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 and access checks since they are handled
168 -- implicitely by CodePeer. Enable all other language checks.
171 (Overflow_Check => True,
172 Access_Check => True,
174 Enable_Overflow_Checks := False;
176 -- Kill debug of generated code, since it messes up sloc values
178 Debug_Generated_Code := False;
180 -- Turn cross-referencing on in case it was disabled (by e.g. -gnatD)
181 -- Do we really need to spend time generating xref in CodePeer
182 -- mode??? Consider setting Xref_Active to False.
186 -- Polling mode forced off, since it generates confusing junk
188 Polling_Required := False;
190 -- Set operating mode to Generate_Code to benefit from full
191 -- front-end expansion (e.g. generics).
193 Operating_Mode := Generate_Code;
195 -- We need SCIL generation of course
197 Generate_SCIL := True;
199 -- Enable assertions and debug pragmas, since they give CodePeer
200 -- valuable extra information.
202 Assertions_Enabled := True;
203 Debug_Pragmas_Enabled := True;
205 -- Suppress compiler warnings, since what we are interested in here
206 -- is what CodePeer can find out. Also disable all simple value
207 -- propagation. This is an optimization which is valuable for code
208 -- optimization, and also for generation of compiler warnings, but
209 -- these are being turned off anyway, and CodePeer understands
210 -- things more clearly if references are not optimized in this way.
212 Warning_Mode := Suppress;
213 Debug_Flag_MM := True;
215 -- Set normal RM validity checking, and checking of IN OUT parameters
216 -- (this might give CodePeer more useful checks to analyze, to be
217 -- confirmed???). All other validity checking is turned off, since
218 -- this can generate very complex trees that only confuse CodePeer
219 -- and do not bring enough useful info.
221 Reset_Validity_Check_Options;
222 Validity_Check_Default := True;
223 Validity_Check_In_Out_Params := True;
224 Validity_Check_In_Params := True;
226 -- Turn off style check options since we are not interested in any
227 -- front-end warnings when we are getting CodePeer output.
229 Reset_Style_Check_Options;
232 -- Set Configurable_Run_Time mode if system.ads flag set
234 if Targparm.Configurable_Run_Time_On_Target or Debug_Flag_YY then
235 Configurable_Run_Time_Mode := True;
238 -- Set -gnatR3m mode if debug flag A set
240 if Debug_Flag_AA then
241 Back_Annotate_Rep_Info := True;
242 List_Representation_Info := 1;
243 List_Representation_Info_Mechanisms := True;
246 -- Force Target_Strict_Alignment true if debug flag -gnatd.a is set
248 if Debug_Flag_Dot_A then
249 Ttypes.Target_Strict_Alignment := True;
252 -- Disable static allocation of dispatch tables if -gnatd.t or if layout
253 -- is enabled. The front end's layout phase currently treats types that
254 -- have discriminant-dependent arrays as not being static even when a
255 -- discriminant constraint on the type is static, and this leads to
256 -- problems with subtypes of type Ada.Tags.Dispatch_Table_Wrapper. ???
258 if Debug_Flag_Dot_T or else Frontend_Layout_On_Target then
259 Static_Dispatch_Tables := False;
262 -- Flip endian mode if -gnatd8 set
265 Ttypes.Bytes_Big_Endian := not Ttypes.Bytes_Big_Endian;
268 -- Deal with forcing OpenVMS switches True if debug flag M is set, but
269 -- record the setting of Targparm.Open_VMS_On_Target in True_VMS_Target
270 -- before doing this, so we know if we are in real OpenVMS or not!
