[gcc r13-3799] ada: Compile-time simplification of 'Image incorrectly ignores Put_Image

[gcc r13-3799] ada: Compile-time simplification of 'Image incorrectly ignores Put_Image

[Marc Poulhi?s]

https://gcc.gnu.org/g:10f193eb043e30741d9631999bc869d71d43264c

commit r13-3799-g10f193eb043e30741d9631999bc869d71d43264c
Author: Steve Baird <baird@adacore.com>
Date:   Tue Oct 25 16:59:29 2022 -0700

    ada: Compile-time simplification of 'Image incorrectly ignores Put_Image
    
    In the case of Some_Enumeration_Type'Image (<some static value>),
    the compiler will replace this expression in its internal program
    representation with a corresponding string literal. This is incorrect
    if the Put_Image aspect has been specified (directly or via inheritance)
    for the enumeration type.
    
    gcc/ada/
    
            * sem_attr.adb
            (Eval_Attribute): Don't simplify 'Image call if Put_Image has been
            specified.

Diff:
---
 gcc/ada/sem_attr.adb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gcc/ada/sem_attr.adb b/gcc/ada/sem_attr.adb
index de4e8aa681c..5166b4be4e9 100644
--- a/gcc/ada/sem_attr.adb
+++ b/gcc/ada/sem_attr.adb
@@ -9203,13 +9203,15 @@ package body Sem_Attr is
       --  Image is a scalar attribute, but is never static, because it is
       --  not a static function (having a non-scalar argument (RM 4.9(22))
       --  However, we can constant-fold the image of an enumeration literal
-      --  if names are available.
+      --  if names are available and default Image implementation has not
+      --  been overridden.
 
       when Attribute_Image =>
          if Is_Entity_Name (E1)
            and then Ekind (Entity (E1)) = E_Enumeration_Literal
            and then not Discard_Names (First_Subtype (Etype (E1)))
            and then not Global_Discard_Names
+           and then not Has_Aspect (Etype (E1), Aspect_Put_Image)
          then
             declare
                Lit : constant Entity_Id := Entity (E1);