2021-02-24  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/99261
	* src/c++17/floating_to_chars.cc (sprintf_ld): Add extra args
	before value to be printed.

2021-02-24  Patrick Palka  <ppalka@redhat.com>

	* src/c++17/floating_to_chars.cc (__floating_to_chars_precision):
	Relax the condition that guards the printf code path to accept
	F128_type as well as long double.

2021-02-24  Cassio Neri  <cassio.neri@gmail.com>

	* include/std/chrono (year_month_day_last:day): New
	implementation.

2021-02-24  Cassio Neri  <cassio.neri@gmail.com>

	* include/std/chrono (year::is_leap): New implementation.
	* testsuite/std/time/year/2.cc: New test.

2021-02-24  Cassio Neri  <cassio.neri@gmail.com>

	* include/std/chrono (year_month_day::_M_days_since_epoch):
	New implementation.
	* testsuite/std/time/year_month_day/4.cc: New test.

2021-02-24  Cassio Neri  <cassio.neri@gmail.com>

	* include/std/chrono (year_month_day::_S_from_days): New
	implementation.
	* testsuite/std/time/year_month_day/3.cc: New test.

2021-02-24  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/98384
	* testsuite/20_util/to_chars/long_double.cc: Include <optional>.
	(test01): Simplify verifying the nearby values by using a
	2-iteration loop and a dedicated output buffer to check that the
	nearby values are different.  Factor out the printf-based
	verification into a local function, and check that the leading
	hex digits agree before comparing to the output of printf.  Also
	verify the output by round-tripping it through from_chars.

2021-02-24  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/98389
	* config/abi/pre/gnu.ver (GLIBCXX_3.4.29): Do not match to_chars
	symbols for long double arguments mangled as 'g'.
	* config/os/gnu-linux/ldbl-extra.ver: Likewise.
	* config/os/gnu-linux/ldbl-ieee128-extra.ver: Likewise.
	* src/c++17/Makefile.am [GLIBCXX_LDBL_ALT128_COMPAT_TRUE]:
	Use -mabi=ibmlongdouble for floating_to_chars.cc.
	* src/c++17/Makefile.in: Regenerate.
	* src/c++17/floating_to_chars.cc (floating_type_traits_binary128):
	New type defining type traits of IEEE binary128 format.
	(floating_type_traits<__float128>): Define specialization.
	(floating_type_traits<long double>): Define in terms of
	floating_type_traits_binary128 when appropriate.
	(floating_to_shortest_scientific): Handle __float128.
	(sprintf_ld): New function template for printing a long double
	or __ieee128 value using sprintf.
	(__floating_to_chars_shortest, __floating_to_chars_precision):
	Use sprintf_ld.
	(to_chars): Define overloads for __float128.

2021-02-24  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/17_intro/names.cc: Undefine 'u' on powerpc*-linux*.

2021-02-23  Martin Sebor  <msebor@redhat.com>

	PR c++/99074
	* libsupc++/dyncast.cc (__dynamic_cast): Return null when
	first argument is null.

2021-02-23  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/99181
	* testsuite/21_strings/char_traits/requirements/char/99181.cc: New
	test.

2021-02-23  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/99181
	* include/bits/char_traits.h (char_traits<char>::compare): For
	constexpr evaluation don't call
	__gnu_cxx::char_traits<char_type>::compare but do the comparison loop
	directly.

2021-02-23  Jakub Jelinek  <jakub@redhat.com>

	PR libstdc++/97549
	* include/pstl/parallel_backend_serial.h: Remove __pstl::__par_backend.

2021-02-23  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/98384
	* src/c++17/floating_to_chars.cc (get_ieee_repr): Extract
	the high- and low-order parts from an IBM long double value
	in an endian-agnostic way.

2021-02-19  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_wait.h (__thread_relax()): Call
	__thread_yield() not __gthread_yield().

2021-02-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/atomic_wait.h (__thread_yield()): Check
	_GLIBCXX_HAS_GTHREADS before using __gthread_yield.
	(__thread_relax()): Use __thread_yield() instead of repeating
	the preprocessor checks for __gthread_yield.

2021-02-15  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/mutex (once_flag::_M_activate()): Add explicit
	return statement for passive case.
	(once_flag::_M_finish(bool)): Use reserved name for parameter.

