1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2009, 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 Back_End; use Back_End;
29 with Csets; use Csets;
30 with Debug; use Debug;
32 with Errout; use Errout;
34 with Fname; use Fname;
35 with Fname.UF; use Fname.UF;
37 with Gnatvsn; use Gnatvsn;
41 with Lib.Writ; use Lib.Writ;
43 with Namet; use Namet;
46 with Osint; use Osint;
47 with Output; use Output;
50 with Repinfo; use Repinfo;
60 with Sinfo; use Sinfo;
61 with Sinput.L; use Sinput.L;
63 with Sprint; use Sprint;
65 with Stylesw; use Stylesw;
66 with Targparm; use Targparm;
68 with Treepr; use Treepr;
70 with Types; use Types;
71 with Uintp; use Uintp;
72 with Uname; use Uname;
75 with Validsw; use Validsw;
77 with System.Assertions;
80 Main_Unit_Node : Node_Id;
81 -- Compilation unit node for main unit
83 Main_Kind : Node_Kind;
84 -- Kind of main compilation unit node
86 Back_End_Mode : Back_End.Back_End_Mode_Type;
87 -- Record back end mode
89 procedure Adjust_Global_Switches;
90 -- There are various interactions between front end switch settings,
91 -- including debug switch settings and target dependent parameters.
92 -- This procedure takes care of properly handling these interactions.
93 -- We do it after scanning out all the switches, so that we are not
94 -- depending on the order in which switches appear.
96 procedure Check_Bad_Body;
97 -- Called to check if the unit we are compiling has a bad body
99 procedure Check_Rep_Info;
100 -- Called when we are not generating code, to check if -gnatR was requested
101 -- and if so, explain that we will not be honoring the request.
103 procedure Check_Library_Items;
104 -- For debugging -- checks the behavior of Walk_Library_Items
105 pragma Warnings (Off, Check_Library_Items);
106 -- In case the call below is commented out
108 ----------------------------
109 -- Adjust_Global_Switches --
110 ----------------------------
112 procedure Adjust_Global_Switches is
114 -- Debug flag -gnatd.I is a synonym of Generate_SCIL
116 if Debug_Flag_Dot_II then
117 Generate_SCIL := True;
120 -- Set ASIS mode if -gnatt and -gnatc are set
122 if Operating_Mode = Check_Semantics and then Tree_Output then
125 -- Turn off inlining in ASIS mode, since ASIS cannot handle the extra
126 -- information in the trees caused by inlining being active.
128 -- More specifically, the tree seems to be malformed from the ASIS
129 -- point of view if -gnatc and -gnatn appear together???
131 Inline_Active := False;
133 -- Turn off SCIL generation in ASIS mode, since SCIL requires front-
136 Generate_SCIL := False;
139 -- SCIL mode needs to disable front-end inlining since the generated
140 -- trees (in particular order and consistency between specs compiled
141 -- as part of a main unit or as part of a with-clause) are causing
144 if Generate_SCIL then
145 Front_End_Inlining := False;
148 -- Tune settings for optimal SCIL generation in CodePeer_Mode
150 if CodePeer_Mode then
152 -- Turn off inlining, confuses CodePeer output and gains nothing
154 Front_End_Inlining := False;
155 Inline_Active := False;
157 -- Turn off ASIS mode: incompatible with front-end expansion.
161 -- Turn off dynamic elaboration checks: generates inconsitencies in
162 -- trees between specs compiled as part of a main unit or as part of
165 Dynamic_Elaboration_Checks := False;
167 -- Suppress overflow checks since this is handled implicitely by
168 -- CodePeer. Enable all other language checks.
170 Suppress_Options := (Overflow_Check => True, others => False);
171 Enable_Overflow_Checks := False;
173 -- Kill debug of generated code, since it messes up sloc values
175 Debug_Generated_Code := False;
177 -- Turn cross-referencing on in case it was disabled (by e.g. -gnatD)
178 -- Do we really need to spend time generating xref in CodePeer
179 -- mode??? Consider setting Xref_Active to False.
183 -- Polling mode forced off, since it generates confusing junk
185 Polling_Required := False;
187 -- Set operating mode to check semantics with full front-end
188 -- expansion, but no back-end code generation.
190 Operating_Mode := Check_Semantics;
191 Debug_Flag_X := True;
193 -- We need SCIL generation of course
195 Generate_SCIL := True;
197 -- Enable assertions and debug pragmas, since they give CodePeer
198 -- valuable extra information.
