PPC: Vector ICs: The Oracle needs to report feedback for the object literals...

PPC: Vector ICs: The Oracle needs to report feedback for the object literals and the count operation.

Port 752b0308

Original commit message:
    The refactoring is because it's awkward and error-prone to deterimine which IC slot an
    ObjectLiteralProperty uses for feedback. The fix is for each one to know it's own slot. In the
    numbering pass, we allocate slots for the ObjectLiteral, then hand out those slots into the
    properties.

    It adds one word to the ObjectLiteralProperty expression - I'm investigating if thats a
    problem.

    This changes makes compiling the object literal cleaner across the three compilers. Also, the
    slot allocation logic in ObjectLiteral::ComputeFeedbackRequirements() was refactoring to mimic
    the style in full-codegen. This is useful since it must remain in sync with
    FullCodegen::VisitObjectLiteral().

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, dstence@us.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1331893003

Cr-Commit-Position: refs/heads/master@{#30689}

src/full-codegen/ppc/full-codegen-ppc.cc

@@ -1215,18 +1215,29 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
 }
 
 
-void FullCodeGenerator::EmitSetHomeObjectIfNeeded(Expression* initializer,
-                                                  int offset,
-                                                  FeedbackVectorICSlot slot) {
-  if (NeedsHomeObject(initializer)) {
-    __ LoadP(StoreDescriptor::ReceiverRegister(), MemOperand(sp));
-    __ mov(StoreDescriptor::NameRegister(),
-           Operand(isolate()->factory()->home_object_symbol()));
-    __ LoadP(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));
+  __ LoadP(StoreDescriptor::ReceiverRegister(), MemOperand(sp));
+  __ mov(StoreDescriptor::NameRegister(),
+         Operand(isolate()->factory()->home_object_symbol()));
+  __ LoadP(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(), r3);
+  __ mov(StoreDescriptor::NameRegister(),
+         Operand(isolate()->factory()->home_object_symbol()));
+  __ LoadP(StoreDescriptor::ValueRegister(),
+           MemOperand(sp, offset * kPointerSize));
+  if (FLAG_vector_stores) EmitLoadStoreICSlot(slot);
+  CallStoreIC();
 }
 
 
@@ -1496,12 +1507,19 @@ 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(r4, Heap::kNullValueRootIndex);
     __ push(r4);
   } 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());
+    }
   }
 }
 
@@ -1531,10 +1549,6 @@ 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;
@@ -1562,7 +1576,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
             __ mov(StoreDescriptor::NameRegister(), Operand(key->value()));
             __ LoadP(StoreDescriptor::ReceiverRegister(), MemOperand(sp));
             if (FLAG_vector_stores) {
-              EmitLoadStoreICSlot(expr->GetNthSlot(store_slot_index++));
+              EmitLoadStoreICSlot(property->GetSlot(0));
               CallStoreIC();
             } else {
               CallStoreIC(key->LiteralFeedbackId());
@@ -1570,14 +1584,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
             PrepareForBailoutForId(key->id(), NO_REGISTERS);
 
             if (NeedsHomeObject(value)) {
-              __ Move(StoreDescriptor::ReceiverRegister(), r3);
-              __ mov(StoreDescriptor::NameRegister(),
-                     Operand(isolate()->factory()->home_object_symbol()));
-              __ LoadP(StoreDescriptor::ValueRegister(), MemOperand(sp));
-              if (FLAG_vector_stores) {
-                EmitLoadStoreICSlot(expr->GetNthSlot(store_slot_index++));
-              }
-              CallStoreIC();
+              EmitSetHomeObjectAccumulator(value, 0, property->GetSlot(1));
             }
           } else {
             VisitForEffect(value);
@@ -1590,8 +1597,9 @@ 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());
+          }
           __ LoadSmiLiteral(r3, Smi::FromInt(SLOPPY));  // PropertyAttributes
           __ push(r3);
           __ CallRuntime(Runtime::kSetProperty, 4);
@@ -1609,12 +1617,12 @@ 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;
     }
@@ -1628,13 +1636,7 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
     __ push(r3);
     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));
     __ LoadSmiLiteral(r3, Smi::FromInt(NONE));
     __ push(r3);
     __ CallRuntime(Runtime::kDefineAccessorPropertyUnchecked, 5);
@@ -1669,8 +1671,9 @@ 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:
@@ -1716,10 +1719,6 @@ void FullCodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
   } else {
     context()->Plug(r3);
   }
-
-  // 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());
 }
 
 
@@ -2434,8 +2433,7 @@ void FullCodeGenerator::EmitInlineSmiBinaryOp(BinaryOperation* expr,
 }
 
 
-void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit,
-                                                  int* used_store_slots) {
+void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
   // Constructor is in r3.
   DCHECK(lit != NULL);
   __ push(r3);
@@ -2469,8 +2467,9 @@ 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: