Bug 130069

Summary: ASSERTION FAILED: node->op() == Phi || node->op() == SetArgument
Product: WebKit Reporter: Ryosuke Niwa <rniwa>
Component: JavaScriptCoreAssignee: Filip Pizlo <fpizlo>
Status: RESOLVED FIXED    
Severity: Normal CC: fpizlo, ggaren, mhahnenberg
Priority: P2    
Version: 528+ (Nightly build)   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on:    
Bug Blocks: 130106, 130115    
Attachments:
Description Flags
the patch
none
the patch
none
the patch ggaren: review+

Ryosuke Niwa
Reported 2014-03-10 22:43:48 PDT
Tools/Scripts/run-perf-tests PerformanceTests/DoYouEvenBench/Full.html --test-runner-count=4 --reset-results --debug hits the following assertion ASSERTION FAILED: node->op() == Phi || node->op() == SetArgument /Volumes/Data/webkit/Source/JavaScriptCore/dfg/DFGDCEPhase.cpp(262) : void JSC::DFG::DCEPhase::cleanVariables(VariablesVectorType &) [VariablesVectorType = JSC::Operands<JSC::DFG::Node *, JSC::DFG::NodePointerTraits>] 1 0x1067dc750 WTFCrash 2 0x1062728e1 void JSC::DFG::DCEPhase::cleanVariables<JSC::Operands<JSC::DFG::Node*, JSC::DFG::NodePointerTraits> >(JSC::Operands<JSC::DFG::Node*, JSC::DFG::NodePointerTraits>&) 3 0x1062722d0 JSC::DFG::DCEPhase::fixupBlock(JSC::DFG::BasicBlock*) 4 0x106271e2e JSC::DFG::DCEPhase::run() 5 0x106271005 bool JSC::DFG::runAndLog<JSC::DFG::DCEPhase>(JSC::DFG::DCEPhase&) 6 0x106270f8e bool JSC::DFG::runPhase<JSC::DFG::DCEPhase>(JSC::DFG::Graph&) 7 0x106270f48 JSC::DFG::performDCE(JSC::DFG::Graph&) 8 0x106326f40 JSC::DFG::Plan::compileInThreadImpl(JSC::DFG::LongLivedState&) 9 0x106326674 JSC::DFG::Plan::compileInThread(JSC::DFG::LongLivedState&, JSC::DFG::ThreadData*) 10 0x1063c9ac0 JSC::DFG::Worklist::runThread(JSC::DFG::ThreadData*) 11 0x1063c8714 JSC::DFG::Worklist::threadFunction(void*) 12 0x10682bf70 WTF::threadEntryPoint(void*) 13 0x10682cbf8 WTF::wtfThreadEntryPoint(void*) 14 0x7fff8f8d4899 _pthread_body 15 0x7fff8f8d472a _pthread_struct_init 16 0x7fff8f8d8fc9 thread_start
Attachments
the patch (3.92 KB, patch)
2014-03-10 23:51 PDT, Filip Pizlo 		no flags
DetailsFormatted DiffDiff
the patch (10.84 KB, patch)
2014-03-11 21:47 PDT, Filip Pizlo 		no flags
DetailsFormatted DiffDiff
the patch (14.22 KB, patch)
2014-03-11 21:56 PDT, Filip Pizlo 		ggaren: review+
DetailsFormatted DiffDiff
Show Obsolete (2) View All Add attachment proposed patch, testcase, etc.
Ryosuke Niwa
Comment 1 2014-03-10 22:44:56 PDT
I've added instrumentation suggested in https://bugs.webkit.org/show_bug.cgi?id=130066#c7 as Index: Source/JavaScriptCore/dfg/DFGDCEPhase.cpp =================================================================== --- Source/JavaScriptCore/dfg/DFGDCEPhase.cpp (revision 165407) +++ Source/JavaScriptCore/dfg/DFGDCEPhase.cpp (working copy) @@ -259,6 +259,11 @@ continue; if (node->op() == GetLocal) { node = node->child1().node(); + if (!(node->op() == Phi || node->op() == SetArgument)) { + m_graph.dump(); + fputs("\n\n\n\n\n", stderr); + dataLog("node = ", node, "\n"); + } ASSERT(node->op() == Phi || node->op() == SetArgument); if (node->shouldGenerate()) { variables[i] = node; but Graph::dump itself crashes hitting another assertion: DFG for adapterDidCommit#<no-hash>:[0x7fe40a014860->0x7fe4064996a0->0x113b19470, DFGFunctionCall, 192]: Fixpoint state: FixpointConverged; Form: ThreadedCPS; Unification state: GloballyUnified; Ref count state: EverythingIsLive Block #0 (bc#0): (OSR target) Predecessors: Dominated by: #0 Dominates: #0 #1 #2 #6 #7 #8 #9 #10 #14 #15 #16 vars before: arg1:(Top, TOP, TOP, TOP) arg0:(Top, TOP, TOP, TOP) var links: arg1:@1 arg0:@0 0: < 1:-> SetArgument(arg0(a), W:SideState, bc#0) predicting Final 1: < 3:-> SetArgument(arg1(B~<Other>/FlushedJSValue), W:SideState, bc#0) predicting Other 2: < 3:-> GetLocal(@0, JS|UseAsOther, Final, arg0(a), R:Variables(6), bc#1) predicting Final 3: <!0:-> Phantom(Check:FinalObject:@2<Final>, MustGen|CanExit, Final, bc#1) 4: skipped < 0:-> MovHint(@2<Final>, arg0, W:SideState, bc#1) 5: < 2:-> SetLocal(Cell:@2<Final>, arg0(C<Final>/FlushedCell), W:Variables(6), bc#4) predicting Final 6: <!0:-> FunctionReentryWatchpoint(MustGen, R:Watchpoint_fire, bc#4) 7: < 2:-> WeakJSConstant(JS|UseAsOther, Otherobj, 0x1131b8930 (%DE:JSActivation), bc#4) 8: skipped < 0:-> MovHint(@7<Object>, loc5, W:SideState, bc#4) 9: <!0:-> Phantom(MustGen|CanExit, bc#10) 10: <!0:-> Phantom(@7<Object>, MustGen, bc#10) 11: <!0:-> VariableWatchpoint(MustGen|CanExit, 0x7fe4062d6b80, R:Watchpoint_fire, W:SideState, bc#10) 12: < 1:-> WeakJSConstant(JS|UseAsOther, Function, 0x113048030 (%Ct:Function), bc#10) 13: skipped < 0:-> MovHint(@12<Function>, loc0, W:SideState, bc#10) 14: <!0:-> Phantom(MustGen|CanExit, bc#18) 15: skipped < 0:-> MovHint(@2<Final>, loc4, W:SideState, bc#18) 16: <!0:-> Phantom(MustGen|CanExit, bc#21) 17: < 1:-> JSConstant(JS|UseAsOther, Stringident, $0 = String (identifier): isError, ID: 5, bc#21) 18: skipped < 0:-> MovHint(@17<StringIdent>, loc3, W:SideState, bc#21) 19: <!0:-> Phantom(MustGen|CanExit, bc#24) 20: < 1:-> JSConstant(JS|UseAsOther, Bool, $1 = False, bc#24) 21: skipped < 0:-> MovHint(@20<Boolean>, loc2, W:SideState, bc#24) 22: <!0:-> Phantom(MustGen|CanExit, bc#27) 23: <!0:-> Call(@12<Function>, @7<Object>, @2<Final>, @17<StringIdent>, @20<Boolean>, JS|MustGen|VarArgs|Clobbers|PureInt|CanExit, Bool, R:World, W:World, bc#27) predicting Bool 24: skipped < 0:-> MovHint(@23<Boolean>, loc0, W:SideState, bc#27) 364: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#36) 25: <!0:-> Phantom(MustGen|CanExit, bc#36) 26: < 1:-> GetLocal(@1, JS|UseAsOther, Other, arg1(B~<Other>/FlushedJSValue), R:Variables(7), bc#36) predicting Other 27: <!0:-> Branch(Check:ObjectOrOther:@26<Other>, MustGen|CanExit, T:#1, F:#2, W:SideState, bc#36) vars after: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) loc0:(Top, TOP, TOP, TOP) loc2:(Bool, False) loc3:(Stringident, TOP, TOP, [%Ch:string], String (identifier): isError, ID: 5) loc4:(Final, TOP, TOP, TOP) loc5:(Otherobj, TOP, TOP, [%DE:JSActivation], Cell: 0x1131b8930 (%DE:JSActivation), ID: 489) var links: arg1:@26<Other> arg0:@5 Block #1 (bc#39): Predecessors: #0 Dominated by: #0 #1 Dominates: #1 Phi Nodes: @449<2>->(@1), @470<2>->(@5) vars before: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) var links: arg1:@449 arg0:@470 28: < 1:-> GetLocal(@449, JS|UseAsOther, Other, arg1(B~<Other>/FlushedJSValue), R:Variables(7), bc#39) predicting Other 29: < 2:-> GetLocal(@470, JS|UseAsOther, Final, arg0(C<Final>/FlushedCell), R:Variables(6), bc#39) predicting Final 30: <!0:-> ForceOSRExit(MustGen|CanExit, W:SideState, bc#39) 489: <!0:-> StoreBarrier(Check:Cell:@29<Final>, MustGen|CanExit, R:BarrierState, W:BarrierState, bc#39) 31: <!0:-> PutById(Check:Cell:@29<Final>, @28<Other>, MustGen|Clobbers|CanExit, id1{_data}, R:World, W:World, bc#39) 510: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#48) 32: <!0:-> Jump(MustGen|CanExit, T:#6, W:SideState, bc#48) vars after: var links: arg1:@28<Other> arg0:@29<Final> Block #2 (bc#50): Predecessors: #0 Dominated by: #0 #2 Dominates: #2 Phi Nodes: @448<2>->(@5), @457<1>->(@1) vars before: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) var links: arg1:@457 arg0:@448 33: < 4:-> WeakJSConstant(JS|UseAsOther, Otherobj, 0x11212e870 (%CR:Window), bc#50) 34: skipped < 0:-> MovHint(@33<Object>, loc3, W:SideState, bc#50) 35: skipped < 0:-> SetLocal(@33<Object>, loc3(L~<Object>/FlushedJSValue), W:Variables(-4), bc#56) 36: <!0:-> StructureTransitionWatchpoint(Cell:@33<Object>, MustGen|CanExit, %CR:Window, R:JSCell_structureID, bc#56) 37: <!0:-> Phantom(@33<Object>, MustGen, bc#56) 38: < 1:-> GetButterfly(Cell:@33<Object>, Storage|UseAsOther, Other, R:JSObject_butterfly, bc#56) 39: < 4:-> GetByOffset(@38<Other>, KnownCell:@33<Object>, JS|UseAsOther, Final, id2{Ember}, 152, R:NamedProperties(2), bc#56) predicting Final 40: skipped < 0:-> MovHint(@39<Final>, loc3, W:SideState, bc#56) 41: skipped < 0:-> SetLocal(@39<Final>, loc3(M~<Final>/FlushedJSValue), W:Variables(-4), bc#64) 42: <!0:-> CheckStructure(Check:Cell:@39<Final>, MustGen|CanExit, [%BN:Object], R:JSCell_structureID, bc#64) 43: < 1:-> GetButterfly(Cell:@39<Final>, Storage|UseAsOther, Other, R:JSObject_butterfly, bc#64) 44: < 1:-> GetByOffset(@43<Other>, KnownCell:@39<Final>, JS|UseAsOther, Function, id3{mixin}, 218, R:NamedProperties(3), bc#64) predicting Function 45: skipped < 0:-> MovHint(@44<Function>, loc0, W:SideState, bc#64) 46: skipped < 0:-> SetLocal(@44<Function>, loc0(N~<Function>/FlushedJSValue), W:Variables(-1), bc#73) 47: < 2:-> GetLocal(@448, JS|UseAsOther, Final, arg0(C<Final>/FlushedCell), R:Variables(6), bc#73) predicting Final 48: <!1:-> GetById(Cell:@47<Final>, JS|MustGen|Clobbers|UseAsOther|CanExit, Final, id1{_data}, R:World, W:World, bc#73) predicting