[COMMITTED 03/22] ada: Fix assertion failure on predicate involving access parameter

[Marc Poulhiès]

From: Eric Botcazou <ebotca...@adacore.com>

The assertion fails because the Original_Node of the expression has no Etype
since its an unanalyzed identifier.

gcc/ada/

        * accessibility.adb (Accessibility_Level): Apply the processing to
        Expr when its Original_Node is an unanalyzed identifier.

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

---
 gcc/ada/accessibility.adb | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/gcc/ada/accessibility.adb b/gcc/ada/accessibility.adb
index da4d1d9ce2e..298103377a7 100644
--- a/gcc/ada/accessibility.adb
+++ b/gcc/ada/accessibility.adb
@@ -398,7 +398,7 @@ package body Accessibility is
 
       --  Local variables
 
-      E   : Node_Id := Original_Node (Expr);
+      E   : Node_Id;
       Pre : Node_Id;
 
    --  Start of processing for Accessibility_Level
@@ -409,6 +409,17 @@ package body Accessibility is
 
       if Present (Param_Entity (Expr)) then
          E := Param_Entity (Expr);
+
+      --  Use the original node unless it is an unanalyzed identifier, as we
+      --  don't want to reason on unanalyzed expressions from predicates.
+
+      elsif Nkind (Original_Node (Expr)) /= N_Identifier
+        or else Analyzed (Original_Node (Expr))
+      then
+         E := Original_Node (Expr);
+
+      else
+         E := Expr;
       end if;
 
       --  Extract the entity
-- 
2.45.1