Initial checkin of GCC 4.9.0 from trunk (r208799).

Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba

1 files changed, 136 insertions, 0 deletions

diff --git a/gcc-4.9/gcc/ada/exp_ch3.ads b/gcc-4.9/gcc/ada/exp_ch3.ads
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                              E X P _ C H 3                               --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2013, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
+-- for  more details.  You should have  received  a copy of the GNU General --
+-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license.          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  Expand routines for chapter 3 constructs
+
+with Types;  use Types;
+with Elists; use Elists;
+with Uintp;  use Uintp;
+
+package Exp_Ch3 is
+
+   procedure Expand_N_Object_Declaration         (N : Node_Id);
+   procedure Expand_N_Subtype_Indication         (N : Node_Id);
+   procedure Expand_N_Variant_Part               (N : Node_Id);
+   procedure Expand_N_Full_Type_Declaration      (N : Node_Id);
+
+   procedure Expand_Previous_Access_Type (Def_Id : Entity_Id);
+   --  For a full type declaration that contains tasks, or that is a task,
+   --  check whether there exists an access type whose designated type is an
+   --  incomplete declarations for the current composite type. If so, build the
+   --  master for that access type, now that it is known to denote an object
+   --  with tasks.
+
+   procedure Expand_Record_Extension (T : Entity_Id; Def : Node_Id);
+   --  Add a field _parent in the extension part of the record
+
+   procedure Build_Discr_Checking_Funcs (N : Node_Id);
+   --  Builds function which checks whether the component name is consistent
+   --  with the current discriminants. N is the full type declaration node,
+   --  and the discriminant checking functions are inserted after this node.
+
+   function Build_Initialization_Call
+     (Loc               : Source_Ptr;
+      Id_Ref            : Node_Id;
+      Typ               : Entity_Id;
+      In_Init_Proc      : Boolean := False;
+      Enclos_Type       : Entity_Id := Empty;
+      Discr_Map         : Elist_Id := New_Elmt_List;
+      With_Default_Init : Boolean := False;
+      Constructor_Ref   : Node_Id := Empty) return List_Id;
+   --  Builds a call to the initialization procedure for the base type of Typ,
+   --  passing it the object denoted by Id_Ref, plus additional parameters as
+   --  appropriate for the type (the _Master, for task types, for example).
+   --  Loc is the source location for the constructed tree. In_Init_Proc has
+   --  to be set to True when the call is itself in an init proc in order to
+   --  enable the use of discriminals. Enclos_Type is the enclosing type when
+   --  initializing a component in an outer init proc, and it is used for
+   --  various expansion cases including the case where Typ is a task type
+   --  which is an array component, the indexes of the enclosing type are
+   --  used to build the string that identifies each task at runtime.
+   --
+   --  Discr_Map is used to replace discriminants by their discriminals in
+   --  expressions used to constrain record components. In the presence of
+   --  entry families bounded by discriminants, protected type discriminants
+   --  can appear within expressions in array bounds (not as stand-alone
+   --  identifiers) and a general replacement is necessary.
+   --
+   --  Ada 2005 (AI-287): With_Default_Init is used to indicate that the
+   --  initialization call corresponds to a default initialized component
+   --  of an aggregate.
+   --
+   --  Constructor_Ref is a call to a constructor subprogram. It is currently
+   --  used only to support C++ constructors.
+
+   function Freeze_Type (N : Node_Id) return Boolean;
+   --  This function executes the freezing actions associated with the given
+   --  freeze type node N and returns True if the node is to be deleted. We
+   --  delete the node if it is present just for front end purpose and we don't
+   --  want Gigi to see the node. This function can't delete the node itself
+   --  since it would confuse any remaining processing of the freeze node.
+
+   procedure Init_Secondary_Tags
+     (Typ            : Entity_Id;
+      Target         : Node_Id;
+      Stmts_List     : List_Id;
+      Fixed_Comps    : Boolean := True;
+      Variable_Comps : Boolean := True);
+   --  Ada 2005 (AI-251): Initialize the tags of the secondary dispatch tables
+   --  of Typ. The generated code referencing tag fields of Target is appended
+   --  to Stmts_List. If Fixed_Comps is True then the tag components located at
+   --  fixed positions of Target are initialized; if Variable_Comps is True
+   --  then tags components located at variable positions of Target are
+   --  initialized.
+
+   function Needs_Simple_Initialization
+     (T           : Entity_Id;
+      Consider_IS : Boolean := True) return Boolean;
+   --  Certain types need initialization even though there is no specific
+   --  initialization routine:
+   --    Access types (which need initializing to null)
+   --    All scalar types if Normalize_Scalars mode set
+   --    Descendents of standard string types if Normalize_Scalars mode set
+   --    Scalar types having a Default_Value attribute
+   --  Regarding Initialize_Scalars mode, this is ignored if Consider_IS is
+   --  set to False, but if Consider_IS is set to True, then the cases above
+   --  mentioning Normalize_Scalars also apply for Initialize_Scalars mode.
+
+   function Get_Simple_Init_Val
+     (T    : Entity_Id;
+      N    : Node_Id;
+      Size : Uint := No_Uint) return Node_Id;
+   --  For a type which Needs_Simple_Initialization (see above), prepares the
+   --  tree for an expression representing the required initial value. N is a
+   --  node whose source location used in constructing this tree which is
+   --  returned as the result of the call. The Size parameter indicates the
+   --  target size of the object if it is known (indicated by a value that is
+   --  not No_Uint and is greater than zero). If Size is not given (Size set to
+   --  No_Uint, or non-positive), then the Esize of T is used as an estimate of
+   --  the Size. The object size is needed to prepare a known invalid value for
+   --  use by Normalize_Scalars. A call to this routine where T is a scalar
+   --  type is only valid if we are in Normalize_Scalars or Initialize_Scalars
+   --  mode, or if N is the node for a 'Invalid_Value attribute node.
+
+end Exp_Ch3;