Final 49: skipped < 0:-> MovHint(@48<Final>, loc2, W:SideState, bc#73) 508: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#82) 50: < 2:-> SetLocal(@48<Final>, loc2(P*<Final>/FlushedJSValue), W:Variables(-3), bc#82) predicting Final 51: <!1:-> GetById(Cell:@47<Final>, JS|MustGen|Clobbers|UseAsOther|CanExit, Final, id4{_inFlightAttributes}, R:World, W:World, bc#82) predicting Final 52: skipped < 0:-> MovHint(@51<Final>, loc1, W:SideState, bc#82) 509: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#91) 53: < 1:-> SetLocal(@51<Final>, loc1(Q*<Final>/FlushedJSValue), W:Variables(-2), bc#91) predicting Final 54: <!0:-> CheckFunction(Check:Cell:@44<Function>, @39<Final>, MustGen|CanExit, function(0x113044430, mixin#ASSERTION FAILED: isSafeToComputeHash() /Volumes/Data/webkit3/Source/JavaScriptCore/bytecode/CodeBlock.cpp(102) : JSC::CodeBlockHash JSC::CodeBlock::hash() const 1 0x1018e34b0 WTFCrash 2 0x101247a97 JSC::CodeBlock::hash() const 3 0x1014ef4fe JSC::FunctionExecutableDump::dump(WTF::PrintStream&) const 4 0x1013b683d void WTF::printInternal<JSC::FunctionExecutableDump>(WTF::PrintStream&, JSC::FunctionExecutableDump const&) 5 0x1013aab3d void WTF::PrintStream::print<JSC::FunctionExecutableDump>(JSC::FunctionExecutableDump const&) 6 0x1013a5d16 JSC::DFG::Graph::dump(WTF::PrintStream&, char const*, JSC::DFG::Node*, JSC::DumpContext*) 7 0x1013a80a4 JSC::DFG::Graph::dump(WTF::PrintStream&, JSC::DumpContext*) 8 0x1013795bb void JSC::DFG::DCEPhase::cleanVariables<JSC::Operands<JSC::DFG::Node*, JSC::DFG::NodePointerTraits> >(JSC::Operands<JSC::DFG::Node*, JSC::DFG::NodePointerTraits>&) 9 0x101378e40 JSC::DFG::DCEPhase::fixupBlock(JSC::DFG::BasicBlock*) 10 0x10137899e JSC::DFG::DCEPhase::run() 11 0x101377b75 bool JSC::DFG::runAndLog<JSC::DFG::DCEPhase>(JSC::DFG::DCEPhase&) 12 0x101377afe bool JSC::DFG::runPhase<JSC::DFG::DCEPhase>(JSC::DFG::Graph&) 13 0x101377ab8 JSC::DFG::performDCE(JSC::DFG::Graph&) 14 0x10142dca0 JSC::DFG::Plan::compileInThreadImpl(JSC::DFG::LongLivedState&) 15 0x10142d3d4 JSC::DFG::Plan::compileInThread(JSC::DFG::LongLivedState&, JSC::DFG::ThreadData*) 16 0x1014d0820 JSC::DFG::Worklist::runThread(JSC::DFG::ThreadData*) 17 0x1014cf474 JSC::DFG::Worklist::threadFunction(void*) 18 0x101932cd0 WTF::threadEntryPoint(void*) 19 0x101933958 WTF::wtfThreadEntryPoint(void*) 20 0x7fff8f8d4899 _pthread_body 21 0x7fff8f8d472a _pthread_struct_init 22 0x7fff8f8d8fc9 thread_start
Mark Hahnenberg
Comment 2 2014-03-10 22:46:15 PDT
As Phil suggested, you can get around that ASSERT by setting the following environment variable: JSC_alwaysComputeHash=true
Ryosuke Niwa
Comment 3 2014-03-10 22:49:55 PDT
(In reply to comment #2) > As Phil suggested, you can get around that ASSERT by setting the following environment variable: > > JSC_alwaysComputeHash=true Thanks. Will do that. Just saw what this assertion is about.
Mark Hahnenberg
Comment 4 2014-03-10 23:00:20 PDT
(In reply to comment #3) > (In reply to comment #2) > > As Phil suggested, you can get around that ASSERT by setting the following environment variable: > > > > JSC_alwaysComputeHash=true > > Thanks. Will do that. Just saw what this assertion is about. Just finished rebuilding (accidentally svn upped and had to rebuild the world :-S ). Here's the full dump: node = @50 DFG for adapterDidCommit#EP3AeT:[0x7ff93cb416d0->0x7ff931f8ac40->0x124fdc470, DFGFunctionCall, 192]: Fixpoint state: FixpointConverged; Form: ThreadedCPS; Unification state: GloballyUnified; Ref count state: EverythingIsLive Block #0 (bc#0): (OSR target) Predecessors: Dominated by: #0 Dominates: #0 #1 #2 #6 #7 #8 #9 #10 #14 #15 #16 vars before: arg1:(Top, TOP, TOP, TOP) arg0:(Top, TOP, TOP, TOP) var links: arg1:@1 arg0:@0 0: < 1:-> SetArgument(arg0(a), W:SideState, bc#0) predicting Final 1: < 3:-> SetArgument(arg1(B~<Other>/FlushedJSValue), W:SideState, bc#0) predicting Other 2: < 3:-> GetLocal(@0, JS|UseAsOther, Final, arg0(a), R:Variables(6), bc#1) predicting Final 3: <!0:-> Phantom(Check:FinalObject:@2<Final>, MustGen|CanExit, Final, bc#1) 4: skipped < 0:-> MovHint(@2<Final>, arg0, W:SideState, bc#1) 5: < 2:-> SetLocal(Cell:@2<Final>, arg0(C<Final>/FlushedCell), W:Variables(6), bc#4) predicting Final 6: <!0:-> FunctionReentryWatchpoint(MustGen, R:Watchpoint_fire, bc#4) 7: < 2:-> WeakJSConstant(JS|UseAsOther, Otherobj, 0x124ff87f0 (%EL:JSActivation), bc#4) 8: skipped < 0:-> MovHint(@7<Object>, loc5, W:SideState, bc#4) 9: <!0:-> Phantom(MustGen|CanExit, bc#10) 10: <!0:-> Phantom(@7<Object>, MustGen, bc#10) 11: <!0:-> VariableWatchpoint(MustGen|CanExit, 0x7ff93384e3a0, R:Watchpoint_fire, W:SideState, bc#10) 12: < 1:-> WeakJSConstant(JS|UseAsOther, Function, 0x1250cddb0 (%CK:Function), bc#10) 13: skipped < 0:-> MovHint(@12<Function>, loc0, W:SideState, bc#10) 14: <!0:-> Phantom(MustGen|CanExit, bc#18) 15: skipped < 0:-> MovHint(@2<Final>, loc4, W:SideState, bc#18) 16: <!0:-> Phantom(MustGen|CanExit, bc#21) 17: < 1:-> JSConstant(JS|UseAsOther, Stringident, $0 = String (identifier): isError, ID: 5, bc#21) 18: skipped < 0:-> MovHint(@17<StringIdent>, loc3, W:SideState, bc#21) 19: <!0:-> Phantom(MustGen|CanExit, bc#24) 20: < 1:-> JSConstant(JS|UseAsOther, Bool, $1 = False, bc#24) 21: skipped < 0:-> MovHint(@20<Boolean>, loc2, W:SideState, bc#24) 22: <!0:-> Phantom(MustGen|CanExit, bc#27) 23: <!0:-> Call(@12<Function>, @7<Object>, @2<Final>, @17<StringIdent>, @20<Boolean>, JS|MustGen|VarArgs|Clobbers|PureInt|CanExit, Bool, R:World, W:World, bc#27) predicting Bool 24: skipped < 0:-> MovHint(@23<Boolean>, loc0, W:SideState, bc#27) 364: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#36) 25: <!0:-> Phantom(MustGen|CanExit, bc#36) 26: < 1:-> GetLocal(@1, JS|UseAsOther, Other, arg1(B~<Other>/FlushedJSValue), R:Variables(7), bc#36) predicting Other 27: <!0:-> Branch(Check:ObjectOrOther:@26<Other>, MustGen|CanExit, T:#1, F:#2, W:SideState, bc#36) vars after: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) loc0:(Top, TOP, TOP, TOP) loc2:(Bool, False) loc3:(Stringident, TOP, TOP, [%Dw:string], String (identifier): isError, ID: 5) loc4:(Final, TOP, TOP, TOP) loc5:(Otherobj, TOP, TOP, [%EL:JSActivation], Cell: 0x124ff87f0 (%EL:JSActivation), ID: 1074) var links: arg1:@26<Other> arg0:@5 Block #1 (bc#39): Predecessors: #0 Dominated by: #0 #1 Dominates: #1 Phi Nodes: @449<2>->(@1), @470<2>->(@5) vars before: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) var links: arg1:@449 arg0:@470 28: < 1:-> GetLocal(@449, JS|UseAsOther, Other, arg1(B~<Other>/FlushedJSValue), R:Variables(7), bc#39) predicting Other 29: < 2:-> GetLocal(@470, JS|UseAsOther, Final, arg0(C<Final>/FlushedCell), R:Variables(6), bc#39) predicting Final 30: <!0:-> ForceOSRExit(MustGen|CanExit, W:SideState, bc#39) 489: <!0:-> StoreBarrier(Check:Cell:@29<Final>, MustGen|CanExit, R:BarrierState, W:BarrierState, bc#39) 31: <!0:-> PutById(Check:Cell:@29<Final>, @28<Other>, MustGen|Clobbers|CanExit, id1{_data}, R:World, W:World, bc#39) 510: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#48) 32: <!0:-> Jump(MustGen|CanExit, T:#6, W:SideState, bc#48) vars after: var links: arg1:@28<Other> arg0:@29<Final> Block #2 (bc#50): Predecessors: #0 Dominated by: #0 #2 Dominates: #2 Phi Nodes: @448<2>->(@5), @457<1>->(@1) vars before: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) var links: arg1:@457 arg0:@448 33: < 4:-> WeakJSConstant(JS|UseAsOther, Otherobj, 0x11449d670 (%Eg:Window), bc#50) 34: skipped < 0:-> MovHint(@33<Object>, loc3, W:SideState, bc#50) 35: skipped < 0:-> SetLocal(@33<Object>, loc3(L~<Object>/FlushedJSValue), W:Variables(-4), bc#56) 36: <!0:-> StructureTransitionWatchpoint(Cell:@33<Object>, MustGen|CanExit, %Eg:Window, R:JSCell_structureID, bc#56) 37: <!0:-> Phantom(@33<Object>, MustGen, bc#56) 38: < 1:-> GetButterfly(Cell:@33<Object>, Storage|UseAsOther, Other, R:JSObject_butterfly, bc#56) 39: < 4:-> GetByOffset(@38<Other>, KnownCell:@33<Object>, JS|UseAsOther, Final, id2{Ember}, 141, R:NamedProperties(2), bc#56) predicting Final 40: skipped < 0:-> MovHint(@39<Final>, loc3, W:SideState, bc#56) 41: skipped < 0:-> SetLocal(@39<Final>, loc3(M~<Final>/FlushedJSValue), W:Variables(-4), bc#64) 42: <!0:-> CheckStructure(Check:Cell:@39<Final>, MustGen|CanExit, [%Bm:Object], R:JSCell_structureID, bc#64) 43: < 1:-> GetButterfly(Cell:@39<Final>, Storage|UseAsOther, Other, R:JSObject_butterfly, bc#64) 44: < 1:-> GetByOffset(@43<Other>, KnownCell:@39<Final>, JS|UseAsOther, Function, id3{mixin}, 218, R:NamedProperties(3), bc#64) predicting Function 45: skipped < 0:-> MovHint(@44<Function>, loc0, W:SideState, bc#64) 46: skipped < 0:-> SetLocal(@44<Function>, loc0(N~<Function>/FlushedJSValue), W:Variables(-1), bc#73) 47: < 2:-> GetLocal(@448, JS|UseAsOther, Final, arg0(C<Final>/FlushedCell), R:Variables(6), bc#73) predicting