2021-02-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/99096
	* testsuite/util/testsuite_fs.h: Always include <unistd.h>.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/88881
	* src/c++17/fs_ops.cc (fs::symlink_status): Re-enable workaround.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/status_cxx2014.xml: Document implementation
	specific properties of std::experimental::filesystem::rename.
	* doc/xml/manual/status_cxx2017.xml: Document implementation
	specific properties of std::filesystem::rename.
	* doc/html/*: Regenerate.
	* src/c++17/fs_ops.cc (fs::rename): Implement correct behaviour
	for directories on Windows.
	* src/filesystem/ops-common.h (__gnu_posix::rename): Use
	MoveFileExW on Windows.
	* testsuite/27_io/filesystem/operations/rename.cc: New test.
	* testsuite/experimental/filesystem/operations/rename.cc: New test.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/util/testsuite_fs.h (nonexistent_path): Add
	random number to the path.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/experimental/internet (address_v6::to_string): Include
	scope ID in string.
	* testsuite/experimental/net/internet/address/v6/members.cc:
	Test to_string() results.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/experimental/internet (address_v6::any): Avoid using
	memcpy in constexpr function.
	(address_v6::loopback): Likewise.
	(make_address_v6): Fix missing return statements on error paths.
	* include/experimental/io_context: Avoid -Wdangling-else
	warning.
	* testsuite/experimental/net/internet/address/v4/members.cc:
	Remove unused variables.
	* testsuite/experimental/net/internet/address/v6/members.cc:
	New test.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/bits/shared_ptr_base.h (__shared_ptr::_M_get_deleter):
	Add unused attribute to parameter.
	* src/c++11/shared_ptr.cc (_Sp_make_shared_tag::_S_eq):
	Likewise.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/27_io/basic_ostream/emit/1.cc: Expect test to fail
	if -fno-rtti is used.
	* testsuite/30_threads/async/forced_unwind.cc: Expect test
	to abort if -fno-rtti is used.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/util/testsuite_allocator.h (memory_resource):
	Remove requirement for RTTI and exceptions to be enabled.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/27_io/basic_istringstream/rdbuf/char/2832.cc: Use
	static_cast when RTTI is disabled.
	* testsuite/27_io/basic_istringstream/rdbuf/wchar_t/2832.cc:
	Likewise.
	* testsuite/27_io/basic_ostringstream/rdbuf/char/2832.cc:
	Likewise.
	* testsuite/27_io/basic_ostringstream/rdbuf/wchar_t/2832.cc:
	Likewise.
	* testsuite/27_io/basic_stringstream/str/char/2.cc:
	Likewise.
	* testsuite/27_io/basic_stringstream/str/wchar_t/2.cc:
	Likewise.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/ostream (__syncbuf_base::_S_get): Mark parameter
	as unused and only use dynamic_cast when RTTI is enabled.

2021-02-12  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/99077
	* src/c++11/cxx11-ios_failure.cc (__ios_failure(const char*, int)):
	Change int parameter to error_code, to match std::ios_failure.
	(__throw_ios_failure(const char*, int)): Construct error_code
	from int parameter.

2021-02-11  Jonathan Wakely  <jwakely@redhat.com>

	* libsupc++/eh_ptr.cc (_GLIBCXX_EH_PTR_RELOPS_COMPAT): Define
	new macro.
	* libsupc++/exception_ptr.h (_GLIBCXX_EH_PTR_USED): Check new
	macro instead of _GLIBCXX_EH_PTR_COMPAT.
	(operator==): Likewise.

2021-02-11  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/99058
	* doc/xml/manual/status_cxx2011.xml: Document when support
	became stable.
	* doc/xml/manual/status_cxx2014.xml: Likewise.
	* doc/xml/manual/status_cxx2017.xml: Likewise.
	* doc/html/manual/status.html: Regenerate.

2021-02-10  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/88881
	* src/c++17/fs_ops.cc (fs::status): Re-enable workaround.

2021-02-10  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++17/fs_ops.cc (fs::create_hard_link, fs::equivalent)
	(fs::remove): Use std::system_category() for error codes from
	GetLastError().
	* src/filesystem/ops.cc (fs::create_hard_link, fs::remove):
	Likewise.

2021-02-10  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/27_io/filesystem/operations/proximate.cc: Fix typo
	in __MINGW32__ macro name.
	* testsuite/27_io/filesystem/path/compare/lwg2936.cc: Likewise.
	* testsuite/27_io/filesystem/path/generation/proximate.cc:
	Likewise.
	* testsuite/27_io/filesystem/path/generation/relative.cc:
	Likewise.
	* testsuite/util/testsuite_fs.h: Likewise.

