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 -- Suppress overflow checks and access checks since they are handled
162 -- implicitly by CodePeer.
164 -- Turn off dynamic elaboration checks: generates inconsistencies in
165 -- trees between specs compiled as part of a main unit or as part of
168 -- Enable all other language checks
171 (Overflow_Check => True,
172 Access_Check => True,
173 Elaboration_Check => True,
175 Enable_Overflow_Checks := False;
176 Dynamic_Elaboration_Checks := False;
178 -- Kill debug of generated code, since it messes up sloc values
180 Debug_Generated_Code := False;
182 -- Turn cross-referencing on in case it was disabled (by e.g. -gnatD)
183 -- Do we really need to spend time generating xref in CodePeer
184 -- mode??? Consider setting Xref_Active to False.
188 -- Polling mode forced off, since it generates confusing junk
190 Polling_Required := False;
192 -- Set operating mode to Generate_Code to benefit from full
193 -- front-end expansion (e.g. generics).
195 Operating_Mode := Generate_Code;
197 -- We need SCIL generation of course
199 Generate_SCIL := True;
201 -- Enable assertions and debug pragmas, since they give CodePeer
202 -- valuable extra information.
204 Assertions_Enabled := True;
205 Debug_Pragmas_Enabled := True;
207 -- Suppress compiler warnings, since what we are interested in here
208 -- is what CodePeer can find out. Also disable all simple value
209 -- propagation. This is an optimization which is valuable for code
210 -- optimization, and also for generation of compiler warnings, but
211 -- these are being turned off anyway, and CodePeer understands
212 -- things more clearly if references are not optimized in this way.
214 Warning_Mode := Suppress;
215 Debug_Flag_MM := True;
217 -- Set normal RM validity checking, and checking of IN OUT parameters
218 -- (this might give CodePeer more useful checks to analyze, to be
219 -- confirmed???). All other validity checking is turned off, since
220 -- this can generate very complex trees that only confuse CodePeer
221 -- and do not bring enough useful info.
223 Reset_Validity_Check_Options;
224 Validity_Check_Default := True;
225 Validity_Check_In_Out_Params := True;
226 Validity_Check_In_Params := True;
228 -- Turn off style check options since we are not interested in any
229 -- front-end warnings when we are getting CodePeer output.
231 Reset_Style_Check_Options;
234 -- Set Configurable_Run_Time mode if system.ads flag set
236 if Targparm.Configurable_Run_Time_On_Target or Debug_Flag_YY then
237 Configurable_Run_Time_Mode := True;
240 -- Set -gnatR3m mode if debug flag A set
242 if Debug_Flag_AA then
243 Back_Annotate_Rep_Info := True;
244 List_Representation_Info := 1;
245 List_Representation_Info_Mechanisms := True;
248 -- Force Target_Strict_Alignment true if debug flag -gnatd.a is set
250 if Debug_Flag_Dot_A then
251 Ttypes.Target_Strict_Alignment := True;
254 -- Disable static allocation of dispatch tables if -gnatd.t or if layout
255 -- is enabled. The front end's layout phase currently treats types that
256 -- have discriminant-dependent arrays as not being static even when a
257 -- discriminant constraint on the type is static, and this leads to
258 -- problems with subtypes of type Ada.Tags.Dispatch_Table_Wrapper. ???
260 if Debug_Flag_Dot_T or else Frontend_Layout_On_Target then
261 Static_Dispatch_Tables := False;
264 -- Flip endian mode if -gnatd8 set
267 Ttypes.Bytes_Big_Endian := not Ttypes.Bytes_Big_Endian;
270 -- Deal with forcing OpenVMS switches True if debug flag M is set, but
271 -- record the setting of Targparm.Open_VMS_On_Target in True_VMS_Target
272 -- before doing this, so we know if we are in real OpenVMS or not!
