Hydrogen: fix keyed loads with string keys

src/ast.h

 // 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.
 
 #ifndef V8_AST_H_
 #define V8_AST_H_
 
 #include "src/v8.h"
 
 #include "src/assembler.h"
@@ skipping 1730 matching lines @@
 
   bool IsStringAccess() const {
     return IsStringAccessField::decode(bit_field_);
   }
 
   // Type feedback information.
   bool IsMonomorphic() OVERRIDE { return receiver_types_.length() == 1; }
   SmallMapList* GetReceiverTypes() OVERRIDE { return &receiver_types_; }
   KeyedAccessStoreMode GetStoreMode() const OVERRIDE { return STANDARD_STORE; }
   IcCheckType GetKeyType() const OVERRIDE {
-    // PROPERTY key types currently aren't implemented for KeyedLoadICs.
-    return ELEMENT;
+    return KeyTypeField::decode(bit_field_);
   }
   bool IsUninitialized() const {
     return !is_for_call() && HasNoTypeInformation();
   }
   bool HasNoTypeInformation() const {
     return IsUninitializedField::decode(bit_field_);
   }
   void set_is_uninitialized(bool b) {
     bit_field_ = IsUninitializedField::update(bit_field_, b);
   }
   void set_is_string_access(bool b) {
     bit_field_ = IsStringAccessField::update(bit_field_, b);
   }
+  void set_key_type(IcCheckType key_type) {
+    bit_field_ = KeyTypeField::update(bit_field_, key_type);
+  }
   void mark_for_call() {
     bit_field_ = IsForCallField::update(bit_field_, true);
   }
   bool is_for_call() const { return IsForCallField::decode(bit_field_); }
 
   bool IsSuperAccess() {
     return obj()->IsSuperReference();
   }
 
   virtual FeedbackVectorRequirements ComputeFeedbackRequirements(
@@ skipping 22 matching lines @@
         obj_(obj),
         key_(key) {}
   static int parent_num_ids() { return Expression::num_ids(); }
 
  private:
   int local_id(int n) const { return base_id() + parent_num_ids() + n; }
 
   class IsForCallField : public BitField8<bool, 0, 1> {};
   class IsUninitializedField : public BitField8<bool, 1, 1> {};
   class IsStringAccessField : public BitField8<bool, 2, 1> {};
+  class KeyTypeField : public BitField8<IcCheckType, 3, 1> {};
   uint8_t bit_field_;
   FeedbackVectorICSlot property_feedback_slot_;
   Expression* obj_;
   Expression* key_;
   SmallMapList receiver_types_;
 };
 
 
 class Call FINAL : public Expression {
  public:
@@ skipping 1724 matching lines @@
 
  private:
   Zone* zone_;
   AstValueFactory* ast_value_factory_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_