Reapply [libomptarget] Build plugins-nextgen for SystemZ (#83978)

The plugin was not getting built as the build_generic_elf64 macro
assumes the LLVM triple processor name matches the CMake processor name,
which is unfortunately not the case for SystemZ.

Fix this by providing two separate arguments instead.

Actually building the plugin exposed a number of other issues causing
various test failures. Specifically, I've had to add the SystemZ target
to
- CompilerInvocation::ParseLangArgs
- linkDevice in ClangLinuxWrapper.cpp
- OMPContext::OMPContext (to set the device_kind_cpu trait)
- LIBOMPTARGET_ALL_TARGETS in libomptarget/CMakeLists.txt
- a check_plugin_target call in libomptarget/src/CMakeLists.txt

Finally, I've had to set a number of test cases to UNSUPPORTED on
s390x-ibm-linux-gnu; all these tests were already marked as UNSUPPORTED
for x86_64-pc-linux-gnu and aarch64-unknown-linux-gnu and are failing on
s390x for what seem to be the same reason.

In addition, this also requires support for BE ELF files in
plugins-nextgen: https://github.com/llvm/llvm-project/pull/85246

37 files changed, 71 insertions, 9 deletions

diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 451bdb9..2d3cbb9 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -4014,6 +4014,7 @@ bool CompilerInvocation::ParseLangArgs(LangOptions &Opts, ArgList &Args,
 
       if (TT.getArch() == llvm::Triple::UnknownArch ||
           !(TT.getArch() == llvm::Triple::aarch64 || TT.isPPC() ||
+            TT.getArch() == llvm::Triple::systemz ||
             TT.getArch() == llvm::Triple::nvptx ||
             TT.getArch() == llvm::Triple::nvptx64 ||
             TT.getArch() == llvm::Triple::amdgcn ||
diff --git a/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp b/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp
index 535ef42..c60be27 100644
--- a/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp
+++ b/clang/tools/clang-linker-wrapper/ClangLinkerWrapper.cpp
@@ -562,6 +562,7 @@ Expected<StringRef> linkDevice(ArrayRef<StringRef> InputFiles,
   case Triple::aarch64_be:
   case Triple::ppc64:
   case Triple::ppc64le:
+  case Triple::systemz:
     return generic::clang(InputFiles, Args);
   default:
     return createStringError(inconvertibleErrorCode(),
diff --git a/llvm/lib/Frontend/OpenMP/OMPContext.cpp b/llvm/lib/Frontend/OpenMP/OMPContext.cpp
index e870c5a..37936d6 100644
--- a/llvm/lib/Frontend/OpenMP/OMPContext.cpp
+++ b/llvm/lib/Frontend/OpenMP/OMPContext.cpp
@@ -44,6 +44,7 @@ OMPContext::OMPContext(bool IsDeviceCompilation, Triple TargetTriple) {
   case Triple::ppcle:
   case Triple::ppc64:
   case Triple::ppc64le:
+  case Triple::systemz:
   case Triple::x86:
   case Triple::x86_64:
     ActiveTraits.set(unsigned(TraitProperty::device_kind_cpu));
diff --git a/openmp/libomptarget/CMakeLists.txt b/openmp/libomptarget/CMakeLists.txt
index a74eff0..b382137 100644
--- a/openmp/libomptarget/CMakeLists.txt
+++ b/openmp/libomptarget/CMakeLists.txt
@@ -56,6 +56,8 @@ set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} x86_64-pc-linux-gnu-L
 set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} nvptx64-nvidia-cuda")
 set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} nvptx64-nvidia-cuda-LTO")
 set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} nvptx64-nvidia-cuda-JIT-LTO")
+set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} s390x-ibm-linux-gnu")
+set (LIBOMPTARGET_ALL_TARGETS "${LIBOMPTARGET_ALL_TARGETS} s390x-ibm-linux-gnu-LTO")
 