274 Opt.True_VMS_Target := Targparm.OpenVMS_On_Target;
277 Targparm.OpenVMS_On_Target := True;
278 Hostparm.OpenVMS := True;
281 -- Activate front end layout if debug flag -gnatdF is set
283 if Debug_Flag_FF then
284 Targparm.Frontend_Layout_On_Target := True;
287 -- Set and check exception mechnism
289 if Targparm.ZCX_By_Default_On_Target then
290 if Targparm.GCC_ZCX_Support_On_Target then
291 Exception_Mechanism := Back_End_Exceptions;
293 Osint.Fail ("Zero Cost Exceptions not supported on this target");
297 -- Set proper status for overflow checks. We turn on overflow checks
298 -- if -gnatp was not specified, and either -gnato is set or the back
299 -- end takes care of overflow checks. Otherwise we suppress overflow
300 -- checks by default (since front end checks are expensive).
302 if not Opt.Suppress_Checks
303 and then (Opt.Enable_Overflow_Checks
305 (Targparm.Backend_Divide_Checks_On_Target
307 Targparm.Backend_Overflow_Checks_On_Target))
309 Suppress_Options (Overflow_Check) := False;
311 Suppress_Options (Overflow_Check) := True;
313 end Adjust_Global_Switches;
319 procedure Check_Bad_Body is
320 Sname : Unit_Name_Type;
321 Src_Ind : Source_File_Index;
322 Fname : File_Name_Type;
324 procedure Bad_Body_Error (Msg : String);
325 -- Issue message for bad body found
331 procedure Bad_Body_Error (Msg : String) is
333 Error_Msg_N (Msg, Main_Unit_Node);
334 Error_Msg_File_1 := Fname;
335 Error_Msg_N ("remove incorrect body in file{!", Main_Unit_Node);
338 -- Start of processing for Check_Bad_Body
341 -- Nothing to do if we are only checking syntax, because we don't know
342 -- enough to know if we require or forbid a body in this case.
344 if Operating_Mode = Check_Syntax then
348 -- Check for body not allowed
350 if (Main_Kind = N_Package_Declaration
351 and then not Body_Required (Main_Unit_Node))
352 or else (Main_Kind = N_Generic_Package_Declaration
353 and then not Body_Required (Main_Unit_Node))
354 or else Main_Kind = N_Package_Renaming_Declaration
355 or else Main_Kind = N_Subprogram_Renaming_Declaration
356 or else Nkind (Original_Node (Unit (Main_Unit_Node)))
357 in N_Generic_Instantiation
359 Sname := Unit_Name (Main_Unit);
361 -- If we do not already have a body name, then get the body name
362 -- (but how can we have a body name here ???)
364 if not Is_Body_Name (Sname) then
365 Sname := Get_Body_Name (Sname);
368 Fname := Get_File_Name (Sname, Subunit => False);
369 Src_Ind := Load_Source_File (Fname);
371 -- Case where body is present and it is not a subunit. Exclude
372 -- the subunit case, because it has nothing to do with the
373 -- package we are compiling. It is illegal for a child unit and a
374 -- subunit with the same expanded name (RM 10.2(9)) to appear
375 -- together in a partition, but there is nothing to stop a
376 -- compilation environment from having both, and the test here
377 -- simply allows that. If there is an attempt to include both in
378 -- a partition, this is diagnosed at bind time. In Ada 83 mode
379 -- this is not a warning case.
381 -- Note: if weird file names are being used, we can have
382 -- situation where the file name that supposedly contains body,
383 -- in fact contains a spec, or we can't tell what it contains.
384 -- Skip the error message in these cases.
386 -- Also ignore body that is nothing but pragma No_Body; (that's the
387 -- whole point of this pragma, to be used this way and to cause the
388 -- body file to be ignored in this context).
