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Diffstat (limited to 'gcc-4.2.1/gcc/ada/gnat1drv.adb')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/gnat1drv.adb | 710 |
1 files changed, 0 insertions, 710 deletions
diff --git a/gcc-4.2.1/gcc/ada/gnat1drv.adb b/gcc-4.2.1/gcc/ada/gnat1drv.adb deleted file mode 100644 index 44c58d0fc..000000000 --- a/gcc-4.2.1/gcc/ada/gnat1drv.adb +++ /dev/null @@ -1,710 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT COMPILER COMPONENTS -- --- -- --- G N A T 1 D R V -- --- -- --- B o d y -- --- -- --- Copyright (C) 1992-2006 Free Software Foundation, Inc. -- --- -- --- GNAT is free software; you can redistribute it and/or modify it under -- --- terms of the GNU General Public License as published by the Free Soft- -- --- ware Foundation; either version 2, or (at your option) any later ver- -- --- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- --- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- --- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- --- for more details. You should have received a copy of the GNU General -- --- Public License distributed with GNAT; see file COPYING. If not, write -- --- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- --- Boston, MA 02110-1301, USA. -- --- -- --- GNAT was originally developed by the GNAT team at New York University. -- --- Extensive contributions were provided by Ada Core Technologies Inc. -- --- -- ------------------------------------------------------------------------------- - -with Atree; use Atree; -with Back_End; use Back_End; -with Comperr; -with Csets; use Csets; -with Debug; use Debug; -with Elists; -with Errout; use Errout; -with Fmap; -with Fname; use Fname; -with Fname.UF; use Fname.UF; -with Frontend; -with Gnatvsn; use Gnatvsn; -with Hostparm; -with Inline; -with Lib; use Lib; -with Lib.Writ; use Lib.Writ; -with Lib.Xref; -with Namet; use Namet; -with Nlists; -with Opt; use Opt; -with Osint; use Osint; -with Output; use Output; -with Prepcomp; -with Repinfo; use Repinfo; -with Restrict; -with Sem; -with Sem_Ch8; -with Sem_Ch12; -with Sem_Ch13; -with Sem_Elim; -with Sem_Eval; -with Sem_Type; -with Sinfo; use Sinfo; -with Sinput.L; use Sinput.L; -with Snames; -with Sprint; use Sprint; -with Stringt; -with Targparm; -with Tree_Gen; -with Treepr; use Treepr; -with Ttypes; -with Types; use Types; -with Uintp; use Uintp; -with Uname; use Uname; -with Urealp; -with Usage; - -with System.Assertions; - -procedure Gnat1drv is - Main_Unit_Node : Node_Id; - -- Compilation unit node for main unit - - Main_Kind : Node_Kind; - -- Kind of main compilation unit node - - Back_End_Mode : Back_End.Back_End_Mode_Type; - -- Record back end mode - -begin - -- This inner block is set up to catch assertion errors and constraint - -- errors. Since the code for handling these errors can cause another - -- exception to be raised (namely Unrecoverable_Error), we need two - -- nested blocks, so that the outer one handles unrecoverable error. - - begin - -- Lib.Initialize need to be called before Scan_Compiler_Arguments, - -- because it initialize a table that is filled by - -- Scan_Compiler_Arguments. - - Osint.Initialize; - Fmap.Reset_Tables; - Lib.Initialize; - Lib.Xref.Initialize; - Scan_Compiler_Arguments; - Osint.Add_Default_Search_Dirs; - - Nlists.Initialize; - Sinput.Initialize; - Sem.Initialize; - Csets.Initialize; - Uintp.Initialize; - Urealp.Initialize; - Errout.Initialize; - Namet.Initialize; - Snames.Initialize; - Stringt.Initialize; - Inline.Initialize; - Sem_Ch8.Initialize; - Sem_Ch12.Initialize; - Sem_Ch13.Initialize; - Sem_Elim.Initialize; - Sem_Eval.Initialize; - Sem_Type.Init_Interp_Tables; - - -- Acquire target parameters from system.ads (source of package System) - - declare - use Sinput; - - S : Source_File_Index; - N : Name_Id; - - begin - Name_Buffer (1 .. 