This patch uses the support for pretty-printing escaped URLs added in
the previous patch (PR 87488) so that in a sufficiently capable terminal
the [-Wname-of-option] emitted at the end of each diagnostic becomes a
hyperlink to the documentation for that option on the GCC website.

I've tested it with Fedora 30's GNOME Terminal (3.32.2 with VTE 0.56.3);
the option text is printed with a dotted underline, hovering shows the
URL, and on right-clicking it offers menu items to visit/copy the URL.

gcc/ChangeLog:
	PR 87488
	* Makefile.in (CFLAGS-opts.o): Pass in DOCUMENTATION_ROOT_URL via
	-D.
	* configure.ac (--with-documentation-root-url): New option.
	* configure: Regenerate.
	* diagnostic-format-json.cc (json_end_diagnostic): If there is an
	option URL, add it as a new string field of the diagnostic option.
	* diagnostic.c (diagnostic_initialize): Initialize get_option_url.
	(print_option_information): If get_option_url is non-NULL, call
	it, and if the result is non-NULL, potentially emit an escape
	sequence to markup the option text with the resulting URL.
	* diagnostic.h (diagnostic_context::get_option_url): New callback.
	* doc/invoke.texi (-fdiagnostics-format=): Add "option_url" to
	example of JSON output.
	* opts-diagnostic.h (get_option_url): New decl.
	* opts.c (get_option_url): New function.
	* toplev.c (general_init): Initialize the get_option_url callback.

gcc/testsuite/ChangeLog:
	PR 87488
	* c-c++-common/diagnostic-format-json-2.c: Expect an "option_url"
	field.
	* c-c++-common/diagnostic-format-json-3.c: Likewise.
	* gfortran.dg/diagnostic-format-json-2.F90: Likewise.
	* gfortran.dg/diagnostic-format-json-3.F90: Likewise.
	* jit.dg/test-error-array-bounds.c (create_code): Ensure that
	error messages don't contain escaped URLs.

From-SVN: r276843

z13 supports only non-signaling vector comparisons.  This means we
cannot vectorize LT, LE, GT, GE and LTGT when compiling for z13.  Notify
middle-end about this by using more restrictive operator predicate in
vcond<V_HW:mode><V_HW2:mode>.

gcc/ChangeLog:

2019-10-10  Ilya Leoshkevich  <iii@linux.ibm.com>

	PR target/77918
	* config/s390/vector.md (vcond_comparison_operator): New
	predicate.
	(vcond<V_HW:mode><V_HW2:mode>): Use vcond_comparison_operator.

From-SVN: r276842

https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
describes an emerging standard for embedding URLs in escape sequences
for marking up text output.  This is supported e.g. by recent releases
of GNOME Terminal.

This patch adds support to our pretty-printing framework for emitting
URLs.

A followup patch uses this to add URLs to the pertinent documentation
for the output of -fdiagnostics-show-option.

gcc/ChangeLog:
	PR 87488
	* common.opt (fdiagnostics-urls=): New option.
	(diagnostic-url.h): Add SourceInclude.
	(diagnostic_url_rule): New enum.
	* diagnostic-color.c: Include "diagnostic-url.h".
	(diagnostic_urls_enabled_p): New function.
	* diagnostic-url.h: New file.
	* diagnostic.c: Include "diagnostic-url.h".
	(diagnostic_urls_init): New function.
	* diagnostic.h (diagnostic_urls_init): New decl.
	* doc/invoke.texi (Diagnostic Message Formatting Options): Add
	-fdiagnostics-urls to the list.
	(-fdiagnostics-urls): New option.
	* gcc.c (driver_handle_option): Handle OPT_fdiagnostics_urls_.
	(driver::global_initializations): Call diagnostic_urls_init.
	* opts-global.c (init_options_once): Likewise.
	* opts.c (common_handle_option): Handle OPT_fdiagnostics_urls_.
	* pretty-print.c (pretty_printer::pretty_printer): Initialize
	show_urls.
	(pp_begin_url): New function.
	(pp_end_url): New function.
	(selftest::test_urls): New selftest.
	(selftest::pretty_print_c_tests): Call it.
	* pretty-print.h (pretty_printer::show_urls): New field.
	(pp_begin_url): New decl.
	(pp_end_url): New decl.

gcc/testsuite/ChangeLog:
	PR 87488
	* lib/prune.exp (TEST_ALWAYS_FLAGS): Add -fdiagnostics-urls=never.

