v8/test/mjsunit/compiler/deopt-tonumber-compare.js

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// Copyright 2015 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
var m = (function() {
"use asm";
function f(x) {
return x < 0;
}
function g(x) {
return 0 < x;
}
return { f: f, g: g };
})();
var f = m.f;
var g = m.g;
var counter = 0;
function deopt(f) {
return {
toString : function() {
%DeoptimizeFunction(f);
counter++;
return "2";
}
};
}
assertEquals(false, f(deopt(f)));
assertEquals(1, counter);
assertEquals(true, g(deopt(g)));
assertEquals(2, counter);
%OptimizeFunctionOnNextCall(f);
assertEquals(false, f(deopt(f)));
assertEquals(3, counter);
%OptimizeFunctionOnNextCall(g);
assertEquals(true, g(deopt(g)));
assertEquals(4, counter);