Update OpenMP from LLVM 1823581ecb to 22.1.8 (emscripten-core#27437)

This updates (?) OpenMP from 1823581ecb to LLVM 22.1.8:
https://github.com/llvm/llvm-project/releases/tag/llvmorg-22.1.8

Because emscripten-core#27073 added OpenMP from then-LLVM-tot 1823581ecb, this is
effectively not updating but downgrading to make this in sync with our
other LLVM libraries.

All `./test/runner *.test_openmp_max_threads` pass, except for
`strict.test_openmp_max_threads`, which also fails in the main branch.

Additional changes:

- Apply the fix from emscripten-core#27289:
emscripten-core@8f254a0

- Remove `kmp_invoke_microtask.cpp` from build:
emscripten-core@b104d06
This file was added in llvm/llvm-project#176151
and didn't exist in LLVM 22.1.8 release.

Author: aheejin

ChangeLog.md

@@ -26,6 +26,7 @@ See docs/process.md for more on how version tagging works.
 - Revert #27397, which changed the way config keys such as NODE_JS were parsed
   when reading the config file.  This change broke emsdk installations that
   contained spaces. (#27421)
+- OpenMP was updated to LLVM 22.1.8 (#27437)
 
 6.0.4 - 07/24/26
 ----------------

system/lib/openmp/README.md

@@ -1,17 +1,14 @@
 llvm's OpenMP
 -------------
 
-Note: This version of openmp is actually based on 1823581ecb but
-we are in the process of updating it.
-
-These files are from the llvm-project based on release 21.1.8.
+These files are from the llvm-project based on release 22.1.8.
 
 We maintain a local fork of llvm-project that contains any Emscripten
 specific patches:
 
   https://github.com/emscripten-core/llvm-project
 
-The current patch is based on the emscripten-libs-21 branch.
+The current patch is based on the emscripten-libs-22 branch.
 
 Update Instructions
 -------------------
@@ -23,4 +20,4 @@ Modifications
 
 For a list of changes from upstream see the OpenMP files that are part of:
 
-https://github.com/llvm/llvm-project/compare/llvmorg-21.1.8...emscripten-core:emscripten-libs-21
+https://github.com/llvm/llvm-project/compare/llvmorg-22.1.8...emscripten-core:emscripten-libs-22

system/lib/openmp/include/omp.h

@@ -380,11 +380,6 @@
         omp_uintptr_t value;
     } omp_alloctrait_t;
 
-    typedef enum {
-        omp_access_cgroup = 0,
-        omp_access_pteam = 1
-    } omp_access_t;
-
 #   if defined(_WIN32)
     // On Windows cl and icl do not support 64-bit enum, let's use integer then.
     typedef omp_uintptr_t omp_allocator_handle_t;
@@ -408,7 +403,6 @@
     extern __KMP_IMP omp_memspace_handle_t const omp_const_mem_space;
     extern __KMP_IMP omp_memspace_handle_t const omp_high_bw_mem_space;
     extern __KMP_IMP omp_memspace_handle_t const omp_low_lat_mem_space;
-    extern __KMP_IMP omp_memspace_handle_t const omp_cgroup_mem_space;
     extern __KMP_IMP omp_memspace_handle_t const llvm_omp_target_host_mem_space;
     extern __KMP_IMP omp_memspace_handle_t const llvm_omp_target_shared_mem_space;
     extern __KMP_IMP omp_memspace_handle_t const llvm_omp_target_device_mem_space;
@@ -445,7 +439,6 @@
       omp_const_mem_space = 2,
       omp_high_bw_mem_space = 3,
       omp_low_lat_mem_space = 4,
-      omp_cgroup_mem_space = 5,
       llvm_omp_target_host_mem_space = 100,
       llvm_omp_target_shared_mem_space = 101,
       llvm_omp_target_device_mem_space = 102,
@@ -470,11 +463,6 @@
                                                    omp_allocator_handle_t allocator = omp_null_allocator,
                                                    omp_allocator_handle_t free_allocator = omp_null_allocator);
     extern void __KAI_KMPC_CONVENTION omp_free(void * ptr, omp_allocator_handle_t a = omp_null_allocator);
-    extern void *__KAI_KMPC_CONVENTION omp_get_dyn_gprivate_ptr(size_t offset = 0, omp_access_t access_group = omp_access_cgroup);
-    extern void *__KAI_KMPC_CONVENTION omp_get_dyn_gprivate_nofb_ptr(size_t offset = 0, omp_access_t access_group = omp_access_cgroup);
-    extern size_t __KAI_KMPC_CONVENTION omp_get_dyn_gprivate_size(omp_access_t access_group = omp_access_cgroup);
-    extern omp_memspace_handle_t __KAI_KMPC_CONVENTION omp_get_dyn_gprivate_memspace(omp_access_t access_group = omp_access_cgroup);
-    extern size_t __KAI_KMPC_CONVENTION omp_get_gprivate_limit(int device_num, omp_access_t access_group = omp_access_cgroup);
 #   else
     extern void *__KAI_KMPC_CONVENTION omp_alloc(size_t size, omp_allocator_handle_t a);
     extern void *__KAI_KMPC_CONVENTION omp_aligned_alloc(size_t align, size_t size,
@@ -485,11 +473,6 @@
     extern void *__KAI_KMPC_CONVENTION omp_realloc(void *ptr, size_t size, omp_allocator_handle_t allocator,
                                                    omp_allocator_handle_t free_allocator);
     extern void __KAI_KMPC_CONVENTION omp_free(void *ptr, omp_allocator_handle_t a);
-    extern void *__KAI_KMPC_CONVENTION omp_get_dyn_gprivate_ptr(size_t offset, omp_access_t access_group);
-    extern void *__KAI_KMPC_CONVENTION omp_get_dyn_gprivate_nofb_ptr(size_t offset, omp_access_t access_group);
-    extern size_t __KAI_KMPC_CONVENTION omp_get_dyn_gprivate_size(omp_access_t access_group);
-    extern omp_memspace_handle_t __KAI_KMPC_CONVENTION omp_get_dyn_gprivate_memspace(omp_access_t access_group);
-    extern size_t __KAI_KMPC_CONVENTION omp_get_gprivate_limit(int device_num, omp_access_t access_group);
 #   endif
 
     /* OpenMP TR11 routines to get memory spaces and allocators */
@@ -553,7 +536,6 @@
 
     /* OpenMP 5.2 */
     extern int __KAI_KMPC_CONVENTION omp_in_explicit_task(void);
-    #define omp_initial_device -1
     #define omp_invalid_device -2
 
     /* OpenMP 6.0 */

system/lib/openmp/include/ompx.h

@@ -9,7 +9,7 @@
 #ifndef __OMPX_H
 #define __OMPX_H
 
-#if (defined(__NVPTX__) || defined(__AMDGPU__) || defined(__SPIRV__))
+#if (defined(__NVPTX__) || defined(__AMDGPU__))
 #include <gpuintrin.h>
 #define __OMPX_TARGET_IS_GPU
 #endif

system/lib/openmp/prebuilt/kmp_config.h

@@ -46,8 +46,8 @@
 #define OMPT_SUPPORT LIBOMP_OMPT_SUPPORT
 #define LIBOMP_OMPD_SUPPORT 0
 #define OMPD_SUPPORT LIBOMP_OMPD_SUPPORT
-#define LIBOMP_TASKGRAPH_EXPERIMENTAL 0
-#define OMP_TASKGRAPH_EXPERIMENTAL LIBOMP_TASKGRAPH_EXPERIMENTAL
+#define LIBOMP_OMPX_TASKGRAPH 0
+#define OMPX_TASKGRAPH LIBOMP_OMPX_TASKGRAPH
 #define LIBOMP_PROFILING_SUPPORT 0
 #define OMP_PROFILING_SUPPORT LIBOMP_PROFILING_SUPPORT
 #define LIBOMP_OMPT_OPTIONAL 1
@@ -96,8 +96,6 @@
 #define KMP_HAVE_POSIX_MEMALIGN LIBOMP_HAVE_POSIX_MEMALIGN
 #define LIBOMP_HAVE__ALIGNED_MALLOC 0
 #define KMP_HAVE__ALIGNED_MALLOC LIBOMP_HAVE__ALIGNED_MALLOC
-#define LIBOMP_USE_CANCEL_THREADS 1
-#define KMP_CANCEL_THREADS LIBOMP_USE_CANCEL_THREADS
 #define OPENMP_ENABLE_LIBOMPTARGET 0
 #define ENABLE_LIBOMPTARGET OPENMP_ENABLE_LIBOMPTARGET
 

system/lib/openmp/prebuilt/kmp_i18n_default.inc

@@ -417,8 +417,6 @@ __kmp_i18n_default_messages[] =
         "Target memory not available, will use default allocator.",
         "%1$s ignored: This machine is not a hybrid architecutre. Using \"%2$s\" instead.",
         "%1$s ignored: %2$s is not available. Using \"%3$s\" instead.",
-        "%1$s() called inside a parallel or teams region; call ignored.",
-        "%1$s() called inside a parallel or teams region; call ignored.",
         NULL
     };
 
