1. 20 Nov, 2004 9 commits
  2. 19 Nov, 2004 31 commits
    • tree-ssa-threadupdate.c: Replace REDIRECTION_DATA varray with a hash table. · 1983ac12
              * tree-ssa-threadupdate.c: Replace REDIRECTION_DATA varray with
              a hash table.  Extensive modifications throughout to support
              that change.
              (struct el): New.
              (struct local_info): New.
              (struct redirection_data): Add new INCOMING_EDGES and DO_NOT_DUPLICATE
              fields.
              (redirection_data): Now a hashtable.
              (redirection_data_hash, redirection_data_eq): New.
              (lookup_redirection_data, create_duplicates): New.
              (create_edge_and_update_destionation_phis): New.
              (fixup_template_block, redirect_edges): New.
              (thread_block): Use hash table traversals instead of loops over
              varray entries or incoming edge vectors.
      
      From-SVN: r90941
      Jeff Law committed
    • tree-cfg.c (reinstall_phi_args): New. · 4f7db7f7
      	* tree-cfg.c (reinstall_phi_args): New.
      	(tree_split_edge): Use it after redirecting an edge.  Don't
      	modify PHI_ARG_EDGE.
      
      From-SVN: r90940
      Kazu Hirata committed
    • tree-vectorizer.c (slpeel_verify_cfg_after_peeling): Define only if checking is enabled. · 1d8a9009
      2004-11-19  Andreas Tobler  <a.tobler@schweiz.ch>
      
      	* tree-vectorizer.c (slpeel_verify_cfg_after_peeling): Define only
      	if checking is enabled.
      
      From-SVN: r90939
      Andreas Tobler committed
    • 1.cc: In the checks use... · c55f9f78
      2004-11-19  Paolo Carlini  <pcarlini@suse.de>
      
      	* testsuite/22_locale/time_get/get_date/char/1.cc: In the checks
      	use, more correctly (and consistently with other testcases) the
      	return value of the facet (the iterator arguments are by value).
      	* testsuite/22_locale/time_get/get_date/char/12791.cc: Likewise.
      	* testsuite/22_locale/time_get/get_date/wchar_t/1.cc: Likewise.
      	* testsuite/22_locale/time_get/get_date/wchar_t/12791.cc: Likewise.
      	* testsuite/22_locale/time_get/get_monthname/char/1.cc: Likewise.
      	* testsuite/22_locale/time_get/get_monthname/wchar_t/1.cc: Likewise.
      	* testsuite/22_locale/time_get/get_time/char/1.cc: Likewise.
      	* testsuite/22_locale/time_get/get_time/wchar_t/1.cc: Likewise.
      	* testsuite/22_locale/time_get/get_weekday/char/1.cc: Likewise.
      	* testsuite/22_locale/time_get/get_weekday/wchar_t/1.cc: Likewise.
      	* testsuite/22_locale/time_get/get_year/char/1.cc: Likewise.
      	* testsuite/22_locale/time_get/get_year/wchar_t/1.cc: Likewise.
      
      From-SVN: r90938
      Paolo Carlini committed
    • target-supports.exp (check_visibility_available): Really test the compiler. · 79c70e5a
      2004-11-19  Mark Mitchell  <mark@codesourcery.com>
                  Joseph Myers  <joseph@codesourcery.com>
      
      	* lib/target-supports.exp (check_visibility_available): Really
      	test the compiler.
      
      Co-Authored-By: Joseph Myers <joseph@codesourcery.com>
      
      From-SVN: r90937
      Mark Mitchell committed
    • c-decl.c (push_scope): Remove "\n" from end of diagnostic for too many nested scopes. · 72c4e4db
      	* c-decl.c (push_scope): Remove "\n" from end of diagnostic for
      	too many nested scopes.
      