2021-02-09  François Dumont  <fdumont@gcc.gnu.org>

	* include/bits/stl_tree.h
	(__has_is_transparent, __has_is_transparent_t): Move...
	* include/bits/stl_function.h: ...here.
	* include/bits/hashtable_policy.h (_Hash_code_base<>::_M_hash_code_tr): New..
	(_Hashtable_base<>::_M_equals_tr): New.
	* include/bits/hashtable.h (_Hashtable<>::_M_find_tr, _Hashtable<>::_M_count_tr,
	_Hashtable<>::_M_equal_range_tr): New member function templates to perform
	heterogeneous lookup.
	(_Hashtable<>::_M_find_before_node_tr): New.
	(_Hashtable<>::_M_find_node_tr): New.
	* include/bits/unordered_map.h (unordered_map::find<>, unordered_map::count<>,
	unordered_map::contains<>, unordered_map::equal_range<>): New member function
	templates to perform heterogeneous lookup.
	(unordered_multimap::find<>, unordered_multimap::count<>,
	unordered_multimap::contains<>, unordered_multimap::equal_range<>): Likewise.
	* include/bits/unordered_set.h  (unordered_set::find<>, unordered_set::count<>,
	unordered_set::contains<>, unordered_set::equal_range<>): Likewise.
	(unordered_multiset::find<>, unordered_multiset::count<>,
	unordered_multiset::contains<>, unordered_multiset::equal_range<>): Likewise.
	* include/debug/unordered_map
	(unordered_map::find<>, unordered_map::equal_range<>): Likewise.
	(unordered_multimap::find<>, unordered_multimap::equal_range<>): Likewise.
	* include/debug/unordered_set
	(unordered_set::find<>, unordered_set::equal_range<>): Likewise.
	(unordered_multiset::find<>, unordered_multiset::equal_range<>): Likewise.
	* testsuite/23_containers/unordered_map/operations/1.cc: New test.
	* testsuite/23_containers/unordered_multimap/operations/1.cc: New test.
	* testsuite/23_containers/unordered_multiset/operations/1.cc: New test.
	* testsuite/23_containers/unordered_set/operations/1.cc: New test.

2021-02-09  François Dumont  <fdumont@gcc.gnu.org>

	* include/bits/stl_deque.h
	(std::operator-(deque::iterator, deque::iterator)): Replace if/then with
	a null pointer test.

2021-02-09  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/27_io/filesystem/operations/remove_all.cc: Remove
	test directory after making it writable again.
	* testsuite/experimental/filesystem/operations/remove_all.cc:
	Likewise.

2021-02-09  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/99021
	* include/std/coroutine (coroutine_handle<P>::from_address): Add
	noexcept.

2021-02-09  Vladimir Vishnevsky  <vv.os.swe@gmail.com>

	* include/ext/stdio_sync_filebuf.h: Remove unused <unistd.h>.
	* src/c++17/fs_ops.cc (fs::permissions): Qualify mode_t.

2021-02-09  Jakub Jelinek  <jakub@redhat.com>

	PR middle-end/98465
	* include/bits/basic_string.tcc (basic_string::_M_replace): When __s
	points to the characters moved by earlier _S_move, compute the source
	address using expression based on the __p pointer rather than __s
	pointer.

2021-02-03  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/19_diagnostics/error_code/operators/not_equal.cc:
	Add comparison with same category and different values.
	* testsuite/19_diagnostics/error_code/operators/less.cc:
	Likewise. Fix comparison involving different categories.
	* testsuite/19_diagnostics/error_code/operators/three_way.cc:
	Likewise.
	* testsuite/19_diagnostics/error_condition/operators/less.cc:
	Add comment.
	* testsuite/19_diagnostics/error_condition/operators/three_way.cc:
	Likewise.

