<!DOCTYPE html>
<meta charset=utf-8>
<title>Test that we don't DCE functions that can throw</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
/* global test, assert_true */
test(function() {
  function test(root) {
    var threw = false;
    try {
        root.querySelectorAll("");
    } catch (e) { threw = true; }
    // Hot loop to make sure the JIT heuristics ion-compile this function even
    // though it's throwing exceptions (which would normally make us back off
    // of ion compilation).
    for (var i = 0; i < 1500; i++) {
      // empty
    }
    return threw;
  }

  var threw = false;
  var el = document.createElement("div");
  for (var i = 0; i < 200; i++)
      threw = test(el);
  assert_true(threw);
}, "Shouldn't optimize away throwing functions");
</script>
