1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2008, Free Software Foundation, Inc. --
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. --
21 -- GNAT was originally developed by the GNAT team at New York University. --
22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
24 ------------------------------------------------------------------------------
26 with Atree; use Atree;
27 with Einfo; use Einfo;
28 with Elists; use Elists;
29 with Errout; use Errout;
30 with Exp_Ch7; use Exp_Ch7;
31 with Exp_Tss; use Exp_Tss;
32 with Fname; use Fname;
33 with Fname.UF; use Fname.UF;
35 with Namet; use Namet;
36 with Nlists; use Nlists;
38 with Sem_Ch8; use Sem_Ch8;
39 with Sem_Ch10; use Sem_Ch10;
40 with Sem_Ch12; use Sem_Ch12;
41 with Sem_Util; use Sem_Util;
42 with Sinfo; use Sinfo;
43 with Snames; use Snames;
44 with Stand; use Stand;
45 with Uname; use Uname;
47 package body Inline is
53 -- Inlined functions are actually placed in line by the backend if the
54 -- corresponding bodies are available (i.e. compiled). Whenever we find
55 -- a call to an inlined subprogram, we add the name of the enclosing
56 -- compilation unit to a worklist. After all compilation, and after
57 -- expansion of generic bodies, we traverse the list of pending bodies
58 -- and compile them as well.
60 package Inlined_Bodies is new Table.Table (
61 Table_Component_Type => Entity_Id,
62 Table_Index_Type => Int,
64 Table_Initial => Alloc.Inlined_Bodies_Initial,
65 Table_Increment => Alloc.Inlined_Bodies_Increment,
66 Table_Name => "Inlined_Bodies");
68 -----------------------
69 -- Inline Processing --
70 -----------------------
72 -- For each call to an inlined subprogram, we make entries in a table
73 -- that stores caller and callee, and indicates a prerequisite from
74 -- one to the other. We also record the compilation unit that contains
75 -- the callee. After analyzing the bodies of all such compilation units,
76 -- we produce a list of subprograms in topological order, for use by the
77 -- back-end. If P2 is a prerequisite of P1, then P1 calls P2, and for
78 -- proper inlining the back-end must analyze the body of P2 before that of
79 -- P1. The code below guarantees that the transitive closure of inlined
80 -- subprograms called from the main compilation unit is made available to
81 -- the code generator.
83 Last_Inlined : Entity_Id := Empty;
85 -- For each entry in the table we keep a list of successors in topological
86 -- order, i.e. callers of the current subprogram.
88 type Subp_Index is new Nat;
89 No_Subp : constant Subp_Index := 0;
91 -- The subprogram entities are hashed into the Inlined table
93 Num_Hash_Headers : constant := 512;
95 Hash_Headers : array (Subp_Index range 0 .. Num_Hash_Headers - 1)
98 type Succ_Index is new Nat;
99 No_Succ : constant Succ_Index := 0;
101 type Succ_Info is record
106 -- The following table stores list elements for the successor lists.
107 -- These lists cannot be chained directly through entries in the Inlined
108 -- table, because a given subprogram can appear in several such lists.
110 package Successors is new Table.Table (
111 Table_Component_Type => Succ_Info,
112 Table_Index_Type => Succ_Index,
113 Table_Low_Bound => 1,
114 Table_Initial => Alloc.Successors_Initial,
115 Table_Increment => Alloc.Successors_Increment,
116 Table_Name => "Successors");
118 type Subp_Info is record
119 Name : Entity_Id := Empty;
120 First_Succ : Succ_Index := No_Succ;
121 Count : Integer := 0;
122 Listed : Boolean := False;
123 Main_Call : Boolean := False;
124 Next : Subp_Index := No_Subp;
125 Next_Nopred : Subp_Index := No_Subp;
128 package Inlined is new Table.Table (
129 Table_Component_Type => Subp_Info,
130 Table_Index_Type => Subp_Index,
131 Table_Low_Bound => 1,
132 Table_Initial => Alloc.Inlined_Initial,
133 Table_Increment => Alloc.Inlined_Increment,
134 Table_Name => "Inlined");
136 -----------------------
137 -- Local Subprograms --
138 -----------------------
140 function Scope_In_Main_Unit (Scop : Entity_Id) return Boolean;
141 -- Return True if Scop is in the main unit or its spec, or in a
142 -- parent of the main unit if it is a child unit.
