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* [gcc/devel/ranger] [Ada] Fix premature freezing of artificial array subtype
@ 2020-06-17 22:52 Aldy Hernandez
0 siblings, 0 replies; only message in thread
From: Aldy Hernandez @ 2020-06-17 22:52 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:7e7cb6eee494e3ec59ae1faf679fe2c3a578a95e
commit 7e7cb6eee494e3ec59ae1faf679fe2c3a578a95e
Author: Eric Botcazou <ebotcazou@adacore.com>
Date: Tue Apr 7 09:39:06 2020 +0200
[Ada] Fix premature freezing of artificial array subtype
2020-06-16 Eric Botcazou <ebotcazou@adacore.com>
gcc/ada/
* freeze.adb (Freeze_Expression): Stop climbing the parent chain
at a N_{Case,If}_Expression node for a type or an entity that
does not come from source.
Diff:
---
gcc/ada/freeze.adb | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)
diff --git a/gcc/ada/freeze.adb b/gcc/ada/freeze.adb
index 8723af33edf..47a063ae043 100644
--- a/gcc/ada/freeze.adb
+++ b/gcc/ada/freeze.adb
@@ -7630,15 +7630,18 @@ package body Freeze is
exit;
end if;
- -- Note: N_Loop_Statement is a special case. A type that
- -- appears in the source can never be frozen in a loop (this
- -- occurs only because of a loop expanded by the expander), so
- -- we keep on going. Otherwise we terminate the search. Same
- -- is true of any entity which comes from source. (if they
- -- have predefined type, that type does not appear to come
- -- from source, but the entity should not be frozen here).
-
- when N_Loop_Statement =>
+ -- N_Loop_Statement is a special case: a type that appears in
+ -- the source can never be frozen in a loop (this occurs only
+ -- because of a loop expanded by the expander), so we keep on
+ -- going. Otherwise we terminate the search. Same is true of
+ -- any entity which comes from source (if it has a predefined
+ -- type, this type does not appear to come from source, but the
+ -- entity should not be frozen here). The reasoning can also be
+ -- applied to if-expressions and case-expressions.
+
+ when N_Loop_Statement
+ | N_If_Expression
+ | N_Case_Expression =>
exit when not Comes_From_Source (Etype (N))
and then (No (Nam) or else not Comes_From_Source (Nam));
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