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<title>[171767] branches/ftlopt/Source/JavaScriptCore</title>
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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/171767">171767</a></dd>
<dt>Author</dt> <dd>mmirman@apple.com</dd>
<dt>Date</dt> <dd>2014-07-29 14:49:53 -0700 (Tue, 29 Jul 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>[ftlopt] Added SkipTopScope coverage to FTL</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branchesftloptSourceJavaScriptCoreChangeLog">branches/ftlopt/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#branchesftloptSourceJavaScriptCoreftlFTLCapabilitiescpp">branches/ftlopt/Source/JavaScriptCore/ftl/FTLCapabilities.cpp</a></li>
<li><a href="#branchesftloptSourceJavaScriptCoreftlFTLLowerDFGToLLVMcpp">branches/ftlopt/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="branchesftloptSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ChangeLog (171766 => 171767)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ChangeLog 2014-07-29 21:41:36 UTC (rev 171766)
+++ branches/ftlopt/Source/JavaScriptCore/ChangeLog 2014-07-29 21:49:53 UTC (rev 171767)
</span><span class="lines">@@ -1,3 +1,16 @@
</span><ins>+2014-07-29 Matthew Mirman <mmirman@apple.com>
+
+ [ftlopt] Added SkipTopScope coverage to FTL
+ https://bugs.webkit.org/show_bug.cgi?id=134990
+
+ Reviewed by Filip Pizlo.
+
+ * ftl/FTLCapabilities.cpp:
+ (JSC::FTL::canCompile): Added case for SkipTopScope
+ * ftl/FTLLowerDFGToLLVM.cpp:
+ (JSC::FTL::LowerDFGToLLVM::compileNode): Added case for SkipTopScope
+ (JSC::FTL::LowerDFGToLLVM::compileSkipTopScope): Added.
+
</ins><span class="cx"> 2014-07-28 Mark Hahnenberg <mhahnenberg@apple.com>
</span><span class="cx">
</span><span class="cx"> Support for-in in the FTL
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLCapabilitiescpp"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLCapabilities.cpp (171766 => 171767)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLCapabilities.cpp 2014-07-29 21:41:36 UTC (rev 171766)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLCapabilities.cpp 2014-07-29 21:49:53 UTC (rev 171767)
</span><span class="lines">@@ -99,6 +99,7 @@
</span><span class="cx"> case LoopHint:
</span><span class="cx"> case GetMyScope:
</span><span class="cx"> case SkipScope:
</span><ins>+ case SkipTopScope:
</ins><span class="cx"> case GetClosureRegisters:
</span><span class="cx"> case GetClosureVar:
</span><span class="cx"> case PutClosureVar:
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLLowerDFGToLLVMcpp"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp (171766 => 171767)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp 2014-07-29 21:41:36 UTC (rev 171766)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp 2014-07-29 21:49:53 UTC (rev 171767)
</span><span class="lines">@@ -593,6 +593,9 @@
</span><span class="cx"> case SkipScope:
</span><span class="cx"> compileSkipScope();
</span><span class="cx"> break;
</span><ins>+ case SkipTopScope:
+ compileSkipTopScope();
+ break;
</ins><span class="cx"> case GetClosureRegisters:
</span><span class="cx"> compileGetClosureRegisters();
</span><span class="cx"> break;
</span><span class="lines">@@ -3434,6 +3437,30 @@
</span><span class="cx"> setJSValue(m_out.loadPtr(lowCell(m_node->child1()), m_heaps.JSScope_next));
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+
+ void compileSkipTopScope()
+ {
+ LValue scope = lowCell(m_node->child1());
+
+ LBasicBlock isNull = FTL_NEW_BLOCK(m_out, ("Activation register is null"));
+ LBasicBlock notNull = FTL_NEW_BLOCK(m_out, ("Activation register is not null"));
+
+ VirtualRegister machineActivationRegister = m_graph.machineActivationRegister();
+
+ ValueFromBlock top = m_out.anchor(scope);
+ m_out.branch(
+ m_out.isZero64(m_out.load64(addressFor(machineActivationRegister))), unsure(isNull), unsure(notNull));
+
+ LBasicBlock lastNext = m_out.appendTo(isNull, notNull);
+ ValueFromBlock next = m_out.anchor(m_out.loadPtr(scope, m_heaps.JSScope_next));
+
+ m_out.jump(notNull);
+ m_out.appendTo(notNull, lastNext);
+
+ setJSValue(m_out.phi(m_out.intPtr, top, next));
+ }
+
+
</ins><span class="cx"> void compileGetClosureRegisters()
</span><span class="cx"> {
</span><span class="cx"> if (WriteBarrierBase<Unknown>* registers = m_graph.tryGetRegisters(m_node->child1().node())) {
</span></span></pre>
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