 # Once the plugins for the different targets are validated, they will be added to
 # the list of supported targets in the current system.
diff --git a/openmp/libomptarget/plugins-nextgen/CMakeLists.txt b/openmp/libomptarget/plugins-nextgen/CMakeLists.txt
index 3ca0236..b6fc136 100644
--- a/openmp/libomptarget/plugins-nextgen/CMakeLists.txt
+++ b/openmp/libomptarget/plugins-nextgen/CMakeLists.txt
@@ -12,12 +12,15 @@
 
 add_subdirectory(common)
 
-# void build_generic_elf64(string tmachine, string tmachine_name, string tmachine_libname, string elf_machine_id);
+# void build_generic_elf64(string tmachine, string tmachine_name, string tmachine_libname,
+#                          string tmachine_llvm, string tmachine_triple, string elf_machine_id);
 # - build a plugin for an ELF based generic 64-bit target based on libffi.
 # - tmachine: name of the machine processor as used in the cmake build system.
 # - tmachine_name: name of the machine to be printed with the debug messages.
 # - tmachine_libname: machine name to be appended to the plugin library name.
-macro(build_generic_elf64 tmachine tmachine_name tmachine_libname tmachine_triple elf_machine_id)
+# - tmachine_llvm: LLVM triple for the processor
+# - tmachine_triple: GNU target triple
+macro(build_generic_elf64 tmachine tmachine_name tmachine_libname tmachine_llvm tmachine_triple elf_machine_id)
 if(CMAKE_SYSTEM_PROCESSOR MATCHES "${tmachine}$")
   # Define macro to be used as prefix of the runtime messages for this target.
   add_definitions("-DTARGET_NAME=${tmachine_name}")
@@ -30,7 +33,7 @@ if(CMAKE_SYSTEM_PROCESSOR MATCHES "${tmachine}$")
   add_definitions("-DTARGET_ELF_ID=${elf_machine_id}")
 
   # Define target triple
-  add_definitions("-DLIBOMPTARGET_NEXTGEN_GENERIC_PLUGIN_TRIPLE=${tmachine}")
+  add_definitions("-DLIBOMPTARGET_NEXTGEN_GENERIC_PLUGIN_TRIPLE=${tmachine_llvm}")
 
   add_llvm_library("omptarget.rtl.${tmachine_libname}"
     SHARED
diff --git a/openmp/libomptarget/plugins-nextgen/aarch64/CMakeLists.txt b/openmp/libomptarget/plugins-nextgen/aarch64/CMakeLists.txt
index 2c2b753..663ab4d 100644
--- a/openmp/libomptarget/plugins-nextgen/aarch64/CMakeLists.txt
+++ b/openmp/libomptarget/plugins-nextgen/aarch64/CMakeLists.txt
@@ -11,7 +11,7 @@
 ##===----------------------------------------------------------------------===##
 
 if(CMAKE_SYSTEM_NAME MATCHES "Linux")
-  build_generic_elf64("aarch64" "aarch64" "aarch64" "aarch64-unknown-linux-gnu" "183")
+  build_generic_elf64("aarch64" "aarch64" "aarch64" "aarch64" "aarch64-unknown-linux-gnu" "183")
 else()
  libomptarget_say("Not building aarch64 NextGen offloading plugin: machine not found in the system.")
 endif()
diff --git a/openmp/libomptarget/plugins-nextgen/ppc64/CMakeLists.txt b/openmp/libomptarget/plugins-nextgen/ppc64/CMakeLists.txt
index 0cccc9c..77466c1 100644
--- a/openmp/libomptarget/plugins-nextgen/ppc64/CMakeLists.txt
+++ b/openmp/libomptarget/plugins-nextgen/ppc64/CMakeLists.txt
@@ -11,7 +11,7 @@
 ##===----------------------------------------------------------------------===##
 
 if(CMAKE_SYSTEM_NAME MATCHES "Linux")
-  build_generic_elf64("ppc64" "PPC64" "ppc64" "powerpc64-ibm-linux-gnu" "21")
+  build_generic_elf64("ppc64" "PPC64" "ppc64" "ppc64" "powerpc64-ibm-linux-gnu" "21")
 else()
  libomptarget_say("Not building ppc64 NextGen offloading plugin: machine not found in the system.")
 endif()
diff --git a/openmp/libomptarget/plugins-nextgen/ppc64le/CMakeLists.txt b/openmp/libomptarget/plugins-nextgen/ppc64le/CMakeLists.txt
index 9461d79..91d2162 100644
--- a/openmp/libomptarget/plugins-nextgen/ppc64le/CMakeLists.txt
+++ b/openmp/libomptarget/plugins-nextgen/ppc64le/CMakeLists.txt
@@ -11,7 +11,7 @@
 ##===----------------------------------------------------------------------===##
 
