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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/166695">166695</a></dd>
<dt>Author</dt> <dd>benjamin@webkit.org</dd>
<dt>Date</dt> <dd>2014-04-02 22:28:43 -0700 (Wed, 02 Apr 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>CSS JIT: the adjacent position is never reset
https://bugs.webkit.org/show_bug.cgi?id=131145
Reviewed by Andreas Kling.
Source/WebCore:
Corresponding radar: <rdar://problem/16440036>. The backtracking action would use a tail
when not needed.
Test: fast/selectors/multiple-adjacent-chain-without-adjacent-tail.html
* cssjit/SelectorCompiler.cpp:
(WebCore::SelectorCompiler::updateChainStates):
LayoutTests:
* fast/selectors/multiple-adjacent-chain-without-adjacent-tail-expected.txt: Added.
* fast/selectors/multiple-adjacent-chain-without-adjacent-tail.html: Added.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsChangeLog">trunk/LayoutTests/ChangeLog</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorecssjitSelectorCompilercpp">trunk/Source/WebCore/cssjit/SelectorCompiler.cpp</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsfastselectorsmultipleadjacentchainwithoutadjacenttailexpectedtxt">trunk/LayoutTests/fast/selectors/multiple-adjacent-chain-without-adjacent-tail-expected.txt</a></li>
<li><a href="#trunkLayoutTestsfastselectorsmultipleadjacentchainwithoutadjacenttailhtml">trunk/LayoutTests/fast/selectors/multiple-adjacent-chain-without-adjacent-tail.html</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/ChangeLog (166694 => 166695)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/ChangeLog 2014-04-03 05:05:25 UTC (rev 166694)
+++ trunk/LayoutTests/ChangeLog 2014-04-03 05:28:43 UTC (rev 166695)
</span><span class="lines">@@ -1,3 +1,13 @@
</span><ins>+2014-04-02 Benjamin Poulain <benjamin@webkit.org>
+
+ CSS JIT: the adjacent position is never reset
+ https://bugs.webkit.org/show_bug.cgi?id=131145
+
+ Reviewed by Andreas Kling.
+
+ * fast/selectors/multiple-adjacent-chain-without-adjacent-tail-expected.txt: Added.
+ * fast/selectors/multiple-adjacent-chain-without-adjacent-tail.html: Added.
+
</ins><span class="cx"> 2014-04-02 Stephanie Lewis <slewis@apple.com>
</span><span class="cx">
</span><span class="cx"> Roll out http://trac.webkit.org/changeset/166144
</span></span></pre></div>
<a id="trunkLayoutTestsfastselectorsmultipleadjacentchainwithoutadjacenttailexpectedtxt"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/selectors/multiple-adjacent-chain-without-adjacent-tail-expected.txt (0 => 166695)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/selectors/multiple-adjacent-chain-without-adjacent-tail-expected.txt (rev 0)
+++ trunk/LayoutTests/fast/selectors/multiple-adjacent-chain-without-adjacent-tail-expected.txt 2014-04-03 05:28:43 UTC (rev 166695)
</span><span class="lines">@@ -0,0 +1,14 @@
</span><ins>+Test very long backtracking of a direct adjacent chain.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+
+PASS document.querySelectorAll("li+li~li+li").length is 38
+PASS document.querySelectorAll("li+li~li+li~li+li").length is 36
+PASS document.querySelectorAll("li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li").length is 20
+PASS allItems.length is 41
+PASS coloredCount is 20
+PASS successfullyParsed is true
+
+TEST COMPLETE
+
</ins></span></pre></div>
<a id="trunkLayoutTestsfastselectorsmultipleadjacentchainwithoutadjacenttailhtml"></a>
<div class="addfile"><h4>Added: trunk/LayoutTests/fast/selectors/multiple-adjacent-chain-without-adjacent-tail.html (0 => 166695)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/fast/selectors/multiple-adjacent-chain-without-adjacent-tail.html (rev 0)
+++ trunk/LayoutTests/fast/selectors/multiple-adjacent-chain-without-adjacent-tail.html 2014-04-03 05:28:43 UTC (rev 166695)
</span><span class="lines">@@ -0,0 +1,83 @@
</span><ins>+<!doctype html>
+<html>
+<head>
+<script src="../../resources/js-test-pre.js"></script>
+<style>
+li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li {
+ background-color: rgb(1, 2, 3);
+}
+li+li~li+li~li+li {
+ color: red;
+}
+li+li~li+li {
+ color: blue;
+}
+</style>
+</head>
+<body>
+<div style="display:none">
+ <ul id=targetTree>
+ <li class=first></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ <li class=target></li>
+ </ul>
+</div>
+</body>
+<script>
+description('Test very long backtracking of a direct adjacent chain.');
+
+shouldBe('document.querySelectorAll("li+li~li+li").length', '38');
+shouldBe('document.querySelectorAll("li+li~li+li~li+li").length', '36');
+shouldBe('document.querySelectorAll("li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li~li+li").length', '20');
+
+var allItems = document.getElementById('targetTree').querySelectorAll('li');
+var coloredCount = 0;
+for (var i = 0; i < allItems.length; ++i) {
+ if (getComputedStyle(allItems[i]).backgroundColor === 'rgb(1, 2, 3)')
+ coloredCount++;
+}
+
+shouldBe('allItems.length', '41');
+shouldBe('coloredCount', '20');
+
+</script>
+<script src="../../resources/js-test-post.js"></script>
+</html>
</ins></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (166694 => 166695)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog 2014-04-03 05:05:25 UTC (rev 166694)
+++ trunk/Source/WebCore/ChangeLog 2014-04-03 05:28:43 UTC (rev 166695)
</span><span class="lines">@@ -1,3 +1,18 @@
</span><ins>+2014-04-02 Benjamin Poulain <benjamin@webkit.org>
+
+ CSS JIT: the adjacent position is never reset
+ https://bugs.webkit.org/show_bug.cgi?id=131145
+
+ Reviewed by Andreas Kling.
+
+ Corresponding radar: <rdar://problem/16440036>. The backtracking action would use a tail
+ when not needed.
+
+ Test: fast/selectors/multiple-adjacent-chain-without-adjacent-tail.html
+
+ * cssjit/SelectorCompiler.cpp:
+ (WebCore::SelectorCompiler::updateChainStates):
+
</ins><span class="cx"> 2014-04-02 Brent Fulgham <bfulgham@apple.com>
</span><span class="cx">
</span><span class="cx"> Speculative build fix for Windows.
</span></span></pre></div>
<a id="trunkSourceWebCorecssjitSelectorCompilercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/cssjit/SelectorCompiler.cpp (166694 => 166695)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/cssjit/SelectorCompiler.cpp 2014-04-03 05:05:25 UTC (rev 166694)
+++ trunk/Source/WebCore/cssjit/SelectorCompiler.cpp 2014-04-03 05:28:43 UTC (rev 166695)
</span><span class="lines">@@ -513,6 +513,7 @@
</span><span class="cx"> break;
</span><span class="cx"> case FragmentRelation::IndirectAdjacent:
</span><span class="cx"> hasIndirectAdjacentRelationOnTheRightOfDirectAdjacentChain = true;
</span><ins>+ adjacentPositionSinceIndirectAdjacentTreeWalk = 0;
</ins><span class="cx"> break;
</span><span class="cx"> }
</span><span class="cx"> }
</span></span></pre>
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