Question on function Recompute_Addr_Taken()

[Peng Zhao <pengzhao@xxxxxxxxxxxxxx>]

Hi,

        I have a question about the function 
ipa/local/ipl_summarize_template.h -->Recompute_Addr_Taken(),
and Set_Addr_Taken_Attrib.

        There is some comments like 
"// The preopt always set the
ST_addr_saved bit too conservatively.  So we  need to recompute them."

 // search for run-time address taken 

I don't know what do they mean and the contex. What is the meaning of 
"run-time address taken"?

        Thanks
--
                Regards

                                          Peng
  Peng Zhao   pengzhao@xxxxxxxxxxxxxx   
  http://www.cs.ualberta.ca/~pengzhao   
  TEL (Lab): (780)492-3725                  Lab:  CSC251