Vector ICs: ObjectLiteral refactoring for Oracle feedback

src/full-codegen/mips/full-codegen-mips.cc

Index: src/full-codegen/mips/full-codegen-mips.cc
diff --git a/src/full-codegen/mips/full-codegen-mips.cc b/src/full-codegen/mips/full-codegen-mips.cc
index 9e72de905d1136921f25b9ce6fa7bab9f3de031c..35747a6087be9657c3e94e7a6759798c99d69198 100644
--- a/src/full-codegen/mips/full-codegen-mips.cc
+++ b/src/full-codegen/mips/full-codegen-mips.cc
@@ -1249,18 +1249,29 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
 }
 
 
-void FullCodeGenerator::EmitSetHomeObjectIfNeeded(Expression* initializer,
-                                                  int offset,
-                                                  FeedbackVectorICSlot slot) {
-  if (NeedsHomeObject(initializer)) {
-    __ lw(StoreDescriptor::ReceiverRegister(), MemOperand(sp));
-    __ li(StoreDescriptor::NameRegister(),
-          Operand(isolate()->factory()->home_object_symbol()));
-    __ lw(StoreDescriptor::ValueRegister(),
-          MemOperand(sp, offset * kPointerSize));
-    if (FLAG_vector_stores) EmitLoadStoreICSlot(slot);
-    CallStoreIC();
-  }
+void FullCodeGenerator::EmitSetHomeObject(Expression* initializer, int offset,
+                                          FeedbackVectorICSlot slot) {
+  DCHECK(NeedsHomeObject(initializer));
+  __ lw(StoreDescriptor::ReceiverRegister(), MemOperand(sp));
+  __ li(StoreDescriptor::NameRegister(),
+        Operand(isolate()->factory()->home_object_symbol()));
+  __ lw(StoreDescriptor::ValueRegister(),
+        MemOperand(sp, offset * kPointerSize));
+  if (FLAG_vector_stores) EmitLoadStoreICSlot(slot);
+  CallStoreIC();
+}
+
+
+void FullCodeGenerator::EmitSetHomeObjectAccumulator(
+    Expression* initializer, int offset, FeedbackVectorICSlot slot) {
+  DCHECK(NeedsHomeObject(initializer));
+  __ Move(StoreDescriptor::ReceiverRegister(), v0);
+  __ li(StoreDescriptor::NameRegister(),
+        Operand(isolate()->factory()->home_object_symbol()));
+  __ lw(StoreDescriptor::ValueRegister(),
+        MemOperand(sp, offset * kPointerSize));
+  if (FLAG_vector_stores) EmitLoadStoreICSlot(slot);
+  CallStoreIC();
 }
 
 
@@ -1530,12 +1541,19 @@ void FullCodeGenerator::VisitRegExpLiteral(RegExpLiteral* expr) {
 }
 
 
-void FullCodeGenerator::EmitAccessor(Expression* expression) {
+void FullCodeGenerator::EmitAccessor(ObjectLiteralProperty* property) {
+  Expression* expression = (property == NULL) ? NULL : property->value();
   if (expression == NULL) {
     __ LoadRoot(a1, Heap::kNullValueRootIndex);
     __ push(a1);
   } else {
     VisitForStackValue(expression);
+    if (NeedsHomeObject(expression)) {
+      DCHECK(property->kind() == ObjectLiteral::Property::GETTER ||
+             property->kind() == ObjectLiteral::Property::SETTER);
+      int offset = property->kind() == ObjectLiteral::Property::GETTER ? 2 : 3;
+      EmitSetHomeObject(expression, offset, property->GetSlot());
+    }
   }
 }
 
@@ -1564,10 +1582,6 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
 
   AccessorTable accessor_table(zone());
   int property_index = 0;
-  // store_slot_index points to the vector IC slot for the next store IC used.
-  // ObjectLiteral::ComputeFeedbackRequirements controls the allocation of slots
-  // and must be updated if the number of store ICs emitted here changes.
-  int store_slot_index = 0;
   for (; property_index < expr->properties()->length(); property_index++) {
     ObjectLiteral::Property* property = expr->properties()->at(property_index);
     if (property->is_computed_name()) break;
@@ -1596,7 +1610,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
             __ li(StoreDescriptor::NameRegister(), Operand(key->value()));
             __ lw(StoreDescriptor::ReceiverRegister(), MemOperand(sp));
             if (FLAG_vector_stores) {
-              EmitLoadStoreICSlot(expr->GetNthSlot(store_slot_index++));
+              EmitLoadStoreICSlot(property->GetSlot(0));
               CallStoreIC();
             } else {
               CallStoreIC(key->LiteralFeedbackId());
@@ -1604,14 +1618,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
             PrepareForBailoutForId(key->id(), NO_REGISTERS);
 
