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<title>[193480] trunk/Source/JavaScriptCore</title>
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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/193480">193480</a></dd>
<dt>Author</dt> <dd>fpizlo@apple.com</dd>
<dt>Date</dt> <dd>2015-12-04 14:54:26 -0800 (Fri, 04 Dec 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>Having a bad time has a really awful time when it runs at the same time as the JIT
https://bugs.webkit.org/show_bug.cgi?id=151882
rdar://problem/23547038
Unreviewed, really adding the test this time.
* tests/stress/ftl-has-a-bad-time.js: Added.
(foo):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoretestsstressftlhasabadtimejs">trunk/Source/JavaScriptCore/tests/stress/ftl-has-a-bad-time.js</a></li>
</ul>
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<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (193479 => 193480)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2015-12-04 22:41:44 UTC (rev 193479)
+++ trunk/Source/JavaScriptCore/ChangeLog 2015-12-04 22:54:26 UTC (rev 193480)
</span><span class="lines">@@ -1,3 +1,14 @@
</span><ins>+2015-12-04 Filip Pizlo <fpizlo@apple.com>
+
+ Having a bad time has a really awful time when it runs at the same time as the JIT
+ https://bugs.webkit.org/show_bug.cgi?id=151882
+ rdar://problem/23547038
+
+ Unreviewed, really adding the test this time.
+
+ * tests/stress/ftl-has-a-bad-time.js: Added.
+ (foo):
+
</ins><span class="cx"> 2015-12-04 Mark Lam <mark.lam@apple.com>
</span><span class="cx">
</span><span class="cx"> Snippefy bitwise operators for the baseline JIT.
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoretestsstressftlhasabadtimejs"></a>
<div class="addfile"><h4>Added: trunk/Source/JavaScriptCore/tests/stress/ftl-has-a-bad-time.js (0 => 193480)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/tests/stress/ftl-has-a-bad-time.js (rev 0)
+++ trunk/Source/JavaScriptCore/tests/stress/ftl-has-a-bad-time.js 2015-12-04 22:54:26 UTC (rev 193480)
</span><span class="lines">@@ -0,0 +1,18 @@
</span><ins>+function foo(p) {
+ return p ? [42] : null;
+}
+
+noInline(foo);
+
+// Make sure we think that foo() allocates int arrays.
+for (var i = 0; i < 100; ++i)
+ foo(true);
+
+// Now have a bad time.
+var array = new Array();
+Array.prototype.__defineSetter__("0", function() { });
+
+// Finally, get foo() to compile in the FTL. But don't allocate anymore arrays.
+for (var i = 0; i < 100000; ++i)
+ foo(false);
+
</ins></span></pre>
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