10) := "system.ads"; - Name_Len := 10; - N := Name_Find; - S := Load_Source_File (N); - - if S = No_Source_File then - Write_Line - ("fatal error, run-time library not installed correctly"); - Write_Line - ("cannot locate file system.ads"); - raise Unrecoverable_Error; - - -- Remember source index of system.ads (which was read successfully) - - else - System_Source_File_Index := S; - end if; - - Targparm.Get_Target_Parameters - (System_Text => Source_Text (S), - Source_First => Source_First (S), - Source_Last => Source_Last (S)); - - -- Acquire configuration pragma information from Targparm - - Restrict.Restrictions := Targparm.Restrictions_On_Target; - end; - - -- Set Configurable_Run_Time mode if system.ads flag set - - if Targparm.Configurable_Run_Time_On_Target or Debug_Flag_YY then - Configurable_Run_Time_Mode := True; - end if; - - -- Set -gnatR3m mode if debug flag A set - - if Debug_Flag_AA then - Back_Annotate_Rep_Info := True; - List_Representation_Info := 1; - List_Representation_Info_Mechanisms := True; - end if; - - -- Output copyright notice if full list mode - - if (Verbose_Mode or Full_List) - and then (not Debug_Flag_7) - then - Write_Eol; - Write_Str ("GNAT "); - Write_Str (Gnat_Version_String); - Write_Eol; - Write_Str ("Copyright 1992-" & - Current_Year & - ", Free Software Foundation, Inc."); - Write_Eol; - end if; - - -- Before we do anything else, adjust certain global values for - -- debug switches which modify their normal natural settings. - - if Debug_Flag_8 then - Ttypes.Bytes_Big_Endian := not Ttypes.Bytes_Big_Endian; - end if; - - if Debug_Flag_M then - Targparm.OpenVMS_On_Target := True; - Hostparm.OpenVMS := True; - end if; - - if Debug_Flag_FF then - Targparm.Frontend_Layout_On_Target := True; - end if; - - -- We take the default exception mechanism into account - - if Targparm.ZCX_By_Default_On_Target then - if Targparm.GCC_ZCX_Support_On_Target then - Exception_Mechanism := Back_End_Exceptions; - else - Osint.Fail - ("Zero Cost Exceptions not supported on this target"); - end if; - end if; - - -- Set proper status for overflow checks. We turn on overflow checks - -- if -gnatp was not specified, and either -gnato is set or the back - -- end takes care of overflow checks. Otherwise we suppress overflow - -- checks by default (since front end checks are expensive). - - if not Opt.Suppress_Checks - and then (Opt.Enable_Overflow_Checks - or else - (Targparm.Backend_Divide_Checks_On_Target - and - Targparm.Backend_Overflow_Checks_On_Target)) - then - Suppress_Options (Overflow_Check) := False; - else - Suppress_Options (Overflow_Check) := True; - end if; - - -- Check we have exactly one source file, this happens only in the case - -- where the driver is called directly, it cannot happen when gnat1 is - -- invoked from gcc in the normal case. - - if Osint.Number_Of_Files /= 1 then - Usage; - Write_Eol; - Osint.Fail ("you must provide one source file"); - - elsif Usage_Requested then - Usage; - end if; - - Original_Operating_Mode := Operating_Mode; - Frontend; - Main_Unit_Node := Cunit (Main_Unit); - Main_Kind := Nkind (Unit (Main_Unit_Node)); - - -- Check for suspicious or incorrect body present if we are doing - -- semantic checking. We omit this check in syntax only mode, because - -- in that case we do not know if we need a body or not. - - if Operating_Mode /= Check_Syntax - and then - ((Main_Kind = N_Package_Declaration - and then not Body_Required (Main_Unit_Node)) - or else (Main_Kind = N_Generic_Package_Declaration - and then not Body_Required (Main_Unit_Node)) - or else Main_Kind = N_Package_Renaming_Declaration - or else Main_Kind = N_Subprogram_Renaming_Declaration - or else Nkind (Original_Node (Unit (Main_Unit_Node))) - in N_Generic_Instantiation) - then - Bad_Body : declare - Sname : Unit_Name_Type := Unit_Name (Main_Unit); - Src_Ind : Source_File_Index; - Fname : File_Name_Type; - - procedure Bad_Body_Error (Msg : String); - -- Issue message for bad body found - - -------------------- - -- Bad_Body_Error -- - -------------------- - - procedure Bad_Body_Error (Msg : String) is - begin - Error_Msg_N (Msg, Main_Unit_Node); - Error_Msg_Name_1 := Fname; - Error_Msg_N - ("remove incorrect body in file{!", Main_Unit_Node); - end Bad_Body_Error; - - -- Start of processing for Bad_Body - - begin - Sname := Unit_Name (Main_Unit); - - -- If we do not already have a body name, then get the body name - -- (but how can we have a body name here ???) - - if not Is_Body_Name (Sname) then - Sname := Get_Body_Name (Sname); - end if; - - Fname := Get_File_Name (Sname, Subunit => False); - Src_Ind := Load_Source_File (Fname); - - -- Case where body is present and it is not a subunit. Exclude - -- the subunit case, because it has nothing to do with the - -- package we are compiling. It is illegal for a child unit and a - -- subunit with the same expanded name (RM 10.2(9)) to appear - -- together in a partition, but there is nothing to stop a - -- compilation environment from having both, and the test here - -- simply allows that. If there is an attempt to include both in - -- a partition, this is diagnosed at bind time. In Ada 83 mode - -- this is not a warning case. - - -- Note: if weird file names are being used, we can have - -- situation where the file name that supposedly contains body, - -- in fact contains a spec, or we can't tell what it contains. - -- Skip the error message in these cases. - - if Src_Ind /= No_Source_File - and then Get_Expected_Unit_Type (Fname) = Expect_Body - and then not Source_File_Is_Subunit (Src_Ind) - then - Error_Msg_Name_1 := Sname; - - -- Ada 83 case of a package body being ignored. This is not an - -- error as far as the Ada 83 RM is concerned, but it is - -- almost certainly not what is wanted so output a warning. - -- Give this message only if there were no errors, since - -- otherwise it may be incorrect (we may have misinterpreted a - -- junk spec as not needing a body when it really does). - - if Main_Kind = N_Package_Declaration - and then Ada_Version = Ada_83 - and then Operating_Mode = Generate_Code - and then Distribution_Stub_Mode /= Generate_Caller_Stub_Body - and then not Compilation_Errors - then - Error_Msg_N - ("package % does not require a body?", Main_Unit_Node); - Error_Msg_Name_1 := Fname; - Error_Msg_N - ("body in file{? will be ignored", Main_Unit_Node); - - -- Ada 95 cases of a body file present when no body is - -- permitted. This we consider to be an error. - - else - -- For generic instantiations, we never allow a body - - if Nkind (Original_Node (Unit (Main_Unit_Node))) - in N_Generic_Instantiation - then - Bad_Body_Error - ("generic instantiation for % does not allow a body"); - - -- A library unit that is a renaming never allows a body - - elsif Main_Kind in N_Renaming_Declaration then - Bad_Body_Error - ("renaming declaration for % does not allow a body!"); - - -- Remaining cases are packages and generic packages. Here - -- we only do the test if there are no previous errors, - -- because if there are errors, they may lead us to - -- incorrectly believe that a package does not allow a body - -- when in fact it does. - - elsif not Compilation_Errors then - if Main_Kind = N_Package_Declaration then - Bad_Body_Error - ("package % does not allow a body!"); - - elsif Main_Kind = N_Generic_Package_Declaration then - Bad_Body_Error - ("generic package % does not allow a body!"); - end if; - end if; - - end if; - end if; - end Bad_Body; - end if; - - -- Exit if compilation errors detected - - if Compilation_Errors then - Treepr.Tree_Dump; - Sem_Ch13.Validate_Unchecked_Conversions; - Errout.Finalize; - Namet.Finalize; - - -- Generate ALI file if specially requested - - if Opt.Force_ALI_Tree_File then - Write_ALI (Object => False); - Tree_Gen; - end if; - - Exit_Program (E_Errors); - end if; - - -- Set Generate_Code on main unit and its spec. We do this even if are - -- not generating code, since Lib-Writ uses this to determine which - -- units get written in the ali file. - - Set_Generate_Code (Main_Unit); - - -- If we have a corresponding spec, then we need object - -- code for the spec unit as well - - if Nkind (Unit (Main_Unit_Node)) in N_Unit_Body - and then not Acts_As_Spec (Main_Unit_Node) - then - Set_Generate_Code - (Get_Cunit_Unit_Number (Library_Unit (Main_Unit_Node))); - end if; - - -- Case of no code required to be generated, exit indicating no error - - if Original_Operating_Mode = Check_Syntax then - Treepr.Tree_Dump; - Errout.Finalize; - Tree_Gen; - Namet.Finalize; - - -- Use a goto instead of calling Exit_Program so that finalization - -- occurs normally. - - goto End_Of_Program; - - elsif Original_Operating_Mode = Check_Semantics