             if (NeedsHomeObject(value)) {
-              __ Move(StoreDescriptor::ReceiverRegister(), v0);
-              __ li(StoreDescriptor::NameRegister(),
-                    Operand(isolate()->factory()->home_object_symbol()));
-              __ lw(StoreDescriptor::ValueRegister(), MemOperand(sp));
-              if (FLAG_vector_stores) {
-                EmitLoadStoreICSlot(expr->GetNthSlot(store_slot_index++));
-              }
-              CallStoreIC();
+              EmitSetHomeObjectAccumulator(value, 0, property->GetSlot(1));
             }
           } else {
             VisitForEffect(value);
@@ -1624,8 +1631,9 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
         VisitForStackValue(key);
         VisitForStackValue(value);
         if (property->emit_store()) {
-          EmitSetHomeObjectIfNeeded(
-              value, 2, expr->SlotForHomeObject(value, &store_slot_index));
+          if (NeedsHomeObject(value)) {
+            EmitSetHomeObject(value, 2, property->GetSlot());
+          }
           __ li(a0, Operand(Smi::FromInt(SLOPPY)));  // PropertyAttributes.
           __ push(a0);
           __ CallRuntime(Runtime::kSetProperty, 4);
@@ -1643,12 +1651,12 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
         break;
       case ObjectLiteral::Property::GETTER:
         if (property->emit_store()) {
-          accessor_table.lookup(key)->second->getter = value;
+          accessor_table.lookup(key)->second->getter = property;
         }
         break;
       case ObjectLiteral::Property::SETTER:
         if (property->emit_store()) {
-          accessor_table.lookup(key)->second->setter = value;
+          accessor_table.lookup(key)->second->setter = property;
         }
         break;
     }
@@ -1663,13 +1671,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
     __ push(a0);
     VisitForStackValue(it->first);
     EmitAccessor(it->second->getter);
-    EmitSetHomeObjectIfNeeded(
-        it->second->getter, 2,
-        expr->SlotForHomeObject(it->second->getter, &store_slot_index));
     EmitAccessor(it->second->setter);
-    EmitSetHomeObjectIfNeeded(
-        it->second->setter, 3,
-        expr->SlotForHomeObject(it->second->setter, &store_slot_index));
     __ li(a0, Operand(Smi::FromInt(NONE)));
     __ push(a0);
     __ CallRuntime(Runtime::kDefineAccessorPropertyUnchecked, 5);
@@ -1704,8 +1706,9 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
     } else {
       EmitPropertyKey(property, expr->GetIdForProperty(property_index));
       VisitForStackValue(value);
-      EmitSetHomeObjectIfNeeded(
-          value, 2, expr->SlotForHomeObject(value, &store_slot_index));
+      if (NeedsHomeObject(value)) {
+        EmitSetHomeObject(value, 2, property->GetSlot());
+      }
 
       switch (property->kind()) {
         case ObjectLiteral::Property::CONSTANT:
@@ -1751,10 +1754,6 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
   } else {
     context()->Plug(v0);
   }
-
-  // Verify that compilation exactly consumed the number of store ic slots that
-  // the ObjectLiteral node had to offer.
-  DCHECK(!FLAG_vector_stores || store_slot_index == expr->slot_count());
 }
 
 
@@ -2426,8 +2425,7 @@ void FullCodeGenerator::EmitInlineSmiBinaryOp(BinaryOperation* expr,
 }
 
 
-void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit,
-                                                  int* used_store_slots) {
+void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
   // Constructor is in v0.
   DCHECK(lit != NULL);
   __ push(v0);
@@ -2461,8 +2459,9 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit,
     }
 
     VisitForStackValue(value);
-    EmitSetHomeObjectIfNeeded(value, 2,
-                              lit->SlotForHomeObject(value, used_store_slots));
+    if (NeedsHomeObject(value)) {
+      EmitSetHomeObject(value, 2, property->GetSlot());
+    }
 
     switch (property->kind()) {
       case ObjectLiteral::Property::CONSTANT:
@@ -3164,7 +3163,7 @@ void FullCodeGenerator::VisitCallNew(CallNew* expr) {
 
   // Push constructor on the stack.  If it's not a function it's used as
   // receiver for CALL_NON_FUNCTION, otherwise the value on the stack is
-  // ignored.
+  // ignored.g
   DCHECK(!expr->expression()->IsSuperPropertyReference());
   VisitForStackValue(expr->expression());