From 84b4fd4e5e955f96050ca2705c3f21c1fc593cd1 Mon Sep 17 00:00:00 2001
From: CentOS Sources <bugs@centos.org>
Date: May 19 2022 10:23:40 +0000
Subject: import libomp-14.0.0-2.module+el8.7.0+15272+f8692459


---

diff --git a/SOURCES/fix-strict-aliasing-issue-in-cmpxchg-routine.patch b/SOURCES/fix-strict-aliasing-issue-in-cmpxchg-routine.patch
new file mode 100644
index 0000000..db6ca9c
--- /dev/null
+++ b/SOURCES/fix-strict-aliasing-issue-in-cmpxchg-routine.patch
@@ -0,0 +1,44 @@
+diff --git a/openmp/runtime/src/kmp_os.h b/openmp/runtime/src/kmp_os.h
+--- a/openmp/runtime/src/kmp_os.h
++++ b/openmp/runtime/src/kmp_os.h
+@@ -17,6 +17,7 @@
+ #include <atomic>
+ #include <stdarg.h>
+ #include <stdlib.h>
++#include <string.h>
+ 
+ #define KMP_FTN_PLAIN 1
+ #define KMP_FTN_APPEND 2
+@@ -864,15 +865,25 @@
+   __sync_lock_test_and_set((volatile kmp_uint64 *)(p), (kmp_uint64)(v))
+ 
+ inline kmp_real32 KMP_XCHG_REAL32(volatile kmp_real32 *p, kmp_real32 v) {
+-  kmp_int32 tmp =
+-      __sync_lock_test_and_set((volatile kmp_uint32 *)(p), *(kmp_uint32 *)&v);
+-  return *(kmp_real32 *)&tmp;
++  volatile kmp_uint32 *up;
++  kmp_uint32 uv;
++  memcpy(&up, &p, sizeof(up));
++  memcpy(&uv, &v, sizeof(uv));
++  kmp_int32 tmp = __sync_lock_test_and_set(up, uv);
++  kmp_real32 ftmp;
++  memcpy(&ftmp, &tmp, sizeof(tmp));
++  return ftmp;
+ }
+ 
+ inline kmp_real64 KMP_XCHG_REAL64(volatile kmp_real64 *p, kmp_real64 v) {
+-  kmp_int64 tmp =
+-      __sync_lock_test_and_set((volatile kmp_uint64 *)(p), *(kmp_uint64 *)&v);
+-  return *(kmp_real64 *)&tmp;
++  volatile kmp_uint64 *up;
++  kmp_uint64 uv;
++  memcpy(&up, &p, sizeof(up));
++  memcpy(&uv, &v, sizeof(uv));
++  kmp_int64 tmp = __sync_lock_test_and_set(up, uv);
++  kmp_real64 dtmp;
++  memcpy(&dtmp, &tmp, sizeof(tmp));
++  return dtmp;
+ }
+ 
+ #else
+
diff --git a/SPECS/libomp.spec b/SPECS/libomp.spec
index 8912361..a72dfaa 100644
--- a/SPECS/libomp.spec
+++ b/SPECS/libomp.spec
@@ -11,7 +11,7 @@
 
 Name: libomp
 Version: %{libomp_version}%{?rc_ver:~rc%{rc_ver}}
-Release: 1%{?dist}
+Release: 2%{?dist}
 Summary: OpenMP runtime for clang
 
 License: NCSA
@@ -27,6 +27,8 @@ Patch0: 0001-PATCH-openmp-CMake-Make-LIBOMP_HEADERS_INSTALL_PATH-.patch
 #  the kmp_lock.cpp. Without this patch, GCC errors out with
 #  ../runtime/src/kmp_lock.cpp:2684:1: error: unsupported size for integer register
 Patch1: gcc-workaround.patch
+# https://github.com/llvm/llvm-project/commit/40d3a0ba4d9e5452c0a68cfdaa8e88eb8ed5c63d
+Patch2: fix-strict-aliasing-issue-in-cmpxchg-routine.patch
 
 BuildRequires: gcc
 BuildRequires: gcc-c++
@@ -166,6 +168,10 @@ cd %{_vpath_builddir}
 %{_libexecdir}/tests/libomp/
 
 %changelog
+* Wed May 18 2022 Timm Bäder <tbaeder@redhat.com> - 14.00-2
+- Backport 40d3a0ba4d9e5452c0a68cfdaa8e88eb8ed5c63d to
+  fix a strict aliasing issue.
+
 * Thu Apr 07 2022 Timm Bäder <tbaeder@redhat.com> - 14.0.0-1
 - Update to 14.0.0