Fix PR debug/113519 and debug/113777

[Eric Botcazou]

They both come from an oversight of mine in the placement of the DIE created 
for an enumeration type with reverse scalar storage order.

Tested on x86-64/Linux, both GCC and GDB, applied on mainline as obvious.


2024-03-11  Eric Botcazou  <ebotca...@adacore.com>

        PR debug/113519
        PR debug/113777
        * dwarf2out.cc (gen_enumeration_type_die): In the reverse case,
        generate the DIE with the same parent as in the regular case.


2024-03-11  Eric Botcazou  <ebotca...@adacore.com>

        * gcc.dg/sso-20.c: New test.
        * gcc.dg/sso-21.c: Likewise.

-- 
Eric Botcazou
diff --git a/gcc/dwarf2out.cc b/gcc/dwarf2out.cc
index 03d73f9eecd..9b1548e4ae3 100644
--- a/gcc/dwarf2out.cc
+++ b/gcc/dwarf2out.cc
@@ -22868,18 +22868,19 @@ gen_enumeration_type_die (tree type, dw_die_ref context_die, bool reverse)
 
   if (type_die == NULL || reverse)
     {
+      dw_die_ref scope_die = scope_die_for (type, context_die);
+
       /* The DIE with DW_AT_endianity is placed right after the naked DIE.  */
       if (reverse)
 	{
 	  gcc_assert (type_die);
 	  dw_die_ref after_die = type_die;
 	  type_die = new_die_raw (DW_TAG_enumeration_type);
-	  add_child_die_after (context_die, type_die, after_die);
+	  add_child_die_after (scope_die, type_die, after_die);
 	}
       else
 	{
-	  type_die = new_die (DW_TAG_enumeration_type,
-			      scope_die_for (type, context_die), type);
+	  type_die = new_die (DW_TAG_enumeration_type, scope_die, type);
 	  equate_type_number_to_die (type, type_die);
 	}
       add_name_attribute (type_die, type_tag (type));

/* PR debug/113519 */
/* Reported by Zdenek Sojka <zso...@seznam.cz> */

/* { dg-do compile } */
/* { dg-options "-g -fdebug-types-section" } */

enum E { X };

#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
struct __attribute__((scalar_storage_order("big-endian")))
{
  enum E e;
} S;
#else
struct __attribute__((scalar_storage_order("little-endian")))
{
  enum E e;
} S;
#endif

/* PR debug/113777 */
/* Reported by Zdenek Sojka <zso...@seznam.cz> */

/* { dg-do compile } */
/* { dg-options "-g" } */

typedef short __attribute__((__hardbool__)) hbool;

#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
struct __attribute__((scalar_storage_order("big-endian")))
{
  hbool a[2];
} S;
#else
struct __attribute__((scalar_storage_order("little-endian")))
{
  hbool a[2];
} S;
#endif