Final 48: <!1:-> GetById(Cell:@47<Final>, JS|MustGen|Clobbers|UseAsOther|CanExit, Final, id1{_data}, R:World, W:World, bc#73) predicting Final 49: skipped < 0:-> MovHint(@48<Final>, loc2, W:SideState, bc#73) 508: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#82) 50: < 2:-> SetLocal(@48<Final>, loc2(P*<Final>/FlushedJSValue), W:Variables(-3), bc#82) predicting Final 51: <!1:-> GetById(Cell:@47<Final>, JS|MustGen|Clobbers|UseAsOther|CanExit, Final, id4{_inFlightAttributes}, R:World, W:World, bc#82) predicting Final 52: skipped < 0:-> MovHint(@51<Final>, loc1, W:SideState, bc#82) 509: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#91) 53: < 1:-> SetLocal(@51<Final>, loc1(Q*<Final>/FlushedJSValue), W:Variables(-2), bc#91) predicting Final 54: <!0:-> CheckFunction(Check:Cell:@44<Function>, @39<Final>, MustGen|CanExit, function(0x1250ca1b0, mixin#AnlAZn/<nogen>:[0x125083070]), bc#91) --> mixin#AnlAZn:<0x125083070, bc#91, Call, known callee: Cell: 0x1250ca1b0 (%CK:Function), ID: 930, numArgs+this = 3, stack < loc9> 55: < 2:-> JSConstant(JS|UseAsOther, Other, $3 = Undefined, bc#0) 56: skipped < 0:-> MovHint(@55<Other>, loc10, W:SideState, bc#0) 57: skipped < 0:-> SetLocal(@55<Other>, loc10(R*<Other>/FlushedJSValue), W:Variables(-11), bc#0) 58: skipped < 0:-> MovHint(@55<Other>, loc11, W:SideState, bc#0) 59: skipped < 0:-> SetLocal(@55<Other>, loc11(S*<Other>/FlushedJSValue), W:Variables(-12), bc#0) 60: skipped < 0:-> MovHint(@55<Other>, loc12, W:SideState, bc#0) 61: skipped < 0:-> SetLocal(@55<Other>, loc12(T~<Other>/FlushedJSValue), W:Variables(-13), bc#0) 62: < 5:-> JSConstant(JS|UseAsOther, Empty, $5 = <JSValue()>, bc#1) 63: skipped < 0:-> MovHint(@62, loc11, W:SideState, bc#1) 64: <!0:-> Phantom(@55<Other>, MustGen, bc#3) 65: < 1:-> SetLocal(@62, loc11(U*/FlushedJSValue), W:Variables(-12), bc#3) predicting Empty 66: skipped < 0:-> MovHint(@62, loc10, W:SideState, bc#3) 67: <!0:-> Phantom(@55<Other>, MustGen, bc#5) 68: < 1:-> SetLocal(@62, loc10(V*/FlushedJSValue), W:Variables(-11), bc#5) predicting Empty 69: <!0:-> FunctionReentryWatchpoint(MustGen, R:Watchpoint_fire, bc#6) 70: < 3:-> WeakJSConstant(JS|UseAsOther, Otherobj, 0x122b8f470 (%EL:JSActivation), bc#6) 71: skipped < 0:-> MovHint(@70<Object>, loc13, W:SideState, bc#6) 72: skipped < 0:-> SetLocal(@70<Object>, loc13(W~<Object>/FlushedJSValue), W:Variables(-14), bc#12) 73: <!0:-> Phantom(@70<Object>, MustGen, bc#12) 74: <!0:-> VariableWatchpoint(MustGen|CanExit, 0x7ff931db5ab0, R:Watchpoint_fire, W:SideState, bc#12) 75: < 3:-> WeakJSConstant(JS|UseAsOther, Function, 0x122bbb130 (%CC:Function), bc#12) 76: skipped < 0:-> MovHint(@75<Function>, loc14, W:SideState, bc#12) 77: skipped < 0:-> SetLocal(@75<Function>, loc14(X~<Function>/FlushedJSValue), W:Variables(-15), bc#20) 78: <!0:-> StructureTransitionWatchpoint(Cell:@75<Function>, MustGen|CanExit, %CC:Function, R:JSCell_structureID, bc#20) 79: < 1:-> WeakJSConstant(JS|UseAsOther, Otherobj, 0x1144cd810 (%BC:Function), bc#20) 80: <!0:-> StructureTransitionWatchpoint(Cell:@79<Object>, MustGen|CanExit, %BC:Function, R:JSCell_structureID, bc#20) 81: <!0:-> Phantom(@75<Function>, MustGen, bc#20) 82: < 1:-> WeakJSConstant(JS|UseAsOther, Function, 0x122bbe4f0 (%CC:Function), bc#20) 83: skipped < 0:-> MovHint(@82<Function>, loc15, W:SideState, bc#20) 84: skipped < 0:-> SetLocal(@82<Function>, loc15(Y~<Function>/FlushedJSValue), W:Variables(-16), bc#29) 85: <!0:-> Phantom(Cell:@82<Function>, MustGen, bc#29) 88: skipped < 0:-> MovHint(@75<Function>, loc16, W:SideState, bc#33) 89: skipped < 0:-> SetLocal(@75<Function>, loc16(AB~<Function>/FlushedJSValue), W:Variables(-17), bc#36) 90: <!0:-> Phantom(@62, MustGen, Empty, bc#36) 91: < 4:-> CreateArguments(@62, JS|UseAsOther, Arguments, R:GCState,BarrierState, W:GCState,BarrierState,Watchpoint_fire,SideState, bc#36) 92: skipped < 0:-> MovHint(@91<Arguments>, loc11, W:SideState, bc#36) 93: skipped < 0:-> MovHint(@91<Arguments>, loc10, W:SideState, bc#36) 506: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#38) 94: <!0:-> Flush(@65, MustGen, loc11(U*/FlushedJSValue), W:SideState, bc#38) predicting Empty 95: < 1:-> SetLocal(@91<Arguments>, loc11(CB*<Arguments>/FlushedJSValue), W:Variables(-12), bc#38) predicting Arguments 96: <!0:-> Flush(@68, MustGen, loc10(V*/FlushedJSValue), W:SideState, bc#38) predicting Empty 97: < 2:-> SetLocal(@91<Arguments>, loc10(EB*<Arguments>/FlushedJSValue), W:Variables(-11), bc#38) predicting Arguments 98: <!0:-> Phantom(@91<Arguments>, MustGen, Arguments, bc#38) 99: skipped < 0:-> MovHint(@91<Arguments>, loc19, W:SideState, bc#38) 100: skipped < 0:-> SetLocal(@91<Arguments>, loc19(FB~<Arguments>/FlushedJSValue), W:Variables(-20), bc#41) 101: < 1:-> JSConstant(JS|UseAsOther, Int32, $4 = Int32: 1, bc#41) 102: skipped < 0:-> MovHint(@101<Int32>, loc18, W:SideState, bc#41) 103: skipped < 0:-> SetLocal(@101<Int32>, loc18(GB~<Int32>/FlushedJSValue), W:Variables(-19), bc#44) 104: <!1:-> Call(@75<Function>, @91<Arguments>, @101<Int32>, JS|MustGen|VarArgs|Clobbers|UseAsOther|CanExit, Array, R:World, W:World, bc#44) predicting Array 105: skipped < 0:-> MovHint(@104<Array>, loc12, W:SideState, bc#44) 507: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#53) 106: skipped < 0:-> SetLocal(@104<Array>, loc12(HB~<Array>/FlushedJSValue), W:Variables(-13), bc#53) 131: <!0:-> FunctionReentryWatchpoint(MustGen, R:Watchpoint_fire, bc#75) 133: skipped < 0:-> MovHint(@70<Object>, loc17, W:SideState, bc#75) 134: skipped < 0:-> SetLocal(@70<Object>, loc17(SB~<Object>/FlushedJSValue), W:Variables(-18), bc#81) 135: <!0:-> Phantom(@70<Object>, MustGen, bc#81) 136: <!0:-> VariableWatchpoint(MustGen|CanExit, 0x7ff931db7260, R:Watchpoint_fire, W:SideState, bc#81) 137: < 1:-> WeakJSConstant(JS|UseAsOther, Function, 0x1250ca270 (%CK:Function), bc#81) 138: skipped < 0:-> MovHint(@137<Function>, loc13, W:SideState, bc#81) 139: skipped < 0:-> SetLocal(@137<Function>, loc13(TB~<Function>/FlushedJSValue), W:Variables(-14), bc#89) 140: < 1:-> GetLocal(@50, JS|UseAsOther, Final, loc2(P*<Final>/FlushedJSValue), R:Variables(-3), bc#89) predicting Final 141: skipped < 0:-> MovHint(@140<Final>, loc16, W:SideState, bc#89) 142: skipped < 0:-> SetLocal(@140<Final>, loc16(VB~<Final>/FlushedJSValue), W:Variables(-17), bc#92) 143: skipped < 0:-> GetLocal(JS|UseAsOther, Array, loc12(HB~<Array>/FlushedJSValue), R:Variables(-13), bc#92) 144: skipped < 0:-> MovHint(@104<Array>, loc15, W:SideState, bc#92) 145: skipped < 0:-> SetLocal(@104<Array>, loc15(XB~<Array>/FlushedJSValue), W:Variables(-16), bc#95) 146: < 1:-> JSConstant(JS|UseAsOther, Bool, $1 = False, bc#95) 147: skipped < 0:-> MovHint(@146<Boolean>, loc14, W:SideState, bc#95) 148: skipped < 0:-> SetLocal(@146<Boolean>, loc14(YB~<Boolean>/FlushedJSValue), W:Variables(-15), bc#98) 149: <!0:-> Call(@137<Function>, @70<Object>, @140<Final>, @104<Array>, @146<Boolean>, JS|MustGen|VarArgs|Clobbers|PureInt|CanExit, Final, R:World, W:World, bc#98) predicting Final 150: skipped < 0:-> MovHint(@149<Final>, loc13, W:SideState, bc#98) 505: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#107) 151: skipped < 0:-> SetLocal(@149<Final>, loc13(ZB~<Final>/FlushedJSValue), W:Variables(-14), bc#107) 152: < 1:-> GetLocal(@97, JS|UseAsOther, Arguments, loc10(EB*<Arguments>/FlushedJSValue), R:Variables(-11), bc#107) predicting Arguments 154: <!0:-> TearOffArguments(@152<Arguments>, @62, MustGen, W:Arguments_registers, bc#107) 155: <!0:-> Flush(@53, MustGen, loc1(Q*<Final>/FlushedJSValue), W:SideState, bc#110) predicting Final 156: <!0:-> Flush(@50, MustGen, loc2(P*<Final>/FlushedJSValue), W:SideState, bc#110) predicting Final 157: <!0:-> Flush(@97, MustGen, loc10(EB*<Arguments>/FlushedJSValue), W:SideState, bc#110) predicting Arguments 158: <!0:-> Flush(@95, MustGen, loc11(CB*<Arguments>/FlushedJSValue), W:SideState, bc#110) predicting Arguments 159: skipped < 0:-> GetLocal(@50, JS|PureInt, Final, loc2(P*<Final>/FlushedJSValue), R:Variables(-3), bc#110) 160: skipped < 0:-> MovHint(@159<Final>, loc0, W:SideState, bc#110) 161: skipped < 0:-> SetLocal(@159<Final>, loc0(DC~<Final>/FlushedJSValue), W:Variables(-1), bc#110) <-- mixin#AnlAZn:<0x125083070, bc#91, Call, known callee: Cell: 0x1250ca1b0 (%CK:Function), ID: 930, numArgs+this = 3, stack < loc9> 162: <!0:-> Jump(MustGen, T:#6, W:SideState, bc#100) vars after: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) loc0:(Top, TOP, TOP, TOP) loc1:(Top, TOP, TOP, TOP) loc2:(Top, TOP, TOP, TOP) loc3:(Final, TOP, TOP, [%Bm:Object]) loc10:(Top, TOP, TOP, TOP) loc11:(Top, TOP, TOP, TOP) loc12:(Top, TOP, TOP, TOP) loc13:(Top, TOP, TOP, TOP) loc14:(Bool, False) loc15:(Top, TOP, TOP, TOP) loc16:(Top, TOP, TOP, TOP) loc17:(Otherobj, TOP, TOP, [%EL:JSActivation], Cell: 