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<title>[170736] branches/ftlopt/Source/JavaScriptCore</title>
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<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/170736">170736</a></dd>
<dt>Author</dt> <dd>mmirman@apple.com</dd>
<dt>Date</dt> <dd>2014-07-02 16:41:08 -0700 (Wed, 02 Jul 2014)</dd>
</dl>

<h3>Log Message</h3>
<pre>Added In for cells to the 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="#branchesftloptSourceJavaScriptCoreftlFTLCompilecpp">branches/ftlopt/Source/JavaScriptCore/ftl/FTLCompile.cpp</a></li>
<li><a href="#branchesftloptSourceJavaScriptCoreftlFTLInlineCacheDescriptorh">branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheDescriptor.h</a></li>
<li><a href="#branchesftloptSourceJavaScriptCoreftlFTLInlineCacheSizecpp">branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheSize.cpp</a></li>
<li><a href="#branchesftloptSourceJavaScriptCoreftlFTLInlineCacheSizeh">branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheSize.h</a></li>
<li><a href="#branchesftloptSourceJavaScriptCoreftlFTLIntrinsicRepositoryh">branches/ftlopt/Source/JavaScriptCore/ftl/FTLIntrinsicRepository.h</a></li>
<li><a href="#branchesftloptSourceJavaScriptCoreftlFTLLowerDFGToLLVMcpp">branches/ftlopt/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp</a></li>
<li><a href="#branchesftloptSourceJavaScriptCoreftlFTLSlowPathCallcpp">branches/ftlopt/Source/JavaScriptCore/ftl/FTLSlowPathCall.cpp</a></li>
<li><a href="#branchesftloptSourceJavaScriptCoreftlFTLSlowPathCallh">branches/ftlopt/Source/JavaScriptCore/ftl/FTLSlowPathCall.h</a></li>
<li><a href="#branchesftloptSourceJavaScriptCoreftlFTLStateh">branches/ftlopt/Source/JavaScriptCore/ftl/FTLState.h</a></li>
<li><a href="#branchesftloptSourceJavaScriptCorejitJITOperationsh">branches/ftlopt/Source/JavaScriptCore/jit/JITOperations.h</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#branchesftloptSourceJavaScriptCoretestsstressftlcheckinvariablejs">branches/ftlopt/Source/JavaScriptCore/tests/stress/ftl-checkin-variable.js</a></li>
<li><a href="#branchesftloptSourceJavaScriptCoretestsstressftlcheckinjs">branches/ftlopt/Source/JavaScriptCore/tests/stress/ftl-checkin.js</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="branchesftloptSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ChangeLog (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ChangeLog        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/ChangeLog        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -271,6 +271,36 @@
</span><span class="cx">         (foo):
</span><span class="cx">         (test):
</span><span class="cx"> 
</span><ins>+2014-07-01  Matthew Mirman  &lt;mmirman@apple.com&gt;
+
+        Added an implementation of the &quot;in&quot; check to FTL.
+        https://bugs.webkit.org/show_bug.cgi?id=134508
+
+        Reviewed by Filip Pizlo.
+
+        * ftl/FTLCapabilities.cpp: enabled compilation for &quot;in&quot;
+        (JSC::FTL::canCompile): ditto
+        * ftl/FTLCompile.cpp:
+        (JSC::FTL::generateCheckInICFastPath): added.
+        (JSC::FTL::fixFunctionBasedOnStackMaps): added case for CheckIn descriptors.
+        * ftl/FTLInlineCacheDescriptor.h:
+        (JSC::FTL::CheckInGenerator::CheckInGenerator): added.
+        (JSC::FTL::CheckInDescriptor::CheckInDescriptor): added.
+        * ftl/FTLInlineCacheSize.cpp: 
+        (JSC::FTL::sizeOfCheckIn): added. Currently larger than necessary.
+        * ftl/FTLInlineCacheSize.h: ditto
+        * ftl/FTLIntrinsicRepository.h: Added function type for operationInGeneric
+        * ftl/FTLLowerDFGToLLVM.cpp: 
+        (JSC::FTL::LowerDFGToLLVM::compileNode): added case for In.
+        (JSC::FTL::LowerDFGToLLVM::compileIn): added.
+        * ftl/FTLSlowPathCall.cpp: Added a callOperation for operationIn
+        (JSC::FTL::callOperation): ditto
+        * ftl/FTLSlowPathCall.h: ditto
+        * ftl/FTLState.h: Added a vector to hold CheckIn descriptors.
