https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117699
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed| |2024-11-20
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think the problem is in peep2_find_free_register:
/* Don't use registers set or clobbered by the insn. */
FOR_EACH_INSN_DEF (def, peep2_insn_data[from].insn)
SET_HARD_REG_BIT (live, DF_REF_REGNO (def));
This only sets the live info based on the regno here.
But it should be instead (with fixed formating):
```
/* Don't use registers set or clobbered by the insn. */
FOR_EACH_INSN_DEF (def, peep2_insn_data[from].insn)
add_to_hard_reg_set (&live, GET_MODE (DF_REF_REAL_REG (def)), DF_REF_REGNO
(def));
```
This is similar to what is done in compute_regs_asm_clobbered (ira.cc).