      From-SVN: r90936
      Joseph Myers committed
    • re PR tree-optimization/18181 (vectorizer: problem in the peeling mechanism in… · 63dfe6ff
      re PR tree-optimization/18181 (vectorizer: problem in the peeling mechanism in the presence of loop invariants that are used after the loop)
      
              PR tree-opt/18181
              * tree-vectorizer.c (slpeel_tree_peel_loop_to_edge): Peeling scheme
              changed to suppoer uses-after-loop and to void creating flow paths
              that shouldn't exist.
              (slpeel_update_phi_nodes_for_guard): Takes additional two arguments.
              Modified to fit the new peeling scheme. Avoid quadratic behavior.
              (slpeel_add_loop_guard): Takes additional argument.
              (slpeel_verify_cfg_after_peeling): New function.
              (vect_update_ivs_after_vectorizer): Takes additional argument. Updated
              documentation. Use 'exit-bb' instead of creating 'new-bb'.
              (rename_variables_in_bb): Don't update phis for BBs out of loop, to fit
              the new peeling scheme.
              (copy_phi_nodes): Function removed. Its functionality moved to
              update_phis_for_duplicate_loop.
              (slpeel_update_phis_for_duplicate_loop): Functionality of copy_phi_nodes
              moved here. Added documentation. Modified to fit the new peeling scheme.
              (slpeel_make_loop_iterate_ntimes): Setting loop->single_exit not not
              needed - done in slpeel_tree_peel_loop_to_edge.
              (slpeel_tree_duplicate_loop_to_edge_cfg): Debug printouts compacted.
              (vect_do_peeling_for_loop_bound): Add documentation. Call
              slpeel_verify_cfg_after_peeling. Call vect_update_ivs_after_vectorizer
              with additional argument.
              (vect_do_peeling_for_alignment): Call slpeel_verify_cfg_after_peeling.
      
              (vect_finish_stmt_generation): Avoid 80 column oveflow.
      
      From-SVN: r90932
      Dorit Naishlos committed
    • tree-vectorizer.c (slpeel_make_loop_iterate_ntimes): Last two arguments removed. · 335d3d54
              * tree-vectorizer.c (slpeel_make_loop_iterate_ntimes): Last two
              arguments removed.
              (slpeel_tree_peel_loop_to_edge): Call slpeel_make_loop_iterate_ntimes
              without last two arguments. Update single_exit of loops.
              (vect_update_niters_after_peeling): Removed. Its functionality was
              moved to vect_do_peeling_for_alignment.
              (vect_do_peeling_for_loop_bound): New name for function previously
              called vect_transform_for_unknown_loop_bound.
              (vect_transform_loop_bound): Call slpeel_make_loop_iterate_ntimes
              instead of code that duplicates the same functionality.
              (vect_do_peeling_for_alignment): Functionality of
              vect_update_niters_after_peeling moved here.
              (vect_transform_loop): Unify call to vect_do_peeling_for_loop_bound -
              previously named vect_transform_for_unknown_loop_bound - for both known
              and unknown loop bound cases.
      
      From-SVN: r90931
      Dorit Naishlos committed
    • tree-vectorizer.c (slpeel_can_duplicate_loop_p): New name for function… · d6901754
      tree-vectorizer.c (slpeel_can_duplicate_loop_p): New name for function previously called verify_loop_for_duplication.
      
              * tree-vectorizer.c (slpeel_can_duplicate_loop_p): New name for function
              previously called verify_loop_for_duplication. All conditions compacted
              into one compound condition. Removed debug dumps.
              (vect_analyze_loop_with_symbolic_num_of_iters): Removed. Some of the
              functionality moved to vect_can_advance_ivs_p, and some to
              vect_analyze_loop_form.
              (vect_can_advance_ivs_p): New function. Contains functionality that was
              taken out of vect_analyze_loop_with_symbolic_num_of_iters.
              (slpeel_tree_peel_loop_to_edge): Call slpeel_can_duplicate_loop_p.
              (vect_analyze_operations): Call vect_can_advance_ivs_p and
              slpeel_can_duplicate_loop_p.
              (vect_get_loop_niters): Added documentation.
              (vect_analyze_loop_form): Check the loop entry always - not only in case
              of unknown loop bound. Create preheader and exit bb if necessary. Apply
              a check that used to take place in
              vect_analyze_loop_with_symbolic_num_of_iters.
              (vectorize_loops): Call verify_loop_closed_ssa under ENABLE_CHECKING.
              Remove redundant call to rewrite_into_loop_closed_ssa.
              (vect_compute_data_refs_alignment): Removed obsolete comment.
      
      From-SVN: r90930
      Dorit Naishlos committed
    • tree-vectorizer.c (slpeel_tree_peel_loop_to_edge): New name for function… · f88a8cfa
      tree-vectorizer.c (slpeel_tree_peel_loop_to_edge): New name for function previously called tree_duplicate_loop_to_edge.
      
