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This ensures we do not optimize a std::copy() of trivial types to memmove() if the unoptimized form would be ill-formed because the type isn't assignable, and similarly does not optimize std::uninitialized_xxx() on trivial types to simple assignment when the type isn't assignable. This fixes the regression with std::vector<std::atomic<int>> v(1). 2013-11-09 Jonathan Wakely <jwakely.gcc@gmail.com> PR libstdc++/58982 * include/bits/stl_algobase.h (__copy_move::__copy_m): Use assertion to prevent using memmove() on non-assignable types. (__copy_move_backward::__copy_move_b): Likewise. * include/bits/stl_uninitialized.h (uninitialized_copy uninitialized_copy_n, uninitialized_fill, uninitialized_fill_n, __uninitialized_default, __uninitialized_default_n): Check for assignable as well as trivial. * testsuite/20_util/specialized_algorithms/uninitialized_copy/ 58982.cc: New. * testsuite/20_util/specialized_algorithms/uninitialized_copy_n/ 58982.cc: New. * testsuite/20_util/specialized_algorithms/uninitialized_fill/ 58982.cc: New. * testsuite/20_util/specialized_algorithms/uninitialized_fill_n/ 58982.cc: New. * testsuite/25_algorithms/copy/58982.cc: New. * testsuite/25_algorithms/copy_n/58982.cc: New. Tested x86_64-linux, committed to trunk.
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