200 Assertions_Enabled := True;
201 Debug_Pragmas_Enabled := True;
203 -- Suppress compiler warnings, since what we are interested in here
204 -- is what CodePeer can find out. Also disable all simple value
205 -- propagation. This is an optimization which is valuable for code
206 -- optimization, and also for generation of compiler warnings, but
207 -- these are being turned off anyway, and CodePeer understands
208 -- things more clearly if references are not optimized in this way.
210 Warning_Mode := Suppress;
211 Debug_Flag_MM := True;
213 -- Set normal RM validity checking, and checking of IN OUT parameters
214 -- (this might give CodePeer more useful checks to analyze, to be
215 -- confirmed???). All other validity checking is turned off, since
216 -- this can generate very complex trees that only confuse CodePeer
217 -- and do not bring enough useful info.
219 Reset_Validity_Check_Options;
220 Validity_Check_Default := True;
221 Validity_Check_In_Out_Params := True;
222 Validity_Check_In_Params := True;
224 -- Turn off style check options since we are not interested in any
225 -- front-end warnings when we are getting CodePeer output.
227 Reset_Style_Check_Options;
230 -- Set Configurable_Run_Time mode if system.ads flag set
232 if Targparm.Configurable_Run_Time_On_Target or Debug_Flag_YY then
233 Configurable_Run_Time_Mode := True;
236 -- Set -gnatR3m mode if debug flag A set
238 if Debug_Flag_AA then
239 Back_Annotate_Rep_Info := True;
240 List_Representation_Info := 1;
241 List_Representation_Info_Mechanisms := True;
244 -- Force Target_Strict_Alignment true if debug flag -gnatd.a is set
246 if Debug_Flag_Dot_A then
247 Ttypes.Target_Strict_Alignment := True;
250 -- Disable static allocation of dispatch tables if -gnatd.t or if layout
251 -- is enabled. The front end's layout phase currently treats types that
252 -- have discriminant-dependent arrays as not being static even when a
253 -- discriminant constraint on the type is static, and this leads to
254 -- problems with subtypes of type Ada.Tags.Dispatch_Table_Wrapper. ???
256 if Debug_Flag_Dot_T or else Frontend_Layout_On_Target then
257 Static_Dispatch_Tables := False;
260 -- Flip endian mode if -gnatd8 set
263 Ttypes.Bytes_Big_Endian := not Ttypes.Bytes_Big_Endian;
266 -- Deal with forcing OpenVMS switches True if debug flag M is set, but
267 -- record the setting of Targparm.Open_VMS_On_Target in True_VMS_Target
268 -- before doing this, so we know if we are in real OpenVMS or not!
270 Opt.True_VMS_Target := Targparm.OpenVMS_On_Target;
273 Targparm.OpenVMS_On_Target := True;
274 Hostparm.OpenVMS := True;
277 -- Activate front end layout if debug flag -gnatdF is set
279 if Debug_Flag_FF then
280 Targparm.Frontend_Layout_On_Target := True;
283 -- Set and check exception mechnism
285 if Targparm.ZCX_By_Default_On_Target then
286 if Targparm.GCC_ZCX_Support_On_Target then
287 Exception_Mechanism := Back_End_Exceptions;
289 Osint.Fail ("Zero Cost Exceptions not supported on this target");
293 -- Set proper status for overflow checks. We turn on overflow checks
294 -- if -gnatp was not specified, and either -gnato is set or the back
295 -- end takes care of overflow checks. Otherwise we suppress overflow
296 -- checks by default (since front end checks are expensive).
298 if not Opt.Suppress_Checks
299 and then (Opt.Enable_Overflow_Checks
301 (Targparm.Backend_Divide_Checks_On_Target
303 Targparm.Backend_Overflow_Checks_On_Target))
305 Suppress_Options (Overflow_Check) := False;
307 Suppress_Options (Overflow_Check) := True;
309 end Adjust_Global_Switches;
315 procedure Check_Bad_Body is
316 Sname : Unit_Name_Type;
317 Src_Ind : Source_File_Index;
318 Fname : File_Name_Type;
320 procedure Bad_Body_Error (Msg : String);
321 -- Issue message for bad body found
327 procedure Bad_Body_Error (Msg : String) is
329 Error_Msg_N (Msg, Main_Unit_Node);
330 Error_Msg_File_1 := Fname;
331 Error_Msg_N ("remove incorrect body in file{!", Main_Unit_Node);
334 -- Start of processing for Check_Bad_Body
337 -- Nothing to do if we are only checking syntax, because we don't know
338 -- enough to know if we require or forbid a body in this case.
