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from 51e9e8a2e20 x86_64: Improvements to arithmetic right shifts of V1TImode [...] new 7f390f11b44 libstdc++: Document new std::random_device tokens new d67ba1dce97 libstdc++: Use std::construct_at in std::common_iterator [P [...] new fc6f1128ae6 libstdc++: Ignore cv-quals when std::allocator<void> constructs new 9a0b518a82d libstdc++: Add C++20 std::make_shared enhancements (P0674R1)

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Summary of changes: libstdc++-v3/doc/html/manual/status.html | 13 + libstdc++-v3/doc/xml/manual/status_cxx2011.xml | 30 +++ libstdc++-v3/include/bits/shared_ptr.h | 271 ++++++++++++++++++- libstdc++-v3/include/bits/shared_ptr_base.h | 299 ++++++++++++++++++++- libstdc++-v3/include/bits/stl_construct.h | 4 +- libstdc++-v3/include/bits/stl_iterator.h | 8 +- libstdc++-v3/include/std/version | 6 +- libstdc++-v3/testsuite/20_util/allocator/void.cc | 15 ++ .../testsuite/20_util/shared_ptr/creation/99006.cc | 7 +- .../testsuite/20_util/shared_ptr/creation/array.cc | 224 +++++++++++++++ .../20_util/shared_ptr/creation/overwrite.cc | 143 ++++++++++ .../20_util/shared_ptr/creation/version.cc | 18 ++ .../20_util/unique_ptr/creation/for_overwrite.cc | 25 +- .../testsuite/24_iterators/common_iterator/1.cc | 16 ++ 14 files changed, 1055 insertions(+), 24 deletions(-) create mode 100644 libstdc++-v3/testsuite/20_util/shared_ptr/creation/array.cc create mode 100644 libstdc++-v3/testsuite/20_util/shared_ptr/creation/overwrite.cc create mode 100644 libstdc++-v3/testsuite/20_util/shared_ptr/creation/version.cc