subject:"\[Bug tree\-optimization\/103409\] \[12 Regression\] 18% WRF compile\-time regression with \-O2 \-flto between g\:264f061997c0a534 and g\:3e09331f6aeaf595"

[Bug tree-optimization/103409] [12 Regression] 18% WRF compile-time regression with -O2 -flto between g:264f061997c0a534 and g:3e09331f6aeaf595

2021-11-25 Thread hubicka at gcc dot gnu.org via Gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103409 --- Comment #3 from Jan Hubicka --- I filled in PR103423. Interesting observation is that both regressions are cca 18% but happens at different time-ranges. This one is spec2017 WRF while the other is spec2006 WRF and neither reproduce on both.

[Bug tree-optimization/103409] [12 Regression] 18% WRF compile-time regression with -O2 -flto between g:264f061997c0a534 and g:3e09331f6aeaf595

2021-11-25 Thread hubicka at kam dot mff.cuni.cz via Gcc-bugs

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,