Spam static branch prediction hints on JS bindings.

<https://webkit.org/b/129703>

Source/JavaScriptCore:

Add LIKELY hint to jsDynamicCast since it's always used in a context
where we expect it to succeed and takes an error path when it doesn't.

Reviewed by Geoff Garen.

* runtime/JSCell.h:
(JSC::jsDynamicCast):

Source/WebCore:

Add UNLIKELY hints to all !castedThis and exec->hadException() paths
in the JS bindings since they are almost always going to get skipped.

Reviewed by Geoff Garen.

* bindings/scripts/CodeGeneratorJS.pm:
(GenerateImplementation):
(GenerateParametersCheck):
(GenerateImplementationFunctionCall):
(GenerateConstructorDefinition):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@165079 268f45cc-cd09-0410-ab3c-d52691b4dbfc

diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
index 497f35792d757be313be59fb386a64c41ed52f6b..845ec4e30cc0085221545b1bdfac13702e3772b0 100644 (file)
--- a/Source/JavaScriptCore/ChangeLog
+++ b/Source/JavaScriptCore/ChangeLog
@@ -1,3 +1,16 @@
+2014-03-04  Andreas Kling  <akling@apple.com>
+
+        Spam static branch prediction hints on JS bindings.
+        <https://webkit.org/b/129703>
+
+        Add LIKELY hint to jsDynamicCast since it's always used in a context
+        where we expect it to succeed and takes an error path when it doesn't.
+
+        Reviewed by Geoff Garen.
+
+        * runtime/JSCell.h:
+        (JSC::jsDynamicCast):
+
 2014-03-04  Andreas Kling  <akling@apple.com>
 
         Get to Structures more efficiently in JSCell::methodTable().

diff --git a/Source/JavaScriptCore/runtime/JSCell.h b/Source/JavaScriptCore/runtime/JSCell.h
index 75622cba9c635987e480daca8ad4c18bcfd03e73..bb25d4639e58c897fd18a907cb66ff159cd545df 100644 (file)
--- a/Source/JavaScriptCore/runtime/JSCell.h
+++ b/Source/JavaScriptCore/runtime/JSCell.h
@@ -215,13 +215,17 @@ inline To jsCast(JSValue from)
 template<typename To, typename From>
 inline To jsDynamicCast(From* from)
 {
-    return from->inherits(std::remove_pointer<To>::type::info()) ? static_cast<To>(from) : 0;
+    if (LIKELY(from->inherits(std::remove_pointer<To>::type::info())))
+        return static_cast<To>(from);
+    return nullptr;
 }
 
 template<typename To>
 inline To jsDynamicCast(JSValue from)
 {
-    return from.isCell() && from.asCell()->inherits(std::remove_pointer<To>::type::info()) ? static_cast<To>(from.asCell()) : 0;
+    if (LIKELY(from.isCell() && from.asCell()->inherits(std::remove_pointer<To>::type::info())))
+        return static_cast<To>(from.asCell());
+    return nullptr;
 }
 
 } // namespace JSC

diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
index 7c98352f005e42f84a1ebcad7bd1a0b5562d700a..1a582f2526dee8ba0e92c55d756cafafec51fbb1 100644 (file)
--- a/Source/WebCore/ChangeLog
+++ b/Source/WebCore/ChangeLog
@@ -1,3 +1,19 @@
+2014-03-04  Andreas Kling  <akling@apple.com>
+
+        Spam static branch prediction hints on JS bindings.
+        <https://webkit.org/b/129703>
+
+        Add UNLIKELY hints to all !castedThis and exec->hadException() paths
+        in the JS bindings since they are almost always going to get skipped.
+
+        Reviewed by Geoff Garen.
+
+        * bindings/scripts/CodeGeneratorJS.pm:
+        (GenerateImplementation):
+        (GenerateParametersCheck):
+        (GenerateImplementationFunctionCall):
+        (GenerateConstructorDefinition):
+
 2014-03-04  Adenilson Cavalcanti  <cavalcantii@gmail.com>
 
         Remove unused StdDeviation from Gaussian Blur effect

diff --git a/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm b/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
index 3caf6dc0361ed64e765ddf3376758b376c071bb9..1ae7c5a1303f044f6c81021abb8c3be68674301a 100644 (file)
--- a/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
+++ b/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
@@ -2128,7 +2128,7 @@ sub GenerateImplementation
             if (!$attribute->isStatic || $attribute->signature->type =~ /Constructor$/) {
                 if ($interfaceName eq "DOMWindow") {
                     push(@implContent, "    ${className}* castedThis = jsDynamicCast<$className*>(JSValue::decode(thisValue));\n");
-                    push(@implContent, "    if (!castedThis) {\n");
+                    push(@implContent, "    if (UNLIKELY(!castedThis)) {\n");
                     push(@implContent, "        if (JSDOMWindowShell* shell = jsDynamicCast<JSDOMWindowShell*>(JSValue::decode(thisValue)))\n");
                     push(@implContent, "            castedThis = shell->window();\n");
                     push(@implContent, "    }\n");
@@ -2138,7 +2138,7 @@ sub GenerateImplementation
                     push(@implContent, "    UNUSED_PARAM(slotBase);\n");
                 }
                 $implIncludes{"ScriptExecutionContext.h"} = 1;
-                push(@implContent, "    if (!castedThis) {\n");
+                push(@implContent, "    if (UNLIKELY(!castedThis)) {\n");
                 push(@implContent, "        if (jsDynamicCast<${className}Prototype*>(slotBase)) {\n");
                 push(@implContent, "            ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();\n");
                 push(@implContent, "            scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String(\"Deprecated attempt to access property '$name' on a non-$interfaceName object.\"));\n");
@@ -2345,12 +2345,12 @@ sub GenerateImplementation
             push(@implContent, "    JSValue value = JSValue::decode(encodedValue);");
             push(@implContent, "    ${className}* castedThis = jsDynamicCast<${className}*>(JSValue::decode(thisValue));\n");
             if ($interfaceName eq "DOMWindow") {
-                push(@implContent, "    if (!castedThis) {\n");
+                push(@implContent, "    if (UNLIKELY(!castedThis)) {\n");
                 push(@implContent, "        if (JSDOMWindowShell* shell = jsDynamicCast<JSDOMWindowShell*>(JSValue::decode(thisValue)))\n");
                 push(@implContent, "            castedThis = shell->window();\n");
                 push(@implContent, "    }\n");
             }
-            push(@implContent, "    if (!castedThis) {\n");
+            push(@implContent, "    if (UNLIKELY(!castedThis)) {\n");
             push(@implContent, "        throwVMTypeError(exec);\n");
             push(@implContent, "        return;\n");
             push(@implContent, "    }\n");
@@ -2454,12 +2454,12 @@ sub GenerateImplementation
                 if (!$attribute->isStatic) {
                     push(@implContent, "    ${className}* castedThis = jsDynamicCast<${className}*>(JSValue::decode(thisValue));\n");
                     if ($interfaceName eq "DOMWindow") {
-                        push(@implContent, "    if (!castedThis) {\n");
+                        push(@implContent, "    if (UNLIKELY(!castedThis)) {\n");
                         push(@implContent, "        if (JSDOMWindowShell* shell = jsDynamicCast<JSDOMWindowShell*>(JSValue::decode(thisValue)))\n");
                         push(@implContent, "            castedThis = shell->window();\n");
                         push(@implContent, "    }\n");
                     }
-                    push(@implContent, "    if (!castedThis) {\n");
+                    push(@implContent, "    if (UNLIKELY(!castedThis)) {\n");
                     push(@implContent, "        throwVMTypeError(exec);\n");
                     push(@implContent, "        return;\n");
                     push(@implContent, "    }\n");
@@ -2528,7 +2528,7 @@ sub GenerateImplementation
                     }
 
                     push(@implContent, "    " . GetNativeTypeFromSignature($attribute->signature) . " nativeValue(" . JSValueToNative($attribute->signature, "value") . ");\n");
-                    push(@implContent, "    if (exec->hadException())\n");
+                    push(@implContent, "    if (UNLIKELY(exec->hadException()))\n");
                     push(@implContent, "        return;\n");
 
                     if ($codeGenerator->IsEnumType($type)) {
@@ -2684,16 +2684,16 @@ sub GenerateImplementation
             } else {
                 if ($interfaceName eq "DOMWindow") {
                     push(@implContent, "    $className* castedThis = toJSDOMWindow(exec->hostThisValue().toThis(exec, NotStrictMode));\n");
-                    push(@implContent, "    if (!castedThis)\n");
+                    push(@implContent, "    if (UNLIKELY(!castedThis))\n");
                     push(@implContent, "        return throwVMTypeError(exec);\n");
                 } elsif ($interface->extendedAttributes->{"WorkerGlobalScope"}) {
                     push(@implContent, "    $className* castedThis = to${className}(exec->hostThisValue().toThis(exec, NotStrictMode));\n");
-                    push(@implContent, "    if (!castedThis)\n");
+                    push(@implContent, "    if (UNLIKELY(!castedThis))\n");
                     push(@implContent, "        return throwVMTypeError(exec);\n");
                 } else {
                     push(@implContent, "    JSValue thisValue = exec->hostThisValue();\n");
                     push(@implContent, "    $className* castedThis = jsDynamicCast<$className*>(thisValue);\n");
-                    push(@implContent, "    if (!castedThis)\n");
+                    push(@implContent, "    if (UNLIKELY(!castedThis))\n");
                     push(@implContent, "        return throwVMTypeError(exec);\n");
                 }
 
@@ -3173,7 +3173,7 @@ sub GenerateParametersCheck
             push(@$outputArray, "    XPathNSResolver* resolver = toXPathNSResolver(exec->argument($argsIndex));\n");
             push(@$outputArray, "    if (!resolver) {\n");
             push(@$outputArray, "        customResolver = JSCustomXPathNSResolver::create(exec, exec->argument($argsIndex));\n");
-            push(@$outputArray, "        if (exec->hadException())\n");
+            push(@$outputArray, "        if (UNLIKELY(exec->hadException()))\n");
             push(@$outputArray, "            return JSValue::encode(jsUndefined());\n");
             push(@$outputArray, "        resolver = customResolver.get();\n");
             push(@$outputArray, "    }\n");
@@ -3206,7 +3206,7 @@ sub GenerateParametersCheck
             my $nativeValue = "${name}NativeValue";
             push(@$outputArray, "    $argType $name = 0;\n");
             push(@$outputArray, "    double $nativeValue = exec->argument($argsIndex).toNumber(exec);\n");
-            push(@$outputArray, "    if (exec->hadException())\n");
+            push(@$outputArray, "    if (UNLIKELY(exec->hadException()))\n");
             push(@$outputArray, "        return JSValue::encode(jsUndefined());\n\n");
             push(@$outputArray, "    if (!std::isnan($nativeValue))\n");
             push(@$outputArray, "        $name = clampTo<$argType>($nativeValue);\n\n");
@@ -3231,7 +3231,7 @@ sub GenerateParametersCheck
             } else {
                 push(@$outputArray, "    Vector<$nativeElementType> $name = toNativeArguments<$nativeElementType>(exec, $argsIndex);\n");
                 # Check if the type conversion succeeded.
-                push(@$outputArray, "    if (exec->hadException())\n");
+                push(@$outputArray, "    if (UNLIKELY(exec->hadException()))\n");
                 push(@$outputArray, "        return JSValue::encode(jsUndefined());\n");
             }
 