              * tree-vectorizer.c (slpeel_tree_peel_loop_to_edge): New name for
              function previously called tree_duplicate_loop_to_edge.
              (slpeel_tree_duplicate_loop_to_edge_cfg): New name for function
              previously called tree_duplicate_loop_to_edge_cfg.
              (slpeel_update_phis_for_duplicate_loop): Prefix 'slpeel' added to
              function name.
              (slpeel_update_phi_nodes_for_guard): Likewise.
              (slpeel_make_loop_iterate_ntimes): Likewise.
              (slpeel_add_loop_guard): Likewise.
              (allocate_new_names, free_new_names): Function declaration moved to top
              of file.
              (rename_use_op, rename_def_op): Likewise.
              (rename_variables_in_bb, rename_variables_in_loop): Likewise.
              (vect_generate_tmps_on_preheader): Function declaration moved.
              (vect_transform_for_unknown_loop_bound): Added missing function
              declaration.
      
      From-SVN: r90929
      Dorit Naishlos committed
    • re PR tree-optimization/18507 (block_defs_stack varrray should not be GC'ed) · 3a2e4b46
      2004-11-19  Andrew Pinski  <pinskia@physics.uc.edu>
      
              PR tree-opt/18507
              * tree-flow.h (tree2): Typedef because there is already a VEC(tree).
              Define a VEC(tree2) for head.
              (register_new_def): Change second argument to be a VEC(tree2).
              * tree-ssa-dom.c (block_defs_stack): Change to be a VEC(tree2).
              (tree_ssa_dominator_optimize): Initialize block_defs_stack with
              the VEC(tree2) function.  Also free it before returning.
              (dom_opt_initialize_block): Use VEC_safe_push instead of VARRAY_PUSH_TREE
              for block_defs_stack.
              (restore_currdefs_to_original_value): Use VEC_length instead of
              VARRAY_ACTIVE_SIZE. VEC_pop instead of VARRAY_TOP_TREE/VARRAY_POP.
              (dom_opt_finalize_block): Use VEC_safe_push instead of VARRAY_PUSH_TREE
              for block_defs_stack.
              * tree-into-ssa.c (block_defs_stack): Change to be a VEC(tree2).
              (rewrite_initialize_block): Use VEC_safe_push instead of VARRAY_PUSH_TREE
              for block_defs_stack.
              (ssa_register_new_def): Likewise.
              (ssa_rewrite_initialize_block): Likewise.
              (rewrite_finalize_block): Use VEC_length instead of
              VARRAY_ACTIVE_SIZE. VEC_pop instead of VARRAY_TOP_TREE/VARRAY_POP.
              (ssa_rewrite_finalize_block): Likewise.
              (register_new_def): Change second argument to be a VEC(tree2).
              Use VEC_safe_push instead of VARRAY_PUSH_TREE.
              (rewrite_blocks): Initialize block_defs_stack with
              the VEC(tree2) function.  Also free it before returning.
              (rewrite_ssa_into_ssa): Likewise.
      
      From-SVN: r90926
      Andrew Pinski committed
    • No darwin non-lazy-ptr for address calculatation when not needed. · 0e1ad529
      OKed by Geoff Keating.
      
      From-SVN: r90925
      Fariborz Jahanian committed
    • tree-ssa.c (verify_ssa): Remove redundant checking of PHI arguments. · 075523c6
              * tree-ssa.c (verify_ssa): Remove redundant checking of PHI
              arguments.
      
      From-SVN: r90924
      Jeff Law committed
    • Makefile.am (doxygen, [...]): Remove extra '$' from host_alias variable. · e752a25d
      2004-11-19  Jonathan Wakely  <redi@gcc.gnu.org>
      
      	* Makefile.am (doxygen, doxygen-maint, doxygen-man): Remove extra '$'
      	from host_alias variable.
      	* Makefile.in: Regenerate.
      
      From-SVN: r90919
      Jonathan Wakely committed
    • re PR target/17735 (make stops with "initializer for integer value is too… · d31f3604
      re PR target/17735 (make stops with "initializer for integer value is too complicated" while building an avr-cross compiler)
      
      	PR target/17735
      	* varasm.c (default_assemble_integer): Allow pointer-sized values.
      	Expand comment.
      
      From-SVN: r90918
      Paul Brook committed
    • [multiple changes] · f4e5280b
      2004-11-19  Chris Jefferson  <chris@bubblescope.net>
      
      	* include/bits/stl_list.h (list::back, list::back const):
      	Don't decrement temporary.
      