390 if Src_Ind /= No_Source_File
391 and then Get_Expected_Unit_Type (Fname) = Expect_Body
392 and then not Source_File_Is_Subunit (Src_Ind)
393 and then not Source_File_Is_No_Body (Src_Ind)
395 Errout.Finalize (Last_Call => False);
397 Error_Msg_Unit_1 := Sname;
399 -- Ada 83 case of a package body being ignored. This is not an
400 -- error as far as the Ada 83 RM is concerned, but it is almost
401 -- certainly not what is wanted so output a warning. Give this
402 -- message only if there were no errors, since otherwise it may
403 -- be incorrect (we may have misinterpreted a junk spec as not
404 -- needing a body when it really does).
406 if Main_Kind = N_Package_Declaration
407 and then Ada_Version = Ada_83
408 and then Operating_Mode = Generate_Code
409 and then Distribution_Stub_Mode /= Generate_Caller_Stub_Body
410 and then not Compilation_Errors
413 ("package $$ does not require a body?", Main_Unit_Node);
414 Error_Msg_File_1 := Fname;
415 Error_Msg_N ("body in file{? will be ignored", Main_Unit_Node);
417 -- Ada 95 cases of a body file present when no body is
418 -- permitted. This we consider to be an error.
421 -- For generic instantiations, we never allow a body
423 if Nkind (Original_Node (Unit (Main_Unit_Node)))
424 in N_Generic_Instantiation
427 ("generic instantiation for $$ does not allow a body");
429 -- A library unit that is a renaming never allows a body
431 elsif Main_Kind in N_Renaming_Declaration then
433 ("renaming declaration for $$ does not allow a body!");
435 -- Remaining cases are packages and generic packages. Here
436 -- we only do the test if there are no previous errors,
437 -- because if there are errors, they may lead us to
438 -- incorrectly believe that a package does not allow a body
439 -- when in fact it does.
441 elsif not Compilation_Errors then
442 if Main_Kind = N_Package_Declaration then
444 ("package $$ does not allow a body!");
446 elsif Main_Kind = N_Generic_Package_Declaration then
448 ("generic package $$ does not allow a body!");
461 procedure Check_Rep_Info is
463 if List_Representation_Info /= 0
464 or else List_Representation_Info_Mechanisms
469 ("cannot generate representation information, no code generated");
476 -------------------------
477 -- Check_Library_Items --
478 -------------------------
480 -- Walk_Library_Items has plenty of assertions, so all we need to do is
481 -- call it, just for these assertions, not actually doing anything else.
483 procedure Check_Library_Items is
485 procedure Action (Item : Node_Id);
486 -- Action passed to Walk_Library_Items to do nothing
492 procedure Action (Item : Node_Id) is
497 procedure Walk is new Sem.Walk_Library_Items (Action);
499 -- Start of processing for Check_Library_Items
503 end Check_Library_Items;
505 -- Start of processing for Gnat1drv
508 -- This inner block is set up to catch assertion errors and constraint
509 -- errors. Since the code for handling these errors can cause another
510 -- exception to be raised (namely Unrecoverable_Error), we need two
511 -- nested blocks, so that the outer one handles unrecoverable error.
514 -- Initialize all packages. For the most part, these initialization
515 -- calls can be made in any order. Exceptions are as follows:
517 -- Lib.Initialize need to be called before Scan_Compiler_Arguments,
518 -- because it initializes a table filled by Scan_Compiler_Arguments.