2021-02-03  yaozhongxiao  <yaozhongxiao@linux.alibaba.com>

	* include/experimental/bits/simd_neon.h: Replace repeated vpadd
	calls with a single vaddv for aarch64.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* testsuite/Makefile.am: Warn about the workaround. Add
	-fno-tree-vrp to CXXFLAGS passed to the check_simd script.
	Improve initial user feedback from make check-simd.
	* testsuite/Makefile.in: Regenerated.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* include/experimental/bits/simd.h: Add __detail::_Minimum and
	__detail::_Maximum to use them as _BinaryOperation to _S_reduce.
	Add hmin and hmax overloads for simd and const_where_expression.
	* include/experimental/bits/simd_scalar.h
	(_SimdImplScalar::_S_reduce): Make unused _BinaryOperation
	parameter const-ref to allow calling _S_reduce with an rvalue.
	* testsuite/experimental/simd/tests/reductions.cc: Add tests for
	hmin and hmax. Since the compiler statically determined that all
	tests pass, repeat the test after a call to make_value_unknown.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* testsuite/experimental/simd/tests/bits/verify.h (verify): Add
	instruction pointer data member. Ensure that the `if (m_failed)`
	branch is always inlined into the calling code. The body of the
	conditional can still be a function call. Move the get_ip call
	into the verify ctor to simplify the ctor calls.
	(COMPARE): Don't mention the use of all_of for reduction of a
	simd_mask. It only distracts from the real issue.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* testsuite/experimental/simd/driver.sh: Abstract reading test
	options into read_src_option function. Read skip, only,
	expensive, and xfail via read_src_option. Add timeout and
	timeout-factor options and adjust timeout variable accordingly.
	* testsuite/experimental/simd/tests/loadstore.cc: Set
	timeout-factor 2.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* testsuite/experimental/simd/driver.sh: When handling the pipe
	to log (and on verbose to stdout) count the lines. If it exceeds
	1000 log the issue and exit 125, which is then handled as a
	failure.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* testsuite/experimental/simd/tests/hypot3_fma.cc: Add skip:
	markup for long double on powerpc64*.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* include/experimental/bits/simd.h: Add __have_power10vec
	conditional on _ARCH_PWR10.
	* include/experimental/bits/simd_builtin.h: Forward declare
	_MaskImplPpc and use it as _MaskImpl when __ALTIVEC__ is
	defined.
	(_MaskImplBuiltin::_S_some_of): Call _S_popcount from the
	_SuperImpl for optimizations and correctness.
	* include/experimental/bits/simd_ppc.h: Add _MaskImplPpc.
	(_MaskImplPpc::_S_popcount): Implement via vec_cntm for POWER10.
	Otherwise, for >=int use -vec_sums divided by a sizeof factor.
	For <int use -vec_sums(vec_sum4s(...)) to sum all mask entries.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* testsuite/experimental/simd/driver.sh: Remove executable on
	SIGINT. Process compiler and test executable output: In verbose
	mode print messages immediately, limited to 1000 lines and
	breaking long lines to below $COLUMNS (or 1024 if not set).
	Communicating the exit status of the compiler / test with the
	necessary pipe is done via a message through stdout/-in.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* testsuite/Makefile.am: Ensure .simd.summary is empty before
	collecting a new summary.
	* testsuite/Makefile.in: Regenerate.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* testsuite/experimental/simd/generate_makefile.sh: Use
	different variables internally than documented for user
	overrides. This makes internal append/prepend work as intended.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* testsuite/experimental/simd/driver.sh (verify_test): Print
	test output on run xfail. Do not repeat lines from the log that
	were already printed on stdout.
	(test_selector): Make the compiler flags pattern usable as a
	substring selector.
	(toplevel): Trap on SIGINT and remove the log and sum files.
	Call timout with --foreground to quickly terminate on SIGINT.
	* testsuite/experimental/simd/generate_makefile.sh: Simplify run
	targets via target patterns. Default DRIVEROPTS to -v for run
	targets. Remove log and sum files after completion of the run
	target (so that it's always recompiled).
	Place help text into text file for reasonable 'make help'
	performance.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* include/experimental/bits/simd.h: Remove unnecessary static
	assertion. Allow sizeof(8) integer __intrinsic_type to enable
	the necessary mask type.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* include/experimental/bits/simd.h: Let __intrinsic_type<long
	double, N> be valid if sizeof(long double) == sizeof(double) and
	use a __vector double as member type.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* include/experimental/bits/simd.h (__is_intrinsic_type): New
	internal type trait. Alias for __is_vector_type on x86.
	(_VectorTraitsImpl): Enable for __intrinsic_type in addition for
	__vector_type.
	(__intrin_bitcast): Allow casting to & from vector & intrinsic
	types.
	(__intrinsic_type): Explicitly specialize for NEON intrinsic
	vector types.