      2004-11-19  Paolo Carlini  <pcarlini@suse.de>
      
      	* include/bits/stl_deque.h (deque::front, deque::front const,
      	deque::back, deque::back const): Slightly tweak for stylistic
      	consistency.
      
      From-SVN: r90917
      Paolo Carlini committed
    • Resync. · 9716416b
      From-SVN: r90916
      Arnaud Charlet committed
    • gnat_ugn.texi: Remove extra paren check from list of checks for redundant constructs Add... · 80298b89
      	* gnat_ugn.texi:
      	Remove extra paren check from list of checks for redundant constructs
      	Add documentation of new -gnatyx style check (check extra parens)
      	Remove paragraph about gnatelim debug options.
      
      	* gnat_rm.texi: Document that Ada.Streams now forbids creating stream
      	objects rather than forbidding dependencies on the package Ada.Streams.
      
      	* sinfo.ads: Add ??? note that we should document pragmas passed to
      	back end.
      
      	* g-expect.ads: Fix a few typos in the comments.
      
      From-SVN: r90915
      Arnaud Charlet committed
    • makegpr.adb (Compile): Put the compiling switches (in package Compiler and on the command line)... · 3fa251d0
      	* makegpr.adb (Compile): Put the compiling switches (in package
      	Compiler and on the command line) immediately after "-c", instead of
      	at the end of the command line invocation of the compiler, when
      	compiling a non-Ada file.
      	(Build_Global_Archive): When there is no need to rebuild the archive,
      	set Global_Archive_Exists, so that the archive is passed to the linker
      	if one is needed.
      
      From-SVN: r90914
      Arnaud Charlet committed
    • s-tposen.adb (Lock_Entry): Remove the code for raising Program_Error for… · f0747897
      s-tposen.adb (Lock_Entry): Remove the code for raising Program_Error for Detect_Blocking which is...
      
      	* s-tposen.adb (Lock_Entry): Remove the code for raising Program_Error
      	for Detect_Blocking which is redundant with the check done within the
      	procedure Protected_Single_Entry_Call.
      	(Lock_Read_Only_Entry): Remove the code for raising Program_Error for
      	Detect_Blocking which is redundant with the check done within the
      	procedure Protected_Single_Entry_Call.
      
      From-SVN: r90913
      Arnaud Charlet committed
    • make.adb (Gnatmake): Invoke gnatlink with -shared-libgcc when gnatbind is invoked with -shared. · 5c2d8276
      	* make.adb (Gnatmake): Invoke gnatlink with -shared-libgcc when
      	gnatbind is invoked with -shared.
      
      From-SVN: r90912
      Arnaud Charlet committed
    • init.c (__gnat_map_signal): map SIGSEGV to Storage_Error for AE653 vthreads. · edbe49d1
      	* init.c (__gnat_map_signal): map SIGSEGV to Storage_Error for AE653
      	vthreads.
      	(init_float): Eliminate initialization of floating point status for
      	AE653. The instructions have no effect for vThreads.
      
      From-SVN: r90911
      Arnaud Charlet committed
    • gnat1drv.adb, [...]: Output the copyright message on a separate line from the version message. · 87b62748
      	* gnat1drv.adb, gnatbind.adb, gnatchop.adb, gnatfind.adb, gnatlink.adb,
      	gnatls.adb, gnatxref.adb, gprep.adb: Output the copyright message on a
      	separate line from the version message.
      
      From-SVN: r90910
      Arnaud Charlet committed
    • exp_pakd.adb (Convert_To_PAT_Type): After replacing the original type of the… · 47190c6b
      exp_pakd.adb (Convert_To_PAT_Type): After replacing the original type of the object with the packed array type...
      
      	* exp_pakd.adb (Convert_To_PAT_Type): After replacing the original
      	type of the object with the packed array type, set the Analyzed flag
      	on the object if it is an entity or simple indexed component, to avoid
      	spurious type errors.
      
      From-SVN: r90909
      Arnaud Charlet committed
    • expect.c: Define __unix__ when __APPLE__ is defined. · d10ad8ff
      	* expect.c: Define __unix__ when __APPLE__ is defined.
      
      	* Makefile.in: Inform the value of the variable GMEM_LIB in the
      	Darwin-specific section.
      
      	* lang-specs.h: Change the placement of the %1 marker.
      
