[gcc/devel/sphinx] Merge branch 'master' into devel/sphinx

[Martin Liska]

https://gcc.gnu.org/g:9d82b7b438bab705ca6da09e997c28c0439e5f72

commit 9d82b7b438bab705ca6da09e997c28c0439e5f72
Merge: 4cab4ee4f16 41cc28405c7
Author: Martin Liska <mliska@suse.cz>
Date:   Thu Dec 16 15:22:45 2021 +0100

    Merge branch 'master' into devel/sphinx

Diff:

 gcc/config/rs6000/rs6000-c.c | 1717 +++++++++++++++++++++++-------------------
 gcc/doc/invoke.texi          |    2 +-
 2 files changed, 946 insertions(+), 773 deletions(-)