v8/test/mjsunit/compiler/manual-concurrent-recompile.js

// Copyright 2012 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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// Flags: --allow-natives-syntax --expose-gc
// Flags: --concurrent-recompilation
// Flags: --turbofan --no-always-turbofan

function f(x) {
  var xx = x * x;
  var xxstr = xx.toString();
  return xxstr.length;
};
%PrepareFunctionForOptimization(f);
function g(x) {
  var xxx = Math.sqrt(x) | 0;
  var xxxstr = xxx.toString();
  return xxxstr.length;
};
%PrepareFunctionForOptimization(g);
function k(x) {
  return x * x;
}

f(g(1));
f(g(2));
assertUnoptimized(f);
assertUnoptimized(g);

%DisableOptimizationFinalization();
%OptimizeFunctionOnNextCall(f, "concurrent");
%OptimizeFunctionOnNextCall(g, "concurrent");
f(g(3));

assertUnoptimized(f);
assertUnoptimized(g);
%FinalizeOptimization();
assertOptimized(f);
assertOptimized(g);