v8/test/mjsunit/compiler/optimized-function-calls.js

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// Flags: --allow-natives-syntax --expose-gc

function f() {
  gc();
  return 87;
}


var x = 42, y = 99;
function g() {
  return x | f() | (y | (x | (f() | x)));
}
f();  // Give us a chance to optimize f.
assertEquals(42 | 87 | 99, g());


// Regression test for issue where we would try do an illegal
// compile-time lookup on a null prototype.
var object = { f: function() { return 42; }, x: 42 };
delete object.x;
function call_f(o) {
  return o.f();
}
%PrepareFunctionForOptimization(call_f);
for (var i = 0; i < 5; i++) call_f(object);
%OptimizeFunctionOnNextCall(call_f);
call_f(object);


// Check that nested global function calls work.
function f0() {
  return 42;
}

function f1(a) {
  return a;
}

function f2(a, b) {
  return a * b;
}

function f3(a, b, c) {
  return a + b - c;
}

function f4(a, b, c, d) {
  return a * b + c - d;
}

function nested() {
  return f4(f3(f2(f1(f0()),f0()),f1(f0()),f0()),f2(f1(f0()),f0()),f1(f0()),f0())
    + f4(f0(),f1(f0()),f2(f1(f0()),f0()),f3(f2(f1(f0()),f0()),f1(f0()),f0()));
}
assertEquals(3113460, nested());