Fasterify ICSlotCache

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 84 matching lines @@
   set_var(var);
   set_is_resolved();
   var->set_is_used();
 }
 
 
 void VariableProxy::SetFirstFeedbackICSlot(FeedbackVectorICSlot slot,
                                            ICSlotCache* cache) {
   variable_feedback_slot_ = slot;
   if (var()->IsUnallocated()) {
-    cache->Add(VariableICSlotPair(var(), slot));
+    cache->Put(var(), slot);
   }
 }
 
 
 FeedbackVectorRequirements VariableProxy::ComputeFeedbackRequirements(
     Isolate* isolate, const ICSlotCache* cache) {
   if (UsesVariableFeedbackSlot()) {
     // VariableProxies that point to the same Variable within a function can
     // make their loads from the same IC slot.
     if (var()->IsUnallocated()) {
-      for (int i = 0; i < cache->length(); i++) {
-        VariableICSlotPair& pair = cache->at(i);
-        if (pair.variable() == var()) {
-          variable_feedback_slot_ = pair.slot();
-          return FeedbackVectorRequirements(0, 0);
-        }
+      ZoneHashMap::Entry* entry = cache->Get(var());
+      if (entry != NULL) {
+        variable_feedback_slot_ = FeedbackVectorICSlot(
+            static_cast<int>(reinterpret_cast<intptr_t>(entry->value)));
+        return FeedbackVectorRequirements(0, 0);
       }
     }
     return FeedbackVectorRequirements(0, 1);
   }
   return FeedbackVectorRequirements(0, 0);
 }
 
 
 static int GetStoreICSlots(Expression* expr) {
   int ic_slots = 0;
@@ skipping 1019 matching lines @@
 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 internal
 }  // namespace v8