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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- I N L I N E --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2010, 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. --
-- --
------------------------------------------------------------------------------
-- This module handles two kinds of inlining activity:
-- a) Instantiation of generic bodies. This is done unconditionally, after
-- analysis and expansion of the main unit.
-- b) Compilation of unit bodies that contain the bodies of inlined sub-
-- programs. This is done only if inlining is enabled (-gnatn). Full inlining
-- requires that a) an b) be mutually recursive, because each step may
-- generate another generic expansion and further inlined calls. For now each
-- of them uses a workpile algorithm, but they are called independently from
-- Frontend, and thus are not mutually recursive.
with Alloc;
with Opt; use Opt;
with Sem; use Sem;
with Table;
with Types; use Types;
package Inline is
--------------------------------
-- Generic Body Instantiation --
--------------------------------
-- The bodies of generic instantiations are built after semantic analysis
-- of the main unit is complete. Generic instantiations are saved in a
-- global data structure, and the bodies constructed by means of a separate
-- analysis and expansion step.
-- See full description in body of Sem_Ch12 for more details
type Pending_Body_Info is record
Inst_Node : Node_Id;
-- Node for instantiation that requires the body
Act_Decl : Node_Id;
-- Declaration for package or subprogram spec for instantiation
Expander_Status : Boolean;
-- If the body is instantiated only for semantic checking, expansion
-- must be inhibited.
Current_Sem_Unit : Unit_Number_Type;
-- The semantic unit within which the instantiation is found. Must
-- be restored when compiling the body, to insure that internal enti-
-- ties use the same counter and are unique over spec and body.
Scope_Suppress : Suppress_Array;
Local_Suppress_Stack_Top : Suppress_Stack_Entry_Ptr;
-- Save suppress information at the point of instantiation. Used to
-- properly inherit check status active at this point (see RM 11.5
-- (7.2/2), AI95-00224-01):
--
-- "If a checking pragma applies to a generic instantiation, then the
-- checking pragma also applies to the instance. If a checking pragma
-- applies to a call to a subprogram that has a pragma Inline applied
-- to it, then the checking pragma also applies to the inlined
-- subprogram body".
--
-- This means we have to capture this information from the current scope
-- at the point of instantiation.
Version : Ada_Version_Type;
-- The body must be compiled with the same language version as the
-- spec. The version may be set by a configuration pragma in a separate
-- file or in the current file, and may differ from body to body.
end record;
package Pending_Instantiations is new Table.Table (
Table_Component_Type => Pending_Body_Info,
Table_Index_Type => Int,
Table_Low_Bound => 0,
Table_Initial => Alloc.Pending_Instantiations_Initial,
Table_Increment => Alloc.Pending_Instantiations_Increment,
Table_Name => "Pending_Instantiations");
-- The following table records subprograms and packages for which
-- generation of subprogram descriptors must be delayed.
package Pending_Descriptor is new Table.Table (
Table_Component_Type => Entity_Id,
Table_Index_Type => Int,
Table_Low_Bound => 0,
Table_Initial => Alloc.Pending_Instantiations_Initial,
Table_Increment => Alloc.Pending_Instantiations_Increment,
Table_Name => "Pending_Descriptor");
Analyzing_Inlined_Bodies : Boolean;
-- This flag is set False by the call to Initialize, and then is set
-- True by the call to Analyze_Inlined_Bodies. It is used to suppress
-- generation of subprogram descriptors for inlined bodies.
-----------------
-- Subprograms --
-----------------
procedure Initialize;
-- Initialize internal tables
procedure Lock;
-- Lock internal tables before calling backend
procedure Instantiate_Bodies;
-- This procedure is called after semantic analysis is complete, to
-- instantiate the bodies of generic instantiations that appear in the
-- compilation unit.
procedure Add_Inlined_Body (E : Entity_Id);
-- E is an inlined subprogram appearing in a call, either explicitly, or
-- a discriminant check for which gigi builds a call. Add E's enclosing
-- unit to Inlined_Bodies so that body of E can be subsequently retrieved
-- and analyzed.
procedure Analyze_Inlined_Bodies;
-- At end of compilation, analyze the bodies of all units that contain
-- inlined subprograms that are actually called.
procedure Check_Body_For_Inlining (N : Node_Id; P : Entity_Id);
-- If front-end inlining is enabled and a package declaration contains
-- inlined subprograms, load and compile the package body to collect the
-- bodies of these subprograms, so they are available to inline calls.
-- N is the compilation unit for the package.
procedure Remove_Dead_Instance (N : Node_Id);
-- If an instantiation appears in unreachable code, delete the pending
-- body instance.
end Inline;
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