524 Scan_Compiler_Arguments;
525 Osint.Add_Default_Search_Dirs;
544 Sem_Type.Init_Interp_Tables;
546 -- Acquire target parameters from system.ads (source of package System)
551 S : Source_File_Index;
555 Name_Buffer (1 .. 10) := "system.ads";
558 S := Load_Source_File (N);
560 if S = No_Source_File then
562 ("fatal error, run-time library not installed correctly");
564 ("cannot locate file system.ads");
565 raise Unrecoverable_Error;
567 -- Remember source index of system.ads (which was read successfully)
570 System_Source_File_Index := S;
573 Targparm.Get_Target_Parameters
574 (System_Text => Source_Text (S),
575 Source_First => Source_First (S),
576 Source_Last => Source_Last (S));
578 -- Acquire configuration pragma information from Targparm
580 Restrict.Restrictions := Targparm.Restrictions_On_Target;
583 Adjust_Global_Switches;
585 -- Output copyright notice if full list mode unless we have a list
586 -- file, in which case we defer this so that it is output in the file
588 if (Verbose_Mode or else (Full_List and then Full_List_File_Name = null))
589 and then not Debug_Flag_7
593 Write_Str (Gnat_Version_String);
595 Write_Str ("Copyright 1992-" &
597 ", Free Software Foundation, Inc.");
601 -- Check we do not have more than one source file, this happens only in
602 -- the case where the driver is called directly, it cannot happen when
603 -- gnat1 is invoked from gcc in the normal case.
605 if Osint.Number_Of_Files /= 1 then
608 Osint.Fail ("you must provide one source file");
610 elsif Usage_Requested then
614 Original_Operating_Mode := Operating_Mode;
617 -- Exit with errors if the main source could not be parsed
619 if Sinput.Main_Source_File = No_Source_File then
620 Errout.Finalize (Last_Call => True);
621 Errout.Output_Messages;
622 Exit_Program (E_Errors);
625 Main_Unit_Node := Cunit (Main_Unit);
626 Main_Kind := Nkind (Unit (Main_Unit_Node));
629 -- Exit if compilation errors detected
631 Errout.Finalize (Last_Call => False);
633 if Compilation_Errors then
635 Sem_Ch13.Validate_Unchecked_Conversions;
636 Sem_Ch13.Validate_Address_Clauses;
637 Errout.Output_Messages;
640 -- Generate ALI file if specially requested
642 if Opt.Force_ALI_Tree_File then
643 Write_ALI (Object => False);
647 Errout.Finalize (Last_Call => True);
648 Exit_Program (E_Errors);
651 -- Set Generate_Code on main unit and its spec. We do this even if are
652 -- not generating code, since Lib-Writ uses this to determine which
653 -- units get written in the ali file.
655 Set_Generate_Code (Main_Unit);
657 -- If we have a corresponding spec, and it comes from source
658 -- or it is not a generated spec for a child subprogram body,
659 -- then we need object code for the spec unit as well.
661 if Nkind (Unit (Main_Unit_Node)) in N_Unit_Body
662 and then not Acts_As_Spec (Main_Unit_Node)
664 if Nkind (Unit (Main_Unit_Node)) = N_Subprogram_Body
665 and then not Comes_From_Source (Library_Unit (Main_Unit_Node))
670 (Get_Cunit_Unit_Number (Library_Unit (Main_Unit_Node)));
674 -- Case of no code required to be generated, exit indicating no error
676 if Original_Operating_Mode = Check_Syntax then
678 Errout.Finalize (Last_Call => True);
679 Errout.Output_Messages;
684 -- Use a goto instead of calling Exit_Program so that finalization
689 elsif Original_Operating_Mode = Check_Semantics then
690 Back_End_Mode := Declarations_Only;
692 -- All remaining cases are cases in which the user requested that code
693 -- be generated (i.e. no -gnatc or -gnats switch was used). Check if
694 -- we can in fact satisfy this request.
696 -- Cannot generate code if someone has turned off code generation for
697 -- any reason at all. We will try to figure out a reason below.
699 elsif Operating_Mode /= Generate_Code then
700 Back_End_Mode := Skip;
702 -- We can generate code for a subprogram body unless there were missing
703 -- subunits. Note that we always generate code for all generic units (a
704 -- change from some previous versions of GNAT).
706 elsif Main_Kind = N_Subprogram_Body
707 and then not Subunits_Missing
709 Back_End_Mode := Generate_Object;
711 -- We can generate code for a package body unless there are subunits
712 -- missing (note that we always generate code for generic units, which
713 -- is a change from some earlier versions of GNAT).
