ced5628226
Finally address that long-standing TODO where ConsString allocation in TurboFan would always go for the two byte map instead of choosing the one byte map if the inputs are one byte strings. Bug: v8:5269, v8:7109 Change-Id: Ibcfceaf499ceebef0ef928ebc5f204bcacf29bc0 Reviewed-on: https://chromium-review.googlesource.com/799700 Reviewed-by: Jakob Gruber <jgruber@chromium.org> Commit-Queue: Benedikt Meurer <bmeurer@chromium.org> Cr-Commit-Position: refs/heads/master@{#49744}
72 lines
1.7 KiB
JavaScript
72 lines
1.7 KiB
JavaScript
// Copyright 2017 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 --expose-externalize-string
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(function() {
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function foo(s) {
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return "abcdefghijklm" + s;
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}
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assertTrue(isOneByteString(foo("0")));
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assertTrue(isOneByteString(foo("0")));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(isOneByteString(foo("0")));
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})();
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(function() {
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function foo(s) {
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return s + "abcdefghijklm";
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}
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assertTrue(isOneByteString(foo("0")));
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assertTrue(isOneByteString(foo("0")));
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%OptimizeFunctionOnNextCall(foo);
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assertTrue(isOneByteString(foo("0")));
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})();
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(function() {
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function foo(s) {
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return "abcdefghijklm" + s;
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}
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assertFalse(isOneByteString(foo("\u1234")));
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assertFalse(isOneByteString(foo("\u1234")));
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(isOneByteString(foo("\u1234")));
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})();
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(function() {
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function foo(s) {
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return s + "abcdefghijklm";
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}
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assertFalse(isOneByteString(foo("\u1234")));
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assertFalse(isOneByteString(foo("\u1234")));
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(isOneByteString(foo("\u1234")));
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})();
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(function() {
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function foo(s) {
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return "abcdefghijkl\u1234" + s;
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}
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assertFalse(isOneByteString(foo("0")));
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assertFalse(isOneByteString(foo("0")));
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(isOneByteString(foo("0")));
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})();
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(function() {
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function foo(s) {
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return s + "abcdefghijkl\u1234";
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}
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assertFalse(isOneByteString(foo("0")));
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assertFalse(isOneByteString(foo("0")));
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%OptimizeFunctionOnNextCall(foo);
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assertFalse(isOneByteString(foo("0")));
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})();
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