55 lines
1.7 KiB
JavaScript
55 lines
1.7 KiB
JavaScript
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// Copyright 2020 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax --super-ic --opt --runtime-call-stats
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// Flags: --no-always-opt --no-stress-opt --turboprop
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// Flags: --turboprop-dynamic-map-checks
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load("test/mjsunit/runtime-callstats-helpers.js");
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%GetAndResetRuntimeCallStats();
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// This file contains tests which require --dynamic-map-chekcs.
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(function TestMinimorphicPropertyAccess() {
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class A {}
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A.prototype.bar = "wrong value: A.prototype.bar";
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class B extends A {};
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B.prototype.bar = "correct value";
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class C extends B {
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foo(should_bailout) {
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const r = super.bar;
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const did_bailout = (
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%GetOptimizationStatus(C.prototype.foo) &
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V8OptimizationStatus.kTopmostFrameIsTurboFanned) == 0;
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assertEquals(should_bailout, did_bailout);
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return r;
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}
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}
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C.prototype.bar = "wrong value: C.prototype.bar";
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%PrepareFunctionForOptimization(C.prototype.foo);
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let o = new C();
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o.bar = "wrong value: o.bar";
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// Fill in the feedback.
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let r = o.foo(true);
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assertEquals("correct value", r);
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%OptimizeFunctionOnNextCall(C.prototype.foo);
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// Test the optimized function.
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r = o.foo(false);
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assertEquals("correct value", r);
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})();
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// Assert that the tests so far generated real optimized code and not just a
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// bailout to Runtime_LoadFromSuper. TODO(marja, v8:9237): update this to track
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// the builtin we'll use for bailout cases.
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assertEquals(0, getRuntimeFunctionCallCount("LoadFromSuper"));
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// Reset runtime stats so that we don't get extra printout.
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%GetAndResetRuntimeCallStats();
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