715 elsif Main_Kind = N_Package_Body
716 and then not Subunits_Missing
718 Back_End_Mode := Generate_Object;
720 -- We can generate code for a package declaration or a subprogram
721 -- declaration only if it does not required a body.
723 elsif (Main_Kind = N_Package_Declaration
725 Main_Kind = N_Subprogram_Declaration)
727 (not Body_Required (Main_Unit_Node)
729 Distribution_Stub_Mode = Generate_Caller_Stub_Body)
731 Back_End_Mode := Generate_Object;
733 -- We can generate code for a generic package declaration of a generic
734 -- subprogram declaration only if does not require a body.
736 elsif (Main_Kind = N_Generic_Package_Declaration
738 Main_Kind = N_Generic_Subprogram_Declaration)
739 and then not Body_Required (Main_Unit_Node)
741 Back_End_Mode := Generate_Object;
743 -- Compilation units that are renamings do not require bodies,
744 -- so we can generate code for them.
746 elsif Main_Kind = N_Package_Renaming_Declaration
747 or else Main_Kind = N_Subprogram_Renaming_Declaration
749 Back_End_Mode := Generate_Object;
751 -- Compilation units that are generic renamings do not require bodies
752 -- so we can generate code for them.
754 elsif Main_Kind in N_Generic_Renaming_Declaration then
755 Back_End_Mode := Generate_Object;
757 -- It's not an error to generate SCIL for e.g. a spec which has a body
759 elsif CodePeer_Mode then
760 Back_End_Mode := Generate_Object;
762 -- In all other cases (specs which have bodies, generics, and bodies
763 -- where subunits are missing), we cannot generate code and we generate
764 -- a warning message. Note that generic instantiations are gone at this
765 -- stage since they have been replaced by their instances.
768 Back_End_Mode := Skip;
771 -- At this stage Back_End_Mode is set to indicate if the backend should
772 -- be called to generate code. If it is Skip, then code generation has
773 -- been turned off, even though code was requested by the original
774 -- command. This is not an error from the user point of view, but it is
775 -- an error from the point of view of the gcc driver, so we must exit
776 -- with an error status.
778 -- We generate an informative message (from the gcc point of view, it
779 -- is an error message, but from the users point of view this is not an
780 -- error, just a consequence of compiling something that cannot
783 if Back_End_Mode = Skip then
785 Write_Str ("cannot generate code for ");
787 Write_Name (Unit_File_Name (Main_Unit));
789 if Subunits_Missing then
790 Write_Str (" (missing subunits)");
792 Write_Str ("to check parent unit");
794 elsif Main_Kind = N_Subunit then
795 Write_Str (" (subunit)");
797 Write_Str ("to check subunit");
799 elsif Main_Kind = N_Subprogram_Declaration then
800 Write_Str (" (subprogram spec)");
802 Write_Str ("to check subprogram spec");
804 -- Generic package body in GNAT implementation mode
806 elsif Main_Kind = N_Package_Body and then GNAT_Mode then
807 Write_Str (" (predefined generic)");
809 Write_Str ("to check predefined generic");
811 -- Only other case is a package spec
814 Write_Str (" (package spec)");
816 Write_Str ("to check package spec");
819 Write_Str (" for errors, use ");
821 if Hostparm.OpenVMS then
822 Write_Str ("/NOLOAD");
824 Write_Str ("-gnatc");
830 Sem_Ch13.Validate_Unchecked_Conversions;
831 Sem_Ch13.Validate_Address_Clauses;
832 Errout.Finalize (Last_Call => True);
833 Errout.Output_Messages;
836 Write_ALI (Object => False);
840 -- Exit program with error indication, to kill object file
842 Exit_Program (E_No_Code);
845 -- In -gnatc mode, we only do annotation if -gnatt or -gnatR is also
846 -- set as indicated by Back_Annotate_Rep_Info being set to True.
848 -- We don't call for annotations on a subunit, because to process those
849 -- the back-end requires that the parent(s) be properly compiled.