340 if Operating_Mode = Check_Syntax then
344 -- Check for body not allowed
346 if (Main_Kind = N_Package_Declaration
347 and then not Body_Required (Main_Unit_Node))
348 or else (Main_Kind = N_Generic_Package_Declaration
349 and then not Body_Required (Main_Unit_Node))
350 or else Main_Kind = N_Package_Renaming_Declaration
351 or else Main_Kind = N_Subprogram_Renaming_Declaration
352 or else Nkind (Original_Node (Unit (Main_Unit_Node)))
353 in N_Generic_Instantiation
355 Sname := Unit_Name (Main_Unit);
357 -- If we do not already have a body name, then get the body name
358 -- (but how can we have a body name here ???)
360 if not Is_Body_Name (Sname) then
361 Sname := Get_Body_Name (Sname);
364 Fname := Get_File_Name (Sname, Subunit => False);
365 Src_Ind := Load_Source_File (Fname);
367 -- Case where body is present and it is not a subunit. Exclude
368 -- the subunit case, because it has nothing to do with the
369 -- package we are compiling. It is illegal for a child unit and a
370 -- subunit with the same expanded name (RM 10.2(9)) to appear
371 -- together in a partition, but there is nothing to stop a
372 -- compilation environment from having both, and the test here
373 -- simply allows that. If there is an attempt to include both in
374 -- a partition, this is diagnosed at bind time. In Ada 83 mode
375 -- this is not a warning case.
377 -- Note: if weird file names are being used, we can have
378 -- situation where the file name that supposedly contains body,
379 -- in fact contains a spec, or we can't tell what it contains.
380 -- Skip the error message in these cases.
382 -- Also ignore body that is nothing but pragma No_Body; (that's the
383 -- whole point of this pragma, to be used this way and to cause the
384 -- body file to be ignored in this context).
386 if Src_Ind /= No_Source_File
387 and then Get_Expected_Unit_Type (Fname) = Expect_Body
388 and then not Source_File_Is_Subunit (Src_Ind)
389 and then not Source_File_Is_No_Body (Src_Ind)
391 Errout.Finalize (Last_Call => False);
393 Error_Msg_Unit_1 := Sname;
395 -- Ada 83 case of a package body being ignored. This is not an
396 -- error as far as the Ada 83 RM is concerned, but it is almost
397 -- certainly not what is wanted so output a warning. Give this
398 -- message only if there were no errors, since otherwise it may
399 -- be incorrect (we may have misinterpreted a junk spec as not
400 -- needing a body when it really does).
402 if Main_Kind = N_Package_Declaration
403 and then Ada_Version = Ada_83
404 and then Operating_Mode = Generate_Code
405 and then Distribution_Stub_Mode /= Generate_Caller_Stub_Body
406 and then not Compilation_Errors
409 ("package $$ does not require a body?", Main_Unit_Node);
410 Error_Msg_File_1 := Fname;
411 Error_Msg_N ("body in file{? will be ignored", Main_Unit_Node);
413 -- Ada 95 cases of a body file present when no body is
414 -- permitted. This we consider to be an error.
417 -- For generic instantiations, we never allow a body
419 if Nkind (Original_Node (Unit (Main_Unit_Node)))
420 in N_Generic_Instantiation
423 ("generic instantiation for $$ does not allow a body");
425 -- A library unit that is a renaming never allows a body
427 elsif Main_Kind in N_Renaming_Declaration then
429 ("renaming declaration for $$ does not allow a body!");
431 -- Remaining cases are packages and generic packages. Here
432 -- we only do the test if there are no previous errors,
433 -- because if there are errors, they may lead us to
434 -- incorrectly believe that a package does not allow a body
435 -- when in fact it does.
437 elsif not Compilation_Errors then
438 if Main_Kind = N_Package_Declaration then
440 ("package $$ does not allow a body!");
442 elsif Main_Kind = N_Generic_Package_Declaration then
444 ("generic package $$ does not allow a body!");
457 procedure Check_Rep_Info is
459 if List_Representation_Info /= 0
460 or else List_Representation_Info_Mechanisms
465 ("cannot generate representation information, no code generated");
472 -------------------------
473 -- Check_Library_Items --
474 -------------------------
476 -- Walk_Library_Items has plenty of assertions, so all we need to do is
477 -- call it, just for these assertions, not actually doing anything else.
