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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/179851">179851</a></dd>
<dt>Author</dt> <dd>fpizlo@apple.com</dd>
<dt>Date</dt> <dd>2015-02-09 15:39:57 -0800 (Mon, 09 Feb 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>DFG call codegen should resolve the callee operand as late as possible
https://bugs.webkit.org/show_bug.cgi?id=141398
Reviewed by Mark Lam.
This is mostly a benign restructuring to help with the implementation of
https://bugs.webkit.org/show_bug.cgi?id=141332.
* dfg/DFGSpeculativeJIT32_64.cpp:
(JSC::DFG::SpeculativeJIT::emitCall):
* dfg/DFGSpeculativeJIT64.cpp:
(JSC::DFG::SpeculativeJIT::emitCall):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGSpeculativeJIT32_64cpp">trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGSpeculativeJIT64cpp">trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (179850 => 179851)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2015-02-09 23:39:41 UTC (rev 179850)
+++ trunk/Source/JavaScriptCore/ChangeLog 2015-02-09 23:39:57 UTC (rev 179851)
</span><span class="lines">@@ -1,3 +1,18 @@
</span><ins>+2015-02-09 Filip Pizlo <fpizlo@apple.com>
+
+ DFG call codegen should resolve the callee operand as late as possible
+ https://bugs.webkit.org/show_bug.cgi?id=141398
+
+ Reviewed by Mark Lam.
+
+ This is mostly a benign restructuring to help with the implementation of
+ https://bugs.webkit.org/show_bug.cgi?id=141332.
+
+ * dfg/DFGSpeculativeJIT32_64.cpp:
+ (JSC::DFG::SpeculativeJIT::emitCall):
+ * dfg/DFGSpeculativeJIT64.cpp:
+ (JSC::DFG::SpeculativeJIT::emitCall):
+
</ins><span class="cx"> 2015-02-08 Filip Pizlo <fpizlo@apple.com>
</span><span class="cx">
</span><span class="cx"> DFG should only have two mechanisms for describing effectfulness of nodes; previously there were three
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGSpeculativeJIT32_64cpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp (179850 => 179851)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp 2015-02-09 23:39:41 UTC (rev 179850)
+++ trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp 2015-02-09 23:39:57 UTC (rev 179851)
</span><span class="lines">@@ -649,10 +649,6 @@
</span><span class="cx"> CallLinkInfo::CallType callType = isCall ? CallLinkInfo::Call : CallLinkInfo::Construct;
</span><span class="cx">
</span><span class="cx"> Edge calleeEdge = m_jit.graph().m_varArgChildren[node->firstChild()];
</span><del>- JSValueOperand callee(this, calleeEdge);
- GPRReg calleeTagGPR = callee.tagGPR();
- GPRReg calleePayloadGPR = callee.payloadGPR();
- use(calleeEdge);
</del><span class="cx">
</span><span class="cx"> // The call instruction's first child is either the function (normal call) or the
</span><span class="cx"> // receiver (method call). subsequent children are the arguments.
</span><span class="lines">@@ -661,8 +657,6 @@
</span><span class="cx"> int numArgs = numPassedArgs + dummyThisArgument;
</span><span class="cx">
</span><span class="cx"> m_jit.store32(MacroAssembler::TrustedImm32(numArgs), calleeFramePayloadSlot(JSStack::ArgumentCount));
</span><del>- m_jit.store32(calleePayloadGPR, calleeFramePayloadSlot(JSStack::Callee));
- m_jit.store32(calleeTagGPR, calleeFrameTagSlot(JSStack::Callee));
</del><span class="cx">
</span><span class="cx"> for (int i = 0; i < numPassedArgs; i++) {
</span><span class="cx"> Edge argEdge = m_jit.graph().m_varArgChildren[node->firstChild() + 1 + i];
</span><span class="lines">@@ -675,6 +669,13 @@
</span><span class="cx"> m_jit.store32(argPayloadGPR, calleeArgumentPayloadSlot(i + dummyThisArgument));
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+ JSValueOperand callee(this, calleeEdge);
+ GPRReg calleeTagGPR = callee.tagGPR();
+ GPRReg calleePayloadGPR = callee.payloadGPR();
+ use(calleeEdge);
+ m_jit.store32(calleePayloadGPR, calleeFramePayloadSlot(JSStack::Callee));
+ m_jit.store32(calleeTagGPR, calleeFrameTagSlot(JSStack::Callee));
+
</ins><span class="cx"> flushRegisters();
</span><span class="cx">
</span><span class="cx"> GPRFlushedCallResult resultPayload(this);
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGSpeculativeJIT64cpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp (179850 => 179851)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp 2015-02-09 23:39:41 UTC (rev 179850)
+++ trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp 2015-02-09 23:39:57 UTC (rev 179851)
</span><span class="lines">@@ -635,10 +635,6 @@
</span><span class="cx"> CallLinkInfo::CallType callType = isCall ? CallLinkInfo::Call : CallLinkInfo::Construct;
</span><span class="cx">
</span><span class="cx"> Edge calleeEdge = m_jit.graph().m_varArgChildren[node->firstChild()];
</span><del>- JSValueOperand callee(this, calleeEdge);
- GPRReg calleeGPR = callee.gpr();
- use(calleeEdge);
-
</del><span class="cx"> // The call instruction's first child is the function; the subsequent children are the
</span><span class="cx"> // arguments.
</span><span class="cx"> int numPassedArgs = node->numChildren() - 1;
</span><span class="lines">@@ -646,7 +642,6 @@
</span><span class="cx"> int numArgs = numPassedArgs + dummyThisArgument;
</span><span class="cx">
</span><span class="cx"> m_jit.store32(MacroAssembler::TrustedImm32(numArgs), calleeFramePayloadSlot(JSStack::ArgumentCount));
</span><del>- m_jit.store64(calleeGPR, calleeFrameSlot(JSStack::Callee));
</del><span class="cx">
</span><span class="cx"> for (int i = 0; i < numPassedArgs; i++) {
</span><span class="cx"> Edge argEdge = m_jit.graph().m_varArgChildren[node->firstChild() + 1 + i];
</span><span class="lines">@@ -657,6 +652,11 @@
</span><span class="cx"> m_jit.store64(argGPR, calleeArgumentSlot(i + dummyThisArgument));
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+ JSValueOperand callee(this, calleeEdge);
+ GPRReg calleeGPR = callee.gpr();
+ use(calleeEdge);
+ m_jit.store64(calleeGPR, calleeFrameSlot(JSStack::Callee));
+
</ins><span class="cx"> flushRegisters();
</span><span class="cx">
</span><span class="cx"> GPRFlushedCallResult result(this);
</span></span></pre>
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