2021-02-03  Matthias Kretz  <kretz@kde.org>

	* testsuite/experimental/simd/driver.sh: Implement skip, only,
	expensive, and xfail markers. They can select on type, ABI tag
	subset number, target-triplet, and compiler flags.
	* testsuite/experimental/simd/generate_makefile.sh: The summary
	now includes lines for unexpected passes and expected failures.
	If the skip or only markers are only conditional on the type, do
	not generate rules for those types.
	* testsuite/experimental/simd/tests/abs.cc: Mark test expensive
	for ABI tag subsets 1-9.
	* testsuite/experimental/simd/tests/algorithms.cc: Ditto.
	* testsuite/experimental/simd/tests/broadcast.cc: Ditto.
	* testsuite/experimental/simd/tests/casts.cc: Ditto.
	* testsuite/experimental/simd/tests/generator.cc: Ditto.
	* testsuite/experimental/simd/tests/integer_operators.cc: Ditto.
	* testsuite/experimental/simd/tests/loadstore.cc: Ditto.
	* testsuite/experimental/simd/tests/mask_broadcast.cc: Ditto.
	* testsuite/experimental/simd/tests/mask_conversions.cc: Ditto.
	* testsuite/experimental/simd/tests/mask_implicit_cvt.cc: Ditto.
	* testsuite/experimental/simd/tests/mask_loadstore.cc: Ditto.
	* testsuite/experimental/simd/tests/mask_operator_cvt.cc: Ditto.
	* testsuite/experimental/simd/tests/mask_operators.cc: Ditto.
	* testsuite/experimental/simd/tests/mask_reductions.cc: Ditto.
	* testsuite/experimental/simd/tests/operator_cvt.cc: Ditto.
	* testsuite/experimental/simd/tests/operators.cc: Ditto.
	* testsuite/experimental/simd/tests/reductions.cc: Ditto.
	* testsuite/experimental/simd/tests/simd.cc: Ditto.
	* testsuite/experimental/simd/tests/split_concat.cc: Ditto.
	* testsuite/experimental/simd/tests/splits.cc: Ditto.
	* testsuite/experimental/simd/tests/where.cc: Ditto.
	* testsuite/experimental/simd/tests/fpclassify.cc: Ditto. In
	addition replace "test only floattypes" marker by unconditional
	"float|double|ldouble" only marker.
	* testsuite/experimental/simd/tests/frexp.cc: Ditto.
	* testsuite/experimental/simd/tests/hypot3_fma.cc: Ditto.
	* testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
	Ditto.
	* testsuite/experimental/simd/tests/logarithm.cc: Ditto.
	* testsuite/experimental/simd/tests/math_1arg.cc: Ditto.
	* testsuite/experimental/simd/tests/math_2arg.cc: Ditto.
	* testsuite/experimental/simd/tests/remqo.cc: Ditto.
	* testsuite/experimental/simd/tests/trigonometric.cc: Ditto.
	* testsuite/experimental/simd/tests/trunc_ceil_floor.cc: Ditto.
	* testsuite/experimental/simd/tests/sincos.cc: Ditto. In
	addition, xfail on run because the reference data is missing.

2021-02-02  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/status_cxx2011.xml: Remove stray table cell.
	* doc/xml/manual/status_cxx2014.xml: Likewise.
	* doc/xml/manual/status_cxx2017.xml: Likewise.
	* doc/html/manual/status.html: Regenerate.

2021-02-01  François Dumont  <fdumont@gcc.gnu.org>

	PR libstdc++/70303
	* include/bits/stl_deque.h (std::deque<>::operator-(iterator, iterator)):
	Return 0 if both iterators are value-initialized.
	* testsuite/23_containers/deque/70303.cc: New test.
	* testsuite/23_containers/vector/70303.cc: New test.

2021-02-01  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/status_cxx2011.xml: Update std::call_once
	status.
	* doc/xml/manual/status_cxx2014.xml: Likewise.
	* doc/xml/manual/status_cxx2017.xml: Likewise. Update
	std::from_chars and std::to_chars status. Fix formatting.
	* doc/html/manual/status.html: Regenerate.

2021-01-28  Jonathan Wakely  <jwakely@redhat.com>

	* include/experimental/bits/numeric_traits.h: Update copyright
	dates.
	* include/experimental/bits/simd.h: Likewise.
	* include/experimental/bits/simd_builtin.h: Likewise.
	* include/experimental/bits/simd_converter.h: Likewise.
	* include/experimental/bits/simd_detail.h: Likewise.
	* include/experimental/bits/simd_fixed_size.h: Likewise.
	* include/experimental/bits/simd_math.h: Likewise.
	* include/experimental/bits/simd_neon.h: Likewise.
	* include/experimental/bits/simd_ppc.h: Likewise.
	* include/experimental/bits/simd_scalar.h: Likewise.
	* include/experimental/bits/simd_x86.h: Likewise.
	* include/experimental/bits/simd_x86_conversions.h: Likewise.
	* include/experimental/simd: Likewise.
	* testsuite/experimental/simd/*: Likewise.

2021-01-27  Jonathan Wakely  <jwakely@redhat.com>

	* doc/xml/manual/status_cxx2017.xml: Replace invalid entity.
	* doc/html/*: Regenerate.

2021-01-27  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/experimental/simd/generate_makefile.sh: Use printf
	instead of echo when printing escape characters.

