@@ -7429,6 +7429,19 @@ package body Checks is
return;
end if;
+ -- Entities declared in Lock_free protected types must be treated
+ -- as volatile, and we must inhibit validity checks to prevent
+ -- improper constant folding.
+
+ if Is_Entity_Name (Expr)
+ and then Is_Subprogram (Scope (Entity (Expr)))
+ and then Present (Protected_Subprogram (Scope (Entity (Expr))))
+ and then Uses_Lock_Free
+ (Scope (Protected_Subprogram (Scope (Entity (Expr)))))
+ then
+ return;
+ end if;
+
-- If we have a checked conversion, then validity check applies to
-- the expression inside the conversion, not the result, since if
-- the expression inside is valid, then so is the conversion result.
new file mode 100644
@@ -0,0 +1,22 @@
+-- { dg-do compile }
+-- { dg-options "-gnatwa -gnatVa" }
+
+package body Prot7 is
+ protected body Default_Slice is
+ function Get return Instance_Pointer is
+ begin
+ return Default;
+ end Get;
+
+ procedure Set (
+ Discard : in out Boolean;
+ Slice : in Instance_Pointer
+ ) is
+ begin
+ Discard := Default /= null;
+ if not Discard then
+ Default := Slice;
+ end if;
+ end Set;
+ end Default_Slice;
+end Prot7;
new file mode 100644
@@ -0,0 +1,16 @@
+package Prot7 is
+ type Instance_Pointer is access Integer;
+
+ protected Default_Slice
+ with Lock_Free
+ is
+ function Get return Instance_Pointer;
+
+ procedure Set (
+ Discard : in out Boolean;
+ Slice : in Instance_Pointer
+ );
+ private
+ Default : Instance_Pointer;
+ end Default_Slice;
+end Prot7;