gigi.h (create_var_decl): Adjust prototype.

	* gcc-interface/gigi.h (create_var_decl): Adjust prototype.
	(create_subprog_decl): Likewise.
	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Variable>: Rename
	static_p into static_flag and add volatile_flag local variable.
	Do not locally change the type of a volatile object, except for the
	pointed-to type if the object is handled by reference.  Adjust calls
	to create_var_decl.
	<E_Subprogram_Type>: Likewise for const and noreturn subprograms.
	(get_minimal_subprog_decl): Adjust call to create_subprog_decl.
	(elaborate_expression_1): Adjust call to create_var_decl.
	(gnat_to_gnu_field): Minor tweak.
	* gcc-interface/trans.c (gigi): Adjust calls to create_var_decl and
	create_subprog_decl.
	(build_raise_check): Likewise.
	(Subprogram_Body_to_gnu): Likewise.
	(create_temporary): Likewise.
	(Handled_Sequence_Of_Statements_to_gnu): Likewise.
	(Exception_Handler_to_gnu_gcc): Likewise.
	(Compilation_Unit_to_gnu): Likewise.
	(gnat_to_gnu): Likewise.
	* gcc-interface/utils.c (maybe_pad_type): Likewise.
	(create_var_decl): Add VOLATILE_FLAG parameter and handle it.
	(create_subprog_decl): Add CONST_FLAG and VOLATILE_FLAG parameters and
	handle them.

From-SVN: r231065

gcc/ada/ChangeLog

 2015-11-30  Eric Botcazou  <ebotcazou@adacore.com>
 
+	* gcc-interface/gigi.h (create_var_decl): Adjust prototype.
+	(create_subprog_decl): Likewise.
+	* gcc-interface/decl.c (gnat_to_gnu_entity) <E_Variable>: Rename
+	static_p into static_flag and add volatile_flag local variable.
+	Do not locally change the type of a volatile object, except for the
+	pointed-to type if the object is handled by reference.  Adjust calls
+	to create_var_decl.
+	<E_Subprogram_Type>: Likewise for const and noreturn subprograms.
+	(get_minimal_subprog_decl): Adjust call to create_subprog_decl.
+	(elaborate_expression_1): Adjust call to create_var_decl.
+	(gnat_to_gnu_field): Minor tweak.
+	* gcc-interface/trans.c (gigi): Adjust calls to create_var_decl and
+	create_subprog_decl.
+	(build_raise_check): Likewise.
+	(Subprogram_Body_to_gnu): Likewise.
+	(create_temporary): Likewise.
+	(Handled_Sequence_Of_Statements_to_gnu): Likewise.
+	(Exception_Handler_to_gnu_gcc): Likewise.
+	(Compilation_Unit_to_gnu): Likewise.
+	(gnat_to_gnu): Likewise.
+	* gcc-interface/utils.c (maybe_pad_type): Likewise.
+	(create_var_decl): Add VOLATILE_FLAG parameter and handle it.
+	(create_subprog_decl): Add CONST_FLAG and VOLATILE_FLAG parameters and
+	handle them.
+
+2015-11-30  Eric Botcazou  <ebotcazou@adacore.com>
+
 	* gcc-interface/gigi.h (is_simple_additive_expression): Declare.
 	* gcc-interface/trans.c (struct range_check_info_d): Add DISP and
 	NEG_P fields.

gcc/ada/gcc-interface/decl.c

@@ -598,7 +598,12 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 		 || Present (Renamed_Object (gnat_entity))
 		 || imported_p));
 	bool inner_const_flag = const_flag;
-	bool static_p = Is_Statically_Allocated (gnat_entity);
+	bool static_flag = Is_Statically_Allocated (gnat_entity);
+	/* We implement RM 13.3(19) for exported and imported (non-constant)
+	   objects by making them volatile.  */
+	bool volatile_flag
+	  = (Treat_As_Volatile (gnat_entity)
+	     || (!const_flag && (Is_Exported (gnat_entity) || imported_p)));
 	bool mutable_p = false;
 	bool used_by_ref = false;
 	tree gnu_ext_name = NULL_TREE;
@@ -1034,10 +1039,10 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 		if (TREE_THIS_VOLATILE (gnu_expr) && !TYPE_VOLATILE (gnu_type))
 		  gnu_type
 		    = change_qualified_type (gnu_type, TYPE_QUAL_VOLATILE);
-
 		gnu_type = build_reference_type (gnu_type);
 		used_by_ref = true;
 		const_flag = true;
+		volatile_flag = false;
 		inner_const_flag = TREE_READONLY (gnu_expr);
 		gnu_size = NULL_TREE;
 
@@ -1068,21 +1073,6 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	      }
 	  }
 
