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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug debug/103315] Gfortran DW_AT_Rank expression not emitting
 correct rank value.
Date: Thu, 18 Nov 2021 14:26:26 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103315

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Would DW_OP_deref_size 1 instead of DW_OP_deref fix this?  dtype.rank field=
 is
I think unsigned char.

I.e.:
2021-11-18  Jakub Jelinek  <jakub@redhat.com>

        PR debug/103315
        * trans-types.c (gfc_get_array_descr_info): Use DW_OP_deref_size 1
        instead of DW_OP_deref for DW_AT_rank.

--- gcc/fortran/trans-types.c.jj        2021-11-12 15:54:21.000000000 +0100
+++ gcc/fortran/trans-types.c   2021-11-18 15:13:45.131281198 +0100
@@ -3459,8 +3459,8 @@ gfc_get_array_descr_info (const_tree typ
       if (!integer_zerop (dtype_off))
        t =3D fold_build_pointer_plus (t, rank_off);

-      t =3D build1 (NOP_EXPR, build_pointer_type (gfc_array_index_type), t=
);
-      t =3D build1 (INDIRECT_REF, gfc_array_index_type, t);
+      t =3D build1 (NOP_EXPR, build_pointer_type (TREE_TYPE (field)), t);
+      t =3D build1 (INDIRECT_REF, TREE_TYPE (field), t);
       info->rank =3D t;
       t =3D build0 (PLACEHOLDER_EXPR, TREE_TYPE (dim_off));
       t =3D size_binop (MULT_EXPR, t, dim_size);=