test/mjsunit/never-optimize.js

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// Flags: --allow-natives-syntax

function o1() {
}

if (%GetOptimizationStatus(o1) != 4) {
  // 4 == optimization disabled.
  o1(); o1();
  %OptimizeFunctionOnNextCall(o1);
  o1();

  // Check that the given function was optimized.
  assertOptimized(o1);

  // Test the %NeverOptimizeFunction runtime call.
  %NeverOptimizeFunction(u1);
  function u1() {
  }

  function u2() {
    u1();
  }

  u1(); u1();
  u2(); u2();

  %OptimizeFunctionOnNextCall(u1);
  %OptimizeFunctionOnNextCall(u2);

  u1(); u1();
  u2(); u2();

  // 2 => not optimized.
  assertUnoptimized(u1);
  assertOptimized(u2);
}