help:how to get the Nth argument stmt from CALL_EXPR stmt tree

[alert7]

Daniel Berlin,您好！

	
	given

int a1,a2,a3,a4;
	a1 = 1 ;
	a2 = 2 ;
	a3 = 3 ;
 	a4 = 4 ;
	foo(a1+a2,a3+a4);

	I want get foo function first argument stmt tree--(a1+a2). then look the argument stmt tree OPERAND to find a1 and a2 variable.

	kind enough to give me any suggestions  ,thanks

======= 2005-07-06 11:40:00 您在来信中写道：=======
>
>i'm not sure i understand.
>
>do you want to get, given
>
>a_5 = 69
>foo(a_5)
>
>the a_5 = 69 part?
>Or a pointer a_5 inside the call to foo(..)
>
>
>
>


= = = = = = = = = = = = = = = = = = = =
			


				
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　　　　　　　　　　2005-07-11