0x122b8f470 (%EL:JSActivation), ID: 1074) loc18:(Int32, Int32: 1) loc19:(Arguments, TOP, TOP, TOP) var links: arg1:@457 arg0:@47<Final> loc0:@161 loc1:@53 loc2:@159<Final> loc10:@152<Arguments> loc11:@95 Block #6 (bc#100): Predecessors: #1 #2 Dominated by: #0 #6 Dominates: #6 #7 #8 #9 #10 #14 #15 #16 Phi Nodes: @469<3>->(@448, @470), @456<2>->(@457, @449) vars before: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) var links: arg1:@456 arg0:@469 163: < 9:-> GetLocal(@469, JS|UseAsOther, Final, arg0(C<Final>/FlushedCell), R:Variables(6), bc#100) predicting Final 164: skipped < 0:-> MovHint(@163<Final>, loc0, W:SideState, bc#100) 165: skipped < 0:-> SetLocal(@163<Final>, loc0(FC~<Final>/FlushedJSValue), W:Variables(-1), bc#103) 166: < 1:-> NewObject(JS|UseAsOther, Final, %BB:Object, R:GCState,BarrierState, W:GCState,BarrierState, bc#103) 167: skipped < 0:-> MovHint(@166<Final>, loc1, W:SideState, bc#103) 168: skipped < 0:-> SetLocal(@166<Final>, loc1(GC~<Final>/FlushedJSValue), W:Variables(-2), bc#107) 490: <!0:-> StoreBarrier(Cell:@163<Final>, MustGen, R:BarrierState, W:BarrierState, bc#107) 169: <!0:-> PutById(Cell:@163<Final>, @166<Final>, MustGen|Clobbers|CanExit, id4{_inFlightAttributes}, R:World, W:World, bc#107) 500: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#116) 170: skipped < 0:-> MovHint(@163<Final>, loc3, W:SideState, bc#116) 171: skipped < 0:-> SetLocal(@163<Final>, loc3(HC~<Final>/FlushedJSValue), W:Variables(-4), bc#119) 172: <!1:-> GetById(Cell:@163<Final>, JS|MustGen|Clobbers|UseAsOther|CanExit, Function, id5{send}, R:World, W:World, bc#119) predicting Function 173: skipped < 0:-> MovHint(@172<Function>, loc0, W:SideState, bc#119) 501: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#128) 174: skipped < 0:-> SetLocal(@172<Function>, loc0(IC~<Function>/FlushedJSValue), W:Variables(-1), bc#128) 175: < 1:-> JSConstant(JS|UseAsOther, Stringident, $2 = String (identifier): didCommit, ID: 5, bc#128) 176: skipped < 0:-> MovHint(@175<StringIdent>, loc2, W:SideState, bc#128) 177: skipped < 0:-> SetLocal(@175<StringIdent>, loc2(JC~<StringIdent>/FlushedJSValue), W:Variables(-3), bc#131) 178: <!0:-> Call(@172<Function>, @163<Final>, @175<StringIdent>, JS|MustGen|VarArgs|Clobbers|PureInt|CanExit, Other, R:World, W:World, bc#131) predicting Other 179: skipped < 0:-> MovHint(@178<Other>, loc0, W:SideState, bc#131) 502: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#140) 180: skipped < 0:-> SetLocal(@178<Other>, loc0(KC~<Other>/FlushedJSValue), W:Variables(-1), bc#140) 181: skipped < 0:-> MovHint(@163<Final>, loc1, W:SideState, bc#140) 182: skipped < 0:-> SetLocal(@163<Final>, loc1(LC~<Final>/FlushedJSValue), W:Variables(-2), bc#143) 183: <!1:-> GetById(Cell:@163<Final>, JS|MustGen|Clobbers|UseAsOther|CanExit, Function, id6{updateRecordArraysLater}, R:World, W:World, bc#143) predicting Function 184: skipped < 0:-> MovHint(@183<Function>, loc0, W:SideState, bc#143) 503: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#152) 185: skipped < 0:-> SetLocal(@183<Function>, loc0(MC~<Function>/FlushedJSValue), W:Variables(-1), bc#152) 186: <!0:-> CheckFunction(Check:Cell:@183<Function>, @163<Final>, MustGen|CanExit, function(0x124f87b70, updateRecordArraysLater#ET1ozr/<nogen>:[0x124fdbf70]), bc#152) --> updateRecordArraysLater#ET1ozr:<0x124fdbf70, bc#152, Call, known callee: Cell: 0x124f87b70 (%CK:Function), ID: 930, numArgs+this = 1, stack < loc7> 187: <!0:-> Phantom(FinalObject:@163<Final>, MustGen, Final, bc#1) 188: skipped < 0:-> MovHint(@163<Final>, loc1, W:SideState, bc#1) 189: < 1:-> SetLocal(Cell:@163<Final>, loc1(NC<Final>/FlushedCell), W:Variables(-2), bc#4) predicting Final 190: <!1:-> GetById(Cell:@163<Final>, JS|MustGen|Clobbers|UseAsOther|CanExit, BoolOther, id11{_updatingRecordArraysLater}, R:World, W:World, bc#4) predicting BoolOther 191: skipped < 0:-> MovHint(@190<Misc>, loc8, W:SideState, bc#4) 504: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#13) 192: skipped < 0:-> SetLocal(@190<Misc>, loc8(OC~<Misc>/FlushedJSValue), W:Variables(-9), bc#13) 193: <!0:-> Branch(@190<Misc>, MustGen|CanExit, T:#7, F:#8, W:SideState, bc#13) vars after: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) loc0:(Function, TOP, TOP, TOP, Cell: 0x124f87b70 (%CK:Function), ID: 930) loc1:(Final, TOP, TOP, TOP) loc2:(Stringident, TOP, TOP, [%Dw:string], String (identifier): didCommit, ID: 5) loc3:(Final, TOP, TOP, TOP) loc8:(Top, TOP, TOP, TOP) var links: arg1:@456 arg0:@163<Final> loc0:@185 loc1:@189 loc2:@177 loc3:@171 loc8:@192 Block #7 (bc#152 --> updateRecordArraysLater#ET1ozr:<0x124fdbf70> bc#16): Predecessors: #6 Dominated by: #0 #6 #7 Dominates: #7 Phi Nodes: @452<1>->(@456), @453<1>->(@469) vars before: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) var links: arg1:@452 arg0:@453 194: skipped < 0:-> JSConstant(JS|PureInt, Other, $3 = Undefined, bc#16) 195: skipped < 0:-> MovHint(@194<Other>, loc0, W:SideState, bc#16) 196: skipped < 0:-> SetLocal(@194<Other>, loc0(PC~<Other>/FlushedJSValue), W:Variables(-1), bc#16) 197: <!0:-> Jump(MustGen, T:#14, W:SideState, bc#16) vars after: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) loc0:(Other, Undefined) var links: arg1:@452 arg0:@453 loc0:@196 Block #8 (bc#152 --> updateRecordArraysLater#ET1ozr:<0x124fdbf70> bc#18): Predecessors: #6 Dominated by: #0 #6 #8 Dominates: #8 #9 #10 Phi Nodes: @488<1>->(@189), @461<2>->(@456), @455<2>->(@469) vars before: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) loc1:(Final, TOP, TOP, TOP) var links: arg1:@461 arg0:@455 loc1:@488 198: < 1:-> JSConstant(JS|UseAsOther, Bool, $6 = True, bc#18) 199: < 4:-> GetLocal(@488, JS|UseAsOther, Final, loc1(NC<Final>/FlushedCell), R:Variables(-2), bc#18) predicting Final 491: <!0:-> StoreBarrier(Cell:@199<Final>, MustGen, R:BarrierState, W:BarrierState, bc#18) 200: <!0:-> PutById(Cell:@199<Final>, @198<Boolean>, MustGen|Clobbers|CanExit, id11{_updatingRecordArraysLater}, R:World, W:World, bc#18) 498: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#27) 201: < 8:-> WeakJSConstant(JS|UseAsOther, Otherobj, 0x11449d670 (%Eg:Window), bc#27) 202: skipped < 0:-> MovHint(@201<Object>, loc14, W:SideState, bc#27) 203: skipped < 0:-> SetLocal(@201<Object>, loc14(RC~<Object>/FlushedJSValue), W:Variables(-15), bc#33) 204: <!0:-> StructureTransitionWatchpoint(Cell:@201<Object>, MustGen|CanExit, %Eg:Window, R:JSCell_structureID, bc#33) 205: <!0:-> Phantom(@201<Object>, MustGen, bc#33) 206: < 1:-> GetButterfly(Cell:@201<Object>, Storage|UseAsOther, Other, R:JSObject_butterfly, bc#33) 207: < 3:-> GetByOffset(@206<Other>, KnownCell:@201<Object>, JS|UseAsOther, Final, id2{Ember}, 141, R:NamedProperties(2), bc#33) predicting Final 208: skipped < 0:-> MovHint(@207<Final>, loc15, W:SideState, bc#33) 209: skipped < 0:-> SetLocal(@207<Final>, loc15(SC~<Final>/FlushedJSValue), W:Variables(-16), bc#41) 210: <!0:-> CheckStructure(Check:Cell:@207<Final>, MustGen|CanExit, [%Bm:Object], R:JSCell_structureID, bc#41) 211: < 1:-> GetButterfly(Cell:@207<Final>, Storage|UseAsOther, Other, R:JSObject_butterfly, bc#41) 212: < 3:-> GetByOffset(@211<Other>, KnownCell:@207<Final>, JS|UseAsOther, Function, id12{run}, 211, R:NamedProperties(12), bc#41) predicting Function 213: skipped < 0:-> MovHint(@212<Function>, loc13, W:SideState, bc#41) 214: skipped < 0:-> SetLocal(@212<Function>, loc13(TC~<Function>/FlushedJSValue), W:Variables(-14), bc#50) 215: <!0:-> CheckStructure(Check:Cell:@212<Function>, MustGen|CanExit, [%AW:Function], R:JSCell_structureID, bc#50) 216: <!0:-> Phantom(@212<Function>, MustGen, bc#50) 217: < 1:-> WeakJSConstant(JS|UseAsOther, Function, 0x1250caef0 (%CK:Function), bc#50) 218: skipped < 0:-> MovHint(@217<Function>, loc8, W:SideState, bc#50) 219: skipped < 0:-> SetLocal(@217<Function>, loc8(UC~<Function>/FlushedJSValue), W:Variables(-9), bc#59) 220: < 1:-> JSConstant(JS|UseAsOther, Stringident, $7 = String (identifier): actions, ID: 5, bc#59) 221: skipped < 0:-> MovHint(@220<StringIdent>, loc12, W:SideState, bc#59) 222: < 2:-> SetLocal(@220<StringIdent>, loc12(VC*<StringIdent>/FlushedJSValue), W:Variables(-13), bc#62) predicting Stringident 223: skipped < 0:-> MovHint(@199<Final>, loc11, W:SideState, bc#62) 224: < 2:-> SetLocal(@199<Final>, loc11(WC*<Final>/FlushedJSValue), W:Variables(-12), bc#65) predicting Final 225: <!1:-> GetById(Cell:@199<Final>, JS|MustGen|Clobbers|UseAsOther|CanExit, Function, id14{updateRecordArrays}, R:World, W:World, bc#65) predicting Function 226: skipped < 0:-> MovHint(@225<Function>, loc10, W:SideState, bc#65) 499: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#74) 227: < 2:-> SetLocal(@225<Function>, loc10(XC*<Function>/FlushedJSValue), W:Variables(-11), bc#74) predicting