Eliminatable CheckMaps replaced with if(true) or if(false).

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 96 matching lines @@
   bool IsStartBlock() const { return block_id() == 0; }
   void PostProcessLoopHeader(IterationStatement* stmt);
 
   bool IsFinished() const { return end_ != NULL; }
   void AddPhi(HPhi* phi);
   void RemovePhi(HPhi* phi);
   void AddInstruction(HInstruction* instr, int position);
   bool Dominates(HBasicBlock* other) const;
   int LoopNestingDepth() const;
 
+  void ReplaceControlWithGotoSuccessor(int succ);
+
   void SetInitialEnvironment(HEnvironment* env);
   void ClearEnvironment() {
     ASSERT(IsFinished());
     ASSERT(end()->SuccessorCount() == 0);
     last_environment_ = NULL;
   }
   bool HasEnvironment() const { return last_environment_ != NULL; }
   void UpdateEnvironment(HEnvironment* env);
   HBasicBlock* parent_loop_header() const { return parent_loop_header_; }
 
@@ skipping 66 matching lines @@
     Goto(block, position, NULL, false);
   }
 
   // Add the inlined function exit sequence, adding an HLeaveInlined
   // instruction and updating the bailout environment.
   void AddLeaveInlined(HValue* return_value,
                        FunctionState* state,
                        int position);
 
  private:
+  void MarkSuccEdgeUnreachable(int succ);
   void RegisterPredecessor(HBasicBlock* pred);
   void AddDominatedBlock(HBasicBlock* block);
 
   int block_id_;
   HGraph* graph_;
   ZoneList<HPhi*> phis_;
   HInstruction* first_;
   HInstruction* last_;
   HControlInstruction* end_;
   HLoopInformation* loop_information_;
@@ skipping 2477 matching lines @@
   }
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_H_