-	/* Make a volatile version of this object's type if we are to make
-	   the object volatile.  We also implement RM 13.3(19) for exported
-	   and imported (non-constant) objects by making them volatile.  */
-	if ((Treat_As_Volatile (gnat_entity)
-	     || (!const_flag
-		 && gnu_type != except_type_node
-		 && (Is_Exported (gnat_entity) || imported_p)))
-	    && !TYPE_VOLATILE (gnu_type))
-	  {
-	    const int quals
-	      = TYPE_QUAL_VOLATILE
-		| (Is_Atomic_Or_VFA (gnat_entity) ? TYPE_QUAL_ATOMIC : 0);
-	    gnu_type = change_qualified_type (gnu_type, quals);
-	  }
-
 	/* If we are defining an aliased object whose nominal subtype is
 	   unconstrained, the object is a record that contains both the
 	   template and the object.  If there is an initializer, it will
@@ -1142,13 +1132,16 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 
 	    /* Convert the type of the object to a reference type that can
 	       alias everything as per RM 13.3(19).  */
+	    if (volatile_flag && !TYPE_VOLATILE (gnu_type))
+	      gnu_type = change_qualified_type (gnu_type, TYPE_QUAL_VOLATILE);
 	    gnu_type
 	      = build_reference_type_for_mode (gnu_type, ptr_mode, true);
 	    gnu_address = convert (gnu_type, gnu_address);
 	    used_by_ref = true;
 	    const_flag
-	      = !Is_Public (gnat_entity)
-		|| compile_time_known_address_p (gnat_expr);
+	      = (!Is_Public (gnat_entity)
+		 || compile_time_known_address_p (gnat_expr));
+	    volatile_flag = false;
 	    gnu_size = NULL_TREE;
 
 	    /* If this is an aliased object with an unconstrained array nominal
@@ -1210,9 +1203,13 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	  {
 	    /* Convert the type of the object to a reference type that can
 	       alias everything as per RM 13.3(19).  */
+	    if (volatile_flag && !TYPE_VOLATILE (gnu_type))
+	      gnu_type = change_qualified_type (gnu_type, TYPE_QUAL_VOLATILE);
 	    gnu_type
 	      = build_reference_type_for_mode (gnu_type, ptr_mode, true);
 	    used_by_ref = true;
+	    const_flag = false;
+	    volatile_flag = false;
 	    gnu_size = NULL_TREE;
 
 	    /* No point in taking the address of an initializing expression
@@ -1248,7 +1245,7 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	if (!allocatable_size_p (TYPE_SIZE_UNIT (gnu_type),
 				 global_bindings_p ()
 				 || !definition
-				 || static_p)
+				 || static_flag)
 	    || (gnu_size
 		&& !allocatable_size_p (convert (sizetype,
 						 size_binop
@@ -1256,11 +1253,14 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 						  bitsize_unit_node)),
 					global_bindings_p ()
 					|| !definition
-					|| static_p)))
+					|| static_flag)))
 	  {
+	    if (volatile_flag && !TYPE_VOLATILE (gnu_type))
+	      gnu_type = change_qualified_type (gnu_type, TYPE_QUAL_VOLATILE);
 	    gnu_type = build_reference_type (gnu_type);
 	    used_by_ref = true;
 	    const_flag = true;
+	    volatile_flag = false;
 	    gnu_size = NULL_TREE;
 
 	    /* In case this was a aliased object whose nominal subtype is
@@ -1314,7 +1314,7 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	   a variable of "aligning type".  */
 	if (definition
 	    && !global_bindings_p ()
-	    && !static_p
+	    && !static_flag
 	    && !imported_p
 	    && TYPE_ALIGN (gnu_type) > BIGGEST_ALIGNMENT)
 	  {
@@ -1326,9 +1326,9 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 				    BIGGEST_ALIGNMENT, 0, gnat_entity);
 	    tree gnu_new_var
 	      = create_var_decl (create_concat_name (gnat_entity, "ALIGN"),
-				 NULL_TREE, gnu_new_type, NULL_TREE, false,
-				 false, false, false, true, debug_info_p,
-				 NULL, gnat_entity);
+				 NULL_TREE, gnu_new_type, NULL_TREE,
+				 false, false, false, false, false,
+				 true, debug_info_p, NULL, gnat_entity);
 
 	    /* Initialize the aligned field if we have an initializer.  */
 	    if (gnu_expr)
@@ -1351,6 +1351,7 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 
 	    used_by_ref = true;
 	    const_flag = true;
+	    volatile_flag = false;
 	    gnu_size = NULL_TREE;
 	  }
 
@@ -1375,13 +1376,15 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 		   = create_var_decl (concat_name (gnu_entity_name, "UNC"),
 				      NULL_TREE, gnu_type, gnu_expr,
 				      const_flag, Is_Public (gnat_entity),
-				      imported_p || !definition, static_p,
-				      true, debug_info_p, NULL, gnat_entity);
+				      imported_p || !definition, static_flag,
+				      volatile_flag, true, debug_info_p,
+				      NULL, gnat_entity);
 		gnu_expr = build_unary_op (ADDR_EXPR, NULL_TREE, gnu_unc_var);
 		TREE_CONSTANT (gnu_expr) = 1;
 
 		used_by_ref = true;
 		const_flag = true;
+		volatile_flag = false;
 		inner_const_flag = TREE_READONLY (gnu_unc_var);
 		gnu_size = NULL_TREE;
 	      }
@@ -1408,7 +1411,7 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 
 	/* If this is an aggregate constant initialized to a constant, force it
 	   to be statically allocated.  This saves an initialization copy.  */
-	if (!static_p
+	if (!static_flag
 	    && const_flag
 	    && gnu_expr && TREE_CONSTANT (gnu_expr)
 	    && AGGREGATE_TYPE_P (gnu_type)
@@ -1416,7 +1419,7 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	    && !(TYPE_IS_PADDING_P (gnu_type)
 		 && !tree_fits_uhwi_p (TYPE_SIZE_UNIT
 				       (TREE_TYPE (TYPE_FIELDS (gnu_type))))))
-	  static_p = true;
+	  static_flag = true;
 
