I blogged about what GCCs interprocedural optimizations dohttps://kristerw.blogspot.se/2017/05/interprocedural-optimization-in-gcc.html
I wrote a follow-up post with some more information about what -fipa-pta actually dohttps://kristerw.blogspot.se/2017/06/fipa-pta.html
I wrote a follow-up post with some more information about what -fipa-pta actually do
https://kristerw.blogspot.se/2017/06/fipa-pta.html