v8/test/mjsunit/compiler/property-calls.js

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// Flags: --allow-natives-syntax

function f(o) { return o.g(); }
function g() { return 42; }

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

object = { g: function() { return 87; } };
assertEquals(87, f(object));