479 procedure Check_Library_Items is
481 procedure Action (Item : Node_Id);
482 -- Action passed to Walk_Library_Items to do nothing
488 procedure Action (Item : Node_Id) is
493 procedure Walk is new Sem.Walk_Library_Items (Action);
495 -- Start of processing for Check_Library_Items
499 end Check_Library_Items;
501 -- Start of processing for Gnat1drv
504 -- This inner block is set up to catch assertion errors and constraint
505 -- errors. Since the code for handling these errors can cause another
506 -- exception to be raised (namely Unrecoverable_Error), we need two
507 -- nested blocks, so that the outer one handles unrecoverable error.
510 -- Initialize all packages. For the most part, these initialization
511 -- calls can be made in any order. Exceptions are as follows:
513 -- Lib.Initialize need to be called before Scan_Compiler_Arguments,
514 -- because it initializes a table filled by Scan_Compiler_Arguments.
520 Scan_Compiler_Arguments;
521 Osint.Add_Default_Search_Dirs;
540 Sem_Type.Init_Interp_Tables;
542 -- Acquire target parameters from system.ads (source of package System)
547 S : Source_File_Index;
551 Name_Buffer (1 .. 10) := "system.ads";
554 S := Load_Source_File (N);
556 if S = No_Source_File then
558 ("fatal error, run-time library not installed correctly");
560 ("cannot locate file system.ads");
561 raise Unrecoverable_Error;
563 -- Remember source index of system.ads (which was read successfully)
566 System_Source_File_Index := S;
569 Targparm.Get_Target_Parameters
570 (System_Text => Source_Text (S),
571 Source_First => Source_First (S),
572 Source_Last => Source_Last (S));
574 -- Acquire configuration pragma information from Targparm
576 Restrict.Restrictions := Targparm.Restrictions_On_Target;
579 Adjust_Global_Switches;
581 -- Output copyright notice if full list mode unless we have a list
582 -- file, in which case we defer this so that it is output in the file
584 if (Verbose_Mode or else (Full_List and then Full_List_File_Name = null))
585 and then not Debug_Flag_7
589 Write_Str (Gnat_Version_String);
591 Write_Str ("Copyright 1992-" &
593 ", Free Software Foundation, Inc.");
597 -- Check we do not have more than one source file, this happens only in
598 -- the case where the driver is called directly, it cannot happen when
599 -- gnat1 is invoked from gcc in the normal case.
601 if Osint.Number_Of_Files /= 1 then
604 Osint.Fail ("you must provide one source file");
606 elsif Usage_Requested then
610 Original_Operating_Mode := Operating_Mode;
613 -- Exit with errors if the main source could not be parsed
615 if Sinput.Main_Source_File = No_Source_File then
616 Errout.Finalize (Last_Call => True);
617 Errout.Output_Messages;
618 Exit_Program (E_Errors);
621 Main_Unit_Node := Cunit (Main_Unit);
622 Main_Kind := Nkind (Unit (Main_Unit_Node));
625 -- Exit if compilation errors detected
627 Errout.Finalize (Last_Call => False);
629 if Compilation_Errors then
631 Sem_Ch13.Validate_Unchecked_Conversions;
632 Sem_Ch13.Validate_Address_Clauses;
633 Errout.Output_Messages;
636 -- Generate ALI file if specially requested
638 if Opt.Force_ALI_Tree_File then
639 Write_ALI (Object => False);
643 Errout.Finalize (Last_Call => True);
644 Exit_Program (E_Errors);
647 -- Set Generate_Code on main unit and its spec. We do this even if are
648 -- not generating code, since Lib-Writ uses this to determine which
649 -- units get written in the ali file.
651 Set_Generate_Code (Main_Unit);
653 -- If we have a corresponding spec, and it comes from source
654 -- or it is not a generated spec for a child subprogram body,
655 -- then we need object code for the spec unit as well.
