[Ada] Add a No_Return annotation to ease static analysis

2018-09-26  Hristian Kirtchev  <kirtchev@adacore.com>

gcc/ada/

	* sem_ch5.adb (Wrap_Loop_Statement): Annotate as No_Return.

From-SVN: r264627

gcc/ada/ChangeLog

+2018-09-26  Hristian Kirtchev  <kirtchev@adacore.com>
+
+	* sem_ch5.adb (Wrap_Loop_Statement): Annotate as No_Return.
+
 2018-09-26  Ed Schonberg  <schonberg@adacore.com>
 
 	* exp_util.adb (Make_Predicate_Call): Use OK_Convert_To when

gcc/ada/sem_ch5.adb

@@ -3429,7 +3429,8 @@ package body Sem_Ch5 is
          --  for transformation if needed.
 
          procedure Wrap_Loop_Statement (Manage_Sec_Stack : Boolean);
-         pragma Inline (Wrap_Loop_Statement);
+         pragma Inline    (Wrap_Loop_Statement);
+         pragma No_Return (Wrap_Loop_Statement);
          --  Wrap loop statement N within a block. Flag Manage_Sec_Stack must
          --  be set when the block must mark and release the secondary stack.