https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103409
--- Comment #2 from hubicka at kam dot mff.cuni.cz --- > The two main changes during that time period was jump threading and modref. > modref seems might be more likely with wrf being fortran code and even using > nested functions and such. Yep, I think both are possible. There was also change enabling ipa-sra on fortran. There was yet another regression in wrf earlier that I think was related to imroving flags propagation. I think those are not by modref itself, but triggers some other pass. I wil try to look up the regression range (it was before ranger got in).
