Referenced Vars in IPA pass

[Paulo J. Matos]

Hi all,

In #gcc, it was suggested to use referenced vars to get all the
referenced vars for a function. I added to my IPA pass props,
PROP_referenced_vars , used push_cfun and then
FOR_EACH_REFERENCED_VAR, however, it just segfaults in
tree-flow-inline.h:34 :
 hti->slot = table->entries;

It was said gimple was lowered and referenced vars created before IPA
passes but I guess not due to the segfault. :(

Is there a way to get the referenced vars?

This was all due to the fact  that I wished to get a list of
referenced vars in my pass, so I was going through all the basic
blocks and statements, then found out that...
int x;
  {
      int y;
          {
              int z;
              ...
          }
      ...
 }

just happens to have three statements, all VAR_DECL,x, y, z, without
any reference to the starting and ending blocks. As a side question,
how can I get hand of where the blocks start and finish? Don't really
know if it's useful but If I need it later, better I know how.

Cheers,

-- 
Paulo Jorge Matos - pocm at soton.ac.uk
http://www.personal.soton.ac.uk/pocm
PhD Student @ ECS
University of Southampton, UK