Vector ICs: ClassLiterals need to allocate a vector slot for home objects.

BUG=

Review URL: https://codereview.chromium.org/1160173004

Cr-Commit-Position: refs/heads/master@{#28827}

src/arm/full-codegen-arm.cc

@@ -1680,9 +1680,9 @@ 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.
+  // 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.
+  // 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);
@@ -2565,6 +2565,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
          FieldMemOperand(r0, JSFunction::kPrototypeOrInitialMapOffset));
   __ push(scratch);
 
+  // store_slot_index points to the vector IC slot for the next store IC used.
+  // ClassLiteral::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 (int i = 0; i < lit->properties()->length(); i++) {
     ObjectLiteral::Property* property = lit->properties()->at(i);
     Expression* value = property->value();
@@ -2587,7 +2591,8 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
     }
 
     VisitForStackValue(value);
-    EmitSetHomeObjectIfNeeded(value, 2);
+    EmitSetHomeObjectIfNeeded(value, 2,
+                              lit->SlotForHomeObject(value, &store_slot_index));
 
     switch (property->kind()) {
       case ObjectLiteral::Property::CONSTANT:
@@ -2620,6 +2625,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
 
   // constructor
   __ CallRuntime(Runtime::kToFastProperties, 1);
+
+  // Verify that compilation exactly consumed the number of store ic slots that
+  // the ClassLiteral node had to offer.
+  DCHECK(!FLAG_vector_stores || store_slot_index == lit->slot_count());
 }
 
 

src/arm64/full-codegen-arm64.cc

@@ -1652,9 +1652,9 @@ 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.
+  // 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.
+  // 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);
@@ -2255,6 +2255,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
          FieldMemOperand(x0, JSFunction::kPrototypeOrInitialMapOffset));
   __ Push(scratch);
 
+  // store_slot_index points to the vector IC slot for the next store IC used.
+  // ClassLiteral::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 (int i = 0; i < lit->properties()->length(); i++) {
     ObjectLiteral::Property* property = lit->properties()->at(i);
     Expression* value = property->value();
@@ -2277,7 +2281,8 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
     }
 
     VisitForStackValue(value);
-    EmitSetHomeObjectIfNeeded(value, 2);
+    EmitSetHomeObjectIfNeeded(value, 2,
+                              lit->SlotForHomeObject(value, &store_slot_index));
 
     switch (property->kind()) {
       case ObjectLiteral::Property::CONSTANT:
@@ -2310,6 +2315,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
 
   // constructor
   __ CallRuntime(Runtime::kToFastProperties, 1);
+
+  // Verify that compilation exactly consumed the number of store ic slots that
+  // the ClassLiteral node had to offer.
+  DCHECK(!FLAG_vector_stores || store_slot_index == lit->slot_count());
 }
 
 

src/ast-numbering.cc

@@ -437,6 +437,7 @@ void AstNumberingVisitor::VisitClassLiteral(ClassLiteral* node) {
   for (int i = 0; i < node->properties()->length(); i++) {
     VisitObjectLiteralProperty(node->properties()->at(i));
   }
+  ReserveFeedbackSlots(node);
 }
 
 

src/ast.cc

@@ -294,6 +294,41 @@ ObjectLiteralProperty::ObjectLiteralProperty(AstValueFactory* ast_value_factory,
 }
 
 
+FeedbackVectorRequirements ClassLiteral::ComputeFeedbackRequirements(
+    Isolate* isolate, const ICSlotCache* cache) {
+  if (!FLAG_vector_stores) return FeedbackVectorRequirements(0, 0);
+
+  // This logic that computes the number of slots needed for vector store
+  // ICs must mirror FullCodeGenerator::VisitClassLiteral.
+  int ic_slots = 0;
+  for (int i = 0; i < properties()->length(); i++) {
+    ObjectLiteral::Property* property = properties()->at(i);
+
+    Expression* value = property->value();
+    if (FunctionLiteral::NeedsHomeObject(value)) ic_slots++;
+  }
+
+#ifdef DEBUG
+  // FullCodeGenerator::VisitClassLiteral verifies that it consumes slot_count_
+  // slots.
+  slot_count_ = ic_slots;
+#endif
+  return FeedbackVectorRequirements(0, ic_slots);
+}
+
+
+FeedbackVectorICSlot ClassLiteral::SlotForHomeObject(Expression* value,
+                                                     int* slot_index) const {
+  if (FLAG_vector_stores && FunctionLiteral::NeedsHomeObject(value)) {
+    DCHECK(slot_index != NULL && *slot_index >= 0 && *slot_index < slot_count_);
+    FeedbackVectorICSlot slot = GetNthSlot(*slot_index);
+    *slot_index += 1;
+    return slot;
+  }
+  return FeedbackVectorICSlot::Invalid();
+}
+
+
 bool ObjectLiteral::Property::IsCompileTimeValue() {
   return kind_ == CONSTANT ||
       (kind_ == MATERIALIZED_LITERAL &&

