1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- I N L I N E -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2012, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNAT; see file COPYING3. If not, go to -- 19-- http://www.gnu.org/licenses for a complete copy of the license. -- 20-- -- 21-- GNAT was originally developed by the GNAT team at New York University. -- 22-- Extensive contributions were provided by Ada Core Technologies Inc. -- 23-- -- 24------------------------------------------------------------------------------ 25 26-- This module handles two kinds of inlining activity: 27 28-- a) Instantiation of generic bodies. This is done unconditionally, after 29-- analysis and expansion of the main unit. 30 31-- b) Compilation of unit bodies that contain the bodies of inlined sub- 32-- programs. This is done only if inlining is enabled (-gnatn). Full inlining 33-- requires that a) an b) be mutually recursive, because each step may 34-- generate another generic expansion and further inlined calls. For now each 35-- of them uses a workpile algorithm, but they are called independently from 36-- Frontend, and thus are not mutually recursive. 37 38with Alloc; 39with Opt; use Opt; 40with Sem; use Sem; 41with Table; 42with Types; use Types; 43 44package Inline is 45 46 -------------------------------- 47 -- Generic Body Instantiation -- 48 -------------------------------- 49 50 -- The bodies of generic instantiations are built after semantic analysis 51 -- of the main unit is complete. Generic instantiations are saved in a 52 -- global data structure, and the bodies constructed by means of a separate 53 -- analysis and expansion step. 54 55 -- See full description in body of Sem_Ch12 for more details 56 57 type Pending_Body_Info is record 58 Inst_Node : Node_Id; 59 -- Node for instantiation that requires the body 60 61 Act_Decl : Node_Id; 62 -- Declaration for package or subprogram spec for instantiation 63 64 Expander_Status : Boolean; 65 -- If the body is instantiated only for semantic checking, expansion 66 -- must be inhibited. 67 68 Current_Sem_Unit : Unit_Number_Type; 69 -- The semantic unit within which the instantiation is found. Must 70 -- be restored when compiling the body, to insure that internal enti- 71 -- ties use the same counter and are unique over spec and body. 72 73 Scope_Suppress : Suppress_Record; 74 Local_Suppress_Stack_Top : Suppress_Stack_Entry_Ptr; 75 -- Save suppress information at the point of instantiation. Used to 76 -- properly inherit check status active at this point (see RM 11.5 77 -- (7.2/2), AI95-00224-01): 78 -- 79 -- "If a checking pragma applies to a generic instantiation, then the 80 -- checking pragma also applies to the instance. If a checking pragma 81 -- applies to a call to a subprogram that has a pragma Inline applied 82 -- to it, then the checking pragma also applies to the inlined 83 -- subprogram body". 84 -- 85 -- This means we have to capture this information from the current scope 86 -- at the point of instantiation. 87 88 Version : Ada_Version_Type; 89 -- The body must be compiled with the same language version as the 90 -- spec. The version may be set by a configuration pragma in a separate 91 -- file or in the current file, and may differ from body to body. 92 end record; 93 94 package Pending_Instantiations is new Table.Table ( 95 Table_Component_Type => Pending_Body_Info, 96 Table_Index_Type => Int, 97 Table_Low_Bound => 0, 98 Table_Initial => Alloc.Pending_Instantiations_Initial, 99 Table_Increment => Alloc.Pending_Instantiations_Increment, 100 Table_Name => "Pending_Instantiations"); 101 102 -- The following table records subprograms and packages for which 103 -- generation of subprogram descriptors must be delayed. 104 105 package Pending_Descriptor is new Table.Table ( 106 Table_Component_Type => Entity_Id, 107 Table_Index_Type => Int, 108 Table_Low_Bound => 0, 109 Table_Initial => Alloc.Pending_Instantiations_Initial, 110 Table_Increment => Alloc.Pending_Instantiations_Increment, 111 Table_Name => "Pending_Descriptor"); 112 113 ----------------- 114 -- Subprograms -- 115 ----------------- 116 117 procedure Initialize; 118 -- Initialize internal tables 119 120 procedure Lock; 121 -- Lock internal tables before calling backend 122 123 procedure Instantiate_Bodies; 124 -- This procedure is called after semantic analysis is complete, to 125 -- instantiate the bodies of generic instantiations that appear in the 126 -- compilation unit. 127 128 procedure Add_Inlined_Body (E : Entity_Id); 129 -- E is an inlined subprogram appearing in a call, either explicitly, or 130 -- a discriminant check for which gigi builds a call. Add E's enclosing 131 -- unit to Inlined_Bodies so that body of E can be subsequently retrieved 132 -- and analyzed. 133 134 procedure Analyze_Inlined_Bodies; 135 -- At end of compilation, analyze the bodies of all units that contain 136 -- inlined subprograms that are actually called. 137 138 procedure Check_Body_For_Inlining (N : Node_Id; P : Entity_Id); 139 -- If front-end inlining is enabled and a package declaration contains 140 -- inlined subprograms, load and compile the package body to collect the 141 -- bodies of these subprograms, so they are available to inline calls. 142 -- N is the compilation unit for the package. 143 144 procedure Remove_Dead_Instance (N : Node_Id); 145 -- If an instantiation appears in unreachable code, delete the pending 146 -- body instance. 147 148end Inline; 149