144 procedure Add_Call (Called : Entity_Id; Caller : Entity_Id := Empty);
145 -- Make two entries in Inlined table, for an inlined subprogram being
146 -- called, and for the inlined subprogram that contains the call. If
147 -- the call is in the main compilation unit, Caller is Empty.
149 function Add_Subp (E : Entity_Id) return Subp_Index;
150 -- Make entry in Inlined table for subprogram E, or return table index
151 -- that already holds E.
153 function Has_Initialized_Type (E : Entity_Id) return Boolean;
154 -- If a candidate for inlining contains type declarations for types with
155 -- non-trivial initialization procedures, they are not worth inlining.
157 function Is_Nested (E : Entity_Id) return Boolean;
158 -- If the function is nested inside some other function, it will
159 -- always be compiled if that function is, so don't add it to the
160 -- inline list. We cannot compile a nested function outside the
161 -- scope of the containing function anyway. This is also the case if
162 -- the function is defined in a task body or within an entry (for
163 -- example, an initialization procedure).
165 procedure Add_Inlined_Subprogram (Index : Subp_Index);
166 -- Add subprogram to Inlined List once all of its predecessors have been
167 -- placed on the list. Decrement the count of all its successors, and
168 -- add them to list (recursively) if count drops to zero.
170 ------------------------------
171 -- Deferred Cleanup Actions --
172 ------------------------------
174 -- The cleanup actions for scopes that contain instantiations is delayed
175 -- until after expansion of those instantiations, because they may
176 -- contain finalizable objects or tasks that affect the cleanup code.
177 -- A scope that contains instantiations only needs to be finalized once,
178 -- even if it contains more than one instance. We keep a list of scopes
179 -- that must still be finalized, and call cleanup_actions after all the
180 -- instantiations have been completed.
184 procedure Add_Scope_To_Clean (Inst : Entity_Id);
185 -- Build set of scopes on which cleanup actions must be performed
187 procedure Cleanup_Scopes;
188 -- Complete cleanup actions on scopes that need it
194 procedure Add_Call (Called : Entity_Id; Caller : Entity_Id := Empty) is
195 P1 : constant Subp_Index := Add_Subp (Called);
200 if Present (Caller) then
201 P2 := Add_Subp (Caller);
203 -- Add P2 to the list of successors of P1, if not already there.
204 -- Note that P2 may contain more than one call to P1, and only
205 -- one needs to be recorded.
207 J := Inlined.Table (P1).First_Succ;
209 while J /= No_Succ loop
211 if Successors.Table (J).Subp = P2 then
215 J := Successors.Table (J).Next;
218 -- On exit, make a successor entry for P2
220 Successors.Increment_Last;
221 Successors.Table (Successors.Last).Subp := P2;
222 Successors.Table (Successors.Last).Next :=
223 Inlined.Table (P1).First_Succ;
224 Inlined.Table (P1).First_Succ := Successors.Last;
226 Inlined.Table (P2).Count := Inlined.Table (P2).Count + 1;
229 Inlined.Table (P1).Main_Call := True;
233 ----------------------
234 -- Add_Inlined_Body --
235 ----------------------
237 procedure Add_Inlined_Body (E : Entity_Id) is
240 function Must_Inline return Boolean;
241 -- Inlining is only done if the call statement N is in the main unit,
242 -- or within the body of another inlined subprogram.
248 function Must_Inline return Boolean is
253 -- Check if call is in main unit
255 Scop := Current_Scope;
257 -- Do not try to inline if scope is standard. This could happen, for
258 -- example, for a call to Add_Global_Declaration, and it causes
259 -- trouble to try to inline at this level.
261 if Scop = Standard_Standard then
265 -- Otherwise lookup scope stack to outer scope
267 while Scope (Scop) /= Standard_Standard
268 and then not Is_Child_Unit (Scop)
270 Scop := Scope (Scop);
273 Comp := Parent (Scop);
274 while Nkind (Comp) /= N_Compilation_Unit loop
275 Comp := Parent (Comp);
278 if Comp = Cunit (Main_Unit)
279 or else Comp = Library_Unit (Cunit (Main_Unit))
285 -- Call is not in main unit. See if it's in some inlined subprogram
287 Scop := Current_Scope;
288 while Scope (Scop) /= Standard_Standard
289 and then not Is_Child_Unit (Scop)
291 if Is_Overloadable (Scop)
292 and then Is_Inlined (Scop)
298 Scop := Scope (Scop);
304 -- Start of processing for Add_Inlined_Body
307 -- Find unit containing E, and add to list of inlined bodies if needed.
