Revert "Revert "Reland 21774: Generate KeyedLoadGeneric with Hydrogen""

src/hydrogen.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_HYDROGEN_H_
 #define V8_HYDROGEN_H_
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
@@ skipping 1291 matching lines @@
   // When initializing arrays, we'll unfold the loop if the number of elements
   // is known at compile time and is <= kElementLoopUnrollThreshold.
   static const int kElementLoopUnrollThreshold = 8;
 
  protected:
   virtual bool BuildGraph() = 0;
 
   HBasicBlock* CreateBasicBlock(HEnvironment* env);
   HBasicBlock* CreateLoopHeaderBlock();
 
+  template <class BitFieldClass>
+  HValue* BuildDecodeField(HValue* encoded_field) {
+    HValue* shifted_field = AddUncasted<HShr>(encoded_field,
+        Add<HConstant>(static_cast<int>(BitFieldClass::kShift)));
+    HValue* mask_value = Add<HConstant>(static_cast<int>(BitFieldClass::kMask));
+    return AddUncasted<HBitwise>(Token::BIT_AND, shifted_field, mask_value);
+  }
+
+  HValue* BuildGetElementsKind(HValue* object);
+
   HValue* BuildCheckHeapObject(HValue* object);
   HValue* BuildCheckString(HValue* string);
   HValue* BuildWrapReceiver(HValue* object, HValue* function);
 
   // Building common constructs
   HValue* BuildCheckForCapacityGrow(HValue* object,
                                     HValue* elements,
                                     ElementsKind kind,
                                     HValue* length,
                                     HValue* key,
                                     bool is_js_array,
                                     PropertyAccessType access_type);
 
   HValue* BuildCopyElementsOnWrite(HValue* object,
                                    HValue* elements,
                                    ElementsKind kind,
                                    HValue* length);
 
   void BuildTransitionElementsKind(HValue* object,
                                    HValue* map,
                                    ElementsKind from_kind,
                                    ElementsKind to_kind,
                                    bool is_jsarray);
 
   HValue* BuildNumberToString(HValue* object, Type* type);
 
+  void BuildJSObjectCheck(HValue* receiver,
+                          int bit_field_mask);
+
+  // Checks a key value that's being used for a keyed element access context. If
+  // the key is a index, i.e. a smi or a number in a unique string with a cached
+  // numeric value, the "true" of the continuation is joined. Otherwise,
+  // if the key is a name or a unique string, the "false" of the continuation is
+  // joined. Otherwise, a deoptimization is triggered. In both paths of the
+  // continuation, the key is pushed on the top of the environment.
+  void BuildKeyedIndexCheck(HValue* key,
+                            HIfContinuation* join_continuation);
+
+  // Checks the properties of an object if they are in dictionary case, in which
+  // case "true" of continuation is taken, otherwise the "false"
+  void BuildTestForDictionaryProperties(HValue* object,
+                                        HIfContinuation* continuation);
+
+  void BuildNonGlobalObjectCheck(HValue* receiver);
+
+  HValue* BuildKeyedLookupCacheHash(HValue* object,
+                                    HValue* key);
+
   HValue* BuildUncheckedDictionaryElementLoad(HValue* receiver,
-                                              HValue* key);
+                                              HValue* elements,
+                                              HValue* key,
+                                              HValue* hash);
 
   HValue* BuildRegExpConstructResult(HValue* length,
                                      HValue* index,
                                      HValue* input);
 
   // Allocates a new object according with the given allocation properties.
   HAllocate* BuildAllocate(HValue* object_size,
                            HType type,
                            InstanceType instance_type,
                            HAllocationMode allocation_mode);
@@ skipping 317 matching lines @@
     HInstruction* increment_;
     HPhi* phi_;
     HBasicBlock* header_block_;
     HBasicBlock* body_block_;
     HBasicBlock* exit_block_;
     HBasicBlock* exit_trampoline_block_;
     Direction direction_;
     bool finished_;
   };
 
+  template <class A, class P1>
+  void DeoptimizeIf(P1 p1, char* const reason) {
+    IfBuilder builder(this);
+    builder.If<A>(p1);
+    builder.ThenDeopt(reason);
+  }
+
+  template <class A, class P1, class P2>
+  void DeoptimizeIf(P1 p1, P2 p2, const char* reason) {
+    IfBuilder builder(this);
+    builder.If<A>(p1, p2);
+    builder.ThenDeopt(reason);
+  }
+
+  template <class A, class P1, class P2, class P3>
+  void DeoptimizeIf(P1 p1, P2 p2, P3 p3, const char* reason) {
+    IfBuilder builder(this);
+    builder.If<A>(p1, p2, p3);
+    builder.ThenDeopt(reason);
+  }
+
   HValue* BuildNewElementsCapacity(HValue* old_capacity);
 
   class JSArrayBuilder V8_FINAL {
    public:
     JSArrayBuilder(HGraphBuilder* builder,
                    ElementsKind kind,
                    HValue* allocation_site_payload,
                    HValue* constructor_function,
                    AllocationSiteOverrideMode override_mode);
 
@@ skipping 1152 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_