The following patch partially implements the N3353 paper.
In particular, it adds support for the delimited escape sequences
(\u{123}, \x{123}, \o{123}) which were added already for C++23,
all I had to do is split the delimited escape sequence guarding from
named universal character escape sequence guards
(\N{LATIN CAPITAL LETTER C WITH CARON}), which C++23 has but C2Y doesn't
and emit different diagnostics for C from C++ for the delimited escape
sequences.
And it adds support for the new style of octal literals, 0o137 or 0O1777.
I have so far added that just for C and not C++, because I have no idea
whether C++ will want to handle it similarly.

What the patch doesn't do is any kind of diagnostics for obsoletion of
\137 or 0137, as discussed in the PR, I think it is way too early for that.
Perhaps some non-default warning later on.

2024-10-17  Jakub Jelinek  <jakub@redhat.com>

	PR c/117028
libcpp/
	* include/cpplib.h (struct cpp_options): Add named_uc_escape_seqs,
	octal_constants and cpp_warn_c23_c2y_compat members.
	(enum cpp_warning_reason): Add CPP_W_C23_C2Y_COMPAT enumerator.
	* init.cc (struct lang_flags): Add named_uc_escape_seqs and
	octal_constants bit-fields.
	(lang_defaults): Add initializers for them into the table.
	(cpp_set_lang): Initialize named_uc_escape_seqs and octal_constants.
	(cpp_create_reader): Initialize cpp_warn_c23_c2y_compat to -1.
	* charset.cc (_cpp_valid_ucn): Test
	CPP_OPTION (pfile, named_uc_escape_seqs) rather than
	CPP_OPTION (pfile, delimited_escape_seqs) in \N{} related tests.
	Change wording of C cpp_pedwarning for \u{} and emit
	-Wc23-c2y-compat warning for it too if needed.  Formatting fixes.
	(convert_hex): Change wording of C cpp_pedwarning for \u{} and emit
	-Wc23-c2y-compat warning for it too if needed.
	(convert_oct): Likewise.
	* expr.cc (cpp_classify_number): Handle C2Y 0o or 0O prefixed
	octal constants.
	(cpp_interpret_integer): Likewise.
gcc/c-family/
	* c.opt (Wc23-c2y-compat): Add CPP and CppReason parameters.
	* c-opts.cc (set_std_c2y): Use CLK_STDC2Y or CLK_GNUC2Y rather
	than CLK_STDC23 and CLK_GNUC23.  Formatting fix.
	* c-lex.cc (interpret_integer): Handle C2Y 0o or 0O prefixed
	and wb/WB/uwb/UWB suffixed octal constants.
gcc/testsuite/
	* gcc.dg/bitint-112.c: New test.
	* gcc.dg/c23-digit-separators-1.c: Add _Static_assert for
	valid binary constant with digit separator.
	* gcc.dg/c23-octal-constants-1.c: New test.
	* gcc.dg/c23-octal-constants-2.c: New test.
	* gcc.dg/c2y-digit-separators-1.c: New test.
	* gcc.dg/c2y-digit-separators-2.c: New test.
	* gcc.dg/c2y-octal-constants-1.c: New test.
	* gcc.dg/c2y-octal-constants-2.c: New test.
	* gcc.dg/c2y-octal-constants-3.c: New test.
	* gcc.dg/cpp/c23-delimited-escape-seq-1.c: New test.
	* gcc.dg/cpp/c23-delimited-escape-seq-2.c: New test.
	* gcc.dg/cpp/c2y-delimited-escape-seq-1.c: New test.
	* gcc.dg/cpp/c2y-delimited-escape-seq-2.c: New test.
	* gcc.dg/cpp/c2y-delimited-escape-seq-3.c: New test.
	* gcc.dg/cpp/c2y-delimited-escape-seq-4.c: New test.
	* gcc.dg/octal-constants-1.c: New test.
	* gcc.dg/octal-constants-2.c: New test.
	* gcc.dg/octal-constants-3.c: New test.
	* gcc.dg/octal-constants-4.c: New test.
	* gcc.dg/system-octal-constants-1.c: New test.
	* gcc.dg/system-octal-constants-1.h: New file.

While working on PR117028 C2Y changes, I've noticed weird ternary
operator formatting (operand1 ? operand2: operand3).
The usual formatting is operand1 ? operand2 : operand3
where we have around 18000+ cases of that (counting only what fits
on one line) and
indent -nbad -bap -nbc -bbo -bl -bli2 -bls -ncdb -nce -cp1 -cs -di2 -ndj \
       -nfc1 -nfca -hnl -i2 -ip5 -lp -pcs -psl -nsc -nsob
documented in
https://www.gnu.org/prep/standards/html_node/Formatting.html#Formatting
does the same.
Some code was even trying to save space as much as possible and used
operand1?operand2:operand3 or
operand1 ? operand2:operand3

Today I've grepped for such cases (the grep was '?.*[^ ]:' and I had to
skim through various false positives with that where the : matched e.g.
stuff inside of strings, or *.md pattern macros or :: scope) and the
following patch is a fix for what I found.

2024-10-16  Jakub Jelinek  <jakub@redhat.com>

gcc/
	* attribs.cc (lookup_scoped_attribute_spec): ?: operator formatting
	fixes.
	* basic-block.h (FOR_BB_INSNS_SAFE): Likewise.
	* cfgcleanup.cc (outgoing_edges_match): Likewise.
	* cgraph.cc (cgraph_node::dump): Likewise.
	* config/arc/arc.cc (gen_acc1, gen_acc2): Likewise.
	* config/arc/arc.h (CLASS_MAX_NREGS, CONSTANT_ADDRESS_P): Likewise.
	* config/arm/arm.cc (arm_print_operand): Likewise.
	* config/cris/cris.md (*b<rnzcond:code><mode>): Likewise.
	* config/darwin.cc (darwin_asm_declare_object_name,
	darwin_emit_common): Likewise.
	* config/darwin-driver.cc (darwin_driver_init): Likewise.
	* config/epiphany/epiphany.md (call, sibcall, call_value,
	sibcall_value): Likewise.
	* config/i386/i386.cc (gen_push2): Likewise.
	* config/i386/i386.h (ix86_cur_cost): Likewise.
	* config/i386/openbsdelf.h (FUNCTION_PROFILER): Likewise.
	* config/loongarch/loongarch-c.cc (loongarch_cpu_cpp_builtins):
	Likewise.
	* config/loongarch/loongarch-cpu.cc (fill_native_cpu_config):
	Likewise.
	* config/riscv/riscv.cc (riscv_union_memmodels): Likewise.
	* config/riscv/zc.md (*mva01s<X:mode>, *mvsa01<X:mode>): Likewise.
	* config/rs6000/mmintrin.h (_mm_cmpeq_pi8, _mm_cmpgt_pi8,
	_mm_cmpeq_pi16, _mm_cmpgt_pi16, _mm_cmpeq_pi32, _mm_cmpgt_pi32):
	Likewise.
	* config/v850/predicates.md (pattern_is_ok_for_prologue): Likewise.
	* config/xtensa/constraints.md (d, C, W): Likewise.
	* coverage.cc (coverage_begin_function, build_init_ctor,
	build_gcov_exit_decl): Likewise.
	* df-problems.cc (df_create_unused_note): Likewise.
	* diagnostic.cc (diagnostic_set_caret_max_width): Likewise.
	* diagnostic-path.cc (path_summary::path_summary): Likewise.
	* expr.cc (expand_expr_divmod): Likewise.
	* gcov.cc (format_gcov): Likewise.
	* gcov-dump.cc (dump_gcov_file): Likewise.
	* genmatch.cc (main): Likewise.
	* incpath.cc (remove_duplicates, register_include_chains): Likewise.
	* ipa-devirt.cc (dump_odr_type): Likewise.
	* ipa-icf.cc (sem_item_optimizer::merge_classes): Likewise.
	* ipa-inline.cc (inline_small_functions): Likewise.
	* ipa-polymorphic-call.cc (ipa_polymorphic_call_context::dump):
	Likewise.
	* ipa-sra.cc (create_parameter_descriptors): Likewise.
	* ipa-utils.cc (find_always_executed_bbs): Likewise.
	* predict.cc (predict_loops): Likewise.
	* selftest.cc (read_file): Likewise.
	* sreal.h (SREAL_SIGN, SREAL_ABS): Likewise.
	* tree-dump.cc (dequeue_and_dump): Likewise.
	* tree-ssa-ccp.cc (bit_value_binop): Likewise.
gcc/c-family/
	* c-opts.cc (c_common_init_options, c_common_handle_option,
	c_common_finish, set_std_c89, set_std_c99, set_std_c11,
	set_std_c17, set_std_c23, set_std_cxx98, set_std_cxx11,
	set_std_cxx14, set_std_cxx17, set_std_cxx20, set_std_cxx23,
	set_std_cxx26): ?: operator formatting fixes.
gcc/cp/
	* search.cc (lookup_member): ?: operator formatting fixes.
	* typeck.cc (cp_build_modify_expr): Likewise.
libcpp/
	* expr.cc (interpret_float_suffix): ?: operator formatting fixes.

When working on #embed support, or -Wheader-guard or other recent libcpp
changes, I've been annoyed by the libcpp diagnostics being visually
different from normal gcc diagnostics, especially in the area of quoting
stuff in the diagnostic messages.
Normall GCC diagnostics is gcc_diag/gcc_tdiag, one can use
%</%>, %qs etc. in there, while libcpp diagnostics was marked as printf
and in libcpp we've been very creative with quoting stuff, either
no quotes at all, or "something" quoting, or 'something' quoting, or
`something' quoting (but in none of the cases it used colors consistently
with the rest of the compiler).

Now, libcpp diagnostics is always emitted using a callback,
pfile->cb.diagnostic.  On the gcc/ side, this callback is initialized with
genmatch.cc:  cb->diagnostic = diagnostic_cb;
c-family/c-opts.cc:  cb->diagnostic = c_cpp_diagnostic;
fortran/cpp.cc:  cb->diagnostic = cb_cpp_diagnostic;
where the latter two just use diagnostic_report_diagnostic, so actually
support all the gcc_diag stuff, only the genmatch.cc case didn't.

So, the following patch changes genmatch.cc to use pp_format* instead
of vfprintf so that it supports the gcc_diag formatting (pretty-print.o
unfortunately has various dependencies, so had to link genmatch with
libcommon.a libbacktrace.a and tweak Makefile.in so that there are no
circular dependencies) and marks the libcpp diagnostic routines as
gcc_diag rather than printf.  That change resulted in hundreds of
-Wformat-diag new warnings (most of them useful and resulting IMHO in
better diagnostics), so the rest of the patch is changing the format
strings to make -Wformat-diag happy and adjusting the testsuite for
the differences in how is the diagnostic reformatted.

Dunno if some out of GCC tree projects use libcpp, that case would
make it harder because one couldn't use vfprintf in the diagnostic
callback anymore, but there is always David's libdiagnostic which could
be used for that purpose IMHO.

2024-10-12  Jakub Jelinek  <jakub@redhat.com>

libcpp/
	* include/cpplib.h (ATTRIBUTE_CPP_PPDIAG): Define.
	(struct cpp_callbacks): Use ATTRIBUTE_CPP_PPDIAG instead of
	ATTRIBUTE_FPTR_PRINTF on diagnostic callback.
	(cpp_error, cpp_warning, cpp_pedwarning, cpp_warning_syshdr): Use
	ATTRIBUTE_CPP_PPDIAG (3, 4) instead of ATTRIBUTE_PRINTF_3.
	(cpp_warning_at, cpp_pedwarning_at): Use ATTRIBUTE_CPP_PPDIAG (4, 5)
	instead of ATTRIBUTE_PRINTF_4.
	(cpp_error_with_line, cpp_warning_with_line, cpp_pedwarning_with_line,
	cpp_warning_with_line_syshdr): Use ATTRIBUTE_CPP_PPDIAG (5, 6)
	instead of ATTRIBUTE_PRINTF_5.
	(cpp_error_at): Use ATTRIBUTE_CPP_PPDIAG (4, 5) instead of
	ATTRIBUTE_PRINTF_4.
	* Makefile.in (po/$(PACKAGE).pot): Use --language=GCC-source rather
	than --language=c.
	* errors.cc (cpp_diagnostic_at, cpp_diagnostic,
	cpp_diagnostic_with_line): Use ATTRIBUTE_CPP_PPDIAG instead of
	-ATTRIBUTE_FPTR_PRINTF.
	* charset.cc (cpp_host_to_exec_charset, _cpp_valid_ucn, convert_hex,
	convert_oct, convert_escape): Fix up -Wformat-diag warnings.
	(cpp_interpret_string_ranges, count_source_chars): Use
	ATTRIBUTE_CPP_PPDIAG instead of ATTRIBUTE_FPTR_PRINTF.
	(narrow_str_to_charconst): Fix up -Wformat-diag warnings.
	* directives.cc (check_eol_1, directive_diagnostics, lex_macro_node,
	do_undef, glue_header_name, parse_include, do_include_common,
	do_include_next, _cpp_parse_embed_params, do_embed, read_flag,
	do_line, do_linemarker, register_pragma_1, do_pragma_once,
	do_pragma_push_macro, do_pragma_pop_macro, do_pragma_poison,
	do_pragma_system_header, do_pragma_warning_or_error, _cpp_do__Pragma,
	do_else, do_elif, do_endif, parse_answer, do_assert,
	cpp_define_unused): Likewise.
	* expr.cc (cpp_classify_number, parse_defined, eval_token,
	_cpp_parse_expr, reduce, check_promotion): Likewise.
	* files.cc (_cpp_find_file, finish_base64_embed,
	_cpp_pop_file_buffer): Likewise.
	* init.cc (sanity_checks): Likewise.
	* lex.cc (_cpp_process_line_notes, maybe_warn_bidi_on_char,
	_cpp_warn_invalid_utf8, _cpp_skip_block_comment,
	warn_about_normalization, forms_identifier_p, maybe_va_opt_error,
	identifier_diagnostics_on_lex, cpp_maybe_module_directive): Likewise.
	* macro.cc (class vaopt_state, builtin_has_include_1,
	builtin_has_include, builtin_has_embed, _cpp_warn_if_unused_macro,
	_cpp_builtin_macro_text, builtin_macro, stringify_arg,
	_cpp_arguments_ok, collect_args, enter_macro_context,
	_cpp_save_parameter, parse_params, create_iso_definition,
	_cpp_create_definition, check_trad_stringification): Likewise.
	* pch.cc (cpp_valid_state): Likewise.
	* traditional.cc (_cpp_scan_out_logical_line, recursive_macro):
	Likewise.
gcc/
	* Makefile.in (generated_files): Remove {gimple,generic}-match*.
	(generated_match_files): New variable.  Add a dependency of
	$(filter-out $(OBJS-libcommon),$(ALL_HOST_OBJS)) files on those.
	(build/genmatch$(build_exeext)): Depend on and link against
	libcommon.a and $(LIBBACKTRACE).
	* genmatch.cc: Include pretty-print.h and input.h.
	(ggc_internal_cleared_alloc, ggc_free): Remove.
	(fatal): New function.
	(line_table): Remove.
	(linemap_client_expand_location_to_spelling_point): Remove.
	(diagnostic_cb): Use gcc_diag rather than printf format.  Use
	pp_format_verbatim on a temporary pretty_printer instead of
	vfprintf.
	(fatal_at, warning_at): Use gcc_diag rather than printf format.
	(output_line_directive): Rename location_hash to loc_hash.
	(parser::eat_ident, parser::parse_operation, parser::parse_expr,
	parser::parse_pattern, parser::finish_match_operand): Fix up
	-Wformat-diag warnings.
gcc/c-family/
	* c-lex.cc (c_common_has_attribute,
	c_common_lex_availability_macro): Fix up -Wformat-diag warnings.
gcc/testsuite/
	* c-c++-common/cpp/counter-2.c: Adjust expected diagnostics for
	libcpp diagnostic formatting changes.
	* c-c++-common/cpp/embed-3.c: Likewise.
	* c-c++-common/cpp/embed-4.c: Likewise.
	* c-c++-common/cpp/embed-16.c: Likewise.
	* c-c++-common/cpp/embed-18.c: Likewise.
	* c-c++-common/cpp/eof-2.c: Likewise.
	* c-c++-common/cpp/eof-3.c: Likewise.
	* c-c++-common/cpp/fmax-include-depth.c: Likewise.
	* c-c++-common/cpp/has-builtin.c: Likewise.
	* c-c++-common/cpp/line-2.c: Likewise.
	* c-c++-common/cpp/line-3.c: Likewise.
	* c-c++-common/cpp/macro-arg-count-1.c: Likewise.
	* c-c++-common/cpp/macro-arg-count-2.c: Likewise.
	* c-c++-common/cpp/macro-ranges.c: Likewise.
	* c-c++-common/cpp/named-universal-char-escape-4.c: Likewise.
	* c-c++-common/cpp/named-universal-char-escape-5.c: Likewise.
	* c-c++-common/cpp/pr88974.c: Likewise.
	* c-c++-common/cpp/va-opt-error.c: Likewise.
	* c-c++-common/cpp/va-opt-pedantic.c: Likewise.
	* c-c++-common/cpp/Wheader-guard-2.c: Likewise.
	* c-c++-common/cpp/Wheader-guard-3.c: Likewise.
	* c-c++-common/cpp/Winvalid-utf8-1.c: Likewise.
	* c-c++-common/cpp/Winvalid-utf8-2.c: Likewise.
	* c-c++-common/cpp/Winvalid-utf8-3.c: Likewise.
	* c-c++-common/diagnostic-format-sarif-file-bad-utf8-pr109098-1.c:
	Likewise.
	* c-c++-common/diagnostic-format-sarif-file-bad-utf8-pr109098-3.c:
	Likewise.
	* c-c++-common/pr68833-3.c: Likewise.
	* c-c++-common/raw-string-directive-1.c: Likewise.
	* gcc.dg/analyzer/named-constants-Wunused-macros.c: Likewise.
	* gcc.dg/binary-constants-4.c: Likewise.
	* gcc.dg/builtin-redefine.c: Likewise.
	* gcc.dg/cpp/19951025-1.c: Likewise.
	* gcc.dg/cpp/c11-warning-1.c: Likewise.
	* gcc.dg/cpp/c11-warning-2.c: Likewise.
	* gcc.dg/cpp/c11-warning-3.c: Likewise.
	* gcc.dg/cpp/c23-elifdef-2.c: Likewise.
	* gcc.dg/cpp/c23-warning-2.c: Likewise.
	* gcc.dg/cpp/embed-2.c: Likewise.
	* gcc.dg/cpp/embed-3.c: Likewise.
	* gcc.dg/cpp/embed-4.c: Likewise.
	* gcc.dg/cpp/expr.c: Likewise.
	* gcc.dg/cpp/gnu11-elifdef-2.c: Likewise.
	* gcc.dg/cpp/gnu11-elifdef-3.c: Likewise.
	* gcc.dg/cpp/gnu11-elifdef-4.c: Likewise.
	* gcc.dg/cpp/gnu11-warning-1.c: Likewise.
	* gcc.dg/cpp/gnu11-warning-2.c: Likewise.
	* gcc.dg/cpp/gnu11-warning-3.c: Likewise.
	* gcc.dg/cpp/gnu23-warning-2.c: Likewise.
	* gcc.dg/cpp/include6.c: Likewise.
	* gcc.dg/cpp/pr35322.c: Likewise.
	* gcc.dg/cpp/tr-warn6.c: Likewise.
	* gcc.dg/cpp/undef2.c: Likewise.
	* gcc.dg/cpp/warn-comments.c: Likewise.
	* gcc.dg/cpp/warn-comments-2.c: Likewise.
	* gcc.dg/cpp/warn-comments-3.c: Likewise.
	* gcc.dg/cpp/warn-cxx-compat.c: Likewise.
	* gcc.dg/cpp/warn-cxx-compat-2.c: Likewise.
	* gcc.dg/cpp/warn-deprecated.c: Likewise.
	* gcc.dg/cpp/warn-deprecated-2.c: Likewise.
	* gcc.dg/cpp/warn-long-long.c: Likewise.
	* gcc.dg/cpp/warn-long-long-2.c: Likewise.
	* gcc.dg/cpp/warn-normalized-1.c: Likewise.
	* gcc.dg/cpp/warn-normalized-2.c: Likewise.
	* gcc.dg/cpp/warn-normalized-3.c: Likewise.
	* gcc.dg/cpp/warn-normalized-4-bytes.c: Likewise.
	* gcc.dg/cpp/warn-normalized-4-unicode.c: Likewise.
	* gcc.dg/cpp/warn-redefined.c: Likewise.
	* gcc.dg/cpp/warn-redefined-2.c: Likewise.
	* gcc.dg/cpp/warn-traditional.c: Likewise.
	* gcc.dg/cpp/warn-traditional-2.c: Likewise.
	* gcc.dg/cpp/warn-trigraphs-1.c: Likewise.
	* gcc.dg/cpp/warn-trigraphs-2.c: Likewise.
	* gcc.dg/cpp/warn-trigraphs-3.c: Likewise.
	* gcc.dg/cpp/warn-trigraphs-4.c: Likewise.
	* gcc.dg/cpp/warn-undef.c: Likewise.
	* gcc.dg/cpp/warn-undef-2.c: Likewise.
	* gcc.dg/cpp/warn-unused-macros.c: Likewise.
	* gcc.dg/cpp/warn-unused-macros-2.c: Likewise.
	* gcc.dg/pch/counter-2.c: Likewise.
	* g++.dg/cpp0x/udlit-error1.C: Likewise.
	* g++.dg/cpp23/named-universal-char-escape1.C: Likewise.
	* g++.dg/cpp23/named-universal-char-escape2.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-1.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-2.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-3.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-4.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-5.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-6.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-7.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-8.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-9.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-10.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-11.C: Likewise.
	* g++.dg/cpp23/Winvalid-utf8-12.C: Likewise.
	* g++.dg/cpp/elifdef-3.C: Likewise.
	* g++.dg/cpp/elifdef-5.C: Likewise.
	* g++.dg/cpp/elifdef-6.C: Likewise.
	* g++.dg/cpp/elifdef-7.C: Likewise.
	* g++.dg/cpp/embed-1.C: Likewise.
	* g++.dg/cpp/embed-2.C: Likewise.
	* g++.dg/cpp/pedantic-errors.C: Likewise.
	* g++.dg/cpp/warning-1.C: Likewise.
	* g++.dg/cpp/warning-2.C: Likewise.
	* g++.dg/ext/bitint1.C: Likewise.
	* g++.dg/ext/bitint2.C: Likewise.

Using cpp_pedwarning (CPP_W_PEDANTIC instead of if (CPP_PEDANTIC cpp_error
lets users suppress these diagnostics with
 #pragma GCC diagnostic ignored "-Wpedantic".

This patch changes all instances of the cpp_error (CPP_DL_PEDWARN to
cpp_pedwarning.  In cases where the extension appears in a later C++
revision, we now condition the warning on the relevant -Wc++??-extensions
flag instead of -Wpedantic; in such cases often the if (CPP_PEDANTIC) check
is retained to preserve the default non-warning behavior.

I didn't attempt to adjust the warning flags for the C compiler, since it
seems to follow a different system than C++.

The CPP_PEDANTIC check is also kept in _cpp_lex_direct to avoid an ICE in
the self-tests from cb.diagnostics not being initialized.

While working on testcases for these changes I noticed that the c-c++-common
tests are not run with -pedantic-errors by default like the gcc.dg and
g++.dg directories are.  And if I specify -pedantic-errors with dg-options,
the default -std= changes from c++?? to gnu++??, which interferes with some
other pedwarns.  So two of the tests are C++-only.

libcpp/ChangeLog:

	* include/cpplib.h (enum cpp_warning_reason): Add
	CPP_W_CXX{14,17,20,23}_EXTENSIONS.
	* charset.cc (_cpp_valid_ucn, convert_hex, convert_oct)
	(convert_escape, narrow_str_to_charconst): Use cpp_pedwarning
	instead of cpp_error for pedwarns.
	* directives.cc (directive_diagnostics, _cpp_handle_directive)
	(do_line, do_elif): Likewise.
	* expr.cc (cpp_classify_number, eval_token): Likewise.
	* lex.cc (skip_whitespace, maybe_va_opt_error)
	(_cpp_lex_direct): Likewise.
	* macro.cc (_cpp_arguments_ok): Likewise.
	(replace_args): Use -Wvariadic-macros for pedwarn about
	empty macro arguments.

gcc/c-family/ChangeLog:

	* c.opt: Add CppReason for Wc++{14,17,20,23}-extensions.
	* c-pragma.cc (handle_pragma_diagnostic_impl): Don't check
	OPT_Wc__23_extensions.

gcc/testsuite/ChangeLog:

	* c-c++-common/pragma-diag-17.c: New test.
	* g++.dg/cpp0x/va-opt1.C: New test.
	* g++.dg/cpp23/named-universal-char-escape3.C: New test.

The following patch implements the C23 N3017 "#embed - a scannable,
tooling-friendly binary resource inclusion mechanism" paper.

The implementation is intentionally dumb, in that it doesn't significantly
speed up compilation of larger initializers and doesn't make it possible
to use huge #embeds (like several gigabytes large, that is compile time
and memory still infeasible).
There are 2 reasons for this.  One is that I think like it is implemented
now in the patch is how we should use it for the smaller #embed sizes,
dunno with which boundary, whether 32 bytes or 64 or something like that,
certainly handling the single byte cases which is something that can appear
anywhere in the source where constant integer literal can appear is
desirable and I think for a few bytes it isn't worth it to come up with
something smarter and users would like to e.g. see it in -E readably as
well (perhaps the slow vs. fast boundary should be determined by command
line option).  And the other one is to be able to more easily find
regressions in behavior caused by the optimizations, so we have something
to get back in git to compare against.
I'm definitely willing to work on the optimizations (likely introduce a new
CPP_* token type to refer to a range of libcpp owned memory (start + size)
and similarly some tree which can do the same, and can be at any time e.g.
split into 2 subparts + say INTEGER_CST in between if needed say for
const unsigned char d[] = {
 #embed "2GB.dat" prefix (0, 0, ) suffix (, [0x40000000] = 42)
}; still without having to copy around huge amounts of data; STRING_CST
owns the memory it points to and can be only 2GB in size), but would
like to do that incrementally.
And would like to first include some extensions also not included in
this patch, like gnu::offset (off) parameter to allow to skip certain
constant amount of bytes at the start of the files, plus
gnu::base64 ("base64_encoded_data") parameter to add something which can
store more efficiently large amounts of the #embed data in preprocessed
source.

I've been cross-checking all the tests also against the LLVM implementation
https://github.com/llvm/llvm-project/pull/68620
which has been for a few hours even committed to LLVM trunk but reverted
afterwards.  LLVM now has the support committed and I admit I haven't
rechecked whether the behavior on the below mentioned spots have been fixed
in it already or not yet.