308 -- If the body is already present, no need to load any other unit. This
309 -- is the case for an initialization procedure, which appears in the
310 -- package declaration that contains the type. It is also the case if
311 -- the body has already been analyzed. Finally, if the unit enclosing
312 -- E is an instance, the instance body will be analyzed in any case,
313 -- and there is no need to add the enclosing unit (whose body might not
316 -- Library-level functions must be handled specially, because there is
317 -- no enclosing package to retrieve. In this case, it is the body of
318 -- the function that will have to be loaded.
320 if not Is_Abstract_Subprogram (E) and then not Is_Nested (E)
321 and then Convention (E) /= Convention_Protected
326 and then Ekind (Pack) = E_Package
330 if Pack = Standard_Standard then
332 -- Library-level inlined function. Add function itself to
333 -- list of needed units.
335 Inlined_Bodies.Increment_Last;
336 Inlined_Bodies.Table (Inlined_Bodies.Last) := E;
338 elsif Is_Generic_Instance (Pack) then
341 elsif not Is_Inlined (Pack)
342 and then not Has_Completion (E)
343 and then not Scope_In_Main_Unit (Pack)
345 Set_Is_Inlined (Pack);
346 Inlined_Bodies.Increment_Last;
347 Inlined_Bodies.Table (Inlined_Bodies.Last) := Pack;
351 end Add_Inlined_Body;
353 ----------------------------
354 -- Add_Inlined_Subprogram --
355 ----------------------------
357 procedure Add_Inlined_Subprogram (Index : Subp_Index) is
358 E : constant Entity_Id := Inlined.Table (Index).Name;
362 function Back_End_Cannot_Inline (Subp : Entity_Id) return Boolean;
363 -- There are various conditions under which back-end inlining cannot
366 -- a) If a body has handlers, it must not be inlined, because this
367 -- may violate program semantics, and because in zero-cost exception
368 -- mode it will lead to undefined symbols at link time.
370 -- b) If a body contains inlined function instances, it cannot be
371 -- inlined under ZCX because the numeric suffix generated by gigi
372 -- will be different in the body and the place of the inlined call.
374 -- If the body to be inlined contains calls to subprograms declared
375 -- in the same body that have no previous spec, the back-end cannot
376 -- inline either because the bodies to be inlined are processed before
377 -- the rest of the enclosing package body, and gigi will then find
378 -- references to entities that have not been elaborated yet.
380 -- This procedure must be carefully coordinated with the back end.
382 ----------------------------
383 -- Back_End_Cannot_Inline --
384 ----------------------------
386 function Back_End_Cannot_Inline (Subp : Entity_Id) return Boolean is
387 Decl : constant Node_Id := Unit_Declaration_Node (Subp);
388 Body_Ent : Entity_Id;
392 function Process (N : Node_Id) return Traverse_Result;
393 -- Look for calls to subprograms with no previous spec, declared
394 -- in the same enclosiong package body.
400 function Process (N : Node_Id) return Traverse_Result is
402 if Nkind (N) = N_Procedure_Call_Statement
403 or else Nkind (N) = N_Function_Call
405 if Is_Entity_Name (Name (N))
407 Nkind (Unit_Declaration_Node (Entity (Name (N))))
409 and then In_Same_Extended_Unit (Subp, Entity (Name (N)))
421 function Has_Exposed_Call is new Traverse_Func (Process);
423 -- Start of processing for Back_End_Cannot_Inline
426 if Nkind (Decl) = N_Subprogram_Declaration
427 and then Present (Corresponding_Body (Decl))
429 Body_Ent := Corresponding_Body (Decl);
434 -- If subprogram is marked Inline_Always, inlining is mandatory
436 if Has_Pragma_Inline_Always (Subp) then
442 (Handled_Statement_Sequence
443 (Unit_Declaration_Node (Corresponding_Body (Decl)))))
448 Ent := First_Entity (Body_Ent);
449 while Present (Ent) loop
450 if Is_Subprogram (Ent)
451 and then Is_Generic_Instance (Ent)
460 (Unit_Declaration_Node (Corresponding_Body (Decl))) = Abandon
462 if Ineffective_Inline_Warnings then
464 ("?call to subprogram with no separate spec"
465 & " prevents inlining!!", Bad_Call);
472 end Back_End_Cannot_Inline;
474 -- Start of processing for Add_Inlined_Subprogram
477 -- Insert the current subprogram in the list of inlined subprograms,
478 -- if it can actually be inlined by the back-end.