Function 228: <!0:-> Phantom(@217<Function>, @212<Function>, MustGen, bc#74) --> schedule#DonjJQ:<0x125088970, bc#74, Call, known callee: Cell: 0x1250caef0 (%CK:Function), ID: 930, numArgs+this = 4, stack < loc19> 229: < 2:-> JSConstant(JS|UseAsOther, Other, $3 = Undefined, bc#0) 230: skipped < 0:-> MovHint(@229<Other>, loc20, W:SideState, bc#0) 231: skipped < 0:-> SetLocal(@229<Other>, loc20(YC*<Other>/FlushedJSValue), W:Variables(-21), bc#0) 232: skipped < 0:-> MovHint(@229<Other>, loc21, W:SideState, bc#0) 233: skipped < 0:-> SetLocal(@229<Other>, loc21(ZC*<Other>/FlushedJSValue), W:Variables(-22), bc#0) 234: < 2:-> JSConstant(JS|UseAsOther, Empty, $5 = <JSValue()>, bc#1) 235: skipped < 0:-> MovHint(@234, loc21, W:SideState, bc#1) 236: <!0:-> Phantom(@229<Other>, MustGen, bc#3) 237: < 2:-> SetLocal(@234, loc21(AD*/FlushedJSValue), W:Variables(-22), bc#3) predicting Empty 238: skipped < 0:-> MovHint(@234, loc20, W:SideState, bc#3) 239: <!0:-> Phantom(@229<Other>, MustGen, bc#5) 240: < 2:-> SetLocal(@234, loc20(BD*/FlushedJSValue), W:Variables(-21), bc#5) predicting Empty 241: <!0:-> FunctionReentryWatchpoint(MustGen, R:Watchpoint_fire, bc#6) 242: < 2:-> WeakJSConstant(JS|UseAsOther, Otherobj, 0x1231fd330 (%EL:JSActivation), bc#6) 243: skipped < 0:-> MovHint(@242<Object>, loc23, W:SideState, bc#6) 244: skipped < 0:-> SetLocal(@242<Object>, loc23(CD~<Object>/FlushedJSValue), W:Variables(-24), bc#12) 245: <!0:-> Phantom(@242<Object>, MustGen, bc#12) 246: <!0:-> VariableWatchpoint(MustGen|CanExit, 0x7ff931daf850, R:Watchpoint_fire, W:SideState, bc#12) 247: < 1:-> WeakJSConstant(JS|UseAsOther, Function, 0x1250cb830 (%CK:Function), bc#12) 248: skipped < 0:-> MovHint(@247<Function>, loc22, W:SideState, bc#12) 249: skipped < 0:-> SetLocal(@247<Function>, loc22(DD~<Function>/FlushedJSValue), W:Variables(-23), bc#20) 250: <!0:-> Phantom(@247<Function>, @242<Object>, MustGen, bc#20) --> checkAutoRun#Di3nk8:<0x125089070, bc#20, Call, known callee: Cell: 0x1250cb830 (%CK:Function), ID: 930, numArgs+this = 1, stack < loc29> 251: skipped < 0:-> MovHint(@201<Object>, loc30, W:SideState, bc#1) 252: skipped < 0:-> SetLocal(@201<Object>, loc30(ED~<Object>/FlushedJSValue), W:Variables(-31), bc#7) 253: <!0:-> StructureTransitionWatchpoint(Cell:@201<Object>, MustGen|CanExit, %Eg:Window, R:JSCell_structureID, bc#7) 254: <!0:-> Phantom(@201<Object>, MustGen, bc#7) 255: < 1:-> GetButterfly(Cell:@201<Object>, Storage|UseAsOther, Other, R:JSObject_butterfly, bc#7) 256: < 3:-> GetByOffset(@255<Other>, KnownCell:@201<Object>, JS|UseAsOther, Final, id2{Ember}, 141, R:NamedProperties(2), bc#7) predicting Final 257: skipped < 0:-> MovHint(@256<Final>, loc31, W:SideState, bc#7) 258: skipped < 0:-> SetLocal(@256<Final>, loc31(FD~<Final>/FlushedJSValue), W:Variables(-32), bc#15) 259: <!0:-> CheckStructure(Check:Cell:@256<Final>, MustGen|CanExit, [%Bm:Object], R:JSCell_structureID, bc#15) 260: < 1:-> GetButterfly(Cell:@256<Final>, Storage|UseAsOther, Other, R:JSObject_butterfly, bc#15) 261: < 3:-> GetByOffset(@260<Other>, KnownCell:@256<Final>, JS|UseAsOther, Function, id12{run}, 211, R:NamedProperties(12), bc#15) predicting Function 262: skipped < 0:-> MovHint(@261<Function>, loc30, W:SideState, bc#15) 263: skipped < 0:-> SetLocal(@261<Function>, loc30(GD~<Function>/FlushedJSValue), W:Variables(-31), bc#24) 264: <!0:-> CheckStructure(Check:Cell:@261<Function>, MustGen|CanExit, [%AW:Function], R:JSCell_structureID, bc#24) 265: < 1:-> GetButterfly(Cell:@261<Function>, Storage|UseAsOther, Other, R:JSObject_butterfly, bc#24) 266: < 1:-> GetByOffset(@265<Other>, KnownCell:@261<Function>, JS|UseAsOther, Final, id18{currentRunLoop}, 102, R:NamedProperties(18), bc#24) predicting Final 267: skipped < 0:-> MovHint(@266<Final>, loc30, W:SideState, bc#24) 268: skipped < 0:-> SetLocal(@266<Final>, loc30(HD~<Final>/FlushedJSValue), W:Variables(-31), bc#33) 269: <!0:-> Branch(Check:ObjectOrOther:@266<Final>, MustGen|CanExit, T:#10, F:#9, W:SideState, bc#33) vars after: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) loc1:(Final, TOP, TOP, TOP) loc8:(Function, TOP, TOP, TOP, Cell: 0x1250caef0 (%CK:Function), ID: 930) loc10:(Top, TOP, TOP, TOP) loc11:(Final, TOP, TOP, TOP) loc12:(Stringident, TOP, TOP, [%Dw:string], String (identifier): actions, ID: 5) loc13:(Function, TOP, TOP, [%AW:Function]) loc14:(Otherobj, NonArray, [%Eg:Window], [%Eg:Window], Cell: 0x11449d670 (%Eg:Window), ID: 11481) loc15:(Final, TOP, TOP, [%Bm:Object]) loc20:(Empty) loc21:(Empty) loc22:(Function, TOP, TOP, TOP, Cell: 0x1250cb830 (%CK:Function), ID: 930) loc23:(Otherobj, TOP, TOP, [%EL:JSActivation], Cell: 0x1231fd330 (%EL:JSActivation), ID: 1074) loc30:(ObjectOther, TOP, TOP, TOP) loc31:(Final, NonArray, [%Bm:Object], [%Bm:Object]) var links: arg1:@461 arg0:@455 loc1:@199<Final> loc8:@219 loc10:@227 loc11:@224 loc12:@222 loc13:@214 loc14:@203 loc15:@209 loc20:@240 loc21:@237 loc22:@249 loc23:@244 loc30:@268 loc31:@258 Block #9 (bc#152 --> updateRecordArraysLater#ET1ozr:<0x124fdbf70> bc#74 --> schedule#DonjJQ:<0x125088970> bc#20 --> checkAutoRun#Di3nk8:<0x125089070> bc#36): Predecessors: #8 Dominated by: #0 #6 #8 #9 Dominates: #9 Phi Nodes: @475<1>->(@237), @444<1>->(@240), @481<1>->(@227), @466<1>->(@224), @450<1>->(@222), @474<1>->(@461), @454<1>->(@455) vars before: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) loc10:(Top, TOP, TOP, TOP) loc11:(Final, TOP, TOP, TOP) loc12:(Stringident, TOP, TOP, [%Dw:string], String (identifier): actions, ID: 5) loc20:(Empty) loc21:(Empty) var links: arg1:@474 arg0:@454 loc10:@481 loc11:@466 loc12:@450 loc20:@444 loc21:@475 270: < 8:-> WeakJSConstant(JS|UseAsOther, Otherobj, 0x11449d670 (%Eg:Window), bc#36) 271: skipped < 0:-> MovHint(@270<Object>, loc33, W:SideState, bc#36) 272: skipped < 0:-> SetLocal(@270<Object>, loc33(ID~<Object>/FlushedJSValue), W:Variables(-34), bc#42) 273: <!0:-> ForceOSRExit(MustGen|CanExit, W:SideState, bc#42) 274: <!0:-> CheckStructure(Check:Cell:@270<Object>, MustGen|CanExit, [%C7:Window], R:JSCell_structureID, bc#42) 275: <!0:-> Phantom(@270<Object>, MustGen|CanExit, bc#42) 276: < 1:-> GetButterfly(Check:Cell:@270<Object>, Storage|UseAsOther|CanExit, Other, R:JSObject_butterfly, bc#42) 277: < 2:-> GetByOffset(@276<Other>, Check:KnownCell:@270<Object>, JS|UseAsOther|CanExit, id2{Ember}, 141, R:NamedProperties(2), bc#42) predicting None 278: skipped < 0:-> MovHint(@277, loc33, W:SideState, bc#42) 279: skipped < 0:-> SetLocal(@277, CanExit, loc33(JD~/FlushedJSValue), W:Variables(-34), bc#50) 280: <!0:-> ForceOSRExit(MustGen|CanExit, W:SideState, bc#50) 281: <!1:-> GetById(@277, JS|MustGen|Clobbers|UseAsOther|CanExit, id19{assert}, R:World, W:World, bc#50) predicting None 282: skipped < 0:-> MovHint(@281, loc30, W:SideState, bc#50) 495: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#59) 283: skipped < 0:-> SetLocal(@281, CanExit, loc30(KD~/FlushedJSValue), W:Variables(-31), bc#59) 284: < 1:-> JSConstant(JS|UseAsOther, Stringident, $8 = String (identifier): You have turned on testing mode, which disabled the run-loop's autorun. You will need to wrap any code with asynchronous side-effects in an Ember.run, ID: 5, bc#59) 285: skipped < 0:-> MovHint(@284<StringIdent>, loc32, W:SideState, bc#59) 286: skipped < 0:-> SetLocal(@284<StringIdent>, CanExit, loc32(LD~<StringIdent>/FlushedJSValue), W:Variables(-33), bc#62) 287: skipped < 0:-> MovHint(@270<Object>, loc34, W:SideState, bc#62) 288: skipped < 0:-> SetLocal(@270<Object>, CanExit, loc34(MD~<Object>/FlushedJSValue), W:Variables(-35), bc#68) 289: <!0:-> ForceOSRExit(MustGen|CanExit, W:SideState, bc#68) 290: <!0:-> CheckStructure(Check:Cell:@270<Object>, MustGen|CanExit, [%C7:Window], R:JSCell_structureID, bc#68) 291: <!0:-> Phantom(@270<Object>, MustGen|CanExit, bc#68) 292: < 1:-> GetButterfly(Check:Cell:@270<Object>, Storage|UseAsOther|CanExit, Other, R:JSObject_butterfly, bc#68) 293: < 1:-> GetByOffset(@292<Other>, Check:KnownCell:@270<Object>, JS|UseAsOther|CanExit, id2{Ember}, 141, R:NamedProperties(2), bc#68) predicting None 294: skipped < 0:-> MovHint(@293, loc35, W:SideState, bc#68) 295: skipped < 0:-> SetLocal(@293, CanExit, loc35(ND~/FlushedJSValue), W:Variables(-36), bc#76) 296: <!0:-> ForceOSRExit(MustGen|CanExit, W:SideState, bc#76) 297: <!1:-> GetById(@293, JS|MustGen|Clobbers|UseAsOther|CanExit, id20{testing}, R:World, W:World, bc#76) predicting None 298: skipped < 0:-> MovHint(@297, loc34, W:SideState, bc#76) 496: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#85) 299: skipped < 0:-> SetLocal(@297, CanExit, loc34(OD~/FlushedJSValue), W:Variables(-35), bc#85) 300: < 1:-> LogicalNot(@297, Boolean|UseAsOther|CanExit, Bool, bc#85) 301: skipped < 0:-> MovHint(@300<Boolean>, loc31, W:SideState, bc#85) 