how to get expr from INDIRECT_REF

[luda_f]

Dear friends, 



I have a question in using GCC macros. May I have your help? Thanks a lot for your attention. 



For a expression of INDIRECT_REF or ADDR_EXPR, how can I get the variables from them? 

For example, for stament 

*p=&i; 



I have the code: 

expr = EXPR_STMT_EXPR(stmt); 

leftexpr = TREE_OPERAND(expr,0); 

rightexpr = TREE_OPERAND(expr,1); 



So we can get from it that: 

TREE_CODE(leftexpr)==INDIRECT_REF 

TREE_CODE(rightexpr)==ADDR_EXPR 



and how can I get variable p and i then? Is there some macros like EXPR_STMT_EXPR that can achieve this purpose? 



Thanks for your time! 



Wang Nan 

Software Engineering Institute 

Xidian University, P. R. China

 

______________________________________

===================================================================
Ãâ·ÑÊÔÓÃÐÂÀË15MÊÕ·ÑÓÊÏä ¸Ï½ôÐж¯£¡ (http://vip.sina.com/sol_mail/promotion/pro_men.html)
ÐÂÀ˶þÊÖÊг¡£ºÒ»ÔªÍ¶È룬ʮ·Ö¾ªÏ²£¬°Ù·ÖÂúÒâ (http://classad.sina.com.cn/2shou/)
ÊýÍòÕÅÊÖ»úͼƬÊýÍòÊ׶ÌÐÅÁåÉùÈÎÄãÌôÑ¡£¬Ã¿Ì춼ÓиüР(http://sms.sina.com.cn/cgi-bin/sms/smspic.cgi)