+        * jit/JITOperations.h: made operationIns internal.
+        * tests/stress/ftl-checkin.js: Added.
+        * tests/stress/ftl-checkin-variable.js: Added.
+
</ins><span class="cx"> 2014-06-30  Mark Hahnenberg  &lt;mhahnenberg@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Merge r169121 from trunk.
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLCapabilitiescpp"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLCapabilities.cpp (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLCapabilities.cpp        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLCapabilities.cpp        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -165,6 +165,10 @@
</span><span class="cx">         // case because it would prevent us from catching bugs where the FTL backend
</span><span class="cx">         // pipeline failed to optimize out an Identity.
</span><span class="cx">         break;
</span><ins>+    case In:
+        if (node-&gt;child2().useKind() == CellUse)
+            break;
+        return CannotCompile;
</ins><span class="cx">     case PutByIdDirect:
</span><span class="cx">     case PutById:
</span><span class="cx">         if (node-&gt;child1().useKind() == CellUse)
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLCompilecpp"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLCompile.cpp (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLCompile.cpp        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLCompile.cpp        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -166,6 +166,68 @@
</span><span class="cx">     }
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+static void generateCheckInICFastPath(
+    State&amp; state, CodeBlock* codeBlock, GeneratedFunction generatedFunction,
+    StackMaps::RecordMap&amp; recordMap, CheckInDescriptor&amp; ic, size_t sizeOfIC)
+{
+    VM&amp; vm = state.graph.m_vm;
+
+    StackMaps::RecordMap::iterator iter = recordMap.find(ic.stackmapID());
+    if (iter == recordMap.end()) {
+        // It was optimized out.
+        return;
+    }
+    
+    Vector&lt;StackMaps::Record&gt;&amp; records = iter-&gt;value;
+    
+    RELEASE_ASSERT(records.size() == ic.m_generators.size());
+
+    for (unsigned i = records.size(); i--;) {
+        StackMaps::Record&amp; record = records[i];
+        auto generator = ic.m_generators[i];
+
+        StructureStubInfo&amp; stubInfo = *generator.m_stub;
+        auto call = generator.m_slowCall;
+        auto slowPathBegin = generator.m_beginLabel;
+
+        CCallHelpers fastPathJIT(&amp;vm, codeBlock);
+        
+        auto jump = fastPathJIT.patchableJump();
+        auto done = fastPathJIT.label();
+
+        char* startOfIC =
+            bitwise_cast&lt;char*&gt;(generatedFunction) + record.instructionOffset;
+        
+        LinkBuffer fastPath(vm, &amp;fastPathJIT, startOfIC, sizeOfIC);
+        LinkBuffer&amp; slowPath = *state.finalizer-&gt;sideCodeLinkBuffer;
+        // Note: we could handle the !isValid() case. We just don't appear to have a
+        // reason to do so, yet.
+        RELEASE_ASSERT(fastPath.isValid());
+
+        MacroAssembler::AssemblerType_T::fillNops(
+            startOfIC + fastPath.size(), sizeOfIC - fastPath.size());
+        
+        state.finalizer-&gt;sideCodeLinkBuffer-&gt;link(
+            ic.m_slowPathDone[i], CodeLocationLabel(startOfIC + sizeOfIC));
+        
+        CodeLocationLabel slowPathBeginLoc = slowPath.locationOf(slowPathBegin);
+        fastPath.link(jump, slowPathBeginLoc);
+
+        CodeLocationCall callReturnLocation = fastPath.locationOf(call);
+
+        stubInfo.patch.deltaCallToDone = MacroAssembler::differenceBetweenCodePtr(
+            callReturnLocation, fastPath.locationOf(done));
+
+        stubInfo.patch.deltaCallToJump = MacroAssembler::differenceBetweenCodePtr(
+            callReturnLocation, fastPath.locationOf(jump));
+        stubInfo.callReturnLocation = callReturnLocation;
+        stubInfo.patch.deltaCallToSlowCase = MacroAssembler::differenceBetweenCodePtr(
+            callReturnLocation, slowPathBeginLoc);
+        
+    }
+}
+
+
</ins><span class="cx"> static RegisterSet usedRegistersFor(const StackMaps::Record&amp; record)
</span><span class="cx"> {
</span><span class="cx">     if (Options::assumeAllRegsInFTLICAreLive())
