https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98782
--- Comment #33 from pthaugen at gcc dot gnu.org --- (In reply to rsand...@gcc.gnu.org from comment #32) > Created attachment 52102 [details] > Alternative patch > > This patch is a squash of several ira tweaks that together recover the > pre-GCC11 exchange2 performance on aarch64. It isn't ready for trunk > yet (hence lack of comments and changelog). It would be great to hear > whether/how it works on other targets though. I tried the patch on a Power9 system. Execution time went from 371 seconds to 291.