[stubs] Reduce number of StoreTransitionStub instances.

src/ic/handler-compiler.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/ic/handler-compiler.h"
 
 #include "src/field-type.h"
 #include "src/ic/call-optimization.h"
 #include "src/ic/handler-configuration.h"
 #include "src/ic/ic-inl.h"
@@ skipping 486 matching lines @@
   Register map_reg = StoreTransitionDescriptor::MapRegister();
 
   if (details.type() == DATA_CONSTANT) {
     DCHECK(descriptors->GetValue(descriptor)->IsJSFunction());
     GenerateRestoreMap(transition, map_reg, scratch1(), &miss);
     GenerateConstantCheck(map_reg, descriptor, value(), scratch1(), &miss);
     if (need_save_restore) {
       PopVectorAndSlot();
     }
     GenerateRestoreName(name);
-    StoreTransitionStub stub(isolate());
+    StoreMapStub stub(isolate());
     GenerateTailCall(masm(), stub.GetCode());
 
   } else {
     if (representation.IsHeapObject()) {
       GenerateFieldTypeChecks(descriptors->GetFieldType(descriptor), value(),
                               &miss);
     }
     StoreTransitionStub::StoreMode store_mode =
         Map::cast(transition->GetBackPointer())->unused_property_fields() == 0
             ? StoreTransitionStub::ExtendStorageAndStoreMapAndValue
             : StoreTransitionStub::StoreMapAndValue;
     GenerateRestoreMap(transition, map_reg, scratch1(), &miss);
     if (need_save_restore) {
       PopVectorAndSlot();
     }
-    GenerateRestoreName(name);
-    StoreTransitionStub stub(isolate(),
-                             FieldIndex::ForDescriptor(*transition, descriptor),
-                             representation, store_mode);
+    // We need to pass name on the stack.
+    PopReturnAddress(this->name());
+    __ Push(name);
+    PushReturnAddress(this->name());
+
+    FieldIndex index = FieldIndex::ForDescriptor(*transition, descriptor);
+    __ Move(StoreNamedTransitionDescriptor::FieldOffsetRegister(),
+            Smi::FromInt(index.index() << kPointerSizeLog2));
+
+    StoreTransitionStub stub(isolate(), index.is_inobject(), representation,
+                             store_mode);
     GenerateTailCall(masm(), stub.GetCode());
   }
 
   __ bind(&miss);
   if (need_save_restore) {
     PopVectorAndSlot();
   }
   GenerateRestoreName(name);
   TailCallBuiltin(masm(), MissBuiltin(kind()));
 
@@ skipping 119 matching lines @@
 }
 
 void ElementHandlerCompiler::CompileElementHandlers(
     MapHandleList* receiver_maps, List<Handle<Object>>* handlers) {
   for (int i = 0; i < receiver_maps->length(); ++i) {
     handlers->Add(GetKeyedLoadHandler(receiver_maps->at(i), isolate()));
   }
 }
 }  // namespace internal
 }  // namespace v8