@@ -3240,7 +3240,7 @@ sub GenerateParametersCheck
 
             my $argValue = "exec->argument($argsIndex)";
             push(@$outputArray, "    const String ${name}(${argValue}.isEmpty() ? String() : ${argValue}.toString(exec)->value(exec));\n");
-            push(@$outputArray, "    if (exec->hadException())\n");
+            push(@$outputArray, "    if (UNLIKELY(exec->hadException()))\n");
             push(@$outputArray, "        return JSValue::encode(jsUndefined());\n");
 
             my @enumValues = $codeGenerator->ValidEnumValues($argType);
@@ -3279,7 +3279,7 @@ sub GenerateParametersCheck
             }
 
             # Check if the type conversion succeeded.
-            push(@$outputArray, "    if (exec->hadException())\n");
+            push(@$outputArray, "    if (UNLIKELY(exec->hadException()))\n");
             push(@$outputArray, "        return JSValue::encode(jsUndefined());\n");
 
             if ($codeGenerator->IsSVGTypeNeedingTearOff($argType) and not $interfaceName =~ /List$/) {
@@ -3526,7 +3526,7 @@ sub GenerateImplementationFunctionCall()
         push(@implContent, $indent . "setDOMException(exec, ec);\n") if $raisesException;
 
         if ($codeGenerator->ExtendedAttributeContains($function->signature->extendedAttributes->{"CallWith"}, "ScriptState")) {
-            push(@implContent, $indent . "if (exec->hadException())\n");
+            push(@implContent, $indent . "if (UNLIKELY(exec->hadException()))\n");
             push(@implContent, $indent . "    return JSValue::encode(jsUndefined());\n");
         }
 
@@ -4271,7 +4271,7 @@ EncodedJSValue JSC_HOST_CALL ${constructorClassName}::construct${className}(Exec
         return throwVMError(exec, createReferenceError(exec, "Constructor associated execution context is unavailable"));
 
     AtomicString eventType = exec->argument(0).toString(exec)->value(exec);
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     ${interfaceName}Init eventInit;

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestActiveDOMObject.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestActiveDOMObject.cpp
index 3cfbffec4f0473fb34fab356a0c49930fb3eaceb..40c4b6c2bc3c2b3b36ac0614a423866ae96a9d0b 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestActiveDOMObject.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestActiveDOMObject.cpp
@@ -135,7 +135,7 @@ EncodedJSValue jsTestActiveDOMObjectExcitingAttr(ExecState* exec, JSObject* slot
 {
     JSTestActiveDOMObject* castedThis = jsDynamicCast<JSTestActiveDOMObject*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestActiveDOMObjectPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'excitingAttr' on a non-TestActiveDOMObject object."));
@@ -173,7 +173,7 @@ EncodedJSValue JSC_HOST_CALL jsTestActiveDOMObjectPrototypeFunctionExcitingFunct
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestActiveDOMObject* castedThis = jsDynamicCast<JSTestActiveDOMObject*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestActiveDOMObject::info());
     if (!BindingSecurity::shouldAllowAccessToDOMWindow(exec, castedThis->impl()))
@@ -182,7 +182,7 @@ EncodedJSValue JSC_HOST_CALL jsTestActiveDOMObjectPrototypeFunctionExcitingFunct
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Node* nextChild(toNode(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.excitingFunction(nextChild);
     return JSValue::encode(jsUndefined());
@@ -192,14 +192,14 @@ EncodedJSValue JSC_HOST_CALL jsTestActiveDOMObjectPrototypeFunctionPostMessage(E
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestActiveDOMObject* castedThis = jsDynamicCast<JSTestActiveDOMObject*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestActiveDOMObject::info());
     TestActiveDOMObject& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     const String& message(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.postMessage(message);
     return JSValue::encode(jsUndefined());

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestCustomNamedGetter.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestCustomNamedGetter.cpp
index 76e6f21f734b0a8226887040394d2d543e814538..da1f0d2e8d17c0dac481d51741e7009b3a5e0864 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestCustomNamedGetter.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestCustomNamedGetter.cpp
@@ -163,14 +163,14 @@ EncodedJSValue JSC_HOST_CALL jsTestCustomNamedGetterPrototypeFunctionAnotherFunc
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestCustomNamedGetter* castedThis = jsDynamicCast<JSTestCustomNamedGetter*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestCustomNamedGetter::info());
     TestCustomNamedGetter& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     const String& str(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.anotherFunction(str);
     return JSValue::encode(jsUndefined());

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestEventConstructor.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestEventConstructor.cpp
index cf73b6d03b50b019b92d0ca22cbf203f236848e0..a5d94f3d3f409f4ed33c3d2b13084f245485cf4d 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestEventConstructor.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestEventConstructor.cpp
@@ -50,7 +50,7 @@ EncodedJSValue JSC_HOST_CALL JSTestEventConstructorConstructor::constructJSTestE
         return throwVMError(exec, createReferenceError(exec, "Constructor associated execution context is unavailable"));
 
     AtomicString eventType = exec->argument(0).toString(exec)->value(exec);
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     TestEventConstructorInit eventInit;
@@ -170,7 +170,7 @@ EncodedJSValue jsTestEventConstructorAttr1(ExecState* exec, JSObject* slotBase,
 {
     JSTestEventConstructor* castedThis = jsDynamicCast<JSTestEventConstructor*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestEventConstructorPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'attr1' on a non-TestEventConstructor object."));
@@ -189,7 +189,7 @@ EncodedJSValue jsTestEventConstructorAttr2(ExecState* exec, JSObject* slotBase,
 {
     JSTestEventConstructor* castedThis = jsDynamicCast<JSTestEventConstructor*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestEventConstructorPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'attr2' on a non-TestEventConstructor object."));

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.cpp
index 774462c0c87a1a0d4b1849eac07a993970c715e6..bc8bc573fcfee0c7a48eedf503fcb7c0c67f0acc 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestEventTarget.cpp
@@ -197,7 +197,7 @@ EncodedJSValue JSC_HOST_CALL jsTestEventTargetPrototypeFunctionItem(ExecState* e
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestEventTarget* castedThis = jsDynamicCast<JSTestEventTarget*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestEventTarget::info());
     TestEventTarget& impl = castedThis->impl();
@@ -208,7 +208,7 @@ EncodedJSValue JSC_HOST_CALL jsTestEventTargetPrototypeFunctionItem(ExecState* e
         setDOMException(exec, INDEX_SIZE_ERR);
         return JSValue::encode(jsUndefined());
     }
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.item(index)));
@@ -219,7 +219,7 @@ EncodedJSValue JSC_HOST_CALL jsTestEventTargetPrototypeFunctionAddEventListener(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestEventTarget* castedThis = jsDynamicCast<JSTestEventTarget*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestEventTarget::info());
     TestEventTarget& impl = castedThis->impl();
@@ -234,7 +234,7 @@ EncodedJSValue JSC_HOST_CALL jsTestEventTargetPrototypeFunctionRemoveEventListen
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestEventTarget* castedThis = jsDynamicCast<JSTestEventTarget*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestEventTarget::info());
     TestEventTarget& impl = castedThis->impl();
@@ -249,7 +249,7 @@ EncodedJSValue JSC_HOST_CALL jsTestEventTargetPrototypeFunctionDispatchEvent(Exe
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestEventTarget* castedThis = jsDynamicCast<JSTestEventTarget*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestEventTarget::info());
     TestEventTarget& impl = castedThis->impl();
@@ -257,7 +257,7 @@ EncodedJSValue JSC_HOST_CALL jsTestEventTargetPrototypeFunctionDispatchEvent(Exe
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     ExceptionCode ec = 0;
     Event* evt(toEvent(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = jsBoolean(impl.dispatchEvent(evt, ec));

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestException.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestException.cpp
index c4a84974e639bc4a437da7db12156eddc05cc92e..d4cf4939e31b8e9821edc29f9c83970668095448 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestException.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestException.cpp
@@ -131,7 +131,7 @@ EncodedJSValue jsTestExceptionName(ExecState* exec, JSObject* slotBase, EncodedJ
 {
     JSTestException* castedThis = jsDynamicCast<JSTestException*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestExceptionPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'name' on a non-TestException object."));

