test/mjsunit/compiler/recursive-deopt.js

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function f(n) {
  // Force deopt in both leaf case and when returning. To make
  // debugging easier, the operation that bails out (<<) is so simple
  // that it doesn't cause GCs.
  if (n == 0) return 1 << one;
  return f(n - 1) << one;
}

function RunTests() {
  assertEquals(1 << 1, f(0));
  assertEquals(1 << 2, f(1));
  assertEquals(1 << 5, f(4));
}


var one = 1;
for (var i = 0; i < 1000000; i++) RunTests();

var one = { valueOf: function() { return 1; } };
for (var j = 0; j < 100000; j++) RunTests();