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* [gcc r12-1500] [Ada] ACATS 4.1R-c611a04: Class-wide preconditions in dispatching calls
@ 2021-06-16 8:44 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2021-06-16 8:44 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:cbb64f6b9ac870176700a2fa723a3b21a53b9b29
commit r12-1500-gcbb64f6b9ac870176700a2fa723a3b21a53b9b29
Author: Javier Miranda <miranda@adacore.com>
Date: Thu Feb 18 13:47:10 2021 -0500
[Ada] ACATS 4.1R-c611a04: Class-wide preconditions in dispatching calls
gcc/ada/
* exp_disp.adb (Build_Class_Wide_Check): Ensure that evaluation
of actuals is side effects free (since the check duplicates
actuals).
Diff:
---
gcc/ada/exp_disp.adb | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/gcc/ada/exp_disp.adb b/gcc/ada/exp_disp.adb
index 20a32cd9576..eb6b352bef9 100644
--- a/gcc/ada/exp_disp.adb
+++ b/gcc/ada/exp_disp.adb
@@ -868,6 +868,7 @@ package body Exp_Disp is
Str_Loc : constant String := Build_Location_String (Loc);
+ A : Node_Id;
Cond : Node_Id;
Msg : Node_Id;
Prec : Node_Id;
@@ -900,6 +901,15 @@ package body Exp_Disp is
return;
end if;
+ -- Ensure that the evaluation of the actuals will not produce side
+ -- effects (since the check will use a copy of the actuals).
+
+ A := First_Actual (Call_Node);
+ while Present (A) loop
+ Remove_Side_Effects (A);
+ Next_Actual (A);
+ end loop;
+
-- The expression for the precondition is analyzed within the
-- generated pragma. The message text is the last parameter of
-- the generated pragma, indicating source of precondition.
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