 	/* Deal with a pragma Linker_Section on a constant or variable.  */
 	if ((kind == E_Constant || kind == E_Variable)
@@ -1428,9 +1431,9 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	gnu_decl
 	  = create_var_decl (gnu_entity_name, gnu_ext_name, gnu_type,
 			     gnu_expr, const_flag, Is_Public (gnat_entity),
-			     imported_p || !definition, static_p,
-			     artificial_p, debug_info_p, attr_list,
-			     gnat_entity, !renamed_obj);
+			     imported_p || !definition, static_flag,
+			     volatile_flag, artificial_p, debug_info_p,
+			     attr_list, gnat_entity, !renamed_obj);
 	DECL_BY_REF_P (gnu_decl) = used_by_ref;
 	DECL_POINTS_TO_READONLY_P (gnu_decl) = used_by_ref && inner_const_flag;
 	DECL_CAN_NEVER_BE_NULL_P (gnu_decl) = Can_Never_Be_Null (gnat_entity);
@@ -1481,9 +1484,9 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	    tree gnu_corr_var
 	      = create_var_decl (gnu_entity_name, gnu_ext_name, gnu_type,
 				 gnu_expr, true, Is_Public (gnat_entity),
-				 !definition, static_p, artificial_p,
-				 debug_info_p, attr_list, gnat_entity,
-				 false);
+				 !definition, static_flag, volatile_flag,
+				 artificial_p, debug_info_p, attr_list,
+				 gnat_entity, false);
 
 	    SET_DECL_CONST_CORRESPONDING_VAR (gnu_decl, gnu_corr_var);
 	  }
@@ -1599,8 +1602,8 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	      tree gnu_literal
 		= create_var_decl (get_entity_name (gnat_literal), NULL_TREE,
 				   gnu_type, gnu_value, true, false, false,
-				   false, !Comes_From_Source (gnat_literal),
-				   false, NULL, gnat_literal);
+				   false, false, artificial_p, false,
+				   NULL, gnat_literal);
 	      save_gnu_tree (gnat_literal, gnu_literal, false);
 	      gnu_list
 	        = tree_cons (DECL_NAME (gnu_literal), gnu_value, gnu_list);
@@ -3583,8 +3586,9 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 		      = create_var_decl (create_concat_name (gnat_entity,
 							     "XVZ"),
 					 NULL_TREE, sizetype, gnu_size_unit,
-					 false, false, false, false, true,
-					 debug_info_p, NULL, gnat_entity);
+					 false, false, false, false, false,
+					 true, debug_info_p,
+					 NULL, gnat_entity);
 		}
 
 	      gnu_variant_list.release ();
@@ -4090,10 +4094,8 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
           Ada subprograms that can throw have side effects since they can
           trigger an "abnormal" transfer of control flow; thus they can be
           neither "const" nor "pure" in the back-end sense.  */
-	bool const_flag
-	  = (Back_End_Exceptions ()
-	     && Is_Pure (gnat_entity));
-	bool noreturn_flag = No_Return (gnat_entity);
+	bool const_flag = (Back_End_Exceptions () && Is_Pure (gnat_entity));
+	bool volatile_flag = No_Return (gnat_entity);
 	bool return_by_direct_ref_p = false;
 	bool return_by_invisi_ref_p = false;
 	bool return_unconstrained_p = false;
@@ -4552,14 +4554,6 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	if (TREE_CODE (gnu_return_type) == VOID_TYPE || return_unconstrained_p)
 	  const_flag = false;
 
-	if (const_flag || noreturn_flag)
-	  {
-	    const int quals
-	      = (const_flag ? TYPE_QUAL_CONST : 0)
-		| (noreturn_flag ? TYPE_QUAL_VOLATILE : 0);
-	    gnu_type = change_qualified_type (gnu_type, quals);
-	  }
-
 	/* If we have a builtin decl for that function, use it.  Check if the
 	   profiles are compatible and warn if they are not.  The checker is
 	   expected to post extra diagnostics in this case.  */
@@ -4617,7 +4611,7 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	    gnu_decl
 	      = create_var_decl (gnu_entity_name, gnu_ext_name, gnu_type,
 				 gnu_address, false, Is_Public (gnat_entity),
-				 extern_flag, false, artificial_p,
+				 extern_flag, false, false, artificial_p,
 				 debug_info_p, NULL, gnat_entity);
 	    DECL_BY_REF_P (gnu_decl) = 1;
 	  }
@@ -4625,6 +4619,15 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	else if (kind == E_Subprogram_Type)
 	  {
 	    process_attributes (&gnu_type, &attr_list, false, gnat_entity);
+
+	    if (const_flag || volatile_flag)
+	      {
+		const int quals
+		  = (const_flag ? TYPE_QUAL_CONST : 0)
+		     | (volatile_flag ? TYPE_QUAL_VOLATILE : 0);
+		gnu_type = change_qualified_type (gnu_type, quals);
+	      }
+
 	    gnu_decl
 	      = create_type_decl (gnu_entity_name, gnu_type, artificial_p,
 				  debug_info_p, gnat_entity);
@@ -4633,9 +4636,10 @@ gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr, int definition)
 	  {
 	    gnu_decl
 	      = create_subprog_decl (gnu_entity_name, gnu_ext_name, gnu_type,
-				     gnu_param_list, inline_status,
-				     public_flag, extern_flag, artificial_p,
-				     debug_info_p, attr_list, gnat_entity);
+				     gnu_param_list, inline_status, const_flag,
+				     public_flag, extern_flag, volatile_flag,
+				     artificial_p, debug_info_p,
+				     attr_list, gnat_entity);
 	    /* This is unrelated to the stub built right above.  */
 	    DECL_STUBBED_P (gnu_decl)
 	      = Convention (gnat_entity) == Convention_Stubbed;
@@ -5418,8 +5422,8 @@ get_minimal_subprog_decl (Entity_Id gnat_entity)
 
   return
     create_subprog_decl (gnu_entity_name, gnu_ext_name, void_ftype, NULL_TREE,
-			 is_disabled, true, true, true, false, attr_list,
-			 gnat_entity);
+			 is_disabled, false, true, true, false, true, false,
+			 attr_list, gnat_entity);
 }
 
