Regarding alias analysis pass

I wanted to make a critical evaluation of the kind of aliases recognized
by basicaa (Basic Alias Analysis Pass).
aa-eval pass just gives the number of aliases discovered but not the
actual variables aliased.
i tried adding some print statements to BasicAliasAnalysis.cpp to get the
above effect.
However,my changes are not being reflected in the output.I did make and
make install. But even after,the output remained unchanged.

Kindly help me on this.
Kindly tell me how to make changes to the source files.