      From-SVN: r90908
      Arnaud Charlet committed
    • exp_dbug.ads: Update documentation to reflect simpler encoding for protected operations. · 32310747
      	* exp_dbug.ads: Update documentation to reflect simpler encoding for
      	protected operations.
      
      	* exp_ch9.adb (Build_Selected_Name): Do not include "PT" suffix in
      	generated name, it complicates decoding in gdb and hinders debugging
      	of protected operations.
      	(Build_Barrier_Function_Specification): Set the Needs_Debug_Info
      	flag for the protected entry barrier function.
      	(Build_Protected_Entry_Specification): Set the Needs_Debug_Info
      	flag for the protected entry function.
      
      From-SVN: r90907
      Arnaud Charlet committed
    • exp_ch4.adb (Expand_N_Selected_Component): If the component is the discriminant… · ffe9aba8
      exp_ch4.adb (Expand_N_Selected_Component): If the component is the discriminant of a constrained subtype...
      
      	* exp_ch4.adb (Expand_N_Selected_Component): If the component is the
      	discriminant of a constrained subtype, analyze the copy of the
      	corresponding constraint, because in some cases it may be only
      	partially analyzed.
      	Removes long-lived ??? comments.
      
      	* exp_ch7.adb (Establish_Transient_Scope): Remove complex code that
      	handled controlled or secondary-stack expressions within the
      	iteration_scheme of a loop.
      
      	* sem_ch5.adb (Analyze_Iteration_Scheme): Build a block to evaluate
      	bounds that may contain functions calls, to prevent memory leaks when
      	the bound contains a call to a function that uses the secondary stack.
      	(Check_Complex_Bounds): Subsidiary of Analyze_Iteration_Scheme, to
      	generate temporaries for loop bounds that might contain function calls
      	that require secondary stack and/or finalization actions.
      
      	* sem_ch4.adb (Analyze_Indexed_Component_Form): If the prefix is a
      	selected component and the selector is overloadable (not just a
      	function) treat as function call, Analyze_Call will disambiguate if
      	necessary.
      	(Analyze_Selected_Component): Do not generate an actual subtype for the
      	selected component if expansion is disabled. The actual subtype is only
      	needed for constraint checks.
      	(Analyze_Allocator): If restriction No_Streams is set, then do
      	not permit objects to be declared of a stream type, or of a
      	composite type containing a stream.
      
      	* restrict.ads: Remove the a-stream entry from Unit_Array, since
      	No_Streams no longer prohibits with'ing this package.
      
      	* sem_ch3.adb (Build_Derived_Record_Type): If the parent type has
      	discriminants, but the parent base has unknown discriminants, there is
      	no discriminant constraint to inherit. Such a discrepancy can arise
      	when the actual for a formal type with unknown discriminants is a
      	similar private type whose full view has discriminants.
      	(Analyze_Object_Declaration): If restriction No_Streams is set, then
      	do not permit objects to be declared of a stream type, or of a
      	composite type containing a stream.
      
      From-SVN: r90906
      Arnaud Charlet committed
    • errout.ads, errout.adb: (First_Sloc): New function · bc202b70
      	* errout.ads, errout.adb: (First_Sloc): New function
      
      	* par-ch5.adb (P_Condition): Check for redundant parens is now a style
      	check (-gnatyx) instead of being included as a redundant construct
      	warning.
      
      	* sem_ch6.adb: Change name Style_Check_Subprogram_Order to
      	Style_Check_Order_Subprograms.
      
      	* style.ads, styleg.ads, styleg.adb, styleg-c.adb, stylesw.ads,
      	stylesw.adb: Add Style_Check_Xtra_Parens
      
      	* usage.adb: Add line for -gnatyx (check extra parens)
      
      	* vms_data.ads: Add entry for STYLE_CHECKS=XTRA_PARENS => -gnatyx
      
      From-SVN: r90905
      Arnaud Charlet committed
    • einfo.ads, einfo.adb: Remove Is_Psected flag, no longer used · 1d571f3b
      	* einfo.ads, einfo.adb: Remove Is_Psected flag, no longer used
      	(Has_Rep_Pragma): New function
      	(Has_Attribute_Definition_Clause): New function
      	(Record_Rep_Pragma): Moved here from sem_ch13.adb
      	(Get_Rep_Pragma): Remove junk kludge for Stream_Convert pragma
      
      	* sem_ch13.ads, sem_ch13.adb (Record_Rep_Pragma): Moved to einfo.adb
      
      	* exp_prag.adb: (Expand_Pragma_Common_Object): New procedure
      	(Expand_Pragma_Psect_Object): New procedure
      	These procedures contain the revised and cleaned up processing for
      	these two pragmas. This processing was formerly in Sem_Prag, but
      	is more appropriately moved here. The cleanup involves making sure
      	that the pragmas are properly attached to the tree, and that no
      	nodes are improperly shared.
      