 if(CMAKE_SYSTEM_NAME MATCHES "Linux")
-  build_generic_elf64("ppc64le" "PPC64le" "ppc64" "powerpc64le-ibm-linux-gnu" "21")
+  build_generic_elf64("ppc64le" "PPC64le" "ppc64" "ppc64le" "powerpc64le-ibm-linux-gnu" "21")
 else()
  libomptarget_say("Not building ppc64le NextGen offloading plugin: machine not found in the system.")
 endif()
diff --git a/openmp/libomptarget/plugins-nextgen/s390x/CMakeLists.txt b/openmp/libomptarget/plugins-nextgen/s390x/CMakeLists.txt
index 1b12a29..0388a23 100644
--- a/openmp/libomptarget/plugins-nextgen/s390x/CMakeLists.txt
+++ b/openmp/libomptarget/plugins-nextgen/s390x/CMakeLists.txt
@@ -11,7 +11,7 @@
 ##===----------------------------------------------------------------------===##
 
 if(CMAKE_SYSTEM_NAME MATCHES "Linux")
- build_generic_elf64("SystemZ" "S390X" "s390x" "s390x-ibm-linux-gnu" "22")
+ build_generic_elf64("s390x" "S390X" "s390x" "systemz" "s390x-ibm-linux-gnu" "22")
 else()
  libomptarget_say("Not building s390x NextGen offloading plugin: machine not found in the system.")
 endif()
diff --git a/openmp/libomptarget/plugins-nextgen/x86_64/CMakeLists.txt b/openmp/libomptarget/plugins-nextgen/x86_64/CMakeLists.txt
index 129d526..27cf3e0 100644
--- a/openmp/libomptarget/plugins-nextgen/x86_64/CMakeLists.txt
+++ b/openmp/libomptarget/plugins-nextgen/x86_64/CMakeLists.txt
@@ -11,7 +11,7 @@
 ##===----------------------------------------------------------------------===##
 
 if(CMAKE_SYSTEM_NAME MATCHES "Linux")
-  build_generic_elf64("x86_64" "x86_64" "x86_64" "x86_64-pc-linux-gnu" "62")
+  build_generic_elf64("x86_64" "x86_64" "x86_64" "x86_64" "x86_64-pc-linux-gnu" "62")
 else()
  libomptarget_say("Not building x86_64 NextGen offloading plugin: machine not found in the system.")
 endif()
diff --git a/openmp/libomptarget/src/CMakeLists.txt b/openmp/libomptarget/src/CMakeLists.txt
index 9bc3f333..d0971bd 100644
--- a/openmp/libomptarget/src/CMakeLists.txt
+++ b/openmp/libomptarget/src/CMakeLists.txt
@@ -73,6 +73,7 @@ if (NOT LIBOMPTARGET_PLUGINS_TO_LOAD)
 	check_plugin_target(cuda)
 	check_plugin_target(aarch64)
 	check_plugin_target(amdgpu)
+	check_plugin_target(s390x)
 endif()
 
 list(TRANSFORM LIBOMPTARGET_PLUGINS_TO_LOAD PREPEND "\"libomptarget.rtl.")
diff --git a/openmp/libomptarget/test/api/omp_dynamic_shared_memory.c b/openmp/libomptarget/test/api/omp_dynamic_shared_memory.c
index 5095a69..3fe75f2 100644
--- a/openmp/libomptarget/test/api/omp_dynamic_shared_memory.c
+++ b/openmp/libomptarget/test/api/omp_dynamic_shared_memory.c
@@ -10,6 +10,8 @@
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
 // UNSUPPORTED: aarch64-unknown-linux-gnu
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <omp.h>
 #include <stdio.h>
diff --git a/openmp/libomptarget/test/jit/empty_kernel_lvl1.c b/openmp/libomptarget/test/jit/empty_kernel_lvl1.c
index c908c8b..a0b8cd4 100644
--- a/openmp/libomptarget/test/jit/empty_kernel_lvl1.c
+++ b/openmp/libomptarget/test/jit/empty_kernel_lvl1.c
@@ -32,5 +32,7 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include "empty_kernel.inc"
diff --git a/openmp/libomptarget/test/jit/empty_kernel_lvl2.c b/openmp/libomptarget/test/jit/empty_kernel_lvl2.c
index 0b88d33..81a04f5 100644
--- a/openmp/libomptarget/test/jit/empty_kernel_lvl2.c
+++ b/openmp/libomptarget/test/jit/empty_kernel_lvl2.c
@@ -92,5 +92,7 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include "empty_kernel.inc"
diff --git a/openmp/libomptarget/test/jit/type_punning.c b/openmp/libomptarget/test/jit/type_punning.c
index 23aa69b..10e3d2c 100644
--- a/openmp/libomptarget/test/jit/type_punning.c
+++ b/openmp/libomptarget/test/jit/type_punning.c
@@ -12,6 +12,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 // Ensure that there is only the kernel function left, not any outlined
 // parallel regions.
diff --git a/openmp/libomptarget/test/mapping/auto_zero_copy.cpp b/openmp/libomptarget/test/mapping/auto_zero_copy.cpp
index 6f9d8c2..4664120 100644
--- a/openmp/libomptarget/test/mapping/auto_zero_copy.cpp
+++ b/openmp/libomptarget/test/mapping/auto_zero_copy.cpp
@@ -13,6 +13,8 @@
 // UNSUPPORTED: nvptx64-nvidia-cuda-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 // REQUIRES: unified_shared_memory
 
diff --git a/openmp/libomptarget/test/mapping/auto_zero_copy_globals.cpp b/openmp/libomptarget/test/mapping/auto_zero_copy_globals.cpp
index 4a13d27..55dfb28 100644
--- a/openmp/libomptarget/test/mapping/auto_zero_copy_globals.cpp
+++ b/openmp/libomptarget/test/mapping/auto_zero_copy_globals.cpp
@@ -9,6 +9,8 @@
 // UNSUPPORTED: nvptx64-nvidia-cuda-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 // REQUIRES: unified_shared_memory
 
diff --git a/openmp/libomptarget/test/offloading/barrier_fence.c b/openmp/libomptarget/test/offloading/barrier_fence.c
index 3eeaac5..9c3027f 100644
--- a/openmp/libomptarget/test/offloading/barrier_fence.c
+++ b/openmp/libomptarget/test/offloading/barrier_fence.c
@@ -11,6 +11,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <omp.h>
 #include <stdio.h>
diff --git a/openmp/libomptarget/test/offloading/bug49334.cpp b/openmp/libomptarget/test/offloading/bug49334.cpp
index a22d3fe..1f19dab 100644
--- a/openmp/libomptarget/test/offloading/bug49334.cpp
+++ b/openmp/libomptarget/test/offloading/bug49334.cpp
@@ -9,6 +9,8 @@
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
 // UNSUPPORTED: aarch64-unknown-linux-gnu
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 // UNSUPPORTED: amdgcn-amd-amdhsa
 // UNSUPPORTED: nvptx64-nvidia-cuda
 // UNSUPPORTED: nvptx64-nvidia-cuda-LTO
diff --git a/openmp/libomptarget/test/offloading/default_thread_limit.c b/openmp/libomptarget/test/offloading/default_thread_limit.c
index d32e7df..4da02bb 100644
--- a/openmp/libomptarget/test/offloading/default_thread_limit.c
+++ b/openmp/libomptarget/test/offloading/default_thread_limit.c
@@ -9,6 +9,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 __attribute__((optnone)) int optnone() { return 1; }
 
