v8/test/mjsunit/compiler/regress-funarguments.js

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// Flags: --allow-natives-syntax

// Test function.arguments.

function A() {}
function B() {}

function fee(x, y) {
  if (x == 1) return fee["arg" + "uments"];
  if (x == 2) return gee["arg" + "uments"];
  return 42;
}

function gee(x) { return this.f(2 - x, "f"); }

function foo(x, y) {
  if (x == 0) return foo["arg" + "uments"];
  if (x == 1) return goo["arg" + "uments"];
  return 42;
}

function goo(x) { return this.f(x, "f"); }

A.prototype.f = fee;
A.prototype.g = gee;

B.prototype.f = foo;
B.prototype.g = goo;

var o = new A();

function hej(x) {
  if (x == 0) return o.g(x, "h");
  if (x == 1) return o.g(x, "h");
  return o.g(x, "z");
}

function opt() {
  for (var k=0; k<2; k++) {
    for (var i=0; i<5; i++) o.g(i, "g");
    for (var j=0; j<5; j++) hej(j);
  }
  %OptimizeFunctionOnNextCall(o.g);
  %OptimizeFunctionOnNextCall(hej);
}

opt();
assertArrayEquals([0, "g"], o.g(0, "g"));
assertArrayEquals([1, "f"], o.g(1, "g"));
assertArrayEquals([0, "h"], hej(0));
assertArrayEquals([1, "f"], hej(1));

o = new B();

opt();
assertArrayEquals([0, "f"], o.g(0, "g"));
assertArrayEquals([1, "g"], o.g(1, "g"));
assertArrayEquals([0, "f"], hej(0));
assertArrayEquals([1, "h"], hej(1));