272 Opt.True_VMS_Target := Targparm.OpenVMS_On_Target;
275 Targparm.OpenVMS_On_Target := True;
276 Hostparm.OpenVMS := True;
279 -- Activate front end layout if debug flag -gnatdF is set
281 if Debug_Flag_FF then
282 Targparm.Frontend_Layout_On_Target := True;
285 -- Set and check exception mechnism
287 if Targparm.ZCX_By_Default_On_Target then
288 if Targparm.GCC_ZCX_Support_On_Target then
289 Exception_Mechanism := Back_End_Exceptions;
291 Osint.Fail ("Zero Cost Exceptions not supported on this target");
295 -- Set proper status for overflow checks. We turn on overflow checks
296 -- if -gnatp was not specified, and either -gnato is set or the back
297 -- end takes care of overflow checks. Otherwise we suppress overflow
298 -- checks by default (since front end checks are expensive).
300 if not Opt.Suppress_Checks
301 and then (Opt.Enable_Overflow_Checks
303 (Targparm.Backend_Divide_Checks_On_Target
305 Targparm.Backend_Overflow_Checks_On_Target))
307 Suppress_Options (Overflow_Check) := False;
309 Suppress_Options (Overflow_Check) := True;
311 end Adjust_Global_Switches;
317 procedure Check_Bad_Body is
318 Sname : Unit_Name_Type;
319 Src_Ind : Source_File_Index;
320 Fname : File_Name_Type;
322 procedure Bad_Body_Error (Msg : String);
323 -- Issue message for bad body found
329 procedure Bad_Body_Error (Msg : String) is
331 Error_Msg_N (Msg, Main_Unit_Node);
332 Error_Msg_File_1 := Fname;
333 Error_Msg_N ("remove incorrect body in file{!", Main_Unit_Node);
336 -- Start of processing for Check_Bad_Body
339 -- Nothing to do if we are only checking syntax, because we don't know
340 -- enough to know if we require or forbid a body in this case.
342 if Operating_Mode = Check_Syntax then
346 -- Check for body not allowed
348 if (Main_Kind = N_Package_Declaration
349 and then not Body_Required (Main_Unit_Node))
350 or else (Main_Kind = N_Generic_Package_Declaration
351 and then not Body_Required (Main_Unit_Node))
352 or else Main_Kind = N_Package_Renaming_Declaration
353 or else Main_Kind = N_Subprogram_Renaming_Declaration
354 or else Nkind (Original_Node (Unit (Main_Unit_Node)))
355 in N_Generic_Instantiation
357 Sname := Unit_Name (Main_Unit);
359 -- If we do not already have a body name, then get the body name
360 -- (but how can we have a body name here ???)
362 if not Is_Body_Name (Sname) then
363 Sname := Get_Body_Name (Sname);
366 Fname := Get_File_Name (Sname, Subunit => False);
367 Src_Ind := Load_Source_File (Fname);
369 -- Case where body is present and it is not a subunit. Exclude
370 -- the subunit case, because it has nothing to do with the
371 -- package we are compiling. It is illegal for a child unit and a
372 -- subunit with the same expanded name (RM 10.2(9)) to appear
373 -- together in a partition, but there is nothing to stop a
374 -- compilation environment from having both, and the test here
375 -- simply allows that. If there is an attempt to include both in
376 -- a partition, this is diagnosed at bind time. In Ada 83 mode
377 -- this is not a warning case.
379 -- Note: if weird file names are being used, we can have
380 -- situation where the file name that supposedly contains body,
381 -- in fact contains a spec, or we can't tell what it contains.
382 -- Skip the error message in these cases.
384 -- Also ignore body that is nothing but pragma No_Body; (that's the
385 -- whole point of this pragma, to be used this way and to cause the
386 -- body file to be ignored in this context).
388 if Src_Ind /= No_Source_File
389 and then Get_Expected_Unit_Type (Fname) = Expect_Body
390 and then not Source_File_Is_Subunit (Src_Ind)
391 and then not Source_File_Is_No_Body (Src_Ind)
393 Errout.Finalize (Last_Call => False);
395 Error_Msg_Unit_1 := Sname;
397 -- Ada 83 case of a package body being ignored. This is not an
398 -- error as far as the Ada 83 RM is concerned, but it is almost
399 -- certainly not what is wanted so output a warning. Give this
400 -- message only if there were no errors, since otherwise it may
401 -- be incorrect (we may have misinterpreted a junk spec as not
402 -- needing a body when it really does).
