https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79185
Jeffrey A. Law <law at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[7/8/9 Regression] register |[7/8 Regression] register
|allocation in the addition |allocation in the addition
|of two 128/9 bit ints |of two 128/9 bit ints
--- Comment #13 from Jeffrey A. Law <law at redhat dot com> ---
Fixed by this change from Vlad on the trunk:
Author: vmakarov <vmakarov@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu Dec 6 18:41:46 2018 +0000
2018-12-06 Vladimir Makarov <vmaka...@redhat.com>
PR target/88282
* ira.c (ira_init_register_move_cost): Use info from
hard_regno_mode_ok instead of contains_reg_of_mode.
* ira-costs.c (contains_reg_of_mode): Don't use cost from bigger
hard register class for some fixed hard registers.
I don't know if there are any plans to backport that change. So I've just
removed the gcc-9 regression tag.
