[gcc r13-4964] ada: Another small adjustment to special resolution of membership test

[Marc Poulhi?s <dkm@gcc.gnu.org>]

https://gcc.gnu.org/g:48d9f7cb215f1af996788aee07808339a786a18d

commit r13-4964-g48d9f7cb215f1af996788aee07808339a786a18d
Author: Eric Botcazou <ebotcazou@adacore.com>
Date:   Wed Dec 7 17:54:37 2022 +0100

    ada: Another small adjustment to special resolution of membership test
    
    This goes back to the original implementation but keeps the special size
    test with universal_integer to cope with its limited range.
    
    gcc/ada/
    
            * sem_res.adb (Resolve_Membership_Op): Adjust again latest change.

Diff:
---
 gcc/ada/sem_res.adb | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/gcc/ada/sem_res.adb b/gcc/ada/sem_res.adb
index b54ed93a7f7..348d272a399 100644
--- a/gcc/ada/sem_res.adb
+++ b/gcc/ada/sem_res.adb
@@ -10105,11 +10105,11 @@ package body Sem_Res is
       then
          T := Etype (R);
 
-      --  If the type of the left operand is universal_integer and that of the
-      --  right operand is smaller, then we do not resolve the operands to the
-      --  tested type but to universal_integer instead. If not conforming to
-      --  the letter, it's conforming to the spirit of the specification of
-      --  membership tests, which are typically used to guard an operation and
+      --  If the left operand is of a universal numeric type and the right
+      --  operand is not, we do not resolve the operands to the tested type
+      --  but to the universal type instead. If not conforming to the letter,
+      --  it's conforming to the spirit of the specification of membership
+      --  tests, which are typically used to guard a specific operation and
       --  ought not to fail a check in doing so. Without this, in the case of
 
       --    type Small_Length is range 1 .. 16;
@@ -10127,9 +10127,14 @@ package body Sem_Res is
       --  for example the large values of Long_Long_Long_Unsigned.
 
       elsif not Is_Overloaded (L)
-        and then Etype (L) = Universal_Integer
+        and then Is_Universal_Numeric_Type (Etype (L))
         and then (Is_Overloaded (R)
-                   or else RM_Size (Etype (R)) < RM_Size (Universal_Integer))
+                   or else
+                     (not Is_Universal_Numeric_Type (Etype (R))
+                       and then
+                         (not Is_Integer_Type (Etype (R))
+                           or else
+                          RM_Size (Etype (R)) < RM_Size (Universal_Integer))))
       then
          T := Etype (L);