diff --git a/openmp/libomptarget/test/offloading/ompx_bare.c b/openmp/libomptarget/test/offloading/ompx_bare.c
index fb3810b..3dabdcd 100644
--- a/openmp/libomptarget/test/offloading/ompx_bare.c
+++ b/openmp/libomptarget/test/offloading/ompx_bare.c
@@ -1,10 +1,13 @@
 // RUN: %libomptarget-compile-generic
-// RUN: env LIBOMPTARGET_INFO=63 %libomptarget-run-generic 2>&1 | %fcheck-generic
+// RUN: env LIBOMPTARGET_INFO=63 %libomptarget-run-generic 2>&1 | \
+// RUN:   %fcheck-generic
 //
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
 // UNSUPPORTED: aarch64-unknown-linux-gnu
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <assert.h>
 #include <ompx.h>
diff --git a/openmp/libomptarget/test/offloading/ompx_coords.c b/openmp/libomptarget/test/offloading/ompx_coords.c
index 61dad61..5e4e14b 100644
--- a/openmp/libomptarget/test/offloading/ompx_coords.c
+++ b/openmp/libomptarget/test/offloading/ompx_coords.c
@@ -4,6 +4,8 @@
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
 // UNSUPPORTED: aarch64-unknown-linux-gnu
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <omp.h>
 #include <ompx.h>
diff --git a/openmp/libomptarget/test/offloading/ompx_saxpy_mixed.c b/openmp/libomptarget/test/offloading/ompx_saxpy_mixed.c
index 440b694..f479be8 100644
--- a/openmp/libomptarget/test/offloading/ompx_saxpy_mixed.c
+++ b/openmp/libomptarget/test/offloading/ompx_saxpy_mixed.c
@@ -4,6 +4,8 @@
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
 // UNSUPPORTED: aarch64-unknown-linux-gnu
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <math.h>
 #include <omp.h>
diff --git a/openmp/libomptarget/test/offloading/parallel_target_teams_reduction.cpp b/openmp/libomptarget/test/offloading/parallel_target_teams_reduction.cpp
index 5303a94..10e1b33 100644
--- a/openmp/libomptarget/test/offloading/parallel_target_teams_reduction.cpp
+++ b/openmp/libomptarget/test/offloading/parallel_target_teams_reduction.cpp
@@ -6,6 +6,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <iostream>
 #include <vector>
diff --git a/openmp/libomptarget/test/offloading/small_trip_count.c b/openmp/libomptarget/test/offloading/small_trip_count.c
index d8bef66..65f094f 100644
--- a/openmp/libomptarget/test/offloading/small_trip_count.c
+++ b/openmp/libomptarget/test/offloading/small_trip_count.c
@@ -9,6 +9,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #define N 128
 
diff --git a/openmp/libomptarget/test/offloading/small_trip_count_thread_limit.cpp b/openmp/libomptarget/test/offloading/small_trip_count_thread_limit.cpp
index 9796c2d..b7ae52a 100644
--- a/openmp/libomptarget/test/offloading/small_trip_count_thread_limit.cpp
+++ b/openmp/libomptarget/test/offloading/small_trip_count_thread_limit.cpp
@@ -7,6 +7,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 int main(int argc, char *argv[]) {
   constexpr const int block_size = 256;
diff --git a/openmp/libomptarget/test/offloading/spmdization.c b/openmp/libomptarget/test/offloading/spmdization.c
index 2cf30ff..77913be 100644
--- a/openmp/libomptarget/test/offloading/spmdization.c
+++ b/openmp/libomptarget/test/offloading/spmdization.c
@@ -11,6 +11,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 #include <omp.h>
 #include <stdio.h>
diff --git a/openmp/libomptarget/test/offloading/target_critical_region.cpp b/openmp/libomptarget/test/offloading/target_critical_region.cpp
index 9a741be..495632b 100644
--- a/openmp/libomptarget/test/offloading/target_critical_region.cpp
+++ b/openmp/libomptarget/test/offloading/target_critical_region.cpp
@@ -6,6 +6,8 @@
 // UNSUPPORTED: nvptx64-nvidia-cuda-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 // UNSUPPORTED: amdgcn-amd-amdhsa
 