@@ -471,7 +469,7 @@ __kmp_i18n_sections[] =
         { 5, __kmp_i18n_default_meta },
         { 79, __kmp_i18n_default_strings },
         { 6, __kmp_i18n_default_formats },
-        { 303, __kmp_i18n_default_messages },
+        { 301, __kmp_i18n_default_messages },
         { 29, __kmp_i18n_default_hints },
         { 0, NULL }
     };

system/lib/openmp/prebuilt/kmp_i18n_id.inc

@@ -411,8 +411,6 @@ enum kmp_i18n_id {
     kmp_i18n_msg_TargetMemNotAvailable,
     kmp_i18n_msg_AffIgnoringNonHybrid,
     kmp_i18n_msg_AffIgnoringNotAvailable,
-    kmp_i18n_msg_SetNumTeamsInParOrTeamsRegion,
-    kmp_i18n_msg_SetTeamsThreadLimitInParOrTeamsRegion,
     kmp_i18n_msg_last,
 
     // Set #5, hints.

system/lib/openmp/src/CMakeLists.txt

@@ -22,7 +22,7 @@ endif()
 configure_file(${LIBOMP_INC_DIR}/omp.h.var ${LIBOMP_HEADERS_INTDIR}/omp.h @ONLY)
 configure_file(${LIBOMP_INC_DIR}/ompx.h.var ${LIBOMP_HEADERS_INTDIR}/ompx.h @ONLY)
 configure_file(kmp_config.h.cmake kmp_config.h @ONLY)
-if(LIBOMP_OMPT_SUPPORT)
+if(${LIBOMP_OMPT_SUPPORT})
   configure_file(${LIBOMP_INC_DIR}/omp-tools.h.var ${LIBOMP_HEADERS_INTDIR}/omp-tools.h @ONLY)
 endif()
 
@@ -81,13 +81,11 @@ if(STUBS_LIBRARY)
 else()
   # Get C++ files
   set(LIBOMP_CXXFILES
-    kmp_adt.cpp
     kmp_alloc.cpp
     kmp_atomic.cpp
     kmp_csupport.cpp
     kmp_debug.cpp
     kmp_itt.cpp
-    kmp_invoke_microtask.cpp
     kmp_environment.cpp
     kmp_error.cpp
     kmp_global.cpp
@@ -111,9 +109,9 @@ else()
     # Windows specific files
     libomp_append(LIBOMP_CXXFILES z_Windows_NT_util.cpp)
     libomp_append(LIBOMP_CXXFILES z_Windows_NT-586_util.cpp)
-    if(LIBOMP_ARCH STREQUAL "i386" OR LIBOMP_ARCH STREQUAL "x86_64")
+    if(${LIBOMP_ARCH} STREQUAL "i386" OR ${LIBOMP_ARCH} STREQUAL "x86_64")
       libomp_append(LIBOMP_ASMFILES z_Windows_NT-586_asm.asm) # Windows assembly file
-    elseif((LIBOMP_ARCH STREQUAL "aarch64" OR LIBOMP_ARCH STREQUAL "arm") AND (NOT MSVC OR CMAKE_C_COMPILER_ID STREQUAL "Clang"))
+    elseif((${LIBOMP_ARCH} STREQUAL "aarch64" OR ${LIBOMP_ARCH} STREQUAL "arm") AND (NOT MSVC OR CMAKE_C_COMPILER_ID STREQUAL "Clang"))
       # z_Linux_asm.S works for AArch64 and ARM Windows too.
       libomp_append(LIBOMP_GNUASMFILES z_Linux_asm.S)
     else()
@@ -176,7 +174,7 @@ libomp_get_libflags(LIBOMP_CONFIGURED_LIBFLAGS)
 
 # Build libomp library. Add LLVMSupport dependency if building in-tree with
 # libomptarget profiling enabled.
-if(NOT OPENMP_ENABLE_LIBOMP_PROFILING)
+if(OPENMP_STANDALONE_BUILD OR (NOT OPENMP_ENABLE_LIBOMP_PROFILING))
   add_library(omp ${LIBOMP_LIBRARY_KIND} $<TARGET_OBJECTS:obj.omp>)
   set_property(TARGET omp PROPERTY FOLDER "OpenMP/Libraries")
   # Linking command will include libraries in LIBOMP_CONFIGURED_LIBFLAGS
@@ -190,10 +188,7 @@ else()
   # libomp must be a C++ library such that it can link libLLVMSupport
   set(LIBOMP_LINKER_LANGUAGE CXX)
 endif()
-
-openmp_register_meta_dep(omp)
-
-if(LIBOMP_USE_HWLOC)
+if(${LIBOMP_USE_HWLOC})
   # Since we are using an OBJECT library, the PRIVATE and INTERFACE options are split
   # (instead of using PUBLIC): obj.omp for compiling itself, omp for propagating
   # the options to other libraries that depend on it, e.g. libompd.
@@ -385,15 +380,15 @@ if(WIN32)
 endif()
 
 # Move files to exports/ directory if requested
-if(LIBOMP_COPY_EXPORTS)
+if(${LIBOMP_COPY_EXPORTS})
   include(LibompExports)
 endif()
 
 # Micro test rules for after library has been built (cmake/LibompMicroTests.cmake)
 include(LibompMicroTests)
 add_custom_target(libomp-micro-tests)
 set_target_properties(libomp-micro-tests PROPERTIES FOLDER "OpenMP/Tests")
-if(NOT MIC AND NOT CMAKE_CROSSCOMPILING)
+if(NOT ${MIC} AND NOT CMAKE_CROSSCOMPILING)
   add_dependencies(libomp-micro-tests libomp-test-touch)
 endif()
 if(NOT WIN32 AND NOT APPLE)
@@ -406,29 +401,31 @@ add_dependencies(libomp-micro-tests libomp-test-deps)
 
 # `omp` needs to be exported if in-tree build.
 set(export_to_llvmexports)
-get_target_export_arg(omp LLVM export_to_llvmexports)
-set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS omp)
+if (NOT OPENMP_STANDALONE_BUILD)
+  get_target_export_arg(omp LLVM export_to_llvmexports)
+  set_property(GLOBAL APPEND PROPERTY LLVM_EXPORTS omp)
+endif()
 
 # Install rules
 # We want to install libomp in ${DESTDIR}/${CMAKE_INSTALL_FULL_LIBDIR}
 # We want to install headers in ${DESTDIR}/${CMAKE_INSTALL_FULL_INCLUDEDIR}
 if(WIN32)
-  install(TARGETS omp ${export_to_llvmexports} RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}" COMPONENT openmp)
-  install(TARGETS ${LIBOMP_IMP_LIB_TARGET} ARCHIVE DESTINATION "${OPENMP_INSTALL_LIBDIR}" COMPONENT openmp)
+  install(TARGETS omp ${export_to_llvmexports} RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
+  install(TARGETS ${LIBOMP_IMP_LIB_TARGET} ARCHIVE DESTINATION "${OPENMP_INSTALL_LIBDIR}")
   # Create aliases (regular copies) of the library for backwards compatibility
   set(LIBOMP_ALIASES "libiomp5md")
   foreach(alias IN LISTS LIBOMP_ALIASES)
     install(CODE "execute_process(COMMAND \"\${CMAKE_COMMAND}\" -E copy \"${LIBOMP_LIB_FILE}\"
-      \"${alias}${LIBOMP_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \"${CMAKE_INSTALL_FULL_BINDIR}\")" COMPONENT openmp)
+      \"${alias}${LIBOMP_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \"${CMAKE_INSTALL_FULL_BINDIR}\")")
     extend_path(outdir "${CMAKE_INSTALL_PREFIX}" "${OPENMP_INSTALL_LIBDIR}")
     install(CODE "execute_process(COMMAND \"\${CMAKE_COMMAND}\" -E copy \"${LIBOMP_IMP_LIB_FILE}\"
-      \"${alias}${CMAKE_STATIC_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \"${outdir}\")" COMPONENT openmp)
+      \"${alias}${CMAKE_STATIC_LIBRARY_SUFFIX}\" WORKING_DIRECTORY \"${outdir}\")")
   endforeach()
 else()
 
