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authorBen Cheng <bccheng@google.com>2014-03-25 22:37:19 -0700
committerBen Cheng <bccheng@google.com>2014-03-25 22:37:19 -0700
commit1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch)
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parent283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff)
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Initial checkin of GCC 4.9.0 from trunk (r208799).
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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;