From-SVN: r276841

	PR libstdc++/91057
	* src/c++98/locale.cc [_GLIBCXX_LONG_DOUBLE_COMPAT]
	(find_ldbl_sync_facet): Fix parameter type and missing return.

From-SVN: r276840

	PR target/92022
	* config/alpha/alpha.c (alpha_handle_trap_shadows): Skip DEBUG_INSN.

testsuite/ChangeLog:

	PR target/92022
	* g++.dg/pr92022.C: New test.

From-SVN: r276839

2019-10-10  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

	* exp_ch7.adb (Check_Unnesting_In_Decls_Or_Stmts): When
	encountering a loop at the top level of a package declaration
	list (that is, within the declarations of a package spec or
	body) that has nested subprograms, call Unnest_Loop to create a
	new library-level procedure that will contain the loop, to allow
	for proper handling of up-level references from within nested
	subprograms, such as to loop parameters.
	(Unnest_Loop): New procedure that takes a loop statement and
	creates a new procedure body to enclose the loop statement,
	along with generating a call to the procedure.

From-SVN: r276836

2019-10-10  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

	* freeze.adb (Freeze_Subprogram): Ensure constructor is a C++
	constructor.

From-SVN: r276835

2019-10-10  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

	* libgnat/a-ststio.ads (File_Type): Apply pragma
	Preelaborable_Initialization to the type.

From-SVN: r276834

2019-10-10  Yannick Moy  <moy@adacore.com>

gcc/ada/

	* inline.adb (Can_Be_Inlined_In_GNATprove_Mode): Do not peek
	under private types whose completion is SPARK_Mode Off.

From-SVN: r276833

2019-10-10  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

	* exp_ch4.adb, sem_cat.adb, sem_ch12.adb, sem_ch3.adb,
	sem_ch6.adb, sem_prag.adb, sem_util.adb, sem_util.ads: Minor
	typo fixes.

From-SVN: r276832

2019-10-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

	* sem_warn.adb (Warn_On_Useless_Assignment): Do not warn if the
	second assignment is at the same source position as the first.

From-SVN: r276831

2019-10-10  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

	* sem_util.adb (Enclosing_Subprogram): Handle the case of
	E_Entry_Family, returning the entry family's associated
	Protected_Body_Subprogram (as was already done for E_Entry).
	* exp_ch9.adb (Expand_N_Accept_Statement): Call Reset_Scopes_To
	on the block created for an accept statement to reset the scopes
	of any local entities to the block scope.

From-SVN: r276830

2019-10-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

	* sem_ch12.adb (Analyze_Formal_Package_Declaration): Propagate
	an aspect specification for Abstract_State from generic package
	to formal package, so that it is available when analyzing the
	constructed formal.

From-SVN: r276829

2019-10-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_ch6.adb (Set_Actual_Subtypes): Put the freeze node of the
	actual subtype after its declaration when the type of the formal
	has a predicate.

From-SVN: r276828

2019-10-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_ch13.adb (Adjust_Record_For_Reverse_Bit_Order): Do not use
	the Esize of the component to compute its layout, but only the
	Component_Clause.  Do not issue a warning for the _Tag
	component.  Also set the Esize of the component at the end of
	the layout.
	(Analyze_Record_Representation_Clause): Remove Hbit local
	variable.  Lay out the Original_Record_Component only if it's
	distinct from the component.
	(Check_Record_Representation_Clause): Fix off-by-one bug for the
	Last_Bit of the artificial clause built for the _Tag component.

From-SVN: r276827

2019-10-10  Bob Duff  <duff@adacore.com>

gcc/ada/

	* treepr.ads, treepr.adb (ppar): New procedure.

