Switch std::valarray<T> memory allocation to use std::__new_allocator<T> to allocate and deallocate memory. This adds support for extended alignment types without needing to duplicate all the logic from __new_allocator::allocate and __new_allocator::dellocate. std::__new_allocator is used instead of std::allocator because we want to ensure that the memory is still allocated with operator new, so we don't want to use any possible program-defined specialization of std::allocator<T> which the user might have provided. To make using an allocator possible, __valarray_release_memory needs to become a function template so that it knows the type T. It also needs an additional parameter specifying the size of the allocation. This change doesn't cause an ABI change for types with fundamental alignment, because __new_allocator still uses the same operator delete function (or the sized version, which is ABI compatible) to free the memory. So if memory for a valarray is allocated in one translation unit and deallocated in another, and those TUs are compiled with different versions of GCC, we still get memory from the same operator new and release it with the same operator delete (or the compatibled sized version). For types with extended alignment this does potentially cause an ABI change on targets where the aligned version of operator delete doesn't just call free(p), but support for extended alignment types was previously just broken and had undefined behaviour. libstdc++-v3/ChangeLog: PR libstdc++/108951 * include/bits/valarray_array.h( __valarray_get_storage): Use std::__new_allocator. (__valarray_release_memory): Likewise. * include/std/valarray: Pass _M_size to __valarray_release_memory. * testsuite/26_numerics/valarray/108951.cc: New test. Reviewed-by: Tomasz Kamiński <tkaminsk@redhat.com>
Replace remaining uses of _GLIBCXX17_CONSTEXPR for constexpr-if, so that we always use constexpr-if in C++11 and C++14. Diagnostic pragmas are used to suppress diagnostics. libstdc++-v3/ChangeLog: * include/bits/char_traits.h (char_traits::assign): Use constexpr-if unconditionally for C++11 and C++14. * include/bits/locale_conv.h (__do_str_codecvt): Likewise. * include/bits/ostream.h (basic_ostream::_S_cast_flt): Likewise. * include/bits/random.tcc (shuffle_order_engine::operator()) (seed_seq::seed_seq(Iter, Iter)): Likewise. * include/bits/shared_ptr_base.h (_Sp_counted_base::_M_release): Likewise. * include/bits/stl_tree.h (_Rb_tree::_M_move_data): Likewise. * include/bits/uniform_int_dist.h (uniform_int_distribution::operator()): Likewise. * include/bits/valarray_array.h (__valarray_default_construct) (__valarray_fill_construct, __valarray_copy_construct) (__valarray_copy_construct, __valarray_destroy_elements): Likewise. * include/experimental/numeric (lcm): Likewise. * include/std/bit (__rotl, __rotr, __countl_zero, __countr_zero) (__popcount, __bit_ceil) Likewise.: * include/std/bitset (operator>>): Likewise. * include/std/charconv (__to_chars_8, __to_chars_i) (__from_chars_alnum_to_val, from_chars): Likewise. * include/tr2/dynamic_bitset (__dynamic_bitset_base): Likewise. * testsuite/26_numerics/random/pr60037-neg.cc: Adjust dg-error line number. Reviewed-by: Tomasz Kamiński <tkaminsk@redhat.com>
I've tried to build stage3 with -Wleading-whitespace=blanks -Wtrailing-whitespace=blank -Wno-error=leading-whitespace=blanks -Wno-error=trailing-whitespace=blank added to STRICT_WARN and that expectably resulted in about 2744 unique trailing whitespace warnings and 124837 leading whitespace warnings when excluding *.md files (which obviously is in big part a generator issue). Others from that are generator related, I think those need to be solved later. The following patch just fixes up the easy case (trailing whitespace), which could be easily automated: for i in `find . -name \*.h -o -name \*.cc -o -name \*.c | xargs grep -l '[ ]$' | grep -v testsuite/`; do sed -i -e 's/[ ]*$//' $i; done I've excluded files which I knew are obviously generated or go FE. Is there anything else we'd want to avoid the changes? Due to patch size, I've split it between gcc/ part and rest (include/, libiberty/, libgcc/, libcpp/, libstdc++-v3/; this part). 2024-10-24 Jakub Jelinek <jakub@redhat.com> include/ * dyn-string.h: Remove trailing whitespace. * libiberty.h: Likewise. * xregex.h: Likewise. * splay-tree.h: Likewise. * partition.h: Likewise. * plugin-api.h: Likewise. * demangle.h: Likewise. * vtv-change-permission.h: Likewise. * fibheap.h: Likewise. * hsa_ext_image.h: Likewise. * hashtab.h: Likewise. * libcollector.h: Likewise. * sort.h: Likewise. * symcat.h: Likewise. * hsa_ext_amd.h: Likewise. libcpp/ * directives.cc: Remove trailing whitespace. * mkdeps.cc: Likewise. * line-map.cc: Likewise. * internal.h: Likewise. * files.cc: Likewise. * init.cc: Likewise. * makeucnid.cc: Likewise. * system.h: Likewise. * include/line-map.h: Likewise. * include/symtab.h: Likewise. * include/cpplib.h: Likewise. * expr.cc: Likewise. * charset.cc: Likewise. * macro.cc: Likewise. * errors.cc: Likewise. * lex.cc: Likewise. * traditional.cc: Likewise. libgcc/ * crtstuff.c: Remove trailing whitespace. * libgcov.h: Likewise. * config/alpha/crtfastmath.c: Likewise. * config/alpha/vms-gcc_shell_handler.c: Likewise. * config/alpha/vms-unwind.h: Likewise. * config/pa/linux-atomic.c: Likewise. * config/pa/linux-unwind.h: Likewise. * config/pa/quadlib.c: Likewise. * config/pa/fptr.c: Likewise. * config/s390/32/_fixsfdi.c: Likewise. * config/s390/32/_fixunssfdi.c: Likewise. * config/s390/32/_fixunsdfdi.c: Likewise. * config/c6x/pr-support.c: Likewise. * config/lm32/_udivsi3.c: Likewise. * config/lm32/libgcc_lm32.h: Likewise. * config/lm32/_udivmodsi4.c: Likewise. * config/lm32/_mulsi3.c: Likewise. * config/lm32/_modsi3.c: Likewise. * config/lm32/_umodsi3.c: Likewise. * config/lm32/_divsi3.c: Likewise. * config/darwin-crt3.c: Likewise. * config/msp430/mpy.c: Likewise. * config/ia64/tf-signs.c: Likewise. * config/ia64/fde-vms.c: Likewise. * config/ia64/unwind-ia64.c: Likewise. * config/ia64/vms-unwind.h: Likewise. * config/ia64/sfp-exceptions.c: Likewise. * config/ia64/quadlib.c: Likewise. * config/ia64/unwind-ia64.h: Likewise. * config/rl78/vregs.h: Likewise. * config/arm/bpabi.c: Likewise. * config/arm/unwind-arm.c: Likewise. * config/arm/pr-support.c: Likewise. * config/arm/linux-atomic.c: Likewise. * config/arm/bpabi-lib.h: Likewise. * config/frv/frvend.c: Likewise. * config/frv/cmovw.c: Likewise. * config/frv/frvbegin.c: Likewise. * config/frv/cmovd.c: Likewise. * config/frv/cmovh.c: Likewise. * config/aarch64/cpuinfo.c: Likewise. * config/i386/crtfastmath.c: Likewise. * config/i386/cygming-crtend.c: Likewise. * config/i386/32/tf-signs.c: Likewise. * config/i386/crtprec.c: Likewise. * config/i386/sfp-exceptions.c: Likewise. * config/i386/w32-unwind.h: Likewise. * config/m32r/initfini.c: Likewise. * config/sparc/crtfastmath.c: Likewise. * config/gcn/amdgcn_veclib.h: Likewise. * config/nios2/linux-atomic.c: Likewise. * config/nios2/linux-unwind.h: Likewise. * config/nios2/lib2-mul.c: Likewise. * config/nios2/lib2-nios2.h: Likewise. * config/xtensa/unwind-dw2-xtensa.c: Likewise. * config/rs6000/darwin-fallback.c: Likewise. * config/rs6000/ibm-ldouble.c: Likewise. * config/rs6000/sfp-machine.h: Likewise. * config/rs6000/darwin-asm.h: Likewise. * config/rs6000/darwin-crt2.c: Likewise. * config/rs6000/aix-unwind.h: Likewise. * config/rs6000/sfp-exceptions.c: Likewise. * config/gthr-vxworks.c: Likewise. * config/riscv/atomic.c: Likewise. * config/visium/memcpy.c: Likewise. * config/darwin-crt-tm.c: Likewise. * config/stormy16/lib2funcs.c: Likewise. * config/arc/ieee-754/divtab-arc-sf.c: Likewise. * config/arc/ieee-754/divtab-arc-df.c: Likewise. * config/arc/initfini.c: Likewise. * config/sol2/gmon.c: Likewise. * config/microblaze/divsi3_table.c: Likewise. * config/m68k/fpgnulib.c: Likewise. * libgcov-driver.c: Likewise. * unwind-dw2.c: Likewise. * fp-bit.c: Likewise. * dfp-bit.h: Likewise. * dfp-bit.c: Likewise. * libgcov-driver-system.c: Likewise. libgcc/config/libbid/ * _le_td.c: Remove trailing whitespace. * bid128_compare.c: Likewise. * bid_div_macros.h: Likewise. * bid64_to_bid128.c: Likewise. * bid64_to_uint32.c: Likewise. * bid128_to_uint64.c: Likewise. * bid64_div.c: Likewise. * bid128_round_integral.c: Likewise. * bid_binarydecimal.c: Likewise. * bid128_string.c: Likewise. * bid_flag_operations.c: Likewise. * bid128_to_int64.c: Likewise. * _mul_sd.c: Likewise. * bid64_mul.c: Likewise. * bid128_noncomp.c: Likewise. * _gt_dd.c: Likewise. * bid64_add.c: Likewise. * bid64_string.c: Likewise. * bid_from_int.c: Likewise. * bid128.c: Likewise. * _ge_dd.c: Likewise. * _ne_sd.c: Likewise. * _dd_to_td.c: Likewise. * _unord_sd.c: Likewise. * bid64_to_uint64.c: Likewise. * _gt_sd.c: Likewise. * _sd_to_td.c: Likewise. * _addsub_td.c: Likewise. * _ne_td.c: Likewise. * bid_dpd.c: Likewise. * bid128_add.c: Likewise. * bid128_next.c: Likewise. * _lt_sd.c: Likewise. * bid64_next.c: Likewise. * bid128_mul.c: Likewise. * _lt_dd.c: Likewise. * _ge_td.c: Likewise. * _unord_dd.c: Likewise. * bid64_sqrt.c: Likewise. * bid_sqrt_macros.h: Likewise. * bid64_fma.c: Likewise. * _sd_to_dd.c: Likewise. * bid_conf.h: Likewise. * bid64_noncomp.c: Likewise. * bid_gcc_intrinsics.h: Likewise. * _gt_td.c: Likewise. * _ge_sd.c: Likewise. * bid128_minmax.c: Likewise. * bid128_quantize.c: Likewise. * bid32_to_bid64.c: Likewise. * bid_round.c: Likewise. * _td_to_sd.c: Likewise. * bid_inline_add.h: Likewise. * bid128_fma.c: Likewise. * _eq_td.c: Likewise. * bid32_to_bid128.c: Likewise. * bid64_rem.c: Likewise. * bid128_2_str_tables.c: Likewise. * _mul_dd.c: Likewise. * _dd_to_sd.c: Likewise. * bid128_div.c: Likewise. * _lt_td.c: Likewise. * bid64_compare.c: Likewise. * bid64_to_int32.c: Likewise. * _unord_td.c: Likewise. * bid128_rem.c: Likewise. * bid_internal.h: Likewise. * bid64_to_int64.c: Likewise. * _eq_dd.c: Likewise. * _td_to_dd.c: Likewise. * bid128_to_int32.c: Likewise. * bid128_to_uint32.c: Likewise. * _ne_dd.c: Likewise. * bid64_quantize.c: Likewise. * _le_dd.c: Likewise. * bid64_round_integral.c: Likewise. * _le_sd.c: Likewise. * bid64_minmax.c: Likewise. libgcc/config/avr/libf7/ * f7-renames.h: Remove trailing whitespace. libstdc++-v3/ * include/debug/debug.h: Remove trailing whitespace. * include/parallel/base.h: Likewise. * include/parallel/types.h: Likewise. * include/parallel/settings.h: Likewise. * include/parallel/multiseq_selection.h: Likewise. * include/parallel/partition.h: Likewise. * include/parallel/random_number.h: Likewise. * include/parallel/find_selectors.h: Likewise. * include/parallel/partial_sum.h: Likewise. * include/parallel/list_partition.h: Likewise. * include/parallel/search.h: Likewise. * include/parallel/algorithmfwd.h: Likewise. * include/parallel/random_shuffle.h: Likewise. * include/parallel/multiway_mergesort.h: Likewise. * include/parallel/sort.h: Likewise. * include/parallel/algobase.h: Likewise. * include/parallel/numericfwd.h: Likewise. * include/parallel/multiway_merge.h: Likewise. * include/parallel/losertree.h: Likewise. * include/bits/basic_ios.h: Likewise. * include/bits/stringfwd.h: Likewise. * include/bits/ostream_insert.h: Likewise. * include/bits/stl_heap.h: Likewise. * include/bits/unordered_map.h: Likewise. * include/bits/hashtable_policy.h: Likewise. * include/bits/stl_iterator_base_funcs.h: Likewise. * include/bits/valarray_before.h: Likewise. * include/bits/regex.h: Likewise. * include/bits/postypes.h: Likewise. * include/bits/stl_iterator.h: Likewise. * include/bits/localefwd.h: Likewise. * include/bits/stl_algo.h: Likewise. * include/bits/ios_base.h: Likewise. * include/bits/stl_function.h: Likewise. * include/bits/basic_string.h: Likewise. * include/bits/hashtable.h: Likewise. * include/bits/valarray_after.h: Likewise. * include/bits/char_traits.h: Likewise. * include/bits/gslice.h: Likewise. * include/bits/locale_facets_nonio.h: Likewise. * include/bits/mask_array.h: Likewise. * include/bits/specfun.h: Likewise. * include/bits/random.h: Likewise. * include/bits/slice_array.h: Likewise. * include/bits/valarray_array.h: Likewise. * include/tr1/float.h: Likewise. * include/tr1/functional_hash.h: Likewise. * include/tr1/math.h: Likewise. * include/tr1/hashtable_policy.h: Likewise. * include/tr1/stdio.h: Likewise. * include/tr1/complex.h: Likewise. * include/tr1/stdbool.h: Likewise. * include/tr1/stdarg.h: Likewise. * include/tr1/inttypes.h: Likewise. * include/tr1/fenv.h: Likewise. * include/tr1/stdlib.h: Likewise. * include/tr1/wchar.h: Likewise. * include/tr1/tgmath.h: Likewise. * include/tr1/limits.h: Likewise. * include/tr1/wctype.h: Likewise. * include/tr1/stdint.h: Likewise. * include/tr1/ctype.h: Likewise. * include/tr1/random.h: Likewise. * include/tr1/shared_ptr.h: Likewise. * include/ext/mt_allocator.h: Likewise. * include/ext/sso_string_base.h: Likewise. * include/ext/debug_allocator.h: Likewise. * include/ext/vstring_fwd.h: Likewise. * include/ext/pointer.h: Likewise. * include/ext/pod_char_traits.h: Likewise. * include/ext/malloc_allocator.h: Likewise. * include/ext/vstring.h: Likewise. * include/ext/bitmap_allocator.h: Likewise. * include/ext/pool_allocator.h: Likewise. * include/ext/type_traits.h: Likewise. * include/ext/ropeimpl.h: Likewise. * include/ext/codecvt_specializations.h: Likewise. * include/ext/throw_allocator.h: Likewise. * include/ext/extptr_allocator.h: Likewise. * include/ext/atomicity.h: Likewise. * include/ext/concurrence.h: Likewise. * include/c_compatibility/wchar.h: Likewise. * include/c_compatibility/stdint.h: Likewise. * include/backward/hash_fun.h: Likewise. * include/backward/binders.h: Likewise. * include/backward/hashtable.h: Likewise. * include/backward/auto_ptr.h: Likewise. * libsupc++/eh_arm.cc: Likewise. * libsupc++/unwind-cxx.h: Likewise. * libsupc++/si_class_type_info.cc: Likewise. * libsupc++/vec.cc: Likewise. * libsupc++/class_type_info.cc: Likewise. * libsupc++/vmi_class_type_info.cc: Likewise. * libsupc++/guard_error.cc: Likewise. * libsupc++/bad_typeid.cc: Likewise. * libsupc++/eh_personality.cc: Likewise. * libsupc++/atexit_arm.cc: Likewise. * libsupc++/pmem_type_info.cc: Likewise. * libsupc++/vterminate.cc: Likewise. * libsupc++/eh_terminate.cc: Likewise. * libsupc++/bad_cast.cc: Likewise. * libsupc++/exception_ptr.h: Likewise. * libsupc++/eh_throw.cc: Likewise. * libsupc++/bad_alloc.cc: Likewise. * libsupc++/nested_exception.cc: Likewise. * libsupc++/pointer_type_info.cc: Likewise. * libsupc++/pbase_type_info.cc: Likewise. * libsupc++/bad_array_new.cc: Likewise. * libsupc++/pure.cc: Likewise. * libsupc++/eh_exception.cc: Likewise. * libsupc++/bad_array_length.cc: Likewise. * libsupc++/cxxabi.h: Likewise. * libsupc++/guard.cc: Likewise. * libsupc++/eh_catch.cc: Likewise. * libsupc++/cxxabi_forced.h: Likewise. * libsupc++/tinfo.h: Likewise.
