src/v8/test/mjsunit/regress/regress-2618.js

// Copyright 2013 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: --use-osr --allow-natives-syntax --ignition-osr --opt
// Flags: --no-always-opt

// Can't OSR with always-opt.
assertFalse(isAlwaysOptimize());

function f() {
  do {
    do {
      for (var i = 0; i < 10; i++) %OptimizeOsr();
      // Note: this check can't be wrapped in a function, because
      // calling that function causes a deopt from lack of call
      // feedback.
      var opt_status = %GetOptimizationStatus(f);
      assertTrue(
        (opt_status & V8OptimizationStatus.kMaybeDeopted) !== 0 ||
        (opt_status & V8OptimizationStatus.kTopmostFrameIsTurboFanned) !== 0);
    } while (false);
  } while (false);
}

f();

function g() {
  for (var i = 0; i < 1; i++) { }

  do {
    do {
      for (var i = 0; i < 1; i++) { }
    } while (false);
  } while (false);

  do {
    do {
      do {
        do {
          do {
            do {
              do {
                do {
                  for (var i = 0; i < 10; i++) %OptimizeOsr();
                  var opt_status = %GetOptimizationStatus(g);
                  assertTrue(
                    (opt_status & V8OptimizationStatus.kMaybeDeopted) !== 0 ||
                    (opt_status &
                        V8OptimizationStatus.kTopmostFrameIsTurboFanned) !== 0);
                } while (false);
              } while (false);
            } while (false);
          } while (false);
        } while (false);
      } while (false);
    } while (false);
  } while (false);
}

g();