[gcc r12-1661] Daily bump.

[gcc r12-1661] Daily bump.

[GCC Administrator]

https://gcc.gnu.org/g:b245d1c3d6fb2621a232ddcb8928cbad0e5134bd

commit r12-1661-gb245d1c3d6fb2621a232ddcb8928cbad0e5134bd
Author: GCC Administrator <gccadmin@gcc.gnu.org>
Date:   Sun Jun 20 00:16:21 2021 +0000

    Daily bump.

Diff:
---
 gcc/DATESTAMP          |  2 +-
 libstdc++-v3/ChangeLog | 20 ++++++++++++++++++++
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index a522144b0f9..3a84504fca8 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20210619
+20210620
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index f8d6fa74a3b..87645fa3db2 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,23 @@
+2021-06-19  Patrick Palka  <ppalka@redhat.com>
+
+	* include/std/ranges (transform_view::_Iterator::_S_iter_concept):
+	Consider _Base instead of _Vp as per LWG 3555.
+	(elements_view::_Iterator::_S_iter_concept): Likewise.
+
+2021-06-19  Patrick Palka  <ppalka@redhat.com>
+
+	* include/std/ranges (split_view::_OuterIter::value_type::begin):
+	Remove the non-const overload, and remove the copyable constraint
+	on the const overload as per LWG 3553.
+
+2021-06-19  Patrick Palka  <ppalka@redhat.com>
+
+	* include/bits/stl_iterator.h
+	(__detail::__common_iter_use_postfix_proxy): Add
+	move_constructible constraint as per LWG 3546.
+	(common_iterator::__postfix_proxy): Adjust initializer of
+	_M_keep as per LWG 3546.
+
 2021-06-18  Patrick Palka  <ppalka@redhat.com>
 
 	PR libstdc++/100387