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[Ada] A new utility routine for detecting attribute 'Old

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Add a utility routine for detecting attribute 'Old. It will be
immediately reused in the GNATprove backend.

2019-09-17  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

	* sem_util.ads, sem_util.adb (Is_Attribute_Old): New utility
	routine.

From-SVN: r275780
This commit is contained in:
Piotr Trojanek 2019-09-17 08:01:23 +00:00 committed by Pierre-Marie de Rodat
parent cbb0b55385
commit ee7c961db9
3 changed files with 18 additions and 0 deletions
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5
gcc/ada/ChangeLog
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@ -1,3 +1,8 @@
2019-09-17 Piotr Trojanek <trojanek@adacore.com>
* sem_util.ads, sem_util.adb (Is_Attribute_Old): New utility
routine.
2019-09-17 Yannick Moy <moy@adacore.com>
* inline.adb (Can_Be_Inlined_In_GNATprove_Mode): Add handling

10
gcc/ada/sem_util.adb
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@ -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 --
-------------------------

3
gcc/ada/sem_util.ads
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@ -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