-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2015, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2016, 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- --
-- dG Generate all warnings including those normally suppressed
-- dH Hold (kill) call to gigi
-- dI Inhibit internal name numbering in gnatG listing
- -- dJ Output debugging trace info for JGNAT (Java VM version of GNAT)
+ -- dJ
-- dK Kill all error messages
-- dL Output trace information on elaboration checking
-- dM Assume all variables are modified (no current values)
-- dN No file name information in exception messages
-- dO Output immediate error messages
-- dP Do not check for controlled objects in preelaborable packages
- -- dQ
+ -- dQ Use old secondary stack method
-- dR Bypass check for correct version of s-rpc
-- dS Never convert numbers to machine numbers in Sem_Eval
-- dT Convert to machine numbers only for constant declarations
-- d.h Minimize the creation of public internal symbols for concatenation
-- d.i Ignore Warnings pragmas
-- d.j Generate listing of frontend inlined calls
- -- d.k
+ -- d.k Kill referenced run-time library unit line numbers
-- d.l Use Ada 95 semantics for limited function returns
-- d.m For -gnatl, print full source only for main unit
-- d.n Print source file names
- -- d.o Generate .NET listing of CIL code
- -- d.p Enable the .NET CIL verifier
+ -- d.o Conservative elaboration order for indirect calls
+ -- d.p
-- d.q
-- d.r Enable OK_To_Reorder_Components in non-variant records
- -- d.s Disable expansion of slice move, use memmove
+ -- d.s
-- d.t Disable static allocation of library level dispatch tables
-- d.u Enable Modify_Tree_For_C (update tree for c)
-- d.v Enable OK_To_Reorder_Components in variant records
-- d.z Restore previous support for frontend handling of Inline_Always
-- d.A Read/write Aspect_Specifications hash table to tree
- -- d.B
+ -- d.B Generate a bug box on abort_statement
-- d.C Generate concatenation call, do not generate inline code
-- d.D Disable errors on use of overriding keyword in Ada 95 mode
-- d.E Turn selected errors into warnings
-- d.F Debug mode for GNATprove
-- d.G Ignore calls through generic formal parameters for elaboration
- -- d.H
+ -- d.H GNSA mode for ASIS
-- d.I Do not ignore enum representation clauses in CodePeer mode
- -- d.J Disable parallel SCIL generation mode
- -- d.K
+ -- d.J
+ -- d.K Enable generation of contract-only procedures in CodePeer mode
-- d.L Depend on back end for limited types in if and case expressions
-- d.M Relaxed RM semantics
-- d.N Add node to all entities
-- d.S Force Optimize_Alignment (Space)
-- d.T Force Optimize_Alignment (Time)
-- d.U Ignore indirect calls for static elaboration
- -- d.V
+ -- d.V Do not verify validity of SCIL files (CodePeer mode)
-- d.W Print out debugging information for Walk_Library_Items
-- d.X Old treatment of indexing aspects
-- d.Y
-- d.1 Enable unnesting of nested procedures
-- d.2 Allow statements in declarative part
- -- d.3
- -- d.4
- -- d.5
+ -- d.3 Output debugging information from Exp_Unst
+ -- d.4 Do not delete generated C file in case of errors
+ -- d.5 Do not generate imported subprogram definitions in C code
-- d.6
-- d.7
-- d.8
-- dl
-- dm
-- dn List details of manipulation of Num_Pred values
- -- do Use old preference for elaboration order
- -- dp
+ -- do Use older preference for elaboration order
+ -- dp Use old preference for elaboration order
-- dq
-- dr
-- ds
-- dt
-- du List units as they are acquired
- -- dv
+ -- dv Verbose debugging printouts
-- dw
-- dx Force binder to read xref information from ali files
-- dy
-- dt Print full tree. The generated tree is output (see also df,dy)
-- du Uncheck categorization pragmas. This debug switch causes the
- -- categorization pragmas (Pure, Preelaborate etc) to be ignored
- -- so that normal checks are not made (this is particularly useful
- -- for adding temporary debugging code to units that have pragmas
- -- that are inconsistent with the debugging code added.
+ -- elaboration control pragmas (Pure, Preelaborate, etc.) and the
+ -- categorization pragmas (Shared_Passive, Remote_Types, etc.) to be
+ -- ignored, so that normal checks are not made (this is particularly
+ -- useful for adding temporary debugging code to units that have
+ -- pragmas that are inconsistent with the debugging code added).
