[Bug tree-optimization/77498] [7 regression] Performance drop after r239414 on spec2000/172mgrid

[avieira at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77498

avieira at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |arm-none-eabi
                 CC|                            |avieira at gcc dot gnu.org

--- Comment #2 from avieira at gcc dot gnu.org ---
I am observing some regressions for arm-none-eabi on a Cortex-M0+ for a popular
embedded benchmark following this patch.

I believe register pressure might also be the root cause of this given the
significant increase of loads and registers from and to the stack. Though I
need to have a better look.

Passing the option -fno-code-hoisting brings the performance numbers back up.