2021-01-27  Matthias Kretz  <kretz@kde.org>

	* scripts/check_simd: New file. This script is called from the
	the check-simd target. It determines a set of compiler flags and
	simulator setups for calling generate_makefile.sh and passes the
	information back to the check-simd target, which recurses to the
	generated Makefiles.
	* scripts/create_testsuite_files: Remove files below simd/tests/
	from testsuite_files and place them in testsuite_files_simd.
	* testsuite/Makefile.am: Add testsuite_files_simd. Add
	check-simd target.
	* testsuite/Makefile.in: Regenerate.
	* testsuite/experimental/simd/driver.sh: New file. This script
	compiles and runs a given simd test, logging its output and
	status. It uses the timeout command to implement compile and
	test timeouts.
	* testsuite/experimental/simd/generate_makefile.sh: New file.
	This script generates a Makefile which uses driver.sh to compile
	and run the tests and collect the logs into a single log file.
	* testsuite/experimental/simd/tests/abs.cc: New file. Tests
	abs(simd).
	* testsuite/experimental/simd/tests/algorithms.cc: New file.
	Tests min/max(simd, simd).
	* testsuite/experimental/simd/tests/bits/conversions.h: New
	file. Contains functions to support tests involving conversions.
	* testsuite/experimental/simd/tests/bits/make_vec.h: New file.
	Support functions make_mask and make_vec.
	* testsuite/experimental/simd/tests/bits/mathreference.h: New
	file. Support functions to supply precomputed math function
	reference data.
	* testsuite/experimental/simd/tests/bits/metahelpers.h: New
	file. Support code for SFINAE testing.
	* testsuite/experimental/simd/tests/bits/simd_view.h: New file.
	* testsuite/experimental/simd/tests/bits/test_values.h: New
	file. Test functions to easily drive a test with simd objects
	initialized from a given list of values and a range of random
	values.
	* testsuite/experimental/simd/tests/bits/ulp.h: New file.
	Support code to determine the ULP distance of simd objects.
	* testsuite/experimental/simd/tests/bits/verify.h: New file.
	Test framework for COMPARE'ing simd objects and instantiating
	the test templates with value_type and ABI tag.
	* testsuite/experimental/simd/tests/broadcast.cc: New file. Test
	simd broadcasts.
	* testsuite/experimental/simd/tests/casts.cc: New file. Test
	simd casts.
	* testsuite/experimental/simd/tests/fpclassify.cc: New file.
	Test floating-point classification functions.
	* testsuite/experimental/simd/tests/frexp.cc: New file. Test
	frexp(simd).
	* testsuite/experimental/simd/tests/generator.cc: New file. Test
	simd generator constructor.
	* testsuite/experimental/simd/tests/hypot3_fma.cc: New file.
	Test 3-arg hypot(simd,simd,simd) and fma(simd,simd,sim).
	* testsuite/experimental/simd/tests/integer_operators.cc: New
	file. Test integer operators.
	* testsuite/experimental/simd/tests/ldexp_scalbn_scalbln_modf.cc:
	New file. Test ldexp(simd), scalbn(simd), scalbln(simd), and
	modf(simd).
	* testsuite/experimental/simd/tests/loadstore.cc: New file. Test
	(converting) simd loads and stores.
	* testsuite/experimental/simd/tests/logarithm.cc: New file. Test
	log*(simd).
	* testsuite/experimental/simd/tests/mask_broadcast.cc: New file.
	Test simd_mask broadcasts.
	* testsuite/experimental/simd/tests/mask_conversions.cc: New
	file. Test simd_mask conversions.
	* testsuite/experimental/simd/tests/mask_implicit_cvt.cc: New
	file. Test simd_mask implicit conversions.
	* testsuite/experimental/simd/tests/mask_loadstore.cc: New file.
	Test simd_mask loads and stores.
	* testsuite/experimental/simd/tests/mask_operator_cvt.cc: New
	file. Test simd_mask operators convert as specified.
	* testsuite/experimental/simd/tests/mask_operators.cc: New file.
	Test simd_mask compares, subscripts, and negation.
	* testsuite/experimental/simd/tests/mask_reductions.cc: New
	file. Test simd_mask reductions.
	* testsuite/experimental/simd/tests/math_1arg.cc: New file. Test
	1-arg math functions on simd.
	* testsuite/experimental/simd/tests/math_2arg.cc: New file. Test
	2-arg math functions on simd.
	* testsuite/experimental/simd/tests/operator_cvt.cc: New file.
	Test implicit conversions on simd binary operators behave as
	specified.
	* testsuite/experimental/simd/tests/operators.cc: New file. Test
	simd compares, subscripts, not, unary minus, plus, minus,
	multiplies, divides, increment, and decrement.
	* testsuite/experimental/simd/tests/reductions.cc: New file.
	Test reduce(simd).
	* testsuite/experimental/simd/tests/remqo.cc: New file. Test
	remqo(simd).
	* testsuite/experimental/simd/tests/simd.cc: New file. Basic
	sanity checks of simd types.
	* testsuite/experimental/simd/tests/sincos.cc: New file. Test
	sin(simd) and cos(simd).
	* testsuite/experimental/simd/tests/split_concat.cc: New file.
	Test split(simd) and concat(simd, simd).
	* testsuite/experimental/simd/tests/splits.cc: New file. Test
	split(simd_mask).
	* testsuite/experimental/simd/tests/trigonometric.cc: New file.
	Test remaining trigonometric functions on simd.
	* testsuite/experimental/simd/tests/trunc_ceil_floor.cc: New
	file. Test trunc(simd), ceil(simd), and floor(simd).
	* testsuite/experimental/simd/tests/where.cc: New file. Test
	masked operations using where.

