[Bug rtl-optimization/117248] gcc/libgcc/libgcc2.h:232:25: internal compiler error: Arithmetic exception

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117248

--- Comment #15 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Vladimir Makarov <vmakarov@gcc.gnu.org>:

https://gcc.gnu.org/g:75e7d1600f47859df40b2ac0feff5a71e0dbb040

commit r15-5997-g75e7d1600f47859df40b2ac0feff5a71e0dbb040
Author: Vladimir N. Makarov <vmakarov@redhat.com>
Date:   Fri Dec 6 16:16:28 2024 -0500

    [PR117248][LRA]: Rewriting reg notes update and fix calculation of conflict
hard regs of pseudo.

      LRA updates conflict hard regs of pseudo when some hard reg dies.  A
    complicated PA div/mod insns reference for clobbered explicit hard regs and
    hard reg as operands.  It prevents some hard reg dying although they
    still conflict with pseudos living through.  Although on such insns LRA
    updates wrongly reg notes (REG_DEAD, REG_UNUSED) which are used later in
    rematerialization subpass.  The patch fixes the problems.

    gcc/ChangeLog:

            PR rtl-optimization/117248
            * lra-lives.cc (start_living, start_dying): Remove.
            (insn_regnos, out_insn_regnos, insn_regnos_live_after): New.
            (sparseset_contains_pseudos_p): Remove.
            (make_hard_regno_live, make_hard_regno_dead): Return true if
            something in liveness is changed.
            (mark_pseudo_live,  mark_pseudo_dead): Ditto.
            (mark_regno_live, mark_regno_dead): Ditto.
            (clear_sparseset_regnos, regnos_in_sparseset_p): Use set instead
            of dead_set.
            (process_bb_lives): Rewrite dealing with reg notes.  Update
            conflict hard regs even when clobber hard reg is not marked as
            dead.
            (lra_create_live_ranges_1): Add initialization/finalization of
            insn_regnos, out_insn_regnos, insn_regnos_live_after.