then - Back_End_Mode := Declarations_Only; - - -- All remaining cases are cases in which the user requested that code - -- be generated (i.e. no -gnatc or -gnats switch was used). Check if - -- we can in fact satisfy this request. - - -- Cannot generate code if someone has turned off code generation for - -- any reason at all. We will try to figure out a reason below. - - elsif Operating_Mode /= Generate_Code then - Back_End_Mode := Skip; - - -- We can generate code for a subprogram body unless there were missing - -- subunits. Note that we always generate code for all generic units (a - -- change from some previous versions of GNAT). - - elsif Main_Kind = N_Subprogram_Body - and then not Subunits_Missing - then - Back_End_Mode := Generate_Object; - - -- We can generate code for a package body unless there are subunits - -- missing (note that we always generate code for generic units, which - -- is a change from some earlier versions of GNAT). - - elsif Main_Kind = N_Package_Body - and then not Subunits_Missing - then - Back_End_Mode := Generate_Object; - - -- We can generate code for a package declaration or a subprogram - -- declaration only if it does not required a body. - - elsif (Main_Kind = N_Package_Declaration - or else - Main_Kind = N_Subprogram_Declaration) - and then - (not Body_Required (Main_Unit_Node) - or else - Distribution_Stub_Mode = Generate_Caller_Stub_Body) - then - Back_End_Mode := Generate_Object; - - -- We can generate code for a generic package declaration of a generic - -- subprogram declaration only if does not require a body. - - elsif (Main_Kind = N_Generic_Package_Declaration - or else - Main_Kind = N_Generic_Subprogram_Declaration) - and then not Body_Required (Main_Unit_Node) - then - Back_End_Mode := Generate_Object; - - -- Compilation units that are renamings do not require bodies, - -- so we can generate code for them. - - elsif Main_Kind = N_Package_Renaming_Declaration - or else Main_Kind = N_Subprogram_Renaming_Declaration - then - Back_End_Mode := Generate_Object; - - -- Compilation units that are generic renamings do not require bodies - -- so we can generate code for them. - - elsif Main_Kind in N_Generic_Renaming_Declaration then - Back_End_Mode := Generate_Object; - - -- In all other cases (specs which have bodies, generics, and bodies - -- where subunits are missing), we cannot generate code and we generate - -- a warning message. Note that generic instantiations are gone at this - -- stage since they have been replaced by their instances. - - else - Back_End_Mode := Skip; - end if; - - -- At this stage Call_Back_End is set to indicate if the backend should - -- be called to generate code. If it is not set, then code generation - -- has been turned off, even though code was requested by the original - -- command. This is not an error from the user point of view, but it is - -- an error from the point of view of the gcc driver, so we must exit - -- with an error status. - - -- We generate an informative message (from the gcc point of view, it - -- is an error message, but from the users point of view this is not an - -- error, just a consequence of compiling something that cannot - -- generate code). - - if Back_End_Mode = Skip then - Write_Str ("cannot generate code for "); - Write_Str ("file "); - Write_Name (Unit_File_Name (Main_Unit)); - - if Subunits_Missing then - Write_Str (" (missing subunits)"); - Write_Eol; - Write_Str ("to check parent unit"); - - elsif Main_Kind = N_Subunit then - Write_Str (" (subunit)"); - Write_Eol; - Write_Str ("to check subunit"); - - elsif Main_Kind = N_Subprogram_Declaration then - Write_Str (" (subprogram spec)"); - Write_Eol; - Write_Str ("to check subprogram spec"); - - -- Generic package body in GNAT implementation mode - - elsif Main_Kind = N_Package_Body and then GNAT_Mode then - Write_Str (" (predefined generic)"); - Write_Eol; - Write_Str ("to check predefined generic"); - - -- Only other case is a package spec - - else - Write_Str (" (package spec)"); - Write_Eol; - Write_Str ("to check package spec"); - end if; - - Write_Str (" for errors, use "); - - if Hostparm.OpenVMS then - Write_Str ("/NOLOAD"); - else - Write_Str ("-gnatc"); - end if; - - Write_Eol; - - Sem_Ch13.Validate_Unchecked_Conversions; - Errout.Finalize; - Treepr.Tree_Dump; - Tree_Gen; - Write_ALI (Object => False); - Namet.Finalize; - - -- Exit program with error indication, to kill object file - - Exit_Program (E_No_Code); - end if; - - -- In -gnatc mode, we only do annotation if -gnatt or -gnatR is also - -- set as indicated by Back_Annotate_Rep_Info being set to True. - - -- We don't call for annotations on a subunit, because to process those - -- the back-end requires that the parent(s) be properly compiled. - - -- Annotation is suppressed for targets where front-end layout is - -- enabled, because the front end determines representations. - - -- Annotation is also suppressed in the case of compiling for - -- the Java VM, since representations are largely symbolic there. - - if Back_End_Mode = Declarations_Only - and then (not Back_Annotate_Rep_Info - or else Main_Kind = N_Subunit - or else Targparm.Frontend_Layout_On_Target - or else Hostparm.Java_VM) - then - Sem_Ch13.Validate_Unchecked_Conversions; - Errout.Finalize; - Write_ALI (Object => False); - Tree_Dump; - Tree_Gen; - Namet.Finalize; - return; - end if; - - -- Ensure that we properly register a dependency on system.ads, since - -- even if we do not semantically depend on this, Targparm has read - -- system parameters from the system.ads file. - - Lib.Writ.Ensure_System_Dependency; - - -- Add dependencies, if any, on preprocessing data file and on - -- preprocessing definition file(s). - - Prepcomp.Add_Dependencies; - - -- Back end needs to explicitly unlock tables it needs to touch - - Atree.Lock; - Elists.Lock; - Fname.UF.Lock; - Inline.Lock; - Lib.Lock; - Nlists.Lock; - Sem.Lock; - Sinput.Lock; - Namet.Lock; - Stringt.Lock; - - -- Here we call the back end to generate the output code - - Back_End.Call_Back_End (Back_End_Mode); - - -- Once the backend is complete, we unlock the names table. This call - -- allows a few extra entries, needed for example for the file name for - -- the library file output. - - Namet.Unlock; - - -- Validate unchecked conversions (using the values for size and - -- alignment annotated by the backend where possible). - - Sem_Ch13.Validate_Unchecked_Conversions; - - -- Now we complete output of errors, rep info and the tree info. These - -- are delayed till now, since it is perfectly possible for gigi to - -- generate errors, modify the tree (in particular by setting flags - -- indicating that elaboration is required, and also to back annotate - -- representation information for List_Rep_Info. - - Errout.Finalize; - List_Rep_Info; - - -- Only write the library if the backend did not generate any error - -- messages. Otherwise signal errors to the driver program so that - -- there will be no attempt to generate an object file. - - if Compilation_Errors then - Treepr.Tree_Dump; - Exit_Program (E_Errors); - end if; - - Write_ALI (Object => (Back_End_Mode = Generate_Object)); - - -- Generate the ASIS tree after writing the ALI file, since in ASIS - -- mode, Write_ALI may in fact result in further tree decoration from - -- the original tree file. Note that we dump the tree just before - -- generating it, so that the dump will exactly reflect what is written - -- out. - - Treepr.Tree_Dump; - Tree_Gen; - - -- Finalize name table and we are all done - - Namet.Finalize; - - exception - -- Handle fatal internal compiler errors - - when System.Assertions.Assert_Failure => - Comperr.Compiler_Abort ("Assert_Failure"); - - when Constraint_Error => - Comperr.Compiler_Abort ("Constraint_Error"); - - when Program_Error => - Comperr.Compiler_Abort ("Program_Error"); - - when Storage_Error => - - -- Assume this is a bug. If it is real, the message will in any case - -- say Storage_Error, giving a strong hint! - - Comperr.Compiler_Abort ("Storage_Error"); - end; - - <<End_Of_Program>> - null; - - -- The outer exception handles an unrecoverable error - -exception - when Unrecoverable_Error => - Errout.Finalize; - - Set_Standard_Error; - Write_Str ("compilation abandoned"); - Write_Eol; - - Set_Standard_Output; - Source_Dump; - Tree_Dump; - Exit_Program (E_Errors); - -end Gnat1drv; |