2021-01-27  Matthias Kretz  <kretz@kde.org>

	* doc/xml/manual/status_cxx2017.xml: Add implementation status
	of the Parallelism TS 2. Document implementation-defined types
	and behavior.
	* include/Makefile.am: Add new headers.
	* include/Makefile.in: Regenerate.
	* include/experimental/simd: New file. New header for
	Parallelism TS 2.
	* include/experimental/bits/numeric_traits.h: New file.
	Implementation of P1841R1 using internal naming. Addition of
	missing IEC559 functionality query.
	* include/experimental/bits/simd.h: New file. Definition of the
	public simd interfaces and general implementation helpers.
	* include/experimental/bits/simd_builtin.h: New file.
	Implementation of the _VecBuiltin simd_abi.
	* include/experimental/bits/simd_converter.h: New file. Generic
	simd conversions.
	* include/experimental/bits/simd_detail.h: New file. Internal
	macros for the simd implementation.
	* include/experimental/bits/simd_fixed_size.h: New file. Simd
	fixed_size ABI specific implementations.
	* include/experimental/bits/simd_math.h: New file. Math
	overloads for simd.
	* include/experimental/bits/simd_neon.h: New file. Simd NEON
	specific implementations.
	* include/experimental/bits/simd_ppc.h: New file. Implement bit
	shifts to avoid invalid results for integral types smaller than
	int.
	* include/experimental/bits/simd_scalar.h: New file. Simd scalar
	ABI specific implementations.
	* include/experimental/bits/simd_x86.h: New file. Simd x86
	specific implementations.
	* include/experimental/bits/simd_x86_conversions.h: New file.
	x86 specific conversion optimizations. The conversion patterns
	work around missing conversion patterns in the compiler and
	should be removed as soon as PR85048 is resolved.
	* testsuite/experimental/simd/standard_abi_usable.cc: New file.
	Test that all (not all fixed_size<N>, though) standard simd and
	simd_mask types are usable.
	* testsuite/experimental/simd/standard_abi_usable_2.cc: New
	file. As above but with -ffast-math.
	* testsuite/libstdc++-dg/conformance.exp: Don't build simd tests
	from the standard test loop. Instead use
	check_vect_support_and_set_flags to build simd tests with the
	relevant machine flags.

2021-01-27  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/66414
	* include/bits/string_view.tcc
	(basic_string_view::find(const CharT*, size_type, size_type)):
	Optimize.

2021-01-27  Paul Fee  <paul.f.fee@gmail.com>

	* include/bits/basic_string.h (basic_string::contains): New
	member functions.
	* include/std/string_view (basic_string_view::contains):
	Likewise.
	* include/std/version (__cpp_lib_string_contains): Define.
	* testsuite/21_strings/basic_string/operations/starts_with/char/1.cc:
	Remove trailing whitespace.
	* testsuite/21_strings/basic_string/operations/starts_with/wchar_t/1.cc:
	Likewise.
	* testsuite/21_strings/basic_string/operations/contains/char/1.cc: New test.
	* testsuite/21_strings/basic_string/operations/contains/wchar_t/1.cc: New test.
	* testsuite/21_strings/basic_string_view/operations/contains/char/1.cc: New test.
	* testsuite/21_strings/basic_string_view/operations/contains/char/2.cc: New test.
	* testsuite/21_strings/basic_string_view/operations/contains/wchar_t/1.cc: New test.

2021-01-21  Jonathan Wakely  <jwakely@redhat.com>

	* src/c++17/Makefile.in: Regenerate.

2021-01-20  David Edelsohn  <dje.gcc@gmail.com>

	* config/os/aix/ctype_inline.h (bool ctype<char>:: is): Cast
	_OBJ_DATA subscript to unsigned char. Add _THREAD_SAFE access to
	__lc_type.
	(const char* ctype<char>:: is): Same.

2021-01-18  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/98725
	* testsuite/20_util/unique_ptr/io/lwg2948.cc:  Do not try to
	write to a wide character stream if wide character support is
	disabled in the library.

2021-01-18  Jonathan Wakely  <jwakely@redhat.com>

	* testsuite/27_io/basic_stringstream/cons/char/1.cc: Use
	stringbuf not wstringbuf.

2021-01-18  Jakub Jelinek  <jakub@redhat.com>

	PR debug/98708
	* src/c++11/Makefile.am (cxx11-ios_failure-lt.s, cxx11-ios_failure.s):
	Compile with -gno-as-loc-support.
	* src/c++11/Makefile.in: Regenerated.

2021-01-16  H.J. Lu  <hjl.tools@gmail.com>

	* testsuite/29_atomics/atomic_flag/test_and_set/explicit-hle.cc:
	Add -fcf-protection=none to -march=i486.

2021-01-14  François Dumont  <fdumont@gcc.gnu.org>

	* testsuite/23_containers/deque/debug/98466.cc: Make it pre-C++11
	compliant.

2021-01-14  Alexandre Oliva  <oliva@adacore.com>

	* testsuite/30_threads/future/members/poll.cc: Calibrate
	iteration count.

2021-01-14  François Dumont  <fdumont@gcc.gnu.org>

	PR libstdc++/98466
	* include/bits/hashtable_policy.h (_Node_iterator_base()): Set _M_cur to nullptr.
	(_Node_iterator()): Make default.
	(_Node_const_iterator()): Make default.
	* include/debug/macros.h (__glibcxx_check_erae_range_after): Add _M_singular
	iterator checks.
	* include/debug/safe_iterator.h
	(_GLIBCXX_DEBUG_VERIFY_OPERANDS): Accept if both iterator are value initialized.
	* include/debug/safe_local_iterator.h (_GLIBCXX_DEBUG_VERIFY_OPERANDS):
	Likewise.
	* include/debug/safe_iterator.tcc (_Safe_iterator<>::_M_valid_range): Add
	_M_singular checks on input iterators.
	* src/c++11/debug.cc (_Safe_iterator_base::_M_can_compare): Remove _M_singular
	checks.
	* testsuite/23_containers/deque/debug/98466.cc: New test.
	* testsuite/23_containers/unordered_map/debug/98466.cc: New test.

2021-01-14  Jonathan Wakely  <jwakely@redhat.com>

	PR libstdc++/98471
	* include/bits/fs_path.h (__throw_conversion_error): New
	function to throw or abort on character conversion errors.
	(__wstr_from_utf8): Move definition after filesystem_error has
	been defined. Use __throw_conversion_error.
	(path::_S_convert<_EcharT>): Use __throw_conversion_error.
	(path::_S_str_convert<_CharT, _Traits, _Allocator>): Likewise.
	(path::u8string): Likewise.

2021-01-14  Jonathan Wakely  <jwakely@redhat.com>

	* include/std/barrier: Update copyright years. Fix whitespace.
	* include/std/version: Fix whitespace.
	* testsuite/30_threads/barrier/1.cc: Update copyright years.
	* testsuite/30_threads/barrier/2.cc: Likewise.
	* testsuite/30_threads/barrier/arrive.cc: Likewise.
	* testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
	* testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
	* testsuite/30_threads/barrier/completion.cc: Likewise.

2021-01-13  Jonathan Wakely  <jwakely@redhat.com>

	* doc/doxygen/user.cfg.in (INPUT): Remove include/debug/array.

2021-01-10  David Edelsohn  <dje.gcc@gmail.com>

	PR libstdc++/98613
	* testsuite/ext/vstring/cons/moveable.cc: Suppress false positive
	warning.
	* testsuite/ext/vstring/modifiers/assign/move_assign.cc: Same.

2021-01-08  Olivier Hainque  <hainque@adacore.com>

	* testsuite/20_util/bind/ref_neg.cc: Tweak the
	dg-prune-output regex for out-of-build-tree contexts.

2021-01-07  Thomas Rodgers  <trodgers@redhat.com>

	* doc/doxygen/user.cfg.in: Add new header.
	* include/Makefile.am (std_headers): likewise.
	* include/Makefile.in: Regenerate.
	* include/precompiled/stdc++.h: Add new header.
	* include/std/barrier: New file.
	* include/std/version: Add __cpp_lib_barrier feature test macro.
	* testsuite/30_threads/barrier/1.cc: New test.
	* testsuite/30_threads/barrier/2.cc: Likewise.
	* testsuite/30_threads/barrier/arrive_and_drop.cc: Likewise.
	* testsuite/30_threads/barrier/arrive_and_wait.cc: Likewise.
	* testsuite/30_threads/barrier/arrive.cc: Likewise.
	* testsuite/30_threads/barrier/completion.cc: Likewise.

2021-01-07  Patrick Palka  <ppalka@redhat.com>

	PR libstdc++/98384
	* testsuite/20_util/to_chars/long_double.cc: Use nexttowardl
	instead of the non-standard nextupl and nextdownl.

2021-01-05  Samuel Thibault  <samuel.thibault@ens-lyon.org>

	* configure: Re-generate.

2021-01-05  Ed Smith-Rowland  <3dw4rd@verizon.net>

	* include/precompiled/stdc++.h: Add <source_location> to C++20 section.

2021-01-01  Jakub Jelinek  <jakub@redhat.com>

	* ChangeLog-2020: Rotate ChangeLog.  New file.


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Copying and distribution of this file, with or without modification,
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