404 if Main_Kind = N_Package_Declaration
405 and then Ada_Version = Ada_83
406 and then Operating_Mode = Generate_Code
407 and then Distribution_Stub_Mode /= Generate_Caller_Stub_Body
408 and then not Compilation_Errors
411 ("package $$ does not require a body?", Main_Unit_Node);
412 Error_Msg_File_1 := Fname;
413 Error_Msg_N ("body in file{? will be ignored", Main_Unit_Node);
415 -- Ada 95 cases of a body file present when no body is
416 -- permitted. This we consider to be an error.
419 -- For generic instantiations, we never allow a body
421 if Nkind (Original_Node (Unit (Main_Unit_Node)))
422 in N_Generic_Instantiation
425 ("generic instantiation for $$ does not allow a body");
427 -- A library unit that is a renaming never allows a body
429 elsif Main_Kind in N_Renaming_Declaration then
431 ("renaming declaration for $$ does not allow a body!");
433 -- Remaining cases are packages and generic packages. Here
434 -- we only do the test if there are no previous errors,
435 -- because if there are errors, they may lead us to
436 -- incorrectly believe that a package does not allow a body
437 -- when in fact it does.
439 elsif not Compilation_Errors then
440 if Main_Kind = N_Package_Declaration then
442 ("package $$ does not allow a body!");
444 elsif Main_Kind = N_Generic_Package_Declaration then
446 ("generic package $$ does not allow a body!");
459 procedure Check_Rep_Info is
461 if List_Representation_Info /= 0
462 or else List_Representation_Info_Mechanisms
467 ("cannot generate representation information, no code generated");
474 -------------------------
475 -- Check_Library_Items --
476 -------------------------
478 -- Walk_Library_Items has plenty of assertions, so all we need to do is
479 -- call it, just for these assertions, not actually doing anything else.
481 procedure Check_Library_Items is
483 procedure Action (Item : Node_Id);
484 -- Action passed to Walk_Library_Items to do nothing
490 procedure Action (Item : Node_Id) is
495 procedure Walk is new Sem.Walk_Library_Items (Action);
497 -- Start of processing for Check_Library_Items
501 end Check_Library_Items;
503 -- Start of processing for Gnat1drv
506 -- This inner block is set up to catch assertion errors and constraint
507 -- errors. Since the code for handling these errors can cause another
508 -- exception to be raised (namely Unrecoverable_Error), we need two
509 -- nested blocks, so that the outer one handles unrecoverable error.
512 -- Initialize all packages. For the most part, these initialization
513 -- calls can be made in any order. Exceptions are as follows:
515 -- Lib.Initialize need to be called before Scan_Compiler_Arguments,
516 -- because it initializes a table filled by Scan_Compiler_Arguments.
522 Scan_Compiler_Arguments;
523 Osint.Add_Default_Search_Dirs;
542 Sem_Type.Init_Interp_Tables;
544 -- Acquire target parameters from system.ads (source of package System)
549 S : Source_File_Index;
553 Name_Buffer (1 .. 10) := "system.ads";
556 S := Load_Source_File (N);
558 if S = No_Source_File then
560 ("fatal error, run-time library not installed correctly");
562 ("cannot locate file system.ads");
563 raise Unrecoverable_Error;
565 -- Remember source index of system.ads (which was read successfully)
568 System_Source_File_Index := S;
571 Targparm.Get_Target_Parameters
572 (System_Text => Source_Text (S),
573 Source_First => Source_First (S),
574 Source_Last => Source_Last (S));
576 -- Acquire configuration pragma information from Targparm
578 Restrict.Restrictions := Targparm.Restrictions_On_Target;
581 Adjust_Global_Switches;
583 -- Output copyright notice if full list mode unless we have a list
584 -- file, in which case we defer this so that it is output in the file
586 if (Verbose_Mode or else (Full_List and then Full_List_File_Name = null))
587 and then not Debug_Flag_7
591 Write_Str (Gnat_Version_String);
593 Write_Str ("Copyright 1992-" &
595 ", Free Software Foundation, Inc.");
599 -- Check we do not have more than one source file, this happens only in
600 -- the case where the driver is called directly, it cannot happen when
601 -- gnat1 is invoked from gcc in the normal case.
