src/v8/test/mjsunit/regress/regress-calls-with-migrating-prototypes.js

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//
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// Flags: --allow-natives-syntax

function f() {
 return 1;
}
function C1(f) {
 this.f = f;
}
var o1 = new C1(f);
var o2 = {__proto__: new C1(f) }
function foo(o) {
 return o.f();
}
foo(o1);
foo(o1);
foo(o2);
foo(o1);
var o3 = new C1(function() { return 2; });
%OptimizeFunctionOnNextCall(foo);
assertEquals(1, foo(o2));
o2.__proto__.f = function() { return 3; };
assertEquals(3, foo(o2));