Encapsulate the holder in the PropertyHolderCompilers

src/ia32/stub-cache-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/codegen.h"
 #include "src/ic-inl.h"
@@ skipping 399 matching lines @@
   } else if (!holder->HasFastProperties() && !holder->IsJSGlobalProxy()) {
     GenerateDictionaryNegativeLookup(
         masm, miss, holder_reg, name, scratch1(), scratch2());
   }
 }
 
 
 // Receiver_reg is preserved on jumps to miss_label, but may be destroyed if
 // store is successful.
 void NamedStoreHandlerCompiler::GenerateStoreTransition(
-    MacroAssembler* masm, Handle<JSObject> object, LookupResult* lookup,
-    Handle<Map> transition, Handle<Name> name, Register receiver_reg,
-    Register storage_reg, Register value_reg, Register scratch1,
-    Register scratch2, Register unused, Label* miss_label, Label* slow) {
+    MacroAssembler* masm, LookupResult* lookup, Handle<Map> transition,
+    Handle<Name> name, Register receiver_reg, Register storage_reg,
+    Register value_reg, Register scratch1, Register scratch2, Register unused,
+    Label* miss_label, Label* slow) {
   int descriptor = transition->LastAdded();
   DescriptorArray* descriptors = transition->instance_descriptors();
   PropertyDetails details = descriptors->GetDetails(descriptor);
   Representation representation = details.representation();
   ASSERT(!representation.IsNone());
 
   if (details.type() == CONSTANT) {
     Handle<Object> constant(descriptors->GetValue(descriptor), masm->isolate());
     __ CmpObject(value_reg, constant);
     __ j(not_equal, miss_label);
@@ skipping 28 matching lines @@
 
     __ bind(&heap_number);
     __ CheckMap(value_reg, masm->isolate()->factory()->heap_number_map(),
                 miss_label, DONT_DO_SMI_CHECK);
     __ movsd(xmm0, FieldOperand(value_reg, HeapNumber::kValueOffset));
 
     __ bind(&do_store);
     __ movsd(FieldOperand(storage_reg, HeapNumber::kValueOffset), xmm0);
   }
 
-  // Stub never generated for non-global objects that require access
-  // checks.
-  ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded());
+  // Stub never generated for objects that require access checks.
+  ASSERT(!transition->is_access_check_needed());
 
   // Perform map transition for the receiver if necessary.
   if (details.type() == FIELD &&
-      object->map()->unused_property_fields() == 0) {
+      Map::cast(transition->GetBackPointer())->unused_property_fields() == 0) {
     // The properties must be extended before we can store the value.
     // We jump to a runtime call that extends the properties array.
     __ pop(scratch1);  // Return address.
     __ push(receiver_reg);
     __ push(Immediate(transition));
     __ push(value_reg);
     __ push(scratch1);
     __ TailCallExternalReference(
         ExternalReference(IC_Utility(IC::kSharedStoreIC_ExtendStorage),
                           masm->isolate()),
@@ skipping 20 matching lines @@
     __ ret(0);
     return;
   }
 
   int index = transition->instance_descriptors()->GetFieldIndex(
       transition->LastAdded());
 
   // Adjust for the number of properties stored in the object. Even in the
   // face of a transition we can use the old map here because the size of the
   // object and the number of in-object properties is not going to change.
-  index -= object->map()->inobject_properties();
+  index -= transition->inobject_properties();
 
   SmiCheck smi_check = representation.IsTagged()
       ? INLINE_SMI_CHECK : OMIT_SMI_CHECK;
   // TODO(verwaest): Share this code as a code stub.
   if (index < 0) {
     // Set the property straight into the object.
-    int offset = object->map()->instance_size() + (index * kPointerSize);
+    int offset = transition->instance_size() + (index * kPointerSize);
     if (representation.IsDouble()) {
       __ mov(FieldOperand(receiver_reg, offset), storage_reg);
     } else {
       __ mov(FieldOperand(receiver_reg, offset), value_reg);
     }
 
     if (!representation.IsSmi()) {
       // Update the write barrier for the array address.
       if (!representation.IsDouble()) {
         __ mov(storage_reg, value_reg);
@@ skipping 149 matching lines @@
                                               Handle<Code> code) {
   __ jmp(code, RelocInfo::CODE_TARGET);
 }
 
