llvm dev - Jun 2013 - [LLVMdev] How to instrument source code

Hi all,

I'm a newbie to LLVM. I'm trying to extract number of instructions from
a
program source code

I'm able to extract instruction count by analysis pass but only can print
it out using "opt load ". Can I use this obtained *instruction_count*
and
put it back in the source code.
I couldn't find any examples that instrument source code as transformation
passes modify bitcode files.

If this sounds absurd, is there any other way to extract code features and
then insert it back in source code.

Thanks,
Chris
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