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestInterface.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestInterface.cpp
index 0c530f5133fbb1b8650d7981d74de1dabf7e6431..02c7499412a08d64fd0169f8fb7673bbdead9a70 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestInterface.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestInterface.cpp
@@ -121,10 +121,10 @@ EncodedJSValue JSC_HOST_CALL JSTestInterfaceConstructor::constructJSTestInterfac
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     ExceptionCode ec = 0;
     const String& str1(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     const String& str2(exec->argument(1).isEmpty() ? String() : exec->argument(1).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     ScriptExecutionContext* context = castedThis->scriptExecutionContext();
     if (!context)
@@ -301,7 +301,7 @@ EncodedJSValue jsTestInterfaceImplementsStr1(ExecState* exec, JSObject* slotBase
 {
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'implementsStr1' on a non-TestInterface object."));
@@ -322,7 +322,7 @@ EncodedJSValue jsTestInterfaceImplementsStr2(ExecState* exec, JSObject* slotBase
 {
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'implementsStr2' on a non-TestInterface object."));
@@ -343,7 +343,7 @@ EncodedJSValue jsTestInterfaceImplementsStr3(ExecState* exec, JSObject* slotBase
 {
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'implementsStr3' on a non-TestInterface object."));
@@ -361,7 +361,7 @@ EncodedJSValue jsTestInterfaceImplementsNode(ExecState* exec, JSObject* slotBase
 {
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'implementsNode' on a non-TestInterface object."));
@@ -406,7 +406,7 @@ EncodedJSValue jsTestInterfaceSupplementalStr1(ExecState* exec, JSObject* slotBa
 {
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'supplementalStr1' on a non-TestInterface object."));
@@ -427,7 +427,7 @@ EncodedJSValue jsTestInterfaceSupplementalStr2(ExecState* exec, JSObject* slotBa
 {
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'supplementalStr2' on a non-TestInterface object."));
@@ -448,7 +448,7 @@ EncodedJSValue jsTestInterfaceSupplementalStr3(ExecState* exec, JSObject* slotBa
 {
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'supplementalStr3' on a non-TestInterface object."));
@@ -466,7 +466,7 @@ EncodedJSValue jsTestInterfaceSupplementalNode(ExecState* exec, JSObject* slotBa
 {
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'supplementalNode' on a non-TestInterface object."));
@@ -518,7 +518,7 @@ void setJSTestInterfaceConstructorImplementsStaticAttr(ExecState* exec, JSObject
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     const String& nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     TestInterface::setImplementsStaticAttr(nativeValue);
 }
@@ -531,13 +531,13 @@ void setJSTestInterfaceImplementsStr2(ExecState* exec, JSObject* /* baseObject *
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestInterface& impl = castedThis->impl();
     const String& nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setImplementsStr2(nativeValue);
 }
@@ -550,7 +550,7 @@ void setJSTestInterfaceImplementsStr3(ExecState* exec, JSObject* /* baseObject *
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
@@ -565,13 +565,13 @@ void setJSTestInterfaceImplementsNode(ExecState* exec, JSObject* /* baseObject *
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestInterface& impl = castedThis->impl();
     Node* nativeValue(toNode(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setImplementsNode(nativeValue);
 }
@@ -584,7 +584,7 @@ void setJSTestInterfaceConstructorSupplementalStaticAttr(ExecState* exec, JSObje
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     const String& nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     TestSupplemental::setSupplementalStaticAttr(nativeValue);
 }
@@ -597,13 +597,13 @@ void setJSTestInterfaceSupplementalStr2(ExecState* exec, JSObject* /* baseObject
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestInterface& impl = castedThis->impl();
     const String& nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     TestSupplemental::setSupplementalStr2(&impl, nativeValue);
 }
@@ -616,7 +616,7 @@ void setJSTestInterfaceSupplementalStr3(ExecState* exec, JSObject* /* baseObject
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
@@ -631,13 +631,13 @@ void setJSTestInterfaceSupplementalNode(ExecState* exec, JSObject* /* baseObject
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestInterface& impl = castedThis->impl();
     Node* nativeValue(toNode(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     TestSupplemental::setSupplementalNode(&impl, nativeValue);
 }
@@ -654,7 +654,7 @@ EncodedJSValue JSC_HOST_CALL jsTestInterfacePrototypeFunctionImplementsMethod1(E
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestInterface::info());
     TestInterface& impl = castedThis->impl();
@@ -669,7 +669,7 @@ EncodedJSValue JSC_HOST_CALL jsTestInterfacePrototypeFunctionImplementsMethod2(E
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestInterface::info());
     TestInterface& impl = castedThis->impl();
@@ -680,10 +680,10 @@ EncodedJSValue JSC_HOST_CALL jsTestInterfacePrototypeFunctionImplementsMethod2(E
     if (!scriptContext)
         return JSValue::encode(jsUndefined());
     const String& strArg(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     TestObj* objArg(toTestObj(exec->argument(1)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.implementsMethod2(scriptContext, strArg, objArg, ec)));
@@ -698,7 +698,7 @@ EncodedJSValue JSC_HOST_CALL jsTestInterfacePrototypeFunctionImplementsMethod3(E
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestInterface::info());
     return JSValue::encode(castedThis->implementsMethod3(exec));
@@ -720,7 +720,7 @@ EncodedJSValue JSC_HOST_CALL jsTestInterfacePrototypeFunctionSupplementalMethod1
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestInterface::info());
     TestInterface& impl = castedThis->impl();
@@ -735,7 +735,7 @@ EncodedJSValue JSC_HOST_CALL jsTestInterfacePrototypeFunctionSupplementalMethod2
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestInterface::info());
     TestInterface& impl = castedThis->impl();
@@ -746,10 +746,10 @@ EncodedJSValue JSC_HOST_CALL jsTestInterfacePrototypeFunctionSupplementalMethod2
     if (!scriptContext)
         return JSValue::encode(jsUndefined());
     const String& strArg(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     TestObj* objArg(toTestObj(exec->argument(1)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(TestSupplemental::supplementalMethod2(&impl, scriptContext, strArg, objArg, ec)));
@@ -764,7 +764,7 @@ EncodedJSValue JSC_HOST_CALL jsTestInterfacePrototypeFunctionSupplementalMethod3
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestInterface* castedThis = jsDynamicCast<JSTestInterface*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestInterface::info());
     return JSValue::encode(castedThis->supplementalMethod3(exec));

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestMediaQueryListListener.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestMediaQueryListListener.cpp
index 6f33e85d7100f4ad5965a4ef8e08fc94029d3704..09113bd993d2a9efd3d294a5eadae8f71966eca6 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestMediaQueryListListener.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestMediaQueryListListener.cpp
@@ -139,7 +139,7 @@ EncodedJSValue JSC_HOST_CALL jsTestMediaQueryListListenerPrototypeFunctionMethod
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestMediaQueryListListener* castedThis = jsDynamicCast<JSTestMediaQueryListListener*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestMediaQueryListListener::info());
     TestMediaQueryListListener& impl = castedThis->impl();

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedConstructor.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedConstructor.cpp
index b5449860398193b10f0431fa1a3663e42f844ba5..a5fd36965557832b4baca94ffaa6ce718ab1b058 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestNamedConstructor.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestNamedConstructor.cpp
@@ -66,13 +66,13 @@ EncodedJSValue JSC_HOST_CALL JSTestNamedConstructorNamedConstructor::constructJS
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     ExceptionCode ec = 0;
     const String& str1(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     const String& str2(exec->argument(1).isEmpty() ? String() : exec->argument(1).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     const String& str3(argumentOrNull(exec, 2).isEmpty() ? String() : argumentOrNull(exec, 2).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     RefPtr<TestNamedConstructor> object = TestNamedConstructor::createForJSConstructor(*castedThis->document(), str1, str2, str3, ec);
     if (ec) {