The patch uses --embed-dir= option that clang plans to add above and doesn't
use other variants on the search directories yet, plus there are no
default directories at least for the time being where to search for embed
files.  So, #embed "..." works if it is found in the same directory (or
relative to the current file's directory) and #embed "/..." or #embed </...>
work always, but relative #embed <...> doesn't unless at least one
--embed-dir= is specified.  There is no reason to differentiate between
system and non-system directories, so we don't need -isystem like
counterpart, perhaps -iquote like counterpart could be useful in the future,
dunno what else.  It has --embed-directory=dir and --embed-directory dir
as aliases.

There are some differences beyond clang ICEs, so I'd like to point them out
to make sure there is agreement on the choices in the patch.  They are also
mentioned in the comments of the llvm pull request.

The most important is that the GCC patch (as well as the original thephd.dev
LLVM branch on godbolt) expands #embed (or acts as if it is expanded) into
a mere sequence of numbers like 123,2,35,26 rather then what clang
effectively treats as (unsigned char)123,(unsigned char)2,(unsigned
char)35,(unsigned char)26 but only does that when using integrated
preprocessor, not when using -save-temps where it acts as GCC.
JeanHeyd as the original author agrees that is how it is currently worded in
C23.

Another difference (not tested in the testsuite, not sure how to check for
effective target /dev/urandom nor am sure it is desirable to check that
during testsuite) is how to treat character devices, named pipes etc.
(block devices are errored on).  The original paper uses /dev/urandom
in various examples and seems to assume that unlike regular files the
devices aren't really cached, so
 #embed </dev/urandom> limit(1) prefix(int a = ) suffix(;)
 #embed </dev/urandom> limit(1) prefix(int b = ) suffix(;)
usually results in a != b.  That is what the godbolt thephd.dev branch
implements too and what this patch does as well, but clang actually seems
to just go from st.st_size == 0, ergo it must be zero-sized resource and
so just copies over if_empty if present.  It is really questionable
what to do about the character devices/named pipes with __has_embed, for
regular files the patch doesn't read anything from them, relies on
st.st_size + limit for whether it is empty or non-empty.  But I don't know
of a way to check if read on say a character device would read anything
or not (the </dev/null> limit (1) vs. </dev/zero> limit (1) cases), and
if we read something, that would be better cached for later because
 #embed later if it reads again could read no further data even when it
first read something.  So, the patch currently for __has_embed just
always returns 2 on the non-regular files, like the thephd.dev
branch does as well and like the clang pull request as well.
A question is also what to do for gnu::offset on the non-regular files
even for #embed, those aren't seekable and do we want to just read and throw
away the offset bytes each time we see it used?

clang also chokes on the
 #if __has_embed (__FILE__ __limit__ (1) __prefix__ () suffix (1 / 0) \
 __if_empty__ ((({{[0[0{0{0(0(0)1)1}1}]]}})))) != __STDC_EMBED_FOUND__
 #error "__has_embed fail"
 #endif
in embed-1.c, but thephd.dev branch accepts it and I don't see why
it shouldn't, (({{[0[0{0{0(0(0)1)1}1}]]}}))) is a balanced token
sequence and the file isn't empty, so it should just be parsed and
discarded.

clang also IMHO mishandles
 const unsigned char w[] = {
 #embed __FILE__ prefix([0] = 42, [15] =) limit(32)
 };
but again only without -save-temps, seems like it
treats it as
[0] = 42, [15] = (99,111,110,115,116,32,117,110,115,105,103,110,101,100,
32,99,104,97,114,32,119,91,93,32,61,32,123,10,35,101,109,98)
rather than
[0] = 42, [15] = 99,111,110,115,116,32,117,110,115,105,103,110,101,100,
32,99,104,97,114,32,119,91,93,32,61,32,123,10,35,101,109,98
and warns on it for -Wunused-value and just compiles it as
[0] = 42, [15] = 98

And also
 void foo (int, int, int, int);
 void bar (void) { foo (
 #embed __FILE__ limit (4) prefix (172 + ) suffix (+ 2)
 ); }
is treated as
172 + (118, 111, 105, 100) + 2
rather than
172 + 118, 111, 105, 100 + 2
which clang -save-temps or GCC treats it like, so results
in just one argument passed rather than 4.

if (!strstr ((const char *) magna_carta, "imprisonétur")) abort ();
in the testcase fails as well, but in that case calling it in gdb succeeds:
p ((char *(*)(char *, char *))__strstr_sse2) (magna_carta, "imprisonétur")
$2 = 0x555555558d3c <magna_carta+11564> "imprisonétur aut disseisiátur"...
so I guess they are just trying to constant evaluate strstr and do it
incorrectly.

They started with making the optimizations together in the initial patch
set, so they don't have the luxury to compare if it is just because of
the optimization they are trying to do or because that is how the
feature works for them.  At least unless they use -save-temps for now.

There is also different behavior between clang and gcc on -M or other
dependency generating options.  Seems clang includes the __has_embed
searched files in dependencies, while my patch doesn't.  But so does
clang for __has_include and GCC doesn't.  Emitting a hard dependency
on some header just because there was __has_include/__has_embed for it
seems wrong to me, because (at least when properly written) the source
likely doesn't mind if the file is missing, it will do something else,
so a hard error from make because of it doesn't seem right.  Does
make have some weaker dependencies, such that if some file can be remade
it is but if it doesn't exist, it isn't fatal?

I wonder whether #embed <non-existent-file> really needs to be fatal
or whether we could simply after diagnosing it pretend the file exists
and is empty.  For #include I think fatal errors make tons of sense,
but perhaps for #embed which is more localized we'd get better error
reporting if we didn't bail out immediately.  Note, both GCC and clang
currently treat those as fatal errors.

clang also added -dE option which with -E instead of preprocessing
the #embed directives keeps them as is, but the preprocessed source
then isn't self-contained.  That option looks more harmful than useful to
me.

Also, it isn't clear to me from C23 whether it is possible to have
__has_include/__has_c_attribute/__has_embed expressions inside of
the limit #embed/__has_embed argument.
6.10.3.2/2 says that defined should not appear there (and the patch
diagnoses it and testsuite tests), but for __has_include/__has_embed
etc. 6.10.1/11 says:
"The identifiers __has_include, __has_embed, and __has_c_attribute
shall not appear in any context not mentioned in this subclause."
If that subclause in that case means 6.10.1, then it presumably shouldn't
appear in #embed in 6.10.3, but __has_embed is in 6.10.1...
But 6.10.3.2/3 says that it should be parsed according to the 6.10.1
rules.  Haven't included tests like
 #if __has_embed (__FILE__ limit (__has_embed (__FILE__ limit (1))))
or
 #embed __FILE__ limit (__has_include (__FILE__))
into the testsuite because of the doubts but I think the patch should
handle those right now.

The reason I've used Magna Carta text in some of the testcases is that
I hope it shouldn't be copyrighted after the centuries and I'd strongly
prefer not to have binary blobs in git after the xz backdoor lesson
and wanted something larger which doesn't change all the time.

Oh, BTW, I see in C23 draft 6.10.3.2 in Example 4
if (f_source == NULL);
  return 1;
(note the spurious semicolon after closing paren), has that been fixed
already?

Like the thephd.dev and clang implementations, the patch always macro
expands the whole #embed and __has_embed directives except for the
embed keyword.  That is most likely not what C23 says, my limited
understanding right now is that in #embed one needs to parse the whole
directive line with macro expansion disabled and check if it satisfies the
grammar, if not, the whole directive is macro expanded, if yes, only
the limit parameter argument is macro expanded and the prefix/suffix/if_empty
arguments are maybe macro expanded when actually used (and not at all if
unused).  And I think __has_embed macro expansion has conflicting rules.

2024-09-12  Jakub Jelinek  <jakub@redhat.com>

	PR c/105863
libcpp/
	* include/cpplib.h: Implement C23 N3017 #embed - a scannable,
	tooling-friendly binary resource inclusion mechanism paper.
	(struct cpp_options): Add embed member.
	(enum cpp_builtin_type): Add BT_HAS_EMBED.
	(cpp_set_include_chains): Add another cpp_dir * argument to
	the declaration.
	* internal.h (enum include_type): Add IT_EMBED.
	(struct cpp_reader): Add embed_include member.
	(struct cpp_embed_params_tokens): New type.
	(struct cpp_embed_params): New type.
	(_cpp_get_token_no_padding): Declare.
	(enum _cpp_find_file_kind): Add _cpp_FFK_EMBED and _cpp_FFK_HAS_EMBED.
	(_cpp_stack_embed): Declare.
	(_cpp_parse_expr): Change return type to cpp_num_part instead of
	bool, change second argument from bool to const char * and add third
	argument.
	(_cpp_parse_embed_params): Declare.
	* directives.cc (DIRECTIVE_TABLE): Add embed entry.
	(end_directive): Don't call skip_rest_of_line for T_EMBED directive.
	(_cpp_handle_directive): Return 2 rather than 1 for T_EMBED in
	directives-only mode.
	(parse_include): Don't Call check_eol for T_EMBED directive.
	(skip_balanced_token_seq): New function.
	(EMBED_PARAMS): Define.
	(enum embed_param_kind): New type.
	(embed_params): New variable.
	(_cpp_parse_embed_params): New function.
	(do_embed): New function.
	(do_if): Adjust _cpp_parse_expr caller.
	(do_elif): Likewise.
	* expr.cc (parse_defined): Diagnose defined in #embed or __has_embed
	parameters.
	(_cpp_parse_expr): Change return type to cpp_num_part instead of
	bool, change second argument from bool to const char * and add third
	argument.  Adjust function comment.  For #embed/__has_embed parameters
	add an artificial CPP_OPEN_PAREN.  Use the second argument DIR
	directly instead of string literals conditional on IS_IF.
	For #embed/__has_embed parameter, stop on reaching CPP_CLOSE_PAREN
	matching the artificial one.  Diagnose negative or too large embed
	parameter operands.
	(num_binary_op): Use #embed instead of #if for diagnostics if inside
	#embed/__has_embed parameter.
	(num_div_op): Likewise.
	* files.cc (struct _cpp_file): Add limit member and embed bitfield.
	(search_cache): Add IS_EMBED argument, formatting fix.  Skip over
	files with different file->embed from the argument.
	(find_file_in_dir): Don't call pch_open_file if file->embed.
	(_cpp_find_file): Handle _cpp_FFK_EMBED and _cpp_FFK_HAS_EMBED.
	(read_file_guts): Formatting fix.
	(has_unique_contents): Ignore file->embed files.
	(search_path_head): Handle IT_EMBED type.
	(_cpp_stack_embed): New function.
	(_cpp_get_file_stat): Formatting fix.
	(cpp_set_include_chains): Add embed argument, save it to
	pfile->embed_include and compute lens for the chain.
	* init.cc (struct lang_flags): Add embed member.
	(lang_defaults): Add embed initializers.
	(cpp_set_lang): Initialize CPP_OPTION (pfile, embed).
	(builtin_array): Add __has_embed entry.
	(cpp_init_builtins): Predefine __STDC_EMBED_NOT_FOUND__,
	__STDC_EMBED_FOUND__ and __STDC_EMBED_EMPTY__.
	* lex.cc (cpp_directive_only_process): Handle #embed.
	* macro.cc (cpp_get_token_no_padding): Rename to ...
	(_cpp_get_token_no_padding): ... this.  No longer static.
	(builtin_has_include_1): New function.
	(builtin_has_include): Use it.  Use _cpp_get_token_no_padding
	instead of cpp_get_token_no_padding.
	(builtin_has_embed): New function.
	(_cpp_builtin_macro_text): Handle BT_HAS_EMBED.
gcc/
	* doc/cppdiropts.texi (--embed-dir=): Document.
	* doc/cpp.texi (Binary Resource Inclusion): New chapter.
	(__has_embed): Document.
	* doc/invoke.texi (Directory Options): Mention --embed-dir=.
	* gcc.cc (cpp_unique_options): Add %{-embed*}.
	* genmatch.cc (main): Adjust cpp_set_include_chains caller.
	* incpath.h (enum incpath_kind): Add INC_EMBED.
	* incpath.cc (merge_include_chains): Handle INC_EMBED.
	(register_include_chains): Adjust cpp_set_include_chains caller.
gcc/c-family/
	* c.opt (-embed-dir=): New option.
	(-embed-directory): New alias.
	(-embed-directory=): New alias.
	* c-opts.cc (c_common_handle_option): Handle OPT__embed_dir_.
gcc/testsuite/
	* c-c++-common/cpp/embed-1.c: New test.
	* c-c++-common/cpp/embed-2.c: New test.
	* c-c++-common/cpp/embed-3.c: New test.
	* c-c++-common/cpp/embed-4.c: New test.
	* c-c++-common/cpp/embed-5.c: New test.
	* c-c++-common/cpp/embed-6.c: New test.
	* c-c++-common/cpp/embed-7.c: New test.
	* c-c++-common/cpp/embed-8.c: New test.
	* c-c++-common/cpp/embed-9.c: New test.
	* c-c++-common/cpp/embed-10.c: New test.
	* c-c++-common/cpp/embed-11.c: New test.
	* c-c++-common/cpp/embed-12.c: New test.
	* c-c++-common/cpp/embed-13.c: New test.
	* c-c++-common/cpp/embed-14.c: New test.
	* c-c++-common/cpp/embed-25.c: New test.
	* c-c++-common/cpp/embed-26.c: New test.
	* c-c++-common/cpp/embed-dir/embed-1.inc: New test.
	* c-c++-common/cpp/embed-dir/embed-3.c: New test.
	* c-c++-common/cpp/embed-dir/embed-4.c: New test.
	* c-c++-common/cpp/embed-dir/magna-carta.txt: New test.
	* gcc.dg/cpp/embed-1.c: New test.
	* gcc.dg/cpp/embed-2.c: New test.
	* gcc.dg/cpp/embed-3.c: New test.
	* gcc.dg/cpp/embed-4.c: New test.
	* g++.dg/cpp/embed-1.C: New test.
	* g++.dg/cpp/embed-2.C: New test.
	* g++.dg/cpp/embed-3.C: New test.

When libcpp encounters a divide by zero while processing a constant
expression "x/y", it returns "x" as a fallback. The value of the fallback is
not normally important, since an error will be generated anyway, but if the
expression appears in an unevaluated context, such as "0 ? 0/0u : -1", then
there will be no error, and the fallback value will be meaningful to the
extent that it may cause promotion from signed to unsigned of an operand
encountered later. As the PR notes, libcpp does not do the unsigned
promotion correctly in this case; fix it by making the fallback return value
unsigned as necessary.

libcpp/ChangeLog:

	PR preprocessor/112701
	* expr.cc (num_div_op): Set unsignedp appropriately when returning a
	stub value for divide by 0.

gcc/testsuite/ChangeLog:

	PR preprocessor/112701
	* gcc.dg/cpp/expr.c: Add additional tests to cover divide by 0 in an
	unevaluated context, where the unsignedness still matters.

Continuing the move to refer to C23 in place of C2X throughout the
source tree, update documentation, diagnostics, comments, variable and
function names, etc., to use the C23 name.

Testsuite updates are left for a future patch, except for testcases
that test diagnostics that previously mentioned C2X (but in those
testcases, sometimes other comments are updated, not just the
diagnostic expectations).

Bootstrapped with no regressions for x86_64-pc-linux-gnu.

gcc/
	* builtins.def (DEF_C2X_BUILTIN): Rename to DEF_C23_BUILTIN and
	use flag_isoc23 and function_c23_misc.
	* config/rl78/rl78.cc (rl78_option_override): Compare
	lang_hooks.name with "GNU C23" not "GNU C2X".
	* coretypes.h (function_c2x_misc): Rename to function_c23_misc.
	* doc/cpp.texi (@code{__has_attribute}): Refer to C23 instead of
	C2x.
	* doc/extend.texi: Likewise.
	* doc/invoke.texi: Likewise.
	* dwarf2out.cc (highest_c_language, gen_compile_unit_die): Compare
	against and return "GNU C23" language string instead of "GNU C2X".
	* ginclude/float.h: Refer to C23 instead of C2X in comments.
	* ginclude/stdint-gcc.h: Likewise.
	* glimits.h: Likewise.
	* tree.h: Likewise.

gcc/ada/
	* gcc-interface/utils.cc (flag_isoc2x): Rename to flag_isoc23.

gcc/c-family/
	* c-common.cc (flag_isoc2x): Rename to flag_isoc23.
	(c_common_reswords): Use D_C23 instead of D_C2X.
	* c-common.h: Refer throughout to C23 instead of C2X in comments.
	(D_C2X): Rename to D_C23.
	(flag_isoc2x): Rename to flag_isoc23.
	* c-cppbuiltin.cc (builtin_define_float_constants): Use
	flag_isoc23 instead of flag_isoc2x.  Refer to C23 instead of C2x
	in comments.
	* c-format.cc: Use STD_C23 instead of STD_C2X and flag_isoc23
	instead of flag_isoc2x.  Refer to C23 instead of C2X in comments.
	* c-format.h: Use STD_C23 instead of STD_C2X.
	* c-lex.cc: Use warn_c11_c23_compat instead of warn_c11_c2x_compat
	and flag_isoc23 instead of flag_isoc2x.  Refer to C23 instead of
	C2X in diagnostics.
	* c-opts.cc: Use flag_isoc23 instead of flag_isoc2x.  Refer to C23
	instead of C2X in comments.
	(set_std_c2x): Rename to set_std_c23.
	* c.opt (Wc11-c23-compat): Use CPP(cpp_warn_c11_c23_compat)
	CppReason(CPP_W_C11_C23_COMPAT) Var(warn_c11_c23_compat) instead
	of CPP(cpp_warn_c11_c2x_compat) CppReason(CPP_W_C11_C2X_COMPAT)
	Var(warn_c11_c2x_compat).

gcc/c/
	* c-decl.cc: Use flag_isoc23 instead of flag_isoc2x and c23_auto_p
	instead of c2x_auto_p.  Refer to C23 instead of C2X in diagnostics
	and comments.
	* c-errors.cc: Use flag_isoc23 instead of flag_isoc2x and
	warn_c11_c23_compat instead of warn_c11_c2x_compat.  Refer to C23
	instead of C2X in comments.
	* c-parser.cc: Use flag_isoc23 instead of flag_isoc2x,
	warn_c11_c23_compat instead of warn_c11_c2x_compat, c23_auto_p
	instead of c2x_auto_p and D_C23 instead of D_C2X.  Refer to C23
	instead of C2X in diagnostics and comments.
	* c-tree.h: Refer to C23 instead of C2X in comments.
	(struct c_declspecs): Rename c2x_auto_p to c23_auto_p.
	* c-typeck.cc: Use flag_isoc23 instead of flag_isoc2x and
	warn_c11_c23_compat instead of warn_c11_c2x_compat.  Refer to C23
	instead of C2X in diagnostics and comments.

gcc/fortran/
	* gfortran.h (gfc_real_info): Refer to C23 instead of C2X in
	comment.

gcc/lto/
	* lto-lang.cc (flag_isoc2x): Rename to flag_isoc23.

gcc/testsuite/
	* gcc.dg/binary-constants-2.c: Refer to C23 instead of C2X.
	* gcc.dg/binary-constants-3.c: Likewise.
	* gcc.dg/bitint-23.c: Likewise.
	* gcc.dg/bitint-26.c: Likewise.
	* gcc.dg/bitint-27.c: Likewise.
	* gcc.dg/c11-attr-syntax-1.c: Likewise.
	* gcc.dg/c11-attr-syntax-2.c: Likewise.
	* gcc.dg/c11-floatn-1.c: Likewise.
	* gcc.dg/c11-floatn-2.c: Likewise.
	* gcc.dg/c11-floatn-3.c: Likewise.
	* gcc.dg/c11-floatn-4.c: Likewise.
	* gcc.dg/c11-floatn-5.c: Likewise.
	* gcc.dg/c11-floatn-6.c: Likewise.
	* gcc.dg/c11-floatn-7.c: Likewise.
	* gcc.dg/c11-floatn-8.c: Likewise.
	* gcc.dg/c2x-attr-syntax-4.c: Likewise.
	* gcc.dg/c2x-attr-syntax-6.c: Likewise.
	* gcc.dg/c2x-attr-syntax-7.c: Likewise.
	* gcc.dg/c2x-binary-constants-2.c: Likewise.
	* gcc.dg/c2x-floatn-5.c: Likewise.
	* gcc.dg/c2x-floatn-6.c: Likewise.
	* gcc.dg/c2x-floatn-7.c: Likewise.
	* gcc.dg/c2x-floatn-8.c: Likewise.
	* gcc.dg/c2x-nullptr-4.c: Likewise.
	* gcc.dg/c2x-qual-2.c: Likewise.
	* gcc.dg/c2x-qual-3.c: Likewise.
	* gcc.dg/c2x-qual-6.c: Likewise.
	* gcc.dg/cpp/c11-warning-1.c: Likewise.
	* gcc.dg/cpp/c11-warning-2.c: Likewise.
	* gcc.dg/cpp/c11-warning-3.c: Likewise.
	* gcc.dg/cpp/c2x-warning-2.c: Likewise.
	* gcc.dg/cpp/gnu11-elifdef-3.c: Likewise.
	* gcc.dg/cpp/gnu11-elifdef-4.c: Likewise.
	* gcc.dg/cpp/gnu11-warning-1.c: Likewise.
	* gcc.dg/cpp/gnu11-warning-2.c: Likewise.
	* gcc.dg/cpp/gnu11-warning-3.c: Likewise.
	* gcc.dg/cpp/gnu2x-warning-2.c: Likewise.
	* gcc.dg/dfp/c11-constants-1.c: Likewise.
	* gcc.dg/dfp/c11-constants-2.c: Likewise.
	* gcc.dg/dfp/c2x-constants-2.c: Likewise.
	* gcc.dg/dfp/constants-pedantic.c: Likewise.
	* gcc.dg/pr30260.c: Likewise.
	* gcc.dg/system-binary-constants-1.c: Likewise.

libcpp/
	* directives.cc: Refer to C23 instead of C2X in diagnostics and
	comments.
	(STDC2X): Rename to STDC23.
	* expr.cc: Use cpp_warn_c11_c23_compat instead of
	cpp_warn_c11_c2x_compat and CPP_W_C11_C23_COMPAT instead of
	CPP_W_C11_C2X_COMPAT.  Refer to C23 instead of C2X in diagnostics
	and comments.
	* include/cpplib.h: Refer to C23 instead of C2X in diagnostics and
	comments.
	(CLK_GNUC2X): Rename to CLK_GNUC23.
	(CLK_STDC2X): Rename to CLK_STDC23.
	(CPP_W_C11_C2X_COMPAT): Rename to CPP_W_C11_C23_COMPAT.
	* init.cc: Use GNUC23 instead of GNUC2X, STDC23 instead of STDC2X
	and cpp_warn_c11_c23_compat instead of cpp_warn_c11_c2x_compat.
	* lex.cc (maybe_va_opt_error): Refer to C23 instead of C2X in
	diagnostic.
	* macro.cc (_cpp_arguments_ok): Refer to C23 instead of C2X in
	comment.

On Wed, Aug 09, 2023 at 09:17:57PM +0000, Joseph Myers wrote:
> > - _Complex _BitInt(N) isn't supported; again mainly because none of the psABIs
> >   mention how those should be passed/returned; in a limited way they are
> >   supported internally because the internal functions into which
> >   __builtin_{add,sub,mul}_overflow{,_p} is lowered return COMPLEX_TYPE as a
> >   hack to return 2 values without using references/pointers
>
> What happens when the usual arithmetic conversions are applied to
> operands, one of which is a complex integer type and the other of which is
> a wider _BitInt type?  I don't see anything in the code to disallow this
> case (which would produce an expression with a _Complex _BitInt type), or
> any testcases for it.

I've added a sorry for that case (+ return the narrower COMPLEX_TYPE).
Also added testcase to verify we don't create VECTOR_TYPEs of BITINT_TYPE
even if they have mode precision and suitable size (others were rejected
already before).

> Other testcases I think should be present (along with any corresponding
> changes needed to the code itself):
>
> * Verifying that the new integer constant suffix is rejected for C++.

Done.

> * Verifying appropriate pedwarn-if-pedantic for the new constant suffix
> for versions of C before C2x (and probably for use of _BitInt type
> specifiers before C2x as well) - along with the expected -Wc11-c2x-compat
> handling (in C2x mode) / -pedantic -Wno-c11-c2x-compat in older modes.

Done.

Here is an incremental patch which does that.

2023-09-06  Jakub Jelinek  <jakub@redhat.com>

	PR c/102989
gcc/c/
	* c-decl.cc (finish_declspecs): Emit pedwarn_c11 on _BitInt.
	* c-typeck.cc (c_common_type): Emit sorry for common type between
	_Complex integer and larger _BitInt and return the _Complex integer.
gcc/c-family/
	* c-attribs.cc (type_valid_for_vector_size): Reject vector types
	with BITINT_TYPE elements even if they have mode precision and
	suitable size.
gcc/testsuite/
	* gcc.dg/bitint-19.c: New test.
	* gcc.dg/bitint-20.c: New test.
	* gcc.dg/bitint-21.c: New test.
	* gcc.dg/bitint-22.c: New test.
	* gcc.dg/bitint-23.c: New test.
	* gcc.dg/bitint-24.c: New test.
	* gcc.dg/bitint-25.c: New test.
	* gcc.dg/bitint-26.c: New test.
	* gcc.dg/bitint-27.c: New test.
	* g++.dg/ext/bitint1.C: New test.
	* g++.dg/ext/bitint2.C: New test.
	* g++.dg/ext/bitint3.C: New test.
	* g++.dg/ext/bitint4.C: New test.
libcpp/
	* expr.cc (cpp_classify_number): Diagnose wb literal suffixes
	for -pedantic* before C2X or -Wc11-c2x-compat.

This patch adds the C FE support, c-family support, small libcpp change
so that 123wb and 42uwb suffixes are handled plus glimits.h change
to define BITINT_MAXWIDTH macro.

The previous patches really do nothing without this, which enables
all the support.