 /* Return whether the E_Subprogram_Type/E_Function/E_Procedure GNAT_ENTITY is
@@ -6311,7 +6315,8 @@ elaborate_expression_1 (tree gnu_expr, Entity_Id gnat_entity, const char *s,
 	= create_var_decl (create_concat_name (gnat_entity, s), NULL_TREE,
 			   TREE_TYPE (gnu_expr), gnu_expr, true,
 			   expr_public_p, !definition && expr_global_p,
-			   expr_global_p, true, need_debug, NULL, gnat_entity);
+			   expr_global_p, false, true, need_debug,
+			   NULL, gnat_entity);
 
       /* Using this variable at debug time (if need_debug is true) requires a
 	 proper location.  The back-end will compute a location for this
@@ -6824,7 +6829,7 @@ gnat_to_gnu_field (Entity_Id gnat_field, tree gnu_record_type, int packed,
 			 gnu_size, gnu_pos, packed, Is_Aliased (gnat_field));
   Sloc_to_locus (Sloc (gnat_field), &DECL_SOURCE_LOCATION (gnu_field));
   DECL_ALIASED_P (gnu_field) = Is_Aliased (gnat_field);
-  TREE_THIS_VOLATILE (gnu_field) = TREE_SIDE_EFFECTS (gnu_field) = is_volatile;
+  TREE_SIDE_EFFECTS (gnu_field) = TREE_THIS_VOLATILE (gnu_field) = is_volatile;
 
   if (Ekind (gnat_field) == E_Discriminant)
     {

gcc/ada/gcc-interface/gigi.h

@@ -685,8 +685,10 @@ extern tree create_type_decl (tree name, tree type, bool artificial_p,
    EXTERN_FLAG is nonzero when processing an external variable declaration (as
    opposed to a definition: no storage is to be allocated for the variable).
 
-   STATIC_FLAG is only relevant when not at top level.  In that case
-   it indicates whether to always allocate storage to the variable.
+   STATIC_FLAG is only relevant when not at top level and indicates whether
+   to always allocate storage to the variable.
+
+   VOLATILE_FLAG is true if this variable is declared as volatile.
 
    ARTIFICIAL_P is true if the variable was generated by the compiler.
 
@@ -696,6 +698,7 @@ extern tree create_type_decl (tree name, tree type, bool artificial_p,
 extern tree create_var_decl (tree name, tree asm_name, tree type, tree init,
 			     bool const_flag, bool public_flag,
 			     bool extern_flag, bool static_flag,
+			     bool volatile_flag,
 			     bool artificial_p, bool debug_info_p,
 			     struct attrib *attr_list, Node_Id gnat_node,
 			     bool const_decl_allowed_p = true);
@@ -725,8 +728,8 @@ extern tree create_label_decl (tree name, Node_Id gnat_node);
    the list of its parameters (a list of PARM_DECL nodes chained through the
    DECL_CHAIN field).
 
-   INLINE_STATUS, PUBLIC_FLAG, EXTERN_FLAG and ATTR_LIST are used to set the
-   appropriate fields in the FUNCTION_DECL.
+   INLINE_STATUS, CONST_FLAG, PUBLIC_FLAG, EXTERN_FLAG, VOLATILE_FLAG as well
+   as ATTR_LIST are used to set the appropriate fields in the FUNCTION_DECL.
 
    ARTIFICIAL_P is true if the subprogram was generated by the compiler.
 
@@ -736,7 +739,8 @@ extern tree create_label_decl (tree name, Node_Id gnat_node);
 extern tree create_subprog_decl (tree name, tree asm_name, tree type,
 				 tree param_decl_list,
 				 enum inline_status_t inline_status,
-				 bool public_flag, bool extern_flag,
+				 bool const_flag, bool public_flag,
+				 bool extern_flag, bool volatile_flag,
 				 bool artificial_p, bool debug_info_p,
 				 struct attrib *attr_list, Node_Id gnat_node);
 

gcc/ada/gcc-interface/trans.c

@@ -375,14 +375,14 @@ gigi (Node_Id gnat_root,
   t = UI_To_gnu (Enumeration_Rep (gnat_literal), boolean_type_node);
   gcc_assert (t == boolean_false_node);
   t = create_var_decl (get_entity_name (gnat_literal), NULL_TREE,
-		       boolean_type_node, t, true, false, false, false,
+		       boolean_type_node, t, true, false, false, false, false,
 		       true, false, NULL, gnat_literal);
   save_gnu_tree (gnat_literal, t, false);
   gnat_literal = Next_Literal (gnat_literal);
   t = UI_To_gnu (Enumeration_Rep (gnat_literal), boolean_type_node);
   gcc_assert (t == boolean_true_node);
   t = create_var_decl (get_entity_name (gnat_literal), NULL_TREE,
-		       boolean_type_node, t, true, false, false, false,
+		       boolean_type_node, t, true, false, false, false, false,
 		       true, false, NULL, gnat_literal);
   save_gnu_tree (gnat_literal, t, false);
 