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp
index c1f1c7fcdc37c7dce8d6324bdeb2b3c1ff5311c6..366366ed9b40c13a430ad9652f0c9adc2346e834 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp
@@ -397,7 +397,7 @@ EncodedJSValue jsTestObjReadOnlyLongAttr(ExecState* exec, JSObject* slotBase, En
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'readOnlyLongAttr' on a non-TestObj object."));
@@ -416,7 +416,7 @@ EncodedJSValue jsTestObjReadOnlyStringAttr(ExecState* exec, JSObject* slotBase,
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'readOnlyStringAttr' on a non-TestObj object."));
@@ -435,7 +435,7 @@ EncodedJSValue jsTestObjReadOnlyTestObjAttr(ExecState* exec, JSObject* slotBase,
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'readOnlyTestObjAttr' on a non-TestObj object."));
@@ -474,7 +474,7 @@ EncodedJSValue jsTestObjConstructorTestSubObj(ExecState* exec, JSObject* slotBas
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'TestSubObj' on a non-TestObj object."));
@@ -490,7 +490,7 @@ EncodedJSValue jsTestObjTestSubObjEnabledBySettingConstructor(ExecState* exec, J
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'TestSubObjEnabledBySetting' on a non-TestObj object."));
@@ -511,7 +511,7 @@ EncodedJSValue jsTestObjEnumAttr(ExecState* exec, JSObject* slotBase, EncodedJSV
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'enumAttr' on a non-TestObj object."));
@@ -530,7 +530,7 @@ EncodedJSValue jsTestObjByteAttr(ExecState* exec, JSObject* slotBase, EncodedJSV
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'byteAttr' on a non-TestObj object."));
@@ -549,7 +549,7 @@ EncodedJSValue jsTestObjOctetAttr(ExecState* exec, JSObject* slotBase, EncodedJS
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'octetAttr' on a non-TestObj object."));
@@ -568,7 +568,7 @@ EncodedJSValue jsTestObjShortAttr(ExecState* exec, JSObject* slotBase, EncodedJS
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'shortAttr' on a non-TestObj object."));
@@ -587,7 +587,7 @@ EncodedJSValue jsTestObjUnsignedShortAttr(ExecState* exec, JSObject* slotBase, E
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'unsignedShortAttr' on a non-TestObj object."));
@@ -606,7 +606,7 @@ EncodedJSValue jsTestObjLongAttr(ExecState* exec, JSObject* slotBase, EncodedJSV
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'longAttr' on a non-TestObj object."));
@@ -625,7 +625,7 @@ EncodedJSValue jsTestObjLongLongAttr(ExecState* exec, JSObject* slotBase, Encode
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'longLongAttr' on a non-TestObj object."));
@@ -644,7 +644,7 @@ EncodedJSValue jsTestObjUnsignedLongLongAttr(ExecState* exec, JSObject* slotBase
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'unsignedLongLongAttr' on a non-TestObj object."));
@@ -663,7 +663,7 @@ EncodedJSValue jsTestObjStringAttr(ExecState* exec, JSObject* slotBase, EncodedJ
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'stringAttr' on a non-TestObj object."));
@@ -682,7 +682,7 @@ EncodedJSValue jsTestObjTestObjAttr(ExecState* exec, JSObject* slotBase, Encoded
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'testObjAttr' on a non-TestObj object."));
@@ -701,7 +701,7 @@ EncodedJSValue jsTestObjXMLObjAttr(ExecState* exec, JSObject* slotBase, EncodedJ
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'XMLObjAttr' on a non-TestObj object."));
@@ -720,7 +720,7 @@ EncodedJSValue jsTestObjCreate(ExecState* exec, JSObject* slotBase, EncodedJSVal
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'create' on a non-TestObj object."));
@@ -739,7 +739,7 @@ EncodedJSValue jsTestObjReflectedStringAttr(ExecState* exec, JSObject* slotBase,
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'reflectedStringAttr' on a non-TestObj object."));
@@ -758,7 +758,7 @@ EncodedJSValue jsTestObjReflectedIntegralAttr(ExecState* exec, JSObject* slotBas
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'reflectedIntegralAttr' on a non-TestObj object."));
@@ -777,7 +777,7 @@ EncodedJSValue jsTestObjReflectedUnsignedIntegralAttr(ExecState* exec, JSObject*
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'reflectedUnsignedIntegralAttr' on a non-TestObj object."));
@@ -796,7 +796,7 @@ EncodedJSValue jsTestObjReflectedBooleanAttr(ExecState* exec, JSObject* slotBase
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'reflectedBooleanAttr' on a non-TestObj object."));
@@ -815,7 +815,7 @@ EncodedJSValue jsTestObjReflectedURLAttr(ExecState* exec, JSObject* slotBase, En
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'reflectedURLAttr' on a non-TestObj object."));
@@ -834,7 +834,7 @@ EncodedJSValue jsTestObjReflectedStringAttr(ExecState* exec, JSObject* slotBase,
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'reflectedStringAttr' on a non-TestObj object."));
@@ -853,7 +853,7 @@ EncodedJSValue jsTestObjReflectedCustomIntegralAttr(ExecState* exec, JSObject* s
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'reflectedCustomIntegralAttr' on a non-TestObj object."));
@@ -872,7 +872,7 @@ EncodedJSValue jsTestObjReflectedCustomBooleanAttr(ExecState* exec, JSObject* sl
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'reflectedCustomBooleanAttr' on a non-TestObj object."));
@@ -891,7 +891,7 @@ EncodedJSValue jsTestObjReflectedCustomURLAttr(ExecState* exec, JSObject* slotBa
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'reflectedCustomURLAttr' on a non-TestObj object."));
@@ -910,7 +910,7 @@ EncodedJSValue jsTestObjTypedArrayAttr(ExecState* exec, JSObject* slotBase, Enco
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'typedArrayAttr' on a non-TestObj object."));
@@ -929,7 +929,7 @@ EncodedJSValue jsTestObjAttrWithGetterException(ExecState* exec, JSObject* slotB
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'attrWithGetterException' on a non-TestObj object."));
@@ -949,7 +949,7 @@ EncodedJSValue jsTestObjAttrWithSetterException(ExecState* exec, JSObject* slotB
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'attrWithSetterException' on a non-TestObj object."));
@@ -968,7 +968,7 @@ EncodedJSValue jsTestObjStringAttrWithGetterException(ExecState* exec, JSObject*
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'stringAttrWithGetterException' on a non-TestObj object."));
@@ -988,7 +988,7 @@ EncodedJSValue jsTestObjStringAttrWithSetterException(ExecState* exec, JSObject*
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'stringAttrWithSetterException' on a non-TestObj object."));
@@ -1007,7 +1007,7 @@ EncodedJSValue jsTestObjCustomAttr(ExecState* exec, JSObject* slotBase, EncodedJ
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'customAttr' on a non-TestObj object."));
@@ -1023,7 +1023,7 @@ EncodedJSValue jsTestObjWithScriptStateAttribute(ExecState* exec, JSObject* slot
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'withScriptStateAttribute' on a non-TestObj object."));
@@ -1041,7 +1041,7 @@ EncodedJSValue jsTestObjWithScriptExecutionContextAttribute(ExecState* exec, JSO
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'withScriptExecutionContextAttribute' on a non-TestObj object."));
@@ -1062,7 +1062,7 @@ EncodedJSValue jsTestObjWithScriptStateAttributeRaises(ExecState* exec, JSObject
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'withScriptStateAttributeRaises' on a non-TestObj object."));
@@ -1082,7 +1082,7 @@ EncodedJSValue jsTestObjWithScriptExecutionContextAttributeRaises(ExecState* exe
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'withScriptExecutionContextAttributeRaises' on a non-TestObj object."));
@@ -1105,7 +1105,7 @@ EncodedJSValue jsTestObjWithScriptExecutionContextAndScriptStateAttribute(ExecSt
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'withScriptExecutionContextAndScriptStateAttribute' on a non-TestObj object."));
@@ -1126,7 +1126,7 @@ EncodedJSValue jsTestObjWithScriptExecutionContextAndScriptStateAttributeRaises(
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'withScriptExecutionContextAndScriptStateAttributeRaises' on a non-TestObj object."));
@@ -1149,7 +1149,7 @@ EncodedJSValue jsTestObjWithScriptExecutionContextAndScriptStateWithSpacesAttrib
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'withScriptExecutionContextAndScriptStateWithSpacesAttribute' on a non-TestObj object."));
@@ -1170,7 +1170,7 @@ EncodedJSValue jsTestObjWithScriptArgumentsAndCallStackAttribute(ExecState* exec
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'withScriptArgumentsAndCallStackAttribute' on a non-TestObj object."));
@@ -1189,7 +1189,7 @@ EncodedJSValue jsTestObjConditionalAttr1(ExecState* exec, JSObject* slotBase, En
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'conditionalAttr1' on a non-TestObj object."));
@@ -1210,7 +1210,7 @@ EncodedJSValue jsTestObjConditionalAttr2(ExecState* exec, JSObject* slotBase, En
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'conditionalAttr2' on a non-TestObj object."));
@@ -1231,7 +1231,7 @@ EncodedJSValue jsTestObjConditionalAttr3(ExecState* exec, JSObject* slotBase, En
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'conditionalAttr3' on a non-TestObj object."));
@@ -1252,7 +1252,7 @@ EncodedJSValue jsTestObjConditionalAttr4Constructor(ExecState* exec, JSObject* s
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'conditionalAttr4' on a non-TestObj object."));
@@ -1270,7 +1270,7 @@ EncodedJSValue jsTestObjConditionalAttr5Constructor(ExecState* exec, JSObject* s
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'conditionalAttr5' on a non-TestObj object."));
@@ -1288,7 +1288,7 @@ EncodedJSValue jsTestObjConditionalAttr6Constructor(ExecState* exec, JSObject* s
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'conditionalAttr6' on a non-TestObj object."));
@@ -1305,7 +1305,7 @@ EncodedJSValue jsTestObjCachedAttribute1(ExecState* exec, JSObject* slotBase, En
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'cachedAttribute1' on a non-TestObj object."));
@@ -1327,7 +1327,7 @@ EncodedJSValue jsTestObjCachedAttribute2(ExecState* exec, JSObject* slotBase, En
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'cachedAttribute2' on a non-TestObj object."));
@@ -1349,7 +1349,7 @@ EncodedJSValue jsTestObjAnyAttribute(ExecState* exec, JSObject* slotBase, Encode
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'anyAttribute' on a non-TestObj object."));
@@ -1368,7 +1368,7 @@ EncodedJSValue jsTestObjContentDocument(ExecState* exec, JSObject* slotBase, Enc
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'contentDocument' on a non-TestObj object."));
@@ -1385,7 +1385,7 @@ EncodedJSValue jsTestObjMutablePoint(ExecState* exec, JSObject* slotBase, Encode
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'mutablePoint' on a non-TestObj object."));
@@ -1404,7 +1404,7 @@ EncodedJSValue jsTestObjImmutablePoint(ExecState* exec, JSObject* slotBase, Enco
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'immutablePoint' on a non-TestObj object."));
@@ -1423,7 +1423,7 @@ EncodedJSValue jsTestObjStrawberry(ExecState* exec, JSObject* slotBase, EncodedJ
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'strawberry' on a non-TestObj object."));
@@ -1442,7 +1442,7 @@ EncodedJSValue jsTestObjStrictFloat(ExecState* exec, JSObject* slotBase, Encoded
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'strictFloat' on a non-TestObj object."));
@@ -1461,7 +1461,7 @@ EncodedJSValue jsTestObjDescription(ExecState* exec, JSObject* slotBase, Encoded
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'description' on a non-TestObj object."));
@@ -1480,7 +1480,7 @@ EncodedJSValue jsTestObjId(ExecState* exec, JSObject* slotBase, EncodedJSValue t
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'id' on a non-TestObj object."));
@@ -1499,7 +1499,7 @@ EncodedJSValue jsTestObjHash(ExecState* exec, JSObject* slotBase, EncodedJSValue
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'hash' on a non-TestObj object."));
@@ -1518,7 +1518,7 @@ EncodedJSValue jsTestObjReplaceableAttribute(ExecState* exec, JSObject* slotBase
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'replaceableAttribute' on a non-TestObj object."));
@@ -1537,7 +1537,7 @@ EncodedJSValue jsTestObjNullableDoubleAttribute(ExecState* exec, JSObject* slotB
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'nullableDoubleAttribute' on a non-TestObj object."));
@@ -1559,7 +1559,7 @@ EncodedJSValue jsTestObjNullableLongAttribute(ExecState* exec, JSObject* slotBas
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'nullableLongAttribute' on a non-TestObj object."));
@@ -1581,7 +1581,7 @@ EncodedJSValue jsTestObjNullableBooleanAttribute(ExecState* exec, JSObject* slot
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'nullableBooleanAttribute' on a non-TestObj object."));
@@ -1603,7 +1603,7 @@ EncodedJSValue jsTestObjNullableStringAttribute(ExecState* exec, JSObject* slotB
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'nullableStringAttribute' on a non-TestObj object."));
@@ -1625,7 +1625,7 @@ EncodedJSValue jsTestObjNullableLongSettableAttribute(ExecState* exec, JSObject*
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'nullableLongSettableAttribute' on a non-TestObj object."));
@@ -1647,7 +1647,7 @@ EncodedJSValue jsTestObjNullableStringValue(ExecState* exec, JSObject* slotBase,
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'nullableStringValue' on a non-TestObj object."));
@@ -1670,7 +1670,7 @@ EncodedJSValue jsTestObjAttribute(ExecState* exec, JSObject* slotBase, EncodedJS
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'attribute' on a non-TestObj object."));
@@ -1689,7 +1689,7 @@ EncodedJSValue jsTestObjAttributeWithReservedEnumType(ExecState* exec, JSObject*
 {
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestObjPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'attributeWithReservedEnumType' on a non-TestObj object."));
@@ -1719,7 +1719,7 @@ void setJSTestObjConstructorStaticStringAttr(ExecState* exec, JSObject* /* baseO
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     const String& nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     TestObj::setStaticStringAttr(nativeValue);
 }
@@ -1730,7 +1730,7 @@ void setJSTestObjTestSubObjEnabledBySettingConstructor(ExecState* exec, JSObject
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
@@ -1744,13 +1744,13 @@ void setJSTestObjEnumAttr(ExecState* exec, JSObject* /* baseObject */, EncodedJS
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     const String nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     if (nativeValue != "" && nativeValue != "EnumValue1" && nativeValue != "EnumValue2" && nativeValue != "EnumValue3")
         return;
@@ -1763,13 +1763,13 @@ void setJSTestObjByteAttr(ExecState* exec, JSObject* /* baseObject */, EncodedJS
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int8_t nativeValue(toInt8(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setByteAttr(nativeValue);
 }
@@ -1780,13 +1780,13 @@ void setJSTestObjOctetAttr(ExecState* exec, JSObject* /* baseObject */, EncodedJ
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     uint8_t nativeValue(toUInt8(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setOctetAttr(nativeValue);
 }
@@ -1797,13 +1797,13 @@ void setJSTestObjShortAttr(ExecState* exec, JSObject* /* baseObject */, EncodedJ
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int16_t nativeValue(toInt16(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setShortAttr(nativeValue);
 }
@@ -1814,13 +1814,13 @@ void setJSTestObjUnsignedShortAttr(ExecState* exec, JSObject* /* baseObject */,
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     uint16_t nativeValue(toUInt16(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setUnsignedShortAttr(nativeValue);
 }
@@ -1831,13 +1831,13 @@ void setJSTestObjLongAttr(ExecState* exec, JSObject* /* baseObject */, EncodedJS
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setLongAttr(nativeValue);
 }
@@ -1848,13 +1848,13 @@ void setJSTestObjLongLongAttr(ExecState* exec, JSObject* /* baseObject */, Encod
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     long long nativeValue(toInt64(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setLongLongAttr(nativeValue);
 }
@@ -1865,13 +1865,13 @@ void setJSTestObjUnsignedLongLongAttr(ExecState* exec, JSObject* /* baseObject *
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     unsigned long long nativeValue(toUInt64(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setUnsignedLongLongAttr(nativeValue);
 }
@@ -1882,13 +1882,13 @@ void setJSTestObjStringAttr(ExecState* exec, JSObject* /* baseObject */, Encoded
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     const String& nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setStringAttr(nativeValue);
 }
@@ -1899,13 +1899,13 @@ void setJSTestObjTestObjAttr(ExecState* exec, JSObject* /* baseObject */, Encode
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     TestObj* nativeValue(toTestObj(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setTestObjAttr(nativeValue);
 }
@@ -1916,13 +1916,13 @@ void setJSTestObjXMLObjAttr(ExecState* exec, JSObject* /* baseObject */, Encoded
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     TestObj* nativeValue(toTestObj(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setXMLObjAttr(nativeValue);
 }
@@ -1933,13 +1933,13 @@ void setJSTestObjCreate(ExecState* exec, JSObject* /* baseObject */, EncodedJSVa
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     bool nativeValue(value.toBoolean(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setCreate(nativeValue);
 }
@@ -1950,13 +1950,13 @@ void setJSTestObjReflectedStringAttr(ExecState* exec, JSObject* /* baseObject */
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     const String& nativeValue(valueToStringWithNullCheck(exec, value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setAttributeWithoutSynchronization(WebCore::HTMLNames::reflectedstringattrAttr, nativeValue);
 }
@@ -1967,13 +1967,13 @@ void setJSTestObjReflectedIntegralAttr(ExecState* exec, JSObject* /* baseObject
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setIntegralAttribute(WebCore::HTMLNames::reflectedintegralattrAttr, nativeValue);
 }
@@ -1984,13 +1984,13 @@ void setJSTestObjReflectedUnsignedIntegralAttr(ExecState* exec, JSObject* /* bas
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     unsigned nativeValue(toUInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setUnsignedIntegralAttribute(WebCore::HTMLNames::reflectedunsignedintegralattrAttr, nativeValue);
 }
@@ -2001,13 +2001,13 @@ void setJSTestObjReflectedBooleanAttr(ExecState* exec, JSObject* /* baseObject *
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     bool nativeValue(value.toBoolean(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setBooleanAttribute(WebCore::HTMLNames::reflectedbooleanattrAttr, nativeValue);
 }
@@ -2018,13 +2018,13 @@ void setJSTestObjReflectedURLAttr(ExecState* exec, JSObject* /* baseObject */, E
