Assume

one letter var names

struct/program has only ints

no struct vars inside structs

cannot handle double indirection

cannot handle (*p).f

To do:

       - The lexer can be enhanced to recognise
         all types(other than just int's).
       - The information for the creation of the graph Gpe
         is available in the program. The change to be made
         is to combine the prefix sets as the equivalence
         classes are merged - then the graph can be interpreted.

The main exe is pe_anal.exe
to run:

> pe_anal.exe <input file>

Tested on : DJGPP for WIn 98 (obtained from www.delorie.com/djgpp)