@@ -397,8 +397,8 @@ gigi (Node_Id gnat_root,
   malloc_decl
     = create_subprog_decl (get_identifier ("__gnat_malloc"), NULL_TREE,
 			   ftype,
-			   NULL_TREE, is_disabled, true, true, true, false,
-			   NULL, Empty);
+			   NULL_TREE, is_disabled, false, true, true, false,
+			   true, false, NULL, Empty);
   DECL_IS_MALLOC (malloc_decl) = 1;
 
   /* free is a function declaration tree for a function to free memory.  */
@@ -407,8 +407,8 @@ gigi (Node_Id gnat_root,
 			   build_function_type_list (void_type_node,
 						     ptr_type_node,
 						     NULL_TREE),
-			   NULL_TREE, is_disabled, true, true, true, false,
-			   NULL, Empty);
+			   NULL_TREE, is_disabled, false, true, true, false,
+			   true, false, NULL, Empty);
 
   /* This is used for 64-bit multiplication with overflow checking.  */
   int64_type = gnat_type_for_size (64, 0);
@@ -416,8 +416,8 @@ gigi (Node_Id gnat_root,
     = create_subprog_decl (get_identifier ("__gnat_mulv64"), NULL_TREE,
 			   build_function_type_list (int64_type, int64_type,
 						     int64_type, NULL_TREE),
-			   NULL_TREE, is_disabled, true, true, true, false,
-			   NULL, Empty);
+			   NULL_TREE, is_disabled, false, true, true, false,
+			   true, false, NULL, Empty);
 
   /* Name of the _Parent field in tagged record types.  */
   parent_name_id = get_identifier (Get_Name_String (Name_uParent));
@@ -440,21 +440,24 @@ gigi (Node_Id gnat_root,
     = create_subprog_decl
       (get_identifier ("system__soft_links__get_jmpbuf_address_soft"),
        NULL_TREE, build_function_type_list (jmpbuf_ptr_type, NULL_TREE),
-       NULL_TREE, is_disabled, true, true, true, false, NULL, Empty);
+       NULL_TREE, is_disabled, false, true, true, false, true, false,
+       NULL, Empty);
 
   set_jmpbuf_decl
     = create_subprog_decl
       (get_identifier ("system__soft_links__set_jmpbuf_address_soft"),
        NULL_TREE, build_function_type_list (void_type_node, jmpbuf_ptr_type,
 					    NULL_TREE),
-       NULL_TREE, is_disabled, true, true, true, false, NULL, Empty);
+       NULL_TREE, is_disabled, false, true, true, false, true, false,
+       NULL, Empty);
 
   get_excptr_decl
     = create_subprog_decl
       (get_identifier ("system__soft_links__get_gnat_exception"), NULL_TREE,
        build_function_type_list (build_pointer_type (except_type_node),
 				 NULL_TREE),
-       NULL_TREE, is_disabled, true, true, true, false, NULL, Empty);
+       NULL_TREE, is_disabled, false, true, true, false, true, false,
+       NULL, Empty);
 
   not_handled_by_others_decl = get_identifier ("not_handled_by_others");
   for (t = TYPE_FIELDS (except_type_node); t; t = DECL_CHAIN (t))
@@ -472,7 +475,8 @@ gigi (Node_Id gnat_root,
       (get_identifier ("__builtin_setjmp"), NULL_TREE,
        build_function_type_list (integer_type_node, jmpbuf_ptr_type,
 				 NULL_TREE),
-       NULL_TREE, is_disabled, true, true, true, false, NULL, Empty);
+       NULL_TREE, is_disabled, false, true, true, false, true, false,
+       NULL, Empty);
   DECL_BUILT_IN_CLASS (setjmp_decl) = BUILT_IN_NORMAL;
   DECL_FUNCTION_CODE (setjmp_decl) = BUILT_IN_SETJMP;
 
@@ -482,42 +486,35 @@ gigi (Node_Id gnat_root,
     = create_subprog_decl
       (get_identifier ("__builtin_update_setjmp_buf"), NULL_TREE,
        build_function_type_list (void_type_node, jmpbuf_ptr_type, NULL_TREE),
-       NULL_TREE, is_disabled, true, true, true, false, NULL, Empty);
+       NULL_TREE, is_disabled, false, true, true, false, true, false,
+       NULL, Empty);
   DECL_BUILT_IN_CLASS (update_setjmp_buf_decl) = BUILT_IN_NORMAL;
   DECL_FUNCTION_CODE (update_setjmp_buf_decl) = BUILT_IN_UPDATE_SETJMP_BUF;
 
+  /* Indicate that it never returns.  */
   raise_nodefer_decl
     = create_subprog_decl
       (get_identifier ("__gnat_raise_nodefer_with_msg"), NULL_TREE,
        build_function_type_list (void_type_node,
 				 build_pointer_type (except_type_node),
 				 NULL_TREE),
-       NULL_TREE, is_disabled, true, true, true, false, NULL, Empty);
-
-  /* Indicate that it never returns.  */
-  TREE_THIS_VOLATILE (raise_nodefer_decl) = 1;
-  TREE_SIDE_EFFECTS (raise_nodefer_decl) = 1;
-  TREE_TYPE (raise_nodefer_decl)
-    = build_qualified_type (TREE_TYPE (raise_nodefer_decl),
-			    TYPE_QUAL_VOLATILE);
+       NULL_TREE, is_disabled, false, true, true, true, true, false,
+       NULL, Empty);
 
+  /* Indicate that these never return.  */
   reraise_zcx_decl
     = create_subprog_decl (get_identifier ("__gnat_reraise_zcx"), NULL_TREE,
 			   ftype, NULL_TREE,
-			   is_disabled, true, true, true, false,
+			   is_disabled, false, true, true, true, true, false,
 			   NULL, Empty);
-  /* Indicate that these never return.  */
-  TREE_THIS_VOLATILE (reraise_zcx_decl) = 1;
-  TREE_SIDE_EFFECTS (reraise_zcx_decl) = 1;
-  TREE_TYPE (reraise_zcx_decl)
-    = build_qualified_type (TREE_TYPE (reraise_zcx_decl), TYPE_QUAL_VOLATILE);
 
   set_exception_parameter_decl
     = create_subprog_decl
       (get_identifier ("__gnat_set_exception_parameter"), NULL_TREE,
        build_function_type_list (void_type_node, ptr_type_node, ptr_type_node,
 				 NULL_TREE),
-       NULL_TREE, is_disabled, true, true, true, false, NULL, Empty);
+       NULL_TREE, is_disabled, false, true, true, false, true, false,
+       NULL, Empty);
 
   /* Hooks to call when entering/leaving an exception handler.  */
   ftype = build_function_type_list (void_type_node, ptr_type_node, NULL_TREE);
@@ -525,19 +522,19 @@ gigi (Node_Id gnat_root,
   begin_handler_decl
     = create_subprog_decl (get_identifier ("__gnat_begin_handler"), NULL_TREE,
 			   ftype, NULL_TREE,
-			   is_disabled, true, true, true, false,
+			   is_disabled, false, true, true, false, true, false,
 			   NULL, Empty);
 
   end_handler_decl
     = create_subprog_decl (get_identifier ("__gnat_end_handler"), NULL_TREE,
 			   ftype, NULL_TREE,
-			   is_disabled, true, true, true, false,
+			   is_disabled, false, true, true, false, true, false,
 			   NULL, Empty);
 
   unhandled_except_decl
     = create_subprog_decl (get_identifier ("__gnat_unhandled_except_handler"),
 			   NULL_TREE, ftype, NULL_TREE,
-			   is_disabled, true, true, true, false,
+			   is_disabled, false, true, true, false, true, false,
 			   NULL, Empty);
 
   /* Dummy objects to materialize "others" and "all others" in the exception
@@ -547,21 +544,21 @@ gigi (Node_Id gnat_root,
     = create_var_decl (get_identifier ("OTHERS"),
 		       get_identifier ("__gnat_others_value"),
 		       unsigned_char_type_node, NULL_TREE,
-		       true, false, true, false, true, false,
+		       true, false, true, false, false, true, false,
 		       NULL, Empty);
 
   all_others_decl
     = create_var_decl (get_identifier ("ALL_OTHERS"),
 		       get_identifier ("__gnat_all_others_value"),
 		       unsigned_char_type_node, NULL_TREE,
-		       true, false, true, false, true, false,
+		       true, false, true, false, false, true, false,
 		       NULL, Empty);
 
   unhandled_others_decl
     = create_var_decl (get_identifier ("UNHANDLED_OTHERS"),
 		       get_identifier ("__gnat_unhandled_others_value"),
 		       unsigned_char_type_node, NULL_TREE,
-		       true, false, true, false, true, false,
+		       true, false, true, false, false, true, false,
 		       NULL, Empty);
 
   /* If in no exception handlers mode, all raise statements are redirected to
@@ -576,11 +573,8 @@ gigi (Node_Id gnat_root,
 				     build_pointer_type
 				     (unsigned_char_type_node),
 				     integer_type_node, NULL_TREE),
-	   NULL_TREE, is_disabled, true, true, true, false, NULL, Empty);
-      TREE_THIS_VOLATILE (decl) = 1;
-      TREE_SIDE_EFFECTS (decl) = 1;
-      TREE_TYPE (decl)
-	= build_qualified_type (TREE_TYPE (decl), TYPE_QUAL_VOLATILE);
+	   NULL_TREE, is_disabled, false, true, true, true, true, false,
+	   NULL, Empty);
       for (i = 0; i < (int) ARRAY_SIZE (gnat_raise_decls); i++)
 	gnat_raise_decls[i] = decl;
     }
@@ -742,18 +736,13 @@ build_raise_check (int check, enum exception_info_kind kind)
 				    t, t, NULL_TREE);
     }
 
+  /* Indicate that it never returns.  */
   result
-    = create_subprog_decl (get_identifier (Name_Buffer),
-			   NULL_TREE, ftype, NULL_TREE,
-			   is_disabled, true, true, true, false,
+    = create_subprog_decl (get_identifier (Name_Buffer), NULL_TREE,
+			   ftype, NULL_TREE,
+			   is_disabled, false, true, true, true, true, false,
 			   NULL, Empty);
 
-  /* Indicate that it never returns.  */
-  TREE_THIS_VOLATILE (result) = 1;
-  TREE_SIDE_EFFECTS (result) = 1;
-  TREE_TYPE (result)
-    = build_qualified_type (TREE_TYPE (result), TYPE_QUAL_VOLATILE);
-
   return result;
 }
 
@@ -3827,9 +3816,9 @@ Subprogram_Body_to_gnu (Node_Id gnat_node)
 
 	  gnu_return_var
 	    = create_var_decl (get_identifier ("RETVAL"), NULL_TREE,
-			       gnu_return_type, NULL_TREE, false, false,
-			       false, false, true, false,
-			       NULL, gnat_subprog_id);
+			       gnu_return_type, NULL_TREE,
+			       false, false, false, false, false,
+			       true, false, NULL, gnat_subprog_id);
 	  TREE_VALUE (gnu_return_var_elmt) = gnu_return_var;
 	}
 