657 if Nkind (Unit (Main_Unit_Node)) in N_Unit_Body
658 and then not Acts_As_Spec (Main_Unit_Node)
660 if Nkind (Unit (Main_Unit_Node)) = N_Subprogram_Body
661 and then not Comes_From_Source (Library_Unit (Main_Unit_Node))
666 (Get_Cunit_Unit_Number (Library_Unit (Main_Unit_Node)));
670 -- Case of no code required to be generated, exit indicating no error
672 if Original_Operating_Mode = Check_Syntax then
674 Errout.Finalize (Last_Call => True);
675 Errout.Output_Messages;
680 -- Use a goto instead of calling Exit_Program so that finalization
685 elsif Original_Operating_Mode = Check_Semantics then
686 Back_End_Mode := Declarations_Only;
688 -- All remaining cases are cases in which the user requested that code
689 -- be generated (i.e. no -gnatc or -gnats switch was used). Check if
690 -- we can in fact satisfy this request.
692 -- Cannot generate code if someone has turned off code generation for
693 -- any reason at all. We will try to figure out a reason below.
695 elsif Operating_Mode /= Generate_Code then
696 Back_End_Mode := Skip;
698 -- We can generate code for a subprogram body unless there were missing
699 -- subunits. Note that we always generate code for all generic units (a
700 -- change from some previous versions of GNAT).
702 elsif Main_Kind = N_Subprogram_Body
703 and then not Subunits_Missing
705 Back_End_Mode := Generate_Object;
707 -- We can generate code for a package body unless there are subunits
708 -- missing (note that we always generate code for generic units, which
709 -- is a change from some earlier versions of GNAT).
711 elsif Main_Kind = N_Package_Body
712 and then not Subunits_Missing
714 Back_End_Mode := Generate_Object;
716 -- We can generate code for a package declaration or a subprogram
717 -- declaration only if it does not required a body.
719 elsif (Main_Kind = N_Package_Declaration
721 Main_Kind = N_Subprogram_Declaration)
723 (not Body_Required (Main_Unit_Node)
725 Distribution_Stub_Mode = Generate_Caller_Stub_Body)
727 Back_End_Mode := Generate_Object;
729 -- We can generate code for a generic package declaration of a generic
730 -- subprogram declaration only if does not require a body.
732 elsif (Main_Kind = N_Generic_Package_Declaration
734 Main_Kind = N_Generic_Subprogram_Declaration)
735 and then not Body_Required (Main_Unit_Node)
737 Back_End_Mode := Generate_Object;
739 -- Compilation units that are renamings do not require bodies,
740 -- so we can generate code for them.
742 elsif Main_Kind = N_Package_Renaming_Declaration
743 or else Main_Kind = N_Subprogram_Renaming_Declaration
745 Back_End_Mode := Generate_Object;
747 -- Compilation units that are generic renamings do not require bodies
748 -- so we can generate code for them.
750 elsif Main_Kind in N_Generic_Renaming_Declaration then
751 Back_End_Mode := Generate_Object;
753 -- In all other cases (specs which have bodies, generics, and bodies
754 -- where subunits are missing), we cannot generate code and we generate
755 -- a warning message. Note that generic instantiations are gone at this
756 -- stage since they have been replaced by their instances.
759 Back_End_Mode := Skip;
762 -- At this stage Back_End_Mode is set to indicate if the backend should
763 -- be called to generate code. If it is Skip, then code generation has
764 -- been turned off, even though code was requested by the original
765 -- command. This is not an error from the user point of view, but it is
766 -- an error from the point of view of the gcc driver, so we must exit
767 -- with an error status.
769 -- We generate an informative message (from the gcc point of view, it
770 -- is an error message, but from the users point of view this is not an
771 -- error, just a consequence of compiling something that cannot
774 if Back_End_Mode = Skip then
776 Write_Str ("cannot generate code for ");
778 Write_Name (Unit_File_Name (Main_Unit));
780 if Subunits_Missing then
781 Write_Str (" (missing subunits)");
783 Write_Str ("to check parent unit");
785 elsif Main_Kind = N_Subunit then
786 Write_Str (" (subunit)");
788 Write_Str ("to check subunit");
790 elsif Main_Kind = N_Subprogram_Declaration then
791 Write_Str (" (subprogram spec)");
793 Write_Str ("to check subprogram spec");
795 -- Generic package body in GNAT implementation mode
797 elsif Main_Kind = N_Package_Body and then GNAT_Mode then
798 Write_Str (" (predefined generic)");
800 Write_Str ("to check predefined generic");
802 -- Only other case is a package spec
805 Write_Str (" (package spec)");
807 Write_Str ("to check package spec");
810 Write_Str (" for errors, use ");
812 if Hostparm.OpenVMS then
813 Write_Str ("/NOLOAD");
815 Write_Str ("-gnatc");
821 Sem_Ch13.Validate_Unchecked_Conversions;
822 Sem_Ch13.Validate_Address_Clauses;
823 Errout.Finalize (Last_Call => True);
824 Errout.Output_Messages;
827 Write_ALI (Object => False);
831 -- Exit program with error indication, to kill object file
833 Exit_Program (E_No_Code);
836 -- In -gnatc mode, we only do annotation if -gnatt or -gnatR is also
837 -- set as indicated by Back_Annotate_Rep_Info being set to True.
