45b4522e40
This is in preparation to the removal of the FullCodeGenerator, we no longer need the ability to stress the underlying implementation. R=rmcilroy@chromium.org BUG=v8:6409 Cq-Include-Trybots: master.tryserver.v8:v8_linux_noi18n_rel_ng Change-Id: Iad3177d6de4a68b57c12a770b6e85ed7a9710254 Reviewed-on: https://chromium-review.googlesource.com/584747 Reviewed-by: Ross McIlroy <rmcilroy@chromium.org> Commit-Queue: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#47276}
26 lines
824 B
JavaScript
26 lines
824 B
JavaScript
// Copyright 2015 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 --no-stress-opt --opt --no-always-opt
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// --nostress-opt is specified because the test corrupts the "pristine"
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// array prototype chain by storing an element, and this is tracked
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// per-isolate. A subsequent stress run would send the load generic,
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// and no more deoptimizations of foo would occur.
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function foo(a, i) { return a[i]; }
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var a = ['one', , 'three'];
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foo(a, 0);
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foo(a, 0);
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foo(a, 0);
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%OptimizeFunctionOnNextCall(foo);
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assertEquals(undefined, foo(a, 1));
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assertOptimized(foo);
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// Whereas if we disrupt the prototype chain...
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Array.prototype[1] = 'cow';
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assertEquals('cow', foo(a, 1));
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assertUnoptimized(foo);
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