[gcc r12-5037] [Ada] Crash on expansion of tagged membership test

[gcc r12-5037] [Ada] Crash on expansion of tagged membership test

[Pierre-Marie de Rodat]

https://gcc.gnu.org/g:686b427ff408de245a84ec90640fcf36011be5ab

commit r12-5037-g686b427ff408de245a84ec90640fcf36011be5ab
Author: Justin Squirek <squirek@adacore.com>
Date:   Fri Oct 29 16:40:17 2021 -0400

    [Ada] Crash on expansion of tagged membership test
    
    gcc/ada/
    
            * exp_ch4.adb (Tagged_Membership): Use corresponding record type
            when expanding a tagged membership test on protected types.

Diff:
---
 gcc/ada/exp_ch4.adb | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/gcc/ada/exp_ch4.adb b/gcc/ada/exp_ch4.adb
index 3db43dd870a..f3923e914d7 100644
--- a/gcc/ada/exp_ch4.adb
+++ b/gcc/ada/exp_ch4.adb
@@ -15346,6 +15346,17 @@ package body Exp_Ch4 is
    begin
       SCIL_Node := Empty;
 
+      --  We have to examine the corresponding record type when dealing with
+      --  protected types instead of the original, unexpanded, type.
+
+      if Ekind (Right_Type) = E_Protected_Type then
+         Right_Type := Corresponding_Record_Type (Right_Type);
+      end if;
+
+      if Ekind (Left_Type) = E_Protected_Type then
+         Left_Type := Corresponding_Record_Type (Left_Type);
+      end if;
+
       --  In the case where the type is an access type, the test is applied
       --  using the designated types (needed in Ada 2012 for implicit anonymous
       --  access conversions, for AI05-0149).