480 if not Scope_In_Main_Unit (E)
481 and then Is_Inlined (E)
482 and then not Is_Nested (E)
483 and then not Has_Initialized_Type (E)
485 if Back_End_Cannot_Inline (E) then
486 Set_Is_Inlined (E, False);
489 if No (Last_Inlined) then
490 Set_First_Inlined_Subprogram (Cunit (Main_Unit), E);
492 Set_Next_Inlined_Subprogram (Last_Inlined, E);
499 Inlined.Table (Index).Listed := True;
501 Succ := Inlined.Table (Index).First_Succ;
502 while Succ /= No_Succ loop
503 Subp := Successors.Table (Succ).Subp;
504 Inlined.Table (Subp).Count := Inlined.Table (Subp).Count - 1;
506 if Inlined.Table (Subp).Count = 0 then
507 Add_Inlined_Subprogram (Subp);
510 Succ := Successors.Table (Succ).Next;
512 end Add_Inlined_Subprogram;
514 ------------------------
515 -- Add_Scope_To_Clean --
516 ------------------------
518 procedure Add_Scope_To_Clean (Inst : Entity_Id) is
519 Scop : constant Entity_Id := Enclosing_Dynamic_Scope (Inst);
523 -- If the instance appears in a library-level package declaration,
524 -- all finalization is global, and nothing needs doing here.
526 if Scop = Standard_Standard then
530 -- If the instance appears within a generic subprogram there is nothing
531 -- to finalize either.
537 while Present (S) and then S /= Standard_Standard loop
538 if Is_Generic_Subprogram (S) then
546 Elmt := First_Elmt (To_Clean);
548 while Present (Elmt) loop
550 if Node (Elmt) = Scop then
554 Elmt := Next_Elmt (Elmt);
557 Append_Elmt (Scop, To_Clean);
558 end Add_Scope_To_Clean;
564 function Add_Subp (E : Entity_Id) return Subp_Index is
565 Index : Subp_Index := Subp_Index (E) mod Num_Hash_Headers;
569 -- Initialize entry in Inlined table
571 procedure New_Entry is
573 Inlined.Increment_Last;
574 Inlined.Table (Inlined.Last).Name := E;
575 Inlined.Table (Inlined.Last).First_Succ := No_Succ;
576 Inlined.Table (Inlined.Last).Count := 0;
577 Inlined.Table (Inlined.Last).Listed := False;
578 Inlined.Table (Inlined.Last).Main_Call := False;
579 Inlined.Table (Inlined.Last).Next := No_Subp;
580 Inlined.Table (Inlined.Last).Next_Nopred := No_Subp;
583 -- Start of processing for Add_Subp
586 if Hash_Headers (Index) = No_Subp then
588 Hash_Headers (Index) := Inlined.Last;
592 J := Hash_Headers (Index);
594 while J /= No_Subp loop
596 if Inlined.Table (J).Name = E then
600 J := Inlined.Table (J).Next;
604 -- On exit, subprogram was not found. Enter in table. Index is
605 -- the current last entry on the hash chain.
608 Inlined.Table (Index).Next := Inlined.Last;
613 ----------------------------
614 -- Analyze_Inlined_Bodies --
615 ----------------------------
617 procedure Analyze_Inlined_Bodies is
624 Analyzing_Inlined_Bodies := False;
626 if Serious_Errors_Detected = 0 then
627 Push_Scope (Standard_Standard);
630 while J <= Inlined_Bodies.Last
631 and then Serious_Errors_Detected = 0
633 Pack := Inlined_Bodies.Table (J);
636 and then Scope (Pack) /= Standard_Standard
637 and then not Is_Child_Unit (Pack)
639 Pack := Scope (Pack);
642 Comp_Unit := Parent (Pack);
643 while Present (Comp_Unit)
644 and then Nkind (Comp_Unit) /= N_Compilation_Unit
646 Comp_Unit := Parent (Comp_Unit);
649 -- Load the body, unless it the main unit, or is an instance
650 -- whose body has already been analyzed.
