Initial OpenMP support

src/settings_internal.js

@@ -35,8 +35,8 @@ var SIDE_MODULE_IMPORTS = [];
 // programs contains EM_JS or EM_ASM data section, in which case these symbols
 // won't exist.
 var EXPORT_IF_DEFINED = ['__start_em_asm', '__stop_em_asm',
-                         '__start_em_lib_deps', '__stop_em_lib_deps',
-                         '__start_em_js', '__stop_em_js'];
+    '__start_em_lib_deps', '__stop_em_lib_deps',
+    '__start_em_js', '__stop_em_js'];
 
 // Like EXPORTED_FUNCTIONS, but symbol is required to exist in native code.
 // This means wasm-ld will fail if these symbols are missing.
@@ -244,6 +244,9 @@ var PRE_JS_FILES = [];
 
 var POST_JS_FILES = [];
 
+// Set when -fopenmp is passed, implies PTHREADS
+var OPENMP = false;
+
 // Set when -pthread / -sPTHREADS is passed
 var PTHREADS = false;
 

system/lib/libomp/.gitignore

@@ -0,0 +1,44 @@
+#==============================================================================#
+# This file specifies intentionally untracked files that git should ignore.
+# See: http://www.kernel.org/pub/software/scm/git/docs/gitignore.html
+#
+# This file is intentionally different from the output of `git svn show-ignore`,
+# as most of those are useless.
+#==============================================================================#
+
+#==============================================================================#
+# File extensions to be ignored anywhere in the tree.
+#==============================================================================#
+# Temp files created by most text editors.
+*~
+# Merge files created by git.
+*.orig
+# Byte compiled python modules.
+*.pyc
+# vim swap files
+.*.sw?
+.sw?
+#OS X specific files.
+.DS_store
+# Python egg files
+*.eggs
+
+#==============================================================================#
+# Explicit files to ignore (only matches one).
+#==============================================================================#
+# Various tag programs
+tags
+/TAGS
+/GPATH
+/GRTAGS
+/GSYMS
+/GTAGS
+.gitusers
+
+#==============================================================================#
+# Directories to ignore (do not add trailing '/'s, they skip symlinks).
+#==============================================================================#
+runtime/exports
+
+# Nested build directory
+/build

