Upload Kmake

deps/v8/test/mjsunit/turboshaft/maglev-frontend/regress-354145409-2.js

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+// Copyright 2024 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 --turbolev --turbofan
+
+function g(b) {
+  if (b) {
+    throw_because_function_not_defined();
+  }
+}
+%NeverOptimizeFunction(g);
+
+function A() {}
+class B extends A {}
+class C {}
+
+function is_a(o, b) {
+  let v = 12;
+  try {
+    v += 1;
+    g(b);
+    v += 1;
+    return o instanceof A;
+  } catch (e) {
+    return v;
+  }
+}
+
+%PrepareFunctionForOptimization(is_a);
+assertEquals(true, is_a(new B(), false));
+assertEquals(13, is_a(new B(), true));
+assertEquals(true, is_a(new A(), false));
+assertEquals(13, is_a(new A(), true));
+assertEquals(false, is_a(new C(), false));
+assertEquals(13, is_a(new C(), true));
+%OptimizeFunctionOnNextCall(is_a);
+assertEquals(true, is_a(new B(), false));
+assertEquals(13, is_a(new B(), true));
+assertEquals(true, is_a(new A(), false));
+assertEquals(13, is_a(new A(), true));
+assertEquals(false, is_a(new C(), false));
+assertEquals(13, is_a(new C(), true));
+assertOptimized(is_a);
+
+// Changing manually the prototype of an object.
+let b = new B();
+assertEquals(true, is_a(b, false));
+assertEquals(13, is_a(b, true));
+Object.setPrototypeOf(b, {});
+assertEquals(false, is_a(b, false));
+assertEquals(13, is_a(b, true));
+assertOptimized(is_a);