From-SVN: r276826

2019-10-10  Bob Duff  <duff@adacore.com>

gcc/ada/

	* sem_aggr.adb (Resolve_Aggregate): Add missing cases in the
	Others_Allowed => True case -- N_Case_Expression_Alternative and
	N_If_Expression.  Use Nkind_In.
	* atree.adb, atree.ads, sinfo.adb, sinfo.ads (Nkind_In): New
	16-parameter version.

From-SVN: r276824

2019-10-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

	* sem_aggr.adb (Resolve_Array_Aggregate): Set properly the
	Predicated_Parent link of an itype created for an aggregate, so
	that the predicate_function of the parent can support proofs on
	the object that it initializes.

From-SVN: r276823

2019-10-10  Eric Botcazou  <ebotcazou@adacore.com>

gcc/ada/

	* sem_ch3.adb (Analyze_Number_Declaration): Set
	Debug_Info_Needed in the case where the expression is an integer
	literal.

From-SVN: r276822

2019-10-10  Yannick Moy  <moy@adacore.com>

gcc/ada/

	* inline.adb (Can_Be_Inlined_In_GNATprove_Mode): Add subprograms
	with deep parameter or result type as not candidates for
	inlining.

From-SVN: r276821

2019-10-10  Vadim Godunko  <godunko@adacore.com>

gcc/ada/

	* libgnat/g-exptty.ads (TTY_Process_Descriptor): Set default
	value for Process.

From-SVN: r276820

2019-10-10  Bob Duff  <duff@adacore.com>

gcc/ada/

	* sem_prag.adb (Defer_Compile_Time_Warning_Error_To_BE): In
	addition to saving the pragma for further processing, copy the
	pragma into the main unit if necessary.

From-SVN: r276819

2019-10-10  Bob Duff  <duff@adacore.com>

gcc/ada/

	* einfo.ads, einfo.adb (Invariants_Ignored): New flag on types.
	This leaves just one unused flag.
	* sem_prag.adb (Invariant): Set the flag if appropriate.
	* exp_util.adb (Make_Invariant_Call): Check the flag.

From-SVN: r276818

2019-10-10  Arnaud Charlet  <charlet@adacore.com>

gcc/ada/

	* gnat1drv.adb (Gnat1drv): Skip code generation when handling an
	incomplete unit with -gnatceg.

From-SVN: r276817

2019-10-10  Gary Dismukes  <dismukes@adacore.com>

gcc/ada/

	* exp_ch7.adb (Check_Unnesting_Elaboration_Code): Various
	cleanups.
	(Set_Elab_Proc): New procedure to create the defining identifier
	for a procedure created to encapsulate top-level blocks
	occurring as a part of library package elaboration.
	(First_Local_Scope): Function replaced by
	Reset_Scopes_To_Elab_Proc.
	(Reset_Scopes_To_Elab_Proc): New recursive procedure based on
	First_Local_Scope, which it replaces, that is called to traverse
	the statements of a library package body to locate top-level
	blocks and determine whether they contain nested subprograms
	that might address library-level objects of the package. Such
	blocks (and loops) and certain top-level subprograms within the
	statements will have their Scope reset here to match an
	encapsulating procedure created by
	Check_Unnesting_Elaboration_Code that will contain the
	statements.
	(Check_Unnesting_In_Decls_Or_Stmts): Code for handling blocks
	factored out into Unnest_Block. Add handling for package
	declarations and bodies, making recursive calls for
	visible/private declarations, body declarations, statements, and
	exception handlers. Also remove test for Is_Compilation_Unit:
	caller tests for Is_Library_Level_Entity instead.  Also, this
	proc's name was changed from Check_Unnesting_In_Declarations.
	(Check_Unnesting_In_Handlers): New procedure to traverse a
	sequence of exception handlers, calling
	Check_Unnesting_In_Decls_Or_Stmts on the statements of each
	handler.
	(Expand_N_Package_Body): Call Check_Unnesting_* routines only
	when Unnest_Subprogram_Mode is set and the current scope is a
	library-level entity (which includes packages and instantiations
	nested directly within a library unit).
	(Expand_N_Package_Declaration): Call Check_Unnesting_* routines
	only when Unnest_Subprogram_Mode is set and the current scope is
	a library-level entity (which includes packages and
	instantiations nested directly within a library unit).
	(Unnest_Block): New procedure factored out of
	Check_Unnesting_In_Decls_Or_Stmts, for creating a new procedure
	to replace a block statement and resetting the Scope fields of
	the block's top-level entities.