@@ -4230,8 +4219,10 @@ atomic_access_required_p (Node_Id gnat_node, bool *sync)
 static tree
 create_temporary (const char *prefix, tree type)
 {
-  tree gnu_temp = create_var_decl (create_tmp_var_name (prefix), NULL_TREE,
-				   type, NULL_TREE, false, false, false, false,
+  tree gnu_temp
+    = create_var_decl (create_tmp_var_name (prefix), NULL_TREE,
+		      type, NULL_TREE,
+		      false, false, false, false, false,
 		      true, false, NULL, Empty);
   return gnu_temp;
 }
@@ -5008,7 +4999,7 @@ Handled_Sequence_Of_Statements_to_gnu (Node_Id gnat_node)
 	= create_var_decl (get_identifier ("JMPBUF_SAVE"), NULL_TREE,
 			   jmpbuf_ptr_type,
 			   build_call_n_expr (get_jmpbuf_decl, 0),
-			   false, false, false, false, true, false,
+			   false, false, false, false, false, true, false,
 			   NULL, gnat_node);
 
       /* The __builtin_setjmp receivers will immediately reinstall it.  Now
@@ -5020,7 +5011,7 @@ Handled_Sequence_Of_Statements_to_gnu (Node_Id gnat_node)
 	= create_var_decl (get_identifier ("JMP_BUF"), NULL_TREE,
 			   jmpbuf_type,
 			   NULL_TREE,
-			   false, false, false, false, true, false,
+			   false, false, false, false, false, true, false,
 			   NULL, gnat_node);
 
       set_block_jmpbuf_decl (gnu_jmpbuf_decl);
@@ -5084,8 +5075,8 @@ Handled_Sequence_Of_Statements_to_gnu (Node_Id gnat_node)
 		     create_var_decl (get_identifier ("EXCEPT_PTR"), NULL_TREE,
 				      build_pointer_type (except_type_node),
 				      build_call_n_expr (get_excptr_decl, 0),
-				      false, false, false, false, true, false,
-				      NULL, gnat_node));
+				      false, false, false, false, false,
+				      true, false, NULL, gnat_node));
 
       /* Generate code for each handler. The N_Exception_Handler case does the
 	 real work and returns a COND_EXPR for each handler, which we chain
@@ -5334,7 +5325,7 @@ Exception_Handler_to_gnu_gcc (Node_Id gnat_node)
   gnu_incoming_exc_ptr
     = create_var_decl (get_identifier ("EXPTR"), NULL_TREE,
 		       ptr_type_node, gnu_current_exc_ptr,
-		       false, false, false, false, true, true,
+		       false, false, false, false, false, true, true,
 		       NULL, gnat_node);
 
   add_stmt_with_node (build_call_n_expr (begin_handler_decl, 1,
@@ -5381,7 +5372,8 @@ Compilation_Unit_to_gnu (Node_Id gnat_node)
   tree gnu_elab_proc_decl
     = create_subprog_decl
       (create_concat_name (gnat_unit_entity, body_p ? "elabb" : "elabs"),
-       NULL_TREE, void_ftype, NULL_TREE, is_disabled, true, false, true, true,
+       NULL_TREE, void_ftype, NULL_TREE,
+       is_disabled, false, true, false, false, true, true,
        NULL, gnat_unit);
   struct elab_info *info;
 
@@ -6410,7 +6402,8 @@ gnat_to_gnu (Node_Id gnat_node)
 				 (Entity (Prefix (gnat_node)),
 				  attr == Attr_Elab_Body ? "elabb" : "elabs"),
 				 NULL_TREE, void_ftype, NULL_TREE, is_disabled,
-				 true, true, true, true, NULL, gnat_node);
+				 false, true, true, false, true, true,
+				 NULL, gnat_node);
 
 	gnu_result = Attribute_to_gnu (gnat_node, &gnu_result_type, attr);
       }
@@ -7379,8 +7372,8 @@ gnat_to_gnu (Node_Id gnat_node)
 	 deallocated.  */
       gnu_expr = create_var_decl (get_identifier ("SAVED_EXPTR"), NULL_TREE,
 				  ptr_type_node, gnu_incoming_exc_ptr,
-				  false, false, false, false, true, true,
-				  NULL, gnat_node);
+				  false, false, false, false, false,
+				  true, true, NULL, gnat_node);
 
       add_stmt (build_binary_op (MODIFY_EXPR, NULL_TREE, gnu_incoming_exc_ptr,
 				 convert (ptr_type_node, integer_zero_node)));

gcc/ada/gcc-interface/utils.c

@@ -1369,7 +1369,7 @@ maybe_pad_type (tree type, tree size, unsigned int align,
 	    = create_var_decl (concat_name (name, "XVZ"), NULL_TREE, sizetype,
 			      size_unit, true, global_bindings_p (),
 			      !definition && global_bindings_p (), false,
-			      true, true, NULL, gnat_entity);
+			      false, true, true, NULL, gnat_entity);
 	  TYPE_SIZE_UNIT (record) = size_unit;
 	}
 
@@ -2335,8 +2335,10 @@ create_type_decl (tree name, tree type, bool artificial_p, bool debug_info_p,
    EXTERN_FLAG is true when processing an external variable declaration (as
    opposed to a definition: no storage is to be allocated for the variable).
 