 
 #undef __
 #define __ ACCESS_MASM(masm())
 
 
 Register PropertyHandlerCompiler::CheckPrototypes(
-    Register object_reg, Handle<JSObject> holder, Register holder_reg,
-    Register scratch1, Register scratch2, Handle<Name> name, Label* miss,
+    Register object_reg, Register holder_reg, Register scratch1,
+    Register scratch2, Handle<Name> name, Label* miss,
     PrototypeCheckType check) {
   Handle<Map> receiver_map(IC::TypeToMap(*type(), isolate()));
 
   // Make sure there's no overlap between holder and object registers.
   ASSERT(!scratch1.is(object_reg) && !scratch1.is(holder_reg));
   ASSERT(!scratch2.is(object_reg) && !scratch2.is(holder_reg)
          && !scratch2.is(scratch1));
 
   // Keep track of the current object in register reg.
   Register reg = object_reg;
   int depth = 0;
 
   Handle<JSObject> current = Handle<JSObject>::null();
   if (type()->IsConstant())
     current = Handle<JSObject>::cast(type()->AsConstant()->Value());
   Handle<JSObject> prototype = Handle<JSObject>::null();
   Handle<Map> current_map = receiver_map;
-  Handle<Map> holder_map(holder->map());
+  Handle<Map> holder_map(holder()->map());
   // Traverse the prototype chain and check the maps in the prototype chain for
   // fast and global objects or do negative lookup for normal objects.
   while (!current_map.is_identical_to(holder_map)) {
     ++depth;
 
     // Only global objects and objects that do not require access
     // checks are allowed in stubs.
     ASSERT(current_map->IsJSGlobalProxyMap() ||
            !current_map->is_access_check_needed());
 
@@ skipping 92 matching lines @@
     Label success;
     __ jmp(&success);
     GenerateRestoreName(masm(), miss, name);
     TailCallBuiltin(masm(), MissBuiltin(kind()));
     __ bind(&success);
   }
 }
 
 
 Register NamedLoadHandlerCompiler::CallbackFrontend(Register object_reg,
-                                                    Handle<JSObject> holder,
                                                     Handle<Name> name,
                                                     Handle<Object> callback) {
   Label miss;
 
-  Register reg = FrontendHeader(object_reg, holder, name, &miss);
+  Register reg = FrontendHeader(object_reg, name, &miss);
 
-  if (!holder->HasFastProperties() && !holder->IsJSGlobalObject()) {
+  if (!holder()->HasFastProperties()) {
+    ASSERT(!holder()->IsGlobalObject());
     ASSERT(!reg.is(scratch2()));
     ASSERT(!reg.is(scratch3()));
     Register dictionary = scratch1();
     bool must_preserve_dictionary_reg = reg.is(dictionary);
 
     // Load the properties dictionary.
     if (must_preserve_dictionary_reg) {
       __ push(dictionary);
     }
     __ mov(dictionary, FieldOperand(reg, JSObject::kPropertiesOffset));
@@ skipping 29 matching lines @@
     __ cmp(scratch3(), callback);
     __ j(not_equal, &miss);
   }
 
   FrontendFooter(name, &miss);
   return reg;
 }
 
 
 void NamedLoadHandlerCompiler::GenerateLoadField(
-    Register reg, Handle<JSObject> holder, FieldIndex field,
-    Representation representation) {
+    Register reg, FieldIndex field, Representation representation) {
   if (!reg.is(receiver())) __ mov(receiver(), reg);
   LoadFieldStub stub(isolate(), field);
   GenerateTailCall(masm(), stub.GetCode());
 }
 
 
 void NamedLoadHandlerCompiler::GenerateLoadCallback(
     Register reg, Handle<ExecutableAccessorInfo> callback) {
   // Insert additional parameters into the stack frame above return address.
   ASSERT(!scratch3().is(reg));
@@ skipping 38 matching lines @@
 }
 
 
 void NamedLoadHandlerCompiler::GenerateLoadConstant(Handle<Object> value) {
   // Return the constant value.
   __ LoadObject(eax, value);
   __ ret(0);
 }
 
