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from 22f1f765db0 More of autofdo 0 issues new bdae7824cd9 libstdc++: Optimize std::counting_semaphore for futex path new ba1ad0ec6fe libstdc++: Add assertions to atomic waiting functions that [...] new 572dd0dd8db Avoid useless reading of profile data in LTO

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Summary of changes: gcc/coverage.cc | 3 + libstdc++-v3/include/bits/atomic_timed_wait.h | 6 + libstdc++-v3/include/bits/atomic_wait.h | 8 +- libstdc++-v3/include/bits/semaphore_base.h | 230 ++++++++++++++++++++------ libstdc++-v3/include/std/semaphore | 5 +- 5 files changed, 195 insertions(+), 57 deletions(-)