-   STATIC_FLAG is only relevant when not at top level.  In that case
-   it indicates whether to always allocate storage to the variable.
+   STATIC_FLAG is only relevant when not at top level and indicates whether
+   to always allocate storage to the variable.
+
+   VOLATILE_FLAG is true if this variable is declared as volatile.
 
    ARTIFICIAL_P is true if the variable was generated by the compiler.
 
@@ -2347,9 +2349,9 @@ create_type_decl (tree name, tree type, bool artificial_p, bool debug_info_p,
 tree
 create_var_decl (tree name, tree asm_name, tree type, tree init,
 		 bool const_flag, bool public_flag, bool extern_flag,
-		 bool static_flag, bool artificial_p, bool debug_info_p,
-		 struct attrib *attr_list, Node_Id gnat_node,
-		 bool const_decl_allowed_p)
+		 bool static_flag, bool volatile_flag, bool artificial_p,
+		 bool debug_info_p, struct attrib *attr_list,
+		 Node_Id gnat_node, bool const_decl_allowed_p)
 {
   /* Whether the object has static storage duration, either explicitly or by
      virtue of being declared at the global level.  */
@@ -2406,16 +2408,6 @@ create_var_decl (tree name, tree asm_name, tree type, tree init,
   /* Directly set some flags.  */
   DECL_ARTIFICIAL (var_decl) = artificial_p;
   DECL_EXTERNAL (var_decl) = extern_flag;
-  TREE_CONSTANT (var_decl) = constant_p;
-  TREE_READONLY (var_decl) = const_flag;
-
-  /* We need to allocate static storage for an object with static storage
-     duration if it isn't external.  */
-  TREE_STATIC (var_decl) = !extern_flag && static_storage;
-
-  /* The object is public if it is external or if it is declared public
-     and has static storage duration.  */
-  TREE_PUBLIC (var_decl) = extern_flag || (public_flag && static_storage);
 
   /* Ada doesn't feature Fortran-like COMMON variables so we shouldn't
      try to fiddle with DECL_COMMON.  However, on platforms that don't
@@ -2441,8 +2433,20 @@ create_var_decl (tree name, tree asm_name, tree type, tree init,
 	     != null_pointer_node))
     DECL_IGNORED_P (var_decl) = 1;
 
-  if (TYPE_VOLATILE (type))
-    TREE_SIDE_EFFECTS (var_decl) = TREE_THIS_VOLATILE (var_decl) = 1;
+  TREE_CONSTANT (var_decl) = constant_p;
+  TREE_READONLY (var_decl) = const_flag;
+
+  /* The object is public if it is external or if it is declared public
+     and has static storage duration.  */
+  TREE_PUBLIC (var_decl) = extern_flag || (public_flag && static_storage);
+
+  /* We need to allocate static storage for an object with static storage
+     duration if it isn't external.  */
+  TREE_STATIC (var_decl) = !extern_flag && static_storage;
+
+  TREE_SIDE_EFFECTS (var_decl)
+    = TREE_THIS_VOLATILE (var_decl)
+    = TYPE_VOLATILE (type) | volatile_flag;
 
   if (TREE_SIDE_EFFECTS (var_decl))
     TREE_ADDRESSABLE (var_decl) = 1;
@@ -3044,8 +3048,8 @@ create_label_decl (tree name, Node_Id gnat_node)
    the list of its parameters (a list of PARM_DECL nodes chained through the
    DECL_CHAIN field).
 
-   INLINE_STATUS, PUBLIC_FLAG, EXTERN_FLAG and ATTR_LIST are used to set the
-   appropriate fields in the FUNCTION_DECL.
+   INLINE_STATUS, CONST_FLAG, PUBLIC_FLAG, EXTERN_FLAG, VOLATILE_FLAG as well
+   as ATTR_LIST are used to set the appropriate fields in the FUNCTION_DECL.
 
    ARTIFICIAL_P is true if the subprogram was generated by the compiler.
 
@@ -3055,8 +3059,9 @@ create_label_decl (tree name, Node_Id gnat_node)
 
 tree
 create_subprog_decl (tree name, tree asm_name, tree type, tree param_decl_list,
-		     enum inline_status_t inline_status, bool public_flag,
-		     bool extern_flag, bool artificial_p, bool debug_info_p,
+		     enum inline_status_t inline_status, bool const_flag,
+		     bool public_flag, bool extern_flag, bool volatile_flag,
+		     bool artificial_p, bool debug_info_p,
 		     struct attrib *attr_list, Node_Id gnat_node)
 {
   tree subprog_decl = build_decl (input_location, FUNCTION_DECL, name, type);
@@ -3097,10 +3102,11 @@ create_subprog_decl (tree name, tree asm_name, tree type, tree param_decl_list,
   if (!debug_info_p)
     DECL_IGNORED_P (subprog_decl) = 1;
 
+  TREE_READONLY (subprog_decl) = TYPE_READONLY (type) | const_flag;
   TREE_PUBLIC (subprog_decl) = public_flag;
-  TREE_READONLY (subprog_decl) = TYPE_READONLY (type);
-  TREE_THIS_VOLATILE (subprog_decl) = TYPE_VOLATILE (type);
-  TREE_SIDE_EFFECTS (subprog_decl) = TYPE_VOLATILE (type);
+  TREE_SIDE_EFFECTS (subprog_decl)
+    = TREE_THIS_VOLATILE (subprog_decl)
+    = TYPE_VOLATILE (type) | volatile_flag;
 
   DECL_ARTIFICIAL (result_decl) = 1;
   DECL_IGNORED_P (result_decl) = 1;