From-SVN: r276816

2019-10-10  Anthony Leonardo Gracio  <leonardo@adacore.com>

gcc/ada/

	* doc/gnat_ugn/about_this_guide.rst,
	doc/gnat_ugn/building_executable_programs_with_gnat.rst,
	doc/gnat_ugn/getting_started_with_gnat.rst,
	doc/gnat_ugn/gnat_and_program_execution.rst, errout.ads,
	exp_ch3.adb, gnatls.adb, impunit.adb, lib-writ.ads, opt.ads,
	sem_ch7.adb, sem_prag.adb, sem_res.adb, sem_warn.adb,
	terminals.c: Replace GPS by GNAT Studio.
	* gnat_ugn.texi: Regenerate.

From-SVN: r276815

2019-10-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

	* exp_ch6.adb (Expand_Simple_Function_Return_Statement): If the
	function to which the return statement applies is an
	Ignored_Ghost_Function, do not indicate that it uses the
	secondary stack when the return type is unconstrained.

From-SVN: r276814

2019-10-10  Bob Duff  <duff@adacore.com>

gcc/ada/

	* libgnat/a-cbdlli.adb, libgnat/a-cbhama.adb,
	libgnat/a-cbhase.adb, libgnat/a-cbmutr.adb,
	libgnat/a-cborma.adb, libgnat/a-cborse.adb,
	libgnat/a-cdlili.adb, libgnat/a-cidlli.adb,
	libgnat/a-cihama.adb, libgnat/a-cihase.adb,
	libgnat/a-cimutr.adb, libgnat/a-ciorma.adb,
	libgnat/a-ciorse.adb, libgnat/a-cobove.adb,
	libgnat/a-cohama.adb, libgnat/a-cohase.adb,
	libgnat/a-coinve.adb, libgnat/a-comutr.adb,
	libgnat/a-conhel.adb, libgnat/a-convec.adb,
	libgnat/a-coorma.adb, libgnat/a-coorse.adb (Reference,
	Constant_Reference): Use Busy instead of Lock, so we forbid
	tampering with cursors, rather than tampering with elements.

From-SVN: r276813

2019-10-10  Ed Schonberg  <schonberg@adacore.com>

gcc/ada/

	* sem_cat.adb (Set_Categorization_From_Pragma): Do not modify
	any visibility settings if there are no compilation_unit pragmas
	following the package declaration. Add comments for future
	cleanup.

From-SVN: r276812

2019-10-10  Patrick Bernardi  <bernardi@adacore.com>

gcc/ada/

	* bindgen.adb (System_Secondary_Stack_Package_In_Closure):
	Renamed flag System_Secondary_Stack_Used to be clearer of what
	it represents.
	(Gen_Adainit): Refactor secondary stack related code to make it
	clearer.
	* rtsfind.adb (Load_RTU): Don't set Sec_Stack_Used flag here
	(RTE): Set Sec_Stack_Used if the System.Secondary_Stack is
	referenced, but not if we're ignoring ghost code.

From-SVN: r276811

2019-10-10  Piotr Trojanek  <trojanek@adacore.com>

gcc/ada/

	* sem_prag.adb (Analyze_Global_In_Decl_Part): Simplify previous
	test, just like in a recent commit we simplified a similar test
	for Depends contract.

