[gcc/devel/c++-coroutines] Merge master r12-2858.

[gcc/devel/c++-coroutines] Merge master r12-2858.

[Iain D Sandoe]

https://gcc.gnu.org/g:7bb3f752afe4f0f2ec38e996bdde9db3f72ee1fd

commit 7bb3f752afe4f0f2ec38e996bdde9db3f72ee1fd
Merge: 97b432d2c32 4fa6c0ec350
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Wed Aug 11 19:28:34 2021 +0100

    Merge master r12-2858.
    
            * Merge master r12-2858-g4fa6c0ec350b.

Diff:

 contrib/ChangeLog                                  |   4 +
 gcc/ChangeLog                                      |  67 +++++++++++++
 gcc/DATESTAMP                                      |   2 +-
 gcc/ada/gcc-interface/trans.c                      |   4 +-
 gcc/c/ChangeLog                                    |   6 ++
 gcc/cfgexpand.c                                    |   9 +-
 gcc/config/arm/arm_neon.h                          | 107 +++++++++++----------
 gcc/config/arm/arm_neon_builtins.def               |   3 -
 gcc/config/i386/i386.md                            |  34 +++++--
 gcc/cp/ChangeLog                                   |  42 ++++++++
 gcc/fold-const.c                                   |   2 +
 gcc/fortran/iso-c-binding.def                      |  15 ++-
 gcc/fortran/trans-common.c                         |   9 +-
 gcc/fortran/trans-types.c                          |  12 ++-
 gcc/go/gofrontend/MERGE                            |   2 +-
 gcc/go/gofrontend/expressions.cc                   |  15 ++-
 gcc/ipa-modref.c                                   |  35 ++++---
 gcc/testsuite/ChangeLog                            |  69 +++++++++++++
 gcc/testsuite/c-c++-common/modref-dse.c            |  38 ++++++++
 gcc/testsuite/gcc.dg/lto/pr48622_1.c               |   6 ++
 gcc/testsuite/gcc.dg/pr101858.c                    |   9 ++
 gcc/testsuite/gcc.dg/uninit-pred-9_b.c             |   2 +-
 gcc/testsuite/gcc.target/arm/pr51534.c             |  26 ++---
 gcc/testsuite/gcc.target/i386/pr98309-1.c          |  18 ++++
 gcc/testsuite/gcc.target/i386/pr98309-2.c          |  39 ++++++++
 gcc/tree-ssa-forwprop.c                            |   3 +-
 gcc/tree-ssa-operands.c                            |   7 +-
 gcc/tree-vect-stmts.c                              |   3 +-
 libgfortran/ChangeLog                              |  10 ++
 .../sanitizer_common_interceptors.inc              |  12 +--
 libstdc++-v3/ChangeLog                             |   2 +
 libstdc++-v3/include/std/type_traits               |  27 ++++++
 libstdc++-v3/include/std/version                   |   4 +
 .../20_util/is_pointer_interconvertible/value.cc   |  51 ++++++++++
 .../20_util/is_pointer_interconvertible/version.cc |  10 ++
 .../testsuite/23_containers/span/layout_compat.cc  |   2 +-
 36 files changed, 572 insertions(+), 134 deletions(-)