bbc89774a6
This mostly reverts commit c503b80595 but fixes
an issue where literals would always be pretenured on first instantiation.
As a cleanup we pass in a PretenureFlag instead of using the FeedbackVector as
indicator.
Bug: v8:6211
Change-Id: Id328552620e33f5083519bcba1e24396d162d516
Reviewed-on: https://chromium-review.googlesource.com/555670
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46342}
44 lines
1.3 KiB
JavaScript
44 lines
1.3 KiB
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-always-opt
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function literals_sharing_test(warmup, optimize) {
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function closure() {
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// Ensure small array literals start in specific element kind mode.
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assertTrue(%HasFastSmiElements([]));
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assertTrue(%HasFastSmiElements([1]));
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assertTrue(%HasFastSmiElements([1,2]));
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assertTrue(%HasFastDoubleElements([1.1]));
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assertTrue(%HasFastDoubleElements([1.1,2]));
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var a = [1, 2, 3];
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if (warmup) {
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// Transition elements kind during warmup...
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assertTrue(%HasFastSmiElements(a));
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assertEquals(4, a.push(1.3));
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}
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// ... and ensure that the information about transitioning is
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// propagated to the next closure.
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assertTrue(%HasFastDoubleElements(a));
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};
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if (optimize) %OptimizeFunctionOnNextCall(closure);
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closure();
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}
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function test() {
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for (var i = 0; i < 3; i++) {
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// We only start tracking allocation information with the second
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// instantiation.
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var warmup = i < 2;
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print("iter: " + i + ", warmup: "+ warmup);
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literals_sharing_test(warmup, false);
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}
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print("iter: " + i + ", opt: true");
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literals_sharing_test(warmup, true);
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}
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test();
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