-- dv Output trace of overload resolution. Outputs messages for
-- overload attempts that involve cascaded errors, or where
- -- an interepretation is incompatible with the context.
+ -- an interpretation is incompatible with the context.
-- dw Write semantic scope stack messages. Each time a scope is created
-- or removed, a message is output (see the Sem_Ch8.Push_Scope and
-- general Elaborate_All is still required because of nested calls.
-- dE Apply compile time elaboration checking for with relations between
- -- predefined units. Normally no checks are made (it seems that at
- -- least on the SGI, such checks run into trouble).
+ -- predefined units. Normally no checks are made.
-- dF Front end data layout enabled. Normally front end data layout
-- is only enabled if the target parameter Backend_Layout is False.
-- is used in the fixed bugs run to minimize system and version
-- dependency in filed -gnatD or -gnatG output.
- -- dJ Generate debugging trace output for the JGNAT back end. This
- -- consists of symbolic Java Byte Code sequences for all generated
- -- classes plus additional information to indicate local variables
- -- and methods.
-
-- dK Kill all error messages. This debug flag suppresses the output
-- of all error messages. It is used in regression tests where the
-- error messages are target dependent and irrelevant.
-- dL Output trace information on elaboration checking. This debug
-- switch causes output to be generated showing each call or
-- instantiation as it is checked, and the progress of the recursive
- -- trace through calls at elaboration time.
+ -- trace through elaboration calls at compile time.
-- dM Assume all variables have been modified, and ignore current value
-- indications. This debug flag disconnects the tracking of constant
-- in preelaborable packages, but this restriction is a huge pain,
-- especially in the predefined library units.
+ -- dQ Use old method for determining what goes on the secondary stack.
+ -- This disables some newer optimizations. The intent is to use this
+ -- temporarily to measure before/after efficiency. ???Remove this
+ -- when we are done (see Sem_Util.Requires_Transient_Scope).
+
-- dR Bypass the check for a proper version of s-rpc being present
-- to use the -gnatz? switch. This allows debugging of the use
-- of stubs generation without needing to have GLADE (or some
-- be used in particular to disable Warnings (Off) to check if any of
-- these statements are inappropriate.
+ -- d.k If an error message contains a reference to a location in an
+ -- internal unit, then suppress the line number in this reference.
+
-- d.j Generate listing of frontend inlined calls and inline calls passed
-- to the backend. This is useful to locate skipped calls that must be
-- inlined by the frontend.
-- compiler has a bug -- these are the files that need to be included
-- in a bug report.
- -- d.o Generate listing showing the IL instructions generated by the .NET
- -- compiler for each subprogram.
-
- -- d.p Enable the .NET CIL verifier. During development the verifier is
- -- disabled by default and this flag is used to enable it. In the
- -- future we will reverse this functionality.
+ -- d.o Conservative elaboration order for indirect calls. This causes
+ -- P'Access to be treated as a call in more cases.
-- d.r Forces the flag OK_To_Reorder_Components to be set in all record
-- base types that have no discriminants.
- -- d.s Normally the compiler expands slice moves into loops if overlap
- -- might be possible. This debug flag inhibits that expansion, and
- -- the back end is expected to use an appropriate routine to handle
- -- overlap, based on Forward_OK and Backwards_OK flags.
-
-- d.t The compiler has been modified (a fairly extensive modification)
-- to generate static dispatch tables for library level tagged types.
-- This debug switch disables this modification and reverts to the
-- code generation step.
-- d.z Restore previous front-end support for Inline_Always. In default
- -- mode, for targets that use the GCC back end (i.e. currently all
- -- targets except AAMP, .NET, JVM, and GNATprove), Inline_Always is
+ -- mode, for targets that use the GCC back end, Inline_Always is
-- handled by the back end. Use of this switch restores the previous
-- handling of Inline_Always by the front end on such targets. For the
-- targets that do not use the GCC back end, this switch is ignored.
-- for now, this is controlled by the debug flag d.A. The hash table
-- is only written and read if this flag is set.
+ -- d.B Generate a bug box when we see an abort_statement, even though
+ -- there is no bug. Useful for testing Comperr.Compiler_Abort: write
+ -- some code containing an abort_statement, and compile it with
+ -- -gnatd.B. There is nothing special about abort_statements; it just
+ -- provides a way to control where the bug box is generated. See "when
+ -- N_Abort_Statement" in package body Expander.
