| // Copyright 2020 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 --super-ic --opt |
| // Flags: --no-always-opt --no-stress-opt --turboprop |
| // Flags: --turboprop-dynamic-map-checks --deopt-every-n-times=0 |
| |
| // This file contains tests which require --dynamic-map-chekcs. |
| |
| (function TestMinimorphicPropertyAccess() { |
| class A {} |
| A.prototype.bar = "wrong value: A.prototype.bar"; |
| |
| class B extends A {}; |
| B.prototype.bar = "correct value"; |
| |
| class C extends B { |
| foo(should_bailout) { |
| const r = super.bar; |
| const did_bailout = ( |
| %GetOptimizationStatus(C.prototype.foo) & |
| V8OptimizationStatus.kTopmostFrameIsTurboFanned) == 0; |
| assertEquals(should_bailout, did_bailout); |
| return r; |
| } |
| } |
| C.prototype.bar = "wrong value: C.prototype.bar"; |
| %PrepareFunctionForOptimization(C.prototype.foo); |
| |
| let o = new C(); |
| o.bar = "wrong value: o.bar"; |
| |
| // Fill in the feedback. |
| let r = o.foo(true); |
| assertEquals("correct value", r); |
| %OptimizeFunctionOnNextCall(C.prototype.foo); |
| |
| // Test the optimized function. |
| r = o.foo(false); |
| assertEquals("correct value", r); |
| })(); |