603 if Osint.Number_Of_Files /= 1 then
606 Osint.Fail ("you must provide one source file");
608 elsif Usage_Requested then
612 Original_Operating_Mode := Operating_Mode;
615 -- Exit with errors if the main source could not be parsed
617 if Sinput.Main_Source_File = No_Source_File then
618 Errout.Finalize (Last_Call => True);
619 Errout.Output_Messages;
620 Exit_Program (E_Errors);
623 Main_Unit_Node := Cunit (Main_Unit);
624 Main_Kind := Nkind (Unit (Main_Unit_Node));
627 -- Exit if compilation errors detected
629 Errout.Finalize (Last_Call => False);
631 if Compilation_Errors then
633 Sem_Ch13.Validate_Unchecked_Conversions;
634 Sem_Ch13.Validate_Address_Clauses;
635 Errout.Output_Messages;
638 -- Generate ALI file if specially requested
640 if Opt.Force_ALI_Tree_File then
641 Write_ALI (Object => False);
645 Errout.Finalize (Last_Call => True);
646 Exit_Program (E_Errors);
649 -- Set Generate_Code on main unit and its spec. We do this even if are
650 -- not generating code, since Lib-Writ uses this to determine which
651 -- units get written in the ali file.
653 Set_Generate_Code (Main_Unit);
655 -- If we have a corresponding spec, and it comes from source
656 -- or it is not a generated spec for a child subprogram body,
657 -- then we need object code for the spec unit as well.
659 if Nkind (Unit (Main_Unit_Node)) in N_Unit_Body
660 and then not Acts_As_Spec (Main_Unit_Node)
662 if Nkind (Unit (Main_Unit_Node)) = N_Subprogram_Body
663 and then not Comes_From_Source (Library_Unit (Main_Unit_Node))
668 (Get_Cunit_Unit_Number (Library_Unit (Main_Unit_Node)));
672 -- Case of no code required to be generated, exit indicating no error
674 if Original_Operating_Mode = Check_Syntax then
676 Errout.Finalize (Last_Call => True);
677 Errout.Output_Messages;
682 -- Use a goto instead of calling Exit_Program so that finalization
687 elsif Original_Operating_Mode = Check_Semantics then
688 Back_End_Mode := Declarations_Only;
690 -- All remaining cases are cases in which the user requested that code
691 -- be generated (i.e. no -gnatc or -gnats switch was used). Check if
692 -- we can in fact satisfy this request.
694 -- Cannot generate code if someone has turned off code generation for
695 -- any reason at all. We will try to figure out a reason below.
697 elsif Operating_Mode /= Generate_Code then
698 Back_End_Mode := Skip;
700 -- We can generate code for a subprogram body unless there were missing
701 -- subunits. Note that we always generate code for all generic units (a
702 -- change from some previous versions of GNAT).
704 elsif Main_Kind = N_Subprogram_Body
705 and then not Subunits_Missing
707 Back_End_Mode := Generate_Object;
709 -- We can generate code for a package body unless there are subunits
710 -- missing (note that we always generate code for generic units, which
711 -- is a change from some earlier versions of GNAT).
713 elsif Main_Kind = N_Package_Body
714 and then not Subunits_Missing
716 Back_End_Mode := Generate_Object;
718 -- We can generate code for a package declaration or a subprogram
719 -- declaration only if it does not required a body.
