7915cf939e
Commit 26c00f4a4c improved the names of
most FAST_* elements kinds in the enum. This patch updates the matching
Has*Elements and Is*ElementsKind method names accordingly.
- HasFastSmiElements => HasSmiElements
- IsFastSmiElementsKind => IsSmiElementsKind
- HasFastObjectElements => HasObjectElements
- IsFastObjectElementsKind => IsObjectElementsKind
- HasFastSmiOrObjectElements => HasSmiOrObjectElements
- IsFastSmiOrObjectElementsKind => IsSmiOrObjectElementsKind
- HasFastDoubleElements => HasDoubleElements
- IsFastDoubleElementsKind => IsDoubleElementsKind
- HasFastHoleyElements => HasHoleyElements
- IsFastHoleyElementsKind => IsHoleyElementsKind
Additionally, FastHoleyElementsUsage is renamed to HoleyElementsUsage.
BUG=v8:6548
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
Change-Id: Ie8f3d01eb43e909cbc6c372d88c5fbc4dfc2ac04
Reviewed-on: https://chromium-review.googlesource.com/558356
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#46376}
59 lines
1.9 KiB
JavaScript
59 lines
1.9 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
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function Migrator(o) {
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return o.foo;
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}
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function Loader(o) {
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return o[0];
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}
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var first_smi_array = [1];
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var second_smi_array = [2];
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var first_object_array = ["first"];
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var second_object_array = ["string"];
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assertTrue(%HasSmiElements(first_smi_array));
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assertTrue(%HasSmiElements(second_smi_array));
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assertTrue(%HasObjectElements(first_object_array));
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assertTrue(%HasObjectElements(second_object_array));
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// Prepare identical transition chains for smi and object arrays.
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first_smi_array.foo = 0;
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second_smi_array.foo = 0;
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first_object_array.foo = 0;
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second_object_array.foo = 0;
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// Collect type feedback for not-yet-deprecated original object array map.
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for (var i = 0; i < 3; i++) Migrator(second_object_array);
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// Blaze a migration trail for smi array maps.
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// This marks the migrated smi array map as a migration target.
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first_smi_array.foo = 0.5;
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print(second_smi_array.foo);
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// Deprecate original object array map.
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// Use TryMigrate from deferred optimized code to migrate second object array.
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first_object_array.foo = 0.5;
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%OptimizeFunctionOnNextCall(Migrator);
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Migrator(second_object_array);
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// |second_object_array| now erroneously has a smi map.
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// Optimized code assuming smi elements will expose this.
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for (var i = 0; i < 3; i++) Loader(second_smi_array);
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%OptimizeFunctionOnNextCall(Loader);
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assertEquals("string", Loader(second_object_array));
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// Any of the following checks will also fail:
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assertTrue(%HasObjectElements(second_object_array));
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assertFalse(%HasSmiElements(second_object_array));
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assertTrue(%HaveSameMap(first_object_array, second_object_array));
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assertFalse(%HaveSameMap(first_smi_array, second_object_array));
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%ClearFunctionFeedback(Loader);
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%ClearFunctionFeedback(Migrator);
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