[ic] Split LoadIC into LoadGlobalIC and LoadIC.

src/type-feedback-vector.cc

 // Copyright 2014 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/type-feedback-vector.h"
 
 #include "src/code-stubs.h"
 #include "src/ic/ic.h"
 #include "src/ic/ic-state.h"
 #include "src/objects.h"
@@ skipping 121 matching lines @@
 }
 
 const char* TypeFeedbackMetadata::Kind2String(FeedbackVectorSlotKind kind) {
   switch (kind) {
     case FeedbackVectorSlotKind::INVALID:
       return "INVALID";
     case FeedbackVectorSlotKind::CALL_IC:
       return "CALL_IC";
     case FeedbackVectorSlotKind::LOAD_IC:
       return "LOAD_IC";
+    case FeedbackVectorSlotKind::LOAD_GLOBAL_IC:
+      return "LOAD_GLOBAL_IC";
     case FeedbackVectorSlotKind::KEYED_LOAD_IC:
       return "KEYED_LOAD_IC";
     case FeedbackVectorSlotKind::STORE_IC:
       return "STORE_IC";
     case FeedbackVectorSlotKind::KEYED_STORE_IC:
       return "KEYED_STORE_IC";
     case FeedbackVectorSlotKind::GENERAL:
       return "STUB";
     case FeedbackVectorSlotKind::KINDS_NUMBER:
       break;
@@ skipping 77 matching lines @@
         case FeedbackVectorSlotKind::CALL_IC: {
           CallICNexus nexus(this, slot);
           nexus.Clear(shared->code());
           break;
         }
         case FeedbackVectorSlotKind::LOAD_IC: {
           LoadICNexus nexus(this, slot);
           nexus.Clear(shared->code());
           break;
         }
+        case FeedbackVectorSlotKind::LOAD_GLOBAL_IC: {
+          LoadGlobalICNexus nexus(this, slot);
+          nexus.Clear(shared->code());
+          break;
+        }
         case FeedbackVectorSlotKind::KEYED_LOAD_IC: {
           KeyedLoadICNexus nexus(this, slot);
           nexus.Clear(shared->code());
           break;
         }
         case FeedbackVectorSlotKind::STORE_IC: {
           StoreICNexus nexus(this, slot);
           nexus.Clear(shared->code());
           break;
         }
@@ skipping 181 matching lines @@
     // cleared.
     return POLYMORPHIC;
   } else if (feedback->IsWeakCell()) {
     // Don't check if the map is cleared.
     return MONOMORPHIC;
   }
 
   return UNINITIALIZED;
 }
 
+InlineCacheState LoadGlobalICNexus::StateFromFeedback() const {
+  Isolate* isolate = GetIsolate();
+  Object* feedback = GetFeedback();
+
+  if (feedback == *TypeFeedbackVector::UninitializedSentinel(isolate)) {
+    return UNINITIALIZED;
+  } else if (feedback == *TypeFeedbackVector::MegamorphicSentinel(isolate)) {
+    return MEGAMORPHIC;
+  } else if (feedback == *TypeFeedbackVector::PremonomorphicSentinel(isolate)) {
+    return PREMONOMORPHIC;
+  } else if (feedback->IsFixedArray()) {
+    // Determine state purely by our structure, don't check if the maps are
+    // cleared.
+    return POLYMORPHIC;
+  } else if (feedback->IsWeakCell()) {
+    // Don't check if the map is cleared.
+    return MONOMORPHIC;
+  }
+
+  return UNINITIALIZED;
+}
 
 InlineCacheState KeyedLoadICNexus::StateFromFeedback() const {
   Isolate* isolate = GetIsolate();
   Object* feedback = GetFeedback();
 
   if (feedback == *TypeFeedbackVector::UninitializedSentinel(isolate)) {
     return UNINITIALIZED;
   } else if (feedback == *TypeFeedbackVector::PremonomorphicSentinel(isolate)) {
     return PREMONOMORPHIC;
   } else if (feedback == *TypeFeedbackVector::MegamorphicSentinel(isolate)) {
@@ skipping 126 matching lines @@
 }
 
 
 void LoadICNexus::ConfigureMonomorphic(Handle<Map> receiver_map,
                                        Handle<Code> handler) {
   Handle<WeakCell> cell = Map::WeakCellForMap(receiver_map);
   SetFeedback(*cell);
   SetFeedbackExtra(*handler);
 }
 