 
-void NamedLoadHandlerCompiler::GenerateLoadInterceptor(
-    Register holder_reg, Handle<JSObject> interceptor_holder,
-    LookupResult* lookup, Handle<Name> name) {
-  ASSERT(interceptor_holder->HasNamedInterceptor());
-  ASSERT(!interceptor_holder->GetNamedInterceptor()->getter()->IsUndefined());
+void NamedLoadHandlerCompiler::GenerateLoadInterceptor(Register holder_reg,
+                                                       LookupResult* lookup,
+                                                       Handle<Name> name) {
+  ASSERT(holder()->HasNamedInterceptor());
+  ASSERT(!holder()->GetNamedInterceptor()->getter()->IsUndefined());
 
   // So far the most popular follow ups for interceptor loads are FIELD
   // and CALLBACKS, so inline only them, other cases may be added
   // later.
   bool compile_followup_inline = false;
   if (lookup->IsFound() && lookup->IsCacheable()) {
     if (lookup->IsField()) {
       compile_followup_inline = true;
     } else if (lookup->type() == CALLBACKS &&
                lookup->GetCallbackObject()->IsExecutableAccessorInfo()) {
       Handle<ExecutableAccessorInfo> callback(
           ExecutableAccessorInfo::cast(lookup->GetCallbackObject()));
       compile_followup_inline =
           callback->getter() != NULL &&
           ExecutableAccessorInfo::IsCompatibleReceiverType(isolate(), callback,
                                                            type());
     }
   }
 
   if (compile_followup_inline) {
     // Compile the interceptor call, followed by inline code to load the
     // property from further up the prototype chain if the call fails.
     // Check that the maps haven't changed.
     ASSERT(holder_reg.is(receiver()) || holder_reg.is(scratch1()));
 
     // Preserve the receiver register explicitly whenever it is different from
     // the holder and it is needed should the interceptor return without any
     // result. The CALLBACKS case needs the receiver to be passed into C++ code,
     // the FIELD case might cause a miss during the prototype check.
-    bool must_perfrom_prototype_check = *interceptor_holder != lookup->holder();
+    bool must_perfrom_prototype_check = *holder() != lookup->holder();
     bool must_preserve_receiver_reg = !receiver().is(holder_reg) &&
         (lookup->type() == CALLBACKS || must_perfrom_prototype_check);
 
     // Save necessary data before invoking an interceptor.
     // Requires a frame to make GC aware of pushed pointers.
     {
       FrameScope frame_scope(masm(), StackFrame::INTERNAL);
 
       if (must_preserve_receiver_reg) {
         __ push(receiver());
       }
       __ push(holder_reg);
       __ push(this->name());
 
       // Invoke an interceptor.  Note: map checks from receiver to
       // interceptor's holder has been compiled before (see a caller
       // of this method.)
       CompileCallLoadPropertyWithInterceptor(
-          masm(), receiver(), holder_reg, this->name(), interceptor_holder,
+          masm(), receiver(), holder_reg, this->name(), holder(),
           IC::kLoadPropertyWithInterceptorOnly);
 
       // Check if interceptor provided a value for property.  If it's
       // the case, return immediately.
       Label interceptor_failed;
       __ cmp(eax, factory()->no_interceptor_result_sentinel());
       __ j(equal, &interceptor_failed);
       frame_scope.GenerateLeaveFrame();
       __ ret(0);
 
       // Clobber registers when generating debug-code to provoke errors.
       __ bind(&interceptor_failed);
       if (FLAG_debug_code) {
         __ mov(receiver(), Immediate(BitCast<int32_t>(kZapValue)));
         __ mov(holder_reg, Immediate(BitCast<int32_t>(kZapValue)));
         __ mov(this->name(), Immediate(BitCast<int32_t>(kZapValue)));
       }
 
       __ pop(this->name());
       __ pop(holder_reg);
       if (must_preserve_receiver_reg) {
         __ pop(receiver());
       }
 
