* gimple.h (gimple_expr_code): Do checking on when gimple checking is enabled.

From-SVN: r161207

gcc/ChangeLog

 2010-06-22  Jan Hubicka  <jh@suse.cz>
 
+	* gimple.h (gimple_expr_code): Do checking on when gimple checking is enabled.
+
+2010-06-22  Jan Hubicka  <jh@suse.cz>
+
 	* df-problems.c (df_rd_confluence_n, df_lr_confluence_n, df_live_confluence_n,
 	df_byte_lr_confluence_n, df_md_confluence_n): Return true if something changed.
 	* df.h (df_confluence_function_n): Return bool.

gcc/gimple.h

@@ -1464,10 +1464,11 @@ gimple_expr_code (const_gimple stmt)
   enum gimple_code code = gimple_code (stmt);
   if (code == GIMPLE_ASSIGN || code == GIMPLE_COND)
     return (enum tree_code) stmt->gsbase.subcode;
-  else if (code == GIMPLE_CALL)
-    return CALL_EXPR;
   else
-    gcc_unreachable ();
+    {
+      gcc_gimple_checking_assert (code == GIMPLE_CALL);
+      return CALL_EXPR;
+    }
 }