652 if Present (Comp_Unit)
653 and then Comp_Unit /= Cunit (Main_Unit)
654 and then Body_Required (Comp_Unit)
655 and then (Nkind (Unit (Comp_Unit)) /= N_Package_Declaration
656 or else No (Corresponding_Body (Unit (Comp_Unit))))
659 Bname : constant Unit_Name_Type :=
660 Get_Body_Name (Get_Unit_Name (Unit (Comp_Unit)));
665 if not Is_Loaded (Bname) then
666 Load_Needed_Body (Comp_Unit, OK);
670 -- Warn that a body was not available for inlining
673 Error_Msg_Unit_1 := Bname;
675 ("one or more inlined subprograms accessed in $!?",
678 Get_File_Name (Bname, Subunit => False);
679 Error_Msg_N ("\but file{ was not found!?", Comp_Unit);
688 -- The analysis of required bodies may have produced additional
689 -- generic instantiations. To obtain further inlining, we perform
690 -- another round of generic body instantiations. Establishing a
691 -- fully recursive loop between inlining and generic instantiations
692 -- is unlikely to yield more than this one additional pass.
696 -- The list of inlined subprograms is an overestimate, because
697 -- it includes inlined functions called from functions that are
698 -- compiled as part of an inlined package, but are not themselves
699 -- called. An accurate computation of just those subprograms that
700 -- are needed requires that we perform a transitive closure over
701 -- the call graph, starting from calls in the main program. Here
702 -- we do one step of the inverse transitive closure, and reset
703 -- the Is_Called flag on subprograms all of whose callers are not.
705 for Index in Inlined.First .. Inlined.Last loop
706 S := Inlined.Table (Index).First_Succ;
709 and then not Inlined.Table (Index).Main_Call
711 Set_Is_Called (Inlined.Table (Index).Name, False);
713 while S /= No_Succ loop
716 (Inlined.Table (Successors.Table (S).Subp).Name)
717 or else Inlined.Table (Successors.Table (S).Subp).Main_Call
719 Set_Is_Called (Inlined.Table (Index).Name);
723 S := Successors.Table (S).Next;
728 -- Now that the units are compiled, chain the subprograms within
729 -- that are called and inlined. Produce list of inlined subprograms
730 -- sorted in topological order. Start with all subprograms that
731 -- have no prerequisites, i.e. inlined subprograms that do not call
732 -- other inlined subprograms.
734 for Index in Inlined.First .. Inlined.Last loop
736 if Is_Called (Inlined.Table (Index).Name)
737 and then Inlined.Table (Index).Count = 0
738 and then not Inlined.Table (Index).Listed
740 Add_Inlined_Subprogram (Index);
744 -- Because Add_Inlined_Subprogram treats recursively nodes that have
745 -- no prerequisites left, at the end of the loop all subprograms
746 -- must have been listed. If there are any unlisted subprograms
747 -- left, there must be some recursive chains that cannot be inlined.
749 for Index in Inlined.First .. Inlined.Last loop
750 if Is_Called (Inlined.Table (Index).Name)
751 and then Inlined.Table (Index).Count /= 0
752 and then not Is_Predefined_File_Name
754 (Get_Source_Unit (Inlined.Table (Index).Name)))
757 ("& cannot be inlined?", Inlined.Table (Index).Name);
759 -- A warning on the first one might be sufficient ???
765 end Analyze_Inlined_Bodies;
767 -----------------------------
768 -- Check_Body_For_Inlining --
769 -----------------------------
771 procedure Check_Body_For_Inlining (N : Node_Id; P : Entity_Id) is
772 Bname : Unit_Name_Type;
777 if Is_Compilation_Unit (P)
778 and then not Is_Generic_Instance (P)
780 Bname := Get_Body_Name (Get_Unit_Name (Unit (N)));
781 E := First_Entity (P);
783 while Present (E) loop
784 if Has_Pragma_Inline_Always (E)
785 or else (Front_End_Inlining and then Has_Pragma_Inline (E))
787 if not Is_Loaded (Bname) then
788 Load_Needed_Body (N, OK);
792 -- Check that we are not trying to inline a parent
793 -- whose body depends on a child, when we are compiling
794 -- the body of the child. Otherwise we have a potential
795 -- elaboration circularity with inlined subprograms and
796 -- with Taft-Amendment types.