</span><span class="lines">@@ -290,7 +352,7 @@
</span><span class="cx">         state.finalizer-&gt;exitThunksLinkBuffer = linkBuffer.release();
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    if (!state.getByIds.isEmpty() || !state.putByIds.isEmpty()) {
</del><ins>+    if (!state.getByIds.isEmpty() || !state.putByIds.isEmpty() || !state.checkIns.isEmpty()) {
</ins><span class="cx">         CCallHelpers slowPathJIT(&amp;vm, codeBlock);
</span><span class="cx">         
</span><span class="cx">         CCallHelpers::JumpList exceptionTarget;
</span><span class="lines">@@ -320,13 +382,13 @@
</span><span class="cx">                     JSValueRegs(result), NeedToSpill);
</span><span class="cx">                 
</span><span class="cx">                 MacroAssembler::Label begin = slowPathJIT.label();
</span><del>-                
</del><ins>+
</ins><span class="cx">                 MacroAssembler::Call call = callOperation(
</span><span class="cx">                     state, usedRegisters, slowPathJIT, getById.codeOrigin(), &amp;exceptionTarget,
</span><span class="cx">                     operationGetByIdOptimize, result, gen.stubInfo(), base, getById.uid());
</span><del>-                
</del><ins>+
</ins><span class="cx">                 gen.reportSlowPathCall(begin, call);
</span><del>-                
</del><ins>+
</ins><span class="cx">                 getById.m_slowPathDone.append(slowPathJIT.jump());
</span><span class="cx">                 getById.m_generators.append(gen);
</span><span class="cx">             }
</span><span class="lines">@@ -369,6 +431,44 @@
</span><span class="cx">                 putById.m_generators.append(gen);
</span><span class="cx">             }
</span><span class="cx">         }
</span><ins>+
+
+        for (unsigned i = state.checkIns.size(); i--;) {
+            CheckInDescriptor&amp; checkIn = state.checkIns[i];
+            
+            if (verboseCompilationEnabled())
+                dataLog(&quot;Handling checkIn stackmap #&quot;, checkIn.stackmapID(), &quot;\n&quot;);
+            
+            iter = recordMap.find(checkIn.stackmapID());
+            if (iter == recordMap.end()) {
+                // It was optimized out.
+                continue;
+            }
+            
+            for (unsigned i = 0; i &lt; iter-&gt;value.size(); ++i) {
+                StackMaps::Record&amp; record = iter-&gt;value[i];
+                RegisterSet usedRegisters = usedRegistersFor(record);
+                GPRReg result = record.locations[0].directGPR();
+                GPRReg obj = record.locations[1].directGPR();
+                StructureStubInfo* stubInfo = codeBlock-&gt;addStubInfo(); 
+                stubInfo-&gt;codeOrigin = checkIn.codeOrigin();
+                stubInfo-&gt;patch.baseGPR = static_cast&lt;int8_t&gt;(obj);
+                stubInfo-&gt;patch.valueGPR = static_cast&lt;int8_t&gt;(result);
+                stubInfo-&gt;patch.usedRegisters = usedRegisters;
+                stubInfo-&gt;patch.spillMode = NeedToSpill;
+
+                MacroAssembler::Label begin = slowPathJIT.label();
+
+                MacroAssembler::Call slowCall = callOperation(
+                    state, usedRegisters, slowPathJIT, checkIn.codeOrigin(), &amp;exceptionTarget,
+                    operationInOptimize, result, stubInfo, obj, checkIn.m_id);
+
+                checkIn.m_slowPathDone.append(slowPathJIT.jump());
+                
+                checkIn.m_generators.append(CheckInGenerator(stubInfo, slowCall, begin));
+            }
+        }
+
</ins><span class="cx">         
</span><span class="cx">         exceptionTarget.link(&amp;slowPathJIT);
</span><span class="cx">         MacroAssembler::Jump exceptionJump = slowPathJIT.jump();
</span><span class="lines">@@ -388,6 +488,12 @@
</span><span class="cx">                 state, codeBlock, generatedFunction, recordMap, state.putByIds[i],
</span><span class="cx">                 sizeOfPutById());
</span><span class="cx">         }
</span><ins>+
+        for (unsigned i = state.checkIns.size(); i--;) {
+            generateCheckInICFastPath(
+                state, codeBlock, generatedFunction, recordMap, state.checkIns[i],
+                sizeOfCheckIn()); 
+        } 
