with Opt; use Opt;
with Osint; use Osint;
with Output; use Output;
+with Par_SCO;
with Prepcomp;
with Repinfo; use Repinfo;
with Restrict;
with Rtsfind;
+with SCOs;
with Sem;
with Sem_Ch8;
with Sem_Ch12;
with Snames;
with Sprint; use Sprint;
with Stringt;
+with Stylesw; use Stylesw;
with Targparm; use Targparm;
with Tree_Gen;
with Treepr; use Treepr;
with Uname; use Uname;
with Urealp;
with Usage;
+with Validsw; use Validsw;
with System.Assertions;
Back_End_Mode : Back_End.Back_End_Mode_Type;
-- Record back end mode
+ procedure Adjust_Global_Switches;
+ -- There are various interactions between front end switch settings,
+ -- including debug switch settings and target dependent parameters.
+ -- This procedure takes care of properly handling these interactions.
+ -- We do it after scanning out all the switches, so that we are not
+ -- depending on the order in which switches appear.
+
procedure Check_Bad_Body;
-- Called to check if the unit we are compiling has a bad body
pragma Warnings (Off, Check_Library_Items);
-- In case the call below is commented out
+ ----------------------------
+ -- Adjust_Global_Switches --
+ ----------------------------
+
+ procedure Adjust_Global_Switches is
+ begin
+ -- Debug flag -gnatd.I is a synonym for Generate_SCIL and requires code
+ -- generation.
+
+ if Debug_Flag_Dot_II
+ and then Operating_Mode = Generate_Code
+ then
+ Generate_SCIL := True;
+ end if;
+
+ -- Set ASIS mode if -gnatt and -gnatc are set
+
+ if Operating_Mode = Check_Semantics and then Tree_Output then
+ ASIS_Mode := True;
+
+ -- Turn off inlining in ASIS mode, since ASIS cannot handle the extra
+ -- information in the trees caused by inlining being active.
+
+ -- More specifically, the tree seems to be malformed from the ASIS
+ -- point of view if -gnatc and -gnatn appear together???
+
+ Inline_Active := False;
+
+ -- Turn off SCIL generation in ASIS mode, since SCIL requires front-
+ -- end expansion.
+
+ Generate_SCIL := False;
+ end if;
+
+ -- SCIL mode needs to disable front-end inlining since the generated
+ -- trees (in particular order and consistency between specs compiled
+ -- as part of a main unit or as part of a with-clause) are causing
+ -- troubles.
+
+ if Generate_SCIL then
+ Front_End_Inlining := False;
+ end if;
+
+ -- Tune settings for optimal SCIL generation in CodePeer_Mode
+
+ if CodePeer_Mode then
+
+ -- Turn off inlining, confuses CodePeer output and gains nothing
+
+ Front_End_Inlining := False;
+ Inline_Active := False;
+
+ -- Turn off ASIS mode: incompatible with front-end expansion
+
+ ASIS_Mode := False;
+
+ -- Disable front-end optimizations, to keep the tree as close to the
+ -- source code as possible, and also to avoid inconsistencies between
+ -- trees when using different optimization switches.
+
+ Optimization_Level := 0;
+
+ -- Disable specific expansions for Restrictions pragmas to avoid
+ -- tree inconsistencies between compilations with different pragmas
+ -- that will cause different SCIL files to be generated for the
+ -- same Ada spec.
+
+ Treat_Restrictions_As_Warnings := True;
+
+ -- Suppress overflow, division by zero and access checks since they
+ -- are handled implicitly by CodePeer.
+
+ -- Turn off dynamic elaboration checks: generates inconsistencies in
+ -- trees between specs compiled as part of a main unit or as part of
+ -- a with-clause.
+
+ -- Turn off alignment checks: these cannot be proved statically by
+ -- CodePeer and generate false positives.
+
+ -- Enable all other language checks
+
+ Suppress_Options :=
+ (Access_Check => True,
+ Alignment_Check => True,
+ Division_Check => True,
+ Elaboration_Check => True,
+ Overflow_Check => True,
+ others => False);
+ Enable_Overflow_Checks := False;
+ Dynamic_Elaboration_Checks := False;
+
+ -- Kill debug of generated code, since it messes up sloc values
+
+ Debug_Generated_Code := False;
+
+ -- Turn cross-referencing on in case it was disabled (by e.g. -gnatD)
+ -- Do we really need to spend time generating xref in CodePeer
+ -- mode??? Consider setting Xref_Active to False.
+
+ Xref_Active := True;
+
+ -- Polling mode forced off, since it generates confusing junk
+
+ Polling_Required := False;
+
+ -- Set operating mode to Generate_Code to benefit from full
+ -- front-end expansion (e.g. generics).
+
+ Operating_Mode := Generate_Code;
+
+ -- We need SCIL generation of course
+
+ Generate_SCIL := True;
+
+ -- Enable assertions and debug pragmas, since they give CodePeer
+ -- valuable extra information.
+
+ Assertions_Enabled := True;
+ Debug_Pragmas_Enabled := True;
+
+ -- Suppress compiler warnings, since what we are interested in here
+ -- is what CodePeer can find out. Also disable all simple value
+ -- propagation. This is an optimization which is valuable for code
+ -- optimization, and also for generation of compiler warnings, but
+ -- these are being turned off anyway, and CodePeer understands
+ -- things more clearly if references are not optimized in this way.
+
+ Warning_Mode := Suppress;
+ Debug_Flag_MM := True;
+
+ -- Set normal RM validity checking, and checking of IN OUT parameters
+ -- (this might give CodePeer more useful checks to analyze, to be
+ -- confirmed???). All other validity checking is turned off, since
+ -- this can generate very complex trees that only confuse CodePeer
+ -- and do not bring enough useful info.
