[gcc r16-8968] Daily bump.

[GCC Administrator]

https://gcc.gnu.org/g:bd18f6c4a6adcd63253f200f7f63377583629916

commit r16-8968-gbd18f6c4a6adcd63253f200f7f63377583629916
Author: GCC Administrator <gccadmin@gcc.gnu.org>
Date:   Thu May 28 00:19:54 2026 +0000

    Daily bump.

Diff:
---
 gcc/ChangeLog          | 9 +++++++++
 gcc/DATESTAMP          | 2 +-
 libstdc++-v3/ChangeLog | 9 +++++++++
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a81fca960696..27a88d08643e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2026-05-27  liuhongt  <hongtao.liu@intel.com>
+
+	Backported from master:
+	2026-05-27  liuhongt  <hongtao.liu@intel.com>
+
+	* config/i386/x86-tune.def (X86_TUNE_USE_GATHER_2PARTS): Disable
+	for m_DIAMONDRAPIDS.
+	(X86_TUNE_USE_GATHER_4PARTS): Likewise.
+
 2026-05-26  Soumya AR  <soumyaa@nvidia.com>
 
 	Backported from master:
diff --git a/gcc/DATESTAMP b/gcc/DATESTAMP
index f756da54533c..70406bf9d422 100644
--- a/gcc/DATESTAMP
+++ b/gcc/DATESTAMP
@@ -1 +1 @@
-20260527
+20260528
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 12520894b479..10d64113f3e9 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,12 @@
+2026-05-27  Jonathan Wakely  <jwakely@redhat.com>
+
+	Backported from master:
+	2026-05-26  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/125450
+	* include/std/optional (range_format): Do not define for
+	freestanding.
+
 2026-05-21  Patrick Palka  <ppalka@redhat.com>
 
 	Backported from master: