X87: Vector ICs: ClassLiterals need to allocate a vector slot for home objects.

port b27016b7 (r28827).

original commit message:

BUG=
R=weiliang.lin@intel.com

Review URL: https://codereview.chromium.org/1178533002

Cr-Commit-Position: refs/heads/master@{#28951}

src/x87/full-codegen-x87.cc

@@ -1601,9 +1601,9 @@ 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);
@@ -2465,6 +2465,10 @@ 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();
@@ -2486,7 +2490,8 @@ 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:
@@ -2514,6 +2519,10 @@ 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());
 }