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llvm-capstone/openmp/runtime/cmake/config-ix.cmake
Jonathan Peyton 1cdd87adfd Introduce dynamic affinity dispatch capabilities 
This set of changes enables the affinity interface (Either the preexisting
native operating system or HWLOC) to be dynamically set at runtime
initialization. The point of this change is that we were seeing performance
degradations when using HWLOC. This allows the user to use the old affinity
mechanisms which on large machines (>64 cores) makes a large difference in
initialization time.

These changes mostly move affinity code under a small class hierarchy:

KMPAffinity
  class Mask {}
KMPNativeAffinity : public KMPAffinity
  class Mask : public KMPAffinity::Mask
KMPHwlocAffinity
  class Mask : public KMPAffinity::Mask

Since all interface functions (for both affinity and the mask implementation)
are virtual, the implementation can be chosen at runtime initialization.

Differential Revision: https://reviews.llvm.org/D26356

llvm-svn: 286890
2016-11-14 21:08:35 +00:00

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#
#//===----------------------------------------------------------------------===//
#//
#// The LLVM Compiler Infrastructure
#//
#// This file is dual licensed under the MIT and the University of Illinois Open
#// Source Licenses. See LICENSE.txt for details.
#//
#//===----------------------------------------------------------------------===//
#
include(CheckCCompilerFlag)
include(CheckCSourceCompiles)
include(CheckCXXCompilerFlag)
include(CheckIncludeFile)
include(CheckLibraryExists)
include(CheckIncludeFiles)
include(LibompCheckLinkerFlag)
include(LibompCheckFortranFlag)
# Check for versioned symbols
function(libomp_check_version_symbols retval)
set(source_code
"#include <stdio.h>
void func1() { printf(\"Hello\"); }
void func2() { printf(\"World\"); }
__asm__(\".symver func1, func@VER1\");
__asm__(\".symver func2, func@VER2\");
int main() {
func1();
func2();
return 0;
}")
set(version_script_source "VER1 { }; VER2 { } VER1;")
file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/__version_script.txt "${version_script_source}")
set(CMAKE_REQUIRED_FLAGS -Wl,--version-script=${CMAKE_CURRENT_BINARY_DIR}/__version_script.txt)
check_c_source_compiles("${source_code}" ${retval})
set(${retval} ${${retval}} PARENT_SCOPE)
file(REMOVE ${CMAKE_CURRENT_BINARY_DIR}/__version_script.txt)
endfunction()
# Includes the architecture flag in both compile and link phase
function(libomp_check_architecture_flag flag retval)
set(CMAKE_REQUIRED_FLAGS "${flag}")
check_c_compiler_flag("${flag}" ${retval})
set(${retval} ${${retval}} PARENT_SCOPE)
endfunction()
