[compiler] Add some regression tests

Bug: chromium:1228407, chromium:1234764, chromium:1234770, chromium:1247763
Change-Id: I1e8ffaa04eeda22b71ece2f59038e5c92861fde0
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3172751
Commit-Queue: Georg Neis <neis@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Auto-Submit: Georg Neis <neis@chromium.org>
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76955}

test/mjsunit/compiler/regress-crbug-1228407.js

@@ -0,0 +1,24 @@
+// Copyright 2021 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.
+
+// Flags: --interrupt-budget=100
+
+function foo() {
+  return function bar() {
+    a.p = 42;
+    for (let i = 0; i < 100; i++) this.p();
+    this.p = a;
+  };
+}
+
+var a = foo();
+var b = foo();
+
+a.prototype = { p() {} };
+b.prototype = { p() {
+  this.q = new a();
+  for (let i = 0; i < 200; i++) ;
+}};
+
+new b();

test/mjsunit/compiler/regress-crbug-1234764.js

@@ -0,0 +1,21 @@
+// Copyright 2021 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.
+
+// Flags: --allow-natives-syntax
+
+function foo(arg_true) {
+  let o = {c0: 0};
+  let c0a = arg_true ? 0 : "x";
+  let c0 = Math.max(c0a, 0) + c0a;
+  let v01 = 2**32 + (o.c0 & 1);
+  let ra = ((2**32 - 1) >>> c0) - v01;
+  let rb = (-1) << (32 - c0);
+  return (ra^rb) >> 31;
+}
+
+%PrepareFunctionForOptimization(foo);
+assertEquals(0, foo(true));
+assertEquals(0, foo(true));
+%OptimizeFunctionOnNextCall(foo);
+assertEquals(0, foo(true));

test/mjsunit/compiler/regress-crbug-1234770.js

@@ -0,0 +1,14 @@
+// Copyright 2021 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.
+
+// Flags: --allow-natives-syntax
+
+function foo(a) {
+  return ((a & 1) == 1) & ((a & 2) == 1);
+}
+
+%PrepareFunctionForOptimization(foo);
+assertEquals(0, foo(1));
+%OptimizeFunctionOnNextCall(foo);
+assertEquals(0, foo(1));

test/mjsunit/compiler/regress-crbug-1247763.js

@@ -0,0 +1,30 @@
+// Copyright 2021 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.
+
+// Flags: --allow-natives-syntax
+
+class C extends Array {};
+%NeverOptimizeFunction(C);
+
+for (let i = 0; i < 3; i++) {
+
+  function store_global() { global = new C(); };
+  store_global();
+  %PrepareFunctionForOptimization(store_global);
+  store_global();
+  %OptimizeFunctionOnNextCall(store_global);
+  store_global();
+
+  new C(42);
+
+  function load_global() { global.p1 = {}; global.p2 = {}; }
+  if (i) {
+    load_global();
+    %PrepareFunctionForOptimization(load_global);
+    load_global();
+    %OptimizeFunctionOnNextCall(load_global);
+    load_global();
+  }
+
+}