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<title>[185705] branches/safari-600.7-branch/Source/JavaScriptCore</title>
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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/185705">185705</a></dd>
<dt>Author</dt> <dd>bshafiei@apple.com</dd>
<dt>Date</dt> <dd>2015-06-18 10:39:52 -0700 (Thu, 18 Jun 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>Roll out patch for <a href="http://trac.webkit.org/projects/webkit/changeset/182827">r182827</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#branchessafari6007branchSourceJavaScriptCoreChangeLog">branches/safari-600.7-branch/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#branchessafari6007branchSourceJavaScriptCoredfgDFGSpeculativeJIT32_64cpp">branches/safari-600.7-branch/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp</a></li>
<li><a href="#branchessafari6007branchSourceJavaScriptCoredfgDFGSpeculativeJIT64cpp">branches/safari-600.7-branch/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="branchessafari6007branchSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: branches/safari-600.7-branch/Source/JavaScriptCore/ChangeLog (185704 => 185705)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.7-branch/Source/JavaScriptCore/ChangeLog 2015-06-18 17:15:50 UTC (rev 185704)
+++ branches/safari-600.7-branch/Source/JavaScriptCore/ChangeLog 2015-06-18 17:39:52 UTC (rev 185705)
</span><span class="lines">@@ -1,3 +1,7 @@
</span><ins>+2015-06-18 Babak Shafiei <bshafiei@apple.com>
+
+ Roll out patch for r182827.
+
</ins><span class="cx"> 2015-05-19 Babak Shafiei <bshafiei@apple.com>
</span><span class="cx">
</span><span class="cx"> Merge patch for r182827.
</span></span></pre></div>
<a id="branchessafari6007branchSourceJavaScriptCoredfgDFGSpeculativeJIT32_64cpp"></a>
<div class="modfile"><h4>Modified: branches/safari-600.7-branch/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp (185704 => 185705)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.7-branch/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp 2015-06-18 17:15:50 UTC (rev 185704)
+++ branches/safari-600.7-branch/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp 2015-06-18 17:39:52 UTC (rev 185705)
</span><span class="lines">@@ -731,16 +731,16 @@
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><span class="cx"> ASSERT(edge.useKind() != KnownInt32Use || !(value.m_type & ~SpecInt32));
</span><ins>+ m_interpreter.filter(value, SpecInt32);
+ VirtualRegister virtualRegister = edge->virtualRegister();
+ GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</ins><span class="cx">
</span><del>- if (m_interpreter.filter(value, SpecInt32) == Contradiction) {
</del><ins>+ if (edge->hasConstant() && !isInt32Constant(edge.node())) {
</ins><span class="cx"> terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
</span><span class="cx"> returnFormat = DataFormatInt32;
</span><span class="cx"> return allocate();
</span><span class="cx"> }
</span><del>-
- VirtualRegister virtualRegister = edge->virtualRegister();
- GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
-
</del><ins>+
</ins><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><span class="cx"> if (edge->hasConstant()) {
</span><span class="lines">@@ -754,7 +754,6 @@
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> DataFormat spillFormat = info.spillFormat();
</span><del>-
</del><span class="cx"> ASSERT_UNUSED(spillFormat, (spillFormat & DataFormatJS) || spillFormat == DataFormatInt32);
</span><span class="cx">
</span><span class="cx"> // If we know this was spilled as an integer we can fill without checking.
