src/share/vm/opto/opaquenode.hpp

rev 7063 : 8054478: C2: Incorrectly compiled char[] array access crashes JVM
Summary: propagate node replacements along control flow edges to callers
Reviewed-by: dead backbranch in main loop results in erroneous array access

*** 48,58 ****
      C->add_macro_node(this);
    }
    Node* original_loop_limit() { return req()==3 ? in(2) : NULL; }
    virtual int Opcode() const;
    virtual const Type *bottom_type() const { return TypeInt::INT; }
!   virtual Node *Identity( PhaseTransform *phase );
  };
  
  //------------------------------Opaque2Node------------------------------------
  // A node to prevent unwanted optimizations.  Allows constant folding.  Stops
  // value-numbering, most Ideal calls or Identity functions.  This Node is
--- 48,59 ----
      C->add_macro_node(this);
    }
    Node* original_loop_limit() { return req()==3 ? in(2) : NULL; }
    virtual int Opcode() const;
    virtual const Type *bottom_type() const { return TypeInt::INT; }
!   virtual Node *Identity(PhaseTransform *phase);
!   virtual Node *Ideal(PhaseGVN *phase, bool can_reshape);
  };
  
  //------------------------------Opaque2Node------------------------------------
  // A node to prevent unwanted optimizations.  Allows constant folding.  Stops
  // value-numbering, most Ideal calls or Identity functions.  This Node is