https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115148
--- Comment #12 from John Paul Adrian Glaubitz <glaubitz at physik dot
fu-berlin.de> ---
(In reply to Oleg Endo from comment #11)
> (In reply to John Paul Adrian Glaubitz from comment #10)
> >
> > Yes, definitely. Will take a little longer though as I need to fix my setup
> > first.
>
> Thanks in advance. Wait for your update.
OK, done. Bisect lead me to the following commit:
commit a7acb6dca941db2b1c135107dac3a34a20650d5c
Author: Vladimir N. Makarov <vmaka...@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.
gcc/ira-costs.c | 22 +---------------------
gcc/testsuite/gcc.target/i386/pr99531.c | 7 +++++++
2 files changed, 8 insertions(+), 21 deletions(-)
create mode 100644 gcc/testsuite/gcc.target/i386/pr99531.c
I have double-checked that this commit introduces the regression.
