[gcc/devel/c++-coroutines] Merge master r12-1164.

[gcc/devel/c++-coroutines] Merge master r12-1164.

[Iain D Sandoe]

https://gcc.gnu.org/g:a7be5fecf1d22c2e7c07eb5289939928ba561b9c

commit a7be5fecf1d22c2e7c07eb5289939928ba561b9c
Merge: f25f21cea92 659cc7d6320
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Wed Jun 2 19:38:04 2021 +0100

    Merge master r12-1164.
    
            * Merge master r12-1164-g659cc7d6320.

Diff:

 MAINTAINERS                                        |   6 +
 gcc/ChangeLog                                      | 132 +++++++++++++++++++
 gcc/DATESTAMP                                      |   2 +-
 gcc/c-family/ChangeLog                             |   9 ++
 gcc/config/arc/arc.h                               |   2 +-
 gcc/config/h8300/h8300-protos.h                    |   7 +-
 gcc/config/h8300/h8300.c                           |  21 +--
 gcc/config/h8300/h8300.md                          |   2 +
 gcc/config/h8300/logical.md                        |  77 +++++------
 gcc/config/h8300/shiftrotate.md                    |  12 +-
 gcc/config/s390/s390.md                            |  14 +-
 gcc/config/s390/subst.md                           |   2 +-
 gcc/cp/ChangeLog                                   |  19 +++
 gcc/cp/init.c                                      |   4 +-
 gcc/fortran/ChangeLog                              |  38 ++++++
 gcc/gimplify.c                                     |  34 +----
 gcc/ipa-icf.h                                      |   2 +-
 gcc/testsuite/ChangeLog                            |  61 +++++++++
 gcc/testsuite/g++.dg/cpp0x/constexpr-delegating3.C |  10 ++
 gcc/testsuite/g++.dg/cpp0x/dc10.C                  |  19 +++
 gcc/testsuite/g++.dg/cpp0x/initlist-base4.C        |  26 ++++
 gcc/testsuite/g++.dg/cpp2a/constexpr-init22.C      |  14 ++
 gcc/testsuite/g++.dg/ext/builtin-shufflevector-1.C |   1 +
 gcc/testsuite/gcc.dg/tree-ssa/tailcall-10.c        |  12 ++
 gcc/testsuite/gcc.dg/tree-ssa/tailcall-11.c        |  12 ++
 gcc/testsuite/gcc.dg/tree-ssa/tailcall-12.c        |  12 ++
 gcc/testsuite/gcc.dg/tree-ssa/tailcall-13.c        |  15 +++
 gcc/testsuite/gcc.dg/tree-ssa/tailrecursion-8.c    |  11 ++
 gcc/testsuite/gcc.target/s390/ashr.c               |  11 ++
 gcc/testsuite/gfortran.dg/gomp/taskloop-2.f90      |  72 +++++++++++
 gcc/tree-ssa-phiopt.c                              | 144 ++++++---------------
 gcc/tree-tailcall.c                                |   6 +-
 libstdc++-v3/ChangeLog                             |  38 ++++++
 libstdc++-v3/doc/html/manual/abi.html              |  16 +--
 libstdc++-v3/doc/html/manual/facets.html           |   2 +-
 libstdc++-v3/doc/html/manual/status.html           |  18 +--
 libstdc++-v3/doc/xml/manual/status_cxxis29124.xml  |   6 +-
 libstdc++-v3/doc/xml/manual/status_cxxtr1.xml      |   6 +-
 libstdc++-v3/doc/xml/manual/status_cxxtr24733.xml  |   7 +-
 libstdc++-v3/include/bits/hashtable_policy.h       |   6 +-
 .../23_containers/deque/allocator/default_init.cc  |   1 -
 .../forward_list/allocator/default_init.cc         |   1 -
 .../23_containers/list/allocator/default_init.cc   |   1 -
 .../23_containers/map/allocator/default_init.cc    |   1 -
 .../23_containers/set/allocator/default_init.cc    |   1 -
 .../testsuite/23_containers/unordered_map/96088.cc |  22 +++-
 .../unordered_map/allocator/default_init.cc        |   1 -
 .../testsuite/23_containers/unordered_set/96088.cc |  22 +++-
 .../unordered_set/allocator/default_init.cc        |   1 -
 .../23_containers/vector/allocator/default_init.cc |   1 -
 .../vector/bool/allocator/default_init.cc          |   1 -
 51 files changed, 695 insertions(+), 266 deletions(-)