In r15-3714-gd3a7302ec5985a I added -Wsystem-headers to the libstdc++ build flags to help catch problems in the library. This patch takes a different approach, of disabling the #pragma system_header unless _GLIBCXX_SYSHDR is defined. As a result, the testsuites will treat them as non-system-headers to get better warning coverage during regression testing of both gcc and libstdc++, not just when building the library. My rationale for the #ifdef instead of just removing the #pragma is the three G++ tests that want to test libstdc++ system header behavior, so we need a way to select it. This doesn't affect installed libraries, as they get their system-header status from the lookup path. But testsuite_flags --build-includes gives -I directives rather than -isystem. This patch doesn't change the headers in config/ because I'm not compiling with most of them, so won't see any warnings that need fixing. Adjusting them could happen later, or we can not bother. libstdc++-v3/ChangeLog: * acinclude.m4 (WARN_FLAGS): Remove -Wsystem-headers. * configure: Regenerate. * include/bits/algorithmfwd.h: #ifdef out #pragma GCC system_header. * include/bits/atomic_base.h * include/bits/atomic_futex.h * include/bits/atomic_timed_wait.h * include/bits/atomic_wait.h * include/bits/basic_ios.h * include/bits/basic_string.h * include/bits/boost_concept_check.h * include/bits/char_traits.h * include/bits/charconv.h * include/bits/chrono.h * include/bits/chrono_io.h * include/bits/codecvt.h * include/bits/concept_check.h * include/bits/cpp_type_traits.h * include/bits/elements_of.h * include/bits/enable_special_members.h * include/bits/erase_if.h * include/bits/forward_list.h * include/bits/functional_hash.h * include/bits/gslice.h * include/bits/gslice_array.h * include/bits/hashtable.h * include/bits/indirect_array.h * include/bits/invoke.h * include/bits/ios_base.h * include/bits/iterator_concepts.h * include/bits/locale_classes.h * include/bits/locale_facets.h * include/bits/locale_facets_nonio.h * include/bits/localefwd.h * include/bits/mask_array.h * include/bits/max_size_type.h * include/bits/memory_resource.h * include/bits/memoryfwd.h * include/bits/move_only_function.h * include/bits/node_handle.h * include/bits/ostream_insert.h * include/bits/out_ptr.h * include/bits/parse_numbers.h * include/bits/postypes.h * include/bits/quoted_string.h * include/bits/range_access.h * include/bits/ranges_base.h * include/bits/refwrap.h * include/bits/sat_arith.h * include/bits/semaphore_base.h * include/bits/slice_array.h * include/bits/std_abs.h * include/bits/std_function.h * include/bits/std_mutex.h * include/bits/std_thread.h * include/bits/stl_iterator_base_funcs.h * include/bits/stl_iterator_base_types.h * include/bits/stl_tree.h * include/bits/stream_iterator.h * include/bits/streambuf_iterator.h * include/bits/stringfwd.h * include/bits/this_thread_sleep.h * include/bits/unique_lock.h * include/bits/uses_allocator_args.h * include/bits/utility.h * include/bits/valarray_after.h * include/bits/valarray_array.h * include/bits/valarray_before.h * include/bits/version.h * include/c_compatibility/fenv.h * include/c_compatibility/inttypes.h * include/c_compatibility/stdint.h * include/decimal/decimal.h * include/experimental/bits/net.h * include/experimental/bits/shared_ptr.h * include/ext/aligned_buffer.h * include/ext/alloc_traits.h * include/ext/atomicity.h * include/ext/concurrence.h * include/ext/numeric_traits.h * include/ext/pod_char_traits.h * include/ext/pointer.h * include/ext/stdio_filebuf.h * include/ext/stdio_sync_filebuf.h * include/ext/string_conversions.h * include/ext/type_traits.h * include/ext/vstring.h * include/ext/vstring_fwd.h * include/ext/vstring_util.h * include/parallel/algorithmfwd.h * include/parallel/numericfwd.h * include/tr1/functional_hash.h * include/tr1/hashtable.h * include/tr1/random.h * libsupc++/exception.h * libsupc++/hash_bytes.h * include/bits/basic_ios.tcc * include/bits/basic_string.tcc * include/bits/fstream.tcc * include/bits/istream.tcc * include/bits/locale_classes.tcc * include/bits/locale_facets.tcc * include/bits/locale_facets_nonio.tcc * include/bits/ostream.tcc * include/bits/sstream.tcc * include/bits/streambuf.tcc * include/bits/string_view.tcc * include/bits/version.tpl * include/experimental/bits/string_view.tcc * include/ext/pb_ds/detail/resize_policy/hash_prime_size_policy_imp.hpp * include/ext/random.tcc * include/ext/vstring.tcc * include/tr2/bool_set.tcc * include/tr2/dynamic_bitset.tcc * include/bits/c++config * include/c/cassert * include/c/cctype * include/c/cerrno * include/c/cfloat * include/c/ciso646 * include/c/climits * include/c/clocale * include/c/cmath * include/c/csetjmp * include/c/csignal * include/c/cstdarg * include/c/cstddef * include/c/cstdio * include/c/cstdlib * include/c/cstring * include/c/ctime * include/c/cuchar * include/c/cwchar * include/c/cwctype * include/c_global/cassert * include/c_global/ccomplex * include/c_global/cctype * include/c_global/cerrno * include/c_global/cfenv * include/c_global/cfloat * include/c_global/cinttypes * include/c_global/ciso646 * include/c_global/climits * include/c_global/clocale * include/c_global/cmath * include/c_global/csetjmp * include/c_global/csignal * include/c_global/cstdalign * include/c_global/cstdarg * include/c_global/cstdbool * include/c_global/cstddef * include/c_global/cstdint * include/c_global/cstdio * include/c_global/cstdlib * include/c_global/cstring * include/c_global/ctgmath * include/c_global/ctime * include/c_global/cuchar * include/c_global/cwchar * include/c_global/cwctype * include/c_std/cassert * include/c_std/cctype * include/c_std/cerrno * include/c_std/cfloat * include/c_std/ciso646 * include/c_std/climits * include/c_std/clocale * include/c_std/cmath * include/c_std/csetjmp * include/c_std/csignal * include/c_std/cstdarg * include/c_std/cstddef * include/c_std/cstdio * include/c_std/cstdlib * include/c_std/cstring * include/c_std/ctime * include/c_std/cuchar * include/c_std/cwchar * include/c_std/cwctype * include/debug/array * include/debug/bitset * include/debug/deque * include/debug/forward_list * include/debug/list * include/debug/map * include/debug/set * include/debug/string * include/debug/unordered_map * include/debug/unordered_set * include/debug/vector * include/decimal/decimal * include/experimental/algorithm * include/experimental/any * include/experimental/array * include/experimental/buffer * include/experimental/chrono * include/experimental/contract * include/experimental/deque * include/experimental/executor * include/experimental/filesystem * include/experimental/forward_list * include/experimental/functional * include/experimental/internet * include/experimental/io_context * include/experimental/iterator * include/experimental/list * include/experimental/map * include/experimental/memory * include/experimental/memory_resource * include/experimental/net * include/experimental/netfwd * include/experimental/numeric * include/experimental/propagate_const * include/experimental/ratio * include/experimental/regex * include/experimental/scope * include/experimental/set * include/experimental/socket * include/experimental/string * include/experimental/string_view * include/experimental/synchronized_value * include/experimental/system_error * include/experimental/timer * include/experimental/tuple * include/experimental/type_traits * include/experimental/unordered_map * include/experimental/unordered_set * include/experimental/vector * include/ext/algorithm * include/ext/cmath * include/ext/functional * include/ext/iterator * include/ext/memory * include/ext/numeric * include/ext/random * include/ext/rb_tree * include/ext/rope * include/parallel/algorithm * include/std/algorithm * include/std/any * include/std/array * include/std/atomic * include/std/barrier * include/std/bit * include/std/bitset * include/std/charconv * include/std/chrono * include/std/codecvt * include/std/complex * include/std/concepts * include/std/condition_variable * include/std/coroutine * include/std/deque * include/std/execution * include/std/expected * include/std/filesystem * include/std/format * include/std/forward_list * include/std/fstream * include/std/functional * include/std/future * include/std/generator * include/std/iomanip * include/std/ios * include/std/iosfwd * include/std/iostream * include/std/istream * include/std/iterator * include/std/latch * include/std/limits * include/std/list * include/std/locale * include/std/map * include/std/memory * include/std/memory_resource * include/std/mutex * include/std/numbers * include/std/numeric * include/std/optional * include/std/ostream * include/std/print * include/std/queue * include/std/random * include/std/ranges * include/std/ratio * include/std/regex * include/std/scoped_allocator * include/std/semaphore * include/std/set * include/std/shared_mutex * include/std/span * include/std/spanstream * include/std/sstream * include/std/stack * include/std/stacktrace * include/std/stdexcept * include/std/streambuf * include/std/string * include/std/string_view * include/std/syncstream * include/std/system_error * include/std/text_encoding * include/std/thread * include/std/tuple * include/std/type_traits * include/std/typeindex * include/std/unordered_map * include/std/unordered_set * include/std/utility * include/std/valarray * include/std/variant * include/std/vector * include/std/version * include/tr1/array * include/tr1/cfenv * include/tr1/cinttypes * include/tr1/cmath * include/tr1/complex * include/tr1/cstdbool * include/tr1/cstdint * include/tr1/cstdio * include/tr1/cstdlib * include/tr1/cwchar * include/tr1/cwctype * include/tr1/functional * include/tr1/memory * include/tr1/random * include/tr1/regex * include/tr1/tuple * include/tr1/type_traits * include/tr1/unordered_map * include/tr1/unordered_set * include/tr1/utility * include/tr2/bool_set * include/tr2/dynamic_bitset * include/tr2/type_traits * libsupc++/atomic_lockfree_defines.h * libsupc++/compare * libsupc++/cxxabi.h * libsupc++/cxxabi_forced.h * libsupc++/cxxabi_init_exception.h * libsupc++/exception * libsupc++/initializer_list * libsupc++/new * libsupc++/typeinfo: Likewise. * testsuite/20_util/ratio/operations/ops_overflow_neg.cc * testsuite/23_containers/array/tuple_interface/get_neg.cc * testsuite/23_containers/vector/cons/destructible_debug_neg.cc * testsuite/24_iterators/operations/prev_neg.cc * testsuite/ext/type_traits/add_unsigned_floating_neg.cc * testsuite/ext/type_traits/add_unsigned_integer_neg.cc * testsuite/ext/type_traits/remove_unsigned_floating_neg.cc * testsuite/ext/type_traits/remove_unsigned_integer_neg.cc: Adjust line numbers. gcc/testsuite/ChangeLog * g++.dg/analyzer/fanalyzer-show-events-in-system-headers-default.C * g++.dg/analyzer/fanalyzer-show-events-in-system-headers-no.C * g++.dg/diagnostic/disable.C: #define _GLIBCXX_SYSHDR.
Dispatching to partial specializations doesn't really seem to offer much benefit here. The __is_trivial(T) condition is a compile-time constant so the untaken branches are dead code and don't cost us anything. libstdc++-v3/ChangeLog: * include/bits/valarray_array.h (_Array_default_ctor): Remove. (__valarray_default_construct): Inline it into here. (_Array_init_ctor): Remove. (__valarray_fill_construct): Inline it into here. (_Array_copy_ctor): Remove. (__valarray_copy_construct(const T*, const T*, T*)): Inline it into here. (__valarray_copy_construct(const T*, size_t, size_t, T*)): Use _GLIBCXX17_CONSTEXPR for constant condition.
This removes the use of the std::__is_scalar trait from <valarray>, where it can be replaced by __is_trivial. It's used to decide whether we can use memset to value-initialize valarray elements, but memset is suitable for any trivial types, because value-initializing them is equivalent to filling them with zeros. This is another step towards removing the class templates in <bits/cpp_type_traits.h> that conflict with Clang built-in names. libstdc++-v3/ChangeLog: PR libstdc++/115497 * include/bits/valarray_array.h (__valarray_default_construct): Use __is_trivial(_Tp). instead of __is_scalar<_Tp>.