Added infrastructure for optimizing new CanvasArray types in WebGL...

src/ic.cc

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 247 matching lines @@
   SetTargetAtAddress(address, initialize_stub());
 }
 
 
 void KeyedStoreIC::Clear(Address address, Code* target) {
   if (target->ic_state() == UNINITIALIZED) return;
   SetTargetAtAddress(address, initialize_stub());
 }
 
 
+Code* KeyedLoadIC::external_array_stub(JSObject::ElementsKind elements_kind) {
+  switch (elements_kind) {
+    case JSObject::EXTERNAL_BYTE_ELEMENTS:
+      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalByteArray);
+    case JSObject::EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalUnsignedByteArray);
+    case JSObject::EXTERNAL_SHORT_ELEMENTS:
+      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalShortArray);
+    case JSObject::EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+      return Builtins::builtin(
+          Builtins::KeyedLoadIC_ExternalUnsignedShortArray);
+    case JSObject::EXTERNAL_INT_ELEMENTS:
+      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalIntArray);
+    case JSObject::EXTERNAL_UNSIGNED_INT_ELEMENTS:
+      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalUnsignedIntArray);
+    case JSObject::EXTERNAL_FLOAT_ELEMENTS:
+      return Builtins::builtin(Builtins::KeyedLoadIC_ExternalFloatArray);
+    default:
+      UNREACHABLE();
+      return NULL;
+  }
+}
+
+
+Code* KeyedStoreIC::external_array_stub(JSObject::ElementsKind elements_kind) {
+  switch (elements_kind) {
+    case JSObject::EXTERNAL_BYTE_ELEMENTS:
+      return Builtins::builtin(Builtins::KeyedStoreIC_ExternalByteArray);
+    case JSObject::EXTERNAL_UNSIGNED_BYTE_ELEMENTS:
+      return Builtins::builtin(
+          Builtins::KeyedStoreIC_ExternalUnsignedByteArray);
+    case JSObject::EXTERNAL_SHORT_ELEMENTS:
+      return Builtins::builtin(Builtins::KeyedStoreIC_ExternalShortArray);
+    case JSObject::EXTERNAL_UNSIGNED_SHORT_ELEMENTS:
+      return Builtins::builtin(
+          Builtins::KeyedStoreIC_ExternalUnsignedShortArray);
+    case JSObject::EXTERNAL_INT_ELEMENTS:
+      return Builtins::builtin(Builtins::KeyedStoreIC_ExternalIntArray);
+    case JSObject::EXTERNAL_UNSIGNED_INT_ELEMENTS:
+      return Builtins::builtin(Builtins::KeyedStoreIC_ExternalUnsignedIntArray);
+    case JSObject::EXTERNAL_FLOAT_ELEMENTS:
+      return Builtins::builtin(Builtins::KeyedStoreIC_ExternalFloatArray);
+    default:
+      UNREACHABLE();
+      return NULL;
+  }
+}
+
+
 static bool HasInterceptorGetter(JSObject* object) {
   return !object->GetNamedInterceptor()->getter()->IsUndefined();
 }
 
 
 static void LookupForRead(Object* object,
                           String* name,
                           LookupResult* lookup) {
   AssertNoAllocation no_gc;  // pointers must stay valid
 
@@ skipping 538 matching lines @@
     }
 
     return object->GetProperty(*object, &lookup, *name, &attr);
   }
 
   // Do not use ICs for objects that require access checks (including
   // the global object).
   bool use_ic = FLAG_use_ic && !object->IsAccessCheckNeeded();
 
   if (use_ic) {
-    set_target(generic_stub());
+    Code* stub = generic_stub();
+    if (object->IsJSObject()) {
+      Handle<JSObject> receiver = Handle<JSObject>::cast(object);
+      if (receiver->HasExternalArrayElements()) {
+        stub = external_array_stub(receiver->GetElementsKind());
+      }
+    }
+    set_target(stub);
     // For JSObjects that are not value wrappers and that do not have
     // indexed interceptors, we initialize the inlined fast case (if
     // present) by patching the inlined map check.
     if (object->IsJSObject() &&
         !object->IsJSValue() &&
         !JSObject::cast(*object)->HasIndexedInterceptor()) {
       Map* map = JSObject::cast(*object)->map();
       PatchInlinedLoad(address(), map);
     }
   }
@@ skipping 266 matching lines @@
 
     // Set the property.
     return receiver->SetProperty(*name, *value, NONE);
   }
 
   // Do not use ICs for objects that require access checks (including
   // the global object).
   bool use_ic = FLAG_use_ic && !object->IsAccessCheckNeeded();
   ASSERT(!(use_ic && object->IsJSGlobalProxy()));
 
-  if (use_ic) set_target(generic_stub());
+  if (use_ic) {
+    Code* stub = generic_stub();
+    if (object->IsJSObject()) {
+      Handle<JSObject> receiver = Handle<JSObject>::cast(object);
+      if (receiver->HasExternalArrayElements()) {
+        stub = external_array_stub(receiver->GetElementsKind());
+      }
+    }
+    set_target(stub);
+  }
 
   // Set the property.
   return Runtime::SetObjectProperty(object, key, value, NONE);
 }
 
 
 void KeyedStoreIC::UpdateCaches(LookupResult* lookup,
                                 State state,
                                 Handle<JSObject> receiver,
                                 Handle<String> name,
@@ skipping 235 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal