[COMMITED] ada: Reject conditional goto in lock-free protected subprograms

[COMMITED] ada: Reject conditional goto in lock-free protected subprograms

[Marc Poulhiès]

From: Piotr Trojanek <trojanek@adacore.com>

In lock-free protected subprograms we don't allow goto statements;
likewise, we now reject conditional goto statements.

This fix only affects semantic checking mode with switch -gnatc.
In ordinary compilation we already rejected conditional goto after
it was expanded into ordinary goto.

gcc/ada/

	* sem_ch9.adb (Allows_Lock_Free_Implementation): Reject
	conditional goto statements.

Tested on x86_64-pc-linux-gnu, committed on master.

---
 gcc/ada/sem_ch9.adb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/ada/sem_ch9.adb b/gcc/ada/sem_ch9.adb
index 6506358a02b..f2a59017865 100644
--- a/gcc/ada/sem_ch9.adb
+++ b/gcc/ada/sem_ch9.adb
@@ -453,7 +453,7 @@ package body Sem_Ch9 is
 
                   --  Goto statements restricted
 
-                  elsif Kind = N_Goto_Statement then
+                  elsif Kind in N_Goto_Statement | N_Goto_When_Statement then
                      if Lock_Free_Given then
                         Error_Msg_N ("goto statement not allowed", N);
                         return Skip;
-- 
2.34.1