problem with -ax option

[Satyavathi Malladi]

I have used the -ax option to profile a program. The program makes some
library function calls. So, I recompiled the library with profiling turned
on for the library functions. A particular library function is called 3
times in my program. But the basic block, corresponding to the entry to
that function, is entered only for the first two times and not entered the
 3rd time. I ran the program several times and observed the same behavior.
The basic block corresponding to the exit of the library  function is
,however, entered. Could anyone pls help me figure out what the problem could be.

Thanks,
Satya