[gcc r13-1673] [Ada] Fix internal error on comparison with access function parameter

[gcc r13-1673] [Ada] Fix internal error on comparison with access function parameter

[Pierre-Marie de Rodat]

https://gcc.gnu.org/g:d927cb527cb17547b24d2b52ddd29e8fad621a66

commit r13-1673-gd927cb527cb17547b24d2b52ddd29e8fad621a66
Author: Eric Botcazou <ebotcazou@adacore.com>
Date:   Wed Jun 22 20:20:06 2022 +0200

    [Ada] Fix internal error on comparison with access function parameter
    
    It comes from an overzealous assertion.
    
    gcc/ada/
    
            * gcc-interface/utils2.cc (build_binary_op) <EQ_EXPR>: Also accept
            pointer-to-function types that are not variant of each other.

Diff:
---
 gcc/ada/gcc-interface/utils2.cc | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/gcc/ada/gcc-interface/utils2.cc b/gcc/ada/gcc-interface/utils2.cc
index 0dcc9fff2a0..4dfe29dc7d9 100644
--- a/gcc/ada/gcc-interface/utils2.cc
+++ b/gcc/ada/gcc-interface/utils2.cc
@@ -1134,12 +1134,17 @@ build_binary_op (enum tree_code op_code, tree result_type,
 	  else if (POINTER_TYPE_P (left_base_type)
 		   && POINTER_TYPE_P (right_base_type))
 	    {
+	      tree left_ref_type = TREE_TYPE (left_base_type);
+	      tree right_ref_type = TREE_TYPE (right_base_type);
+
 	      /* Anonymous access types in Ada 2005 can point to different
-		 members of a tagged type hierarchy.  */
-	      gcc_assert (TYPE_MAIN_VARIANT (TREE_TYPE (left_base_type))
-			  == TYPE_MAIN_VARIANT (TREE_TYPE (right_base_type))
-			  || (TYPE_ALIGN_OK (TREE_TYPE (left_base_type))
-			      && TYPE_ALIGN_OK (TREE_TYPE (right_base_type))));
+		 members of a tagged hierarchy or different function types.  */
+	      gcc_assert (TYPE_MAIN_VARIANT (left_ref_type)
+			  == TYPE_MAIN_VARIANT (right_ref_type)
+			  || (TYPE_ALIGN_OK (left_ref_type)
+			      && TYPE_ALIGN_OK (right_ref_type))
+			  || (TREE_CODE (left_ref_type) == FUNCTION_TYPE
+			      && TREE_CODE (right_ref_type) == FUNCTION_TYPE));
 	      best_type = left_base_type;
 	    }