[COMMITTED] ada: Make the identification of case expressions more robust

[Marc Poulhiès via Gcc-patches]

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

gcc/ada/

        * gcc-interface/trans.cc (Case_Statement_to_gnu): Rename boolean
        constant and use From_Conditional_Expression flag for its value.

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

---
 gcc/ada/gcc-interface/trans.cc | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/gcc/ada/gcc-interface/trans.cc b/gcc/ada/gcc-interface/trans.cc
index ddc7b6dde1e..b74bb0683bf 100644
--- a/gcc/ada/gcc-interface/trans.cc
+++ b/gcc/ada/gcc-interface/trans.cc
@@ -2700,11 +2700,9 @@ Case_Statement_to_gnu (Node_Id gnat_node)
         never been problematic, but not for case expressions in Ada 2012.  */
       if (choices_added_p)
        {
-         const bool is_case_expression
-           = (Nkind (Parent (gnat_node)) == N_Expression_With_Actions);
-         tree group
-           = build_stmt_group (Statements (gnat_when), !is_case_expression);
-         bool group_may_fallthru = block_may_fallthru (group);
+         const bool case_expr_p = From_Conditional_Expression (gnat_node);
+         tree group = build_stmt_group (Statements (gnat_when), !case_expr_p);
+         const bool group_may_fallthru = block_may_fallthru (group);
          add_stmt (group);
          if (group_may_fallthru)
            {
-- 
2.40.0