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// Copyright 2022 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax --maglev
// Sequential string (1 byte string).
(function() {
let s = "my string";
function foo() {
return s[3];
}
%PrepareFunctionForOptimization(foo);
assertEquals("s", foo());
%OptimizeMaglevOnNextCall(foo);
assertEquals("s", foo());
})();
// Sequential string (2 byte string).
(function() {
let s = "my ⚡tring";
function foo() {
return s[3];
}
%PrepareFunctionForOptimization(foo);
assertEquals("⚡", foo());
%OptimizeMaglevOnNextCall(foo);
assertEquals("⚡", foo());
})();
// Cons string.
(function() {
let s = "my"
s += " ";
s += "string";
function foo() {
return s[3];
}
%PrepareFunctionForOptimization(foo);
assertEquals("s", foo());
%OptimizeMaglevOnNextCall(foo);
assertEquals("s", foo());
})();
// Thin string.
(function() {
let s = %ConstructThinString("my string is thin!");
function foo() {
return s[3];
}
%PrepareFunctionForOptimization(foo);
assertEquals("s", foo());
%OptimizeMaglevOnNextCall(foo);
assertEquals("s", foo());
})();
// Sliced string.
(function() {
let main_string = "The quick brown fox jumps over the lazy dog.";
let s = main_string.slice(4, 19);
function foo() {
return s[0];
}
%PrepareFunctionForOptimization(foo);
assertEquals("q", foo());
%OptimizeMaglevOnNextCall(foo);
assertEquals("q", foo());
})();
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