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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/102787] ICE in new test case
 gfortran.dg/reshape_shape_2.f90
Date: Wed, 20 Oct 2021 20:58:28 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102787

--- Comment #7 from anlauf at gcc dot gnu.org ---
Slightly improved version of the patch of comment#6:

diff --git a/gcc/fortran/array.c b/gcc/fortran/array.c
index 6552eaf3b0c..a63a6631f59 100644
--- a/gcc/fortran/array.c
+++ b/gcc/fortran/array.c
@@ -1812,6 +1812,29 @@ expand_constructor (gfc_constructor_base base)
          continue;
        }

+      /* Expand constant array within array constructor.  */
+      if (e->expr_type =3D=3D EXPR_VARIABLE && e->rank && e->ref
+         && e->symtree && e->symtree->n.sym
+         && e->symtree->n.sym->attr.flavor =3D=3D FL_PARAMETER
+         && e->symtree->n.sym->value
+         && e->symtree->n.sym->value->value.constructor)
+       {
+         gfc_array_ref *ar;
+         ar =3D gfc_find_array_ref (e);
+         if (ar && ar->as && ar->as->type =3D=3D AS_EXPLICIT)
+           {
+             if (ar->type =3D=3D AR_FULL)
+               {
+                 gfc_expr *value =3D e->symtree->n.sym->value;
+                 if (!expand_constructor (value->value.constructor))
+                   return false;
+
+                 continue;
+               }
+             /* TODO: handle ar->type =3D=3D AR_SECTION.  */
+           }
+       }
+
       empty_constructor =3D false;
       e =3D gfc_copy_expr (e);
       if (!gfc_simplify_expr (e, 1))

Still does not handle array sections.=