       // Leave the internal frame.
     }
 
-    GenerateLoadPostInterceptor(holder_reg, interceptor_holder, name, lookup);
+    GenerateLoadPostInterceptor(holder_reg, name, lookup);
   } else {  // !compile_followup_inline
     // Call the runtime system to load the interceptor.
     // Check that the maps haven't changed.
     __ pop(scratch2());  // save old return address
-    PushInterceptorArguments(masm(), receiver(), holder_reg,
-                             this->name(), interceptor_holder);
+    PushInterceptorArguments(masm(), receiver(), holder_reg, this->name(),
+                             holder());
     __ push(scratch2());  // restore old return address
 
     ExternalReference ref =
         ExternalReference(IC_Utility(IC::kLoadPropertyWithInterceptor),
                           isolate());
     __ TailCallExternalReference(
         ref, NamedLoadHandlerCompiler::kInterceptorArgsLength, 1);
   }
 }
 
 
 Handle<Code> NamedStoreHandlerCompiler::CompileStoreCallback(
-    Handle<JSObject> object, Handle<JSObject> holder, Handle<Name> name,
+    Handle<JSObject> object, Handle<Name> name,
     Handle<ExecutableAccessorInfo> callback) {
-  Register holder_reg = Frontend(receiver(), holder, name);
+  Register holder_reg = Frontend(receiver(), name);
 
   __ pop(scratch1());  // remove the return address
   __ push(receiver());
   __ push(holder_reg);
   __ Push(callback);
   __ Push(name);
   __ push(value());
   __ push(scratch1());  // restore return address
 
   // Do tail-call to the runtime system.
@@ skipping 49 matching lines @@
   }
   __ ret(0);
 }
 
 
 #undef __
 #define __ ACCESS_MASM(masm())
 
 
 Handle<Code> NamedStoreHandlerCompiler::CompileStoreInterceptor(
-    Handle<JSObject> object, Handle<Name> name) {
+    Handle<Name> name) {
   __ pop(scratch1());  // remove the return address
   __ push(receiver());
   __ push(this->name());
   __ push(value());
   __ push(scratch1());  // restore return address
 
   // Do tail-call to the runtime system.
   ExternalReference store_ic_property = ExternalReference(
       IC_Utility(IC::kStorePropertyWithInterceptor), isolate());
   __ TailCallExternalReference(store_ic_property, 3, 1);
@@ skipping 37 matching lines @@
   }
   __ bind(&miss);
   TailCallBuiltin(masm(), MissBuiltin(kind()));
 
   // Return the generated code.
   return GetCode(kind(), Code::NORMAL, factory()->empty_string(), POLYMORPHIC);
 }
 
 
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadNonexistent(
-    Handle<JSObject> last, Handle<Name> name) {
-  NonexistentFrontend(last, name);
+    Handle<Name> name) {
+  NonexistentFrontend(name);
 
   // Return undefined if maps of the full prototype chain are still the
   // same and no global property with this name contains a value.
   __ mov(eax, isolate()->factory()->undefined_value());
   __ ret(0);
 
   // Return the generated code.
   return GetCode(kind(), Code::FAST, name);
 }
 
@@ skipping 62 matching lines @@
   }
   __ ret(0);
 }
 
 
 #undef __
 #define __ ACCESS_MASM(masm())
 
 
 Handle<Code> NamedLoadHandlerCompiler::CompileLoadGlobal(
-    Handle<GlobalObject> global, Handle<PropertyCell> cell, Handle<Name> name,
-    bool is_dont_delete) {
+    Handle<PropertyCell> cell, Handle<Name> name, bool is_dont_delete) {
   Label miss;
 
-  FrontendHeader(receiver(), global, name, &miss);
+  FrontendHeader(receiver(), name, &miss);
   // Get the value from the cell.
   Register result = StoreIC::ValueRegister();
   if (masm()->serializer_enabled()) {
     __ mov(result, Immediate(cell));
     __ mov(result, FieldOperand(result, PropertyCell::kValueOffset));
   } else {
     __ mov(result, Operand::ForCell(cell));
   }
 
   // Check for deleted property if property can actually be deleted.
@@ skipping 120 matching lines @@
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32