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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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27
dom/bindings/test/test_throwing_method_noDCE.html Normal file
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<!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>
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++) {}
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>