[llvm-branch-commits] [clang] [lld] [llvm] [openmp] SystemZ release notes for 18.x. (PR #84560)

[Jonas Paulsson via llvm-branch-commits]

https://github.com/JonPsson1 updated https://github.com/llvm/llvm-project/pull/84560

>From a4534dec8267040d1dc6ab887a20893e302b7300 Mon Sep 17 00:00:00 2001
From: Jonas Paulsson <paulson1 at linux.ibm.com>
Date: Fri, 8 Mar 2024 15:28:56 -0500
Subject: [PATCH] SystemZ release notes. llvm-objcopy and openmp release notes

---
 clang/docs/ReleaseNotes.rst  |  5 +++++
 lld/docs/ReleaseNotes.rst    |  5 +++++
 llvm/docs/ReleaseNotes.rst   | 11 +++++++++++
 openmp/docs/ReleaseNotes.rst |  2 ++
 4 files changed, 23 insertions(+)

diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index fc27297aea2d6c..6a038ed4b635c7 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -1325,6 +1325,11 @@ AIX Support
   or newer. Similar to the LTO support on AIX, ThinLTO is implemented with
   the libLTO.so plugin.
 
+SystemZ Support
+^^^^^^^^^^^^^^^
+- Properly support 16 byte atomic int/fp types and ops. Atomic __int128 (and
+  long double) variables are now aligned to 16 bytes by default (like gcc 14).
+
 WebAssembly Support
 ^^^^^^^^^^^^^^^^^^^
 
diff --git a/lld/docs/ReleaseNotes.rst b/lld/docs/ReleaseNotes.rst
index 56ba3463aeadc0..6ada711a20a6da 100644
--- a/lld/docs/ReleaseNotes.rst
+++ b/lld/docs/ReleaseNotes.rst
@@ -163,5 +163,10 @@ WebAssembly Improvements
   is read from object files within the archive.  This matches the behaviour of
   the ELF linker.
 
+SystemZ
+-------
+
+* Add target support for SystemZ (s390x).
+
 Fixes
 #####
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index 5b3210138f2f89..27d305d36199e7 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -215,6 +215,17 @@ Changes to the RISC-V Backend
 * ``-mcpu=sifive-p670`` was added.
 * Support for the Zicond extension is no longer experimental.
 
+Changes to the SystemZ Backend
+------------------------------
+
+* Properly support 16 byte atomic int/fp types and ops.
+* Support i128 as legal type in VRs.
+* Add an i128 cost model.
+* Support building individual functions with backchain using the
+  __attribute__((target("backchain"))) syntax.
+* Add exception handling for XPLINK.
+* Add support for llvm-objcopy.
+
 Changes to the WebAssembly Backend
 ----------------------------------
 
diff --git a/openmp/docs/ReleaseNotes.rst b/openmp/docs/ReleaseNotes.rst
index 3eeaf5c900d800..a5b39f61b0b64c 100644
--- a/openmp/docs/ReleaseNotes.rst
+++ b/openmp/docs/ReleaseNotes.rst
@@ -19,3 +19,5 @@ from the `LLVM releases web site <https://llvm.org/releases/>`_.
 
 Non-comprehensive list of changes in this release
 =================================================
+
+* SystemZ support added.