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new c51 V620c BUG

When I use the new update C51 compiler C51 v620c to translate the following file with SRC directive, the result seems not correct,would keil surport please check it.

#pragma SRC
unsigned int ui_MixedParms(unsigned char ucA,bit btCheck, unsigned int uiB){
  if (btCheck)
    return(ucA + uiB); 
  return(uiB - ucA);		   
}

the produced SRC fileis as follows:

; TST_C_Func2.SRC generated from: TST_C_Func2.c
NAME	TST_C_FUNC2
?PR?_ui_MixedParms?TST_C_FUNC2           SEGMENT CODE 
?DT?_ui_MixedParms?TST_C_FUNC2           SEGMENT DATA OVERLAYABLE 
?BI?_ui_MixedParms?TST_C_FUNC2           SEGMENT BIT OVERLAYABLE 
	PUBLIC	?_ui_MixedParms?BIT
	PUBLIC	?_ui_MixedParms?BYTE
	PUBLIC	_ui_MixedParms

	RSEG  ?DT?_ui_MixedParms?TST_C_FUNC2
?_ui_MixedParms?BYTE:
        uiB?042:   DS   2

	RSEG  ?BI?_ui_MixedParms?TST_C_FUNC2
?_ui_MixedParms?BIT:
    btCheck?041:   DBIT   1
; 
; unsigned int ui_MixedParms(unsigned char ucA,bit btCheck, unsigned int uiB){

	RSEG  ?PR?_ui_MixedParms?TST_C_FUNC2
_ui_MixedParms:
	USING	0
			; SOURCE LINE # 2
;---- Variable 'ucA?040' assigned to Register 'R5' ----
	MOV  	R5,AR7

;   if (btCheck)
			; SOURCE LINE # 4
	JNB  	btCheck?041,?C0001
;     return(ucA + uiB);  
			; SOURCE LINE # 5
	MOV  	A,R5
	MOV  	R6,#00H
	ADD  	A,uiB?042+01H
	MOV  	R7,A
	MOV  	A,R6
	ADDC 	A,uiB?042
	MOV  	R6,A
	RET  	
?C0001:
;   return(uiB - ucA);						   
			; SOURCE LINE # 6
	CLR  	C
	MOV  	A,uiB?042+01H
	SUBB 	A,R5
	MOV  	R7,A
	MOV  	A,uiB?042
	SUBB 	A,#00H
	MOV  	R6,A
; }
			; SOURCE LINE # 7
?C0002:
	RET  	
; END OF _ui_MixedParms

	END

the following line seems not correct,

?_ui_MixedParms?BYTE:
        uiB?042:   DS   2

it should be :

?_ui_MixedParms?BYTE:
        ucA?040:   DS   1
        uiB?042:   DS   2

Are these C51 V620c BUG?