Add a utility routine for detecting attribute 'Old. It will be
immediately reused in the GNATprove backend.
Tested on x86_64-pc-linux-gnu, committed on trunk
2019-09-17 Piotr Trojanek <troja...@adacore.com>
gcc/ada/
* sem_util.ads, sem_util.adb (Is_Attribute_Old): New utility
routine.--- gcc/ada/sem_util.adb
+++ gcc/ada/sem_util.adb
@@ -13559,6 +13559,16 @@ package body Sem_Util is
Is_Volatile_Full_Access (Etype (Entity (N)))));
end Is_Atomic_Or_VFA_Object;
+ ----------------------
+ -- Is_Attribute_Old --
+ ----------------------
+
+ function Is_Attribute_Old (N : Node_Id) return Boolean is
+ begin
+ return Nkind (N) = N_Attribute_Reference
+ and then Attribute_Name (N) = Name_Old;
+ end Is_Attribute_Old;
+
-------------------------
-- Is_Attribute_Result --
-------------------------
--- gcc/ada/sem_util.ads
+++ gcc/ada/sem_util.ads
@@ -1549,6 +1549,9 @@ package Sem_Util is
-- Determine whether arbitrary node N denotes a reference to an object
-- which is either atomic or Volatile_Full_Access.
+ function Is_Attribute_Old (N : Node_Id) return Boolean;
+ -- Determine whether node N denotes attribute 'Old
+
function Is_Attribute_Result (N : Node_Id) return Boolean;
-- Determine whether node N denotes attribute 'Result