2023-09-06  Jakub Jelinek  <jakub@redhat.com>

	PR c/102989
gcc/
	* glimits.h (BITINT_MAXWIDTH): Define if __BITINT_MAXWIDTH__ is
	predefined.
gcc/c-family/
	* c-common.cc (c_common_reswords): Add _BitInt as keyword.
	(unsafe_conversion_p): Handle BITINT_TYPE like INTEGER_TYPE.
	(c_common_signed_or_unsigned_type): Handle BITINT_TYPE.
	(c_common_truthvalue_conversion, c_common_get_alias_set,
	check_builtin_function_arguments): Handle BITINT_TYPE like
	INTEGER_TYPE.
	(sync_resolve_size): Add ORIG_FORMAT argument.  If
	FETCH && !ORIG_FORMAT, type is BITINT_TYPE, return -1 if size isn't
	one of 1, 2, 4, 8 or 16 or if it is 16 but TImode is not supported.
	(atomic_bitint_fetch_using_cas_loop): New function.
	(resolve_overloaded_builtin): Adjust sync_resolve_size caller.  If
	-1 is returned, use atomic_bitint_fetch_using_cas_loop to lower it.
	Formatting fix.
	(keyword_begins_type_specifier): Handle RID_BITINT.
	* c-common.h (enum rid): Add RID_BITINT enumerator.
	* c-cppbuiltin.cc (c_cpp_builtins): For C call
	targetm.c.bitint_type_info and predefine __BITINT_MAXWIDTH__
	and for -fbuilding-libgcc also __LIBGCC_BITINT_LIMB_WIDTH__ and
	__LIBGCC_BITINT_ORDER__ macros if _BitInt is supported.
	* c-lex.cc (interpret_integer): Handle CPP_N_BITINT.
	* c-pretty-print.cc (c_pretty_printer::simple_type_specifier,
	c_pretty_printer::direct_abstract_declarator,
	c_pretty_printer::direct_declarator, c_pretty_printer::declarator):
	Handle BITINT_TYPE.
	(pp_c_integer_constant): Handle printing of large precision wide_ints
	which would buffer overflow digit_buffer.
	* c-warn.cc (conversion_warning, warnings_for_convert_and_check,
	warnings_for_convert_and_check): Handle BITINT_TYPE like
	INTEGER_TYPE.
gcc/c/
	* c-convert.cc (c_convert): Handle BITINT_TYPE like INTEGER_TYPE.
	* c-decl.cc (check_bitfield_type_and_width): Allow BITINT_TYPE
	bit-fields.
	(finish_struct): Prefer to use BITINT_TYPE for BITINT_TYPE bit-fields
	if possible.
	(declspecs_add_type): Formatting fixes.  Handle cts_bitint.  Adjust
	for added union in *specs.  Handle RID_BITINT.
	(finish_declspecs): Handle cts_bitint.  Adjust for added union
	in *specs.
	* c-parser.cc (c_keyword_starts_typename, c_token_starts_declspecs,
	c_parser_declspecs, c_parser_gnu_attribute_any_word): Handle
	RID_BITINT.
	(c_parser_omp_clause_schedule): Handle BITINT_TYPE like INTEGER_TYPE.
	* c-tree.h (enum c_typespec_keyword): Mention _BitInt in comment.
	Add cts_bitint enumerator.
	(struct c_declspecs): Move int_n_idx and floatn_nx_idx into a union
	and add bitint_prec there as well.
	* c-typeck.cc (c_common_type, comptypes_internal):
	Handle BITINT_TYPE.
	(perform_integral_promotions): Promote BITINT_TYPE bit-fields to
	their declared type.
	(build_array_ref, build_unary_op, build_conditional_expr,
	build_c_cast, convert_for_assignment, digest_init, build_binary_op):
	Handle BITINT_TYPE.
	* c-fold.cc (c_fully_fold_internal): Handle BITINT_TYPE like
	INTEGER_TYPE.
	* c-aux-info.cc (gen_type): Handle BITINT_TYPE.
libcpp/
	* expr.cc (interpret_int_suffix): Handle wb and WB suffixes.
	* include/cpplib.h (CPP_N_BITINT): Define.

Here is a complete patch to add std::bfloat16_t support on
x86 (AArch64 and ARM left for later).  Almost no BFmode optabs
are added by the patch, so for binops/unops it extends to SFmode
first and then truncates back to BFmode.
For {HF,SF,DF,XF,TF}mode -> BFmode conversions libgcc has implementations
of all those conversions so that we avoid double rounding, for
BFmode -> {DF,XF,TF}mode conversions to avoid growing libgcc too much
it emits BFmode -> SFmode conversion first and then converts to the even
wider mode, neither step should be imprecise.
For BFmode -> HFmode, it first emits a precise BFmode -> SFmode conversion
and then SFmode -> HFmode, because neither format is subset or superset
of the other, while SFmode is superset of both.
expr.cc then contains a -ffast-math optimization of the BF -> SF and
SF -> BF conversions if we don't optimize for space (and for the latter
if -frounding-math isn't enabled either).
For x86, perhaps truncsfbf2 optab could be defined for TARGET_AVX512BF16
but IMNSHO should FAIL if !flag_finite_math || flag_rounding_math
|| !flag_unsafe_math_optimizations, because I think the insn doesn't
raise on sNaNs, hardcodes round to nearest and flushes denormals to zero.
By default (unless x86 -fexcess-precision=16) we use float excess
precision for BFmode, so truncate only on explicit casts and assignments.
The patch introduces a single __bf16 builtin - __builtin_nansf16b,
because (__bf16) __builtin_nansf ("") will drop the sNaN into qNaN,
and uses f16b suffix instead of bf16 because there would be ambiguity on
log vs. logb - __builtin_logbf16 could be either log with bf16 suffix
or logb with f16 suffix.  In other cases libstdc++ should mostly use
__builtin_*f for std::bfloat16_t overloads (we have a problem with
std::nextafter though but that one we have also for std::float16_t).

2022-10-14  Jakub Jelinek  <jakub@redhat.com>

gcc/
	* tree-core.h (enum tree_index): Add TI_BFLOAT16_TYPE.
	* tree.h (bfloat16_type_node): Define.
	* tree.cc (excess_precision_type): Promote bfloat16_type_mode
	like float16_type_mode.
	(build_common_tree_nodes): Initialize bfloat16_type_node if
	BFmode is supported.
	* expmed.h (maybe_expand_shift): Declare.
	* expmed.cc (maybe_expand_shift): No longer static.
	* expr.cc (convert_mode_scalar): Don't ICE on BF -> HF or HF -> BF
	conversions.  If there is no optab, handle BF -> {DF,XF,TF,HF}
	conversions as separate BF -> SF -> {DF,XF,TF,HF} conversions, add
	-ffast-math generic implementation for BF -> SF and SF -> BF
	conversions.
	* builtin-types.def (BT_BFLOAT16, BT_FN_BFLOAT16_CONST_STRING): New.
	* builtins.def (BUILT_IN_NANSF16B): New builtin.
	* fold-const-call.cc (fold_const_call): Handle CFN_BUILT_IN_NANSF16B.
	* config/i386/i386.cc (classify_argument): Handle E_BCmode.
	(ix86_libgcc_floating_mode_supported_p): Also return true for BFmode
	for -msse2.
	(ix86_mangle_type): Mangle BFmode as DF16b.
	(ix86_invalid_conversion, ix86_invalid_unary_op,
	ix86_invalid_binary_op): Remove.
	(TARGET_INVALID_CONVERSION, TARGET_INVALID_UNARY_OP,
	TARGET_INVALID_BINARY_OP): Don't redefine.
	* config/i386/i386-builtins.cc (ix86_bf16_type_node): Remove.
	(ix86_register_bf16_builtin_type): Use bfloat16_type_node rather than
	ix86_bf16_type_node, only create it if still NULL.
	* config/i386/i386-builtin-types.def (BFLOAT16): Likewise.
	* config/i386/i386.md (cbranchbf4, cstorebf4): New expanders.
gcc/c-family/
	* c-cppbuiltin.cc (c_cpp_builtins): If bfloat16_type_node,
	predefine __BFLT16_*__ macros and for C++23 also
	__STDCPP_BFLOAT16_T__.  Predefine bfloat16_type_node related
	macros for -fbuilding-libgcc.
	* c-lex.cc (interpret_float): Handle CPP_N_BFLOAT16.
gcc/c/
	* c-typeck.cc (convert_arguments): Don't promote __bf16 to
	double.
gcc/cp/
	* cp-tree.h (extended_float_type_p): Return true for
	bfloat16_type_node.
	* typeck.cc (cp_compare_floating_point_conversion_ranks): Set
	extended{1,2} if mv{1,2} is bfloat16_type_node.  Adjust comment.
gcc/testsuite/
	* lib/target-supports.exp (check_effective_target_bfloat16,
	check_effective_target_bfloat16_runtime, add_options_for_bfloat16):
	New.
	* gcc.dg/torture/bfloat16-basic.c: New test.
	* gcc.dg/torture/bfloat16-builtin.c: New test.
	* gcc.dg/torture/bfloat16-builtin-issignaling-1.c: New test.
	* gcc.dg/torture/bfloat16-complex.c: New test.
	* gcc.dg/torture/builtin-issignaling-1.c: Allow to be includable
	from bfloat16-builtin-issignaling-1.c.
	* gcc.dg/torture/floatn-basic.h: Allow to be includable from
	bfloat16-basic.c.
	* gcc.target/i386/vect-bfloat16-typecheck_2.c: Adjust expected
	diagnostics.
	* gcc.target/i386/sse2-bfloat16-scalar-typecheck.c: Likewise.
	* gcc.target/i386/vect-bfloat16-typecheck_1.c: Likewise.
	* g++.target/i386/bfloat_cpp_typecheck.C: Likewise.
libcpp/
	* include/cpplib.h (CPP_N_BFLOAT16): Define.
	* expr.cc (interpret_float_suffix): Handle bf16 and BF16 suffixes for
	C++.
libgcc/
	* config/i386/t-softfp (softfp_extensions): Add bfsf.
	(softfp_truncations): Add tfbf xfbf dfbf sfbf hfbf.
	(CFLAGS-extendbfsf2.c, CFLAGS-truncsfbf2.c, CFLAGS-truncdfbf2.c,
	CFLAGS-truncxfbf2.c, CFLAGS-trunctfbf2.c, CFLAGS-trunchfbf2.c): Add
	-msse2.
	* config/i386/libgcc-glibc.ver (GCC_13.0.0): Export
	__extendbfsf2 and __trunc{s,d,x,t,h}fbf2.
	* config/i386/sfp-machine.h (_FP_NANSIGN_B): Define.
	* config/i386/64/sfp-machine.h (_FP_NANFRAC_B): Define.
	* config/i386/32/sfp-machine.h (_FP_NANFRAC_B): Define.
	* soft-fp/brain.h: New file.
	* soft-fp/truncsfbf2.c: New file.
	* soft-fp/truncdfbf2.c: New file.
	* soft-fp/truncxfbf2.c: New file.
	* soft-fp/trunctfbf2.c: New file.
	* soft-fp/trunchfbf2.c: New file.
	* soft-fp/truncbfhf2.c: New file.
	* soft-fp/extendbfsf2.c: New file.
libiberty/
	* cp-demangle.h (D_BUILTIN_TYPE_COUNT): Increment.
	* cp-demangle.c (cplus_demangle_builtin_types): Add std::bfloat16_t
	entry.
	(cplus_demangle_type): Demangle DF16b.
	* testsuite/demangle-expected (_Z3xxxDF16b): New test.

c++: Implement P1467R9 - Extended floating-point types and standard names compiler part except for bfloat16 [PR106652]

The following patch implements the compiler part of C++23
P1467R9 - Extended floating-point types and standard names compiler part
by introducing _Float{16,32,64,128} as keywords and builtin types
like they are implemented for C already since GCC 7, with DF{16,32,64,128}_
mangling.
It also introduces _Float{32,64,128}x for C++ with the
https://github.com/itanium-cxx-abi/cxx-abi/pull/147
proposed mangling of DF{32,64,128}x.
The patch doesn't add anything for bfloat16_t support, as right now
__bf16 type refuses all conversions and arithmetic operations.
The patch wants to keep backwards compatibility with how __float128 has
been handled in C++ before, both for mangling and behavior in binary
operations, overload resolution etc.  So, there are some backend changes
where for C __float128 and _Float128 are the same type (float128_type_node
and float128t_type_node are the same pointer), but for C++ they are distinct
types which mangle differently and _Float128 is treated as extended
floating-point type while __float128 is treated as non-standard floating
point type.  The various C++23 changes about how floating-point types
are changed are actually implemented as written in the spec only if at least
one of the types involved is _Float{16,32,64,128,32x,64x,128x} (_FloatNx are
also treated as extended floating-point types) and kept previous behavior
otherwise.  For float/double/long double the rules are actually written that
they behave the same as before.
There is some backwards incompatibility at least on x86 regarding _Float16,
because that type was already used by that name and with the DF16_ mangling
(but only since GCC 12 and I think it isn't that widely used in the wild
yet).  E.g. config/i386/avx512fp16intrin.h shows the issues, where
in C or in GCC 12 in C++ one could pass 0.0f to a builtin taking _Float16
argument, but with the changes that is not possible anymore, one needs
to either use 0.0f16 or (_Float16) 0.0f.
We have also a problem with glibc headers, where since glibc 2.27
math.h and complex.h aren't compilable with these changes.  One gets
errors like:
In file included from /usr/include/math.h:43,
                 from abc.c:1:
/usr/include/bits/floatn.h:86:9: error: multiple types in one declaration
   86 | typedef __float128 _Float128;
      |         ^~~~~~~~~~
/usr/include/bits/floatn.h:86:20: error: declaration does not declare anything [-fpermissive]
   86 | typedef __float128 _Float128;
      |                    ^~~~~~~~~
In file included from /usr/include/bits/floatn.h:119:
/usr/include/bits/floatn-common.h:214:9: error: multiple types in one declaration
  214 | typedef float _Float32;
      |         ^~~~~
/usr/include/bits/floatn-common.h:214:15: error: declaration does not declare anything [-fpermissive]
  214 | typedef float _Float32;
      |               ^~~~~~~~
/usr/include/bits/floatn-common.h:251:9: error: multiple types in one declaration
  251 | typedef double _Float64;
      |         ^~~~~~
/usr/include/bits/floatn-common.h:251:16: error: declaration does not declare anything [-fpermissive]
  251 | typedef double _Float64;
      |                ^~~~~~~~
This is from snippets like:
 /* The remaining of this file provides support for older compilers.  */
 # if __HAVE_FLOAT128

 /* The type _Float128 exists only since GCC 7.0.  */
 #  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
 typedef __float128 _Float128;
 #  endif
where it hardcodes that C++ doesn't have _Float{16,32,64,128,32x,64x,128x} support nor
{f,F}{16,32,64,128}{,x} literal suffixes nor _Complex _Float{16,32,64,128,32x,64x,128x}.
The patch fixincludes this for now and hopefully if this is committed, then
glibc can change those.  The patch changes those
 #  if !__GNUC_PREREQ (7, 0) || defined __cplusplus
conditions to
 #  if !__GNUC_PREREQ (7, 0) || (defined __cplusplus && !__GNUC_PREREQ (13, 0))
Another thing is mangling, as said above, Itanium C++ ABI specifies
DF <number> _ as _Float{16,32,64,128} mangling, but GCC was implementing
a mangling incompatible with that starting with DF for fixed point types.
Fixed point was never supported in C++ though, I believe the reason why
the mangling has been added was that due to a bug it would leak into the
C++ FE through decltype (0.0r) etc.  But that has been shortly after the
mangling was added fixed (I think in the same GCC release cycle), so we
now reject 0.0r etc. in C++.  If we ever need the fixed point mangling,
I think it can be readded but better with a different prefix so that it
doesn't conflict with the published standard manglings.  So, this patch
also kills the fixed point mangling and implements the DF <number> _
demangling.
The patch predefines __STDCPP_FLOAT{16,32,64,128}_T__ macros when
those types are available, but only for C++23, while the underlying types
are available in C++98 and later including the {f,F}{16,32,64,128} literal
suffixes (but those with a pedwarn for C++20 and earlier).  My understanding
is that it needs to be predefined by the compiler, on the other side
predefining even for older modes when <stdfloat> is a new C++23 header
would be weird.  One can find out if _Float{16,32,64,128,32x,64x,128x} is
supported in C++ by
__GNUC__ >= 13 && defined(__FLT{16,32,64,128,32X,64X,128X}_MANT_DIG__)
(but that doesn't work well with older G++ 13 snapshots).

As for std::bfloat16_t, three targets (aarch64, arm and x86) apparently
"support" __bf16 type which has the bfloat16 format, but isn't really
usable, e.g. {aarch64,arm,ix86}_invalid_conversion disallow any conversions
from or to type with BFmode, {aarch64,arm,ix86}_invalid_unary_op disallows
any unary operations on those except for ADDR_EXPR and
{aarch64,arm,ix86}_invalid_binary_op disallows any binary operation on
those.  So, I think we satisfy:
"If the implementation supports an extended floating-point type with the
properties, as specified by ISO/IEC/IEEE 60559, of radix (b) of 2, storage
width in bits (k) of 16, precision in bits (p) of 8, maximum exponent (emax)
of 127, and exponent field width in bits (w) of 8, then the typedef-name
std::bfloat16_t is defined in the header <stdfloat> and names such a type,
the macro __STDCPP_BFLOAT16_T__ is defined, and the floating-point literal
suffixes bf16 and BF16 are supported."
because we don't really support those right now.

2022-09-27  Jakub Jelinek  <jakub@redhat.com>

	PR c++/106652
	PR c++/85518
gcc/
	* tree-core.h (enum tree_index): Add TI_FLOAT128T_TYPE
	enumerator.
	* tree.h (float128t_type_node): Define.
	* tree.cc (build_common_tree_nodes): Initialize float128t_type_node.
	* builtins.def (DEF_FLOATN_BUILTIN): Adjust comment now that
	_Float<N> is supported in C++ too.
	* config/i386/i386.cc (ix86_mangle_type): Only mangle as "g"
	float128t_type_node.
	* config/i386/i386-builtins.cc (ix86_init_builtin_types): Use
	float128t_type_node for __float128 instead of float128_type_node
	and create it if NULL.
	* config/i386/avx512fp16intrin.h (_mm_setzero_ph, _mm256_setzero_ph,
	_mm512_setzero_ph, _mm_set_sh, _mm_load_sh): Use 0.0f16 instead of
	0.0f.
	* config/ia64/ia64.cc (ia64_init_builtins): Use
	float128t_type_node for __float128 instead of float128_type_node
	and create it if NULL.
	* config/rs6000/rs6000-c.cc (is_float128_p): Also return true
	for float128t_type_node if non-NULL.
	* config/rs6000/rs6000.cc (rs6000_mangle_type): Don't mangle
	float128_type_node as "u9__ieee128".
	* config/rs6000/rs6000-builtin.cc (rs6000_init_builtins): Use
	float128t_type_node for __float128 instead of float128_type_node
	and create it if NULL.
gcc/c-family/
	* c-common.cc (c_common_reswords): Change _Float{16,32,64,128} and
	_Float{32,64,128}x flags from D_CONLY to 0.
	(shorten_binary_op): Punt if common_type returns error_mark_node.
	(shorten_compare): Likewise.
	(c_common_nodes_and_builtins): For C++ record _Float{16,32,64,128}
	and _Float{32,64,128}x builtin types if available.  For C++
	clear float128t_type_node.
	* c-cppbuiltin.cc (c_cpp_builtins): Predefine
	__STDCPP_FLOAT{16,32,64,128}_T__ for C++23 if supported.
	* c-lex.cc (interpret_float): For q/Q suffixes prefer
	float128t_type_node over float128_type_node.  Allow
	{f,F}{16,32,64,128} suffixes for C++ if supported with pedwarn
	for C++20 and older.  Allow {f,F}{32,64,128}x suffixes for C++
	with pedwarn.  Don't call excess_precision_type for C++.
gcc/cp/
	* cp-tree.h (cp_compare_floating_point_conversion_ranks): Implement
	P1467R9 - Extended floating-point types and standard names except
	for std::bfloat16_t for now.  Declare.
	(extended_float_type_p): New inline function.
	* mangle.cc (write_builtin_type): Mangle float{16,32,64,128}_type_node
	as DF{16,32,64,128}_.  Mangle float{32,64,128}x_type_node as
	DF{32,64,128}x.  Remove FIXED_POINT_TYPE mangling that conflicts
	with that.
	* typeck2.cc (check_narrowing): If one of ftype or type is extended
	floating-point type, compare floating-point conversion ranks.
	* parser.cc (cp_keyword_starts_decl_specifier_p): Handle
	CASE_RID_FLOATN_NX.
	(cp_parser_simple_type_specifier): Likewise and diagnose missing
	_Float<N> or _Float<N>x support if not supported by target.
	* typeck.cc (cp_compare_floating_point_conversion_ranks): New function.
	(cp_common_type): If both types are REAL_TYPE and one or both are
	extended floating-point types, select common type based on comparison
	of floating-point conversion ranks and subranks.
	(cp_build_binary_op): Diagnose operation with floating point arguments
	with unordered conversion ranks.
	* call.cc (standard_conversion): For floating-point conversion, if
	either from or to are extended floating-point types, set conv->bad_p
	for implicit conversion from larger to smaller conversion rank or
	with unordered conversion ranks.
	(convert_like_internal): Emit a pedwarn on such conversions.
	(build_conditional_expr): Diagnose operation with floating point
	arguments with unordered conversion ranks.
	(convert_arg_to_ellipsis): Don't promote extended floating-point types
	narrower than double to double.
	(compare_ics): Implement P1467R9 [over.ics.rank]/4 changes.
gcc/testsuite/
	* g++.dg/cpp23/ext-floating1.C: New test.
	* g++.dg/cpp23/ext-floating2.C: New test.
	* g++.dg/cpp23/ext-floating3.C: New test.
	* g++.dg/cpp23/ext-floating4.C: New test.
	* g++.dg/cpp23/ext-floating5.C: New test.
	* g++.dg/cpp23/ext-floating6.C: New test.
	* g++.dg/cpp23/ext-floating7.C: New test.
	* g++.dg/cpp23/ext-floating8.C: New test.
	* g++.dg/cpp23/ext-floating9.C: New test.
	* g++.dg/cpp23/ext-floating10.C: New test.
	* g++.dg/cpp23/ext-floating.h: New file.
	* g++.target/i386/float16-1.C: Adjust expected diagnostics.
libcpp/
	* expr.cc (interpret_float_suffix): Allow {f,F}{16,32,64,128} and
	{f,F}{32,64,128}x suffixes for C++.
include/
	* demangle.h (enum demangle_component_type): Add
	DEMANGLE_COMPONENT_EXTENDED_BUILTIN_TYPE.
	(struct demangle_component): Add u.s_extended_builtin member.
libiberty/
	* cp-demangle.c (d_dump): Handle
	DEMANGLE_COMPONENT_EXTENDED_BUILTIN_TYPE.  Don't handle
	DEMANGLE_COMPONENT_FIXED_TYPE.
	(d_make_extended_builtin_type): New function.
	(cplus_demangle_builtin_types): Add _Float entry.
	(cplus_demangle_type): For DF demangle it as _Float<N> or
	_Float<N>x rather than fixed point which conflicts with it.
	(d_count_templates_scopes): Handle
	DEMANGLE_COMPONENT_EXTENDED_BUILTIN_TYPE.  Just break; for
	DEMANGLE_COMPONENT_FIXED_TYPE.
	(d_find_pack): Handle DEMANGLE_COMPONENT_EXTENDED_BUILTIN_TYPE.
	Don't handle DEMANGLE_COMPONENT_FIXED_TYPE.
	(d_print_comp_inner): Likewise.
	* cp-demangle.h (D_BUILTIN_TYPE_COUNT): Bump.
	* testsuite/demangle-expected: Replace _Z3xxxDFyuVb test
	with _Z3xxxDF16_DF32_DF64_DF128_CDF16_Vb.  Add
	_Z3xxxDF32xDF64xDF128xCDF32xVb test.
fixincludes/
	* inclhack.def (glibc_cxx_floatn_1, glibc_cxx_floatn_2,
	glibc_cxx_floatn_3): New fixes.
	* tests/base/bits/floatn.h: New file.
	* fixincl.x: Regenerated.

C2x follows C++ in making alignas, alignof, bool, false,
static_assert, thread_local and true keywords; implement this
accordingly.  This implementation makes them normal keywords in C2x
mode just like any other keyword (C2x leaves open the possibility of
implementation using predefined macros instead - thus, there aren't
any testcases asserting that they aren't macros).  As in C++ and
previous versions of C, true and false are handled like signed 1 and 0
in #if (there was an intermediate state in some C2x drafts where they
had different macro expansions that were unsigned in #if).

Bootstrapped with no regressions for x86_64-pc-linux-gnu.

As with the removal of unprototyped functions, this change has a high
risk of breaking some old code and people doing GNU/Linux distribution
builds may wish to see how much is broken in a build with a -std=gnu2x
default.

gcc/
	* ginclude/stdalign.h [defined __STDC_VERSION__ &&
	__STDC_VERSION__ > 201710L]: Disable all content.
	* ginclude/stdbool.h [defined __STDC_VERSION__ && __STDC_VERSION__
	> 201710L] (bool, true, false): Do not define.

gcc/c-family/
	* c-common.cc (c_common_reswords): Use D_C2X instead of D_CXXONLY
	for alignas, alignof, bool, false, static_assert, thread_local and
	true.

gcc/c/
	* c-parser.cc (c_parser_static_assert_declaration_no_semi)
	(c_parser_alignas_specifier, c_parser_alignof_expression): Allow
	for C2x spellings of keywords.
	(c_parser_postfix_expression): Handle RID_TRUE and RID_FALSE.

gcc/testsuite/
	* gcc.dg/c11-keywords-1.c, gcc.dg/c2x-align-1.c,
	gcc.dg/c2x-align-6.c, gcc.dg/c2x-bool-2.c,
	gcc.dg/c2x-static-assert-3.c, gcc.dg/c2x-static-assert-4.c,
	gcc.dg/c2x-thread-local-1.c: New tests.
	* gcc.dg/c2x-bool-1.c: Update expectations.

libcpp/
	* include/cpplib.h (struct cpp_options): Add true_false.
	* expr.cc (eval_token): Check true_false not cplusplus to
	determine whether to handle true and false keywords.
	* init.cc (struct lang_flags): Add true_false.
	(lang_defaults): Update.
	(cpp_set_lang): Set true_false.

The first part of the following testcase (m1-m3 macros and its use)
regressed with my PR89971 fix, but as the m1,m4-m5 and its use part shows,
the problem isn't new, we can emit a CPP_PADDING token to avoid it from
being adjacent to whatever comes after the __VA_OPT__ (in this case there
is nothing afterwards, true).

In most cases these CPP_PADDING tokens don't matter, all other
callers of cpp_get_token_with_location either ignore CPP_PADDING tokens
completely (e.g. c_lex_with_flags) or they just remember them and
take them into account when printing stuff whether there should be
added whitespace or not (scan_translation_unit + token_streamer::stream).
So, I think we should just ignore CPP_PADDING tokens the same way in
_cpp_parse_expr.

2022-05-27  Jakub Jelinek  <jakub@redhat.com>

	PR preprocessor/105732
	* expr.cc (_cpp_parse_expr): Handle CPP_PADDING by just another
	token.