      	* sem_prag.adb: Move expansion of Common_Object and Psect_Object
      	pragmas to Exp_Prag, which is more appropriate.
      	Attach these two pragmas to the Rep_Item chain Use Rep_Item chain to
      	check for duplicates Remove use of Is_Psected flag, no longer needed.
      	Use new Make_String_Literal function with string.
      
      	* exp_attr.adb (Expand_Fpt_Attribute): The floating-point attributes
      	that are functions return universal values, that have to be converted
      	to the context type.
      	Use new Make_String_Literal function with string.
      	(Get_Stream_Convert_Pragma): New function, replaces the use of
      	Get_Rep_Pragma, which had to be kludged to work in this case.
      
      	* freeze.adb: Use new Has_Rep_Pragma function
      
      	* exp_intr.adb, exp_ch3.adb, sem_attr.adb: Use new Make_String_Literal
      	function with string.
      	Use new Has_Rep_Pragma function.
      
      	* tbuild.ads, tbuild.adb (Make_String_Literal): New function, takes
      	string argument.
      
      From-SVN: r90904
      Arnaud Charlet committed
    • exp_dist.adb (Build_RPC_Receiver_Body): New subprogram. · 1735e55d
      	* exp_dist.adb (Build_RPC_Receiver_Body): New subprogram. This
      	procedures factors the common processing for building an RPC receiver
      	for an RCI package or an RACW type.
      	Stylistic cleanup: change '/= Empty' to 'Present ()'; move body of
      	Build_Remote_Subprogram_Proxy_Type into proper alphabetical order.
      	(Get_PCS_Name): New subprogram. Returns the name of the PCS currently
      	in use.
      	(Specific_Add_RACW_Features): New subprogram. PCS-specific part of
      	Add_RACW_Features.
      	(Specific_Add_RAST_Features): New subprogram. PCS-specific part of
      	Add_RAST_Features.
      	(Assign_Subprogram_Identifier): New subprogram. Provision for assigning
      	distribution subprogram identifiers that are either subprogram numbers
      	or strings.
      	(Get_Subprogram_Ids): New subprogram. Retrieve both the numeric and
      	string distribution identifiers assigned to a given subprogram.
      	(Get_Subprogram_Id): Reimplement in terms of Get_Subprogram_Ids.
      	(Add_RAS_Dereference_TSS): Add comments.
      	(Build_General_Calling_Stubs): Note that the RACW_Type formal parameter
      	is not referenced yet because it will be used by the PolyORB DSA
      	implementation.
      	(Insert_Partition_Check): Remove fossile code.
      	(First_RCI_Subprogram_Id): Document this constant.
      	(Add_RAS_Access_TSS): Correct the setting of the Etype of the
      	RAS_Access TSS.
      	(Get_Pkg_Name_String): Remove subprogram. Usage occurrences are
      	replaced with calls to Get_Library_Unit_Name_String. Previously there
      	were several instances of the same code in different locations in the
      	compiler; this checkin completes the replacement of all of these
      	instances with calls to a common subprogram.
      	Minor reformatting.
      
      	* sem_dist.adb: Remove comment noting that RPC receiver generation
      	should be disabled for RACWs that implement RASs.
      	(Process_Partition_Id): Use new subprogram Get_Library_Unit_Name_String.
      
      	* sem_util.ads, sem_util.adb (Has_Stream): New function
      	(Get_Library_Unit_Name_String): New subprogram to retrieve the fully
      	qualified name of a library unit into the name buffer.
      	(Note_Possible_Modification): Generate a reference only
      	if the context comes from source.
      
      	* snames.ads (PCS_Names): New subtype corresponding to names of
      	supported implementations of the Partition Communication Subsystem
      	(PCS) (i.e. the runtime library support modules for the distributed
      	systems annex).
      
      From-SVN: r90903
      Arnaud Charlet committed