I am trying to understand the source code for the front end of the SDCC compiler.

Later I will try writing a compiler using the SDCC. This is my for my study purpose.

Currently I am trying to  understand the cse module ("cseBBlock" function),but Iam

not able to understand how the algorithm is working from the source code . If somebody
could provide me a overview of how this function works, it would be of great help to me.

Thanks and regards,