change-Id: I7c50db92459df2a8a7da7b0bd2efdd2f3bed3e46
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1690952
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Commit-Queue: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Auto-Submit: Sathya Gunasekaran <gsathya@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62671}

test/js-perf-test/BytecodeHandlers/LdaKeyedProperty.js

@@ -0,0 +1,40 @@
+// Copyright 2019 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.
+
+function addBenchmark(name, test) {
+  new BenchmarkSuite(name, [1000],
+      [
+        new Benchmark(name, false, false, 0, test)
+      ]);
+}
+
+function objectLookupStringConstant() {
+  const x = { 1: "foo" };
+
+  for (var i = 0; i < 1000; ++i) {
+    const p = x["1"];
+  }
+}
+
+function objectLookupIndexNumber() {
+  const x = { 1: "foo" };
+  const a = 1;
+
+  for (var i = 0; i < 1000; ++i) {
+    const p = x[a];
+  }
+}
+
+function objectLookupIndexString() {
+  const x = { 1: "foo" };
+  const a = "1";
+
+  for (var i = 0; i < 1000; ++i) {
+    const p = x[a];
+  }
+}
+
+addBenchmark('Object-Lookup-String-Constant', objectLookupStringConstant);
+addBenchmark('Object-Lookup-Index-Number', objectLookupIndexNumber);
+addBenchmark('Object-Lookup-Index-String', objectLookupIndexString);

test/js-perf-test/JSTests3.json

@@ -359,6 +359,18 @@
             {"name": "Smi-Value"},
             {"name": "Prototype-Chain-Value"}
           ]
+        },
+        {
+          "name": "LdaKeyedProperty",
+          "main": "run.js",
+          "resources": [ "LdaKeyedProperty.js" ],
+          "test_flags": [ "LdaKeyedProperty" ],
+          "results_regexp": "^%s\\-BytecodeHandler\\(Score\\): (.+)$",
+          "tests": [
+            {"name": "Object-Lookup-String-Constant"},
+            {"name": "Object-Lookup-Index-Number"},
+            {"name": "Object-Lookup-Index-String"}
+          ]
         }
       ]
     },