</ins><span class="cx">     }
</span><span class="cx">     
</span><span class="cx">     // Handling JS calls is weird: we need to ensure that we sort them by the PC in LLVM
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLInlineCacheDescriptorh"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheDescriptor.h (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheDescriptor.h        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheDescriptor.h        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -94,6 +94,35 @@
</span><span class="cx">     PutKind m_putKind;
</span><span class="cx"> };
</span><span class="cx"> 
</span><ins>+struct CheckInGenerator {
+    StructureStubInfo* m_stub;
+    MacroAssembler::Call m_slowCall;
+    MacroAssembler::Label m_beginLabel;
+
+    CheckInGenerator(StructureStubInfo* stub, MacroAssembler::Call slowCall, MacroAssembler::Label beginLabel)
+        : m_stub(stub) 
+        , m_slowCall(slowCall)
+        , m_beginLabel(beginLabel)
+    {
+    }
+};
+
+class CheckInDescriptor : public InlineCacheDescriptor {
+public:
+    CheckInDescriptor() { }
+    
+    CheckInDescriptor(unsigned stackmapID, CodeOrigin codeOrigin, const StringImpl* id)
+        : InlineCacheDescriptor(stackmapID, codeOrigin, nullptr)
+        , m_id(id)
+    {
+    }
+
+    
+    const StringImpl* m_id;
+    Vector&lt;CheckInGenerator&gt; m_generators;
+};
+
+
</ins><span class="cx"> } } // namespace JSC::FTL
</span><span class="cx"> 
</span><span class="cx"> #endif // ENABLE(FTL_JIT)
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLInlineCacheSizecpp"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheSize.cpp (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheSize.cpp        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheSize.cpp        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -61,6 +61,16 @@
</span><span class="cx"> #endif
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+size_t sizeOfCheckIn()
+{
+#if CPU(ARM64)
+    return 4;
+#else
+    return 5; 
+#endif
+}
+
+
</ins><span class="cx"> size_t sizeOfCall()
</span><span class="cx"> {
</span><span class="cx"> #if CPU(ARM64)
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLInlineCacheSizeh"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheSize.h (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheSize.h        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLInlineCacheSize.h        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -33,6 +33,7 @@
</span><span class="cx"> size_t sizeOfGetById();
</span><span class="cx"> size_t sizeOfPutById();
</span><span class="cx"> size_t sizeOfCall();
</span><ins>+size_t sizeOfCheckIn();
</ins><span class="cx"> 
</span><span class="cx"> } } // namespace JSC::FTL
</span><span class="cx"> 
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLIntrinsicRepositoryh"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLIntrinsicRepository.h (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLIntrinsicRepository.h        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLIntrinsicRepository.h        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -63,6 +63,7 @@
</span><span class="cx">     macro(J_JITOperation_E, functionType(int64, intPtr)) \
</span><span class="cx">     macro(J_JITOperation_EA, functionType(int64, intPtr, intPtr)) \
</span><span class="cx">     macro(J_JITOperation_EAZ, functionType(int64, intPtr, intPtr, int32)) \
</span><ins>+    macro(J_JITOperation_ECJ, functionType(int64, intPtr, intPtr, int64)) \
</ins><span class="cx">     macro(J_JITOperation_EDA, functionType(int64, intPtr, doubleType, intPtr)) \
</span><span class="cx">     macro(J_JITOperation_EJ, functionType(int64, intPtr, int64)) \
</span><span class="cx">     macro(J_JITOperation_EJA, functionType(int64, intPtr, int64, intPtr)) \
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLLowerDFGToLLVMcpp"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -478,6 +478,9 @@
</span><span class="cx">             compileGetById();
</span><span class="cx">             break;
</span><span class="cx">         case PutByIdDirect:
</span><ins>+        case In:
+            compileIn();
+            break;
</ins><span class="cx">         case PutById:
</span><span class="cx">             compilePutById();
