* [Ada] Cleanup repeated code for aggregate constraints checks
@ 2022-07-05 8:29 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2022-07-05 8:29 UTC (permalink / raw)
To: gcc-patches; +Cc: Piotr Trojanek
[-- Attachment #1: Type: text/plain, Size: 380 bytes --]
Code cleanup related to examining uses of Check_Unset_Reference for
improved detection of uninitialised scalar objects. Semantics is
unaffected.
Tested on x86_64-pc-linux-gnu, committed on trunk
gcc/ada/
* sem_util.adb (Aggregate_Constraint_Checks): Fix whitespace;
refactor repeated code; replace a ??? comment with an
explanation based on the comment for the routine spec.
[-- Attachment #2: patch.diff --]
[-- Type: text/x-diff, Size: 2030 bytes --]
diff --git a/gcc/ada/sem_util.adb b/gcc/ada/sem_util.adb
--- a/gcc/ada/sem_util.adb
+++ b/gcc/ada/sem_util.adb
@@ -1153,7 +1153,7 @@ package body Sem_Util is
(Exp : Node_Id;
Check_Typ : Entity_Id)
is
- Exp_Typ : constant Entity_Id := Etype (Exp);
+ Exp_Typ : constant Entity_Id := Etype (Exp);
begin
if Raises_Constraint_Error (Exp) then
@@ -1236,12 +1236,12 @@ package body Sem_Util is
and then Is_Scalar_Type (Check_Typ)
and then Exp_Typ /= Check_Typ
then
+ -- If expression is a constant, it is worthwhile checking whether it
+ -- is a bound of the type.
+
if Is_Entity_Name (Exp)
and then Ekind (Entity (Exp)) = E_Constant
then
- -- If expression is a constant, it is worthwhile checking whether
- -- it is a bound of the type.
-
if (Is_Entity_Name (Type_Low_Bound (Check_Typ))
and then Entity (Exp) = Entity (Type_Low_Bound (Check_Typ)))
or else
@@ -1249,20 +1249,15 @@ package body Sem_Util is
and then Entity (Exp) = Entity (Type_High_Bound (Check_Typ)))
then
return;
-
- else
- Rewrite (Exp, Convert_To (Check_Typ, Relocate_Node (Exp)));
- Analyze_And_Resolve (Exp, Check_Typ);
- Check_Unset_Reference (Exp);
end if;
+ end if;
- -- Could use a comment on this case ???
+ -- Change Exp into Check_Typ'(Exp) to ensure that range checks are
+ -- performed at run time.
- else
- Rewrite (Exp, Convert_To (Check_Typ, Relocate_Node (Exp)));
- Analyze_And_Resolve (Exp, Check_Typ);
- Check_Unset_Reference (Exp);
- end if;
+ Rewrite (Exp, Convert_To (Check_Typ, Relocate_Node (Exp)));
+ Analyze_And_Resolve (Exp, Check_Typ);
+ Check_Unset_Reference (Exp);
end if;
end Aggregate_Constraint_Checks;
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