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     const String& nativeValue(valueToStringWithNullCheck(exec, value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setAttributeWithoutSynchronization(WebCore::HTMLNames::reflectedurlattrAttr, nativeValue);
 }
@@ -2035,13 +2035,13 @@ void setJSTestObjReflectedStringAttr(ExecState* exec, JSObject* /* baseObject */
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     const String& nativeValue(valueToStringWithNullCheck(exec, value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setAttributeWithoutSynchronization(WebCore::HTMLNames::customContentStringAttrAttr, nativeValue);
 }
@@ -2052,13 +2052,13 @@ void setJSTestObjReflectedCustomIntegralAttr(ExecState* exec, JSObject* /* baseO
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setIntegralAttribute(WebCore::HTMLNames::customContentIntegralAttrAttr, nativeValue);
 }
@@ -2069,13 +2069,13 @@ void setJSTestObjReflectedCustomBooleanAttr(ExecState* exec, JSObject* /* baseOb
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     bool nativeValue(value.toBoolean(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setBooleanAttribute(WebCore::HTMLNames::customContentBooleanAttrAttr, nativeValue);
 }
@@ -2086,13 +2086,13 @@ void setJSTestObjReflectedCustomURLAttr(ExecState* exec, JSObject* /* baseObject
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     const String& nativeValue(valueToStringWithNullCheck(exec, value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setAttributeWithoutSynchronization(WebCore::HTMLNames::customContentURLAttrAttr, nativeValue);
 }
@@ -2103,13 +2103,13 @@ void setJSTestObjTypedArrayAttr(ExecState* exec, JSObject* /* baseObject */, Enc
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     RefPtr<Float32Array> nativeValue(toFloat32Array(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setTypedArrayAttr(nativeValue.get());
 }
@@ -2120,13 +2120,13 @@ void setJSTestObjAttrWithGetterException(ExecState* exec, JSObject* /* baseObjec
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setAttrWithGetterException(nativeValue);
 }
@@ -2137,14 +2137,14 @@ void setJSTestObjAttrWithSetterException(ExecState* exec, JSObject* /* baseObjec
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     ExceptionCode ec = 0;
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setAttrWithSetterException(nativeValue, ec);
     setDOMException(exec, ec);
@@ -2156,13 +2156,13 @@ void setJSTestObjStringAttrWithGetterException(ExecState* exec, JSObject* /* bas
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     const String& nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setStringAttrWithGetterException(nativeValue);
 }
@@ -2173,14 +2173,14 @@ void setJSTestObjStringAttrWithSetterException(ExecState* exec, JSObject* /* bas
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     ExceptionCode ec = 0;
     const String& nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setStringAttrWithSetterException(nativeValue, ec);
     setDOMException(exec, ec);
@@ -2192,7 +2192,7 @@ void setJSTestObjCustomAttr(ExecState* exec, JSObject* /* baseObject */, Encoded
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
@@ -2205,13 +2205,13 @@ void setJSTestObjWithScriptStateAttribute(ExecState* exec, JSObject* /* baseObje
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setWithScriptStateAttribute(exec, nativeValue);
 }
@@ -2222,13 +2222,13 @@ void setJSTestObjWithScriptExecutionContextAttribute(ExecState* exec, JSObject*
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     TestObj* nativeValue(toTestObj(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     ScriptExecutionContext* scriptContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
     if (!scriptContext)
@@ -2242,13 +2242,13 @@ void setJSTestObjWithScriptStateAttributeRaises(ExecState* exec, JSObject* /* ba
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     TestObj* nativeValue(toTestObj(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setWithScriptStateAttributeRaises(exec, nativeValue);
 }
@@ -2259,13 +2259,13 @@ void setJSTestObjWithScriptExecutionContextAttributeRaises(ExecState* exec, JSOb
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     TestObj* nativeValue(toTestObj(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     ScriptExecutionContext* scriptContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
     if (!scriptContext)
@@ -2279,13 +2279,13 @@ void setJSTestObjWithScriptExecutionContextAndScriptStateAttribute(ExecState* ex
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     TestObj* nativeValue(toTestObj(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     ScriptExecutionContext* scriptContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
     if (!scriptContext)
@@ -2299,13 +2299,13 @@ void setJSTestObjWithScriptExecutionContextAndScriptStateAttributeRaises(ExecSta
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     TestObj* nativeValue(toTestObj(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     ScriptExecutionContext* scriptContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
     if (!scriptContext)
@@ -2319,13 +2319,13 @@ void setJSTestObjWithScriptExecutionContextAndScriptStateWithSpacesAttribute(Exe
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     TestObj* nativeValue(toTestObj(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     ScriptExecutionContext* scriptContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
     if (!scriptContext)
@@ -2339,13 +2339,13 @@ void setJSTestObjWithScriptArgumentsAndCallStackAttribute(ExecState* exec, JSObj
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     TestObj* nativeValue(toTestObj(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setWithScriptArgumentsAndCallStackAttribute(nativeValue);
 }
@@ -2357,13 +2357,13 @@ void setJSTestObjConditionalAttr1(ExecState* exec, JSObject* /* baseObject */, E
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setConditionalAttr1(nativeValue);
 }
@@ -2376,13 +2376,13 @@ void setJSTestObjConditionalAttr2(ExecState* exec, JSObject* /* baseObject */, E
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setConditionalAttr2(nativeValue);
 }
@@ -2395,13 +2395,13 @@ void setJSTestObjConditionalAttr3(ExecState* exec, JSObject* /* baseObject */, E
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setConditionalAttr3(nativeValue);
 }
@@ -2414,7 +2414,7 @@ void setJSTestObjConditionalAttr4Constructor(ExecState* exec, JSObject* /* baseO
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
@@ -2430,7 +2430,7 @@ void setJSTestObjConditionalAttr5Constructor(ExecState* exec, JSObject* /* baseO
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
@@ -2446,7 +2446,7 @@ void setJSTestObjConditionalAttr6Constructor(ExecState* exec, JSObject* /* baseO
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
@@ -2461,13 +2461,13 @@ void setJSTestObjAnyAttribute(ExecState* exec, JSObject* /* baseObject */, Encod
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     Deprecated::ScriptValue nativeValue(exec->vm(), value);
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setAnyAttribute(nativeValue);
 }
@@ -2478,13 +2478,13 @@ void setJSTestObjMutablePoint(ExecState* exec, JSObject* /* baseObject */, Encod
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     SVGPropertyTearOff<SVGPoint>* nativeValue(toSVGPoint(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setMutablePoint(nativeValue);
 }
@@ -2495,13 +2495,13 @@ void setJSTestObjImmutablePoint(ExecState* exec, JSObject* /* baseObject */, Enc
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     SVGPropertyTearOff<SVGPoint>* nativeValue(toSVGPoint(value));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setImmutablePoint(nativeValue);
 }
@@ -2512,13 +2512,13 @@ void setJSTestObjStrawberry(ExecState* exec, JSObject* /* baseObject */, Encoded
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setBlueberry(nativeValue);
 }
@@ -2529,13 +2529,13 @@ void setJSTestObjStrictFloat(ExecState* exec, JSObject* /* baseObject */, Encode
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     float nativeValue(value.toFloat(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setStrictFloat(nativeValue);
 }
@@ -2546,13 +2546,13 @@ void setJSTestObjId(ExecState* exec, JSObject* /* baseObject */, EncodedJSValue
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setId(nativeValue);
 }
@@ -2563,7 +2563,7 @@ void setJSTestObjReplaceableAttribute(ExecState* exec, JSObject* /* baseObject *
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
@@ -2577,13 +2577,13 @@ void setJSTestObjNullableLongSettableAttribute(ExecState* exec, JSObject* /* bas
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setNullableLongSettableAttribute(nativeValue);
 }
@@ -2594,13 +2594,13 @@ void setJSTestObjNullableStringValue(ExecState* exec, JSObject* /* baseObject */
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setNullableStringValue(nativeValue);
 }
@@ -2611,13 +2611,13 @@ void setJSTestObjAttributeWithReservedEnumType(ExecState* exec, JSObject* /* bas
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestObj& impl = castedThis->impl();
     const String nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     if (nativeValue != "" && nativeValue != "OptionalValue1" && nativeValue != "OptionalValue2" && nativeValue != "OptionalValue3")
         return;
@@ -2634,7 +2634,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionVoidMethod(ExecState* exe
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -2646,20 +2646,20 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionVoidMethodWithArgs(ExecSt
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 3)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     int longArg(toInt32(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     const String& strArg(exec->argument(1).isEmpty() ? String() : exec->argument(1).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     TestObj* objArg(toTestObj(exec->argument(2)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.voidMethodWithArgs(longArg, strArg, objArg);
     return JSValue::encode(jsUndefined());
@@ -2669,7 +2669,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionByteMethod(ExecState* exe
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -2682,20 +2682,20 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionByteMethodWithArgs(ExecSt
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 3)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     int8_t byteArg(toInt8(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     const String& strArg(exec->argument(1).isEmpty() ? String() : exec->argument(1).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     TestObj* objArg(toTestObj(exec->argument(2)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = jsNumber(impl.byteMethodWithArgs(byteArg, strArg, objArg));
@@ -2706,7 +2706,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOctetMethod(ExecState* ex
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -2719,20 +2719,20 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOctetMethodWithArgs(ExecS
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 3)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     uint8_t octetArg(toUInt8(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     const String& strArg(exec->argument(1).isEmpty() ? String() : exec->argument(1).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     TestObj* objArg(toTestObj(exec->argument(2)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = jsNumber(impl.octetMethodWithArgs(octetArg, strArg, objArg));
@@ -2743,7 +2743,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionLongMethod(ExecState* exe
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -2756,20 +2756,20 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionLongMethodWithArgs(ExecSt
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 3)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     int longArg(toInt32(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     const String& strArg(exec->argument(1).isEmpty() ? String() : exec->argument(1).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     TestObj* objArg(toTestObj(exec->argument(2)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = jsNumber(impl.longMethodWithArgs(longArg, strArg, objArg));
@@ -2780,7 +2780,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionObjMethod(ExecState* exec
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -2793,20 +2793,20 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionObjMethodWithArgs(ExecSta
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 3)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     int longArg(toInt32(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     const String& strArg(exec->argument(1).isEmpty() ? String() : exec->argument(1).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     TestObj* objArg(toTestObj(exec->argument(2)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.objMethodWithArgs(longArg, strArg, objArg)));
@@ -2817,14 +2817,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithSequenceArg(Exe
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Vector<RefPtr<ScriptProfile> > sequenceArg((toRefPtrNativeArray<ScriptProfile, JSScriptProfile>(exec, exec->argument(0), &toScriptProfile)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.methodWithSequenceArg(sequenceArg);
     return JSValue::encode(jsUndefined());
@@ -2834,14 +2834,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodReturningSequence(E
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     int longArg(toInt32(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = jsArray(exec, castedThis->globalObject(), impl.methodReturningSequence(longArg));
@@ -2852,14 +2852,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithEnumArg(ExecSta
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     const String enumArg(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     if (enumArg != "" && enumArg != "EnumValue1" && enumArg != "EnumValue2" && enumArg != "EnumValue3")
         return throwVMTypeError(exec);
@@ -2871,7 +2871,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodThatRequiresAllArgs
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -2879,10 +2879,10 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodThatRequiresAllArgs
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     ExceptionCode ec = 0;
     const String& strArg(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     TestObj* objArg(toTestObj(exec->argument(1)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.methodThatRequiresAllArgsAndThrows(strArg, objArg, ec)));
@@ -2894,14 +2894,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionSerializedValue(ExecState
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     RefPtr<SerializedScriptValue> serializedArg(SerializedScriptValue::create(exec, exec->argument(0), 0, 0));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.serializedValue(serializedArg);
     return JSValue::encode(jsUndefined());
@@ -2911,17 +2911,17 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOptionsObject(ExecState*
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Dictionary oo(exec, exec->argument(0));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     Dictionary ooo(exec, exec->argument(1));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.optionsObject(oo, ooo);
     return JSValue::encode(jsUndefined());
@@ -2931,7 +2931,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithException(ExecS
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -2945,7 +2945,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionCustomMethod(ExecState* e
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     return JSValue::encode(castedThis->customMethod(exec));
@@ -2955,7 +2955,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionCustomMethodWithArgs(Exec
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     return JSValue::encode(castedThis->customMethodWithArgs(exec));
@@ -2965,7 +2965,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionAddEventListener(ExecStat
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -2980,7 +2980,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionRemoveEventListener(ExecS
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -2995,7 +2995,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptStateVoid(ExecS
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3007,13 +3007,13 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptStateObj(ExecSt
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.withScriptStateObj(exec)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     return JSValue::encode(result);
 }
@@ -3022,7 +3022,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptStateVoidExcept
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3036,7 +3036,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptStateObjExcepti
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3044,7 +3044,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptStateObjExcepti
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.withScriptStateObjException(exec, ec)));
     setDOMException(exec, ec);
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     return JSValue::encode(result);
 }
@@ -3053,7 +3053,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptExecutionContex
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3068,7 +3068,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptExecutionContex
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3083,7 +3083,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptExecutionContex
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3094,7 +3094,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptExecutionContex
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.withScriptExecutionContextAndScriptStateObjException(exec, scriptContext, ec)));
     setDOMException(exec, ec);
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     return JSValue::encode(result);
 }
@@ -3103,7 +3103,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptExecutionContex
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3112,7 +3112,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptExecutionContex
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.withScriptExecutionContextAndScriptStateWithSpaces(exec, scriptContext)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     return JSValue::encode(result);
 }
@@ -3121,7 +3121,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionWithScriptArgumentsAndCal
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3134,7 +3134,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithOptionalArg(Exe
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3146,7 +3146,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithOptionalArg(Exe
     }
 