</span><span class="cx">             break;
</span><span class="lines">@@ -3930,6 +3933,33 @@
</span><span class="cx">         setBoolean(m_out.notNull(pointerResult));
</span><span class="cx">     }
</span><span class="cx">     
</span><ins>+    void compileIn()
+    {
+        Edge base = m_node-&gt;child2();
+        LValue cell = lowCell(base);
+        speculateObject(base, cell);
+        if (JSString* string = m_node-&gt;child1()-&gt;dynamicCastConstant&lt;JSString*&gt;()) {
+            if (string-&gt;tryGetValueImpl() &amp;&amp; string-&gt;tryGetValueImpl()-&gt;isAtomic()) {
+
+                const StringImpl* str = string-&gt;tryGetValueImpl();
+                unsigned stackmapID = m_stackmapIDs++;
+            
+                LValue call = m_out.call(
+                    m_out.patchpointInt64Intrinsic(),
+                    m_out.constInt64(stackmapID), m_out.constInt32(sizeOfCheckIn()),
+                    constNull(m_out.ref8), m_out.constInt32(1), cell);
+
+                setInstructionCallingConvention(call, LLVMAnyRegCallConv);
+
+                m_ftlState.checkIns.append(CheckInDescriptor(stackmapID, m_node-&gt;origin.semantic, str));
+                setJSValue(call);
+                return;
+            }
+        } 
+
+        setJSValue(vmCall(m_out.operation(operationGenericIn), m_callFrame, cell, lowJSValue(m_node-&gt;child1())));
+    }
+
</ins><span class="cx">     void compileCheckHasInstance()
</span><span class="cx">     {
</span><span class="cx">         speculate(
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLSlowPathCallcpp"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLSlowPathCall.cpp (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLSlowPathCall.cpp        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLSlowPathCall.cpp        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -176,6 +176,19 @@
</span><span class="cx"> MacroAssembler::Call callOperation(
</span><span class="cx">     State&amp; state, const RegisterSet&amp; usedRegisters, CCallHelpers&amp; jit,
</span><span class="cx">     CodeOrigin codeOrigin, MacroAssembler::JumpList* exceptionTarget,
</span><ins>+    J_JITOperation_ESsiCI operation, GPRReg result, StructureStubInfo* stubInfo,
+    GPRReg object, const StringImpl* uid)
+{
+    storeCodeOrigin(state, jit, codeOrigin);
+    CallContext context(state, usedRegisters, jit, 4, result);
+    jit.setupArgumentsWithExecState(
+        CCallHelpers::TrustedImmPtr(stubInfo), object, CCallHelpers::TrustedImmPtr(uid));
+    return context.makeCall(bitwise_cast&lt;void*&gt;(operation), exceptionTarget);
+}
+
+MacroAssembler::Call callOperation(
+    State&amp; state, const RegisterSet&amp; usedRegisters, CCallHelpers&amp; jit,
+    CodeOrigin codeOrigin, MacroAssembler::JumpList* exceptionTarget,
</ins><span class="cx">     J_JITOperation_ESsiJI operation, GPRReg result, StructureStubInfo* stubInfo,
</span><span class="cx">     GPRReg object, StringImpl* uid)
</span><span class="cx"> {
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLSlowPathCallh"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLSlowPathCall.h (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLSlowPathCall.h        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLSlowPathCall.h        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -59,6 +59,10 @@
</span><span class="cx"> 
</span><span class="cx"> MacroAssembler::Call callOperation(
</span><span class="cx">     State&amp;, const RegisterSet&amp;, CCallHelpers&amp;, CodeOrigin, CCallHelpers::JumpList*,
</span><ins>+    J_JITOperation_ESsiCI, GPRReg, StructureStubInfo*, GPRReg,
+    const StringImpl*);
+MacroAssembler::Call callOperation(
+    State&amp;, const RegisterSet&amp;, CCallHelpers&amp;, CodeOrigin, CCallHelpers::JumpList*,
</ins><span class="cx">     J_JITOperation_ESsiJI, GPRReg result, StructureStubInfo*, GPRReg object,
</span><span class="cx">     StringImpl* uid);
</span><span class="cx"> MacroAssembler::Call callOperation(
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoreftlFTLStateh"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/ftl/FTLState.h (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/ftl/FTLState.h        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/ftl/FTLState.h        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -73,6 +73,7 @@