839 -- We don't call for annotations on a subunit, because to process those
840 -- the back-end requires that the parent(s) be properly compiled.
842 -- Annotation is suppressed for targets where front-end layout is
843 -- enabled, because the front end determines representations.
845 -- Annotation is also suppressed in the case of compiling for
846 -- a VM, since representations are largely symbolic there.
848 if Back_End_Mode = Declarations_Only
849 and then (not (Back_Annotate_Rep_Info or Generate_SCIL)
850 or else Main_Kind = N_Subunit
851 or else Targparm.Frontend_Layout_On_Target
852 or else Targparm.VM_Target /= No_VM)
854 Sem_Ch13.Validate_Unchecked_Conversions;
855 Sem_Ch13.Validate_Address_Clauses;
856 Errout.Finalize (Last_Call => True);
857 Errout.Output_Messages;
858 Write_ALI (Object => False);
866 -- Ensure that we properly register a dependency on system.ads, since
867 -- even if we do not semantically depend on this, Targparm has read
868 -- system parameters from the system.ads file.
870 Lib.Writ.Ensure_System_Dependency;
872 -- Add dependencies, if any, on preprocessing data file and on
873 -- preprocessing definition file(s).
875 Prepcomp.Add_Dependencies;
877 -- Back end needs to explicitly unlock tables it needs to touch
890 -- ???Check_Library_Items under control of a debug flag, because it
891 -- currently does not work if the -gnatn switch (back end inlining) is
894 if Debug_Flag_Dot_WW then
898 -- Here we call the back end to generate the output code
900 Generating_Code := True;
901 Back_End.Call_Back_End (Back_End_Mode);
903 -- Once the backend is complete, we unlock the names table. This call
904 -- allows a few extra entries, needed for example for the file name for
905 -- the library file output.
909 -- Validate unchecked conversions (using the values for size and
910 -- alignment annotated by the backend where possible).
912 Sem_Ch13.Validate_Unchecked_Conversions;
914 -- Validate address clauses (again using alignment values annotated
915 -- by the backend where possible).
917 Sem_Ch13.Validate_Address_Clauses;
919 -- Now we complete output of errors, rep info and the tree info. These
920 -- are delayed till now, since it is perfectly possible for gigi to
921 -- generate errors, modify the tree (in particular by setting flags
922 -- indicating that elaboration is required, and also to back annotate
923 -- representation information for List_Rep_Info.
925 Errout.Finalize (Last_Call => True);
926 Errout.Output_Messages;
929 -- Only write the library if the backend did not generate any error
930 -- messages. Otherwise signal errors to the driver program so that
931 -- there will be no attempt to generate an object file.
933 if Compilation_Errors then
935 Exit_Program (E_Errors);
938 Write_ALI (Object => (Back_End_Mode = Generate_Object));
940 -- Generate the ASIS tree after writing the ALI file, since in ASIS
941 -- mode, Write_ALI may in fact result in further tree decoration from
942 -- the original tree file. Note that we dump the tree just before
943 -- generating it, so that the dump will exactly reflect what is written
949 -- Finalize name table and we are all done
954 -- Handle fatal internal compiler errors
956 when Rtsfind.RE_Not_Available =>
957 Comperr.Compiler_Abort ("RE_Not_Available");
959 when System.Assertions.Assert_Failure =>
960 Comperr.Compiler_Abort ("Assert_Failure");
962 when Constraint_Error =>
963 Comperr.Compiler_Abort ("Constraint_Error");
965 when Program_Error =>
966 Comperr.Compiler_Abort ("Program_Error");
968 when Storage_Error =>
970 -- Assume this is a bug. If it is real, the message will in any case
971 -- say Storage_Error, giving a strong hint!
973 Comperr.Compiler_Abort ("Storage_Error");
979 -- The outer exception handles an unrecoverable error
982 when Unrecoverable_Error =>
983 Errout.Finalize (Last_Call => True);
984 Errout.Output_Messages;
987 Write_Str ("compilation abandoned");
993 Exit_Program (E_Errors);