     int opt(toInt32(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.methodWithOptionalArg(opt);
     return JSValue::encode(jsUndefined());
@@ -3156,14 +3156,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithNonOptionalArgA
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     int nonOpt(toInt32(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     size_t argsCount = exec->argumentCount();
@@ -3173,7 +3173,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithNonOptionalArgA
     }
 
     int opt(toInt32(exec, exec->argument(1), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.methodWithNonOptionalArgAndOptionalArg(nonOpt, opt);
     return JSValue::encode(jsUndefined());
@@ -3183,14 +3183,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithNonOptionalArgA
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     int nonOpt(toInt32(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     size_t argsCount = exec->argumentCount();
@@ -3200,7 +3200,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithNonOptionalArgA
     }
 
     int opt1(toInt32(exec, exec->argument(1), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     if (argsCount <= 2) {
         impl.methodWithNonOptionalArgAndTwoOptionalArgs(nonOpt, opt1);
@@ -3208,7 +3208,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithNonOptionalArgA
     }
 
     int opt2(toInt32(exec, exec->argument(2), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.methodWithNonOptionalArgAndTwoOptionalArgs(nonOpt, opt1, opt2);
     return JSValue::encode(jsUndefined());
@@ -3218,7 +3218,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithOptionalString(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3230,7 +3230,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithOptionalString(
     }
 
     const String& str(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.methodWithOptionalString(str);
     return JSValue::encode(jsUndefined());
@@ -3240,12 +3240,12 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithOptionalStringI
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     const String& str(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.methodWithOptionalStringIsUndefined(str);
     return JSValue::encode(jsUndefined());
@@ -3255,12 +3255,12 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithOptionalStringI
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     const String& str(argumentOrNull(exec, 0).isEmpty() ? String() : argumentOrNull(exec, 0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.methodWithOptionalStringIsNullString(str);
     return JSValue::encode(jsUndefined());
@@ -3270,7 +3270,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithCallbackArg(Exe
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3287,14 +3287,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithNonCallbackArgA
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 2)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     int nonCallback(toInt32(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     if (!exec->argument(1).isFunction())
         return throwVMTypeError(exec);
@@ -3307,7 +3307,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithCallbackAndOpti
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3349,7 +3349,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionConditionalMethod1(ExecSt
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3365,7 +3365,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionConditionalMethod2(ExecSt
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3380,7 +3380,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionConditionalMethod3(ExecSt
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3394,17 +3394,17 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod1(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 2)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     TestObj* objArg(toTestObj(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     const String& strArg(exec->argument(1).isEmpty() ? String() : exec->argument(1).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.overloadedMethod(objArg, strArg);
     return JSValue::encode(jsUndefined());
@@ -3414,14 +3414,14 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod2(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     TestObj* objArg(toTestObj(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     size_t argsCount = exec->argumentCount();
@@ -3431,7 +3431,7 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod2(
     }
 
     int longArg(toInt32(exec, exec->argument(1), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.overloadedMethod(objArg, longArg);
     return JSValue::encode(jsUndefined());
@@ -3441,14 +3441,14 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod3(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     const String& strArg(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.overloadedMethod(strArg);
     return JSValue::encode(jsUndefined());
@@ -3458,14 +3458,14 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod4(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     int longArg(toInt32(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.overloadedMethod(longArg);
     return JSValue::encode(jsUndefined());
@@ -3475,7 +3475,7 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod5(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3492,14 +3492,14 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod6(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     RefPtr<DOMStringList> listArg(toDOMStringList(exec, exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.overloadedMethod(listArg);
     return JSValue::encode(jsUndefined());
@@ -3509,14 +3509,14 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod7(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Vector<String> arrayArg(toNativeArray<String>(exec, exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.overloadedMethod(arrayArg);
     return JSValue::encode(jsUndefined());
@@ -3526,14 +3526,14 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod8(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     TestObj* objArg(toTestObj(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.overloadedMethod(objArg);
     return JSValue::encode(jsUndefined());
@@ -3543,14 +3543,14 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod9(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Vector<String> arrayArg(toNativeArray<String>(exec, exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.overloadedMethod(arrayArg);
     return JSValue::encode(jsUndefined());
@@ -3560,14 +3560,14 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod10
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Vector<unsigned> arrayArg(toNativeArray<unsigned>(exec, exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.overloadedMethod(arrayArg);
     return JSValue::encode(jsUndefined());
@@ -3577,14 +3577,14 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOverloadedMethod11
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     const String& strArg(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.overloadedMethod(strArg);
     return JSValue::encode(jsUndefined());
@@ -3639,7 +3639,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjConstructorFunctionClassMethodWithOptional
     }
 