799 Comp : Node_Id; -- Body just compiled
800 Child_Spec : Entity_Id; -- Spec of main unit
801 Ent : Entity_Id; -- For iteration
802 With_Clause : Node_Id; -- Context of body.
805 if Nkind (Unit (Cunit (Main_Unit))) = N_Package_Body
806 and then Present (Body_Entity (P))
810 (Unit (Library_Unit (Cunit (Main_Unit)))));
813 Parent (Unit_Declaration_Node (Body_Entity (P)));
815 With_Clause := First (Context_Items (Comp));
817 -- Check whether the context of the body just
818 -- compiled includes a child of itself, and that
819 -- child is the spec of the main compilation.
821 while Present (With_Clause) loop
822 if Nkind (With_Clause) = N_With_Clause
824 Scope (Entity (Name (With_Clause))) = P
826 Entity (Name (With_Clause)) = Child_Spec
828 Error_Msg_Node_2 := Child_Spec;
830 ("body of & depends on child unit&?",
833 ("\subprograms in body cannot be inlined?",
836 -- Disable further inlining from this unit,
837 -- and keep Taft-amendment types incomplete.
839 Ent := First_Entity (P);
841 while Present (Ent) loop
843 and then Has_Completion_In_Body (Ent)
845 Set_Full_View (Ent, Empty);
847 elsif Is_Subprogram (Ent) then
848 Set_Is_Inlined (Ent, False);
862 elsif Ineffective_Inline_Warnings then
863 Error_Msg_Unit_1 := Bname;
865 ("unable to inline subprograms defined in $?", P);
866 Error_Msg_N ("\body not found?", P);
877 end Check_Body_For_Inlining;
883 procedure Cleanup_Scopes is
889 Elmt := First_Elmt (To_Clean);
891 while Present (Elmt) loop
894 if Ekind (Scop) = E_Entry then
895 Scop := Protected_Body_Subprogram (Scop);
897 elsif Is_Subprogram (Scop)
898 and then Is_Protected_Type (Scope (Scop))
899 and then Present (Protected_Body_Subprogram (Scop))
901 -- If a protected operation contains an instance, its
902 -- cleanup operations have been delayed, and the subprogram
903 -- has been rewritten in the expansion of the enclosing
904 -- protected body. It is the corresponding subprogram that
905 -- may require the cleanup operations, so propagate the
906 -- information that triggers cleanup activity.
909 (Protected_Body_Subprogram (Scop),
910 Uses_Sec_Stack (Scop));
911 Set_Finalization_Chain_Entity
912 (Protected_Body_Subprogram (Scop),
913 Finalization_Chain_Entity (Scop));
914 Scop := Protected_Body_Subprogram (Scop);
917 if Ekind (Scop) = E_Block then
918 Decl := Parent (Block_Node (Scop));
921 Decl := Unit_Declaration_Node (Scop);
923 if Nkind (Decl) = N_Subprogram_Declaration
924 or else Nkind (Decl) = N_Task_Type_Declaration
925 or else Nkind (Decl) = N_Subprogram_Body_Stub
927 Decl := Unit_Declaration_Node (Corresponding_Body (Decl));
932 Expand_Cleanup_Actions (Decl);
935 Elmt := Next_Elmt (Elmt);
939 --------------------------
940 -- Has_Initialized_Type --
941 --------------------------
943 function Has_Initialized_Type (E : Entity_Id) return Boolean is
944 E_Body : constant Node_Id := Get_Subprogram_Body (E);
948 if No (E_Body) then -- imported subprogram
952 Decl := First (Declarations (E_Body));
954 while Present (Decl) loop
956 if Nkind (Decl) = N_Full_Type_Declaration
957 and then Present (Init_Proc (Defining_Identifier (Decl)))
967 end Has_Initialized_Type;
973 procedure Initialize is
975 Analyzing_Inlined_Bodies := False;
976 Pending_Descriptor.Init;
977 Pending_Instantiations.Init;
982 for J in Hash_Headers'Range loop
983 Hash_Headers (J) := No_Subp;
987 ------------------------
988 -- Instantiate_Bodies --
989 ------------------------
991 -- Generic bodies contain all the non-local references, so an
992 -- instantiation does not need any more context than Standard
993 -- itself, even if the instantiation appears in an inner scope.
