Regarding Inter Procedural Constant Propagation

I want to see the output of a InterProcedural Constant Propagation Pass
IPCP in llvm.
I have llvm 2.8 installed.And i used opt -print-after-all command to see
the .bc output generated after each pass.
However,this does not include dump produced by IPCP :frowning: why?
Kindly tell me how to view dump produced by IPCP.

P.S: i have tried opt -ipcp src.bc -o src1.bc
However the src.bc and src1.bc both files r identical. :frowning:

Kindly help me regarding this.