721 elsif (Main_Kind = N_Package_Declaration
723 Main_Kind = N_Subprogram_Declaration)
725 (not Body_Required (Main_Unit_Node)
727 Distribution_Stub_Mode = Generate_Caller_Stub_Body)
729 Back_End_Mode := Generate_Object;
731 -- We can generate code for a generic package declaration of a generic
732 -- subprogram declaration only if does not require a body.
734 elsif (Main_Kind = N_Generic_Package_Declaration
736 Main_Kind = N_Generic_Subprogram_Declaration)
737 and then not Body_Required (Main_Unit_Node)
739 Back_End_Mode := Generate_Object;
741 -- Compilation units that are renamings do not require bodies,
742 -- so we can generate code for them.
744 elsif Main_Kind = N_Package_Renaming_Declaration
745 or else Main_Kind = N_Subprogram_Renaming_Declaration
747 Back_End_Mode := Generate_Object;
749 -- Compilation units that are generic renamings do not require bodies
750 -- so we can generate code for them.
752 elsif Main_Kind in N_Generic_Renaming_Declaration then
753 Back_End_Mode := Generate_Object;
755 -- It's not an error to generate SCIL for e.g. a spec which has a body
757 elsif CodePeer_Mode then
758 Back_End_Mode := Generate_Object;
760 -- In all other cases (specs which have bodies, generics, and bodies
761 -- where subunits are missing), we cannot generate code and we generate
762 -- a warning message. Note that generic instantiations are gone at this
763 -- stage since they have been replaced by their instances.
766 Back_End_Mode := Skip;
769 -- At this stage Back_End_Mode is set to indicate if the backend should
770 -- be called to generate code. If it is Skip, then code generation has
771 -- been turned off, even though code was requested by the original
772 -- command. This is not an error from the user point of view, but it is
773 -- an error from the point of view of the gcc driver, so we must exit
774 -- with an error status.
776 -- We generate an informative message (from the gcc point of view, it
777 -- is an error message, but from the users point of view this is not an
778 -- error, just a consequence of compiling something that cannot
781 if Back_End_Mode = Skip then
783 Write_Str ("cannot generate code for ");
785 Write_Name (Unit_File_Name (Main_Unit));
787 if Subunits_Missing then
788 Write_Str (" (missing subunits)");
790 Write_Str ("to check parent unit");
792 elsif Main_Kind = N_Subunit then
793 Write_Str (" (subunit)");
795 Write_Str ("to check subunit");
797 elsif Main_Kind = N_Subprogram_Declaration then
798 Write_Str (" (subprogram spec)");
800 Write_Str ("to check subprogram spec");
802 -- Generic package body in GNAT implementation mode
804 elsif Main_Kind = N_Package_Body and then GNAT_Mode then
805 Write_Str (" (predefined generic)");
807 Write_Str ("to check predefined generic");
809 -- Only other case is a package spec
812 Write_Str (" (package spec)");
814 Write_Str ("to check package spec");
817 Write_Str (" for errors, use ");
819 if Hostparm.OpenVMS then
820 Write_Str ("/NOLOAD");
822 Write_Str ("-gnatc");
828 Sem_Ch13.Validate_Unchecked_Conversions;
829 Sem_Ch13.Validate_Address_Clauses;
830 Errout.Finalize (Last_Call => True);
831 Errout.Output_Messages;
834 Write_ALI (Object => False);
838 -- Exit program with error indication, to kill object file
840 Exit_Program (E_No_Code);
843 -- In -gnatc mode, we only do annotation if -gnatt or -gnatR is also
844 -- set as indicated by Back_Annotate_Rep_Info being set to True.
846 -- We don't call for annotations on a subunit, because to process those
847 -- the back-end requires that the parent(s) be properly compiled.
