https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105258
--- Comment #9 from GCC Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>: https://gcc.gnu.org/g:b0efdcbf58a76af3b8fff75f1d53d334fb5b46ee commit r15-997-gb0efdcbf58a76af3b8fff75f1d53d334fb5b46ee Author: Jonathan Wakely <jwak...@redhat.com> Date: Wed Apr 13 13:03:44 2022 +0100 libstdc++: Handle extended alignment in std::get_temporary_buffer [PR105258] This adds extended alignment support to std::get_temporary_buffer etc. so that when std::stable_sort uses a temporary buffer it works for overaligned types. Also simplify the _Temporary_buffer type by using RAII for the allocation, via a new data member. This simplifies the _Temporary_buffer constructor and destructor by makingthem only responsible for constructing and destroying the elements, not managing the memory. libstdc++-v3/ChangeLog: PR libstdc++/105258 * include/bits/stl_tempbuf.h (__detail::__get_temporary_buffer): New function to do allocation for get_temporary_buffer, with extended alignment support. (__detail::__return_temporary_buffer): Support extended alignment. (get_temporary_buffer): Use __get_temporary_buffer. (return_temporary_buffer): Support extended alignment. Add deprecated attribute. (_Temporary_buffer): Move allocation and deallocation into a subobject and remove try-catch block in constructor. (__uninitialized_construct_buf): Use argument deduction for value type. * testsuite/20_util/temporary_buffer.cc: Add dg-warning for new deprecated warning. * testsuite/25_algorithms/stable_sort/overaligned.cc: New test.