</span><span class="lines">@@ -800,6 +799,10 @@
</span><span class="cx"> case DataFormatJSDouble:
</span><span class="cx"> case DataFormatJSCell:
</span><span class="cx"> case DataFormatJSBoolean:
</span><ins>+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ returnFormat = DataFormatInt32;
+ return allocate();
+
</ins><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> default:
</span><span class="lines">@@ -858,17 +861,17 @@
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><span class="cx"> ASSERT((edge.useKind() != KnownCellUse && edge.useKind() != KnownStringUse) || !(value.m_type & ~SpecCell));
</span><del>-
- if (m_interpreter.filter(value, SpecCell) == Contradiction) {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
- }
-
</del><ins>+ m_interpreter.filter(value, SpecCell);
</ins><span class="cx"> VirtualRegister virtualRegister = edge->virtualRegister();
</span><span class="cx"> GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</span><span class="cx">
</span><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><ins>+ if (info.spillFormat() == DataFormatInt32) {
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return allocate();
+ }
+
</ins><span class="cx"> if (edge->hasConstant()) {
</span><span class="cx"> JSValue jsValue = valueOfJSConstant(edge.node());
</span><span class="cx"> GPRReg gpr = allocate();
</span><span class="lines">@@ -930,6 +933,9 @@
</span><span class="cx"> case DataFormatJSDouble:
</span><span class="cx"> case DataFormatJSBoolean:
</span><span class="cx"> case DataFormatBoolean:
</span><ins>+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return allocate();
+
</ins><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> RELEASE_ASSERT_NOT_REACHED();
</span><span class="lines">@@ -944,23 +950,27 @@
</span><span class="cx"> {
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><del>-
- if (m_interpreter.filter(value, SpecBoolean) == Contradiction) {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
- }
-
</del><ins>+ m_interpreter.filter(value, SpecBoolean);
</ins><span class="cx"> VirtualRegister virtualRegister = edge->virtualRegister();
</span><span class="cx"> GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</span><span class="cx">
</span><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><ins>+ if (info.spillFormat() == DataFormatInt32) {
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return allocate();
+ }
+
</ins><span class="cx"> if (edge->hasConstant()) {
</span><span class="cx"> JSValue jsValue = valueOfJSConstant(edge.node());
</span><span class="cx"> GPRReg gpr = allocate();
</span><del>- m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
- m_jit.move(MacroAssembler::TrustedImm32(jsValue.asBoolean()), gpr);
- info.fillBoolean(*m_stream, gpr);
</del><ins>+ if (jsValue.isBoolean()) {
+ m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
+ m_jit.move(MacroAssembler::TrustedImm32(jsValue.asBoolean()), gpr);
+ info.fillBoolean(*m_stream, gpr);
+ return gpr;
+ }
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
</ins><span class="cx"> return gpr;
</span><span class="cx"> }
</span><span class="cx">
</span><span class="lines">@@ -1004,6 +1014,9 @@
</span><span class="cx"> case DataFormatJSDouble:
</span><span class="cx"> case DataFormatJSCell:
</span><span class="cx"> case DataFormatCell:
</span><ins>+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return allocate();
+
</ins><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> RELEASE_ASSERT_NOT_REACHED();
</span></span></pre></div>
<a id="branchessafari6007branchSourceJavaScriptCoredfgDFGSpeculativeJIT64cpp"></a>
<div class="modfile"><h4>Modified: branches/safari-600.7-branch/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp (185704 => 185705)</h4>
<pre class="diff"><span>
<span class="info">--- branches/safari-600.7-branch/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp 2015-06-18 17:15:50 UTC (rev 185704)
+++ branches/safari-600.7-branch/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp 2015-06-18 17:39:52 UTC (rev 185705)
</span><span class="lines">@@ -721,16 +721,20 @@
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><span class="cx"> ASSERT(edge.useKind() != KnownInt32Use || !(value.m_type & ~SpecInt32));
</span><ins>+ m_interpreter.filter(value, SpecInt32);
+ VirtualRegister virtualRegister = edge->virtualRegister();
+ GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</ins><span class="cx">
</span><del>- if (m_interpreter.filter(value, SpecInt32) == Contradiction) {
</del><ins>+ if (edge->hasConstant() && !isInt32Constant(edge.node())) {
+ // Protect the silent spill/fill logic by failing early. If we "speculate" on
+ // the constant then the silent filler may think that we have an int32 and a
+ // constant, so it will try to fill this as an int32 constant. Bad things will
+ // happen.