system/lib/libomp/CMakeLists.txt

@@ -0,0 +1,174 @@
+cmake_minimum_required(VERSION 3.20.0)
+set(LLVM_SUBPROJECT_TITLE "OpenMP")
+
+set(LLVM_COMMON_CMAKE_UTILS ${CMAKE_CURRENT_SOURCE_DIR}/../cmake)
+
+# Add path for custom modules
+list(INSERT CMAKE_MODULE_PATH 0
+  "${CMAKE_CURRENT_SOURCE_DIR}/cmake"
+  "${LLVM_COMMON_CMAKE_UTILS}/Modules"
+  )
+
+# llvm/runtimes/ will set OPENMP_STANDALONE_BUILD.
+if (OPENMP_STANDALONE_BUILD OR "${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_CURRENT_SOURCE_DIR}")
+  set(OPENMP_STANDALONE_BUILD TRUE)
+  project(openmp C CXX ASM)
+else()
+  set(OPENMP_STANDALONE_BUILD FALSE)
+endif()
+
+# Must go below project(..)
+include(GNUInstallDirs)
+
+if (OPENMP_STANDALONE_BUILD)
+  set(LLVM_TREE_AVAILABLE False)
+
+  # CMAKE_BUILD_TYPE was not set, default to Release.
+  if (NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE Release)
+  endif()
+
+  # Group common settings.
+  set(OPENMP_ENABLE_WERROR FALSE CACHE BOOL
+    "Enable -Werror flags to turn warnings into errors for supporting compilers.")
+  set(OPENMP_LIBDIR_SUFFIX "" CACHE STRING
+    "Suffix of lib installation directory, e.g. 64 => lib64")
+  # Do not use OPENMP_LIBDIR_SUFFIX directly, use OPENMP_INSTALL_LIBDIR.
+  set(OPENMP_INSTALL_LIBDIR "lib${OPENMP_LIBDIR_SUFFIX}" CACHE STRING
+      "Path where built OpenMP libraries should be installed.")
+
+  # Group test settings.
+  set(OPENMP_TEST_C_COMPILER ${CMAKE_C_COMPILER} CACHE STRING
+    "C compiler to use for testing OpenMP runtime libraries.")
+  set(OPENMP_TEST_CXX_COMPILER ${CMAKE_CXX_COMPILER} CACHE STRING
+    "C++ compiler to use for testing OpenMP runtime libraries.")
+  set(OPENMP_TEST_Fortran_COMPILER ${CMAKE_Fortran_COMPILER} CACHE STRING
+    "FORTRAN compiler to use for testing OpenMP runtime libraries.")
+  set(OPENMP_LLVM_TOOLS_DIR "" CACHE PATH "Path to LLVM tools for testing.")
+
+  set(CMAKE_CXX_STANDARD 17 CACHE STRING "C++ standard to conform to")
+  set(CMAKE_CXX_STANDARD_REQUIRED NO)
+  set(CMAKE_CXX_EXTENSIONS NO)
+else()
+  # Usually <llvm-project>/runtimes/CMakeLists.txt sets LLVM_TREE_AVAILABLE and
+  # we assume it is not available otherwise. The exception is that we are in an
+  # LLVM_ENABLE_PROJECTS=openmp build, the LLVM tree is actually available.
+  # Note that this build mode has been deprecated.
+  # See https://github.com/llvm/llvm-project/issues/124014
+  if (NOT LLVM_RUNTIMES_BUILD AND "openmp" IN_LIST LLVM_ENABLE_PROJECTS)
+    set(LLVM_TREE_AVAILABLE True)
+  endif ()
+
+  set(OPENMP_ENABLE_WERROR ${LLVM_ENABLE_WERROR})
+
+  # When building in tree we install the runtime according to the LLVM settings.
+  if(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR AND NOT APPLE)
+    set(OPENMP_INSTALL_LIBDIR lib${LLVM_LIBDIR_SUFFIX}/${LLVM_DEFAULT_TARGET_TRIPLE} CACHE STRING
+        "Path where built openmp libraries should be installed.")
+  else()
+    set(OPENMP_INSTALL_LIBDIR "lib${LLVM_LIBDIR_SUFFIX}" CACHE STRING
+        "Path where built OpenMP libraries should be installed.")
+  endif()
+
+  if (NOT MSVC)
+    set(OPENMP_TEST_C_COMPILER ${LLVM_TOOLS_BINARY_DIR}/clang)
+    set(OPENMP_TEST_CXX_COMPILER ${LLVM_TOOLS_BINARY_DIR}/clang++)
+  else()
+    set(OPENMP_TEST_C_COMPILER ${LLVM_TOOLS_BINARY_DIR}/clang.exe)
+    set(OPENMP_TEST_CXX_COMPILER ${LLVM_TOOLS_BINARY_DIR}/clang++.exe)
+  endif()
+
+  # Set fortran test compiler if flang is found
+  if (EXISTS "${OPENMP_TEST_Fortran_COMPILER}")
+    message("Using local flang build at ${OPENMP_TEST_Fortran_COMPILER}")
+  else()
+    unset(OPENMP_TEST_Fortran_COMPILER)
+  endif()
+
+  # If not standalone, set CMAKE_CXX_STANDARD but don't set the global cache value,
+  # only set it locally for OpenMP.
+  set(CMAKE_CXX_STANDARD 17)
+  set(CMAKE_CXX_STANDARD_REQUIRED NO)
+  set(CMAKE_CXX_EXTENSIONS NO)
+endif()
+
+# Check and set up common compiler flags.
+include(config-ix)
+include(HandleOpenMPOptions)
+
+# Check for flang
+set(OPENMP_TEST_Fortran_COMPILER_default "")
+if (CMAKE_Fortran_COMPILER)
+  set(OPENMP_TEST_Fortran_COMPILER_default "${CMAKE_Fortran_COMPILER}")
+endif ()
+set(OPENMP_TEST_Fortran_COMPILER "${OPENMP_TEST_Fortran_COMPILER_default}" CACHE STRING
+  "Fortran compiler to use for testing OpenMP runtime libraries.")
+
+# Set up testing infrastructure.
+include(OpenMPTesting)
+
+set(OPENMP_TEST_FLAGS "" CACHE STRING
+  "Extra compiler flags to send to the test compiler.")
+set(OPENMP_TEST_OPENMP_FLAGS ${OPENMP_TEST_COMPILER_OPENMP_FLAGS} CACHE STRING
+  "OpenMP compiler flag to use for testing OpenMP runtime libraries.")
+
+set(ENABLE_LIBOMPTARGET ON)
+# Currently libomptarget cannot be compiled on Windows or MacOS X.
+# Since the device plugins are only supported on Linux anyway,
+# there is no point in trying to compile libomptarget on other OSes.
+# 32-bit systems are not supported either.
+if (APPLE OR WIN32 OR WASM OR NOT "cxx_std_17" IN_LIST CMAKE_CXX_COMPILE_FEATURES
+    OR NOT CMAKE_SIZEOF_VOID_P EQUAL 8 OR "${CMAKE_SYSTEM_NAME}" MATCHES "AIX")
+  set(ENABLE_LIBOMPTARGET OFF)
+endif()
+
+option(OPENMP_ENABLE_LIBOMPTARGET "Enable building libomptarget for offloading."
+       ${ENABLE_LIBOMPTARGET})
+option(OPENMP_ENABLE_LIBOMP_PROFILING "Enable time profiling for libomp." OFF)
+
+# Header install location
+if(NOT LLVM_TREE_AVAILABLE)
+  set(LIBOMP_HEADERS_INSTALL_PATH "${CMAKE_INSTALL_INCLUDEDIR}")
+else()
+  include(GetClangResourceDir)
+  get_clang_resource_dir(LIBOMP_HEADERS_INSTALL_PATH SUBDIR include)
+endif()
+
+# Use the current compiler target to determine the appropriate runtime to build.
+if("${LLVM_DEFAULT_TARGET_TRIPLE}" MATCHES "^amdgcn|^nvptx" OR
+   "${CMAKE_CXX_COMPILER_TARGET}" MATCHES "^amdgcn|^nvptx")
+  add_subdirectory(device)
+else()
+  # Build host runtime library, after LIBOMPTARGET variables are set since they
+  # are needed to enable time profiling support in the OpenMP runtime.
+  add_subdirectory(runtime)
+
+  set(ENABLE_OMPT_TOOLS ON)
+  # Currently tools are not tested well on Windows or MacOS X.
+  if (APPLE OR WIN32)
+    set(ENABLE_OMPT_TOOLS OFF)
+  endif()
+
+  option(OPENMP_ENABLE_OMPT_TOOLS "Enable building ompt based tools for OpenMP."
+         ${ENABLE_OMPT_TOOLS})
+  if (OPENMP_ENABLE_OMPT_TOOLS)
+    add_subdirectory(tools)
+  endif()
+
+  # Propagate OMPT support to offload
+  if(NOT ${OPENMP_STANDALONE_BUILD})
+    set(LIBOMP_HAVE_OMPT_SUPPORT ${LIBOMP_HAVE_OMPT_SUPPORT} PARENT_SCOPE)
+    set(LIBOMP_OMP_TOOLS_INCLUDE_DIR ${LIBOMP_OMP_TOOLS_INCLUDE_DIR} PARENT_SCOPE)
+  endif()
+
+  option(OPENMP_MSVC_NAME_SCHEME "Build dll with MSVC naming scheme." OFF)
+
+  # Build libompd.so
+  add_subdirectory(libompd)
+
+  # Build documentation
+  add_subdirectory(docs)
+
+  # Now that we have seen all testsuites, create the check-openmp target.
+  construct_check_openmp_target()
+endif()

