[gcc(refs/vendors/redhat/heads/gcc-11-branch)] Merge commit 'r11-8287-g7a7fc01b9d20afb1a2b805d93cb838a38e656420' into redhat/gcc-11-branch

[Jakub Jelinek]

https://gcc.gnu.org/g:c76c301ee2291a548ade37778a77407e520967e5

commit c76c301ee2291a548ade37778a77407e520967e5
Merge: 8047c64ba5b 7a7fc01b9d2
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Apr 23 20:15:39 2021 +0200

    Merge commit 'r11-8287-g7a7fc01b9d20afb1a2b805d93cb838a38e656420' into redhat/gcc-11-branch

Diff:

 gcc/DATESTAMP                                      |  2 +-
 gcc/testsuite/ChangeLog                            | 17 ++++++++++
 gcc/testsuite/{ => gfortran.dg}/substr_10.f90      |  0
 gcc/testsuite/{ => gfortran.dg}/substr_9.f90       |  0
 libgomp/ChangeLog                                  |  8 +++++
 libstdc++-v3/ChangeLog                             | 39 ++++++++++++++++++++++
 libstdc++-v3/include/bits/atomic_timed_wait.h      | 22 +++++++-----
 .../30_threads/semaphore/try_acquire_for.cc        |  2 --
 .../30_threads/semaphore/try_acquire_posix.cc      |  1 +
 .../30_threads/semaphore/try_acquire_until.cc      |  2 --
 10 files changed, 79 insertions(+), 14 deletions(-)