Add an IC for CompareNil operations

src/hydrogen.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 286 matching lines @@
   bool CheckConstPhiUses();
 
   void CollectPhis();
 
   void set_undefined_constant(HConstant* constant) {
     undefined_constant_.set(constant);
   }
   HConstant* GetConstantUndefined() const { return undefined_constant_.get(); }
   HConstant* GetConstant0();
   HConstant* GetConstant1();
+  HConstant* GetConstantSmi0();
+  HConstant* GetConstantSmi1();
   HConstant* GetConstantMinus1();
   HConstant* GetConstantTrue();
   HConstant* GetConstantFalse();
   HConstant* GetConstantHole();
+  HConstant* GetConstantNull();
   HConstant* GetInvalidContext();
 
   HBasicBlock* CreateBasicBlock();
   HArgumentsObject* GetArgumentsObject() const {
     return arguments_object_.get();
   }
 
   void SetArgumentsObject(HArgumentsObject* object) {
     arguments_object_.set(object);
   }
@@ skipping 67 matching lines @@
   void RecordUint32Instruction(HInstruction* instr) {
     if (uint32_instructions_ == NULL) {
       uint32_instructions_ = new(zone()) ZoneList<HInstruction*>(4, zone());
     }
     uint32_instructions_->Add(instr, zone());
   }
 
  private:
   HConstant* GetConstantInt32(SetOncePointer<HConstant>* pointer,
                               int32_t integer_value);
+  HConstant* GetConstantSmi(SetOncePointer<HConstant>* pointer,
+                            int32_t integer_value);
 
   void MarkAsDeoptimizingRecursively(HBasicBlock* block);
   void NullifyUnreachableInstructions();
   void InsertTypeConversions(HInstruction* instr);
   void PropagateMinusZeroChecks(HValue* value, BitVector* visited);
   void RecursivelyMarkPhiDeoptimizeOnUndefined(HPhi* phi);
   void InsertRepresentationChangeForUse(HValue* value,
                                         HValue* use_value,
                                         int use_index,
                                         Representation to);
   void InsertRepresentationChangesForValue(HValue* value);
   void InferTypes(ZoneList<HValue*>* worklist);
   void InitializeInferredTypes(int from_inclusive, int to_inclusive);
   void CheckForBackEdge(HBasicBlock* block, HBasicBlock* successor);
   void SetupInformativeDefinitionsInBlock(HBasicBlock* block);
   void SetupInformativeDefinitionsRecursively(HBasicBlock* block);
   void EliminateRedundantBoundsChecks(HBasicBlock* bb, BoundsCheckTable* table);
 
   Isolate* isolate_;
   int next_block_id_;
   HBasicBlock* entry_block_;
   HEnvironment* start_environment_;
   ZoneList<HBasicBlock*> blocks_;
   ZoneList<HValue*> values_;
   ZoneList<HPhi*>* phi_list_;
   ZoneList<HInstruction*>* uint32_instructions_;
   SetOncePointer<HConstant> undefined_constant_;
   SetOncePointer<HConstant> constant_0_;
   SetOncePointer<HConstant> constant_1_;
+  SetOncePointer<HConstant> constant_smi_0_;
+  SetOncePointer<HConstant> constant_smi_1_;
   SetOncePointer<HConstant> constant_minus1_;
   SetOncePointer<HConstant> constant_true_;
   SetOncePointer<HConstant> constant_false_;
   SetOncePointer<HConstant> constant_the_hole_;
+  SetOncePointer<HConstant> constant_null_;
   SetOncePointer<HConstant> constant_invalid_context_;
   SetOncePointer<HArgumentsObject> arguments_object_;
 
   SetOncePointer<HBasicBlock> osr_loop_entry_;
   SetOncePointer<ZoneList<HUnknownOSRValue*> > osr_values_;
 
   CompilationInfo* info_;
   Zone* zone_;
 
   bool is_recursive_;
@@ skipping 575 matching lines @@
   class CheckBuilder {
    public:
     explicit CheckBuilder(HGraphBuilder* builder);
     ~CheckBuilder() {
       if (!finished_) End();
     }
 
     HValue* CheckNotUndefined(HValue* value);
     HValue* CheckIntegerCompare(HValue* left, HValue* right, Token::Value op);
     HValue* CheckIntegerEq(HValue* left, HValue* right);
+
     void End();
 
    private:
     Zone* zone() { return builder_->zone(); }
 
     HGraphBuilder* builder_;
     bool finished_;
     HBasicBlock* failure_block_;
     HBasicBlock* merge_block_;
   };
@@ skipping 207 matching lines @@
                          ElementsKind to_elements_kind,
                          HValue* length,
                          HValue* capacity);
 
   HValue* BuildCloneShallowArray(HContext* context,
                                  HValue* boilerplate,
                                  AllocationSiteMode mode,
                                  ElementsKind kind,
                                  int length);
 
+  void BuildCompareNil(
+      HValue* value,
+      EqualityKind kind,
+      CompareNilICStub::Types types,
+      Handle<Map> map,
+      int position,
+      HIfContinuation* continuation);
+
  private:
   HGraphBuilder();
   CompilationInfo* info_;
   HGraph* graph_;
   HBasicBlock* current_block_;
   int no_side_effects_scope_count_;
 };
 
 
 class HOptimizedGraphBuilder: public HGraphBuilder, public AstVisitor {
@@ skipping 677 matching lines @@
   EmbeddedVector<char, 64> filename_;
   HeapStringAllocator string_allocator_;
   StringStream trace_;
   int indent_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_