[Bug debug/105203] [11 Regression] '-fcompare-debug' failure w/ -O2 -ftracer -fPIC since r11-3078-g69ca5f3a988266da

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105203

--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:141b66c4becfa2f2c09b4a6cc0411d995ea5153a

commit r11-9897-g141b66c4becfa2f2c09b4a6cc0411d995ea5153a
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu Apr 21 09:43:30 2022 +0200

    emit-rtl: Fix -fcompare-debug bug with label references in debug insns
[PR105203]

    When we compute LABEL_NUSES from scratch, mark_all_labels doesn't call
    mark_jump_label on DEBUG_INSNs:
                  if (NONDEBUG_INSN_P (insn))
                    mark_jump_label (PATTERN (insn), insn, 0);
    and so doesn't increment LABEL_NUSES from references in DEBUG_INSNs.
    But, when we call emit_copy_of_insn_after e.g. when duplicating some
    DEBUG_INSNs, we call it even on those, which then results in LABEL_NUSES
    differences and -fcompare-debug failures.

    The following patch makes sure we don't call it on DEBUG_INSNs.

    2022-04-21  Jakub Jelinek  <jakub@redhat.com>

            PR debug/105203
            * emit-rtl.c (emit_copy_of_insn_after): Don't call mark_jump_label
            on DEBUG_INSNs.

            * gfortran.dg/g77/pr105203.f: New test.

    (cherry picked from commit 504b02c70abcc31e0e9b56e69f82f85b5261bca9)