v8/test/mjsunit/manual-parallel-recompile.js

// Copyright 2012 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
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//
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// Flags: --allow-natives-syntax --expose-gc
// Flags: --parallel-recompilation --parallel-recompilation-delay=50

function assertUnoptimized(fun) {
  assertTrue(%GetOptimizationStatus(fun) != 1);
}

function assertOptimized(fun) {
  assertTrue(%GetOptimizationStatus(fun) != 2);
}

function f(x) {
  var xx = x * x;
  var xxstr = xx.toString();
  return xxstr.length;
}

function g(x) {
  var xxx = Math.sqrt(x) | 0;
  var xxxstr = xxx.toString();
  return xxxstr.length;
}

function k(x) {
  return x * x;
}

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

%OptimizeFunctionOnNextCall(f, "parallel");
%OptimizeFunctionOnNextCall(g, "parallel");
f(g(2));  // Trigger optimization.

if (%IsParallelRecompilationSupported()) {
  assertUnoptimized(f);  // Not yet optimized.
  assertUnoptimized(g);
}

%CompleteOptimization(f);  // Wait till optimized code is installed.
%CompleteOptimization(g);

assertOptimized(f);  // Optimized now.
assertOptimized(g);