# Checking C, CXX, Linker Flags
check_cxx_compiler_flag(-std=c++11 LIBOMP_HAVE_STD_CPP11_FLAG)
check_cxx_compiler_flag(-fno-exceptions LIBOMP_HAVE_FNO_EXCEPTIONS_FLAG)
check_cxx_compiler_flag(-fno-rtti LIBOMP_HAVE_FNO_RTTI_FLAG)
check_c_compiler_flag("-x c++" LIBOMP_HAVE_X_CPP_FLAG)
check_c_compiler_flag(-Werror LIBOMP_HAVE_WERROR_FLAG)
check_c_compiler_flag(-Wunused-function LIBOMP_HAVE_WNO_UNUSED_FUNCTION_FLAG)
check_c_compiler_flag(-Wunused-local-typedef LIBOMP_HAVE_WNO_UNUSED_LOCAL_TYPEDEF_FLAG)
check_c_compiler_flag(-Wunused-value LIBOMP_HAVE_WNO_UNUSED_VALUE_FLAG)
check_c_compiler_flag(-Wunused-variable LIBOMP_HAVE_WNO_UNUSED_VARIABLE_FLAG)
check_c_compiler_flag(-Wswitch LIBOMP_HAVE_WNO_SWITCH_FLAG)
check_c_compiler_flag(-Wcovered-switch-default LIBOMP_HAVE_WNO_COVERED_SWITCH_DEFAULT_FLAG)
check_c_compiler_flag(-Wdeprecated-register LIBOMP_HAVE_WNO_DEPRECATED_REGISTER_FLAG)
check_c_compiler_flag(-Wsign-compare LIBOMP_HAVE_WNO_SIGN_COMPARE_FLAG)
check_c_compiler_flag(-Wgnu-anonymous-struct LIBOMP_HAVE_WNO_GNU_ANONYMOUS_STRUCT_FLAG)
check_c_compiler_flag(-Wunknown-pragmas LIBOMP_HAVE_WNO_UNKNOWN_PRAGMAS_FLAG)
check_c_compiler_flag(-Wmissing-field-initializers LIBOMP_HAVE_WNO_MISSING_FIELD_INITIALIZERS_FLAG)
check_c_compiler_flag(-Wmissing-braces LIBOMP_HAVE_WNO_MISSING_BRACES_FLAG)
check_c_compiler_flag(-Wcomment LIBOMP_HAVE_WNO_COMMENT_FLAG)
check_c_compiler_flag(-Wself-assign LIBOMP_HAVE_WNO_SELF_ASSIGN_FLAG)
check_c_compiler_flag(-Wvla-extension LIBOMP_HAVE_WNO_VLA_EXTENSION_FLAG)
check_c_compiler_flag(-Wformat-pedantic LIBOMP_HAVE_WNO_FORMAT_PEDANTIC_FLAG)
check_c_compiler_flag(-msse2 LIBOMP_HAVE_MSSE2_FLAG)
check_c_compiler_flag(-ftls-model=initial-exec LIBOMP_HAVE_FTLS_MODEL_FLAG)
libomp_check_architecture_flag(-mmic LIBOMP_HAVE_MMIC_FLAG)
libomp_check_architecture_flag(-m32 LIBOMP_HAVE_M32_FLAG)
if(WIN32)
# Check Windows MSVC style flags.
check_c_compiler_flag(/TP LIBOMP_HAVE_TP_FLAG)
check_cxx_compiler_flag(/EHsc LIBOMP_HAVE_EHSC_FLAG)
check_cxx_compiler_flag(/GS LIBOMP_HAVE_GS_FLAG)
check_cxx_compiler_flag(/Oy- LIBOMP_HAVE_Oy__FLAG)
check_cxx_compiler_flag(/arch:SSE2 LIBOMP_HAVE_ARCH_SSE2_FLAG)
check_cxx_compiler_flag(/Qsafeseh LIBOMP_HAVE_QSAFESEH_FLAG)
# It is difficult to create a dummy masm assembly file
# and then check the MASM assembler to see if these flags exist and work,
# so we assume they do for Windows.
set(LIBOMP_HAVE_SAFESEH_MASM_FLAG TRUE)
set(LIBOMP_HAVE_COFF_MASM_FLAG TRUE)
# Change Windows flags /MDx to /MTx
foreach(libomp_lang IN ITEMS C CXX)
foreach(libomp_btype IN ITEMS DEBUG RELWITHDEBINFO RELEASE MINSIZEREL)
string(REPLACE "/MD" "/MT"
CMAKE_${libomp_lang}_FLAGS_${libomp_btype}
"${CMAKE_${libomp_lang}_FLAGS_${libomp_btype}}"
)
endforeach()
endforeach()
else()