994 -- Generic associations have verified that the contract model is
995 -- satisfied, so that any error that may occur in the analysis of
996 -- the body is an internal error.
998 procedure Instantiate_Bodies is
1000 Info : Pending_Body_Info;
1003 if Serious_Errors_Detected = 0 then
1005 Expander_Active := (Operating_Mode = Opt.Generate_Code);
1006 Push_Scope (Standard_Standard);
1007 To_Clean := New_Elmt_List;
1009 if Is_Generic_Unit (Cunit_Entity (Main_Unit)) then
1013 -- A body instantiation may generate additional instantiations, so
1014 -- the following loop must scan to the end of a possibly expanding
1015 -- set (that's why we can't simply use a FOR loop here).
1018 while J <= Pending_Instantiations.Last
1019 and then Serious_Errors_Detected = 0
1021 Info := Pending_Instantiations.Table (J);
1023 -- If the instantiation node is absent, it has been removed
1024 -- as part of unreachable code.
1026 if No (Info.Inst_Node) then
1029 elsif Nkind (Info.Act_Decl) = N_Package_Declaration then
1030 Instantiate_Package_Body (Info);
1031 Add_Scope_To_Clean (Defining_Entity (Info.Act_Decl));
1034 Instantiate_Subprogram_Body (Info);
1040 -- Reset the table of instantiations. Additional instantiations
1041 -- may be added through inlining, when additional bodies are
1044 Pending_Instantiations.Init;
1046 -- We can now complete the cleanup actions of scopes that contain
1047 -- pending instantiations (skipped for generic units, since we
1048 -- never need any cleanups in generic units).
1049 -- pending instantiations.
1052 and then not Is_Generic_Unit (Main_Unit_Entity)
1055 elsif Is_Generic_Unit (Cunit_Entity (Main_Unit)) then
1061 end Instantiate_Bodies;
1067 function Is_Nested (E : Entity_Id) return Boolean is
1068 Scop : Entity_Id := Scope (E);
1071 while Scop /= Standard_Standard loop
1072 if Ekind (Scop) in Subprogram_Kind then
1075 elsif Ekind (Scop) = E_Task_Type
1076 or else Ekind (Scop) = E_Entry
1077 or else Ekind (Scop) = E_Entry_Family then
1081 Scop := Scope (Scop);
1093 Pending_Instantiations.Locked := True;
1094 Inlined_Bodies.Locked := True;
1095 Successors.Locked := True;
1096 Inlined.Locked := True;
1097 Pending_Instantiations.Release;
1098 Inlined_Bodies.Release;
1103 --------------------------
1104 -- Remove_Dead_Instance --
1105 --------------------------
1107 procedure Remove_Dead_Instance (N : Node_Id) is
1113 while J <= Pending_Instantiations.Last loop
1115 if Pending_Instantiations.Table (J).Inst_Node = N then
1116 Pending_Instantiations.Table (J).Inst_Node := Empty;
1122 end Remove_Dead_Instance;
1124 ------------------------
1125 -- Scope_In_Main_Unit --
1126 ------------------------
1128 function Scope_In_Main_Unit (Scop : Entity_Id) return Boolean is
1130 S : Entity_Id := Scop;
1131 Ent : Entity_Id := Cunit_Entity (Main_Unit);
1134 -- The scope may be within the main unit, or it may be an ancestor
1135 -- of the main unit, if the main unit is a child unit. In both cases
1136 -- it makes no sense to process the body before the main unit. In
1137 -- the second case, this may lead to circularities if a parent body
1138 -- depends on a child spec, and we are analyzing the child.
1140 while Scope (S) /= Standard_Standard
1141 and then not Is_Child_Unit (S)
1148 while Present (Comp)
1149 and then Nkind (Comp) /= N_Compilation_Unit
1151 Comp := Parent (Comp);
1154 if Is_Child_Unit (Ent) then
1157 and then Is_Child_Unit (Ent)
1159 if Scope (Ent) = S then
1168 Comp = Cunit (Main_Unit)
1169 or else Comp = Library_Unit (Cunit (Main_Unit));
1170 end Scope_In_Main_Unit;