[gcc r16-9658] Daily bump.

[GCC Administrator]

https://gcc.gnu.org/g:59c09a39d0e89c0a19606d0c8dfd8c023cf5d75f

commit r16-9658-g59c09a39d0e89c0a19606d0c8dfd8c023cf5d75f
Author: GCC Administrator <gccadmin@gcc.gnu.org>
Date:   Tue Sep 15 00:20:13 2026 +0000

    Daily bump.

Diff:
---
 gcc/ChangeLog           | 20 ++++++++++++++++++
 gcc/DATESTAMP           |  2 +-
 gcc/testsuite/ChangeLog | 17 ++++++++++++++++
 libstdc++-v3/ChangeLog  | 54 +++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 92 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e6b6cd691ff7..dd489a5aa4b6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,23 @@
+2026-09-14  Jeff Law  <jeffreyalaw@gmail.com>
+
+	Backported from master:
+	2026-09-13  Jeff Law  <jeffreyalaw@gmail.com>
+		    Sun Yuechi  <sunyuechi@iscas.ac.cn
+
+	* config/riscv/riscv-bclr-lowest-set-bit.cc
+	(pass_bclr_lowest_set_bit::execute): Do not handle addiw forms.
+
+2026-09-14  Jeff Law  <jeffrey.law@oss.qualcomm.com>
+
+	Backported from master:
+	2026-09-11  Jeff Law  <jeffrey.law@oss.qualcomm.com>
+
+	PR target/127306
+	* config/riscv/riscv-bclr-lowest-set-bit.cc (find_later_ctz): Fix
+	off-by-one error for scan to verify ctz input isn't modified.
+	(pass_bclr_lowest_bit_set::execute): Remove original AND in case
+	where the CTZ is found after the AND.
+
 2026-09-13  Jeff Law  <jeffrey.law@oss.qualcomm.com>
 
 	Backported from master:
diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index 1c5002a42eae..1ded3e06871f 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20260914
+20260915
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 346eefb4abe5..01e4b18fb806 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,20 @@
+2026-09-14  Jeff Law  <jeffreyalaw@gmail.com>
+
+	Backported from master:
+	2026-09-13  Jeff Law  <jeffreyalaw@gmail.com>
+		    Sun Yuechi  <sunyuechi@iscas.ac.cn
+
+	* gcc.target/riscv/bclr-lowest-set-bit-1.c: Update expected output.
+	* gcc.target/riscv/bclr-lowest-set-bit-2.c: New test.
+
+2026-09-14  Jeff Law  <jeffrey.law@oss.qualcomm.com>
+
+	Backported from master:
+	2026-09-11  Jeff Law  <jeffrey.law@oss.qualcomm.com>
+
+	PR target/127306
+	* gcc.target/riscv/pr127306.c: New test.
+
 2026-09-13  Zhou Qiankang  <wszqkzqk@qq.com>
 
 	Backported from master:
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 7dcd6ded9dbf..05d25baa455a 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,57 @@
+2026-09-14  Tomasz Kamiński  <tkaminsk@redhat.com>
+
+	PR libstdc++/124121
+	* include/std/inplace_vector (inplace_vector::_M_init): Remove
+	unnecessary start_lifetime_as call. Emit error using
+	__builtin_constexpr_diag.
+
+2026-09-14  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2026-09-10  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/127220
+	* include/std/format (__format::_Arg_t): Move definition
+	earlier.
+	(basic_format_parse_context::check_dynamic_spec): Construct
+	array of _Arg_t from template parameter list.
+	(basic_format_parse_context::check_dynamic_spec_integral):
+	Construct array of _Arg_t based on supported types.
+	(basic_format_parse_context::check_dynamic_spec_string):
+	Likewise.
+	(basic_format_parse_context::__check_dynamic_spec): Replace
+	template parameter list with span<const _Arg_t> function
+	parameter and simplify accordingly. Define in class body.
+	(basic_format_parse_context::_Scan_parse_context): New struct
+	the replaces _Scanner::_Parse_context.
+	(__format::_Scanner::_M_pc): Change type to _Scan_parse_context.
+
+2026-09-14  Steven Sudit  <stevensudit@gmail.com>
+
+	Backported from master:
+	2026-09-09  Steven Sudit  <stevensudit@gmail.com>
+
+	PR libstdc++/127219
+	* include/std/format
+	(basic_format_parse_context::__valid_types_for_check_dynamic_spec):
+	Make static, so that the static_assert in check_dynamic_spec does
+	not use this.
+
+2026-09-14  Tomasz Kamiński  <tkaminsk@redhat.com>
+
+	Backported from master:
+	2026-09-10  Tomasz Kamiński  <tkaminsk@redhat.com>
+		    Marco Falke  <falke.marco@gmail.com>
+
+	PR libstdc++/126949
+	* include/bits/hashtable_policy.h (_Hash_code_base::_M_hash)
+	(_Hashtable_base::_M_equal, _Hashtable_alloc::_M_alloc):
+	Value initialized members in NSDMI.
+	* testsuite/23_containers/unordered_map/cons/default.cc: Check
+	default construction with an hash, equality and allocator with
+	explicit constructor.
+	* testsuite/23_containers/unordered_set/cons/default.cc: Likewise.
+
 2026-09-11  Avi Kivity  <avi@scylladb.com>
 
 	Backported from master: