bcf43eb780
Add a test for the case where SlicedStrings of ThinStrings are looked up in the string table, testing the path that the original string's length differs from the actual string's length. Bug: chromium:1309767 Change-Id: I909c64397bf28ec33c3324d94882fbfe81ac4109 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3549837 Reviewed-by: Leszek Swirski <leszeks@chromium.org> Commit-Queue: Shu-yu Guo <syg@chromium.org> Auto-Submit: Shu-yu Guo <syg@chromium.org> Cr-Commit-Position: refs/heads/main@{#79610}
112 lines
2.6 KiB
JavaScript
112 lines
2.6 KiB
JavaScript
// Copyright 2016 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 get_thin_string(a, b) {
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var str = a + b; // Make a ConsString.
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var o = {};
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o[str]; // Turn it into a ThinString.
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return str;
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}
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var str = get_thin_string("foo", "bar");
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var re = /.o+ba./;
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assertEquals(["foobar"], re.exec(str));
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assertEquals(["foobar"], re.exec(str));
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assertEquals(["foobar"], re.exec(str));
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function CheckCS() {
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assertEquals("o", str.substring(1, 2));
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assertEquals("f".charCodeAt(0), str.charCodeAt(0));
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assertEquals("f", str.split(/oo/)[0]);
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};
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%PrepareFunctionForOptimization(CheckCS);
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CheckCS();
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%OptimizeFunctionOnNextCall(CheckCS);
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CheckCS();
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function CheckTF() {
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try {
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} catch (e) {
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} // Turbofan.
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assertEquals("o", str.substring(1, 2));
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assertEquals("f".charCodeAt(0), str.charCodeAt(0));
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assertEquals("f", str.split(/oo/)[0]);
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};
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%PrepareFunctionForOptimization(CheckTF);
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CheckTF();
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%OptimizeFunctionOnNextCall(CheckTF);
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CheckTF();
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// Flat cons strings can point to a thin string.
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function get_cons_thin_string(a, b) {
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// Make a ConsString.
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var s = a + b;
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// Flatten it.
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s.endsWith("a");
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// Internalize the first part.
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var o = {};
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o[s];
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return s;
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}
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var s = get_cons_thin_string("__________", "@@@@@@@@@@a");
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s.match(/.*a/);
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assertEquals("________", s.substring(0, 8));
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function cc1(s) {
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assertEquals(95, s.charCodeAt(0));
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assertEquals(95, s.codePointAt(0));
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};
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%PrepareFunctionForOptimization(cc1);
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cc1(s);
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cc1(s);
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%OptimizeFunctionOnNextCall(cc1);
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cc1(s);
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// Sliced strings can have a thin string as their parent.
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function get_sliced_thin_string(a, b) {
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// Make a long thin string.
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var s = a + b;
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// Slice a substring out of it.
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var slice = s.substring(0, 20);
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// Make the original string thin.
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var o = {};
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o[s];
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return slice;
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}
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var t = get_sliced_thin_string(
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'abcdefghijklmnopqrstuvwxyz', 'abcdefghijklmnopqrstuvwxyz');
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assertEquals("abcdefghijklmnopqrst", decodeURI(t));
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function cc2(s) {
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assertEquals(97, s.charCodeAt(0));
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assertEquals(97, s.codePointAt(0));
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};
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%PrepareFunctionForOptimization(cc2);
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cc2(t);
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cc2(t);
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%OptimizeFunctionOnNextCall(cc2);
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cc2(t);
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function string_table_lookup_sliced_thin_string(a, b) {
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// Make a ConsString.
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var s = a + b;
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// Slice a substring out of it.
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var slice = s.substring(0, 20);
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// Make the original string thin.
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var o = {};
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o[s];
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// Try to internalize the SlicedString.
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o[slice];
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}
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string_table_lookup_sliced_thin_string(
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'abcdefghijklmnopqrstuvwxyz', '0123456789');
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