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

src/ic.cc

Index: src/ic.cc
===================================================================
--- src/ic.cc	(revision 3095)
+++ src/ic.cc	(working copy)
@@ -265,6 +265,55 @@
 }
 
 
+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();
 }
@@ -823,7 +872,14 @@
   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.
@@ -1110,7 +1166,16 @@
   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);