	* c-c++-common/cpp/va-opt-10.c: New test.

gcc/ada/ChangeLog:

	* adadecode.c: Moved to...
	* adadecode.cc: ...here.
	* affinity.c: Moved to...
	* affinity.cc: ...here.
	* argv-lynxos178-raven-cert.c: Moved to...
	* argv-lynxos178-raven-cert.cc: ...here.
	* argv.c: Moved to...
	* argv.cc: ...here.
	* aux-io.c: Moved to...
	* aux-io.cc: ...here.
	* cio.c: Moved to...
	* cio.cc: ...here.
	* cstreams.c: Moved to...
	* cstreams.cc: ...here.
	* env.c: Moved to...
	* env.cc: ...here.
	* exit.c: Moved to...
	* exit.cc: ...here.
	* expect.c: Moved to...
	* expect.cc: ...here.
	* final.c: Moved to...
	* final.cc: ...here.
	* gcc-interface/cuintp.c: Moved to...
	* gcc-interface/cuintp.cc: ...here.
	* gcc-interface/decl.c: Moved to...
	* gcc-interface/decl.cc: ...here.
	* gcc-interface/misc.c: Moved to...
	* gcc-interface/misc.cc: ...here.
	* gcc-interface/targtyps.c: Moved to...
	* gcc-interface/targtyps.cc: ...here.
	* gcc-interface/trans.c: Moved to...
	* gcc-interface/trans.cc: ...here.
	* gcc-interface/utils.c: Moved to...
	* gcc-interface/utils.cc: ...here.
	* gcc-interface/utils2.c: Moved to...
	* gcc-interface/utils2.cc: ...here.
	* init.c: Moved to...
	* init.cc: ...here.
	* initialize.c: Moved to...
	* initialize.cc: ...here.
	* libgnarl/thread.c: Moved to...
	* libgnarl/thread.cc: ...here.
	* link.c: Moved to...
	* link.cc: ...here.
	* locales.c: Moved to...
	* locales.cc: ...here.
	* mkdir.c: Moved to...
	* mkdir.cc: ...here.
	* raise.c: Moved to...
	* raise.cc: ...here.
	* rtfinal.c: Moved to...
	* rtfinal.cc: ...here.
	* rtinit.c: Moved to...
	* rtinit.cc: ...here.
	* seh_init.c: Moved to...
	* seh_init.cc: ...here.
	* sigtramp-armdroid.c: Moved to...
	* sigtramp-armdroid.cc: ...here.
	* sigtramp-ios.c: Moved to...
	* sigtramp-ios.cc: ...here.
	* sigtramp-qnx.c: Moved to...
	* sigtramp-qnx.cc: ...here.
	* sigtramp-vxworks.c: Moved to...
	* sigtramp-vxworks.cc: ...here.
	* socket.c: Moved to...
	* socket.cc: ...here.
	* tracebak.c: Moved to...
	* tracebak.cc: ...here.
	* version.c: Moved to...
	* version.cc: ...here.
	* vx_stack_info.c: Moved to...
	* vx_stack_info.cc: ...here.

gcc/ChangeLog:

	* adjust-alignment.c: Moved to...
	* adjust-alignment.cc: ...here.
	* alias.c: Moved to...
	* alias.cc: ...here.
	* alloc-pool.c: Moved to...
	* alloc-pool.cc: ...here.
	* asan.c: Moved to...
	* asan.cc: ...here.
	* attribs.c: Moved to...
	* attribs.cc: ...here.
	* auto-inc-dec.c: Moved to...
	* auto-inc-dec.cc: ...here.
	* auto-profile.c: Moved to...
	* auto-profile.cc: ...here.
	* bb-reorder.c: Moved to...
	* bb-reorder.cc: ...here.
	* bitmap.c: Moved to...
	* bitmap.cc: ...here.
	* btfout.c: Moved to...
	* btfout.cc: ...here.
	* builtins.c: Moved to...
	* builtins.cc: ...here.
	* caller-save.c: Moved to...
	* caller-save.cc: ...here.
	* calls.c: Moved to...
	* calls.cc: ...here.
	* ccmp.c: Moved to...
	* ccmp.cc: ...here.
	* cfg.c: Moved to...
	* cfg.cc: ...here.
	* cfganal.c: Moved to...
	* cfganal.cc: ...here.
	* cfgbuild.c: Moved to...
	* cfgbuild.cc: ...here.
	* cfgcleanup.c: Moved to...
	* cfgcleanup.cc: ...here.
	* cfgexpand.c: Moved to...
	* cfgexpand.cc: ...here.
	* cfghooks.c: Moved to...
	* cfghooks.cc: ...here.
	* cfgloop.c: Moved to...
	* cfgloop.cc: ...here.
	* cfgloopanal.c: Moved to...
	* cfgloopanal.cc: ...here.
	* cfgloopmanip.c: Moved to...
	* cfgloopmanip.cc: ...here.
	* cfgrtl.c: Moved to...
	* cfgrtl.cc: ...here.
	* cgraph.c: Moved to...
	* cgraph.cc: ...here.
	* cgraphbuild.c: Moved to...
	* cgraphbuild.cc: ...here.
	* cgraphclones.c: Moved to...
	* cgraphclones.cc: ...here.
	* cgraphunit.c: Moved to...
	* cgraphunit.cc: ...here.
	* collect-utils.c: Moved to...
	* collect-utils.cc: ...here.
	* collect2-aix.c: Moved to...
	* collect2-aix.cc: ...here.
	* collect2.c: Moved to...
	* collect2.cc: ...here.
	* combine-stack-adj.c: Moved to...
	* combine-stack-adj.cc: ...here.
	* combine.c: Moved to...
	* combine.cc: ...here.
	* common/common-targhooks.c: Moved to...
	* common/common-targhooks.cc: ...here.
	* common/config/aarch64/aarch64-common.c: Moved to...
	* common/config/aarch64/aarch64-common.cc: ...here.
	* common/config/alpha/alpha-common.c: Moved to...
	* common/config/alpha/alpha-common.cc: ...here.
	* common/config/arc/arc-common.c: Moved to...
	* common/config/arc/arc-common.cc: ...here.
	* common/config/arm/arm-common.c: Moved to...
	* common/config/arm/arm-common.cc: ...here.
	* common/config/avr/avr-common.c: Moved to...
	* common/config/avr/avr-common.cc: ...here.
	* common/config/bfin/bfin-common.c: Moved to...
	* common/config/bfin/bfin-common.cc: ...here.
	* common/config/bpf/bpf-common.c: Moved to...
	* common/config/bpf/bpf-common.cc: ...here.
	* common/config/c6x/c6x-common.c: Moved to...
	* common/config/c6x/c6x-common.cc: ...here.
	* common/config/cr16/cr16-common.c: Moved to...
	* common/config/cr16/cr16-common.cc: ...here.
	* common/config/cris/cris-common.c: Moved to...
	* common/config/cris/cris-common.cc: ...here.
	* common/config/csky/csky-common.c: Moved to...
	* common/config/csky/csky-common.cc: ...here.
	* common/config/default-common.c: Moved to...
	* common/config/default-common.cc: ...here.
	* common/config/epiphany/epiphany-common.c: Moved to...
	* common/config/epiphany/epiphany-common.cc: ...here.
	* common/config/fr30/fr30-common.c: Moved to...
	* common/config/fr30/fr30-common.cc: ...here.
	* common/config/frv/frv-common.c: Moved to...
	* common/config/frv/frv-common.cc: ...here.
	* common/config/gcn/gcn-common.c: Moved to...
	* common/config/gcn/gcn-common.cc: ...here.
	* common/config/h8300/h8300-common.c: Moved to...
	* common/config/h8300/h8300-common.cc: ...here.
	* common/config/i386/i386-common.c: Moved to...
	* common/config/i386/i386-common.cc: ...here.
	* common/config/ia64/ia64-common.c: Moved to...
	* common/config/ia64/ia64-common.cc: ...here.
	* common/config/iq2000/iq2000-common.c: Moved to...
	* common/config/iq2000/iq2000-common.cc: ...here.
	* common/config/lm32/lm32-common.c: Moved to...
	* common/config/lm32/lm32-common.cc: ...here.
	* common/config/m32r/m32r-common.c: Moved to...
	* common/config/m32r/m32r-common.cc: ...here.
	* common/config/m68k/m68k-common.c: Moved to...
	* common/config/m68k/m68k-common.cc: ...here.
	* common/config/mcore/mcore-common.c: Moved to...
	* common/config/mcore/mcore-common.cc: ...here.
	* common/config/microblaze/microblaze-common.c: Moved to...
	* common/config/microblaze/microblaze-common.cc: ...here.
	* common/config/mips/mips-common.c: Moved to...
	* common/config/mips/mips-common.cc: ...here.
	* common/config/mmix/mmix-common.c: Moved to...
	* common/config/mmix/mmix-common.cc: ...here.
	* common/config/mn10300/mn10300-common.c: Moved to...
	* common/config/mn10300/mn10300-common.cc: ...here.
	* common/config/msp430/msp430-common.c: Moved to...
	* common/config/msp430/msp430-common.cc: ...here.
	* common/config/nds32/nds32-common.c: Moved to...
	* common/config/nds32/nds32-common.cc: ...here.
	* common/config/nios2/nios2-common.c: Moved to...
	* common/config/nios2/nios2-common.cc: ...here.
	* common/config/nvptx/nvptx-common.c: Moved to...
	* common/config/nvptx/nvptx-common.cc: ...here.
	* common/config/or1k/or1k-common.c: Moved to...
	* common/config/or1k/or1k-common.cc: ...here.
	* common/config/pa/pa-common.c: Moved to...
	* common/config/pa/pa-common.cc: ...here.
	* common/config/pdp11/pdp11-common.c: Moved to...
	* common/config/pdp11/pdp11-common.cc: ...here.
	* common/config/pru/pru-common.c: Moved to...
	* common/config/pru/pru-common.cc: ...here.
	* common/config/riscv/riscv-common.c: Moved to...
	* common/config/riscv/riscv-common.cc: ...here.
	* common/config/rs6000/rs6000-common.c: Moved to...
	* common/config/rs6000/rs6000-common.cc: ...here.
	* common/config/rx/rx-common.c: Moved to...
	* common/config/rx/rx-common.cc: ...here.
	* common/config/s390/s390-common.c: Moved to...
	* common/config/s390/s390-common.cc: ...here.
	* common/config/sh/sh-common.c: Moved to...
	* common/config/sh/sh-common.cc: ...here.
	* common/config/sparc/sparc-common.c: Moved to...
	* common/config/sparc/sparc-common.cc: ...here.
	* common/config/tilegx/tilegx-common.c: Moved to...
	* common/config/tilegx/tilegx-common.cc: ...here.
	* common/config/tilepro/tilepro-common.c: Moved to...
	* common/config/tilepro/tilepro-common.cc: ...here.
	* common/config/v850/v850-common.c: Moved to...
	* common/config/v850/v850-common.cc: ...here.
	* common/config/vax/vax-common.c: Moved to...
	* common/config/vax/vax-common.cc: ...here.
	* common/config/visium/visium-common.c: Moved to...
	* common/config/visium/visium-common.cc: ...here.
	* common/config/xstormy16/xstormy16-common.c: Moved to...
	* common/config/xstormy16/xstormy16-common.cc: ...here.
	* common/config/xtensa/xtensa-common.c: Moved to...
	* common/config/xtensa/xtensa-common.cc: ...here.
	* compare-elim.c: Moved to...
	* compare-elim.cc: ...here.
	* config/aarch64/aarch64-bti-insert.c: Moved to...
	* config/aarch64/aarch64-bti-insert.cc: ...here.
	* config/aarch64/aarch64-builtins.c: Moved to...
	* config/aarch64/aarch64-builtins.cc: ...here.
	* config/aarch64/aarch64-c.c: Moved to...
	* config/aarch64/aarch64-c.cc: ...here.
	* config/aarch64/aarch64-d.c: Moved to...
	* config/aarch64/aarch64-d.cc: ...here.
	* config/aarch64/aarch64.c: Moved to...
	* config/aarch64/aarch64.cc: ...here.
	* config/aarch64/cortex-a57-fma-steering.c: Moved to...
	* config/aarch64/cortex-a57-fma-steering.cc: ...here.
	* config/aarch64/driver-aarch64.c: Moved to...
	* config/aarch64/driver-aarch64.cc: ...here.
	* config/aarch64/falkor-tag-collision-avoidance.c: Moved to...
	* config/aarch64/falkor-tag-collision-avoidance.cc: ...here.
	* config/aarch64/host-aarch64-darwin.c: Moved to...
	* config/aarch64/host-aarch64-darwin.cc: ...here.
	* config/alpha/alpha.c: Moved to...
	* config/alpha/alpha.cc: ...here.
	* config/alpha/driver-alpha.c: Moved to...
	* config/alpha/driver-alpha.cc: ...here.
	* config/arc/arc-c.c: Moved to...
	* config/arc/arc-c.cc: ...here.
	* config/arc/arc.c: Moved to...
	* config/arc/arc.cc: ...here.
	* config/arc/driver-arc.c: Moved to...
	* config/arc/driver-arc.cc: ...here.
	* config/arm/aarch-common.c: Moved to...
	* config/arm/aarch-common.cc: ...here.
	* config/arm/arm-builtins.c: Moved to...
	* config/arm/arm-builtins.cc: ...here.
	* config/arm/arm-c.c: Moved to...
	* config/arm/arm-c.cc: ...here.
	* config/arm/arm-d.c: Moved to...
	* config/arm/arm-d.cc: ...here.
	* config/arm/arm.c: Moved to...
	* config/arm/arm.cc: ...here.
	* config/arm/driver-arm.c: Moved to...
	* config/arm/driver-arm.cc: ...here.
	* config/avr/avr-c.c: Moved to...
	* config/avr/avr-c.cc: ...here.
	* config/avr/avr-devices.c: Moved to...
	* config/avr/avr-devices.cc: ...here.
	* config/avr/avr-log.c: Moved to...
	* config/avr/avr-log.cc: ...here.
	* config/avr/avr.c: Moved to...
	* config/avr/avr.cc: ...here.
	* config/avr/driver-avr.c: Moved to...
	* config/avr/driver-avr.cc: ...here.
	* config/avr/gen-avr-mmcu-specs.c: Moved to...
	* config/avr/gen-avr-mmcu-specs.cc: ...here.
	* config/avr/gen-avr-mmcu-texi.c: Moved to...
	* config/avr/gen-avr-mmcu-texi.cc: ...here.
	* config/bfin/bfin.c: Moved to...
	* config/bfin/bfin.cc: ...here.
	* config/bpf/bpf.c: Moved to...
	* config/bpf/bpf.cc: ...here.
	* config/bpf/coreout.c: Moved to...
	* config/bpf/coreout.cc: ...here.
	* config/c6x/c6x.c: Moved to...
	* config/c6x/c6x.cc: ...here.
	* config/cr16/cr16.c: Moved to...
	* config/cr16/cr16.cc: ...here.
	* config/cris/cris.c: Moved to...
	* config/cris/cris.cc: ...here.
	* config/csky/csky.c: Moved to...
	* config/csky/csky.cc: ...here.
	* config/darwin-c.c: Moved to...
	* config/darwin-c.cc: ...here.
	* config/darwin-d.c: Moved to...
	* config/darwin-d.cc: ...here.
	* config/darwin-driver.c: Moved to...
	* config/darwin-driver.cc: ...here.
	* config/darwin-f.c: Moved to...
	* config/darwin-f.cc: ...here.
	* config/darwin.c: Moved to...
	* config/darwin.cc: ...here.
	* config/default-c.c: Moved to...
	* config/default-c.cc: ...here.
	* config/default-d.c: Moved to...
	* config/default-d.cc: ...here.
	* config/dragonfly-d.c: Moved to...
	* config/dragonfly-d.cc: ...here.
	* config/epiphany/epiphany.c: Moved to...
	* config/epiphany/epiphany.cc: ...here.
	* config/epiphany/mode-switch-use.c: Moved to...
	* config/epiphany/mode-switch-use.cc: ...here.
	* config/epiphany/resolve-sw-modes.c: Moved to...
	* config/epiphany/resolve-sw-modes.cc: ...here.
	* config/fr30/fr30.c: Moved to...
	* config/fr30/fr30.cc: ...here.
	* config/freebsd-d.c: Moved to...
	* config/freebsd-d.cc: ...here.
	* config/frv/frv.c: Moved to...
	* config/frv/frv.cc: ...here.
	* config/ft32/ft32.c: Moved to...
	* config/ft32/ft32.cc: ...here.
	* config/gcn/driver-gcn.c: Moved to...
	* config/gcn/driver-gcn.cc: ...here.
	* config/gcn/gcn-run.c: Moved to...
	* config/gcn/gcn-run.cc: ...here.
	* config/gcn/gcn-tree.c: Moved to...
	* config/gcn/gcn-tree.cc: ...here.
	* config/gcn/gcn.c: Moved to...
	* config/gcn/gcn.cc: ...here.
	* config/gcn/mkoffload.c: Moved to...
	* config/gcn/mkoffload.cc: ...here.
	* config/glibc-c.c: Moved to...
	* config/glibc-c.cc: ...here.
	* config/glibc-d.c: Moved to...
	* config/glibc-d.cc: ...here.
	* config/h8300/h8300.c: Moved to...
	* config/h8300/h8300.cc: ...here.
	* config/host-darwin.c: Moved to...
	* config/host-darwin.cc: ...here.
	* config/host-hpux.c: Moved to...
	* config/host-hpux.cc: ...here.
	* config/host-linux.c: Moved to...
	* config/host-linux.cc: ...here.
	* config/host-netbsd.c: Moved to...
	* config/host-netbsd.cc: ...here.
	* config/host-openbsd.c: Moved to...
	* config/host-openbsd.cc: ...here.
	* config/host-solaris.c: Moved to...
	* config/host-solaris.cc: ...here.
	* config/i386/djgpp.c: Moved to...
	* config/i386/djgpp.cc: ...here.
	* config/i386/driver-i386.c: Moved to...
	* config/i386/driver-i386.cc: ...here.
	* config/i386/driver-mingw32.c: Moved to...
	* config/i386/driver-mingw32.cc: ...here.
	* config/i386/gnu-property.c: Moved to...
	* config/i386/gnu-property.cc: ...here.
	* config/i386/host-cygwin.c: Moved to...
	* config/i386/host-cygwin.cc: ...here.
	* config/i386/host-i386-darwin.c: Moved to...
	* config/i386/host-i386-darwin.cc: ...here.
	* config/i386/host-mingw32.c: Moved to...
	* config/i386/host-mingw32.cc: ...here.
	* config/i386/i386-builtins.c: Moved to...
	* config/i386/i386-builtins.cc: ...here.
	* config/i386/i386-c.c: Moved to...
	* config/i386/i386-c.cc: ...here.
	* config/i386/i386-d.c: Moved to...
	* config/i386/i386-d.cc: ...here.
	* config/i386/i386-expand.c: Moved to...
	* config/i386/i386-expand.cc: ...here.
	* config/i386/i386-features.c: Moved to...
	* config/i386/i386-features.cc: ...here.
	* config/i386/i386-options.c: Moved to...
	* config/i386/i386-options.cc: ...here.
	* config/i386/i386.c: Moved to...
	* config/i386/i386.cc: ...here.
	* config/i386/intelmic-mkoffload.c: Moved to...
	* config/i386/intelmic-mkoffload.cc: ...here.
	* config/i386/msformat-c.c: Moved to...
	* config/i386/msformat-c.cc: ...here.
	* config/i386/winnt-cxx.c: Moved to...
	* config/i386/winnt-cxx.cc: ...here.
	* config/i386/winnt-d.c: Moved to...
	* config/i386/winnt-d.cc: ...here.
	* config/i386/winnt-stubs.c: Moved to...
	* config/i386/winnt-stubs.cc: ...here.
	* config/i386/winnt.c: Moved to...
	* config/i386/winnt.cc: ...here.
	* config/i386/x86-tune-sched-atom.c: Moved to...
	* config/i386/x86-tune-sched-atom.cc: ...here.
	* config/i386/x86-tune-sched-bd.c: Moved to...
	* config/i386/x86-tune-sched-bd.cc: ...here.
	* config/i386/x86-tune-sched-core.c: Moved to...
	* config/i386/x86-tune-sched-core.cc: ...here.
	* config/i386/x86-tune-sched.c: Moved to...
	* config/i386/x86-tune-sched.cc: ...here.
	* config/ia64/ia64-c.c: Moved to...
	* config/ia64/ia64-c.cc: ...here.
	* config/ia64/ia64.c: Moved to...
	* config/ia64/ia64.cc: ...here.
	* config/iq2000/iq2000.c: Moved to...
	* config/iq2000/iq2000.cc: ...here.
	* config/linux.c: Moved to...
	* config/linux.cc: ...here.
	* config/lm32/lm32.c: Moved to...
	* config/lm32/lm32.cc: ...here.
	* config/m32c/m32c-pragma.c: Moved to...
	* config/m32c/m32c-pragma.cc: ...here.
	* config/m32c/m32c.c: Moved to...
	* config/m32c/m32c.cc: ...here.
	* config/m32r/m32r.c: Moved to...
	* config/m32r/m32r.cc: ...here.
	* config/m68k/m68k.c: Moved to...
	* config/m68k/m68k.cc: ...here.
	* config/mcore/mcore.c: Moved to...
	* config/mcore/mcore.cc: ...here.
	* config/microblaze/microblaze-c.c: Moved to...
	* config/microblaze/microblaze-c.cc: ...here.
	* config/microblaze/microblaze.c: Moved to...
	* config/microblaze/microblaze.cc: ...here.
	* config/mips/driver-native.c: Moved to...
	* config/mips/driver-native.cc: ...here.
	* config/mips/frame-header-opt.c: Moved to...
	* config/mips/frame-header-opt.cc: ...here.
	* config/mips/mips-d.c: Moved to...
	* config/mips/mips-d.cc: ...here.
	* config/mips/mips.c: Moved to...
	* config/mips/mips.cc: ...here.
	* config/mmix/mmix.c: Moved to...
	* config/mmix/mmix.cc: ...here.
	* config/mn10300/mn10300.c: Moved to...
	* config/mn10300/mn10300.cc: ...here.
	* config/moxie/moxie.c: Moved to...
	* config/moxie/moxie.cc: ...here.
	* config/msp430/driver-msp430.c: Moved to...
	* config/msp430/driver-msp430.cc: ...here.
	* config/msp430/msp430-c.c: Moved to...
	* config/msp430/msp430-c.cc: ...here.
	* config/msp430/msp430-devices.c: Moved to...
	* config/msp430/msp430-devices.cc: ...here.
	* config/msp430/msp430.c: Moved to...
	* config/msp430/msp430.cc: ...here.
	* config/nds32/nds32-cost.c: Moved to...
	* config/nds32/nds32-cost.cc: ...here.
	* config/nds32/nds32-fp-as-gp.c: Moved to...
	* config/nds32/nds32-fp-as-gp.cc: ...here.
	* config/nds32/nds32-intrinsic.c: Moved to...
	* config/nds32/nds32-intrinsic.cc: ...here.
	* config/nds32/nds32-isr.c: Moved to...
	* config/nds32/nds32-isr.cc: ...here.
	* config/nds32/nds32-md-auxiliary.c: Moved to...
	* config/nds32/nds32-md-auxiliary.cc: ...here.
	* config/nds32/nds32-memory-manipulation.c: Moved to...
	* config/nds32/nds32-memory-manipulation.cc: ...here.
	* config/nds32/nds32-pipelines-auxiliary.c: Moved to...
	* config/nds32/nds32-pipelines-auxiliary.cc: ...here.
	* config/nds32/nds32-predicates.c: Moved to...
	* config/nds32/nds32-predicates.cc: ...here.
	* config/nds32/nds32-relax-opt.c: Moved to...
	* config/nds32/nds32-relax-opt.cc: ...here.
	* config/nds32/nds32-utils.c: Moved to...
	* config/nds32/nds32-utils.cc: ...here.
	* config/nds32/nds32.c: Moved to...
	* config/nds32/nds32.cc: ...here.
	* config/netbsd-d.c: Moved to...
	* config/netbsd-d.cc: ...here.
	* config/netbsd.c: Moved to...
	* config/netbsd.cc: ...here.
	* config/nios2/nios2.c: Moved to...
	* config/nios2/nios2.cc: ...here.
	* config/nvptx/mkoffload.c: Moved to...
	* config/nvptx/mkoffload.cc: ...here.
	* config/nvptx/nvptx-c.c: Moved to...
	* config/nvptx/nvptx-c.cc: ...here.
	* config/nvptx/nvptx.c: Moved to...
	* config/nvptx/nvptx.cc: ...here.
	* config/openbsd-d.c: Moved to...
	* config/openbsd-d.cc: ...here.
	* config/or1k/or1k.c: Moved to...
	* config/or1k/or1k.cc: ...here.
	* config/pa/pa-d.c: Moved to...
	* config/pa/pa-d.cc: ...here.
	* config/pa/pa.c: Moved to...
	* config/pa/pa.cc: ...here.
	* config/pdp11/pdp11.c: Moved to...
	* config/pdp11/pdp11.cc: ...here.
	* config/pru/pru-passes.c: Moved to...
	* config/pru/pru-passes.cc: ...here.
	* config/pru/pru-pragma.c: Moved to...
	* config/pru/pru-pragma.cc: ...here.
	* config/pru/pru.c: Moved to...
	* config/pru/pru.cc: ...here.
	* config/riscv/riscv-builtins.c: Moved to...
	* config/riscv/riscv-builtins.cc: ...here.
	* config/riscv/riscv-c.c: Moved to...
	* config/riscv/riscv-c.cc: ...here.
	* config/riscv/riscv-d.c: Moved to...
	* config/riscv/riscv-d.cc: ...here.
	* config/riscv/riscv-shorten-memrefs.c: Moved to...
	* config/riscv/riscv-shorten-memrefs.cc: ...here.
	* config/riscv/riscv-sr.c: Moved to...
	* config/riscv/riscv-sr.cc: ...here.
	* config/riscv/riscv.c: Moved to...
	* config/riscv/riscv.cc: ...here.
	* config/rl78/rl78-c.c: Moved to...
	* config/rl78/rl78-c.cc: ...here.
	* config/rl78/rl78.c: Moved to...
	* config/rl78/rl78.cc: ...here.
	* config/rs6000/driver-rs6000.c: Moved to...
	* config/rs6000/driver-rs6000.cc: ...here.
	* config/rs6000/host-darwin.c: Moved to...
	* config/rs6000/host-darwin.cc: ...here.
	* config/rs6000/host-ppc64-darwin.c: Moved to...
	* config/rs6000/host-ppc64-darwin.cc: ...here.
	* config/rs6000/rbtree.c: Moved to...
	* config/rs6000/rbtree.cc: ...here.
	* config/rs6000/rs6000-c.c: Moved to...
	* config/rs6000/rs6000-c.cc: ...here.
	* config/rs6000/rs6000-call.c: Moved to...
	* config/rs6000/rs6000-call.cc: ...here.
	* config/rs6000/rs6000-d.c: Moved to...
	* config/rs6000/rs6000-d.cc: ...here.
	* config/rs6000/rs6000-gen-builtins.c: Moved to...
	* config/rs6000/rs6000-gen-builtins.cc: ...here.
	* config/rs6000/rs6000-linux.c: Moved to...
	* config/rs6000/rs6000-linux.cc: ...here.
	* config/rs6000/rs6000-logue.c: Moved to...
	* config/rs6000/rs6000-logue.cc: ...here.
	* config/rs6000/rs6000-p8swap.c: Moved to...
	* config/rs6000/rs6000-p8swap.cc: ...here.
	* config/rs6000/rs6000-pcrel-opt.c: Moved to...
	* config/rs6000/rs6000-pcrel-opt.cc: ...here.
	* config/rs6000/rs6000-string.c: Moved to...
	* config/rs6000/rs6000-string.cc: ...here.
	* config/rs6000/rs6000.c: Moved to...
	* config/rs6000/rs6000.cc: ...here.
	* config/rx/rx.c: Moved to...
	* config/rx/rx.cc: ...here.
	* config/s390/driver-native.c: Moved to...
	* config/s390/driver-native.cc: ...here.
	* config/s390/s390-c.c: Moved to...
	* config/s390/s390-c.cc: ...here.
	* config/s390/s390-d.c: Moved to...
	* config/s390/s390-d.cc: ...here.
	* config/s390/s390.c: Moved to...
	* config/s390/s390.cc: ...here.
	* config/sh/divtab-sh4-300.c: Moved to...
	* config/sh/divtab-sh4-300.cc: ...here.
	* config/sh/divtab-sh4.c: Moved to...
	* config/sh/divtab-sh4.cc: ...here.
	* config/sh/divtab.c: Moved to...
	* config/sh/divtab.cc: ...here.
	* config/sh/sh-c.c: Moved to...
	* config/sh/sh-c.cc: ...here.
	* config/sh/sh.c: Moved to...
	* config/sh/sh.cc: ...here.
	* config/sol2-c.c: Moved to...
	* config/sol2-c.cc: ...here.
	* config/sol2-cxx.c: Moved to...
	* config/sol2-cxx.cc: ...here.
	* config/sol2-d.c: Moved to...
	* config/sol2-d.cc: ...here.
	* config/sol2-stubs.c: Moved to...
	* config/sol2-stubs.cc: ...here.
	* config/sol2.c: Moved to...
	* config/sol2.cc: ...here.
	* config/sparc/driver-sparc.c: Moved to...
	* config/sparc/driver-sparc.cc: ...here.
	* config/sparc/sparc-c.c: Moved to...
	* config/sparc/sparc-c.cc: ...here.
	* config/sparc/sparc-d.c: Moved to...
	* config/sparc/sparc-d.cc: ...here.
	* config/sparc/sparc.c: Moved to...
	* config/sparc/sparc.cc: ...here.
	* config/stormy16/stormy16.c: Moved to...
	* config/stormy16/stormy16.cc: ...here.
	* config/tilegx/mul-tables.c: Moved to...
	* config/tilegx/mul-tables.cc: ...here.
	* config/tilegx/tilegx-c.c: Moved to...
	* config/tilegx/tilegx-c.cc: ...here.
	* config/tilegx/tilegx.c: Moved to...
	* config/tilegx/tilegx.cc: ...here.
	* config/tilepro/mul-tables.c: Moved to...
	* config/tilepro/mul-tables.cc: ...here.
	* config/tilepro/tilepro-c.c: Moved to...
	* config/tilepro/tilepro-c.cc: ...here.
	* config/tilepro/tilepro.c: Moved to...
	* config/tilepro/tilepro.cc: ...here.
	* config/v850/v850-c.c: Moved to...
	* config/v850/v850-c.cc: ...here.
	* config/v850/v850.c: Moved to...
	* config/v850/v850.cc: ...here.
	* config/vax/vax.c: Moved to...
	* config/vax/vax.cc: ...here.
	* config/visium/visium.c: Moved to...
	* config/visium/visium.cc: ...here.
	* config/vms/vms-c.c: Moved to...
	* config/vms/vms-c.cc: ...here.
	* config/vms/vms-f.c: Moved to...
	* config/vms/vms-f.cc: ...here.
	* config/vms/vms.c: Moved to...
	* config/vms/vms.cc: ...here.
	* config/vxworks-c.c: Moved to...
	* config/vxworks-c.cc: ...here.
	* config/vxworks.c: Moved to...
	* config/vxworks.cc: ...here.
	* config/winnt-c.c: Moved to...
	* config/winnt-c.cc: ...here.
	* config/xtensa/xtensa.c: Moved to...
	* config/xtensa/xtensa.cc: ...here.
	* context.c: Moved to...
	* context.cc: ...here.
	* convert.c: Moved to...
	* convert.cc: ...here.
	* coverage.c: Moved to...
	* coverage.cc: ...here.
	* cppbuiltin.c: Moved to...
	* cppbuiltin.cc: ...here.
	* cppdefault.c: Moved to...
	* cppdefault.cc: ...here.
	* cprop.c: Moved to...
	* cprop.cc: ...here.
	* cse.c: Moved to...
	* cse.cc: ...here.
	* cselib.c: Moved to...
	* cselib.cc: ...here.
	* ctfc.c: Moved to...
	* ctfc.cc: ...here.
	* ctfout.c: Moved to...
	* ctfout.cc: ...here.
	* data-streamer-in.c: Moved to...
	* data-streamer-in.cc: ...here.
	* data-streamer-out.c: Moved to...
	* data-streamer-out.cc: ...here.
	* data-streamer.c: Moved to...
	* data-streamer.cc: ...here.
	* dbgcnt.c: Moved to...
	* dbgcnt.cc: ...here.
	* dbxout.c: Moved to...
	* dbxout.cc: ...here.
	* dce.c: Moved to...
	* dce.cc: ...here.
	* ddg.c: Moved to...
	* ddg.cc: ...here.
	* debug.c: Moved to...
	* debug.cc: ...here.
	* df-core.c: Moved to...
	* df-core.cc: ...here.
	* df-problems.c: Moved to...
	* df-problems.cc: ...here.
	* df-scan.c: Moved to...
	* df-scan.cc: ...here.
	* dfp.c: Moved to...
	* dfp.cc: ...here.
	* diagnostic-color.c: Moved to...
	* diagnostic-color.cc: ...here.
	* diagnostic-show-locus.c: Moved to...
	* diagnostic-show-locus.cc: ...here.
	* diagnostic-spec.c: Moved to...
	* diagnostic-spec.cc: ...here.
	* diagnostic.c: Moved to...
	* diagnostic.cc: ...here.
	* dojump.c: Moved to...
	* dojump.cc: ...here.
	* dominance.c: Moved to...
	* dominance.cc: ...here.
	* domwalk.c: Moved to...
	* domwalk.cc: ...here.
	* double-int.c: Moved to...
	* double-int.cc: ...here.
	* dse.c: Moved to...
	* dse.cc: ...here.
	* dumpfile.c: Moved to...
	* dumpfile.cc: ...here.
	* dwarf2asm.c: Moved to...
	* dwarf2asm.cc: ...here.
	* dwarf2cfi.c: Moved to...
	* dwarf2cfi.cc: ...here.
	* dwarf2ctf.c: Moved to...
	* dwarf2ctf.cc: ...here.
	* dwarf2out.c: Moved to...
	* dwarf2out.cc: ...here.
	* early-remat.c: Moved to...
	* early-remat.cc: ...here.
	* edit-context.c: Moved to...
	* edit-context.cc: ...here.
	* emit-rtl.c: Moved to...
	* emit-rtl.cc: ...here.
	* errors.c: Moved to...
	* errors.cc: ...here.
	* et-forest.c: Moved to...
	* et-forest.cc: ...here.
	* except.c: Moved to...
	* except.cc: ...here.
	* explow.c: Moved to...
	* explow.cc: ...here.
	* expmed.c: Moved to...
	* expmed.cc: ...here.
	* expr.c: Moved to...
	* expr.cc: ...here.
	* fibonacci_heap.c: Moved to...
	* fibonacci_heap.cc: ...here.
	* file-find.c: Moved to...
	* file-find.cc: ...here.
	* file-prefix-map.c: Moved to...
	* file-prefix-map.cc: ...here.
	* final.c: Moved to...
	* final.cc: ...here.
	* fixed-value.c: Moved to...
	* fixed-value.cc: ...here.
	* fold-const-call.c: Moved to...
	* fold-const-call.cc: ...here.
	* fold-const.c: Moved to...
	* fold-const.cc: ...here.
	* fp-test.c: Moved to...
	* fp-test.cc: ...here.
	* function-tests.c: Moved to...
	* function-tests.cc: ...here.
	* function.c: Moved to...
	* function.cc: ...here.
	* fwprop.c: Moved to...
	* fwprop.cc: ...here.
	* gcc-ar.c: Moved to...
	* gcc-ar.cc: ...here.
	* gcc-main.c: Moved to...
	* gcc-main.cc: ...here.
	* gcc-rich-location.c: Moved to...
	* gcc-rich-location.cc: ...here.
	* gcc.c: Moved to...
	* gcc.cc: ...here.
	* gcov-dump.c: Moved to...
	* gcov-dump.cc: ...here.
	* gcov-io.c: Moved to...
	* gcov-io.cc: ...here.
	* gcov-tool.c: Moved to...
	* gcov-tool.cc: ...here.
	* gcov.c: Moved to...
	* gcov.cc: ...here.
	* gcse-common.c: Moved to...
	* gcse-common.cc: ...here.
	* gcse.c: Moved to...
	* gcse.cc: ...here.
	* genattr-common.c: Moved to...
	* genattr-common.cc: ...here.
	* genattr.c: Moved to...
	* genattr.cc: ...here.
	* genattrtab.c: Moved to...
	* genattrtab.cc: ...here.
	* genautomata.c: Moved to...
	* genautomata.cc: ...here.
	* gencfn-macros.c: Moved to...
	* gencfn-macros.cc: ...here.
	* gencheck.c: Moved to...
	* gencheck.cc: ...here.
	* genchecksum.c: Moved to...
	* genchecksum.cc: ...here.
	* gencodes.c: Moved to...
	* gencodes.cc: ...here.
	* genconditions.c: Moved to...
	* genconditions.cc: ...here.
	* genconfig.c: Moved to...
	* genconfig.cc: ...here.
	* genconstants.c: Moved to...
	* genconstants.cc: ...here.
	* genemit.c: Moved to...
	* genemit.cc: ...here.
	* genenums.c: Moved to...
	* genenums.cc: ...here.
	* generic-match-head.c: Moved to...
	* generic-match-head.cc: ...here.
	* genextract.c: Moved to...
	* genextract.cc: ...here.
	* genflags.c: Moved to...
	* genflags.cc: ...here.
	* gengenrtl.c: Moved to...
	* gengenrtl.cc: ...here.
	* gengtype-parse.c: Moved to...
	* gengtype-parse.cc: ...here.
	* gengtype-state.c: Moved to...
	* gengtype-state.cc: ...here.
	* gengtype.c: Moved to...
	* gengtype.cc: ...here.
	* genhooks.c: Moved to...
	* genhooks.cc: ...here.
	* genmatch.c: Moved to...
	* genmatch.cc: ...here.
	* genmddeps.c: Moved to...
	* genmddeps.cc: ...here.
	* genmddump.c: Moved to...
	* genmddump.cc: ...here.
	* genmodes.c: Moved to...
	* genmodes.cc: ...here.
	* genopinit.c: Moved to...
	* genopinit.cc: ...here.
	* genoutput.c: Moved to...
	* genoutput.cc: ...here.
	* genpeep.c: Moved to...
	* genpeep.cc: ...here.
	* genpreds.c: Moved to...
	* genpreds.cc: ...here.
	* genrecog.c: Moved to...
	* genrecog.cc: ...here.
	* gensupport.c: Moved to...
	* gensupport.cc: ...here.
	* gentarget-def.c: Moved to...
	* gentarget-def.cc: ...here.
	* genversion.c: Moved to...
	* genversion.cc: ...here.
	* ggc-common.c: Moved to...
	* ggc-common.cc: ...here.
	* ggc-none.c: Moved to...
	* ggc-none.cc: ...here.
	* ggc-page.c: Moved to...
	* ggc-page.cc: ...here.
	* ggc-tests.c: Moved to...
	* ggc-tests.cc: ...here.
	* gimple-builder.c: Moved to...
	* gimple-builder.cc: ...here.
	* gimple-expr.c: Moved to...
	* gimple-expr.cc: ...here.
	* gimple-fold.c: Moved to...
	* gimple-fold.cc: ...here.
	* gimple-iterator.c: Moved to...
	* gimple-iterator.cc: ...here.
	* gimple-laddress.c: Moved to...
	* gimple-laddress.cc: ...here.
	* gimple-loop-jam.c: Moved to...
	* gimple-loop-jam.cc: ...here.
	* gimple-low.c: Moved to...
	* gimple-low.cc: ...here.
	* gimple-match-head.c: Moved to...
	* gimple-match-head.cc: ...here.
	* gimple-pretty-print.c: Moved to...
	* gimple-pretty-print.cc: ...here.
	* gimple-ssa-backprop.c: Moved to...
	* gimple-ssa-backprop.cc: ...here.
	* gimple-ssa-evrp-analyze.c: Moved to...
	* gimple-ssa-evrp-analyze.cc: ...here.
	* gimple-ssa-evrp.c: Moved to...
	* gimple-ssa-evrp.cc: ...here.
	* gimple-ssa-isolate-paths.c: Moved to...
	* gimple-ssa-isolate-paths.cc: ...here.
	* gimple-ssa-nonnull-compare.c: Moved to...
	* gimple-ssa-nonnull-compare.cc: ...here.
	* gimple-ssa-split-paths.c: Moved to...
	* gimple-ssa-split-paths.cc: ...here.
	* gimple-ssa-sprintf.c: Moved to...
	* gimple-ssa-sprintf.cc: ...here.
	* gimple-ssa-store-merging.c: Moved to...
	* gimple-ssa-store-merging.cc: ...here.
	* gimple-ssa-strength-reduction.c: Moved to...
	* gimple-ssa-strength-reduction.cc: ...here.
	* gimple-ssa-warn-alloca.c: Moved to...
	* gimple-ssa-warn-alloca.cc: ...here.
	* gimple-ssa-warn-restrict.c: Moved to...
	* gimple-ssa-warn-restrict.cc: ...here.
	* gimple-streamer-in.c: Moved to...
	* gimple-streamer-in.cc: ...here.
	* gimple-streamer-out.c: Moved to...
	* gimple-streamer-out.cc: ...here.
	* gimple-walk.c: Moved to...
	* gimple-walk.cc: ...here.
	* gimple-warn-recursion.c: Moved to...
	* gimple-warn-recursion.cc: ...here.
	* gimple.c: Moved to...
	* gimple.cc: ...here.
	* gimplify-me.c: Moved to...
	* gimplify-me.cc: ...here.
	* gimplify.c: Moved to...
	* gimplify.cc: ...here.
	* godump.c: Moved to...
	* godump.cc: ...here.
	* graph.c: Moved to...
	* graph.cc: ...here.
	* graphds.c: Moved to...
	* graphds.cc: ...here.
	* graphite-dependences.c: Moved to...
	* graphite-dependences.cc: ...here.
	* graphite-isl-ast-to-gimple.c: Moved to...
	* graphite-isl-ast-to-gimple.cc: ...here.
	* graphite-optimize-isl.c: Moved to...
	* graphite-optimize-isl.cc: ...here.
	* graphite-poly.c: Moved to...
	* graphite-poly.cc: ...here.
	* graphite-scop-detection.c: Moved to...
	* graphite-scop-detection.cc: ...here.
	* graphite-sese-to-poly.c: Moved to...
	* graphite-sese-to-poly.cc: ...here.
	* graphite.c: Moved to...
	* graphite.cc: ...here.
	* haifa-sched.c: Moved to...
	* haifa-sched.cc: ...here.
	* hash-map-tests.c: Moved to...
	* hash-map-tests.cc: ...here.
	* hash-set-tests.c: Moved to...
	* hash-set-tests.cc: ...here.
	* hash-table.c: Moved to...
	* hash-table.cc: ...here.
	* hooks.c: Moved to...
	* hooks.cc: ...here.
	* host-default.c: Moved to...
	* host-default.cc: ...here.
	* hw-doloop.c: Moved to...
	* hw-doloop.cc: ...here.
	* hwint.c: Moved to...
	* hwint.cc: ...here.
	* ifcvt.c: Moved to...
	* ifcvt.cc: ...here.
	* inchash.c: Moved to...
	* inchash.cc: ...here.
	* incpath.c: Moved to...
	* incpath.cc: ...here.
	* init-regs.c: Moved to...
	* init-regs.cc: ...here.
	* input.c: Moved to...
	* input.cc: ...here.
	* internal-fn.c: Moved to...
	* internal-fn.cc: ...here.
	* intl.c: Moved to...
	* intl.cc: ...here.
	* ipa-comdats.c: Moved to...
	* ipa-comdats.cc: ...here.
	* ipa-cp.c: Moved to...
	* ipa-cp.cc: ...here.
	* ipa-devirt.c: Moved to...
	* ipa-devirt.cc: ...here.
	* ipa-fnsummary.c: Moved to...
	* ipa-fnsummary.cc: ...here.
	* ipa-icf-gimple.c: Moved to...
	* ipa-icf-gimple.cc: ...here.
	* ipa-icf.c: Moved to...
	* ipa-icf.cc: ...here.
	* ipa-inline-analysis.c: Moved to...
	* ipa-inline-analysis.cc: ...here.
	* ipa-inline-transform.c: Moved to...
	* ipa-inline-transform.cc: ...here.
	* ipa-inline.c: Moved to...
	* ipa-inline.cc: ...here.
	* ipa-modref-tree.c: Moved to...
	* ipa-modref-tree.cc: ...here.
	* ipa-modref.c: Moved to...
	* ipa-modref.cc: ...here.
	* ipa-param-manipulation.c: Moved to...
	* ipa-param-manipulation.cc: ...here.
	* ipa-polymorphic-call.c: Moved to...
	* ipa-polymorphic-call.cc: ...here.
	* ipa-predicate.c: Moved to...
	* ipa-predicate.cc: ...here.
	* ipa-profile.c: Moved to...
	* ipa-profile.cc: ...here.
	* ipa-prop.c: Moved to...
	* ipa-prop.cc: ...here.
	* ipa-pure-const.c: Moved to...
	* ipa-pure-const.cc: ...here.
	* ipa-ref.c: Moved to...
	* ipa-ref.cc: ...here.
	* ipa-reference.c: Moved to...
	* ipa-reference.cc: ...here.
	* ipa-split.c: Moved to...
	* ipa-split.cc: ...here.
	* ipa-sra.c: Moved to...
	* ipa-sra.cc: ...here.
	* ipa-utils.c: Moved to...
	* ipa-utils.cc: ...here.
	* ipa-visibility.c: Moved to...
	* ipa-visibility.cc: ...here.
	* ipa.c: Moved to...
	* ipa.cc: ...here.
	* ira-build.c: Moved to...
	* ira-build.cc: ...here.
	* ira-color.c: Moved to...
	* ira-color.cc: ...here.
	* ira-conflicts.c: Moved to...
	* ira-conflicts.cc: ...here.
	* ira-costs.c: Moved to...
	* ira-costs.cc: ...here.
	* ira-emit.c: Moved to...
	* ira-emit.cc: ...here.
	* ira-lives.c: Moved to...
	* ira-lives.cc: ...here.
	* ira.c: Moved to...
	* ira.cc: ...here.
	* jump.c: Moved to...
	* jump.cc: ...here.
	* langhooks.c: Moved to...
	* langhooks.cc: ...here.
	* lcm.c: Moved to...
	* lcm.cc: ...here.
	* lists.c: Moved to...
	* lists.cc: ...here.
	* loop-doloop.c: Moved to...
	* loop-doloop.cc: ...here.
	* loop-init.c: Moved to...
	* loop-init.cc: ...here.
	* loop-invariant.c: Moved to...
	* loop-invariant.cc: ...here.
	* loop-iv.c: Moved to...
	* loop-iv.cc: ...here.
	* loop-unroll.c: Moved to...
	* loop-unroll.cc: ...here.
	* lower-subreg.c: Moved to...
	* lower-subreg.cc: ...here.
	* lra-assigns.c: Moved to...
	* lra-assigns.cc: ...here.
	* lra-coalesce.c: Moved to...
	* lra-coalesce.cc: ...here.
	* lra-constraints.c: Moved to...
	* lra-constraints.cc: ...here.
	* lra-eliminations.c: Moved to...
	* lra-eliminations.cc: ...here.
	* lra-lives.c: Moved to...
	* lra-lives.cc: ...here.
	* lra-remat.c: Moved to...
	* lra-remat.cc: ...here.
	* lra-spills.c: Moved to...
	* lra-spills.cc: ...here.
	* lra.c: Moved to...
	* lra.cc: ...here.
	* lto-cgraph.c: Moved to...
	* lto-cgraph.cc: ...here.
	* lto-compress.c: Moved to...
	* lto-compress.cc: ...here.
	* lto-opts.c: Moved to...
	* lto-opts.cc: ...here.
	* lto-section-in.c: Moved to...
	* lto-section-in.cc: ...here.
	* lto-section-out.c: Moved to...
	* lto-section-out.cc: ...here.
	* lto-streamer-in.c: Moved to...
	* lto-streamer-in.cc: ...here.
	* lto-streamer-out.c: Moved to...
	* lto-streamer-out.cc: ...here.
	* lto-streamer.c: Moved to...
	* lto-streamer.cc: ...here.
	* lto-wrapper.c: Moved to...
	* lto-wrapper.cc: ...here.
	* main.c: Moved to...
	* main.cc: ...here.
	* mcf.c: Moved to...
	* mcf.cc: ...here.
	* mode-switching.c: Moved to...
	* mode-switching.cc: ...here.
	* modulo-sched.c: Moved to...
	* modulo-sched.cc: ...here.
	* multiple_target.c: Moved to...
	* multiple_target.cc: ...here.
	* omp-expand.c: Moved to...
	* omp-expand.cc: ...here.
	* omp-general.c: Moved to...
	* omp-general.cc: ...here.
	* omp-low.c: Moved to...
	* omp-low.cc: ...here.
	* omp-offload.c: Moved to...
	* omp-offload.cc: ...here.
	* omp-simd-clone.c: Moved to...
	* omp-simd-clone.cc: ...here.
	* opt-suggestions.c: Moved to...
	* opt-suggestions.cc: ...here.
	* optabs-libfuncs.c: Moved to...
	* optabs-libfuncs.cc: ...here.
	* optabs-query.c: Moved to...
	* optabs-query.cc: ...here.
	* optabs-tree.c: Moved to...
	* optabs-tree.cc: ...here.
	* optabs.c: Moved to...
	* optabs.cc: ...here.
	* opts-common.c: Moved to...
	* opts-common.cc: ...here.
	* opts-global.c: Moved to...
	* opts-global.cc: ...here.
	* opts.c: Moved to...
	* opts.cc: ...here.
	* passes.c: Moved to...
	* passes.cc: ...here.
	* plugin.c: Moved to...
	* plugin.cc: ...here.
	* postreload-gcse.c: Moved to...
	* postreload-gcse.cc: ...here.
	* postreload.c: Moved to...
	* postreload.cc: ...here.
	* predict.c: Moved to...
	* predict.cc: ...here.
	* prefix.c: Moved to...
	* prefix.cc: ...here.
	* pretty-print.c: Moved to...
	* pretty-print.cc: ...here.
	* print-rtl-function.c: Moved to...
	* print-rtl-function.cc: ...here.
	* print-rtl.c: Moved to...
	* print-rtl.cc: ...here.
	* print-tree.c: Moved to...
	* print-tree.cc: ...here.
	* profile-count.c: Moved to...
	* profile-count.cc: ...here.
	* profile.c: Moved to...
	* profile.cc: ...here.
	* read-md.c: Moved to...
	* read-md.cc: ...here.
	* read-rtl-function.c: Moved to...
	* read-rtl-function.cc: ...here.
	* read-rtl.c: Moved to...
	* read-rtl.cc: ...here.
	* real.c: Moved to...
	* real.cc: ...here.
	* realmpfr.c: Moved to...
	* realmpfr.cc: ...here.
	* recog.c: Moved to...
	* recog.cc: ...here.
	* ree.c: Moved to...
	* ree.cc: ...here.
	* reg-stack.c: Moved to...
	* reg-stack.cc: ...here.
	* regcprop.c: Moved to...
	* regcprop.cc: ...here.
	* reginfo.c: Moved to...
	* reginfo.cc: ...here.
	* regrename.c: Moved to...
	* regrename.cc: ...here.
	* regstat.c: Moved to...
	* regstat.cc: ...here.
	* reload.c: Moved to...
	* reload.cc: ...here.
	* reload1.c: Moved to...
	* reload1.cc: ...here.
	* reorg.c: Moved to...
	* reorg.cc: ...here.
	* resource.c: Moved to...
	* resource.cc: ...here.
	* rtl-error.c: Moved to...
	* rtl-error.cc: ...here.
	* rtl-tests.c: Moved to...
	* rtl-tests.cc: ...here.
	* rtl.c: Moved to...
	* rtl.cc: ...here.
	* rtlanal.c: Moved to...
	* rtlanal.cc: ...here.
	* rtlhash.c: Moved to...
	* rtlhash.cc: ...here.
	* rtlhooks.c: Moved to...
	* rtlhooks.cc: ...here.
	* rtx-vector-builder.c: Moved to...
	* rtx-vector-builder.cc: ...here.
	* run-rtl-passes.c: Moved to...
	* run-rtl-passes.cc: ...here.
	* sancov.c: Moved to...
	* sancov.cc: ...here.
	* sanopt.c: Moved to...
	* sanopt.cc: ...here.
	* sbitmap.c: Moved to...
	* sbitmap.cc: ...here.
	* sched-deps.c: Moved to...
	* sched-deps.cc: ...here.
	* sched-ebb.c: Moved to...
	* sched-ebb.cc: ...here.
	* sched-rgn.c: Moved to...
	* sched-rgn.cc: ...here.
	* sel-sched-dump.c: Moved to...
	* sel-sched-dump.cc: ...here.
	* sel-sched-ir.c: Moved to...
	* sel-sched-ir.cc: ...here.
	* sel-sched.c: Moved to...
	* sel-sched.cc: ...here.
	* selftest-diagnostic.c: Moved to...
	* selftest-diagnostic.cc: ...here.
	* selftest-rtl.c: Moved to...
	* selftest-rtl.cc: ...here.
	* selftest-run-tests.c: Moved to...
	* selftest-run-tests.cc: ...here.
	* selftest.c: Moved to...
	* selftest.cc: ...here.
	* sese.c: Moved to...
	* sese.cc: ...here.
	* shrink-wrap.c: Moved to...
	* shrink-wrap.cc: ...here.
	* simplify-rtx.c: Moved to...
	* simplify-rtx.cc: ...here.
	* sparseset.c: Moved to...
	* sparseset.cc: ...here.
	* spellcheck-tree.c: Moved to...
	* spellcheck-tree.cc: ...here.
	* spellcheck.c: Moved to...
	* spellcheck.cc: ...here.
	* sreal.c: Moved to...
	* sreal.cc: ...here.
	* stack-ptr-mod.c: Moved to...
	* stack-ptr-mod.cc: ...here.
	* statistics.c: Moved to...
	* statistics.cc: ...here.
	* stmt.c: Moved to...
	* stmt.cc: ...here.
	* stor-layout.c: Moved to...
	* stor-layout.cc: ...here.
	* store-motion.c: Moved to...
	* store-motion.cc: ...here.
	* streamer-hooks.c: Moved to...
	* streamer-hooks.cc: ...here.
	* stringpool.c: Moved to...
	* stringpool.cc: ...here.
	* substring-locations.c: Moved to...
	* substring-locations.cc: ...here.
	* symtab.c: Moved to...
	* symtab.cc: ...here.
	* target-globals.c: Moved to...
	* target-globals.cc: ...here.
	* targhooks.c: Moved to...
	* targhooks.cc: ...here.
	* timevar.c: Moved to...
	* timevar.cc: ...here.
	* toplev.c: Moved to...
	* toplev.cc: ...here.
	* tracer.c: Moved to...
	* tracer.cc: ...here.
	* trans-mem.c: Moved to...
	* trans-mem.cc: ...here.
	* tree-affine.c: Moved to...
	* tree-affine.cc: ...here.
	* tree-call-cdce.c: Moved to...
	* tree-call-cdce.cc: ...here.
	* tree-cfg.c: Moved to...
	* tree-cfg.cc: ...here.
	* tree-cfgcleanup.c: Moved to...
	* tree-cfgcleanup.cc: ...here.
	* tree-chrec.c: Moved to...
	* tree-chrec.cc: ...here.
	* tree-complex.c: Moved to...
	* tree-complex.cc: ...here.
	* tree-data-ref.c: Moved to...
	* tree-data-ref.cc: ...here.
	* tree-dfa.c: Moved to...
	* tree-dfa.cc: ...here.
	* tree-diagnostic.c: Moved to...
	* tree-diagnostic.cc: ...here.
	* tree-dump.c: Moved to...
	* tree-dump.cc: ...here.
	* tree-eh.c: Moved to...
	* tree-eh.cc: ...here.
	* tree-emutls.c: Moved to...
	* tree-emutls.cc: ...here.
	* tree-if-conv.c: Moved to...
	* tree-if-conv.cc: ...here.
	* tree-inline.c: Moved to...
	* tree-inline.cc: ...here.
	* tree-into-ssa.c: Moved to...
	* tree-into-ssa.cc: ...here.
	* tree-iterator.c: Moved to...
	* tree-iterator.cc: ...here.
	* tree-loop-distribution.c: Moved to...
	* tree-loop-distribution.cc: ...here.
	* tree-nested.c: Moved to...
	* tree-nested.cc: ...here.
	* tree-nrv.c: Moved to...
	* tree-nrv.cc: ...here.
	* tree-object-size.c: Moved to...
	* tree-object-size.cc: ...here.
	* tree-outof-ssa.c: Moved to...
	* tree-outof-ssa.cc: ...here.
	* tree-parloops.c: Moved to...
	* tree-parloops.cc: ...here.
	* tree-phinodes.c: Moved to...
	* tree-phinodes.cc: ...here.
	* tree-predcom.c: Moved to...
	* tree-predcom.cc: ...here.
	* tree-pretty-print.c: Moved to...
	* tree-pretty-print.cc: ...here.
	* tree-profile.c: Moved to...
	* tree-profile.cc: ...here.
	* tree-scalar-evolution.c: Moved to...
	* tree-scalar-evolution.cc: ...here.
	* tree-sra.c: Moved to...
	* tree-sra.cc: ...here.
	* tree-ssa-address.c: Moved to...
	* tree-ssa-address.cc: ...here.
	* tree-ssa-alias.c: Moved to...
	* tree-ssa-alias.cc: ...here.
	* tree-ssa-ccp.c: Moved to...
	* tree-ssa-ccp.cc: ...here.
	* tree-ssa-coalesce.c: Moved to...
	* tree-ssa-coalesce.cc: ...here.
	* tree-ssa-copy.c: Moved to...
	* tree-ssa-copy.cc: ...here.
	* tree-ssa-dce.c: Moved to...
	* tree-ssa-dce.cc: ...here.
	* tree-ssa-dom.c: Moved to...
	* tree-ssa-dom.cc: ...here.
	* tree-ssa-dse.c: Moved to...
	* tree-ssa-dse.cc: ...here.
	* tree-ssa-forwprop.c: Moved to...
	* tree-ssa-forwprop.cc: ...here.
	* tree-ssa-ifcombine.c: Moved to...
	* tree-ssa-ifcombine.cc: ...here.
	* tree-ssa-live.c: Moved to...
	* tree-ssa-live.cc: ...here.
	* tree-ssa-loop-ch.c: Moved to...
	* tree-ssa-loop-ch.cc: ...here.
	* tree-ssa-loop-im.c: Moved to...
	* tree-ssa-loop-im.cc: ...here.
	* tree-ssa-loop-ivcanon.c: Moved to...
	* tree-ssa-loop-ivcanon.cc: ...here.
	* tree-ssa-loop-ivopts.c: Moved to...
	* tree-ssa-loop-ivopts.cc: ...here.
	* tree-ssa-loop-manip.c: Moved to...
	* tree-ssa-loop-manip.cc: ...here.
	* tree-ssa-loop-niter.c: Moved to...
	* tree-ssa-loop-niter.cc: ...here.
	* tree-ssa-loop-prefetch.c: Moved to...
	* tree-ssa-loop-prefetch.cc: ...here.
	* tree-ssa-loop-split.c: Moved to...
	* tree-ssa-loop-split.cc: ...here.
	* tree-ssa-loop-unswitch.c: Moved to...
	* tree-ssa-loop-unswitch.cc: ...here.
	* tree-ssa-loop.c: Moved to...
	* tree-ssa-loop.cc: ...here.
	* tree-ssa-math-opts.c: Moved to...
	* tree-ssa-math-opts.cc: ...here.
	* tree-ssa-operands.c: Moved to...
	* tree-ssa-operands.cc: ...here.
	* tree-ssa-phiopt.c: Moved to...
	* tree-ssa-phiopt.cc: ...here.
	* tree-ssa-phiprop.c: Moved to...
	* tree-ssa-phiprop.cc: ...here.
	* tree-ssa-pre.c: Moved to...
	* tree-ssa-pre.cc: ...here.
	* tree-ssa-propagate.c: Moved to...
	* tree-ssa-propagate.cc: ...here.
	* tree-ssa-reassoc.c: Moved to...
	* tree-ssa-reassoc.cc: ...here.
	* tree-ssa-sccvn.c: Moved to...
	* tree-ssa-sccvn.cc: ...here.
	* tree-ssa-scopedtables.c: Moved to...
	* tree-ssa-scopedtables.cc: ...here.
	* tree-ssa-sink.c: Moved to...
	* tree-ssa-sink.cc: ...here.
	* tree-ssa-strlen.c: Moved to...
	* tree-ssa-strlen.cc: ...here.
	* tree-ssa-structalias.c: Moved to...
	* tree-ssa-structalias.cc: ...here.
	* tree-ssa-tail-merge.c: Moved to...
	* tree-ssa-tail-merge.cc: ...here.
	* tree-ssa-ter.c: Moved to...
	* tree-ssa-ter.cc: ...here.
	* tree-ssa-threadbackward.c: Moved to...
	* tree-ssa-threadbackward.cc: ...here.
	* tree-ssa-threadedge.c: Moved to...
	* tree-ssa-threadedge.cc: ...here.
	* tree-ssa-threadupdate.c: Moved to...
	* tree-ssa-threadupdate.cc: ...here.
	* tree-ssa-uncprop.c: Moved to...
	* tree-ssa-uncprop.cc: ...here.
	* tree-ssa-uninit.c: Moved to...
	* tree-ssa-uninit.cc: ...here.
	* tree-ssa.c: Moved to...
	* tree-ssa.cc: ...here.
	* tree-ssanames.c: Moved to...
	* tree-ssanames.cc: ...here.
	* tree-stdarg.c: Moved to...
	* tree-stdarg.cc: ...here.
	* tree-streamer-in.c: Moved to...
	* tree-streamer-in.cc: ...here.
	* tree-streamer-out.c: Moved to...
	* tree-streamer-out.cc: ...here.
	* tree-streamer.c: Moved to...
	* tree-streamer.cc: ...here.
	* tree-switch-conversion.c: Moved to...
	* tree-switch-conversion.cc: ...here.
	* tree-tailcall.c: Moved to...
	* tree-tailcall.cc: ...here.
	* tree-vect-data-refs.c: Moved to...
	* tree-vect-data-refs.cc: ...here.
	* tree-vect-generic.c: Moved to...
	* tree-vect-generic.cc: ...here.
	* tree-vect-loop-manip.c: Moved to...
	* tree-vect-loop-manip.cc: ...here.
	* tree-vect-loop.c: Moved to...
	* tree-vect-loop.cc: ...here.
	* tree-vect-patterns.c: Moved to...
	* tree-vect-patterns.cc: ...here.
	* tree-vect-slp-patterns.c: Moved to...
	* tree-vect-slp-patterns.cc: ...here.
	* tree-vect-slp.c: Moved to...
	* tree-vect-slp.cc: ...here.
	* tree-vect-stmts.c: Moved to...
	* tree-vect-stmts.cc: ...here.
	* tree-vector-builder.c: Moved to...
	* tree-vector-builder.cc: ...here.
	* tree-vectorizer.c: Moved to...
	* tree-vectorizer.cc: ...here.
	* tree-vrp.c: Moved to...
	* tree-vrp.cc: ...here.
	* tree.c: Moved to...
	* tree.cc: ...here.
	* tsan.c: Moved to...
	* tsan.cc: ...here.
	* typed-splay-tree.c: Moved to...
	* typed-splay-tree.cc: ...here.
	* ubsan.c: Moved to...
	* ubsan.cc: ...here.
	* valtrack.c: Moved to...
	* valtrack.cc: ...here.
	* value-prof.c: Moved to...
	* value-prof.cc: ...here.
	* var-tracking.c: Moved to...
	* var-tracking.cc: ...here.
	* varasm.c: Moved to...
	* varasm.cc: ...here.
	* varpool.c: Moved to...
	* varpool.cc: ...here.
	* vec-perm-indices.c: Moved to...
	* vec-perm-indices.cc: ...here.
	* vec.c: Moved to...
	* vec.cc: ...here.
	* vmsdbgout.c: Moved to...
	* vmsdbgout.cc: ...here.
	* vr-values.c: Moved to...
	* vr-values.cc: ...here.
	* vtable-verify.c: Moved to...
	* vtable-verify.cc: ...here.
	* web.c: Moved to...
	* web.cc: ...here.
	* xcoffout.c: Moved to...
	* xcoffout.cc: ...here.