-  install(TARGETS omp ${export_to_llvmexports} ${LIBOMP_INSTALL_KIND} DESTINATION "${OPENMP_INSTALL_LIBDIR}" COMPONENT openmp)
+  install(TARGETS omp ${export_to_llvmexports} ${LIBOMP_INSTALL_KIND} DESTINATION "${OPENMP_INSTALL_LIBDIR}")
 
-  if(LIBOMP_INSTALL_ALIASES)
+  if(${LIBOMP_INSTALL_ALIASES})
     # Create aliases (symlinks) of the library for backwards compatibility
     extend_path(outdir "${CMAKE_INSTALL_PREFIX}" "${OPENMP_INSTALL_LIBDIR}")
     if(AIX)
@@ -441,12 +438,12 @@ else()
     foreach(alias IN LISTS LIBOMP_ALIASES)
       install(CODE "execute_process(COMMAND \"\${CMAKE_COMMAND}\" -E create_symlink \"${LIBOMP_LIB_NAME}${LIBRARY_SUFFIX}\"
         \"${alias}${LIBRARY_SUFFIX}\" WORKING_DIRECTORY
-        \"\$ENV{DESTDIR}${outdir}\")" COMPONENT openmp)
+        \"\$ENV{DESTDIR}${outdir}\")")
     endforeach()
     if(LIBOMP_ENABLE_SHARED AND NOT AIX)
       install(CODE "execute_process(COMMAND \"\${CMAKE_COMMAND}\" -E create_symlink \"${LIBOMP_LIB_FILE}\"
         \"${VERSIONED_LIBGOMP_NAME}\" WORKING_DIRECTORY
-        \"\$ENV{DESTDIR}${outdir}\")" COMPONENT openmp)
+        \"\$ENV{DESTDIR}${outdir}\")")
     endif()
   endif()
 endif()
@@ -455,11 +452,10 @@ install(
   ${LIBOMP_HEADERS_INTDIR}/omp.h
   ${LIBOMP_HEADERS_INTDIR}/ompx.h
   DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH}
-  COMPONENT openmp
 )
-if(LIBOMP_OMPT_SUPPORT)
-  install(FILES ${LIBOMP_HEADERS_INTDIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH} COMPONENT openmp)
+if(${LIBOMP_OMPT_SUPPORT})
+  install(FILES ${LIBOMP_HEADERS_INTDIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH})
   # install under legacy name ompt.h
-  install(FILES ${LIBOMP_HEADERS_INTDIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH} RENAME ompt.h COMPONENT openmp)
+  install(FILES ${LIBOMP_HEADERS_INTDIR}/omp-tools.h DESTINATION ${LIBOMP_HEADERS_INSTALL_PATH} RENAME ompt.h)
   set(LIBOMP_OMP_TOOLS_INCLUDE_DIR ${CMAKE_CURRENT_BINARY_DIR} PARENT_SCOPE)
 endif()

system/lib/openmp/src/dllexports

@@ -607,7 +607,6 @@ kmp_set_disp_num_buffers                    890
     llvm_omp_target_shared_mem_space       DATA
     llvm_omp_target_device_mem_space       DATA
     omp_null_mem_space                     DATA
-    omp_cgroup_mem_space                   DATA
 
 %ifndef stub
     # Ordinals between 900 and 999 are reserved

system/lib/openmp/src/i18n/en_US.txt

@@ -482,8 +482,6 @@ AffHWSubsetIgnoringAttr      "KMP_HW_SUBSET: ignoring %1$s attribute. This machi
 TargetMemNotAvailable        "Target memory not available, will use default allocator."
 AffIgnoringNonHybrid         "%1$s ignored: This machine is not a hybrid architecutre. Using \"%2$s\" instead."
 AffIgnoringNotAvailable      "%1$s ignored: %2$s is not available. Using \"%3$s\" instead."
-SetNumTeamsInParOrTeamsRegion "%1$s() called inside a parallel or teams region; call ignored."
-SetTeamsThreadLimitInParOrTeamsRegion "%1$s() called inside a parallel or teams region; call ignored."
 
 # --------------------------------------------------------------------------------------------------
 -*- HINTS -*-