849 -- Annotation is suppressed for targets where front-end layout is
850 -- enabled, because the front end determines representations.
852 -- Annotation is also suppressed in the case of compiling for
853 -- a VM, since representations are largely symbolic there.
855 if Back_End_Mode = Declarations_Only
856 and then (not (Back_Annotate_Rep_Info or Generate_SCIL)
857 or else Main_Kind = N_Subunit
858 or else Targparm.Frontend_Layout_On_Target
859 or else Targparm.VM_Target /= No_VM)
861 Sem_Ch13.Validate_Unchecked_Conversions;
862 Sem_Ch13.Validate_Address_Clauses;
863 Errout.Finalize (Last_Call => True);
864 Errout.Output_Messages;
865 Write_ALI (Object => False);
873 -- Ensure that we properly register a dependency on system.ads, since
874 -- even if we do not semantically depend on this, Targparm has read
875 -- system parameters from the system.ads file.
877 Lib.Writ.Ensure_System_Dependency;
879 -- Add dependencies, if any, on preprocessing data file and on
880 -- preprocessing definition file(s).
882 Prepcomp.Add_Dependencies;
884 -- Back end needs to explicitly unlock tables it needs to touch
897 -- ???Check_Library_Items under control of a debug flag, because it
898 -- currently does not work if the -gnatn switch (back end inlining) is
901 if Debug_Flag_Dot_WW then
905 -- Here we call the back end to generate the output code
907 Generating_Code := True;
908 Back_End.Call_Back_End (Back_End_Mode);
910 -- Once the backend is complete, we unlock the names table. This call
911 -- allows a few extra entries, needed for example for the file name for
912 -- the library file output.
916 -- Validate unchecked conversions (using the values for size and
917 -- alignment annotated by the backend where possible).
919 Sem_Ch13.Validate_Unchecked_Conversions;
921 -- Validate address clauses (again using alignment values annotated
922 -- by the backend where possible).
924 Sem_Ch13.Validate_Address_Clauses;
926 -- Now we complete output of errors, rep info and the tree info. These
927 -- are delayed till now, since it is perfectly possible for gigi to
928 -- generate errors, modify the tree (in particular by setting flags
929 -- indicating that elaboration is required, and also to back annotate
930 -- representation information for List_Rep_Info.
932 Errout.Finalize (Last_Call => True);
933 Errout.Output_Messages;
936 -- Only write the library if the backend did not generate any error
937 -- messages. Otherwise signal errors to the driver program so that
938 -- there will be no attempt to generate an object file.
940 if Compilation_Errors then
942 Exit_Program (E_Errors);
945 Write_ALI (Object => (Back_End_Mode = Generate_Object));
947 -- Generate the ASIS tree after writing the ALI file, since in ASIS
948 -- mode, Write_ALI may in fact result in further tree decoration from
949 -- the original tree file. Note that we dump the tree just before
950 -- generating it, so that the dump will exactly reflect what is written
956 -- Finalize name table and we are all done
961 -- Handle fatal internal compiler errors
963 when Rtsfind.RE_Not_Available =>
964 Comperr.Compiler_Abort ("RE_Not_Available");
966 when System.Assertions.Assert_Failure =>
967 Comperr.Compiler_Abort ("Assert_Failure");
969 when Constraint_Error =>
970 Comperr.Compiler_Abort ("Constraint_Error");
972 when Program_Error =>
973 Comperr.Compiler_Abort ("Program_Error");
975 when Storage_Error =>
977 -- Assume this is a bug. If it is real, the message will in any case
978 -- say Storage_Error, giving a strong hint!
980 Comperr.Compiler_Abort ("Storage_Error");
986 -- The outer exception handles an unrecoverable error
989 when Unrecoverable_Error =>
990 Errout.Finalize (Last_Call => True);
991 Errout.Output_Messages;
994 Write_Str ("compilation abandoned");
1000 Exit_Program (E_Errors);