X87: Encapsulate the holder in the PropertyHolderCompilers

src/x87/stub-cache-x87.cc

Index: src/x87/stub-cache-x87.cc
diff --git a/src/x87/stub-cache-x87.cc b/src/x87/stub-cache-x87.cc
index 75137d5133dee0b77640f3f8d2113de5442ed779..b5a30bb74308a21d0f0a9a6f8cbd0c15ca9c21c3 100644
--- a/src/x87/stub-cache-x87.cc
+++ b/src/x87/stub-cache-x87.cc
@@ -417,10 +417,10 @@ void NamedStoreHandlerCompiler::GenerateNegativeHolderLookup(
 // 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);
@@ -471,13 +471,12 @@ void NamedStoreHandlerCompiler::GenerateStoreTransition(
     __ fstp_d(FieldOperand(storage_reg, HeapNumber::kValueOffset));
   }
 
-  // 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.
@@ -517,14 +516,14 @@ void NamedStoreHandlerCompiler::GenerateStoreTransition(
   // 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 {
@@ -692,8 +691,8 @@ void PropertyAccessCompiler::GenerateTailCall(MacroAssembler* 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()));
 
@@ -711,7 +710,7 @@ Register PropertyHandlerCompiler::CheckPrototypes(
     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)) {
@@ -824,14 +823,14 @@ void NamedStoreHandlerCompiler::FrontendFooter(Handle<Name> name, Label* miss) {
 
 
 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();
@@ -881,8 +880,7 @@ Register NamedLoadHandlerCompiler::CallbackFrontend(Register object_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());
@@ -941,11 +939,11 @@ void NamedLoadHandlerCompiler::GenerateLoadConstant(Handle<Object> value) {
 }
 
 
-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
@@ -975,7 +973,7 @@ void NamedLoadHandlerCompiler::GenerateLoadInterceptor(
     // 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);
 
@@ -994,7 +992,7 @@ void NamedLoadHandlerCompiler::GenerateLoadInterceptor(
       // 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
@@ -1022,13 +1020,13 @@ void NamedLoadHandlerCompiler::GenerateLoadInterceptor(
       // 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 =
@@ -1041,9 +1039,9 @@ void NamedLoadHandlerCompiler::GenerateLoadInterceptor(
 
 
 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());
@@ -1113,7 +1111,7 @@ void NamedStoreHandlerCompiler::GenerateStoreViaSetter(
 
 
 Handle<Code> NamedStoreHandlerCompiler::CompileStoreInterceptor(
-    Handle<JSObject> object, Handle<Name> name) {
+    Handle<Name> name) {
   __ pop(scratch1());  // remove the return address
   __ push(receiver());
   __ push(this->name());
@@ -1171,8 +1169,8 @@ Handle<Code> PropertyICCompiler::CompileKeyedStorePolymorphic(
 
 
 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.
@@ -1255,11 +1253,10 @@ void NamedLoadHandlerCompiler::GenerateLoadViaGetter(
 
 
 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()) {