# It is difficult to create a dummy assembly file that compiles into an
# exectuable for every architecture and then check the C compiler to
# see if -x assembler-with-cpp exists and works, so we assume it does for non-Windows.
set(LIBOMP_HAVE_X_ASSEMBLER_WITH_CPP_FLAG TRUE)
endif()
if(${LIBOMP_FORTRAN_MODULES})
libomp_check_fortran_flag(-m32 LIBOMP_HAVE_M32_FORTRAN_FLAG)
endif()
# Check linker flags
if(WIN32)
libomp_check_linker_flag(/SAFESEH LIBOMP_HAVE_SAFESEH_FLAG)
elseif(NOT APPLE)
libomp_check_linker_flag(-Wl,-x LIBOMP_HAVE_X_FLAG)
libomp_check_linker_flag(-Wl,--warn-shared-textrel LIBOMP_HAVE_WARN_SHARED_TEXTREL_FLAG)
libomp_check_linker_flag(-Wl,--as-needed LIBOMP_HAVE_AS_NEEDED_FLAG)
libomp_check_linker_flag("-Wl,--version-script=${LIBOMP_SRC_DIR}/exports_so.txt" LIBOMP_HAVE_VERSION_SCRIPT_FLAG)
libomp_check_linker_flag(-static-libgcc LIBOMP_HAVE_STATIC_LIBGCC_FLAG)
libomp_check_linker_flag(-Wl,-z,noexecstack LIBOMP_HAVE_Z_NOEXECSTACK_FLAG)
libomp_check_linker_flag(-Wl,-fini=__kmp_internal_end_fini LIBOMP_HAVE_FINI_FLAG)
endif()
# Check Intel(R) C Compiler specific flags
if(CMAKE_C_COMPILER_ID STREQUAL "Intel")
check_cxx_compiler_flag(/Qlong_double LIBOMP_HAVE_LONG_DOUBLE_FLAG)
check_cxx_compiler_flag(/Qdiag-disable:177 LIBOMP_HAVE_DIAG_DISABLE_177_FLAG)
check_cxx_compiler_flag(/Qinline-min-size=1 LIBOMP_HAVE_INLINE_MIN_SIZE_FLAG)
check_cxx_compiler_flag(-Qoption,cpp,--extended_float_types LIBOMP_HAVE_EXTENDED_FLOAT_TYPES_FLAG)
check_cxx_compiler_flag(-falign-stack=maintain-16-byte LIBOMP_HAVE_FALIGN_STACK_FLAG)
check_cxx_compiler_flag("-opt-streaming-stores never" LIBOMP_HAVE_OPT_STREAMING_STORES_FLAG)
libomp_check_linker_flag(-static-intel LIBOMP_HAVE_STATIC_INTEL_FLAG)
libomp_check_linker_flag(-no-intel-extensions LIBOMP_HAVE_NO_INTEL_EXTENSIONS_FLAG)
check_library_exists(irc_pic _intel_fast_memcpy "" LIBOMP_HAVE_IRC_PIC_LIBRARY)
endif()
# Checking Threading requirements
find_package(Threads REQUIRED)
if(WIN32)
if(NOT CMAKE_USE_WIN32_THREADS_INIT)
libomp_error_say("Need Win32 thread interface on Windows.")
endif()
else()
if(NOT CMAKE_USE_PTHREADS_INIT)
libomp_error_say("Need pthread interface on Unix-like systems.")
endif()
endif()
# Find perl executable
# Perl is used to create omp.h (and other headers) along with kmp_i18n_id.inc and kmp_i18n_default.inc
find_package(Perl REQUIRED)
# The perl scripts take the --os=/--arch= flags which expect a certain format for operating systems and arch's.
# Until the perl scripts are removed, the most portable way to handle this is to have all operating systems that
# are neither Windows nor Mac (Most Unix flavors) be considered lin to the perl scripts. This is rooted
# in that all the Perl scripts check the operating system and will fail if it isn't "valid". This
# temporary solution lets us avoid trying to enumerate all the possible OS values inside the Perl modules.
if(WIN32)
set(LIBOMP_PERL_SCRIPT_OS win)
elseif(APPLE)
set(LIBOMP_PERL_SCRIPT_OS mac)
else()
set(LIBOMP_PERL_SCRIPT_OS lin)
endif()
if(IA32)
set(LIBOMP_PERL_SCRIPT_ARCH 32)
elseif(MIC)
set(LIBOMP_PERL_SCRIPT_ARCH mic)
elseif(INTEL64)
set(LIBOMP_PERL_SCRIPT_ARCH 32e)
else()
set(LIBOMP_PERL_SCRIPT_ARCH ${LIBOMP_ARCH})
endif()
# Checking features
# Check if version symbol assembler directives are supported
libomp_check_version_symbols(LIBOMP_HAVE_VERSION_SYMBOLS)