src/ast.h

@@ -2705,6 +2705,28 @@ class ClassLiteral final : public Expression {
   // ClassLiteral can vary, so num_ids() is not a static method.
   int num_ids() const { return parent_num_ids() + 4 + properties()->length(); }
 
+  // Object literals need one feedback slot for each non-trivial value, as well
+  // as some slots for home objects.
+  FeedbackVectorRequirements ComputeFeedbackRequirements(
+      Isolate* isolate, const ICSlotCache* cache) override;
+  void SetFirstFeedbackICSlot(FeedbackVectorICSlot slot,
+                              ICSlotCache* cache) override {
+    slot_ = slot;
+  }
+  Code::Kind FeedbackICSlotKind(int index) override { return Code::STORE_IC; }
+  FeedbackVectorICSlot GetNthSlot(int n) const {
+    return FeedbackVectorICSlot(slot_.ToInt() + n);
+  }
+
+  // If value needs a home object, returns a valid feedback vector ic slot
+  // given by slot_index, and increments slot_index.
+  FeedbackVectorICSlot SlotForHomeObject(Expression* value,
+                                         int* slot_index) const;
+
+#ifdef DEBUG
+  int slot_count() const { return slot_count_; }
+#endif
+
  protected:
   ClassLiteral(Zone* zone, const AstRawString* name, Scope* scope,
                VariableProxy* class_variable_proxy, Expression* extends,
@@ -2717,7 +2739,13 @@ class ClassLiteral final : public Expression {
         extends_(extends),
         constructor_(constructor),
         properties_(properties),
-        end_position_(end_position) {}
+        end_position_(end_position),
+#ifdef DEBUG
+        slot_count_(0),
+#endif
+        slot_(FeedbackVectorICSlot::Invalid()) {
+  }
+
   static int parent_num_ids() { return Expression::num_ids(); }
 
  private:
@@ -2730,6 +2758,12 @@ class ClassLiteral final : public Expression {
   FunctionLiteral* constructor_;
   ZoneList<Property*>* properties_;
   int end_position_;
+#ifdef DEBUG
+  // slot_count_ helps validate that the logic to allocate ic slots and the
+  // logic to use them are in sync.
+  int slot_count_;
+#endif
+  FeedbackVectorICSlot slot_;
 };
 
 

src/ia32/full-codegen-ia32.cc

@@ -1612,9 +1612,9 @@ 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.
+  // 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.
+  // 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);
@@ -2477,6 +2477,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
   __ mov(scratch, FieldOperand(eax, JSFunction::kPrototypeOrInitialMapOffset));
   __ Push(scratch);
 
+  // store_slot_index points to the vector IC slot for the next store IC used.
+  // ClassLiteral::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 (int i = 0; i < lit->properties()->length(); i++) {
     ObjectLiteral::Property* property = lit->properties()->at(i);
     Expression* value = property->value();
@@ -2498,7 +2502,8 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
     }
 
     VisitForStackValue(value);
-    EmitSetHomeObjectIfNeeded(value, 2);
+    EmitSetHomeObjectIfNeeded(value, 2,
+                              lit->SlotForHomeObject(value, &store_slot_index));
 
     switch (property->kind()) {
       case ObjectLiteral::Property::CONSTANT:
@@ -2526,6 +2531,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
 
