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* [gcc r13-475] [Ada] Pick volatile refinement property of a subtype from its base type
@ 2022-05-16 8:42 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2022-05-16 8:42 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:4e8b88f36ce705d20dddc86f999539cc854ef401
commit r13-475-g4e8b88f36ce705d20dddc86f999539cc854ef401
Author: Piotr Trojanek <trojanek@adacore.com>
Date: Mon Mar 7 15:27:06 2022 +0100
[Ada] Pick volatile refinement property of a subtype from its base type
Volatile refinement properties (e.g. Async_Writers), which refine the
Volatile aspect in SPARK, are inherited by subtypes from their base
types. In particular, this patch fixes handling of those properties for
subtypes of private types.
gcc/ada/
* sem_util.adb (Type_Or_Variable_Has_Enabled_Property): Given a
subtype recurse into its base type.
Diff:
---
gcc/ada/sem_util.adb | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/gcc/ada/sem_util.adb b/gcc/ada/sem_util.adb
index 6cf3c70c8d9..b0cca0896e3 100644
--- a/gcc/ada/sem_util.adb
+++ b/gcc/ada/sem_util.adb
@@ -12683,7 +12683,8 @@ package body Sem_Util is
then
return False;
- -- For a private type, may need to look at the full view
+ -- For a private type (including subtype of a private types), look at
+ -- the full view.
elsif Is_Private_Type (Item_Id) and then Present (Full_View (Item_Id))
then
@@ -12696,6 +12697,13 @@ package body Sem_Util is
return Type_Or_Variable_Has_Enabled_Property
(First_Subtype (Etype (Base_Type (Item_Id))));
+ -- For a subtype, the property will be inherited from its base type.
+
+ elsif Is_Type (Item_Id)
+ and then not Is_Base_Type (Item_Id)
+ then
+ return Type_Or_Variable_Has_Enabled_Property (Etype (Item_Id));
+
-- If not specified explicitly for an object and its type
-- is effectively volatile, then take result from the type.
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