</ins><span class="cx"> terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
</span><span class="cx"> returnFormat = DataFormatInt32;
</span><span class="cx"> return allocate();
</span><span class="cx"> }
</span><del>-
- VirtualRegister virtualRegister = edge->virtualRegister();
- GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
-
</del><ins>+
</ins><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><span class="cx"> GPRReg gpr = allocate();
</span><span class="lines">@@ -829,7 +833,12 @@
</span><span class="cx"> case DataFormatCell:
</span><span class="cx"> case DataFormatBoolean:
</span><span class="cx"> case DataFormatJSCell:
</span><del>- case DataFormatJSBoolean:
</del><ins>+ case DataFormatJSBoolean: {
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ returnFormat = DataFormatInt32;
+ return allocate();
+ }
+
</ins><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> case DataFormatInt52:
</span><span class="lines">@@ -862,17 +871,17 @@
</span><span class="cx"> {
</span><span class="cx"> ASSERT(desiredFormat == DataFormatInt52 || desiredFormat == DataFormatStrictInt52);
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><del>-
- if (m_interpreter.filter(value, SpecMachineInt) == Contradiction) {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
- }
-
</del><ins>+ m_interpreter.filter(value, SpecMachineInt);
</ins><span class="cx"> VirtualRegister virtualRegister = edge->virtualRegister();
</span><span class="cx"> GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</span><span class="cx">
</span><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><ins>+ if ((edge->hasConstant() && !valueOfJSConstant(edge.node()).isMachineInt())) {
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return allocate();
+ }
+
</ins><span class="cx"> GPRReg gpr = allocate();
</span><span class="cx">
</span><span class="cx"> if (edge->hasConstant()) {
</span><span class="lines">@@ -991,12 +1000,7 @@
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><span class="cx"> ASSERT((edge.useKind() != KnownCellUse && edge.useKind() != KnownStringUse) || !(value.m_type & ~SpecCell));
</span><del>-
- if (m_interpreter.filter(value, SpecCell) == Contradiction) {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
- }
-
</del><ins>+ m_interpreter.filter(value, SpecCell);
</ins><span class="cx"> VirtualRegister virtualRegister = edge->virtualRegister();
</span><span class="cx"> GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</span><span class="cx">
</span><span class="lines">@@ -1015,7 +1019,12 @@
</span><span class="cx"> terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
</span><span class="cx"> return gpr;
</span><span class="cx"> }
</span><del>-
</del><ins>+
+ if (!(info.spillFormat() & DataFormatJS)) {
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return gpr;
+ }
+
</ins><span class="cx"> m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
</span><span class="cx"> m_jit.load64(JITCompiler::addressFor(virtualRegister), gpr);
</span><span class="cx">
</span><span class="lines">@@ -1051,7 +1060,11 @@
</span><span class="cx"> case DataFormatInt32:
</span><span class="cx"> case DataFormatJSDouble:
</span><span class="cx"> case DataFormatJSBoolean:
</span><del>- case DataFormatBoolean:
</del><ins>+ case DataFormatBoolean: {
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return allocate();
+ }
+
</ins><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> case DataFormatInt52:
</span><span class="lines">@@ -1068,24 +1081,28 @@
</span><span class="cx"> {
</span><span class="cx"> AbstractValue& value = m_state.forNode(edge);
</span><span class="cx"> SpeculatedType type = value.m_type;
</span><del>-
- if (m_interpreter.filter(value, SpecBoolean) == Contradiction) {
- terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
- return allocate();
- }
-
</del><ins>+ m_interpreter.filter(value, SpecBoolean);
</ins><span class="cx"> VirtualRegister virtualRegister = edge->virtualRegister();
</span><span class="cx"> GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
</span><span class="cx">
</span><span class="cx"> switch (info.registerFormat()) {
</span><span class="cx"> case DataFormatNone: {
</span><ins>+ if (info.spillFormat() == DataFormatInt32) {
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return allocate();
+ }
+
</ins><span class="cx"> GPRReg gpr = allocate();
</span><span class="cx">
</span><span class="cx"> if (edge->hasConstant()) {
</span><span class="cx"> JSValue jsValue = valueOfJSConstant(edge.node());
</span><del>- m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
- m_jit.move(MacroAssembler::TrustedImm64(JSValue::encode(jsValue)), gpr);
- info.fillJSValue(*m_stream, gpr, DataFormatJSBoolean);
</del><ins>+ if (jsValue.isBoolean()) {
+ m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
+ m_jit.move(MacroAssembler::TrustedImm64(JSValue::encode(jsValue)), gpr);
+ info.fillJSValue(*m_stream, gpr, DataFormatJSBoolean);
+ return gpr;
+ }
+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
</ins><span class="cx"> return gpr;
</span><span class="cx"> }
</span><span class="cx"> RELEASE_ASSERT(info.spillFormat() & DataFormatJS);
</span><span class="lines">@@ -1126,6 +1143,9 @@
</span><span class="cx"> case DataFormatJSDouble:
</span><span class="cx"> case DataFormatJSCell:
</span><span class="cx"> case DataFormatCell:
</span><ins>+ terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
+ return allocate();
+
</ins><span class="cx"> case DataFormatDouble:
</span><span class="cx"> case DataFormatStorage:
</span><span class="cx"> case DataFormatInt52:
</span></span></pre>
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