https://gcc.gnu.org/g:0b7c0811ced8c98b4bebd1bc89f2272216000900
commit r15-190-g0b7c0811ced8c98b4bebd1bc89f2272216000900
Author: Justin Squirek <squi...@adacore.com>
Date: Thu Dec 21 18:31:27 2023 +0000
ada: Spurious reference warning on qualified expression
This patch fixes an error in the compiler whereby an assignment to an out
formal (whose type requires a predicate check) can lead to spurious
"value may be referenced before it has a value" warnings when the RHS is a
qualified expression.
gcc/ada/
* sem_warn.adb (Within_Postcondition): Add case to ignore
references within generated predicate function calls.
Diff:
---
gcc/ada/sem_warn.adb | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/gcc/ada/sem_warn.adb b/gcc/ada/sem_warn.adb
index eaf9a257ba0..0a54b3eda50 100644
--- a/gcc/ada/sem_warn.adb
+++ b/gcc/ada/sem_warn.adb
@@ -1982,6 +1982,16 @@ package body Sem_Warn is
then
return True;
+ -- Verify we are not within a generated predicate
+ -- function call.
+
+ elsif Nkind (Nod) = N_Function_Call
+ and then Is_Entity_Name (Name (Nod))
+ and then Is_Predicate_Function
+ (Entity (Name (Nod)))
+ then
+ return True;
+
elsif Present (Parent (Nod)) then
P := Parent (Nod);