+void LoadGlobalICNexus::ConfigureMonomorphic(Handle<Map> receiver_map,
+                                             Handle<Code> handler) {
+  Handle<WeakCell> cell = Map::WeakCellForMap(receiver_map);
+  SetFeedback(*cell);
+  SetFeedbackExtra(*handler);
+}
 
 void KeyedLoadICNexus::ConfigureMonomorphic(Handle<Name> name,
                                             Handle<Map> receiver_map,
                                             Handle<Code> handler) {
   Handle<WeakCell> cell = Map::WeakCellForMap(receiver_map);
   if (name.is_null()) {
     SetFeedback(*cell);
     SetFeedbackExtra(*handler);
   } else {
     Handle<FixedArray> array = EnsureExtraArrayOfSize(2);
@@ skipping 31 matching lines @@
 void LoadICNexus::ConfigurePolymorphic(MapHandleList* maps,
                                        CodeHandleList* handlers) {
   Isolate* isolate = GetIsolate();
   int receiver_count = maps->length();
   Handle<FixedArray> array = EnsureArrayOfSize(receiver_count * 2);
   InstallHandlers(array, maps, handlers);
   SetFeedbackExtra(*TypeFeedbackVector::UninitializedSentinel(isolate),
                    SKIP_WRITE_BARRIER);
 }
 
+void LoadGlobalICNexus::ConfigurePolymorphic(MapHandleList* maps,
+                                             CodeHandleList* handlers) {
+  Isolate* isolate = GetIsolate();
+  int receiver_count = maps->length();
+  Handle<FixedArray> array = EnsureArrayOfSize(receiver_count * 2);
+  InstallHandlers(array, maps, handlers);
+  SetFeedbackExtra(*TypeFeedbackVector::UninitializedSentinel(isolate),
+                   SKIP_WRITE_BARRIER);
+}
 
 void KeyedLoadICNexus::ConfigurePolymorphic(Handle<Name> name,
                                             MapHandleList* maps,
                                             CodeHandleList* handlers) {
   int receiver_count = maps->length();
   DCHECK(receiver_count > 1);
   Handle<FixedArray> array;
   if (name.is_null()) {
     array = EnsureArrayOfSize(receiver_count * 2);
     SetFeedbackExtra(*TypeFeedbackVector::UninitializedSentinel(GetIsolate()),
@@ skipping 174 matching lines @@
       code_list->Add(handle(code));
       count++;
     }
   }
   return count == length;
 }
 
 
 void LoadICNexus::Clear(Code* host) { LoadIC::Clear(GetIsolate(), host, this); }
 
+void LoadGlobalICNexus::Clear(Code* host) {
+  LoadGlobalIC::Clear(GetIsolate(), host, this);
+}
 
 void KeyedLoadICNexus::Clear(Code* host) {
   KeyedLoadIC::Clear(GetIsolate(), host, this);
 }
 
 
 Name* KeyedLoadICNexus::FindFirstName() const {
   Object* feedback = GetFeedback();
   if (IsPropertyNameFeedback(feedback)) {
     return Name::cast(feedback);
@@ skipping 59 matching lines @@
 
 IcCheckType KeyedStoreICNexus::GetKeyType() const {
   Object* feedback = GetFeedback();
   if (feedback == *TypeFeedbackVector::MegamorphicSentinel(GetIsolate())) {
     return static_cast<IcCheckType>(Smi::cast(GetFeedbackExtra())->value());
   }
   return IsPropertyNameFeedback(feedback) ? PROPERTY : ELEMENT;
 }
 }  // namespace internal
 }  // namespace v8