system/lib/libomp/CREDITS.txt

@@ -0,0 +1,65 @@
+This file is a partial list of people who have contributed to the LLVM/openmp
+project.  If you have contributed a patch or made some other contribution to
+LLVM/openmp, please submit a patch to this file to add yourself, and it will be
+done!
+
+The list is sorted by surname and formatted to allow easy grepping and
+beautification by scripts.  The fields are: name (N), email (E), web-address
+(W), PGP key ID and fingerprint (P), description (D), and snail-mail address
+(S).
+
+N: Adam Azarchs
+W: 10xgenomics.com
+D: Bug fix for lock code
+
+N: Carlo Bertolli
+W: http://ibm.com
+D: IBM contributor to PowerPC support in CMake files and elsewhere.
+
+N: Diego Caballero
+E: [email protected]
+D: Fork performance improvements
+
+N: Sunita Chandrasekaran
+D: Contributor to testsuite from OpenUH
+
+N: Barbara Chapman
+D: Contributor to testsuite from OpenUH
+
+N: University of Houston
+W: http://web.cs.uh.edu/~openuh/download/
+D: OpenUH test suite
+
+N: Intel Corporation OpenMP runtime team
+W: http://openmprtl.org
+D: Created the runtime.
+
+N: John Mellor-Crummey and other members of the OpenMP Tools Working Group
+E: [email protected]
+D: OpenMP Tools Interface (OMPT)
+
+N: Matthias Muller
+D: Contributor to testsuite from OpenUH
+
+N: Tal Nevo
+E: [email protected]
+D: ScaleMP contributor to improve runtime performance there.
+W: http://scalemp.com
+
+N: Pavel Neytchev
+D: Contributor to testsuite from OpenUH
+
+N: Steven Noonan
+E: [email protected]
+D: Patches for the ARM architecture and removal of several inconsistencies.
+
+N: Joachim Protze
+E: [email protected]
+D: OpenMP Tools Interface, Archer tool
+
+N: Alp Toker
+E: [email protected]
+D: Making build work for FreeBSD.
+
+N: Cheng Wang
+D: Contributor to testsuite from OpenUH