From-SVN: r276810

gcc/
	PR target/88630
	* config/sh/sh.h (TARGET_FPU_SH4_300): New macro.
	* config/sh/sh.c (sh_option_override): Enable fsca and fsrra insns
	also for TARGET_FPU_SH4_300.
	(sh_emit_mode_set): Check for TARGET_FPU_SH4_300 instead of
	TARGET_SH4_300.
	* config/sh/sh.md (toggle_pr): Add TARGET_FPU_SH4_300 condition.
	(negsf2): Expand to either negsf2_fpscr or negsf2_no_fpscr.
	(*negsf2_i): Split into ...
	(negsf2_fpscr, negsf2_no_fpscr): ... these new patterns.
	(abssf2): Expand to either abssf2_fpsc or abssf2_no_fpsc.
	(**abssf2_i): Split into ...
	(abssf2_fpscr, abssf2_no_fpscr): ... these new patterns.
	(negdf2): Expand to either negdf2_fpscr or negdf2_no_fpscr.
	(*negdf2_i): Split into ...
	(negdf2_fpscr, negdf2_no_fpscr): ... these new patterns.
	(absdf2): Expand to either absdf2_fpscr or absdf2_no_fpsc.
	(**abssf2_i): Split into ...
	(absdf2_fpscr, absdf2_no_fpscr): ... these new patterns.

From-SVN: r276809

comp_ptr_ttypes_real could use bool instead of int since it only returns
0 or 1.

	* typeck.c (comp_ptr_ttypes_real): Change the return type to bool.
	Use false instead of 0.

From-SVN: r276808

re PR middle-end/92046 (Command line options (that are per-functions) are affecting --params which are global.)

2019-10-10  Richard Biener  <rguenther@suse.de>

	PR middle-end/92046
	* opts.c (finish_options): Do not influence global --params
	from options that are adjustable per function.
	* tree-vect-data-refs.c (vect_enhance_data_refs_alignment):
	Apply --param adjustment based on active cost-model.
	* tree-ssa-phiopt.c (cond_if_else_store_replacement): Disable
	further store-sinking when vectorization or if-conversion
	are not enabled.

From-SVN: r276807

	PR middle-end/92037
	* cgraph.c (symbol_table_test::symbol_table_test): Use ggc_alloc
	rather than ggc_alloc_cleared to alloc symbol table.
	* toplev.c (general_init): Likewise.
	* cgraph.h (symbol_table): Explicitly construct every field.

From-SVN: r276804

2019-10-10  Richard Biener  <rguenther@suse.de>

	* lto-common.c (unify_scc): Do not merge anonymous NAMESPACE_DECLs.

From-SVN: r276796

So far z15 was identified as arch13. After the machine has been
announced we can now add the real name.

gcc/ChangeLog:

2019-10-10  Andreas Krebbel  <krebbel@linux.ibm.com>

	* common/config/s390/s390-common.c (PF_ARCH13): Rename to...
	(PF_Z15): ... this.
	* config.gcc: Add z15 as option for --with-arch and --with-tune
	configure switches.
	* config/s390/s390-c.c (s390_resolve_overloaded_builtin): Add
	error reporting for unsupported builtins.
	* config/s390/s390-opts.h (enum processor_type): Rename
	PROCESSOR_8561_ARCH13 to PROCESSOR_8561_Z15.
	* config/s390/8561.md: Rename arch13 to z15 throughout the file.
	* config/s390/driver-native.c (s390_host_detect_local_cpu):
	Likewise.
	* config/s390/s390-builtins.def: Likewise.
	* config/s390/s390.c (processor_table): Add z15 as option and keep arch13 as alternative.
	(s390_expand_builtin): Add missing check for unsupported builtins.
	(s390_canonicalize_comparison): Rename TARGET_ARCH13 to TARGET_Z15.
	(s390_rtx_costs): Likewise.
	(s390_get_sched_attrmask): Rename arch13 to z15.
	(s390_get_unit_mask): Likewise.
	(s390_is_fpd): Likewise.
	(s390_is_fxd): Likewise.
	* config/s390/s390.h (enum processor_flags): Likewise.
	* config/s390/s390.md: Likewise.
	* config/s390/vector.md: Likewise.
	* config/s390/vx-builtins.md: Likewise.
	* config/s390/s390.opt: Add z15 to processor_type value.

From-SVN: r276792

        * trans-openmp.c (gfc_trans_omp_clauses): Actually pass
        use_device_addr on to the middle end.

