[Bug target/99531] [11 Regression] Performance regression since gcc 9 (argument passing / register allocation)

["olegendo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99531

Oleg Endo <olegendo at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |olegendo at gcc dot gnu.org

--- Comment #11 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to GCC Commits from comment #5)
> The master branch has been updated by Vladimir Makarov
> <vmakarov@gcc.gnu.org>:
> 
> https://gcc.gnu.org/g:a7acb6dca941db2b1c135107dac3a34a20650d5c
> 
> commit r12-5944-ga7acb6dca941db2b1c135107dac3a34a20650d5c
> Author: Vladimir N. Makarov <vmakarov@redhat.com>
> Date:   Mon Dec 13 13:48:12 2021 -0500
> 
>     [PR99531] Modify pseudo class cost calculation when processing move
> involving the pseudo and a hard register
>     
>     Pseudo class calculated on the 1st iteration should not have a
>     special treatment in cost calculation when processing move involving
>     the pseudo and a hard register.
>     
>     gcc/ChangeLog:
>     
>             PR target/99531
>             * ira-costs.c (record_operand_costs): Do not take pseudo class
>             calculated on the 1st iteration into account when processing move
>             involving the pseudo and a hard register.
>     
>     gcc/testsuite/ChangeLog:
>     
>             PR target/99531
>             * gcc.target/i386/pr99531.c: New test.


This caused PR 115148