[Bug target/79185] [7/8 Regression] register allocation in the addition of two 128/9 bit ints

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79185

Richard Biener  changed:

   What|Removed |Added

   Target Milestone|7.5 |8.4

--- Comment #14 from Richard Biener  ---
The GCC 7 branch is being closed, re-targeting to GCC 8.4.

[Bug target/79185] [7/8 Regression] register allocation in the addition of two 128/9 bit ints

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79185

Jeffrey A. Law  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  ---
Fixed by this change from Vlad on the trunk:

Author: vmakarov 
Date:   Thu Dec 6 18:41:46 2018 +

2018-12-06  Vladimir Makarov  

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.