From-SVN: r276791

For the call to __morestack we use a special ABI in the S/390 back-end
which requires us to emit a parameter block to the .rodata section.
It contains the label whereto __morestack needs to return.  The
parameter block needs to be explicit in RTL since we also need to take
the address of it loaded into r1 in order to pass its address to
__morestack.  In order to express correctly what __morestack does its
RTX also contained the return label. Hence we had the return label to
occur twice in the insn stream.  This is problematic when it comes to
redirecting edges.  The correlation between these two occurrences of
the label cannot be expressed so when doing a redirect only the label
in the jump RTX gets modified while the parameter block label stays as
is.

The patch avoids having two instancs of the label by merging the
parameter block generation and the __morestack call RTX into one. By
doing this I could also get rid of the unspec which was required for
the parameter block generation so far.

gcc/ChangeLog:

2019-10-10  Andreas Krebbel  <krebbel@linux.ibm.com>

	PR target/91035
	* config/s390/s390-protos.h (s390_output_split_stack_data): Add
	prototype.
	* config/s390/s390.md (UNSPECV_SPLIT_STACK_DATA): Remove.
	("split_stack_data", "split_stack_call")
	("split_stack_call_<mode>", "split_stack_cond_call")
	("split_stack_cond_call_<mode>"): Remove.
	("@split_stack_call<mode>", "@split_stack_cond_call<mode>"): New
	insn definition.
	* config/s390/s390.c (s390_output_split_stack_data): New function.
	(s390_expand_split_stack_prologue): Use the merged expander.

From-SVN: r276790

c-family/
	* c-common.h (c_omp_check_context_selector,
	c_omp_get_context_selector): Declare.
	* c-omp.c (c_omp_declare_simd_clauses_to_numbers): Fix spelling
	in diagnostic message.
	(c_omp_check_context_selector, c_omp_get_context_selector): New
	functions.
	* c-attribs.c (c_common_attribute_table): Add "omp declare variant"
	attribute.
	(handle_omp_declare_variant_attribute): New function.
c/
	* c-parser.c (c_parser_omp_all_clauses): Add NESTED_P argument, if
	true, terminate processing on closing paren and don't skip to end of
	pragma line.
	(c_parser_omp_declare_simd): Handle also declare variant.
	(omp_construct_selectors, omp_device_selectors,
	omp_implementation_selectors, omp_user_selectors): New variables.
	(c_parser_omp_context_selector,
	c_parser_omp_context_selector_specification,
	c_finish_omp_declare_variant): New functions.
	(c_finish_omp_declare_simd): Handle both declare simd and
	declare variant.
	(c_parser_omp_declare): Handle declare variant.
cp/
	* parser.h (struct cp_omp_declare_simd_data): Add variant_p member.
	* parser.c (cp_ensure_no_omp_declare_simd): Handle both declare simd
	and declare variant.
	(cp_parser_oacc_all_clauses): Formatting fix.
	(cp_parser_omp_all_clauses): Add NESTED_P argument, if true, terminate
	processing on closing paren and don't skip to end of pragma line.
	(cp_parser_omp_declare_simd): Add VARIANT_P argument.  Handle also
	declare variant.
	(omp_construct_selectors, omp_device_selectors,
	omp_implementation_selectors, omp_user_selectors): New variables.
	(cp_parser_omp_context_selector,
	cp_parser_omp_context_selector_specification,
	cp_finish_omp_declare_variant): New functions.
	(cp_parser_late_parsing_omp_declare_simd): Handle also declare variant.
	(cp_parser_omp_declare): Handle declare variant.
testsuite/
	* c-c++-common/gomp/declare-variant-1.c: New test.
	* c-c++-common/gomp/declare-variant-2.c: New test.
	* c-c++-common/gomp/declare-variant-3.c: New test.
	* g++.dg/gomp/this-1.C: Adjust for diagnostic message spelling fix.
	* gcc.dg/gomp/declare-variant-1.c: New test.
	* gcc.dg/gomp/declare-variant-2.c: New test.

From-SVN: r276789