   // constructor
   __ CallRuntime(Runtime::kToFastProperties, 1);
+
+  // Verify that compilation exactly consumed the number of store ic slots that
+  // the ClassLiteral node had to offer.
+  DCHECK(!FLAG_vector_stores || store_slot_index == lit->slot_count());
 }
 
 

src/mips/full-codegen-mips.cc

@@ -1664,9 +1664,9 @@ 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.
+  // 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.
+  // 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);
@@ -2541,6 +2541,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
         FieldMemOperand(v0, JSFunction::kPrototypeOrInitialMapOffset));
   __ push(scratch);
 
+  // store_slot_index points to the vector IC slot for the next store IC used.
+  // ClassLiteral::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 (int i = 0; i < lit->properties()->length(); i++) {
     ObjectLiteral::Property* property = lit->properties()->at(i);
     Expression* value = property->value();
@@ -2563,7 +2567,8 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
     }
 
     VisitForStackValue(value);
-    EmitSetHomeObjectIfNeeded(value, 2);
+    EmitSetHomeObjectIfNeeded(value, 2,
+                              lit->SlotForHomeObject(value, &store_slot_index));
 
     switch (property->kind()) {
       case ObjectLiteral::Property::CONSTANT:
@@ -2596,6 +2601,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
 
   // constructor
   __ CallRuntime(Runtime::kToFastProperties, 1);
+
+  // Verify that compilation exactly consumed the number of store ic slots that
+  // the ClassLiteral node had to offer.
+  DCHECK(!FLAG_vector_stores || store_slot_index == lit->slot_count());
 }
 
 

src/mips64/full-codegen-mips64.cc

@@ -1663,9 +1663,9 @@ 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.
+  // 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.
+  // 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);
@@ -2540,6 +2540,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
         FieldMemOperand(v0, JSFunction::kPrototypeOrInitialMapOffset));
   __ push(scratch);
 
+  // store_slot_index points to the vector IC slot for the next store IC used.
+  // ClassLiteral::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 (int i = 0; i < lit->properties()->length(); i++) {
     ObjectLiteral::Property* property = lit->properties()->at(i);
     Expression* value = property->value();
@@ -2562,7 +2566,8 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
     }
 
     VisitForStackValue(value);
-    EmitSetHomeObjectIfNeeded(value, 2);
+    EmitSetHomeObjectIfNeeded(value, 2,
+                              lit->SlotForHomeObject(value, &store_slot_index));
 
     switch (property->kind()) {
       case ObjectLiteral::Property::CONSTANT:
@@ -2595,6 +2600,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
 
   // constructor
   __ CallRuntime(Runtime::kToFastProperties, 1);
+
+  // Verify that compilation exactly consumed the number of store ic slots that
+  // the ClassLiteral node had to offer.
+  DCHECK(!FLAG_vector_stores || store_slot_index == lit->slot_count());
 }
 
 

src/x64/full-codegen-x64.cc

@@ -1644,9 +1644,9 @@ 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.
+  // 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.
+  // 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);
@@ -2472,6 +2472,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
   __ movp(scratch, FieldOperand(rax, JSFunction::kPrototypeOrInitialMapOffset));
   __ Push(scratch);
 
+  // store_slot_index points to the vector IC slot for the next store IC used.
+  // ClassLiteral::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 (int i = 0; i < lit->properties()->length(); i++) {
     ObjectLiteral::Property* property = lit->properties()->at(i);
     Expression* value = property->value();
@@ -2493,7 +2497,8 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
     }
 
     VisitForStackValue(value);
-    EmitSetHomeObjectIfNeeded(value, 2);
+    EmitSetHomeObjectIfNeeded(value, 2,
+                              lit->SlotForHomeObject(value, &store_slot_index));
 
     switch (property->kind()) {
       case ObjectLiteral::Property::CONSTANT:
@@ -2524,6 +2529,10 @@ void FullCodeGenerator::EmitClassDefineProperties(ClassLiteral* lit) {
 
   // constructor
   __ CallRuntime(Runtime::kToFastProperties, 1);
+
+  // Verify that compilation exactly consumed the number of store ic slots that
+  // the ClassLiteral node had to offer.
+  DCHECK(!FLAG_vector_stores || store_slot_index == lit->slot_count());
 }