Introduce FeedbackVectorSlot type - better than int.

src/ast.cc

 // Copyright 2012 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/ast.h"
 
 #include <cmath>  // For isfinite.
 #include "src/builtins.h"
 #include "src/code-stubs.h"
 #include "src/contexts.h"
@@ skipping 46 matching lines @@
   return var != NULL && var->location() == Variable::UNALLOCATED &&
          var_proxy->raw_name()->IsOneByteEqualTo("undefined");
 }
 
 
 VariableProxy::VariableProxy(Zone* zone, Variable* var, int position,
                              IdGen* id_gen)
     : Expression(zone, position, id_gen),
       raw_name_(var->raw_name()),
       interface_(var->interface()),
-      variable_feedback_slot_(kInvalidFeedbackSlot),
+      variable_feedback_slot_(FeedbackVectorSlot::Invalid()),
       is_this_(var->is_this()),
       is_assigned_(false),
       is_resolved_(false) {
   BindTo(var);
 }
 
 
 VariableProxy::VariableProxy(Zone* zone, const AstRawString* name, bool is_this,
                              Interface* interface, int position, IdGen* id_gen)
     : Expression(zone, position, id_gen),
       raw_name_(name),
       interface_(interface),
-      variable_feedback_slot_(kInvalidFeedbackSlot),
+      variable_feedback_slot_(FeedbackVectorSlot::Invalid()),
       is_this_(is_this),
       is_assigned_(false),
       is_resolved_(false) {}
 
 
 void VariableProxy::BindTo(Variable* var) {
   DCHECK(!FLAG_harmony_modules || interface_->IsUnified(var->interface()));
   DCHECK((is_this() && var->is_this()) || raw_name() == var->raw_name());
   // Ideally CONST-ness should match. However, this is very hard to achieve
   // because we don't know the exact semantics of conflicting (const and
@@ skipping 508 matching lines @@
     if (!it->isolate()->heap()->InNewSpace(*candidate)) {
       target_ = candidate;
       return true;
     }
   }
   return false;
 }
 
 
 void CallNew::RecordTypeFeedback(TypeFeedbackOracle* oracle) {
-  int allocation_site_feedback_slot = FLAG_pretenuring_call_new
-      ? AllocationSiteFeedbackSlot()
-      : CallNewFeedbackSlot();
+  FeedbackVectorSlot allocation_site_feedback_slot =
+      FLAG_pretenuring_call_new ? AllocationSiteFeedbackSlot()
+                                : CallNewFeedbackSlot();
   allocation_site_ =
       oracle->GetCallNewAllocationSite(allocation_site_feedback_slot);
   is_monomorphic_ = oracle->CallNewIsMonomorphic(CallNewFeedbackSlot());
   if (is_monomorphic_) {
     target_ = oracle->GetCallNewTarget(CallNewFeedbackSlot());
   }
 }
 
 
 void ObjectLiteral::Property::RecordTypeFeedback(TypeFeedbackOracle* oracle) {
@@ skipping 523 matching lines @@
 // static
 bool Literal::Match(void* literal1, void* literal2) {
   const AstValue* x = static_cast<Literal*>(literal1)->raw_value();
   const AstValue* y = static_cast<Literal*>(literal2)->raw_value();
   return (x->IsString() && y->IsString() && *x->AsString() == *y->AsString()) ||
          (x->IsNumber() && y->IsNumber() && x->AsNumber() == y->AsNumber());
 }
 
 
 } }  // namespace v8::internal