</span><span class="cx">     unsigned capturedStackmapID;
</span><span class="cx">     SegmentedVector&lt;GetByIdDescriptor&gt; getByIds;
</span><span class="cx">     SegmentedVector&lt;PutByIdDescriptor&gt; putByIds;
</span><ins>+    SegmentedVector&lt;CheckInDescriptor&gt; checkIns;
</ins><span class="cx">     Vector&lt;JSCall&gt; jsCalls;
</span><span class="cx">     Vector&lt;CString&gt; codeSectionNames;
</span><span class="cx">     Vector&lt;CString&gt; dataSectionNames;
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCorejitJITOperationsh"></a>
<div class="modfile"><h4>Modified: branches/ftlopt/Source/JavaScriptCore/jit/JITOperations.h (170735 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/jit/JITOperations.h        2014-07-02 23:02:45 UTC (rev 170735)
+++ branches/ftlopt/Source/JavaScriptCore/jit/JITOperations.h        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -201,9 +201,9 @@
</span><span class="cx"> EncodedJSValue JIT_OPERATION operationGetById(ExecState*, StructureStubInfo*, EncodedJSValue, StringImpl*) WTF_INTERNAL;
</span><span class="cx"> EncodedJSValue JIT_OPERATION operationGetByIdBuildList(ExecState*, StructureStubInfo*, EncodedJSValue, StringImpl*) WTF_INTERNAL;
</span><span class="cx"> EncodedJSValue JIT_OPERATION operationGetByIdOptimize(ExecState*, StructureStubInfo*, EncodedJSValue, StringImpl*) WTF_INTERNAL;
</span><del>-EncodedJSValue JIT_OPERATION operationInOptimize(ExecState*, StructureStubInfo*, JSCell*, StringImpl*);
-EncodedJSValue JIT_OPERATION operationIn(ExecState*, StructureStubInfo*, JSCell*, StringImpl*);
-EncodedJSValue JIT_OPERATION operationGenericIn(ExecState*, JSCell*, EncodedJSValue);
</del><ins>+EncodedJSValue JIT_OPERATION operationInOptimize(ExecState*, StructureStubInfo*, JSCell*, StringImpl*) WTF_INTERNAL;
+EncodedJSValue JIT_OPERATION operationIn(ExecState*, StructureStubInfo*, JSCell*, StringImpl*) WTF_INTERNAL;
+EncodedJSValue JIT_OPERATION operationGenericIn(ExecState*, JSCell*, EncodedJSValue) WTF_INTERNAL;
</ins><span class="cx"> EncodedJSValue JIT_OPERATION operationCallGetter(ExecState*, JSCell*, JSCell*) WTF_INTERNAL;
</span><span class="cx"> void JIT_OPERATION operationPutByIdStrict(ExecState*, StructureStubInfo*, EncodedJSValue encodedValue, EncodedJSValue encodedBase, StringImpl*) WTF_INTERNAL;
</span><span class="cx"> void JIT_OPERATION operationPutByIdNonStrict(ExecState*, StructureStubInfo*, EncodedJSValue encodedValue, EncodedJSValue encodedBase, StringImpl*) WTF_INTERNAL;
</span></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoretestsstressftlcheckinvariablejs"></a>
<div class="addfile"><h4>Added: branches/ftlopt/Source/JavaScriptCore/tests/stress/ftl-checkin-variable.js (0 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/tests/stress/ftl-checkin-variable.js                                (rev 0)
+++ branches/ftlopt/Source/JavaScriptCore/tests/stress/ftl-checkin-variable.js        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -0,0 +1,17 @@
</span><ins>+function foo(l,x){
+    var t = l in x; 
+    return t;
+}
+
+noInline(foo);
+
+var r;
+for (var i = 0; i &lt; 1000000; ++i) {
+    var z = { 'y' : i, 's' : i + 1 };
+    z.s = 10;
+    r = foo(&quot;s&quot;,z);
+}
+
+if (!r) {
+    print (&quot;Error: &quot; + r);
+}
</ins></span></pre></div>
<a id="branchesftloptSourceJavaScriptCoretestsstressftlcheckinjs"></a>
<div class="addfile"><h4>Added: branches/ftlopt/Source/JavaScriptCore/tests/stress/ftl-checkin.js (0 => 170736)</h4>
<pre class="diff"><span>
<span class="info">--- branches/ftlopt/Source/JavaScriptCore/tests/stress/ftl-checkin.js                                (rev 0)
+++ branches/ftlopt/Source/JavaScriptCore/tests/stress/ftl-checkin.js        2014-07-02 23:41:08 UTC (rev 170736)
</span><span class="lines">@@ -0,0 +1,17 @@
</span><ins>+function foo(x){
+    var t = &quot;s&quot; in x; 
+    return t;
+}
+
+noInline(foo);
+
+var r;
+for (var i = 0; i &lt; 1000000; ++i) {
+    var z = { 'y' : i, 's' : i + 1 };
+    z.s = 10;
+    r = foo(z);
+}
+
+if (!r) {
+    print (&quot;Error: &quot; + r);
+}
</ins></span></pre>
</div>
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