[gcc r13-532] [Ada] Don't create calls to Abort_Undefer when not Abort_Allowed

[gcc r13-532] [Ada] Don't create calls to Abort_Undefer when not Abort_Allowed

[Pierre-Marie de Rodat]

https://gcc.gnu.org/g:6e2d6b8e8ead146f6d7e314c9d6763bbefc7459b

commit r13-532-g6e2d6b8e8ead146f6d7e314c9d6763bbefc7459b
Author: Ghjuvan Lacambre <lacambre@adacore.com>
Date:   Tue Mar 15 10:57:45 2022 +0100

    [Ada] Don't create calls to Abort_Undefer when not Abort_Allowed
    
    Prevent creation of references to Abort_Undefer when aborts aren't
    allowed. Another solution could have been an early return at
    Expand_N_Asynchronous_Select's beginning, but this would break backends
    that currently expect trees that do not contain any
    N_Asynchronous_Selects in their AST (e.g. CodePeer).
    
    gcc/ada/
    
            * exp_ch9.adb (Expand_N_Asynchronous_Select): Don't generate
            Abort_Undefers when not Abort_Allowed.

Diff:
---
 gcc/ada/exp_ch9.adb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gcc/ada/exp_ch9.adb b/gcc/ada/exp_ch9.adb
index f7067805979..0e551ab868c 100644
--- a/gcc/ada/exp_ch9.adb
+++ b/gcc/ada/exp_ch9.adb
@@ -7812,7 +7812,9 @@ package body Exp_Ch9 is
 
          Hdle := New_List (Build_Abort_Block_Handler (Loc));
 
-         Prepend_To (Astats, Build_Runtime_Call (Loc, RE_Abort_Undefer));
+         if Abort_Allowed then
+            Prepend_To (Astats, Build_Runtime_Call (Loc, RE_Abort_Undefer));
+         end if;
 
          Abortable_Block :=
            Make_Block_Statement (Loc,