gcc/c-family/ChangeLog:

	* c-ada-spec.c: Moved to...
	* c-ada-spec.cc: ...here.
	* c-attribs.c: Moved to...
	* c-attribs.cc: ...here.
	* c-common.c: Moved to...
	* c-common.cc: ...here.
	* c-cppbuiltin.c: Moved to...
	* c-cppbuiltin.cc: ...here.
	* c-dump.c: Moved to...
	* c-dump.cc: ...here.
	* c-format.c: Moved to...
	* c-format.cc: ...here.
	* c-gimplify.c: Moved to...
	* c-gimplify.cc: ...here.
	* c-indentation.c: Moved to...
	* c-indentation.cc: ...here.
	* c-lex.c: Moved to...
	* c-lex.cc: ...here.
	* c-omp.c: Moved to...
	* c-omp.cc: ...here.
	* c-opts.c: Moved to...
	* c-opts.cc: ...here.
	* c-pch.c: Moved to...
	* c-pch.cc: ...here.
	* c-ppoutput.c: Moved to...
	* c-ppoutput.cc: ...here.
	* c-pragma.c: Moved to...
	* c-pragma.cc: ...here.
	* c-pretty-print.c: Moved to...
	* c-pretty-print.cc: ...here.
	* c-semantics.c: Moved to...
	* c-semantics.cc: ...here.
	* c-ubsan.c: Moved to...
	* c-ubsan.cc: ...here.
	* c-warn.c: Moved to...
	* c-warn.cc: ...here.
	* cppspec.c: Moved to...
	* cppspec.cc: ...here.
	* stub-objc.c: Moved to...
	* stub-objc.cc: ...here.

gcc/c/ChangeLog:

	* c-aux-info.c: Moved to...
	* c-aux-info.cc: ...here.
	* c-convert.c: Moved to...
	* c-convert.cc: ...here.
	* c-decl.c: Moved to...
	* c-decl.cc: ...here.
	* c-errors.c: Moved to...
	* c-errors.cc: ...here.
	* c-fold.c: Moved to...
	* c-fold.cc: ...here.
	* c-lang.c: Moved to...
	* c-lang.cc: ...here.
	* c-objc-common.c: Moved to...
	* c-objc-common.cc: ...here.
	* c-parser.c: Moved to...
	* c-parser.cc: ...here.
	* c-typeck.c: Moved to...
	* c-typeck.cc: ...here.
	* gccspec.c: Moved to...
	* gccspec.cc: ...here.
	* gimple-parser.c: Moved to...
	* gimple-parser.cc: ...here.

gcc/cp/ChangeLog:

	* call.c: Moved to...
	* call.cc: ...here.
	* class.c: Moved to...
	* class.cc: ...here.
	* constexpr.c: Moved to...
	* constexpr.cc: ...here.
	* cp-gimplify.c: Moved to...
	* cp-gimplify.cc: ...here.
	* cp-lang.c: Moved to...
	* cp-lang.cc: ...here.
	* cp-objcp-common.c: Moved to...
	* cp-objcp-common.cc: ...here.
	* cp-ubsan.c: Moved to...
	* cp-ubsan.cc: ...here.
	* cvt.c: Moved to...
	* cvt.cc: ...here.
	* cxx-pretty-print.c: Moved to...
	* cxx-pretty-print.cc: ...here.
	* decl.c: Moved to...
	* decl.cc: ...here.
	* decl2.c: Moved to...
	* decl2.cc: ...here.
	* dump.c: Moved to...
	* dump.cc: ...here.
	* error.c: Moved to...
	* error.cc: ...here.
	* except.c: Moved to...
	* except.cc: ...here.
	* expr.c: Moved to...
	* expr.cc: ...here.
	* friend.c: Moved to...
	* friend.cc: ...here.
	* g++spec.c: Moved to...
	* g++spec.cc: ...here.
	* init.c: Moved to...
	* init.cc: ...here.
	* lambda.c: Moved to...
	* lambda.cc: ...here.
	* lex.c: Moved to...
	* lex.cc: ...here.
	* mangle.c: Moved to...
	* mangle.cc: ...here.
	* method.c: Moved to...
	* method.cc: ...here.
	* name-lookup.c: Moved to...
	* name-lookup.cc: ...here.
	* optimize.c: Moved to...
	* optimize.cc: ...here.
	* parser.c: Moved to...
	* parser.cc: ...here.
	* pt.c: Moved to...
	* pt.cc: ...here.
	* ptree.c: Moved to...
	* ptree.cc: ...here.
	* rtti.c: Moved to...
	* rtti.cc: ...here.
	* search.c: Moved to...
	* search.cc: ...here.
	* semantics.c: Moved to...
	* semantics.cc: ...here.
	* tree.c: Moved to...
	* tree.cc: ...here.
	* typeck.c: Moved to...
	* typeck.cc: ...here.
	* typeck2.c: Moved to...
	* typeck2.cc: ...here.
	* vtable-class-hierarchy.c: Moved to...
	* vtable-class-hierarchy.cc: ...here.

gcc/fortran/ChangeLog:

	* arith.c: Moved to...
	* arith.cc: ...here.
	* array.c: Moved to...
	* array.cc: ...here.
	* bbt.c: Moved to...
	* bbt.cc: ...here.
	* check.c: Moved to...
	* check.cc: ...here.
	* class.c: Moved to...
	* class.cc: ...here.
	* constructor.c: Moved to...
	* constructor.cc: ...here.
	* convert.c: Moved to...
	* convert.cc: ...here.
	* cpp.c: Moved to...
	* cpp.cc: ...here.
	* data.c: Moved to...
	* data.cc: ...here.
	* decl.c: Moved to...
	* decl.cc: ...here.
	* dependency.c: Moved to...
	* dependency.cc: ...here.
	* dump-parse-tree.c: Moved to...
	* dump-parse-tree.cc: ...here.
	* error.c: Moved to...
	* error.cc: ...here.
	* expr.c: Moved to...
	* expr.cc: ...here.
	* f95-lang.c: Moved to...
	* f95-lang.cc: ...here.
	* frontend-passes.c: Moved to...
	* frontend-passes.cc: ...here.
	* gfortranspec.c: Moved to...
	* gfortranspec.cc: ...here.
	* interface.c: Moved to...
	* interface.cc: ...here.
	* intrinsic.c: Moved to...
	* intrinsic.cc: ...here.
	* io.c: Moved to...
	* io.cc: ...here.
	* iresolve.c: Moved to...
	* iresolve.cc: ...here.
	* match.c: Moved to...
	* match.cc: ...here.
	* matchexp.c: Moved to...
	* matchexp.cc: ...here.
	* misc.c: Moved to...
	* misc.cc: ...here.
	* module.c: Moved to...
	* module.cc: ...here.
	* openmp.c: Moved to...
	* openmp.cc: ...here.
	* options.c: Moved to...
	* options.cc: ...here.
	* parse.c: Moved to...
	* parse.cc: ...here.
	* primary.c: Moved to...
	* primary.cc: ...here.
	* resolve.c: Moved to...
	* resolve.cc: ...here.
	* scanner.c: Moved to...
	* scanner.cc: ...here.
	* simplify.c: Moved to...
	* simplify.cc: ...here.
	* st.c: Moved to...
	* st.cc: ...here.
	* symbol.c: Moved to...
	* symbol.cc: ...here.
	* target-memory.c: Moved to...
	* target-memory.cc: ...here.
	* trans-array.c: Moved to...
	* trans-array.cc: ...here.
	* trans-common.c: Moved to...
	* trans-common.cc: ...here.
	* trans-const.c: Moved to...
	* trans-const.cc: ...here.
	* trans-decl.c: Moved to...
	* trans-decl.cc: ...here.
	* trans-expr.c: Moved to...
	* trans-expr.cc: ...here.
	* trans-intrinsic.c: Moved to...
	* trans-intrinsic.cc: ...here.
	* trans-io.c: Moved to...
	* trans-io.cc: ...here.
	* trans-openmp.c: Moved to...
	* trans-openmp.cc: ...here.
	* trans-stmt.c: Moved to...
	* trans-stmt.cc: ...here.
	* trans-types.c: Moved to...
	* trans-types.cc: ...here.
	* trans.c: Moved to...
	* trans.cc: ...here.

gcc/go/ChangeLog:

	* go-backend.c: Moved to...
	* go-backend.cc: ...here.
	* go-lang.c: Moved to...
	* go-lang.cc: ...here.
	* gospec.c: Moved to...
	* gospec.cc: ...here.

gcc/jit/ChangeLog:

	* dummy-frontend.c: Moved to...
	* dummy-frontend.cc: ...here.
	* jit-builtins.c: Moved to...
	* jit-builtins.cc: ...here.
	* jit-logging.c: Moved to...
	* jit-logging.cc: ...here.
	* jit-playback.c: Moved to...
	* jit-playback.cc: ...here.
	* jit-recording.c: Moved to...
	* jit-recording.cc: ...here.
	* jit-result.c: Moved to...
	* jit-result.cc: ...here.
	* jit-spec.c: Moved to...
	* jit-spec.cc: ...here.
	* jit-tempdir.c: Moved to...
	* jit-tempdir.cc: ...here.
	* jit-w32.c: Moved to...
	* jit-w32.cc: ...here.
	* libgccjit.c: Moved to...
	* libgccjit.cc: ...here.

gcc/lto/ChangeLog:

	* common.c: Moved to...
	* common.cc: ...here.
	* lto-common.c: Moved to...
	* lto-common.cc: ...here.
	* lto-dump.c: Moved to...
	* lto-dump.cc: ...here.
	* lto-lang.c: Moved to...
	* lto-lang.cc: ...here.
	* lto-object.c: Moved to...
	* lto-object.cc: ...here.
	* lto-partition.c: Moved to...
	* lto-partition.cc: ...here.
	* lto-symtab.c: Moved to...
	* lto-symtab.cc: ...here.
	* lto.c: Moved to...
	* lto.cc: ...here.

gcc/objc/ChangeLog:

	* objc-act.c: Moved to...
	* objc-act.cc: ...here.
	* objc-encoding.c: Moved to...
	* objc-encoding.cc: ...here.
	* objc-gnu-runtime-abi-01.c: Moved to...
	* objc-gnu-runtime-abi-01.cc: ...here.
	* objc-lang.c: Moved to...
	* objc-lang.cc: ...here.
	* objc-map.c: Moved to...
	* objc-map.cc: ...here.
	* objc-next-runtime-abi-01.c: Moved to...
	* objc-next-runtime-abi-01.cc: ...here.
	* objc-next-runtime-abi-02.c: Moved to...
	* objc-next-runtime-abi-02.cc: ...here.
	* objc-runtime-shared-support.c: Moved to...
	* objc-runtime-shared-support.cc: ...here.

gcc/objcp/ChangeLog:

	* objcp-decl.c: Moved to...
	* objcp-decl.cc: ...here.
	* objcp-lang.c: Moved to...
	* objcp-lang.cc: ...here.

libcpp/ChangeLog:

	* charset.c: Moved to...
	* charset.cc: ...here.
	* directives.c: Moved to...
	* directives.cc: ...here.
	* errors.c: Moved to...
	* errors.cc: ...here.
	* expr.c: Moved to...
	* expr.cc: ...here.
	* files.c: Moved to...
	* files.cc: ...here.
	* identifiers.c: Moved to...
	* identifiers.cc: ...here.
	* init.c: Moved to...
	* init.cc: ...here.
	* lex.c: Moved to...
	* lex.cc: ...here.
	* line-map.c: Moved to...
	* line-map.cc: ...here.
	* macro.c: Moved to...
	* macro.cc: ...here.
	* makeucnid.c: Moved to...
	* makeucnid.cc: ...here.
	* mkdeps.c: Moved to...
	* mkdeps.cc: ...here.
	* pch.c: Moved to...
	* pch.cc: ...here.
	* symtab.c: Moved to...
	* symtab.cc: ...here.
	* traditional.c: Moved to...
	* traditional.cc: ...here.

When the preprocessor lexes preprocessing numbers in lex_number, it
accepts digit separators in more cases than actually permitted in
pp-numbers by the standard syntax.

One thing this accepts is adjacent digit separators; there is some
code to reject those later, but as noted in bug 83873 it fails to
cover the case of adjacent digit separators within a floating-point
exponent.  Accepting adjacent digit separators only results in a
missing diagnostic, not in valid code being rejected or being accepted
with incorrect semantics, because the correct lexing in such a case
would have '' start the following preprocessing tokens, and no valid
preprocessing token starts '' while ' isn't valid on its own as a
preprocessing token either.  So this patch fixes that case by moving
the error for adjacent digit separators to lex_number (allowing a more
specific diagnostic than if '' were excluded from the pp-number
completely).

Other cases inappropriately accepted involve digit separators before
'.', 'e+', 'e-', 'p+' or 'p-' (or corresponding uppercase variants).
In those cases, as shown by the test digit-sep-pp-number.C added, this
can result in valid code being wrongly rejected as a result of too
many characters being included in the pp-number.  So this case is
fixed by terminating the pp-number at the correct character according
to the standard.  That test also covers the case where a digit
separator was followed by an identifier-nondigit that is not a
nondigit (e.g. a UCN); that case was already handled correctly.

Bootstrapped with no regressions for x86_64-pc-linux-gnu.

libcpp/
	PR c++/83873
	PR preprocessor/97604
	* lex.c (lex_number): Reject adjacent digit separators here.  Do
	not allow digit separators before '.' or an exponent with sign.
	* expr.c (cpp_classify_number): Do not check for adjacent digit
	separators here.

gcc/testsuite/
	PR c++/83873
	PR preprocessor/97604
	* g++.dg/cpp1y/digit-sep-neg-2.C,
	g++.dg/cpp1y/digit-sep-pp-number.C: New tests.
	* g++.dg/cpp1y/digit-sep-line-neg.C, g++.dg/cpp1y/digit-sep-neg.C:
	Adjust expected messages.

The following patch uses make_signed_t<size_t> instead of
make_signed<size_t>::type in the diagnostics, because the former is shorter.
It is true that one can't use make_signed<size_t>::type in C++11 code (which
is why I haven't changed it in the testcase which is c++11 effective
target), but the message talks about C++23 and make_signed_t is a C++14 and
later feature, so I think it is fine.

2021-02-04  Jakub Jelinek  <jakub@redhat.com>

	* expr.c (cpp_classify_number): Use make_signed_t<size_t> instead of
	make_signed<size_t>::type in the diagnostics.

	* g++.dg/warn/Wsize_t-literals.C: Expect make_signed_t<size_t> instead
	of make_signed<size_t>::type in the diagnostics.

Integer literal suffixes for signed size ('z') and unsigned size
(some permutation od 'zu') are provided as a language addition.

gcc/c-family/ChangeLog:

	* c-cppbuiltin.c (c_cpp_builtins): Define __cpp_size_t_suffix.
	* c-lex.c (interpret_integer): Set node type for size literal.

libcpp/ChangeLog:

	* expr.c (interpret_int_suffix): Detect 'z' integer suffix.
	(cpp_classify_number): Compat warning for use of 'z' suffix.
	* include/cpplib.h (struct cpp_options): New flag.
	(enum cpp_warning_reason): New flag.
	(CPP_N_USERDEF): Comment C++0x -> C++11.
	(CPP_N_SIZE_T): New flag for cpp_classify_number.
	* init.c (cpp_set_lang): Initialize new flag.

gcc/testsuite/ChangeLog:

	* g++.dg/cpp0x/udlit-shadow-neg.C: Test for 'z' and 'zu' shadowing.
	* g++.dg/cpp23/feat-cxx2b.C: New test.
	* g++.dg/cpp23/size_t-literals.C: New test.
	* g++.dg/warn/Wsize_t-literals.C: New test.

Deferred macros are needed for C++ modules.  Header units may export
macro definitions and undefinitions.  These are resolved lazily at the
point of (potential) use.  (The language specifies that, it's not just
a useful optimization.)  Thus, identifier nodes grow a 'deferred'
field, which fortunately doesn't expand the structure on 64-bit
systems as there was padding there.  This is non-zero on NT_MACRO
nodes, if the macro is deferred.  When such an identifier is lexed, it
is resolved via a callback that I added recently.  That will either
provide the macro definition, or discover it there was an overriding
undef.  Either way the identifier is no longer a deferred macro.
Notice it is now possible for NT_MACRO nodes to have a NULL macro
expansion.

	libcpp/
	* include/cpplib.h (struct cpp_hashnode): Add deferred field.
	(cpp_set_deferred_macro): Define.
	(cpp_get_deferred_macro): Declare.
	(cpp_macro_definition): Reformat, add overload.
	(cpp_macro_definition_location): Deal with deferred macro.
	(cpp_alloc_token_string, cpp_compare_macro): Declare.
	* internal.h (_cpp_notify_macro_use): Return bool
	(_cpp_maybe_notify_macro_use): Likewise.
	* directives.c (do_undef): Check macro is not undef before
	warning.
	(do_ifdef, do_ifndef): Deal with deferred macro.
	* expr.c (parse_defined): Likewise.
	* lex.c (cpp_allocate_token_string): Break out of ...
	(create_literal): ... here.  Call it.
	(cpp_maybe_module_directive): Deal with deferred macro.
	* macro.c (cpp_get_token_1): Deal with deferred macro.
	(warn_of_redefinition): Deal with deferred macro.
	(compare_macros): Rename to ...
	(cpp_compare_macro): ... here.  Make extern.
	(cpp_get_deferred_macro): New.
	(_cpp_notify_macro_use): Deal with deferred macro, return bool
	indicating definedness.
	(cpp_macro_definition): Deal with deferred macro.