 #include <omp.h>
diff --git a/openmp/libomptarget/test/offloading/thread_limit.c b/openmp/libomptarget/test/offloading/thread_limit.c
index 65275a8..a8cc51b 100644
--- a/openmp/libomptarget/test/offloading/thread_limit.c
+++ b/openmp/libomptarget/test/offloading/thread_limit.c
@@ -9,6 +9,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 int main() {
   int n = 1 << 20;
diff --git a/openmp/libomptarget/test/ompt/target_memcpy.c b/openmp/libomptarget/test/ompt/target_memcpy.c
index 80a8d6a..3224c5a 100644
--- a/openmp/libomptarget/test/ompt/target_memcpy.c
+++ b/openmp/libomptarget/test/ompt/target_memcpy.c
@@ -4,6 +4,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Verify that for the target OpenMP APIs, the return address is non-null and
diff --git a/openmp/libomptarget/test/ompt/target_memcpy_emi.c b/openmp/libomptarget/test/ompt/target_memcpy_emi.c
index 5347f38..fd7da13 100644
--- a/openmp/libomptarget/test/ompt/target_memcpy_emi.c
+++ b/openmp/libomptarget/test/ompt/target_memcpy_emi.c
@@ -4,6 +4,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Verify all three data transfer directions: H2D, D2D and D2H
diff --git a/openmp/libomptarget/test/ompt/veccopy.c b/openmp/libomptarget/test/ompt/veccopy.c
index 80e71fd..bc70f5a 100644
--- a/openmp/libomptarget/test/ompt/veccopy.c
+++ b/openmp/libomptarget/test/ompt/veccopy.c
@@ -4,6 +4,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that registers non-EMI callbacks
diff --git a/openmp/libomptarget/test/ompt/veccopy_data.c b/openmp/libomptarget/test/ompt/veccopy_data.c
index cef1de3..264b484 100644
--- a/openmp/libomptarget/test/ompt/veccopy_data.c
+++ b/openmp/libomptarget/test/ompt/veccopy_data.c
@@ -4,6 +4,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that registers EMI callbacks.
diff --git a/openmp/libomptarget/test/ompt/veccopy_disallow_both.c b/openmp/libomptarget/test/ompt/veccopy_disallow_both.c
index 06293e4..a011c21 100644
--- a/openmp/libomptarget/test/ompt/veccopy_disallow_both.c
+++ b/openmp/libomptarget/test/ompt/veccopy_disallow_both.c
@@ -4,6 +4,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that shows that both EMI and non-EMI
diff --git a/openmp/libomptarget/test/ompt/veccopy_emi.c b/openmp/libomptarget/test/ompt/veccopy_emi.c
index b597d7b..8718a39 100644
--- a/openmp/libomptarget/test/ompt/veccopy_emi.c
+++ b/openmp/libomptarget/test/ompt/veccopy_emi.c
@@ -4,6 +4,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that registers EMI callbacks
diff --git a/openmp/libomptarget/test/ompt/veccopy_emi_map.c b/openmp/libomptarget/test/ompt/veccopy_emi_map.c
index ce6f6e3..2accba3 100644
--- a/openmp/libomptarget/test/ompt/veccopy_emi_map.c
+++ b/openmp/libomptarget/test/ompt/veccopy_emi_map.c
@@ -4,6 +4,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that shows that map-EMI callbacks are not supported.
diff --git a/openmp/libomptarget/test/ompt/veccopy_map.c b/openmp/libomptarget/test/ompt/veccopy_map.c
index 83f63a6..56a0dd4 100644
--- a/openmp/libomptarget/test/ompt/veccopy_map.c
+++ b/openmp/libomptarget/test/ompt/veccopy_map.c
@@ -4,6 +4,8 @@
 // UNSUPPORTED: aarch64-unknown-linux-gnu-LTO
 // UNSUPPORTED: x86_64-pc-linux-gnu
 // UNSUPPORTED: x86_64-pc-linux-gnu-LTO
+// UNSUPPORTED: s390x-ibm-linux-gnu
+// UNSUPPORTED: s390x-ibm-linux-gnu-LTO
 
 /*
  * Example OpenMP program that shows that map callbacks are not supported.