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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
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Add m-esr52 at 52.6.0
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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>