test/mjsunit/compiler/deopt-args.js

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// Flags: --allow-natives-syntax

function g(x) {
  return x.f(0,1,2);
}

function f(a,b,c) {
  return 42;
}

var object = { };
object.f = f;
for (var i = 0; i < 5; i++) {
  assertEquals(42, g(object));
}
%OptimizeFunctionOnNextCall(g);
g(object);

object.f = function(a,b,c) { return 87; };
assertEquals(87, g(object));