302: skipped < 0:-> SetLocal(@300<Boolean>, CanExit, loc31(PD~<Boolean>/FlushedJSValue), W:Variables(-32), bc#88) 303: <!0:-> ForceOSRExit(MustGen|CanExit, W:SideState, bc#88) 304: <!0:-> Call(@281, @277, @284<StringIdent>, @300<Boolean>, JS|MustGen|VarArgs|Clobbers|PureInt|CanExit, R:World, W:World, bc#88) predicting None 305: skipped < 0:-> MovHint(@304, loc30, W:SideState, bc#88) 497: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#97) 306: skipped < 0:-> SetLocal(@304, CanExit, loc30(QD~/FlushedJSValue), W:Variables(-31), bc#97) 307: <!0:-> Jump(MustGen|CanExit, T:#10, W:SideState, bc#97) vars after: var links: arg1:@474 arg0:@454 loc10:@481 loc11:@466 loc12:@450 loc20:@444 loc21:@475 loc30:@306 loc31:@302 loc32:@286 loc33:@279 loc34:@299 loc35:@295 Block #10 (bc#152 --> updateRecordArraysLater#ET1ozr:<0x124fdbf70> bc#74 --> schedule#DonjJQ:<0x125088970> bc#20 --> checkAutoRun#Di3nk8:<0x125089070> bc#97): Predecessors: #8 #9 Dominated by: #0 #6 #8 #10 Dominates: #10 Phi Nodes: @476<2>->(@450, @222), @484<2>->(@466, @224), @473<2>->(@481, @227), @463<2>->(@444, @240), @471<1>->(@475, @237), @451<1>->(@474, @461), @459<1>->(@454, @455) vars before: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) loc10:(Top, TOP, TOP, TOP) loc11:(Final, TOP, TOP, TOP) loc12:(Stringident, TOP, TOP, [%Dw:string], String (identifier): actions, ID: 5) loc20:(Empty) loc21:(Empty) var links: arg1:@451 arg0:@459 loc10:@473 loc11:@484 loc12:@365 loc20:@463 loc21:@401 308: skipped < 0:-> JSConstant(JS|PureInt, Other, $3 = Undefined, bc#97) 309: skipped < 0:-> MovHint(@308<Other>, loc22, W:SideState, bc#97) 310: skipped < 0:-> SetLocal(@308<Other>, loc22(RD~<Other>/FlushedJSValue), W:Variables(-23), bc#97) <-- checkAutoRun#Di3nk8:<0x125089070, bc#20, Call, known callee: Cell: 0x1250cb830 (%CK:Function), ID: 930, numArgs+this = 1, stack < loc29> 311: <!0:-> FunctionReentryWatchpoint(MustGen, R:Watchpoint_fire, bc#29) 312: < 2:-> WeakJSConstant(JS|UseAsOther, Otherobj, 0x1231fd330 (%EL:JSActivation), bc#29) 313: skipped < 0:-> MovHint(@312<Object>, loc22, W:SideState, bc#29) 314: skipped < 0:-> SetLocal(@312<Object>, loc22(SD~<Object>/FlushedJSValue), W:Variables(-23), bc#35) 315: <!0:-> Phantom(@312<Object>, MustGen, bc#35) 316: <!0:-> VariableWatchpoint(MustGen|CanExit, 0x7ff931daff00, R:Watchpoint_fire, W:SideState, bc#35) 317: < 3:-> WeakJSConstant(JS|UseAsOther, Final, 0x1231fd070 (%EH:Object), bc#35) 318: skipped < 0:-> MovHint(@317<Final>, loc23, W:SideState, bc#35) 319: skipped < 0:-> SetLocal(@317<Final>, loc23(TD~<Final>/FlushedJSValue), W:Variables(-24), bc#43) 320: <!0:-> StructureTransitionWatchpoint(Cell:@317<Final>, MustGen|CanExit, %EH:Object, R:JSCell_structureID, bc#43) 321: < 1:-> WeakJSConstant(JS|UseAsOther, Final, 0x124f7db70 (%EF:Object), bc#43) 322: <!0:-> StructureTransitionWatchpoint(Cell:@321<Final>, MustGen|CanExit, %EF:Object, R:JSCell_structureID, bc#43) 323: <!0:-> Phantom(@317<Final>, MustGen, bc#43) 324: < 3:-> WeakJSConstant(JS|UseAsOther, Function, 0x1250cb230 (%CK:Function), bc#43) 325: skipped < 0:-> MovHint(@324<Function>, loc22, W:SideState, bc#43) 326: skipped < 0:-> SetLocal(@324<Function>, loc22(UD~<Function>/FlushedJSValue), W:Variables(-23), bc#52) 327: <!0:-> CheckStructure(Cell:@324<Function>, MustGen|CanExit, [%CK:Function], R:JSCell_structureID, bc#52) 328: < 1:-> WeakJSConstant(JS|UseAsOther, Otherobj, 0x1144cd810 (%BC:Function), bc#52) 329: <!0:-> StructureTransitionWatchpoint(Cell:@328<Object>, MustGen|CanExit, %BC:Function, R:JSCell_structureID, bc#52) 330: <!0:-> Phantom(@324<Function>, MustGen, bc#52) 331: < 1:-> WeakJSConstant(JS|UseAsOther, Function, 0x122bbe530 (%CC:Function), bc#52) 332: skipped < 0:-> MovHint(@331<Function>, loc24, W:SideState, bc#52) 333: skipped < 0:-> SetLocal(@331<Function>, loc24(VD~<Function>/FlushedJSValue), W:Variables(-25), bc#61) 334: <!0:-> Phantom(Cell:@331<Function>, MustGen, bc#61) 337: skipped < 0:-> MovHint(@324<Function>, loc25, W:SideState, bc#65) 338: skipped < 0:-> SetLocal(@324<Function>, loc25(XD~<Function>/FlushedJSValue), W:Variables(-26), bc#68) 339: <!0:-> FunctionReentryWatchpoint(MustGen, R:Watchpoint_fire, bc#68) 341: skipped < 0:-> MovHint(@312<Object>, loc26, W:SideState, bc#68) 342: skipped < 0:-> SetLocal(@312<Object>, loc26(YD~<Object>/FlushedJSValue), W:Variables(-27), bc#74) 343: <!0:-> Phantom(@312<Object>, MustGen, bc#74) 344: <!0:-> VariableWatchpoint(MustGen|CanExit, 0x7ff931daff00, R:Watchpoint_fire, W:SideState, bc#74) 346: skipped < 0:-> MovHint(@317<Final>, loc27, W:SideState, bc#74) 347: skipped < 0:-> SetLocal(@317<Final>, loc27(ZD~<Final>/FlushedJSValue), W:Variables(-28), bc#82) 349: skipped < 0:-> MovHint(@317<Final>, loc31, W:SideState, bc#82) 350: skipped < 0:-> SetLocal(@317<Final>, loc31(AE~<Final>/FlushedJSValue), W:Variables(-32), bc#82) 365: <!0:-> PhantomLocal(@476, MustGen, loc12(VC*<StringIdent>/FlushedJSValue), W:SideState, bc#82) predicting Stringident 351: < 1:-> JSConstant(JS|UseAsOther, Stringident, $7 = String (identifier): actions, ID: 5, bc#82) 352: skipped < 0:-> MovHint(@351<StringIdent>, loc30, W:SideState, bc#82) 353: skipped < 0:-> SetLocal(@351<StringIdent>, loc30(CE~<StringIdent>/FlushedJSValue), W:Variables(-31), bc#82) 354: < 1:-> GetLocal(@484, JS|UseAsOther, Final, loc11(WC*<Final>/FlushedJSValue), R:Variables(-12), bc#82) predicting Final 355: skipped < 0:-> MovHint(@354<Final>, loc29, W:SideState, bc#82) 356: skipped < 0:-> SetLocal(@354<Final>, loc29(EE~<Final>/FlushedJSValue), W:Variables(-30), bc#82) 357: < 1:-> GetLocal(@473, JS|UseAsOther, Function, loc10(XC*<Function>/FlushedJSValue), R:Variables(-11), bc#82) predicting Function 358: skipped < 0:-> MovHint(@357<Function>, loc28, W:SideState, bc#82) 359: skipped < 0:-> SetLocal(@357<Function>, loc28(GE~<Function>/FlushedJSValue), W:Variables(-29), bc#82) 360: <!0:-> Call(@324<Function>, @317<Final>, @351<StringIdent>, @354<Final>, @357<Function>, JS|MustGen|VarArgs|Clobbers|PureInt|CanExit, Final, R:World, W:World, bc#82) predicting Final 361: skipped < 0:-> MovHint(@360<Final>, loc23, W:SideState, bc#82) 494: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#91) 362: skipped < 0:-> SetLocal(@360<Final>, loc23(HE~<Final>/FlushedJSValue), W:Variables(-24), bc#91) 394: < 1:-> GetLocal(@463, JS|UseAsOther, Empty, loc20(BD*/FlushedJSValue), R:Variables(-21), bc#124) predicting Empty 395: skipped < 0:-> JSConstant(JS|UseAsOther, Empty, $5 = <JSValue()>, bc#124) 396: <!0:-> Phantom(@394, MustGen, bc#124) 397: <!0:-> Flush(@473, MustGen, loc10(XC*<Function>/FlushedJSValue), W:SideState, bc#127) predicting Function 398: <!0:-> Flush(@484, MustGen, loc11(WC*<Final>/FlushedJSValue), W:SideState, bc#127) predicting Final 399: <!0:-> Flush(@476, MustGen, loc12(VC*<StringIdent>/FlushedJSValue), W:SideState, bc#127) predicting Stringident 400: <!0:-> Flush(@463, MustGen, loc20(BD*/FlushedJSValue), W:SideState, bc#127) predicting Empty 401: <!0:-> Flush(@471, MustGen, loc21(AD*/FlushedJSValue), W:SideState, bc#127) predicting Empty 403: skipped < 0:-> MovHint(@308<Other>, loc8, W:SideState, bc#127) 404: skipped < 0:-> SetLocal(@308<Other>, loc8(YE~<Other>/FlushedJSValue), W:Variables(-9), bc#127) <-- schedule#DonjJQ:<0x125088970, bc#74, Call, known callee: Cell: 0x1250caef0 (%CK:Function), ID: 930, numArgs+this = 4, stack < loc19> 405: skipped < 0:-> MovHint(@308<Other>, loc0, W:SideState, bc#83) 406: skipped < 0:-> SetLocal(@308<Other>, loc0(ZE~<Other>/FlushedJSValue), W:Variables(-1), bc#83) 407: <!0:-> Jump(MustGen, T:#14, W:SideState, bc#83) vars after: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) loc0:(Other, Undefined) loc8:(Other, Undefined) loc10:(Top, TOP, TOP, TOP) loc11:(Top, TOP, TOP, TOP) loc12:(Top, TOP, TOP, TOP) loc20:(TopEmpty, TOP, TOP, TOP) loc21:(TopEmpty, TOP, TOP, TOP) loc22:(Function, TOP, TOP, TOP, Cell: 0x1250cb230 (%CK:Function), ID: 930) loc23:(Top, TOP, TOP, TOP) loc24:(Function, TOP, TOP, [%CC:Function], Cell: 0x122bbe530 (%CC:Function), ID: 957) loc25:(Function, TOP, TOP, TOP, Cell: 0x1250cb230 (%CK:Function), ID: 930) loc26:(Otherobj, TOP, TOP, [%EL:JSActivation], Cell: 0x1231fd330 (%EL:JSActivation), ID: 1074) loc27:(Final, TOP, TOP, [%EH:Object], Cell: 0x1231fd070 (%EH:Object), ID: 8382) loc28:(Top, TOP, TOP, TOP) loc29:(Final, TOP, TOP, TOP) loc30:(Stringident, TOP, TOP, [%Dw:string], String (identifier): actions, ID: 5) loc31:(Final, TOP, TOP, [%EH:Object], Cell: 0x1231fd070 (%EH:Object), ID: 8382) var links: arg1:@451 arg0:@459 loc0:@406 loc8:@404 loc10:@357<Function> loc11:@354<Final> loc12:@365 loc20:@394 loc21:@401 loc22:@326 loc23:@362 loc24:@333 loc25:@338 loc26:@342 loc27:@347 loc28:@359 loc29:@356 loc30:@353 loc31:@350 Block #14 (bc#161): Predecessors: #7 #10 Dominated by: #0 #6 #14 Dominates: #14 #15 #16 Phi Nodes: @443<3>->(@451, @452), @477<1>->(@459, @453) vars before: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) var links: arg1:@443 arg0:@477 <-- updateRecordArraysLater#ET1ozr:<0x124fdbf70, bc#152, Call, known callee: Cell: 0x124f87b70 (%CK:Function), ID: 930, numArgs+this = 1, stack < loc7> 408: < 1:-> GetLocal(@443, JS|UseAsOther, Other, arg1(B~<Other>/FlushedJSValue), R:Variables(7), bc#161) predicting Other 409: <!0:-> Branch(ObjectOrOther:@408<Other>, MustGen|CanExit, T:#16, F:#15, W:SideState, bc#161) vars after: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) var links: arg1:@408<Other> arg0:@477 Block #15 (bc#164): Predecessors: #14 Dominated by: #0 #6 #14 #15 Dominates: #15 Phi Nodes: @445<1>->(@443) vars before: arg1:(ObjectOther, TOP, TOP, TOP) var links: arg1:@410 410: <!0:-> Flush(@445, MustGen, arg1(B~<Other>/FlushedJSValue), W:SideState, bc#164) predicting Other 411: < 1:-> JSConstant(JS|UseAsOther, Other, $3 = Undefined, bc#164) 412: <!0:-> Return(@411<Other>, MustGen, W:SideState, bc#164) vars after: var links: arg1:@410 Block #16 (bc#166): Predecessors: #14 Dominated by: #0 #6 #14 #16 Dominates: #16 Phi Nodes: @446<1>->(@477), @447<1>->(@443) vars before: arg1:(ObjectOther, TOP, TOP, TOP) arg0:(Final, TOP, TOP, TOP) var links: arg1:@427 arg0:@446 413: < 2:-> GetLocal(@446, JS|UseAsOther, Final, arg0(C<Final>/FlushedCell), R:Variables(6), bc#166) predicting Final 414: skipped < 0:-> MovHint(@413<Final>, loc3, W:SideState, bc#166) 415: skipped < 0:-> SetLocal(@413<Final>, loc3(DF~<Final>/FlushedJSValue), W:Variables(-4), bc#169) 416: <!0:-> ForceOSRExit(MustGen|CanExit, W:SideState, bc#169) 417: <!1:-> GetById(Check:Cell:@413<Final>, JS|MustGen|Clobbers|UseAsOther|CanExit, id7{suspendRelationshipObservers}, R:World, W:World, bc#169) predicting None 418: skipped < 0:-> MovHint(@417, loc0, W:SideState, bc#169) 492: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#178) 419: skipped < 0:-> SetLocal(@417, CanExit, loc0(EF~/FlushedJSValue), W:Variables(-1), bc#178) 420: < 1:-> NewFunctionExpression(JS|UseAsOther|CanExit, Function, #<nogen>/<nogen>:[0x122b9d570], R:GCState,BarrierState, W:GCState,BarrierState, bc#178) 421: skipped < 0:-> MovHint(@420<Function>, loc2, W:SideState, bc#178) 422: skipped < 0:-> SetLocal(@420<Function>, CanExit, loc2(FF~<Function>/FlushedJSValue), W:Variables(-3), bc#181) 423: <!0:-> ForceOSRExit(MustGen|CanExit, W:SideState, bc#181) 424: <!0:-> Call(@417, @413<Final>, @420<Function>, JS|MustGen|VarArgs|Clobbers|PureInt|CanExit, R:World, W:World, bc#181) predicting None 425: skipped < 0:-> MovHint(@424, loc0, W:SideState, bc#181) 493: <!0:-> InvalidationPoint(MustGen|CanExit, W:SideState, bc#190) 426: skipped < 0:-> SetLocal(@424, CanExit, loc0(GF~/FlushedJSValue), W:Variables(-1), bc#190) 427: <!0:-> Flush(@447, MustGen, arg1(B~<Other>/FlushedJSValue), W:SideState, bc#190) predicting Other 428: < 1:-> JSConstant(JS|UseAsOther, Other, $3 = Undefined, bc#190) 429: <!0:-> Return(@428<Other>, MustGen|CanExit, W:SideState, bc#190) vars after: var links: arg1:@427 arg0:@413<Final> loc0:@426 loc2:@422 loc3:@415 Structures: %AW:Function = 0x12506d4f0:[Function, {join:100=>0x1250cafb0, backburner:101, currentRunLoop:102, queues:103, begin:104=>0x1250caf70, end:105=>0x1250caf30, schedule:106=>0x1250caef0, hasScheduledTimers:107=>0x1250caeb0, cancelTimers:108=>0x1250cae70, sync:109=>0x1250cae30, later:110=>0x1250cadf0, once:111=>0x1250cadb0, scheduleOnce:112=>0x1250cad70, next:113=>0x1250cad30, cancel:114=>0x1250cacf0, debounce:115=>0x1250cacb0, throttle:116=>0x1250cac70}, NonArray, Proto:0x1144cd810] %BB:Object = 0x122ba9c70:[Object, {}, NonArray, Proto:0x1140eee20] %BC:Function = 0x124f9f670:[Function, {name:100, length:101, toString:102=>0x122bbe570, apply:103=>0x122bbe530, call:104=>0x122bbe4f0, bind:105=>0x122bbe4b0, constructor:106=>0x1144cd770, property:107=>0x1250c47b0, observes:108=>0x1250c4770, observesImmediately:109=>0x1250c4730, observesBefore:110=>0x1250c46f0, on:111=>0x1250c46b0}, NonArray, Proto:0x1140eee20] %Bm:Object = 0x1253e93f0:[Object, {ENV:0, assert:1=>0x1250cf8b0, warn:100=>0x1250cf870, debug:101=>0x1250cf830, deprecate:102=>0x1250cf7f0, deprecateFunc:103=>0x1250cf7b0, imports:104, exports:105, lookup:106, isNamespace:107, toString:108=>0x1250cf630, VERSION:109, config:110, FEATURES:111, EXTEND_PROTOTYPES:112, LOG_STACKTRACE_ON_DEPRECATION:113, SHIM_ES5:114, LOG_VERSION:115, K:116=>0x1250cf5b0, uuid:117, merge:118=>0x1250cf570, isNone:119=>0x1250cf530, none:120=>0x1250cf4f0, isEmpty:121=>0x1250cf4b0, empty:122=>0x1250cf470, platform:123, create:124=>0x1250cf3f0, ArrayPolyfills:125, Error:126=>0x1250cf130, onerror:127, handleErrors:128=>0x1250cf0f0, GUID_PREFIX:129, GUID_KEY:130, generateGuid:131=>0x1250ceff0, guidFor:132=>0x1250cefb0, META_KEY:133, EMPTY_META:134, meta:135=>0x1250cef70, getMeta:136=>0x1250cef30, setMeta:137=>0x1250ceef0, metaPath:138=>0x1250ceeb0, wrap:139=>0x1250cee70, isArray:140=>0x1250cee30, makeArray:141=>0x1250cedf0, canInvoke:142=>0x1250cf030, tryInvoke:143=>0x1250cedb0, tryFinally:144=>0x1250ced30, tryCatchFinally:145=>0x1250cecf0, typeOf:146=>0x1250cec70, Instrumentation:147, instrument:148=>0x1250ceb30, subscribe:149=>0x1250ceaf0, EnumerableUtils:150, normalizeTuple:151=>0x1250ce730, _getPath:152=>0x1250ce6f0, getWithDefault:153=>0x1250ce6b0, get:154=>0x1250ce770, on:155=>0x1250ce570, addListener:156=>0x1250ce530, removeListener:157=>0x1250ce5b0, _suspendListener:158=>0x1250ce4f0, _suspendListeners:159=>0x1250ce4b0, sendEvent:160=>0x1250ce470, hasListeners:161=>0x1250ce430, watchedEvents:162=>0x1250ce3f0, listenersFor:163=>0x1250ce3b0, listenersDiff:164=>0x1250ce370, listenersUnion:165=>0x1250ce330, _ObserverSet:166=>0x1250ce2b0, propertyWillChange:167=>0x1250ce170, propertyDidChange:168=>0x1250ce130, overrideChains:169=>0x1250cdeb0, beginPropertyChanges:170=>0x1250cdfb0, endPropertyChanges:171=>0x1250cdf70, changeProperties:172=>0x1250cde70, set:173=>0x1250cddb0, trySet:174=>0x1250cdd70, OrderedSet:175=>0x1250cdc70, Map:176=>0x1250cd9f0, MapWithDefault:177=>0x1250cd7f0, Logger:178, Descriptor:179=>0x1250cd4b0, MANDATORY_SETTER_FUNCTION:180=>0x1250cd470, DEFAULT_GETTER_FUNCTION:181=>0x1250cd430, defineProperty:182=>0x1250cd3f0, getProperties:183=>0x1250cd370, setProperties:184=>0x1250cd2f0, watchKey:185=>0x1250cd270, unwatchKey:186=>0x1250cd230, flushPendingChains:187=>0x1250cd0f0, removeChainWatcher:188=>0x1250cd0b0, _ChainNode:189=>0x1250cd070, finishChains:190=>0x1250ccd70, watchPath:191=>0x1250ccc70, unwatchPath:192=>0x1250ccc30, watch:193=>0x1250ccb70, isWatching:194=>0x1250ccb30, unwatch:195=>0x1250ccaf0, rewatch:196=>0x1250ccab0, destroy:197=>0x1250cca70, ComputedProperty:198=>0x1250cc8f0, computed:199=>0x1250cc5f0, cacheFor:200=>0x1250cc5b0, addObserver:201=>0x1250cbbf0, observersFor:202=>0x1250cbbb0, removeObserver:203=>0x1250cbb70, addBeforeObserver:204=>0x1250cbb30, _suspendBeforeObserver:205=>0x1250cbaf0, _suspendObserver:206=>0x1250cbab0, _suspendBeforeObservers:207=>0x1250cba70, _suspendObservers:208=>0x1250cba30, beforeObserversFor:209=>0x1250cb9f0, removeBeforeObserver:210=>0x1250cb9b0, run:211=>0x1250caff0, LOG_BINDINGS:212, isGlobalPath:213=>0x1250cabb0, Binding:214=>0x1250cab70, bind:215=>0x1250ca770, oneWay:216=>0x1250ca730, IS_BINDING:217, mixin:218=>0x1250ca1b0, Mixin:219=>0x1250ca170, anyUnprocessedMixins:220, required:221=>0x1250c9eb0, alias:222=>0x1250c9e30, aliasMethod:223=>0x1250c9df0, observer:224=>0x1250c9db0, immediateObserver:225=>0x1250c9d70, beforeObserver:226=>0x1250c9d30, libraries:227, MODEL_FACTORY_INJECTIONS:228, compare:229=>0x1250c9430, copy:230=>0x1250c93f0, inspect:231=>0x1250c93b0, isEqual:232=>0x1250c9370, ORDER_DEFINITION:233, keys:234=>0x1250c9330, STRINGS:235, String:236, Observable:237, CoreObject:238=>0x1250c87f0, Object:239=>0x1250c81f0, Namespace:240=>0x1250c7d30, NAME_KEY:241, ObjectProxy:242=>0x1250c78f0, Enumerable:243, Array:244, ReduceComputedProperty:245=>0x1250c66f0, reduceComputed:246=>0x1250c5f70, ArrayComputedProperty:247=>0x1250c5ef0, arrayComputed:248=>0x1250c5df0, RSVP:249, Comparable:250, Copyable:251, Freezable:252, FROZEN_ERROR:253, MutableEnumerable:254, MutableArray:255, TargetActionSupport:256, Evented:257, DeferredMixin:258, ActionHandler:259, PromiseProxyMixin:260, TrackedArray:261=>0x1250c35f0, SubArray:262=>0x1250c3330, Container:263=>0x1250c3130, Application:264, ArrayProxy:265=>0x1250c1eb0, EachProxy:266=>0x1250c1730, NativeArray:267, A:268, Set:269=>0x124f0fef0, Deferred:270=>0x124f0fcf0, onLoad:271=>0x124f0fab0, runLoadHooks:272=>0x124f0fa70, ControllerMixin:273, Controller:274=>0x124f0f8b0, SortableMixin:275, ArrayController:276=>0x124f0f130, ObjectController:277