+
+ Reset_Validity_Check_Options;
+ Validity_Check_Default := True;
+ Validity_Check_In_Out_Params := True;
+ Validity_Check_In_Params := True;
+
+ -- Turn off style check options since we are not interested in any
+ -- front-end warnings when we are getting CodePeer output.
+
+ Reset_Style_Check_Options;
+ end if;
+
+ -- 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;
+
+ -- Force Target_Strict_Alignment true if debug flag -gnatd.a is set
+
+ if Debug_Flag_Dot_A then
+ Ttypes.Target_Strict_Alignment := True;
+ end if;
+
+ -- Disable static allocation of dispatch tables if -gnatd.t or if layout
+ -- is enabled. The front end's layout phase currently treats types that
+ -- have discriminant-dependent arrays as not being static even when a
+ -- discriminant constraint on the type is static, and this leads to
+ -- problems with subtypes of type Ada.Tags.Dispatch_Table_Wrapper. ???
+
+ if Debug_Flag_Dot_T or else Frontend_Layout_On_Target then
+ Static_Dispatch_Tables := False;
+ end if;
+
+ -- Flip endian mode if -gnatd8 set
+
+ if Debug_Flag_8 then
+ Ttypes.Bytes_Big_Endian := not Ttypes.Bytes_Big_Endian;
+ end if;
+
+ -- Deal with forcing OpenVMS switches True if debug flag M is set, but
+ -- record the setting of Targparm.Open_VMS_On_Target in True_VMS_Target
+ -- before doing this, so we know if we are in real OpenVMS or not!
+
+ Opt.True_VMS_Target := Targparm.OpenVMS_On_Target;
+
+ if Debug_Flag_M then
+ Targparm.OpenVMS_On_Target := True;
+ Hostparm.OpenVMS := True;
+ end if;
+
+ -- Activate front end layout if debug flag -gnatdF is set
+
+ if Debug_Flag_FF then
+ Targparm.Frontend_Layout_On_Target := True;
+ end if;
+
+ -- Set and check exception mechnism
+
+ 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;
+ end Adjust_Global_Switches;
+
--------------------
-- Check_Bad_Body --
--------------------
end if;
end Check_Bad_Body;
- --------------------
- -- Check_Rep_Info --
- --------------------
-
- procedure Check_Rep_Info is
- begin
- if List_Representation_Info /= 0
- or else List_Representation_Info_Mechanisms
- then
- Set_Standard_Error;
- Write_Eol;
- Write_Str
- ("cannot generate representation information, no code generated");
- Write_Eol;
- Write_Eol;
- Set_Standard_Output;
- end if;
- end Check_Rep_Info;
-
-------------------------
-- Check_Library_Items --
-------------------------
Walk;
end Check_Library_Items;
+ --------------------
+ -- Check_Rep_Info --
+ --------------------
+
+ procedure Check_Rep_Info is
+ begin
+ if List_Representation_Info /= 0
+ or else List_Representation_Info_Mechanisms
+ then
+ Set_Standard_Error;
+ Write_Eol;
+ Write_Str
+ ("cannot generate representation information, no code generated");
+ Write_Eol;
+ Write_Eol;
+ Set_Standard_Output;
+ end if;
+ end Check_Rep_Info;
+
-- Start of processing for Gnat1drv
begin
-- nested blocks, so that the outer one handles unrecoverable error.
begin
+ -- Initialize all packages. For the most part, these initialization
+ -- calls can be made in any order. Exceptions are as follows:
+
-- Lib.Initialize need to be called before Scan_Compiler_Arguments,
-- because it initializes a table filled by Scan_Compiler_Arguments.
Urealp.Initialize;
Errout.Initialize;
Namet.Initialize;
+ SCOs.Initialize;
Snames.Initialize;
Stringt.Initialize;
Inline.Initialize;
+ Par_SCO.Initialize;
Sem_Ch8.Initialize;
Sem_Ch12.Initialize;
Sem_Ch13.Initialize;
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;
-
- -- Force Target_Strict_Alignment true if debug flag -gnatd.a is set
-
- if Debug_Flag_Dot_A then
- Ttypes.Target_Strict_Alignment := True;
- end if;
-
- -- Disable static allocation of dispatch tables if -gnatd.t or if layout
- -- is enabled. The front end's layout phase currently treats types that
- -- have discriminant-dependent arrays as not being static even when a
- -- discriminant constraint on the type is static, and this leads to
- -- problems with subtypes of type Ada.Tags.Dispatch_Table_Wrapper. ???
-
- if Debug_Flag_Dot_T or else Frontend_Layout_On_Target then
- Static_Dispatch_Tables := False;
- end if;
+ Adjust_Global_Switches;
-- Output copyright notice if full list mode unless we have a list
-- file, in which case we defer this so that it is output in the file
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;
-
- -- Deal with forcing OpenVMS switches Ture if debug flag M is set, but
- -- record the setting of Targparm.Open_VMS_On_Target in True_VMS_Target
- -- before doing this.
-
- Opt.True_VMS_Target := Targparm.OpenVMS_On_Target;
-
- 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 do not have more than 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.
elsif Main_Kind in N_Generic_Renaming_Declaration then
Back_End_Mode := Generate_Object;
+ -- It's not an error to generate SCIL for e.g. a spec which has a body
+
+ elsif CodePeer_Mode 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
-- a VM, since representations are largely symbolic there.
if Back_End_Mode = Declarations_Only
- and then (not Back_Annotate_Rep_Info
+ and then (not (Back_Annotate_Rep_Info or Generate_SCIL)
or else Main_Kind = N_Subunit
or else Targparm.Frontend_Layout_On_Target
or else Targparm.VM_Target /= No_VM)
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