[LLVMdev] Using Profile Information

[ambika]

Hi,

How can I use profile information into my pass for performing some analysis.

I tried something like:

      PassManager PassMgr = PassManager();
      cl::opt<std::string> ProfileDataFile(cl::Positional, 
cl::desc("<llvmprof.out file>"),
                  cl::Optional, cl::init("llvmprof.out"));
      PassMgr.add(createProfileLoaderPass(ProfileDataFile));
      PassMgr.run(M);
      ProfileInfo *PI;
     PI = &getAnalysis<ProfileInfo>();

But this dosent seem to work.
I want to perform profile guided analysis and thus want to use profile info.

regards,
Ambika