C2x adds binary integer constants (approved at the last WG14 meeting,
though not yet added to the working draft in git).  Configure libcpp
to consider these a standard feature in C2x mode, with appropriate
updates to diagnostics including support for diagnosing them with
-std=c2x -Wc11-c2x-compat.

Bootstrapped with no regressions for x86_64-pc-linux-gnu.

gcc/testsuite/
2020-11-13  Joseph Myers  <joseph@codesourcery.com>

	* gcc.dg/binary-constants-2.c, gcc.dg/binary-constants-3.c,
	gcc.dg/system-binary-constants-1.c: Update expected diagnostics.
	* gcc.dg/c11-binary-constants-1.c,
	gcc.dg/c11-binary-constants-2.c, gcc.dg/c2x-binary-constants-1.c,
	gcc.dg/c2x-binary-constants-2.c, gcc.dg/c2x-binary-constants-3.c:
	New tests.

libcpp/
2020-11-13  Joseph Myers  <joseph@codesourcery.com>

	* expr.c (cpp_classify_number): Update diagnostic for binary
	constants for C.  Also diagnose binary constants for
	-Wc11-c2x-compat.
	* init.c (lang_defaults): Enable binary constants for GNUC2X and
	STDC2X.

Our macro use hook passes a location, but doesn't recieve it from the
using location.  This patch adds the extra location_t parameter and
passes it though.

A second cleanup is breaking out the macro comparison code from the
redefinition warning.  That;ll turn out useful for modules.

Finally, there's a filename comparison needed for the location
optimization of rewinding from line 2 (occurs during the emission of
builtin macros).

	libcpp/
	* internal.h (_cpp_notify_macro_use): Add location parm.
	(_cpp_maybe_notify_macro_use): Likewise.
	* directives.c (_cpp_do_file_change): Check we've not changed file
	when optimizing a rewind.
	(do_ifdef): Pass location to _cpp_maybe_notify_macro_use.
	(do_ifndef): Likewise.  Delete obsolete comment about powerpc.
	* expr.c (parse_defined): Pass location to
	_cpp_maybe_notify_macro_use.
	* macro.c (enter_macro_context): Likewise.
	(warn_of_redefinition): Break out helper function.  Call it.
	(compare_macros): New function broken out of warn_of_redefinition.
	(_cpp_new_macro): Zero all fields.
	(_cpp_notify_macro_use): Add location parameter.

The clever hack of '#define __has_include __has_include' breaks -dD
and -fdirectives-only, because that emits definitions.  This turns
__has_include into a proper builtin macro.  Thus it's never emitted
via -dD, and because use outside of directive processing is undefined,
we can just expand it anywhere.

	PR preprocessor/93452
	* internal.h (struct spec_nodes): Drop n__has_include{,_next}.
	* directives.c (lex_macro_node): Don't check __has_include redef.
	* expr.c (eval_token): Drop __has_include eval.
	(parse_has_include): Move to ...
	* macro.c (builtin_has_include): ... here.
	(_cpp_builtin_macro_text): Eval __has_include{,_next}.
	* include/cpplib.h (enum cpp_builtin_type): Add BT_HAS_INCLUDE{,_NEXT}.
	* init.c (builtin_array): Add them.
	(cpp_init_builtins): Drop __has_include{,_next} init here ...
	* pch.c (cpp_read_state): ... and here.
	* traditional.c (enum ls): Drop has_include states ...
	(_cpp_scan_out_logical_line): ... and here.

I noticed, but ignored this code when addressing p80005, but having
fixed up defined(X) on the modules branch, I could see where it came
from, and it's obviously wrong as we've just pulled out a string
contant from the token.

	* expr.c (parse_has_include): Remove bogus controlling macro code.

__has_include is funky in that it is macro-like from the POV of #ifdef and
friends, but lexes its parenthesize argument #include-like.  We were
failing the second part of that, because we used a forwarding macro to an
internal name, and hence always lexed the argument in macro-parameter
context.  We componded that by not setting the right flag when lexing, so
it didn't even know.  Mostly users got lucky.

This reimplements the handline.
1) Remove the forwarding, but declare object-like macros that
expand to themselves.  This satisfies the #ifdef requirement

2) Correctly set angled_brackets when lexing the parameter.  This tells
the lexer (a) <...> is a header name and (b) "..." is too (not a string).

3) Remove the in__has_include lexer state, just tell find_file that that's
what's happenning, so it doesn't emit an error.

We lose the (undocumented) ability to #undef __has_include.  That may well
have been an accident of implementation.  There are no tests for it.

We gain __has_include behaviour for all users of the preprocessors -- not
just the C-family ones that defined a forwarding macro.

	libcpp/
	PR preprocessor/80005
	* include/cpplib.h (BT_HAS_ATTRIBUTE): Fix comment.
	* internal.h (struct lexer_state): Delete in__has_include field.
	(struct spec_nodes): Rename n__has_include{,_next}__ fields.
	(_cpp_defined_macro_p): New.
	(_cpp_find_file): Add has_include parm.
	* directives.c (lex_macro_node): Combine defined,
	__has_inline{,_next} checking.
	(do_ifdef, do_ifndef): Use _cpp_defined_macro_p.
	(_cpp_init_directives): Refactor.
	* expr.c (parse_defined): Use _cpp_defined_macro_p.
	(eval_token): Adjust parse_has_include calls.
	(parse_has_include): Add OP parameter.  Reimplement.
	* files.c (_cpp_find_file): Add HAS_INCLUDE parm.  Use it to
	inhibit error message.
	(_cpp_stack_include): Adjust _cpp_find_file call.
	(_cpp_fake_include, _cpp_compare_file_date): Likewise.
	(open_file_failed): Remove in__has_include check.
	(_cpp_has_header): Adjust _cpp_find_file call.
	* identifiers.c (_cpp_init_hashtable): Don't init
	__has_include{,_next} here ...
	* init.c (cpp_init_builtins): ... init them here.  Define as
	macros.
	(cpp_read_main_file): Adjust _cpp_find_file call.
	* pch.c (cpp_read_state): Adjust __has_include{,_next} access.
	* traditional.c (_cpp_scan_out_locgical_line): Likewise.

	gcc/c-family/
	PR preprocessor/80005
	* c-cppbuiltins.c (c_cpp_builtins): Don't define __has_include{,_next}.

	gcc/testsuite/
	PR preprocessor/80005
	* g++.dg/cpp1y/feat-cxx14.C: Adjust.
	* g++.dg/cpp1z/feat-cxx17.C: Adjust.
	* g++.dg/cpp2a/feat-cxx2a.C: Adjust.
	* g++.dg/cpp/pr80005.C: New.

the preprocessor evaluator has a skip_eval counter, but we weren't
checking it after parsing has_include(foo), but before looking for
foo.  Resulting in unnecessary io for 'FALSE_COND && has_include <foo>'

	PR preprocessor/93306
	* expr.c (parse_has_include): Refactor.  Check skip_eval before
	looking.

From-SVN: r279813

ISO C2x adds decimal floating point as an optional standard feature.
This patch accordingly makes GCC accept DFP constants (DF, DD, DL, df,
dd, dl suffixes) in strict C2X mode, with a pedwarn-if-pedantic for
older standards and a warning with -Wc11-c2x-compat even in C2x mode
(which in turn requires -Wc11-c2x-compat to be newly passed through to
libcpp).

Bootstrapped with no regressions on x86_64-pc-linux-gnu.

gcc/c-family:
	* c.opt (Wc11-c2x-compat): Add CPP(cpp_warn_c11_c2x_compat)
	CppReason(CPP_W_C11_C2X_COMPAT).

gcc/testsuite:
	* gcc.dg/dfp/c11-constants-1.c, gcc.dg/dfp/c11-constants-2.c,
	gcc.dg/dfp/c2x-constants-1.c, gcc.dg/dfp/c2x-constants-2.c: New
	tests.
	* gcc.dg/dfp/constants-pedantic.c: Use -std=gnu17 explicitly.
	Update expected diagnostics.

libcpp:
	* include/cpplib.h (struct cpp_options): Add dfp_constants and
	cpp_warn_c11_c2x_compat.
	(enum cpp_warning_reason): Add CPP_W_C11_C2X_COMPAT.
	* init.c (struct lang_flags): Add dfp_constants.
	(lang_defaults): Set dfp_constants to 1 for GNUC2X and STDC2X and
	0 for other languages.
	(cpp_set_lang): Set dfp_constants from language.
	(cpp_create_reader): Set cpp_warn_c11_c2x_compat to -1.
	* expr.c (interpret_float_suffix): Mention DFP constants as C2X in
	comment.
	(cpp_classify_number): Do not diagnose DFP constants for languages
	setting dfp_constants, unless cpp_warn_c11_c2x_compat.

From-SVN: r276908

From-SVN: r275343

	PR preprocessor/88974
	* directives.c (SEEN_EOL): Move macro to ...
	* internal.h (SEEN_EOL): ... here.
	* expr.c (parse_has_include): Don't cpp_get_token if SEEN_EOL ().

	* c-c++-common/cpp/pr88974.c: New test.

From-SVN: r268285

From-SVN: r267494

Historically GCC used location_t, while libcpp used source_location.

This inconsistency has been annoying me for a while, so this patch
removes source_location in favor of location_t throughout
(as the latter is shorter).

gcc/ChangeLog:
	* builtins.c: Replace "source_location" with "location_t".
	* diagnostic-show-locus.c: Likewise.
	* diagnostic.c: Likewise.
	* dumpfile.c: Likewise.
	* gcc-rich-location.h: Likewise.
	* genmatch.c: Likewise.
	* gimple.h: Likewise.
	* gimplify.c: Likewise.
	* input.c: Likewise.
	* input.h: Likewise.  Eliminate the typedef.
	* omp-expand.c: Likewise.
	* selftest.h: Likewise.
	* substring-locations.h (get_source_location_for_substring):
	Rename to..
	(get_location_within_string): ...this.
	* tree-cfg.c: Replace "source_location" with "location_t".
	* tree-cfgcleanup.c: Likewise.
	* tree-diagnostic.c: Likewise.
	* tree-into-ssa.c: Likewise.
	* tree-outof-ssa.c: Likewise.
	* tree-parloops.c: Likewise.
	* tree-phinodes.c: Likewise.
	* tree-phinodes.h: Likewise.
	* tree-ssa-loop-ivopts.c: Likewise.
	* tree-ssa-loop-manip.c: Likewise.
	* tree-ssa-phiopt.c: Likewise.
	* tree-ssa-phiprop.c: Likewise.
	* tree-ssa-threadupdate.c: Likewise.
	* tree-ssa.c: Likewise.
	* tree-ssa.h: Likewise.
	* tree-vect-loop-manip.c: Likewise.

gcc/c-family/ChangeLog:
	* c-common.c (c_get_substring_location): Update for renaming of
	get_source_location_for_substring to get_location_within_string.
	* c-lex.c: Replace "source_location" with "location_t".
	* c-opts.c: Likewise.
	* c-ppoutput.c: Likewise.

gcc/c/ChangeLog:
	* c-decl.c: Replace "source_location" with "location_t".
	* c-tree.h: Likewise.
	* c-typeck.c: Likewise.
	* gimple-parser.c: Likewise.

gcc/cp/ChangeLog:
	* call.c: Replace "source_location" with "location_t".
	* cp-tree.h: Likewise.
	* cvt.c: Likewise.
	* name-lookup.c: Likewise.
	* parser.c: Likewise.
	* typeck.c: Likewise.

gcc/fortran/ChangeLog:
	* cpp.c: Replace "source_location" with "location_t".
	* gfortran.h: Likewise.

gcc/go/ChangeLog:
	* go-gcc-diagnostics.cc: Replace "source_location" with "location_t".
	* go-gcc.cc: Likewise.
	* go-linemap.cc: Likewise.
	* go-location.h: Likewise.
	* gofrontend/README: Likewise.

gcc/jit/ChangeLog:
	* jit-playback.c: Replace "source_location" with "location_t".

gcc/testsuite/ChangeLog:
	* g++.dg/plugin/comment_plugin.c: Replace "source_location" with
	"location_t".
	* gcc.dg/plugin/diagnostic_plugin_test_show_locus.c: Likewise.

libcc1/ChangeLog:
	* libcc1plugin.cc: Replace "source_location" with "location_t".
	(plugin_context::get_source_location): Rename to...
	(plugin_context::get_location_t): ...this.
	* libcp1plugin.cc: Likewise.

libcpp/ChangeLog:
	* charset.c: Replace "source_location" with "location_t".
	* directives-only.c: Likewise.
	* directives.c: Likewise.
	* errors.c: Likewise.
	* expr.c: Likewise.
	* files.c: Likewise.
	* include/cpplib.h: Likewise.  Rename MAX_SOURCE_LOCATION to
	MAX_LOCATION_T.
	* include/line-map.h: Likewise.
	* init.c: Likewise.
	* internal.h: Likewise.
	* lex.c: Likewise.
	* line-map.c: Likewise.
	* location-example.txt: Likewise.
	* macro.c: Likewise.
	* pch.c: Likewise.
	* traditional.c: Likewise.

From-SVN: r266085

https://gcc.gnu.org/ml/gcc-patches/2018-08/msg00897.html
	libcpp/
	* include/cpplib.h (cpp_user_macro_p, cpp_builtin_macro_p)
	(cpp_macro_p): New inlines.
	* directives.c (do_pragma_poison): Use cpp_macro_p.
	(do_ifdef, do_ifndef): Likewise.  Use _cpp_maybe_notify_macro_use.
	(cpp_pop_definition): Use cpp_macro_p.  Move _cpp_free_definition
	earlier.  Don't zap node directly.
	* expr.c (parse_defined): Use _cpp_maybe_notify_macro_use &
	cpp_macro_p.
	* files.c (should_stack_file): Use cpp_macro_p.
	* identifiers.c (cpp_defined): Likewise.
	* internal.h (_cpp_mark_macro): Use cpp_user_macro_p.
	(_cpp_notify_macro_use): Declare.
	(_cpp_maybe_notify_macro_use): New inline.
	* lex.c (is_macro): Use cpp_macro_p.
	* macro.c (_cpp_warn_if_unused_macro): Use cpp_user_macro_p.
	(enter_macro_context): Likewise.
	(_cpp_create_definition): Use cpp_builtin_macro_p,
	cpp_user_macro_p.  Move _cpp_free_definition earlier.
	(_cpp_notify_macro_use): New, broken out of multiple call sites.
	* traditional.c (fun_like_macro_p): Use cpp_builtin_macro_p.
	(maybe_start_funlike, _cpp_scan_out_logical_line)
	(push_replacement_text): Likewise.
	gcc/c-family/
	* c-ada-spec.c (count_ada_macro): Use cpp_user_macro_p.
	(store_ada_macro): Likewise.
	* c-ppoutput.c (cb_used_define, dump_macro): Likewise.
	* c-spellcheck.cc (should-suggest_as_macro_p): Likewise,
	gcc/
	* config/rs6000/rs6000-c.c (rs6000_macro_to_expend): Use cpp_macro_p.
	* config/powerpcspc/powerpcspe-c.c (rs6000_macro_to_expend): Likewise.
	gcc/cp/
	* name-lookup.c (lookup_name_fuzzy): Likewise.
	gcc/fortran/
	* cpp.c (dump_macro): Use cpp_user_macro_p.

From-SVN: r263587

From-SVN: r256169

	PR c++/79228
	* expr.c (interpret_float_suffix): Avoid memcmp.
	(interpret_int_suffix): Likewise.  Don't check for if.

From-SVN: r255434

libcpp/
	* expr.c (interpret_float_suffix): Ignore 'i' in C++14 and up.
	(interpret_int_suffix): Likewise.
gcc/cp/
	* parser.c (cp_parser_userdef_numeric_literal): Be helpful about
	'i' in C++14 and up.

