https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108141
--- Comment #7 from Vladimir Makarov <vmakarov at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #6) > The change has been reverted, so this is no longer a regression. Just for the info. The patch I reverted resulted in wrong calculation of pressure classes (there was a single pressure class ALL_REGS). This affected register pressure calculation and as a consequence using one region only. W/o the patch IRA uses regional register allocation for the loops in the test. I pushed another patch for PR90706. I hope it will not create such problems as the previous patch.
