* [Ada] Unique itypes names for unconstrained array object declaration
@ 2020-10-16 7:35 Pierre-Marie de Rodat
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From: Pierre-Marie de Rodat @ 2020-10-16 7:35 UTC (permalink / raw)
To: gcc-patches; +Cc: Piotr Trojanek
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An unconstrained array object declaration might require two itypes: for
object definition and for its initial value. Their names do not matter
for the frontend, but GNATprove requires all types to have unique names
(except private/full views).
Tested on x86_64-pc-linux-gnu, committed on trunk
gcc/ada/
* sem_ch3.adb (Array_Type_Declaration): Create itype with unique
name.
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diff --git a/gcc/ada/sem_ch3.adb b/gcc/ada/sem_ch3.adb
--- a/gcc/ada/sem_ch3.adb
+++ b/gcc/ada/sem_ch3.adb
@@ -6141,7 +6141,12 @@ package body Sem_Ch3 is
-- Constrained array case
if No (T) then
- T := Create_Itype (E_Void, P, Related_Id, 'T');
+ -- We might be creating more than one itype with the same Related_Id,
+ -- e.g. for an array object definition and its initial value. Give
+ -- them unique suffixes, because GNATprove require distinct types to
+ -- have different names.
+
+ T := Create_Itype (E_Void, P, Related_Id, 'T', Suffix_Index => -1);
end if;
if Nkind (Def) = N_Constrained_Array_Definition then
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2020-10-16 7:35 [Ada] Unique itypes names for unconstrained array object declaration Pierre-Marie de Rodat
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