https://gcc.gnu.org/g:da377160f648ff09f8df1a5200d14106bf62b2d1
commit r16-1228-gda377160f648ff09f8df1a5200d14106bf62b2d1
Author: Piotr Trojanek <troja...@adacore.com>
Date: Tue Feb 25 12:48:32 2025 +0100
ada: Document representation clauses previously required by ASIS
A record type used for name identifiers had representation clause to make
sure
that table with identifiers is written to an ASIS file without holes. Now
ASIS
mode has been deconstructed, but we still want this representation clause to
ensure efficient implementation.
Comment update; behavior is unaffected.
gcc/ada/ChangeLog:
* namet.ads (Name_Entry): Update comments to explain the current
needs.
Diff:
---
gcc/ada/namet.ads | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/gcc/ada/namet.ads b/gcc/ada/namet.ads
index daa87d91caa6..7182fb87e7ec 100644
--- a/gcc/ada/namet.ads
+++ b/gcc/ada/namet.ads
@@ -609,6 +609,7 @@ private
-- Int Value associated with this name
end record;
+ -- The aliased non-boolean components are required to match the C structure
for Name_Entry use record
Name_Chars_Index at 0 range 0 .. 31;
@@ -622,9 +623,10 @@ private
Hash_Link at 8 range 0 .. 31;
Int_Info at 12 range 0 .. 31;
end record;
+ -- This ensures a matching layout between Ada and C
for Name_Entry'Size use 16 * 8;
- -- This ensures that we did not leave out any fields
+ -- This ensures that record is reasonably small
-- This is the table that is referenced by Valid_Name_Id entries.
-- It contains one entry for each unique name in the table.