     int arg(toInt32(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = jsNumber(TestObj::classMethodWithOptional(arg));
@@ -3659,7 +3659,7 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjConstructorFunctionOverloadedMethod
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     int arg(toInt32(exec, exec->argument(0), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     TestObj::overloadedMethod1(arg);
     return JSValue::encode(jsUndefined());
@@ -3673,7 +3673,7 @@ static EncodedJSValue JSC_HOST_CALL jsTestObjConstructorFunctionOverloadedMethod
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     const String& type(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     TestObj::overloadedMethod1(type);
     return JSValue::encode(jsUndefined());
@@ -3704,7 +3704,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionClassMethodWithClamp(Exec
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3712,7 +3712,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionClassMethodWithClamp(Exec
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     unsigned short objArgsShort = 0;
     double objArgsShortNativeValue = exec->argument(0).toNumber(exec);
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     if (!std::isnan(objArgsShortNativeValue))
@@ -3720,7 +3720,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionClassMethodWithClamp(Exec
 
     unsigned long objArgsLong = 0;
     double objArgsLongNativeValue = exec->argument(1).toNumber(exec);
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     if (!std::isnan(objArgsLongNativeValue))
@@ -3734,14 +3734,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMethodWithUnsignedLongSeq
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Vector<unsigned> unsignedLongSequence(toNativeArray<unsigned>(exec, exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.methodWithUnsignedLongSequence(unsignedLongSequence);
     return JSValue::encode(jsUndefined());
@@ -3751,7 +3751,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionStringArrayFunction(ExecS
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3759,7 +3759,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionStringArrayFunction(ExecS
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     ExceptionCode ec = 0;
     Vector<String> values(toNativeArray<String>(exec, exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = jsArray(exec, castedThis->globalObject(), impl.stringArrayFunction(values, ec));
@@ -3771,7 +3771,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionDomStringListFunction(Exe
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3779,7 +3779,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionDomStringListFunction(Exe
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     ExceptionCode ec = 0;
     RefPtr<DOMStringList> values(toDOMStringList(exec, exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.domStringListFunction(values, ec)));
@@ -3791,7 +3791,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionGetSVGDocument(ExecState*
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3808,14 +3808,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionConvert1(ExecState* exec)
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     TestNode* value(toTestNode(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.convert1(value);
     return JSValue::encode(jsUndefined());
@@ -3825,14 +3825,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionConvert2(ExecState* exec)
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     TestNode* value(toTestNode(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.convert2(value);
     return JSValue::encode(jsUndefined());
@@ -3842,14 +3842,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionConvert4(ExecState* exec)
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     TestNode* value(toTestNode(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.convert4(value);
     return JSValue::encode(jsUndefined());
@@ -3859,14 +3859,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionConvert5(ExecState* exec)
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     TestNode* value(toTestNode(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.convert5(value);
     return JSValue::encode(jsUndefined());
@@ -3876,7 +3876,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionMutablePointFunction(Exec
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3889,7 +3889,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionImmutablePointFunction(Ex
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3902,7 +3902,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionOrange(ExecState* exec)
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3914,7 +3914,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionStrictFunction(ExecState*
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3922,13 +3922,13 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionStrictFunction(ExecState*
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     ExceptionCode ec = 0;
     const String& str(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     float a(exec->argument(1).toFloat(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     int b(toInt32(exec, exec->argument(2), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.strictFunction(str, a, b, ec)));
@@ -3940,7 +3940,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionStrictFunctionWithSequenc
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3950,10 +3950,10 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionStrictFunctionWithSequenc
     if (exec->argumentCount() > 0 && !exec->argument(0).isUndefinedOrNull() && !exec->argument(0).inherits(JSTestObj::info()))
         return throwVMTypeError(exec);
     TestObj* objArg(toTestObj(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     Vector<unsigned> a(toNativeArray<unsigned>(exec, exec->argument(1)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.strictFunctionWithSequence(objArg, a, ec)));
@@ -3965,7 +3965,7 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionStrictFunctionWithArray(E
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
@@ -3975,10 +3975,10 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionStrictFunctionWithArray(E
     if (exec->argumentCount() > 0 && !exec->argument(0).isUndefinedOrNull() && !exec->argument(0).inherits(JSTestObj::info()))
         return throwVMTypeError(exec);
     TestObj* objArg(toTestObj(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     Vector<int> array(toNativeArray<int>(exec, exec->argument(1)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(impl.strictFunctionWithArray(objArg, array, ec)));
@@ -3990,17 +3990,17 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionVariadicStringMethod(Exec
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     const String& head(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     Vector<String> tail = toNativeArguments<String>(exec, 1);
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.variadicStringMethod(head, tail);
     return JSValue::encode(jsUndefined());
@@ -4010,17 +4010,17 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionVariadicDoubleMethod(Exec
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     double head(exec->argument(0).toNumber(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     Vector<double> tail = toNativeArguments<double>(exec, 1);
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.variadicDoubleMethod(head, tail);
     return JSValue::encode(jsUndefined());
@@ -4030,14 +4030,14 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionVariadicNodeMethod(ExecSt
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Node* head(toNode(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     Vector<Node*> tail;
     for (unsigned i = 1, count = exec->argumentCount(); i < count; ++i) {
@@ -4053,17 +4053,17 @@ EncodedJSValue JSC_HOST_CALL jsTestObjPrototypeFunctionAny(ExecState* exec)
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestObj* castedThis = jsDynamicCast<JSTestObj*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestObj::info());
     TestObj& impl = castedThis->impl();
     if (exec->argumentCount() < 2)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     float a(exec->argument(0).toFloat(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     int b(toInt32(exec, exec->argument(1), NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.any(a, b);
     return JSValue::encode(jsUndefined());

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructors.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructors.cpp
index 0c0e9fd49a26b29f647de18ffde015143669581f..3a1ae7c23319063681e83e5a6d7d08a2649d36c3 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructors.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestOverloadedConstructors.cpp
@@ -46,7 +46,7 @@ EncodedJSValue JSC_HOST_CALL JSTestOverloadedConstructorsConstructor::constructJ
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     ArrayBuffer* arrayBuffer(toArrayBuffer(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     RefPtr<TestOverloadedConstructors> object = TestOverloadedConstructors::create(arrayBuffer);
     return JSValue::encode(asObject(toJS(exec, castedThis->globalObject(), object.get())));
@@ -58,7 +58,7 @@ EncodedJSValue JSC_HOST_CALL JSTestOverloadedConstructorsConstructor::constructJ
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     RefPtr<ArrayBufferView> arrayBufferView(toArrayBufferView(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     RefPtr<TestOverloadedConstructors> object = TestOverloadedConstructors::create(arrayBufferView);
     return JSValue::encode(asObject(toJS(exec, castedThis->globalObject(), object.get())));
@@ -70,7 +70,7 @@ EncodedJSValue JSC_HOST_CALL JSTestOverloadedConstructorsConstructor::constructJ
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Blob* blob(toBlob(exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     RefPtr<TestOverloadedConstructors> object = TestOverloadedConstructors::create(blob);
     return JSValue::encode(asObject(toJS(exec, castedThis->globalObject(), object.get())));
@@ -82,7 +82,7 @@ EncodedJSValue JSC_HOST_CALL JSTestOverloadedConstructorsConstructor::constructJ
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     const String& string(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     RefPtr<TestOverloadedConstructors> object = TestOverloadedConstructors::create(string);
     return JSValue::encode(asObject(toJS(exec, castedThis->globalObject(), object.get())));

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestSerializedScriptValueInterface.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestSerializedScriptValueInterface.cpp
index 434a9838beb5a283a119b651889116156d0cb117..d2f88b86b27ce164b1a65b5ab4dde15bf7953572 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestSerializedScriptValueInterface.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestSerializedScriptValueInterface.cpp
@@ -132,7 +132,7 @@ EncodedJSValue jsTestSerializedScriptValueInterfaceValue(ExecState* exec, JSObje
 {
     JSTestSerializedScriptValueInterface* castedThis = jsDynamicCast<JSTestSerializedScriptValueInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestSerializedScriptValueInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'value' on a non-TestSerializedScriptValueInterface object."));
@@ -151,7 +151,7 @@ EncodedJSValue jsTestSerializedScriptValueInterfaceReadonlyValue(ExecState* exec
 {
     JSTestSerializedScriptValueInterface* castedThis = jsDynamicCast<JSTestSerializedScriptValueInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestSerializedScriptValueInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'readonlyValue' on a non-TestSerializedScriptValueInterface object."));
@@ -170,7 +170,7 @@ EncodedJSValue jsTestSerializedScriptValueInterfaceCachedValue(ExecState* exec,
 {
     JSTestSerializedScriptValueInterface* castedThis = jsDynamicCast<JSTestSerializedScriptValueInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestSerializedScriptValueInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'cachedValue' on a non-TestSerializedScriptValueInterface object."));
@@ -192,7 +192,7 @@ EncodedJSValue jsTestSerializedScriptValueInterfacePorts(ExecState* exec, JSObje
 {
     JSTestSerializedScriptValueInterface* castedThis = jsDynamicCast<JSTestSerializedScriptValueInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestSerializedScriptValueInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'ports' on a non-TestSerializedScriptValueInterface object."));
@@ -211,7 +211,7 @@ EncodedJSValue jsTestSerializedScriptValueInterfaceCachedReadonlyValue(ExecState
 {
     JSTestSerializedScriptValueInterface* castedThis = jsDynamicCast<JSTestSerializedScriptValueInterface*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestSerializedScriptValueInterfacePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'cachedReadonlyValue' on a non-TestSerializedScriptValueInterface object."));
@@ -244,13 +244,13 @@ void setJSTestSerializedScriptValueInterfaceValue(ExecState* exec, JSObject* /*
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestSerializedScriptValueInterface* castedThis = jsDynamicCast<JSTestSerializedScriptValueInterface*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestSerializedScriptValueInterface& impl = castedThis->impl();
     RefPtr<SerializedScriptValue> nativeValue(SerializedScriptValue::create(exec, value, 0, 0));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setValue(nativeValue);
 }
@@ -261,13 +261,13 @@ void setJSTestSerializedScriptValueInterfaceCachedValue(ExecState* exec, JSObjec
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestSerializedScriptValueInterface* castedThis = jsDynamicCast<JSTestSerializedScriptValueInterface*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestSerializedScriptValueInterface& impl = castedThis->impl();
     RefPtr<SerializedScriptValue> nativeValue(SerializedScriptValue::create(exec, value, 0, 0));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setCachedValue(nativeValue);
 }

