https://gcc.gnu.org/g:b56a782224d90205710311a3623769a5d8befe28
commit r16-1132-gb56a782224d90205710311a3623769a5d8befe28
Author: squirek <squi...@adacore.com>
Date: Tue Jan 14 06:40:08 2025 +0000
ada: Spurious accessibility error with -gnatc
The patch fixes an issue in the compiler whereby a spurious accessibility
error gets generated in semantic checking mode (-gnatc) when an explicitly
aliased formal gets used as an actual for an access disriminant in a return
object.
gcc/ada/ChangeLog:
* accessibility.adb
(Check_Return_Construct_Accessibility): Disable check generation
when we are only checking semantics.
Diff:
---
gcc/ada/accessibility.adb | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/gcc/ada/accessibility.adb b/gcc/ada/accessibility.adb
index 8c85173aa34c..200f892a96f0 100644
--- a/gcc/ada/accessibility.adb
+++ b/gcc/ada/accessibility.adb
@@ -1642,6 +1642,13 @@ package body Accessibility is
(No (Extra_Accessibility_Of_Result (Scope_Id))
and then Is_Formal_Of_Current_Function (Assoc_Expr)
and then Is_Tagged_Type (Etype (Scope_Id)))
+
+ -- Disable the check generation when we are only checking semantics
+ -- since required locals do not get generated (e.g. extra
+ -- accessibility of result), and constant folding can occur and
+ -- lead to spurious errors.
+
+ and then Operating_Mode /= Check_Semantics
then
-- Generate a dynamic check based on the extra accessibility of
-- the result or the scope of the current function.