+
-- d.C Generate call to System.Concat_n.Str_Concat_n routines in cases
-- where we would normally generate inline concatenation code.
-- now fixed, but we provide this debug flag to revert to the previous
-- situation of ignoring such calls to aid in transition.
+ -- d.H Sets ASIS_GNSA_Mode to True. This signals the front end to suppress
+ -- the call to gigi in ASIS_Mode.
+
-- d.I Do not ignore enum representation clauses in CodePeer mode.
-- The default of ignoring representation clauses for enumeration
-- types in CodePeer is good for the majority of Ada code, but in some
-- cases being able to change this default might be useful to remove
-- some false positives.
- -- d.J Disable parallel SCIL generation. Normally SCIL file generation is
- -- done in parallel to speed processing. This switch disables this
- -- behavior.
+ -- d.K Enable generation of contract-only procedures in CodePeer mode and
+ -- report a warning on subprograms for which the contract-only body
+ -- cannot be built. Currently reported on subprograms defined in
+ -- nested package specs that have some formal (or return type) whose
+ -- type is a private type defined in some enclosing package and that
+ -- have pre/postconditions.
-- d.L Normally the front end generates special expansion for conditional
-- expressions of a limited type. This debug flag removes this special
-- reverts to the behavior of earlier compilers, which ignored
-- indirect calls.
+ -- d.V Do not verify the validity of SCIL files (CodePeer mode). When
+ -- generating SCIL files for CodePeer, by default we verify that the
+ -- SCIL is well formed before saving it on disk. This switch can be
+ -- used to disable this checking, either to improve speed or to shut
+ -- down a false positive detected during the verification.
+
-- d.W Print out debugging information for Walk_Library_Items, including
-- the order in which units are walked. This is primarily for use in
-- debugging CodePeer mode.
- -- d.X A previous version of GNAT allowed indexing aspects to be
- -- redefined on derived container types, while the default iterator
- -- was inherited from the aprent type. This non-standard extension
- -- is preserved temporarily for use by the modelling project under
- -- debug flag d.X.
+ -- d.X A previous version of GNAT allowed indexing aspects to be redefined
+ -- on derived container types, while the default iterator was
+ -- inherited from the parent type. This nonstandard extension is
+ -- preserved temporarily for use by the modeling project under debug
+ -- flag d.X.
-- d.Z Normally we always enable expansion in configurable run-time mode
-- to make sure we get error messages about unsupported features even
-- allowed, but in some debugging contexts (e.g. testing the circuit
-- for unnesting of procedures), it is useful to allow this.
+ -- d.3 Output debugging information from Exp_Unst, including the name of
+ -- any unreachable subprograms that get deleted.
+
+ -- d.4 By default in case of an error during C generation, the .c or .h
+ -- file is deleted. This flag keeps the C file.
+
+ -- d.5 By default a subprogram imported generates a subprogram profile.
+ -- This debug flag disables this generation when generating C code,
+ -- assuming a proper #include will be used instead.
+
------------------------------------------
-- Documentation for Binder Debug Flags --
------------------------------------------
-- the algorithm used to determine a correct order of elaboration. This
-- is useful in diagnosing any problems in its behavior.
- -- do Use old elaboration order preference. The new preference rules
+ -- do Use older elaboration order preference. The new preference rules
-- prefer specs with no bodies to specs with bodies, and between two
-- specs with bodies, prefers the one whose body is closer to being
-- able to be elaborated. This is a clear improvement, but we provide
- -- this debug flag in case of regressions.
+ -- this debug flag in case of regressions. Note: -do is even older than
+ -- -dp.
+
+ -- dp Use old elaboration order preference. The new preference rules
+ -- elaborate all units within a strongly connected component together,
+ -- with no other units in between. In particular, if a spec/body pair
+ -- can be elaborated together, it will be. In the new order, the binder
+ -- behaves as if every pragma Elaborate_All that would be legal is
+ -- present, even if it does not appear in the source code.
-- du List unit name and file name for each unit as it is read in
+ -- dv Verbose debugging printouts
+
-- dx Force the binder to read (and then ignore) the xref information
-- in ali files (used to check that read circuit is working OK).
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