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestTypedefs.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestTypedefs.cpp
index 204acaabd0c9350cafb626f1cd323848f40c336d..1ab3960c18cc9212fb564ba32d3af47b3621b137 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSTestTypedefs.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestTypedefs.cpp
@@ -67,7 +67,7 @@ EncodedJSValue JSC_HOST_CALL JSTestTypedefsConstructor::constructJSTestTypedefs(
     if (exec->argumentCount() < 2)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     const String& hello(exec->argument(0).isEmpty() ? String() : exec->argument(0).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     if (!exec->argument(1).isFunction())
         return throwVMTypeError(exec);
@@ -181,7 +181,7 @@ EncodedJSValue jsTestTypedefsUnsignedLongLongAttr(ExecState* exec, JSObject* slo
 {
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestTypedefsPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'unsignedLongLongAttr' on a non-TestTypedefs object."));
@@ -200,7 +200,7 @@ EncodedJSValue jsTestTypedefsImmutableSerializedScriptValue(ExecState* exec, JSO
 {
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestTypedefsPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'immutableSerializedScriptValue' on a non-TestTypedefs object."));
@@ -219,7 +219,7 @@ EncodedJSValue jsTestTypedefsConstructorTestSubObj(ExecState* exec, JSObject* sl
 {
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestTypedefsPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'TestSubObj' on a non-TestTypedefs object."));
@@ -235,7 +235,7 @@ EncodedJSValue jsTestTypedefsAttrWithGetterException(ExecState* exec, JSObject*
 {
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestTypedefsPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'attrWithGetterException' on a non-TestTypedefs object."));
@@ -255,7 +255,7 @@ EncodedJSValue jsTestTypedefsAttrWithSetterException(ExecState* exec, JSObject*
 {
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestTypedefsPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'attrWithSetterException' on a non-TestTypedefs object."));
@@ -274,7 +274,7 @@ EncodedJSValue jsTestTypedefsStringAttrWithGetterException(ExecState* exec, JSOb
 {
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestTypedefsPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'stringAttrWithGetterException' on a non-TestTypedefs object."));
@@ -294,7 +294,7 @@ EncodedJSValue jsTestTypedefsStringAttrWithSetterException(ExecState* exec, JSOb
 {
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSTestTypedefsPrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'stringAttrWithSetterException' on a non-TestTypedefs object."));
@@ -324,13 +324,13 @@ void setJSTestTypedefsUnsignedLongLongAttr(ExecState* exec, JSObject* /* baseObj
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestTypedefs& impl = castedThis->impl();
     unsigned long long nativeValue(toUInt64(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setUnsignedLongLongAttr(nativeValue);
 }
@@ -341,13 +341,13 @@ void setJSTestTypedefsImmutableSerializedScriptValue(ExecState* exec, JSObject*
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestTypedefs& impl = castedThis->impl();
     RefPtr<SerializedScriptValue> nativeValue(SerializedScriptValue::create(exec, value, 0, 0));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setImmutableSerializedScriptValue(nativeValue);
 }
@@ -358,13 +358,13 @@ void setJSTestTypedefsAttrWithGetterException(ExecState* exec, JSObject* /* base
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestTypedefs& impl = castedThis->impl();
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setAttrWithGetterException(nativeValue);
 }
@@ -375,14 +375,14 @@ void setJSTestTypedefsAttrWithSetterException(ExecState* exec, JSObject* /* base
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestTypedefs& impl = castedThis->impl();
     ExceptionCode ec = 0;
     int nativeValue(toInt32(exec, value, NormalConversion));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setAttrWithSetterException(nativeValue, ec);
     setDOMException(exec, ec);
@@ -394,13 +394,13 @@ void setJSTestTypedefsStringAttrWithGetterException(ExecState* exec, JSObject* /
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestTypedefs& impl = castedThis->impl();
     const String& nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setStringAttrWithGetterException(nativeValue);
 }
@@ -411,14 +411,14 @@ void setJSTestTypedefsStringAttrWithSetterException(ExecState* exec, JSObject* /
     JSValue value = JSValue::decode(encodedValue);
     UNUSED_PARAM(exec);
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(JSValue::decode(thisValue));
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         throwVMTypeError(exec);
         return;
     }
     TestTypedefs& impl = castedThis->impl();
     ExceptionCode ec = 0;
     const String& nativeValue(value.isEmpty() ? String() : value.toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return;
     impl.setStringAttrWithSetterException(nativeValue, ec);
     setDOMException(exec, ec);
@@ -434,7 +434,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionFunc(ExecState* exec
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestTypedefs::info());
     TestTypedefs& impl = castedThis->impl();
@@ -446,7 +446,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionFunc(ExecState* exec
     }
 
     Vector<int> x(toNativeArray<int>(exec, exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.func(x);
     return JSValue::encode(jsUndefined());
@@ -456,20 +456,20 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionSetShadow(ExecState*
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestTypedefs::info());
     TestTypedefs& impl = castedThis->impl();
     if (exec->argumentCount() < 3)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     float width(exec->argument(0).toFloat(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     float height(exec->argument(1).toFloat(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     float blur(exec->argument(2).toFloat(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     size_t argsCount = exec->argumentCount();
@@ -479,7 +479,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionSetShadow(ExecState*
     }
 
     const String& color(exec->argument(3).isEmpty() ? String() : exec->argument(3).toString(exec)->value(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     if (argsCount <= 4) {
         impl.setShadow(width, height, blur, color);
@@ -487,7 +487,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionSetShadow(ExecState*
     }
 
     float alpha(exec->argument(4).toFloat(exec));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.setShadow(width, height, blur, color, alpha);
     return JSValue::encode(jsUndefined());
@@ -497,14 +497,14 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionMethodWithSequenceAr
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestTypedefs::info());
     TestTypedefs& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Vector<RefPtr<SerializedScriptValue>> sequenceArg((toRefPtrNativeArray<SerializedScriptValue, JSSerializedScriptValue>(exec, exec->argument(0), &toSerializedScriptValue)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = jsNumber(impl.methodWithSequenceArg(sequenceArg));
@@ -515,14 +515,14 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionNullableArrayArg(Exe
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestTypedefs::info());
     TestTypedefs& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Vector<String> arrayArg(toNativeArray<String>(exec, exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
     impl.nullableArrayArg(arrayArg);
     return JSValue::encode(jsUndefined());
@@ -532,7 +532,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionFuncWithClamp(ExecSt
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestTypedefs::info());
     TestTypedefs& impl = castedThis->impl();
@@ -540,7 +540,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionFuncWithClamp(ExecSt
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     unsigned long long arg1 = 0;
     double arg1NativeValue = exec->argument(0).toNumber(exec);
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     if (!std::isnan(arg1NativeValue))
@@ -555,7 +555,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionFuncWithClamp(ExecSt
 
     unsigned long long arg2 = 0;
     double arg2NativeValue = exec->argument(1).toNumber(exec);
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     if (!std::isnan(arg2NativeValue))
@@ -569,7 +569,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionImmutablePointFuncti
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestTypedefs::info());
     TestTypedefs& impl = castedThis->impl();
@@ -582,7 +582,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionStringArrayFunction(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestTypedefs::info());
     TestTypedefs& impl = castedThis->impl();
@@ -590,7 +590,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionStringArrayFunction(
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     ExceptionCode ec = 0;
     Vector<String> values(toNativeArray<String>(exec, exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = jsArray(exec, castedThis->globalObject(), impl.stringArrayFunction(values, ec));
@@ -602,7 +602,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionStringArrayFunction2
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestTypedefs::info());
     TestTypedefs& impl = castedThis->impl();
@@ -610,7 +610,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionStringArrayFunction2
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     ExceptionCode ec = 0;
     Vector<String> values(toNativeArray<String>(exec, exec->argument(0)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = jsArray(exec, castedThis->globalObject(), impl.stringArrayFunction2(values, ec));
@@ -622,14 +622,14 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionCallWithSequenceThat
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestTypedefs::info());
     TestTypedefs& impl = castedThis->impl();
     if (exec->argumentCount() < 1)
         return throwVMError(exec, createNotEnoughArgumentsError(exec));
     Vector<RefPtr<TestEventTarget> > sequenceArg((toRefPtrNativeArray<TestEventTarget, JSTestEventTarget>(exec, exec->argument(0), &toTestEventTarget)));
-    if (exec->hadException())
+    if (UNLIKELY(exec->hadException()))
         return JSValue::encode(jsUndefined());
 
     JSC::JSValue result = jsBoolean(impl.callWithSequenceThatRequiresInclude(sequenceArg));
@@ -640,7 +640,7 @@ EncodedJSValue JSC_HOST_CALL jsTestTypedefsPrototypeFunctionMethodWithException(
 {
     JSValue thisValue = exec->hostThisValue();
     JSTestTypedefs* castedThis = jsDynamicCast<JSTestTypedefs*>(thisValue);
-    if (!castedThis)
+    if (UNLIKELY(!castedThis))
         return throwVMTypeError(exec);
     ASSERT_GC_OBJECT_INHERITS(castedThis, JSTestTypedefs::info());
     TestTypedefs& impl = castedThis->impl();

diff --git a/Source/WebCore/bindings/scripts/test/JS/JSattribute.cpp b/Source/WebCore/bindings/scripts/test/JS/JSattribute.cpp
index 3a8ef182b9b447834f25bc7fc56e0a7942dda42d..13c191427b47975ddb4071d24991f5f123e43513 100644 (file)
--- a/Source/WebCore/bindings/scripts/test/JS/JSattribute.cpp
+++ b/Source/WebCore/bindings/scripts/test/JS/JSattribute.cpp
@@ -123,7 +123,7 @@ EncodedJSValue jsattributeReadonly(ExecState* exec, JSObject* slotBase, EncodedJ
 {
     JSattribute* castedThis = jsDynamicCast<JSattribute*>(JSValue::decode(thisValue));
     UNUSED_PARAM(slotBase);
-    if (!castedThis) {
+    if (UNLIKELY(!castedThis)) {
         if (jsDynamicCast<JSattributePrototype*>(slotBase)) {
             ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
             scriptExecutionContext->addConsoleMessage(MessageSource::JS, MessageLevel::Error, String("Deprecated attempt to access property 'readonly' on a non-attribute object."));