src/share/vm/c1/c1_LIR.cpp

rev 7386 : 8068945: Use RBP register as proper frame pointer in JIT compiled code on x86
Summary: Introduce the PreserveFramePointer flag to control if RBP is used as the frame pointer or as a general purpose register.
Reviewed-by: kvn, roland, dlong, enevill, shade

*** 452,462 ****
  }
  
  //-------------------visits--------------------------
  
  // complete rework of LIR instruction visitor.
! // The virtual calls for each instruction type is replaced by a big
  // switch that adds the operands for each instruction
  
  void LIR_OpVisitState::visit(LIR_Op* op) {
    // copy information from the LIR_Op
    reset();
--- 452,462 ----
  }
  
  //-------------------visits--------------------------
  
  // complete rework of LIR instruction visitor.
! // The virtual call for each instruction type is replaced by a big
  // switch that adds the operands for each instruction
  
  void LIR_OpVisitState::visit(LIR_Op* op) {
    // copy information from the LIR_Op
    reset();
*** 821,831 ****
            do_input(*opJavaCall->_arguments->adr_at(i));
          }
        }
  
        if (opJavaCall->_info)                     do_info(opJavaCall->_info);
!       if (opJavaCall->is_method_handle_invoke()) {
          opJavaCall->_method_handle_invoke_SP_save_opr = FrameMap::method_handle_invoke_SP_save_opr();
          do_temp(opJavaCall->_method_handle_invoke_SP_save_opr);
        }
        do_call();
        if (opJavaCall->_result->is_valid())       do_output(opJavaCall->_result);
--- 821,832 ----
            do_input(*opJavaCall->_arguments->adr_at(i));
          }
        }
  
        if (opJavaCall->_info)                     do_info(opJavaCall->_info);
!       if (FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr &&
!           opJavaCall->is_method_handle_invoke()) {
          opJavaCall->_method_handle_invoke_SP_save_opr = FrameMap::method_handle_invoke_SP_save_opr();
          do_temp(opJavaCall->_method_handle_invoke_SP_save_opr);
        }
        do_call();
        if (opJavaCall->_result->is_valid())       do_output(opJavaCall->_result);