Changeset 36462 in webkit for trunk/JavaScriptCore/kjs/StringObjectThatMasqueradesAsUndefined.h

Timestamp:

Sep 15, 2008, 4:33:25 PM (17 years ago)

Author:

[email protected]

Message:

2008-09-15 Gavin Barraclough <​[email protected]>

Reviewed by Geoff Garen.

Inline code generation of eq_null/neq_null for CTI. Uses vptr checking for
StringObjectsThatAreMasqueradingAsBeingUndefined. In the long run, the
masquerading may be handled differently (through the StructureIDs - see bug
#20823).

1% on v8-tests.

• VM/CTI.cpp: (JSC::CTI::emitJumpSlowCaseIfIsJSCell): (JSC::CTI::privateCompileMainPass): (JSC::CTI::privateCompileSlowCases):
• VM/CTI.h:
• VM/Machine.cpp: (JSC::Machine::Machine): (JSC::Machine::cti_op_eq_null): (JSC::Machine::cti_op_neq_null):
• VM/Machine.h: (JSC::Machine::doesMasqueradesAsUndefined):
• kjs/JSWrapperObject.h: (JSC::JSWrapperObject::): (JSC::JSWrapperObject::JSWrapperObject):
• kjs/StringObject.h: (JSC::StringObject::StringObject):
• kjs/StringObjectThatMasqueradesAsUndefined.h: (JSC::StringObjectThatMasqueradesAsUndefined::StringObjectThatMasqueradesAsUndefined):

File:

• trunk/JavaScriptCore/kjs/StringObjectThatMasqueradesAsUndefined.h (modified) (1 diff)

trunk/JavaScriptCore/kjs/StringObjectThatMasqueradesAsUndefined.h

@@ -30 +30 @@
     class StringObjectThatMasqueradesAsUndefined : public StringObject {
     public:
+        StringObjectThatMasqueradesAsUndefined(VPtrStealingHackType type)
+            : StringObject(type)
+        {
+        }
         StringObjectThatMasqueradesAsUndefined(ExecState* exec, JSObject* prototype, const UString& string)
             : StringObject(exec, prototype, string)