851 -- Annotation is suppressed for targets where front-end layout is
852 -- enabled, because the front end determines representations.
854 -- Annotation is also suppressed in the case of compiling for
855 -- a VM, since representations are largely symbolic there.
857 if Back_End_Mode = Declarations_Only
858 and then (not (Back_Annotate_Rep_Info or Generate_SCIL)
859 or else Main_Kind = N_Subunit
860 or else Targparm.Frontend_Layout_On_Target
861 or else Targparm.VM_Target /= No_VM)
863 Sem_Ch13.Validate_Unchecked_Conversions;
864 Sem_Ch13.Validate_Address_Clauses;
865 Errout.Finalize (Last_Call => True);
866 Errout.Output_Messages;
867 Write_ALI (Object => False);
875 -- Ensure that we properly register a dependency on system.ads, since
876 -- even if we do not semantically depend on this, Targparm has read
877 -- system parameters from the system.ads file.
879 Lib.Writ.Ensure_System_Dependency;
881 -- Add dependencies, if any, on preprocessing data file and on
882 -- preprocessing definition file(s).
884 Prepcomp.Add_Dependencies;
886 -- Back end needs to explicitly unlock tables it needs to touch
899 -- ???Check_Library_Items under control of a debug flag, because it
900 -- currently does not work if the -gnatn switch (back end inlining) is
903 if Debug_Flag_Dot_WW then
907 -- Here we call the back end to generate the output code
909 Generating_Code := True;
910 Back_End.Call_Back_End (Back_End_Mode);
912 -- Once the backend is complete, we unlock the names table. This call
913 -- allows a few extra entries, needed for example for the file name for
914 -- the library file output.
918 -- Validate unchecked conversions (using the values for size and
919 -- alignment annotated by the backend where possible).
921 Sem_Ch13.Validate_Unchecked_Conversions;
923 -- Validate address clauses (again using alignment values annotated
924 -- by the backend where possible).
926 Sem_Ch13.Validate_Address_Clauses;
928 -- Now we complete output of errors, rep info and the tree info. These
929 -- are delayed till now, since it is perfectly possible for gigi to
930 -- generate errors, modify the tree (in particular by setting flags
931 -- indicating that elaboration is required, and also to back annotate
932 -- representation information for List_Rep_Info.
934 Errout.Finalize (Last_Call => True);
935 Errout.Output_Messages;
938 -- Only write the library if the backend did not generate any error
939 -- messages. Otherwise signal errors to the driver program so that
940 -- there will be no attempt to generate an object file.
942 if Compilation_Errors then
944 Exit_Program (E_Errors);
947 Write_ALI (Object => (Back_End_Mode = Generate_Object));
949 -- Generate the ASIS tree after writing the ALI file, since in ASIS
950 -- mode, Write_ALI may in fact result in further tree decoration from
951 -- the original tree file. Note that we dump the tree just before
952 -- generating it, so that the dump will exactly reflect what is written
958 -- Finalize name table and we are all done
963 -- Handle fatal internal compiler errors
965 when Rtsfind.RE_Not_Available =>
966 Comperr.Compiler_Abort ("RE_Not_Available");
968 when System.Assertions.Assert_Failure =>
969 Comperr.Compiler_Abort ("Assert_Failure");
971 when Constraint_Error =>
972 Comperr.Compiler_Abort ("Constraint_Error");
974 when Program_Error =>
975 Comperr.Compiler_Abort ("Program_Error");
977 when Storage_Error =>
979 -- Assume this is a bug. If it is real, the message will in any case
980 -- say Storage_Error, giving a strong hint!
982 Comperr.Compiler_Abort ("Storage_Error");
988 -- The outer exception handles an unrecoverable error
991 when Unrecoverable_Error =>
992 Errout.Finalize (Last_Call => True);
993 Errout.Output_Messages;
996 Write_Str ("compilation abandoned");
1002 Exit_Program (E_Errors);