# Check if quad precision types are available
if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
set(LIBOMP_HAVE_QUAD_PRECISION TRUE)
elseif(CMAKE_C_COMPILER_ID STREQUAL "Intel")
if(LIBOMP_HAVE_EXTENDED_FLOAT_TYPES_FLAG)
set(LIBOMP_HAVE_QUAD_PRECISION TRUE)
else()
set(LIBOMP_HAVE_QUAD_PRECISION TRUE)
endif()
else()
set(LIBOMP_HAVE_QUAD_PRECISION FALSE)
endif()
# Check if adaptive locks are available
if((${IA32} OR ${INTEL64}) AND NOT MSVC)
set(LIBOMP_HAVE_ADAPTIVE_LOCKS TRUE)
else()
set(LIBOMP_HAVE_ADAPTIVE_LOCKS FALSE)
endif()
# Check if stats-gathering is available
if(${LIBOMP_STATS})
check_c_source_compiles(
"__thread int x;
int main(int argc, char** argv)
{ x = argc; return x; }"
LIBOMP_HAVE___THREAD)
check_c_source_compiles(
"int main(int argc, char** argv)
{ unsigned long long t = __builtin_readcyclecounter(); return 0; }"
LIBOMP_HAVE___BUILTIN_READCYCLECOUNTER)
if(NOT LIBOMP_HAVE___BUILTIN_READCYCLECOUNTER)
if(${IA32} OR ${INTEL64} OR ${MIC})
check_include_file(x86intrin.h LIBOMP_HAVE_X86INTRIN_H)
libomp_append(CMAKE_REQUIRED_DEFINITIONS -DLIBOMP_HAVE_X86INTRIN_H LIBOMP_HAVE_X86INTRIN_H)
check_c_source_compiles(
"#ifdef LIBOMP_HAVE_X86INTRIN_H
# include <x86intrin.h>
#endif
int main(int argc, char** argv) { unsigned long long t = __rdtsc(); return 0; }" LIBOMP_HAVE___RDTSC)
set(CMAKE_REQUIRED_DEFINITIONS)
endif()
endif()
if(LIBOMP_HAVE___THREAD AND (LIBOMP_HAVE___RDTSC OR LIBOMP_HAVE___BUILTIN_READCYCLECOUNTER))
set(LIBOMP_HAVE_STATS TRUE)
else()
set(LIBOMP_HAVE_STATS FALSE)
endif()
endif()
# Check if OMPT support is available
# Currently, __builtin_frame_address() is required for OMPT
# Weak attribute is required for Unices, LIBPSAPI is used for Windows
check_c_source_compiles("int main(int argc, char** argv) {
void* p = __builtin_frame_address(0);
return 0;}" LIBOMP_HAVE___BUILTIN_FRAME_ADDRESS)
check_c_source_compiles("__attribute__ ((weak)) int foo(int a) { return a*a; }
int main(int argc, char** argv) {
return foo(argc);}" LIBOMP_HAVE_WEAK_ATTRIBUTE)
check_include_files("windows.h;psapi.h" LIBOMP_HAVE_PSAPI_H)
check_library_exists(psapi EnumProcessModules "" LIBOMP_HAVE_LIBPSAPI)
if(LIBOMP_HAVE_PSAPI_H AND LIBOMP_HAVE_LIBPSAPI)
set(LIBOMP_HAVE_PSAPI TRUE)
endif()
if(NOT LIBOMP_HAVE___BUILTIN_FRAME_ADDRESS)
set(LIBOMP_HAVE_OMPT_SUPPORT FALSE)
else()
if(LIBOMP_HAVE_WEAK_ATTRIBUTE OR LIBOMP_HAVE_PSAPI)
set(LIBOMP_HAVE_OMPT_SUPPORT TRUE)
else()
set(LIBOMP_HAVE_OMPT_SUPPORT FALSE)
endif()
endif()
# Check if HWLOC support is available
if(${LIBOMP_USE_HWLOC})
set(CMAKE_REQUIRED_INCLUDES ${LIBOMP_HWLOC_INSTALL_DIR}/include)
check_include_file(hwloc.h LIBOMP_HAVE_HWLOC_H)
set(CMAKE_REQUIRED_INCLUDES)
find_library(LIBOMP_HWLOC_LIBRARY
NAMES hwloc libhwloc
HINTS ${LIBOMP_HWLOC_INSTALL_DIR}/lib)
if(LIBOMP_HWLOC_LIBRARY)
check_library_exists(${LIBOMP_HWLOC_LIBRARY} hwloc_topology_init
${LIBOMP_HWLOC_INSTALL_DIR}/lib LIBOMP_HAVE_LIBHWLOC)
get_filename_component(LIBOMP_HWLOC_LIBRARY_DIR ${LIBOMP_HWLOC_LIBRARY} PATH)
endif()
if(LIBOMP_HAVE_HWLOC_H AND LIBOMP_HAVE_LIBHWLOC AND LIBOMP_HWLOC_LIBRARY)
set(LIBOMP_HAVE_HWLOC TRUE)
else()
set(LIBOMP_HAVE_HWLOC FALSE)
libomp_say("Could not find hwloc")
endif()
endif()
# Check if ThreadSanitizer support is available
if("${CMAKE_SYSTEM_NAME}" MATCHES "Linux" AND ${INTEL64})
set(LIBOMP_HAVE_TSAN_SUPPORT TRUE)
else()
set(LIBOMP_HAVE_TSAN_SUPPORT FALSE)
endif()
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