=>0x124f0ef30, $:278=>0x122bbb030, ViewUtils:279, RenderBuffer:280=>0x124f0e870, _RenderBuffer:281=>0x124f0e830, EventDispatcher:282=>0x124f0e1f0, TEMPLATES:283, CoreView:284=>0x124f0db70, _ViewCollection:285=>0x124f0d9b0, View:286=>0x124f0c7b0, ContainerView:287=>0x124f0af30, CollectionView:288=>0x124f0aa30, Component:289=>0x124f0a6b0, ViewTargetActionSupport:290, Handlebars:291, _Metamorph:292, _MetamorphView:293=>0x124f092b0, _SimpleMetamorphView:294=>0x124f090f0, _SimpleHandlebarsView:295=>0x124f08ef0, _HandlebarsBoundView:296=>0x124f08bf0, Checkbox:297=>0x124f078b0, TextSupport:298, TextField:299=>0x124f073f0, Button:300=>0x124f06ef0, TextArea:301=>0x124f06c70, SelectOption:302=>0x124f06930, SelectOptgroup:303=>0x124f06770, Select:304=>0x124f061b0, ComponentLookup:305=>0x124f05eb0, RouterDSL:306=>0x124f05a30, controllerFor:307=>0x124f05830, generateControllerFactory:308=>0x124f057f0, generateController:309=>0x124f057b0, Router:310=>0x124f036f0, Route:311=>0x124f02c30, LinkView:312=>0x124f02430, Location:313, NoneLocation:314=>0x124f01770, HashLocation:315=>0x124f013b0, HistoryLocation:316=>0x124f00ef0, DAG:317=>0x124f00c30, DefaultResolver:318=>0x124f00730, DataAdapter:319=>0x124f8f1b0, Test:320, StateManager:321, State:322, Date:323, Inflector:324=>0x124f847b0, __ember1394517308446_name:325, BOOTED:326}, NonArray, Proto:0x1140eee20] %C7:Window = 0x12538a870:[Window, {Object:100=>0x1144cd790, Function:101=>0x1144cd770, Array:102=>0x1144cd750, RegExp:103=>0x122aef970, EvalError:104=>0x1144cd610, RangeError:105=>0x1144cd5f0, ReferenceError:106=>0x1144cd5d0, SyntaxError:107=>0x1144cd5b0, TypeError:108=>0x1144cd590, URIError:109=>0x1144cd570, Promise:110=>0x1144cd550, Set:111=>0x1144cd730, Map:112=>0x1144cd710, Date:113=>0x1144cd6f0, String:114=>0x1144cd6d0, Boolean:115=>0x1144cd6b0, Number:116=>0x1144cd690, Error:117=>0x1144cd670, ArrayBuffer:118=>0x1144cd650, WeakMap:119=>0x1144cd630, ArrayIterator:120, ArgumentsIterator:121, MapIterator:122, SetIterator:123, eval:124=>0x122bbcb30, JSON:125, Math:126, DataView:127=>0x1144cd410, Float64Array:128=>0x1144cd430, Float32Array:129=>0x1144cd450, Uint32Array:130=>0x1144cd470, Int32Array:131=>0x1144cd4f0, Uint16Array:132=>0x1144cd490, Int16Array:133=>0x1144cd510, Uint8ClampedArray:134=>0x1144cd4b0, Uint8Array:135=>0x1144cd4d0, Int8Array:136=>0x1144cd530, console:137, doNotTrack:138, $:139=>0x122bbb030, jQuery:140=>0x122bbb030, Ember:141, Em:142, MetamorphENV:143, DS:144, Todos:145, parseFloat:146=>0x1253ce7f0}, NonArray, Proto:0x1140eee30] %CC:Function = 0x122b5aaf0:[Function, {name:100, length:101}, NonArray, Proto:0x1144cd810] %CK:Function = 0x122b5acf0:[Function, {}, NonArray, Proto:0x1144cd810] %Dw:string = 0x1140afd70:[string, {}, NonArray] %EF:Object = 0x12506e370:[Object, {queueNames:0, options:1, currentInstance:2, instanceStack:3, begin:4=>0x1250cb2f0, end:5=>0x1250cb2b0, run:6=>0x1250cb270, defer:7=>0x1250cb230, deferOnce:8=>0x1250cb1f0, setTimeout:9=>0x1250cb1b0, throttle:10=>0x1250cb170, debounce:11=>0x1250cb130, cancelTimers:12=>0x1250cb0f0, hasTimers:13=>0x1250cb0b0, cancel:14=>0x1250cb070, _cancelItem:15=>0x1250cb030, schedule:16=>0x1250cb230, scheduleOnce:17=>0x1250cb1f0, later:18=>0x1250cb1b0}, NonArray, Proto:0x1140eee20] %EH:Object = 0x125387270:[Object, {queueNames:0, options:1, instanceStack:2, currentInstance:3}, NonArray, Proto:0x124f7db70] %EL:JSActivation = 0x122b57370:[JSActivation, {}, NonArray] %Eg:Window = 0x1261e1270:[Window, {Object:100=>0x1144cd790, Function:101=>0x1144cd770, Array:102=>0x1144cd750, RegExp:103=>0x122aef970, EvalError:104=>0x1144cd610, RangeError:105=>0x1144cd5f0, ReferenceError:106=>0x1144cd5d0, SyntaxError:107=>0x1144cd5b0, TypeError:108=>0x1144cd590, URIError:109=>0x1144cd570, Promise:110=>0x1144cd550, Set:111=>0x1144cd730, Map:112=>0x1144cd710, Date:113=>0x1144cd6f0, String:114=>0x1144cd6d0, Boolean:115=>0x1144cd6b0, Number:116=>0x1144cd690, Error:117=>0x1144cd670, ArrayBuffer:118=>0x1144cd650, WeakMap:119=>0x1144cd630, ArrayIterator:120, ArgumentsIterator:121, MapIterator:122, SetIterator:123, eval:124=>0x122bbcb30, JSON:125, Math:126, DataView:127=>0x1144cd410, Float64Array:128=>0x1144cd430, Float32Array:129=>0x1144cd450, Uint32Array:130=>0x1144cd470, Int32Array:131=>0x1144cd4f0, Uint16Array:132=>0x1144cd490, Int16Array:133=>0x1144cd510, Uint8ClampedArray:134=>0x1144cd4b0, Uint8Array:135=>0x1144cd4d0, Int8Array:136=>0x1144cd530, console:137, doNotTrack:138, $:139=>0x122bbb030, jQuery:140=>0x122bbb030, Ember:141, Em:142, MetamorphENV:143, DS:144, Todos:145, parseFloat:146=>0x1253ce7f0, parseInt:147=>0x1253ccbf0, jQuery210069062883779406550.007350960746407509:148, isNaN:149=>0x1253c14f0}, NonArray, Proto:0x1140eee30] ASSERTION FAILED: node->op() == Phi || node->op() == SetArgument /Volumes/Data/WebKit-svn-01/OpenSource/Source/JavaScriptCore/dfg/DFGDCEPhase.cpp(266) : void JSC::DFG::DCEPhase::cleanVariables(VariablesVectorType &) [VariablesVectorType = JSC::Operands<JSC::DFG::Node *, JSC::DFG::NodePointerTraits>] 1 0x117eca8a0 WTFCrash 2 0x1179604fe void JSC::DFG::DCEPhase::cleanVariables<JSC::Operands<JSC::DFG::Node*, JSC::DFG::NodePointerTraits> >(JSC::Operands<JSC::DFG::Node*, JSC::DFG::NodePointerTraits>&) 3 0x11795fd40 JSC::DFG::DCEPhase::fixupBlock(JSC::DFG::BasicBlock*) 4 0x11795f89e JSC::DFG::DCEPhase::run() 5 0x11795ea75 bool JSC::DFG::runAndLog<JSC::DFG::DCEPhase>(JSC::DFG::DCEPhase&) 6 0x11795e9fe bool JSC::DFG::runPhase<JSC::DFG::DCEPhase>(JSC::DFG::Graph&) 7 0x11795e9b8 JSC::DFG::performDCE(JSC::DFG::Graph&) 8 0x117a14b60 JSC::DFG::Plan::compileInThreadImpl(JSC::DFG::LongLivedState&) 9 0x117a14294 JSC::DFG::Plan::compileInThread(JSC::DFG::LongLivedState&, JSC::DFG::ThreadData*) 10 0x117ab76e0 JSC::DFG::Worklist::runThread(JSC::DFG::ThreadData*) 11 0x117ab6334 JSC::DFG::Worklist::threadFunction(void*) 12 0x117f1a0c0 WTF::threadEntryPoint(void*) 13 0x117f1ad48 WTF::wtfThreadEntryPoint(void*) 14 0x7fff8c43b899 _pthread_body 15 0x7fff8c43b72a _pthread_struct_init 16 0x7fff8c43ffc9 thread_start ^C[31] $ LEAK: 1 WebPage LEAK: 1 WebFrame LEAK: 35692 WebCoreNode LEAK: 15 CachedResource
Filip Pizlo
Comment 5 2014-03-10 23:01:29 PDT
Thanks guys! I'm looking at this now...
Filip Pizlo
Comment 6 2014-03-10 23:09:35 PDT
I believe that the key issue is that the GetLocal corresponds to a captured variable.
Filip Pizlo
Comment 7 2014-03-10 23:51:27 PDT
Created attachment 226394 [details] the patch
Geoffrey Garen
Comment 8 2014-03-11 09:42:07 PDT
Comment on attachment 226394 [details] the patch View in context: https://bugs.webkit.org/attachment.cgi?id=226394&action=review r=me > Source/JavaScriptCore/dfg/DFGDCEPhase.cpp:264 > + // but we shouldn't bother. Not sure what you meant by "we shouldn't bother".
Ryosuke Niwa
Comment 9 2014-03-11 19:06:17 PDT
Comment on attachment 226394 [details] the patch View in context: https://bugs.webkit.org/attachment.cgi?id=226394&action=review > Source/JavaScriptCore/dfg/DFGDCEPhase.cpp:265 > + m_graph.dethread(); So Graph::dethread sets m_form to LoadStore. This results in an assertion failure inside fixupBlock for subsequent blocks because we're assuming that m_grpah.m_form is either SSA or ThreadedCPS in that function. We probably need to break out of the loop inside run() that iterates over code blocks when we're dethreading.
Filip Pizlo
Comment 10 2014-03-11 19:07:20 PDT
(In reply to comment #9) > (From update of attachment 226394 [details]) > View in context: https://bugs.webkit.org/attachment.cgi?id=226394&action=review > > > Source/JavaScriptCore/dfg/DFGDCEPhase.cpp:265 > > + m_graph.dethread(); > > So Graph::dethread sets m_form to LoadStore. This results in an assertion failure inside fixupBlock for subsequent blocks > because we're assuming that m_grpah.m_form is either SSA or ThreadedCPS in that function. > > We probably need to break out of the loop inside run() that iterates over code blocks when we're dethreading. No, we just need to add a "case LoadStore:" in fixupBlock. That case can fall through to ThreadedCPS.
Filip Pizlo
Comment 11 2014-03-11 21:26:59 PDT
Comment on attachment 226394 [details] the patch This is the wrong approach. Better patch coming shortly...
Filip Pizlo
Comment 12 2014-03-11 21:47:25 PDT
Created attachment 226471 [details] the patch
Ryosuke Niwa
Comment 13 2014-03-11 21:52:46 PDT
Comment on attachment 226471 [details] the patch Looks like this patch is missing a change log entry.
Filip Pizlo
Comment 14 2014-03-11 21:56:01 PDT
Created attachment 226472 [details] the patch
Geoffrey Garen
Comment 15 2014-03-12 09:41:16 PDT
Comment on attachment 226472 [details] the patch r=me
Filip Pizlo
Comment 16 2014-03-12 18:51:25 PDT
Landed in http://trac.webkit.org/changeset/165522
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