From-SVN: r255335

	* doc/invoke.texi: Document -std=c++17 and -std=gnu++17 and document
	c++1z and gnu++1z as deprecated.  Change other references to
	-std=c++1z to -std=c++17 and -std=gnu++1z to -std=gnu++17.
	Change -Wc++1z-compat to -Wc++17-compat.
	* doc/cpp.texi: Document -std=c++17 defines __cplusplus 201703L.
	* dwarf2out.c (highest_c_language): Handle C++17.
	(gen_compile_unit_die): Likewise.
c-family/
	* c.opt (Wc++1z-compat): Change from option to undocumented alias.
	(Wc++17-compat): Change from undocumented alias to option.
	(Wnoexcept-type): Enable by Wc++17-compat instead of Wc++1z-compat,
	change C++1z to C++17 in description.
	(std=c++1z, std=gnu++1z): Change from option to undocumented
	deprecated alias.
	(std=c++17, std=gnu++17): Change from undocumented alias to option.
	Adjust description.
	* c-common.h (enum cxx_dialect): Rename cxx1z to cxx17.
	* c-opts.c (set_std_cxx1z): Rename to ...
	(set_std_cxx17): ... this.
	(c_common_handle_option): Rename OPT_std_c__1z to OPT_std_c__17
	and OPT_std_gnu__1z to OPT_std_gnu__17.  Adjust set_std_cxx1z
	caller.  
	(c_common_post_options): Use cxx17 instead of cxx1z.  Adjust
	comments.
cp/
	* decl.c (redeclaration_error_message): Use cxx17 instead of cxx1z,
	adjust diagnostics refering to C++1z or -std=gnu++1z or -std=c++1z
	to C++17 or -std=gnu++17 or -std=c++17.  Adjust comments.
	(cxx_init_decl_processing, next_initializable_field,
	is_direct_enum_init, check_initializer, cp_finish_decl,
	mark_inline_variable, grokdeclarator, grokparms, xref_basetypes,
	finish_function): Likewise.
	* cp-tree.h (DECL_INLINE_VAR_P): Likewise.
	* pt.c (mark_template_parm, convert_nontype_argument,
	instantiate_class_template_1, type_unification_real, unify,
	get_partial_spec_bindings, dependent_type_p_r): Likewise.
	* typeck.c (cp_build_unary_op): Likewise.
	* constexpr.c (var_in_maybe_constexpr_fn): Likewise.
	* call.c (build_user_type_conversion_1, build_over_call,
	build_special_member_call): Likewise.
	* lambda.c (begin_lambda_type): Likewise.
	* typeck2.c (process_init_constructor_record): Likewise.
	* class.c (build_base_field, finalize_literal_type_property,
	explain_non_literal_class): Likewise.
	* parser.c (cp_parser_diagnose_invalid_type_name,
	cp_parser_primary_expression, cp_parser_lambda_introducer,
	cp_parser_lambda_declarator_opt, cp_parser_selection_statement,
	cp_convert_range_for, cp_parser_perform_range_for_lookup,
	cp_parser_decomposition_declaration, cp_parser_linkage_specification,
	cp_parser_static_assert, cp_parser_simple_type_specifier,
	cp_parser_namespace_definition, cp_parser_using_declaration,
	cp_parser_init_declarator, cp_parser_type_parameter_key,
	cp_parser_exception_specification_opt, cp_parser_std_attribute_spec,
	cp_parser_constructor_declarator_p): Likewise.
	* mangle.c (struct globals): Rename need_cxx1z_warning to
	need_cxx17_warning.
	(write_exception_spec, start_mangling, mangle_decl): Likewise.
	* Make-lang.in (check-c++1z): Rename to check-c++17, depend on
	it.
	(check-c++17): New goal.  Use 17 instead of 1z.
	(check-c++-all): Use 17 instead of 1z.
testsuite/
	* lib/g++-dg.exp (g++-dg-runtest): Use 17 instead of 1z.
	* lib/target-supports.exp (check_effective_target_c++14): Use
	check_effective_target_c++17 instead of check_effective_target_c++1z.
	(check_effective_target_c++14_down): Likewise.
	(check_effective_target_c++1z_only): Rename to ...
	(check_effective_target_c++17_only): ... this.
	(check_effective_target_c++1z): Rename to ...
	(check_effective_target_c++17): ... this.
	* g++.dg/debug/dwarf2/inline-var-1.C: Use -std=c++17 or -std=gnu++17
	instead of -std=c++1z or -std=gnu++1z.  Use c++17 instead of c++1z
	and c++17_only instead of c++1z_only.  Adjust expected diagnostics
	and comments refering to 1z to 17.
	* g++.dg/debug/dwarf2/inline-var-2.C: Likewise.
	* g++.dg/template/partial5.C: Likewise.
	* g++.dg/template/nontype8.C: Likewise.
	* g++.dg/cpp1z/noexcept-type5.C: Likewise.
	* g++.dg/cpp1z/nontype3a.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda4.C: Likewise.
	* g++.dg/cpp1z/noexcept-type16.C: Likewise.
	* g++.dg/cpp1z/class-deduction32.C: Likewise.
	* g++.dg/cpp1z/pr78771.C: Likewise.
	* g++.dg/cpp1z/elide1.C: Likewise.
	* g++.dg/cpp1z/fold3.C: Likewise.
	* g++.dg/cpp1z/class-deduction2.C: Likewise.
	* g++.dg/cpp1z/noexcept-type12.C: Likewise.
	* g++.dg/cpp1z/inline-var2.C: Likewise.
	* g++.dg/cpp1z/eval-order2.C: Likewise.
	* g++.dg/cpp1z/decomp21.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda11.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda9.C: Likewise.
	* g++.dg/cpp1z/utf8-neg.C: Likewise.
	* g++.dg/cpp1z/class-deduction41.C: Likewise.
	* g++.dg/cpp1z/class-deduction23.C: Likewise.
	* g++.dg/cpp1z/nodiscard3.C: Likewise.
	* g++.dg/cpp1z/static_assert-nomsg.C: Likewise.
	* g++.dg/cpp1z/noexcept-type9.C: Likewise.
	* g++.dg/cpp1z/class-deduction21.C: Likewise.
	* g++.dg/cpp1z/range-for1.C: Likewise.
	* g++.dg/cpp1z/init-statement4.C: Likewise.
	* g++.dg/cpp1z/udlit-utf8char.C: Likewise.
	* g++.dg/cpp1z/decomp30.C: Likewise.
	* g++.dg/cpp1z/class-deduction39.C: Likewise.
	* g++.dg/cpp1z/register2.C: Likewise.
	* g++.dg/cpp1z/decomp9.C: Likewise.
	* g++.dg/cpp1z/regress1.C: Likewise.
	* g++.dg/cpp1z/direct-enum-init1.C: Likewise.
	* g++.dg/cpp1z/class-deduction30.C: Likewise.
	* g++.dg/cpp1z/abbrev2.C: Likewise.
	* g++.dg/cpp1z/nontype-auto6.C: Likewise.
	* g++.dg/cpp1z/regress2.C: Likewise.
	* g++.dg/cpp1z/decomp16.C: Likewise.
	* g++.dg/cpp1z/bool-increment1.C: Likewise.
	* g++.dg/cpp1z/aligned-new1.C: Likewise.
	* g++.dg/cpp1z/decomp3.C: Likewise.
	* g++.dg/cpp1z/register1.C: Likewise.
	* g++.dg/cpp1z/namespace-attribs.C: Likewise.
	* g++.dg/cpp1z/class-deduction1.C: Likewise.
	* g++.dg/cpp1z/decomp10.C: Likewise.
	* g++.dg/cpp1z/constexpr-if11.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda10.C: Likewise.
	* g++.dg/cpp1z/decomp27.C: Likewise.
	* g++.dg/cpp1z/noexcept-type2.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda6.C: Likewise.
	* g++.dg/cpp1z/class-deduction9.C: Likewise.
	* g++.dg/cpp1z/attributes-enum-1.C: Likewise.
	* g++.dg/cpp1z/decomp11.C: Likewise.
	* g++.dg/cpp1z/aligned-new3.C: Likewise.
	* g++.dg/cpp1z/utf8-2.C: Likewise.
	* g++.dg/cpp1z/lambda-this3.C: Likewise.
	* g++.dg/cpp1z/decomp-constexpr1.C: Likewise.
	* g++.dg/cpp1z/byte1.C: Likewise.
	* g++.dg/cpp1z/nontype-auto9.C: Likewise.
	* g++.dg/cpp1z/aggr-base4.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda1.C: Likewise.
	* g++.dg/cpp1z/nontype-auto3.C: Likewise.
	* g++.dg/cpp1z/utf8-2a.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda7.C: Likewise.
	* g++.dg/cpp1z/aggr-base6.C: Likewise.
	* g++.dg/cpp1z/cplusplus.C: Likewise.
	* g++.dg/cpp1z/class-deduction20.C: Likewise.
	* g++.dg/cpp1z/aggr-base2.C: Likewise.
	* g++.dg/cpp1z/class-deduction6.C: Likewise.
	* g++.dg/cpp1z/noexcept-type3.C: Likewise.
	* g++.dg/cpp1z/class-deduction31.C: Likewise.
	* g++.dg/cpp1z/class-deduction25.C: Likewise.
	* g++.dg/cpp1z/class-deduction18.C: Likewise.
	* g++.dg/cpp1z/fold9.C: Likewise.
	* g++.dg/cpp1z/noexcept-type8.C: Likewise.
	* g++.dg/cpp1z/abbrev1.C: Likewise.
	* g++.dg/cpp1z/constexpr-if10.C: Likewise.
	* g++.dg/cpp1z/utf8.C: Likewise.
	* g++.dg/cpp1z/noexcept-type7.C: Likewise.
	* g++.dg/cpp1z/aggr-base3.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda8.C: Likewise.
	* g++.dg/cpp1z/init-statement2.C: Likewise.
	* g++.dg/cpp1z/nontype-auto4.C: Likewise.
	* g++.dg/cpp1z/constexpr-if12.C: Likewise.
	* g++.dg/cpp1z/class-deduction40.C: Likewise.
	* g++.dg/cpp1z/nontype3.C: Likewise.
	* g++.dg/cpp1z/class-deduction14.C: Likewise.
	* g++.dg/cpp1z/fold7.C: Likewise.
	* g++.dg/cpp1z/nontype2.C: Likewise.
	* g++.dg/cpp1z/class-deduction15.C: Likewise.
	* g++.dg/cpp1z/nested-namespace-def1.C: Likewise.
	* g++.dg/cpp1z/class-deduction13.C: Likewise.
	* g++.dg/cpp1z/aligned-new7.C: Likewise.
	* g++.dg/cpp1z/noexcept-type1.C: Likewise.
	* g++.dg/cpp1z/nontype1.C: Likewise.
	* g++.dg/cpp1z/init-statement5.C: Likewise.
	* g++.dg/cpp1z/nontype-auto2.C: Likewise.
	* g++.dg/cpp1z/decomp17.C: Likewise.
	* g++.dg/cpp1z/fold4.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda2.C: Likewise.
	* g++.dg/cpp1z/fold7a.C: Likewise.
	* g++.dg/cpp1z/nontype-auto5.C: Likewise.
	* g++.dg/cpp1z/init-statement7.C: Likewise.
	* g++.dg/cpp1z/aggr-base5.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda5.C: Likewise.
	* g++.dg/cpp1z/pr79143.C: Likewise.
	* g++.dg/cpp1z/class-deduction38.C: Likewise.
	* g++.dg/cpp1z/nontype-auto8.C: Likewise.
	* g++.dg/cpp1z/class-deduction12.C: Likewise.
	* g++.dg/cpp1z/decomp20.C: Likewise.
	* g++.dg/cpp1z/class-deduction22.C: Likewise.
	* g++.dg/cpp1z/class-deduction29.C: Likewise.
	* g++.dg/cpp1z/class-deduction8.C: Likewise.
	* g++.dg/cpp1z/class-deduction43.C: Likewise.
	* g++.dg/cpp1z/feat-cxx1z.C: Likewise.
	* g++.dg/cpp1z/fold8.C: Likewise.
	* g++.dg/cpp1z/init-statement3.C: Likewise.
	* g++.dg/cpp1z/nontype-auto10.C: Likewise.
	* g++.dg/cpp1z/class-deduction36.C: Likewise.
	* g++.dg/cpp1z/noexcept-type17.C: Likewise.
	* g++.dg/cpp1z/fallthrough1.C: Likewise.
	* g++.dg/cpp1z/fold1.C: Likewise.
	* g++.dg/cpp1z/class-deduction26.C: Likewise.
	* g++.dg/cpp1z/fold-ice1.C: Likewise.
	* g++.dg/cpp1z/fold5.C: Likewise.
	* g++.dg/cpp1z/class-deduction34.C: Likewise.
	* g++.dg/cpp1z/noexcept-type6.C: Likewise.
	* g++.dg/cpp1z/class-deduction7.C: Likewise.
	* g++.dg/cpp1z/class-deduction16.C: Likewise.
	* g++.dg/cpp1z/class-deduction10.C: Likewise.
	* g++.dg/cpp1z/eval-order3.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda13.C: Likewise.
	* g++.dg/cpp1z/aggr-base2a.C: Likewise.
	* g++.dg/cpp1z/nontype-auto1.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda3.C: Likewise.
	* g++.dg/cpp1z/nontype-auto7.C: Likewise.
	* g++.dg/cpp1z/decomp15.C: Likewise.
	* g++.dg/cpp1z/noexcept-type4.C: Likewise.
	* g++.dg/cpp1z/fold-mangle.C: Likewise.
	* g++.dg/cpp1z/class-deduction35.C: Likewise.
	* g++.dg/cpp1z/decomp4.C: Likewise.
	* g++.dg/cpp1z/class-deduction42.C: Likewise.
	* g++.dg/cpp1z/init-statement8.C: Likewise.
	* g++.dg/cpp1z/inline-var1a.C: Likewise.
	* g++.dg/cpp1z/init-statement6.C: Likewise.
	* g++.dg/cpp1z/class-deduction17.C: Likewise.
	* g++.dg/cpp1z/class-deduction28.C: Likewise.
	* g++.dg/cpp1z/class-deduction27.C: Likewise.
	* g++.dg/cpp1z/decomp-bitfield1.C: Likewise.
	* g++.dg/cpp1z/attributes-enum-1a.C: Likewise.
	* g++.dg/cpp1z/class-deduction11.C: Likewise.
	* g++.dg/cpp1z/constexpr-lambda12.C: Likewise.
	* g++.dg/cpp1z/init-statement9.C: Likewise.
	* g++.dg/cpp1z/class-deduction19.C: Likewise.
	* g++.dg/cpp1z/class-deduction5.C: Likewise.
	* g++.dg/cpp1z/fold2.C: Likewise.
	* g++.dg/cpp1z/class-deduction33.C: Likewise.
	* g++.dg/cpp1z/class-deduction24.C: Likewise.
	* g++.dg/cpp1z/aggr-base1.C: Likewise.
	* g++.dg/cpp1z/fold6.C: Likewise.
	* g++.dg/cpp1z/decomp12.C: Likewise.
	* g++.dg/cpp1z/class-deduction4.C: Likewise.
	* g++.dg/cpp1z/inline-var1.C: Likewise.
	* g++.dg/cpp1z/aligned-new2.C: Likewise.
	* g++.dg/cpp1z/class-deduction3.C: Likewise.
	* g++.dg/other/error3.C: Likewise.
	* g++.dg/init/new25.C: Likewise.
	* g++.dg/init/new13.C: Likewise.
	* g++.dg/tls/diag-2.C: Likewise.
	* g++.dg/tls/diag-4.C: Likewise.
	* g++.dg/opt/noreturn-1.C: Likewise.
	* g++.dg/eh/async-unwind2.C: Likewise.
	* g++.dg/eh/spec9.C: Likewise.
	* g++.dg/eh/spec7.C: Likewise.
	* g++.dg/eh/template1.C: Likewise.
	* g++.dg/eh/cond4.C: Likewise.
	* g++.dg/eh/pr41819.C: Likewise.
	* g++.dg/eh/delete1.C: Likewise.
	* g++.dg/eh/spec3.C: Likewise.
	* g++.dg/eh/forced4.C: Likewise.
	* g++.dg/eh/spec2.C: Likewise.
	* g++.dg/eh/shadow1.C: Likewise.
	* g++.dg/eh/pr38662.C: Likewise.
	* g++.dg/eh/ehopt1.C: Likewise.
	* g++.dg/eh/spec8.C: Likewise.
	* g++.dg/eh/init-temp2.C: Likewise.
	* g++.dg/rtti/crash3.C: Likewise.
	* g++.dg/warn/Wreturn-type-3.C: Likewise.
	* g++.dg/warn/register-parm-1.C: Likewise.
	* g++.dg/warn/register-var-2.C: Likewise.
	* g++.dg/gcov/gcov-7.C: Likewise.
	* g++.dg/tree-ssa/pr45605.C: Likewise.
	* g++.dg/cpp/pr23827_cxx98_neg.C: Likewise.
	* g++.dg/lookup/exception1.C: Likewise.
	* g++.dg/ubsan/pr79589.C: Likewise.
	* g++.dg/tm/pr47340.C: Likewise.
	* g++.dg/tm/pr46567.C: Likewise.
	* g++.dg/expr/bitfield5.C: Likewise.
	* g++.dg/expr/bool1.C: Likewise.
	* g++.dg/expr/lval3.C: Likewise.
	* g++.dg/expr/lval4.C: Likewise.
	* g++.dg/expr/bitfield4.C: Likewise.
	* g++.dg/expr/bitfield6.C: Likewise.
	* g++.dg/expr/bool3.C: Likewise.
	* g++.dg/ext/has_nothrow_constructor.C: Likewise.
	* g++.dg/ext/has_nothrow_copy-7.C: Likewise.
	* g++.dg/ext/has_nothrow_copy-1.C: Likewise.
	* g++.dg/ext/has_nothrow_copy-2.C: Likewise.
	* g++.dg/ext/has_nothrow_copy-4.C: Likewise.
	* g++.dg/ext/has_nothrow_copy-5.C: Likewise.
	* g++.dg/ext/has_nothrow_copy-6.C: Likewise.
	* g++.dg/ext/has_nothrow_assign.C: Likewise.
	* g++.dg/parse/register1.C: Likewise.
	* g++.dg/parse/error15.C: Likewise.
	* g++.dg/parse/linkage2.C: Likewise.
	* g++.dg/concepts/intro2.C: Likewise.
	* g++.dg/concepts/class.C: Likewise.
	* g++.dg/concepts/traits1.C: Likewise.
	* g++.dg/concepts/req5.C: Likewise.
	* g++.dg/concepts/var-concept5.C: Likewise.
	* g++.dg/concepts/fn-concept2.C: Likewise.
	* g++.dg/concepts/traits2.C: Likewise.
	* g++.dg/concepts/placeholder2.C: Likewise.
	* g++.dg/concepts/class6.C: Likewise.
	* g++.dg/concepts/memtmpl1.C: Likewise.
	* g++.dg/concepts/friend2.C: Likewise.
	* g++.dg/concepts/template-parm3.C: Likewise.
	* g++.dg/concepts/template-parm10.C: Likewise.
	* g++.dg/concepts/explicit-spec1.C: Likewise.
	* g++.dg/concepts/explicit-spec3.C: Likewise.
	* g++.dg/concepts/var-templ2.C: Likewise.
	* g++.dg/concepts/intro5.C: Likewise.
	* g++.dg/concepts/deduction-constraint1.C: Likewise.
	* g++.dg/concepts/iconv1.C: Likewise.
	* g++.dg/concepts/constrained-parm.C: Likewise.
	* g++.dg/concepts/template-template-parm1.C: Likewise.
	* g++.dg/concepts/var-concept3.C: Likewise.
	* g++.dg/concepts/class3.C: Likewise.
	* g++.dg/concepts/memfun2.C: Likewise.
	* g++.dg/concepts/req1.C: Likewise.
	* g++.dg/concepts/disjunction1.C: Likewise.
	* g++.dg/concepts/req17.C: Likewise.
	* g++.dg/concepts/pr65848.C: Likewise.
	* g++.dg/concepts/placeholder4.C: Likewise.
	* g++.dg/concepts/decl-diagnose.C: Likewise.
	* g++.dg/concepts/intro7.C: Likewise.
	* g++.dg/concepts/pr68683.C: Likewise.
	* g++.dg/concepts/partial-spec4.C: Likewise.
	* g++.dg/concepts/template-parm5.C: Likewise.
	* g++.dg/concepts/explicit-inst1.C: Likewise.
	* g++.dg/concepts/class-deduction1.C: Likewise.
	* g++.dg/concepts/class1.C: Likewise.
	* g++.dg/concepts/req15.C: Likewise.
	* g++.dg/concepts/memfun.C: Likewise.
	* g++.dg/concepts/pr68434.C: Likewise.
	* g++.dg/concepts/inherit-ctor4.C: Likewise.
	* g++.dg/concepts/partial-spec6.C: Likewise.
	* g++.dg/concepts/var-templ1.C: Likewise.
	* g++.dg/concepts/template-parm8.C: Likewise.
	* g++.dg/concepts/explicit-inst3.C: Likewise.
	* g++.dg/concepts/class4.C: Likewise.
	* g++.dg/concepts/req6.C: Likewise.
	* g++.dg/concepts/fn8.C: Likewise.
	* g++.dg/concepts/class5.C: Likewise.
	* g++.dg/concepts/placeholder5.C: Likewise.
	* g++.dg/concepts/req16.C: Likewise.
	* g++.dg/concepts/req10.C: Likewise.
	* g++.dg/concepts/var-concept2.C: Likewise.
	* g++.dg/concepts/auto3.C: Likewise.
	* g++.dg/concepts/generic-fn-err.C: Likewise.
	* g++.dg/concepts/pr65552.C: Likewise.
	* g++.dg/concepts/partial-concept-id2.C: Likewise.
	* g++.dg/concepts/fn1.C: Likewise.
	* g++.dg/concepts/partial-spec.C: Likewise.
	* g++.dg/concepts/template-parm12.C: Likewise.
	* g++.dg/concepts/diagnostic1.C: Likewise.
	* g++.dg/concepts/intro1.C: Likewise.
	* g++.dg/concepts/explicit-inst4.C: Likewise.
	* g++.dg/concepts/req18.C: Likewise.
	* g++.dg/concepts/explicit-spec5.C: Likewise.
	* g++.dg/concepts/var-concept6.C: Likewise.
	* g++.dg/concepts/fn9.C: Likewise.
	* g++.dg/concepts/req2.C: Likewise.
	* g++.dg/concepts/template-parm7.C: Likewise.
	* g++.dg/concepts/req14.C: Likewise.
	* g++.dg/concepts/template-parm6.C: Likewise.
	* g++.dg/concepts/variadic4.C: Likewise.
	* g++.dg/concepts/fn6.C: Likewise.
	* g++.dg/concepts/req-neg1.C: Likewise.
	* g++.dg/concepts/alias3.C: Likewise.
	* g++.dg/concepts/expression2.C: Likewise.
	* g++.dg/concepts/partial-spec3.C: Likewise.
	* g++.dg/concepts/expression3.C: Likewise.
	* g++.dg/concepts/memfun-err.C: Likewise.
	* g++.dg/concepts/pr66091.C: Likewise.
	* g++.dg/concepts/explicit-spec2.C: Likewise.
	* g++.dg/concepts/equiv.C: Likewise.
	* g++.dg/concepts/friend1.C: Likewise.
	* g++.dg/concepts/fn4.C: Likewise.
	* g++.dg/concepts/var-templ3.C: Likewise.
	* g++.dg/concepts/explicit-inst2.C: Likewise.
	* g++.dg/concepts/alias2.C: Likewise.
	* g++.dg/concepts/regress/alias-decl-42.C: Likewise.
	* g++.dg/concepts/placeholder6.C: Likewise.
	* g++.dg/concepts/fn10.C: Likewise.
	* g++.dg/concepts/req3.C: Likewise.
	* g++.dg/concepts/variadic2.C: Likewise.
	* g++.dg/concepts/pr65636.C: Likewise.
	* g++.dg/concepts/intro6.C: Likewise.
	* g++.dg/concepts/class2.C: Likewise.
	* g++.dg/concepts/fn2.C: Likewise.
	* g++.dg/concepts/req20.C: Likewise.
	* g++.dg/concepts/req8.C: Likewise.
	* g++.dg/concepts/placeholder1.C: Likewise.
	* g++.dg/concepts/pr65854.C: Likewise.
	* g++.dg/concepts/member-concept.C: Likewise.
	* g++.dg/concepts/template-parm2.C: Likewise.
	* g++.dg/concepts/variadic1.C: Likewise.
	* g++.dg/concepts/fn7.C: Likewise.
	* g++.dg/concepts/intro4.C: Likewise.
	* g++.dg/concepts/req13.C: Likewise.
	* g++.dg/concepts/inherit-ctor3.C: Likewise.
	* g++.dg/concepts/explicit-spec6.C: Likewise.
	* g++.dg/concepts/auto1.C: Likewise.
	* g++.dg/concepts/alias1.C: Likewise.
	* g++.dg/concepts/fn-concept1.C: Likewise.
	* g++.dg/concepts/template-parm11.C: Likewise.
	* g++.dg/concepts/explicit-spec4.C: Likewise.
	* g++.dg/concepts/partial-concept-id1.C: Likewise.
	* g++.dg/concepts/req9.C: Likewise.
	* g++.dg/concepts/req4.C: Likewise.
	* g++.dg/concepts/pr65681.C: Likewise.
	* g++.dg/concepts/req7.C: Likewise.
	* g++.dg/concepts/req12.C: Likewise.
	* g++.dg/concepts/fn5.C: Likewise.
	* g++.dg/concepts/alias4.C: Likewise.
	* g++.dg/concepts/generic-fn.C: Likewise.
	* g++.dg/concepts/feature-macro.C: Likewise.
	* g++.dg/concepts/req19.C: Likewise.
	* g++.dg/concepts/placeholder3.C: Likewise.
	* g++.dg/concepts/intro3.C: Likewise.
	* g++.dg/concepts/partial-spec5.C: Likewise.
	* g++.dg/concepts/template-parm4.C: Likewise.
	* g++.dg/concepts/dr1430.C: Likewise.
	* g++.dg/concepts/pr65634.C: Likewise.
	* g++.dg/concepts/var-concept4.C: Likewise.
	* g++.dg/concepts/pr67249.C: Likewise.
	* g++.dg/concepts/expression.C: Likewise.
	* g++.dg/concepts/pr65575.C: Likewise.
	* g++.dg/concepts/partial-spec2.C: Likewise.
	* g++.dg/concepts/template-parm9.C: Likewise.
	* g++.dg/concepts/inherit-ctor1.C: Likewise.
	* g++.dg/concepts/equiv2.C: Likewise.
	* g++.dg/concepts/req11.C: Likewise.
	* g++.dg/concepts/template-parm1.C: Likewise.
	* g++.dg/concepts/inherit-ctor2.C: Likewise.
	* g++.dg/concepts/var-concept1.C: Likewise.
	* g++.dg/concepts/fn3.C: Likewise.
	* g++.dg/torture/pr46364.C: Likewise.
	* g++.dg/torture/stackalign/eh-alloca-1.C: Likewise.
	* g++.dg/torture/stackalign/eh-fastcall-1.C: Likewise.
	* g++.dg/torture/stackalign/eh-vararg-1.C: Likewise.
	* g++.dg/torture/stackalign/eh-vararg-2.C: Likewise.
	* g++.dg/torture/stackalign/eh-global-1.C: Likewise.
	* g++.dg/torture/stackalign/eh-thiscall-1.C: Likewise.
	* g++.dg/torture/stackalign/eh-inline-2.C: Likewise.
	* g++.dg/torture/stackalign/eh-inline-1.C: Likewise.
	* g++.dg/torture/pr52918-1.C: Likewise.
	* g++.dg/torture/pr49394.C: Likewise.
	* g++.dg/torture/pr57190.C: Likewise.
	* g++.dg/cpp0x/static_assert8.C: Likewise.
	* g++.dg/cpp0x/noexcept19.C: Likewise.
	* g++.dg/cpp0x/variadic-throw.C: Likewise.
	* g++.dg/cpp0x/variadic73.C: Likewise.
	* g++.dg/cpp0x/noexcept02.C: Likewise.
	* g++.dg/cpp0x/defaulted23.C: Likewise.
	* g++.dg/cpp0x/noexcept08.C: Likewise.
	* g++.dg/cpp0x/auto9.C: Likewise.
	* g++.dg/cpp0x/lambda/lambda-eh2.C: Likewise.
	* g++.dg/cpp0x/error5.C: Likewise.
	* c-c++-common/gomp/atomic-12.c: Likewise.
	* c-c++-common/gomp/atomic-13.c: Likewise.
	* c-c++-common/gomp/atomic-14.c: Likewise.
	* c-c++-common/Wvarargs-2.c: Likewise.
	* c-c++-common/Wvarargs.c: Likewise.
	* c-c++-common/vector-subscript-2.c: Likewise.
	* g++.old-deja/g++.robertl/eb123.C: Likewise.
	* g++.old-deja/g++.eh/tmpl3.C: Likewise.
	* g++.old-deja/g++.eh/cleanup2.C: Likewise.
	* g++.old-deja/g++.eh/badalloc1.C: Likewise.
	* g++.old-deja/g++.eh/throw2.C: Likewise.
	* g++.old-deja/g++.eh/throw1.C: Likewise.
	* g++.old-deja/g++.eh/tmpl1.C: Likewise.
	* g++.old-deja/g++.other/new7.C: Likewise.
	* g++.old-deja/g++.other/crash30.C: Likewise.
	* g++.old-deja/g++.other/regstack.C: Likewise.
	* g++.old-deja/g++.other/crash28.C: Likewise.
	* g++.old-deja/g++.jason/bool5.C: Likewise.
	* g++.old-deja/g++.mike/p10416.C: Likewise.
	* g++.old-deja/g++.mike/eh25.C: Likewise.
	* g++.old-deja/g++.mike/eh55.C: Likewise.
libcpp/
	* include/cpplib.h (enum c_lang): Rename CLK_GNUCXX1Z
	to CLK_GNUCXX17 and CLK_CXX1Z to CLK_CXX17.
	* init.c (lang_defaults, cpp_init_builtins): Likewise.
	* expr.c (cpp_classify_number): Use C++17 instead of C++1z
	in diagnostics.
libstdc++-v3/
	* testsuite/libstdc++-prettyprinters/cxx17.cc: Use -std=c++17 or
	-std=gnu++17 instead of -std=c++1z or -std=gnu++1z.  Use c++17 instead
	of c++1z and c++17_only instead of c++1z_only.  Adjust expected
	diagnostics and comments refering to 1z to 17.
	* testsuite/30_threads/lock_guard/cons/deduction.cc: Likewise.
	* testsuite/30_threads/scoped_lock/cons/deduction.cc: Likewise.
	* testsuite/30_threads/scoped_lock/cons/1.cc: Likewise.
	* testsuite/30_threads/scoped_lock/requirements/typedefs.cc: Likewise.
	* testsuite/30_threads/scoped_lock/requirements/explicit_instantiation.cc:
	Likewise.
	* testsuite/30_threads/unique_lock/cons/deduction.cc: Likewise.
	* testsuite/18_support/launder/1.cc (test02): Likewise.
	* testsuite/18_support/launder/requirements_neg.cc: Likewise.
	* testsuite/18_support/launder/requirements.cc: Likewise.
	* testsuite/18_support/byte/requirements.cc: Likewise.
	* testsuite/18_support/byte/ops.cc: Likewise.
	* testsuite/18_support/byte/global_neg.cc: Likewise.
	* testsuite/18_support/uncaught_exceptions/uncaught_exceptions.cc:
	Likewise.
	* testsuite/27_io/types/4.cc: Likewise.
	* testsuite/25_algorithms/sample/81221.cc: Likewise.
	* testsuite/25_algorithms/sample/1.cc: Likewise.
	* testsuite/25_algorithms/sample/2.cc: Likewise.
	* testsuite/25_algorithms/search/searcher.cc: Likewise.
	* testsuite/28_regex/basic_regex/ctors/deduction.cc: Likewise.
	* testsuite/experimental/filesystem/path/construct/string_view.cc:
	Likewise.
	* testsuite/24_iterators/range_access_cpp17.cc: Likewise.
	* testsuite/24_iterators/container_access.cc: Likewise.
	* testsuite/ext/pb_ds/regression/hash_map_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/trie_set_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/hash_set_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/list_update_set_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/list_update_map_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/priority_queue_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/tree_set_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/tree_map_rand.cc: Likewise.
	* testsuite/ext/pb_ds/regression/trie_map_rand.cc: Likewise.
	* testsuite/20_util/shared_ptr/casts/reinterpret.cc: Likewise.
	* testsuite/20_util/shared_ptr/cons/deduction.cc: Likewise.
	* testsuite/20_util/shared_ptr/cons/array.cc: Likewise.
	* testsuite/20_util/shared_ptr/observers/array.cc (struct A): Likewise.
	* testsuite/20_util/pair/cons/deduction.cc: Likewise.
	* testsuite/20_util/variant/deduction.cc: Likewise.
	* testsuite/20_util/tuple/78939.cc: Likewise.
	* testsuite/20_util/tuple/cons/deduction.cc: Likewise.
	* testsuite/20_util/void_t/1.cc: Likewise.
	* testsuite/20_util/duration/arithmetic/constexpr_c++17.cc: Likewise.
	* testsuite/20_util/unique_ptr/cons/deduction_neg.cc: Likewise.
	* testsuite/20_util/addressof/requirements/constexpr.cc: Likewise.
	* testsuite/20_util/weak_ptr/cons/deduction.cc: Likewise.
	* testsuite/20_util/has_unique_object_representations/requirements/typedefs.cc:
	Likewise.
	* testsuite/20_util/has_unique_object_representations/requirements/explicit_instantiation.cc:
	Likewise.
	* testsuite/20_util/has_unique_object_representations/value.cc:
	Likewise.
	* testsuite/20_util/time_point/arithmetic/constexpr.cc: Likewise.
	* testsuite/20_util/function_objects/invoke/59768.cc: Likewise.
	* testsuite/20_util/function_objects/mem_fn/80478.cc: Likewise.
	* testsuite/20_util/function/cons/deduction.cc: Likewise.
	* testsuite/20_util/specialized_algorithms/memory_management_tools/destroy_neg.cc:
	Likewise.
	* testsuite/20_util/is_aggregate/requirements/typedefs.cc: Likewise.
	* testsuite/20_util/is_aggregate/requirements/explicit_instantiation.cc:
	Likewise.
	* testsuite/20_util/is_aggregate/value.cc: Likewise.
	* testsuite/26_numerics/lcm/1.cc: Likewise.
	* testsuite/26_numerics/lcm/lcm_neg.cc: Likewise.
	* testsuite/26_numerics/gcd/1.cc: Likewise.
	* testsuite/26_numerics/gcd/gcd_neg.cc: Likewise.
	* testsuite/26_numerics/valarray/deduction.cc: Likewise.
	* testsuite/26_numerics/headers/cmath/types_std_c++0x_neg.cc: Likewise.
	* testsuite/26_numerics/headers/cmath/hypot.cc: Likewise.
	* testsuite/23_containers/queue/members/emplace_cxx17_return.cc:
	Likewise.
	* testsuite/23_containers/array/cons/deduction.cc: Likewise.
	* testsuite/23_containers/array/cons/deduction_neg.cc: Likewise.
	* testsuite/23_containers/deque/modifiers/emplace/cxx17_return.cc:
	Likewise.
	* testsuite/23_containers/deque/cons/deduction.cc: Likewise.
	* testsuite/23_containers/stack/members/emplace_cxx17_return.cc:
	Likewise.
	* testsuite/23_containers/list/modifiers/emplace/cxx17_return.cc:
	Likewise.
	* testsuite/23_containers/list/cons/deduction.cc: Likewise.
	* testsuite/23_containers/forward_list/modifiers/emplace_cxx17_return.cc:
	Likewise.
	* testsuite/23_containers/forward_list/cons/deduction.cc: Likewise.
	* testsuite/23_containers/unordered_set/allocator/ext_ptr.cc: Likewise.
	* testsuite/23_containers/vector/modifiers/emplace/cxx17_return.cc:
	Likewise.
	* testsuite/23_containers/vector/cons/deduction.cc: Likewise.
	* testsuite/23_containers/vector/bool/emplace_cxx17_return.cc:
	Likewise.
	* testsuite/21_strings/basic_string/cons/char/9.cc: Likewise.
	* testsuite/21_strings/basic_string/cons/char/deduction.cc: Likewise.
	* testsuite/21_strings/basic_string/cons/char/79162.cc: Likewise.
	* testsuite/21_strings/basic_string/cons/wchar_t/9.cc: Likewise.
	* testsuite/21_strings/basic_string/cons/wchar_t/deduction.cc:
	Likewise.
	* testsuite/21_strings/basic_string/cons/wchar_t/79162.cc: Likewise.
	* testsuite/21_strings/basic_string_view/modifiers/swap/char/1.cc:
	Likewise.
	* testsuite/21_strings/basic_string_view/modifiers/swap/wchar_t/1.cc:
	Likewise.
	* testsuite/21_strings/basic_string_view/operations/compare/char/2.cc:
	Likewise.
	* testsuite/21_strings/basic_string_view/operations/compare/char/70483.cc:
	Likewise.
	* testsuite/21_strings/basic_string_view/operations/compare/wchar_t/2.cc:
	Likewise.
	* testsuite/21_strings/char_traits/requirements/constexpr_functions_c++17.cc:
	Likewise.

From-SVN: r252826

From-SVN: r243994