test/mjsunit/compiler/inline-arguments.js

// Copyright 2011 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
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//       with the distribution.
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//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
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// Flags: --allow-natives-syntax

function A() {
}

A.prototype.X = function (a, b, c) {
  assertTrue(this instanceof A);
  assertEquals(1, a);
  assertEquals(2, b);
  assertEquals(3, c);
};

A.prototype.Y = function () {
  this.X.apply(this, arguments);
};

A.prototype.Z = function () {
  this.Y(1,2,3);
};

var a = new A();
a.Z(4,5,6);
a.Z(4,5,6);
%OptimizeFunctionOnNextCall(a.Z);
a.Z(4,5,6);
A.prototype.X.apply = function (receiver, args) {
  return Function.prototype.apply.call(this, receiver, args);
};
a.Z(4,5,6);


// Ensure that HArgumentsObject is inserted in a correct place
// and dominates all uses.
function F1() { }
function F2() { F1.apply(this, arguments); }
function F3(x, y) {
  if (x) {
    F2(y);
  }
}

function F31() {
  return F1.apply(this, arguments);
}

function F4() {
  F3(true, false);
  return F31(1);
}

F4(1);
F4(1);
F4(1);
%OptimizeFunctionOnNextCall(F4);
F4(1);


// Test correct adapation of arguments.
// Strict mode prevents arguments object from shadowing parameters.
(function () {
  "use strict";

  function G2() {
    assertArrayEquals([1,2], arguments);
  }

  function G4() {
    assertArrayEquals([1,2,3,4], arguments);
  }

  function adapt2to4(a, b, c, d) {
    G2.apply(this, arguments);
  }

  function adapt4to2(a, b) {
    G4.apply(this, arguments);
  }

  function test_adaptation() {
    adapt2to4(1, 2);
    adapt4to2(1, 2, 3, 4);
  }

  test_adaptation();
  test_adaptation();
  %OptimizeFunctionOnNextCall(test_adaptation);
  test_adaptation();
})();