Change remaining references to lit.util.capture to use subprocess.check_output.

[dlj]

Summary

The capture() function was removed in r306625. This should fix PGO breakages
reported by Michael Zolotukhin.

test/Unit/lit.cfg

 # -*- Python -*-
 
 # Configuration file for the 'lit' test runner.
 
 import os
 
 import lit.formats
 
 # name: The name of this test suite.
 config.name = 'LLVM-Unit'
 
 # suffixes: A list of file extensions to treat as test files.
 config.suffixes = []
 
 # is_early; Request to run this suite early.
 config.is_early = True
 
 # test_source_root: The root path where tests are located.
 # test_exec_root: The root path where tests should be run.
 llvm_obj_root = getattr(config, 'llvm_obj_root', None)
 if llvm_obj_root is not None:
     config.test_exec_root = os.path.join(llvm_obj_root, 'unittests')
     config.test_source_root = config.test_exec_root
 
 # testFormat: The test format to use to interpret tests.
 llvm_build_mode = getattr(config, 'llvm_build_mode', "Debug")
 config.test_format = lit.formats.GoogleTest(llvm_build_mode, 'Tests')
 
 # Propagate the temp directory. Windows requires this because it uses \Windows\
 # if none of these are present.
 if 'TMP' in os.environ:
     config.environment['TMP'] = os.environ['TMP']
 if 'TEMP' in os.environ:
     config.environment['TEMP'] = os.environ['TEMP']
 
 # Propagate path to symbolizer for ASan/MSan.
 for symbolizer in ['ASAN_SYMBOLIZER_PATH', 'MSAN_SYMBOLIZER_PATH']:
     if symbolizer in os.environ:
         config.environment[symbolizer] = os.environ[symbolizer]
 
 # Win32 seeks DLLs along %PATH%.
 if sys.platform in ['win32', 'cygwin'] and os.path.isdir(config.shlibdir):
     config.environment['PATH'] = os.path.pathsep.join((
             config.shlibdir, config.environment['PATH']))
 
 # Win32 may use %SYSTEMDRIVE% during file system shell operations, so propogate.
 if sys.platform == 'win32' and 'SYSTEMDRIVE' in os.environ:
     config.environment['SYSTEMDRIVE'] = os.environ['SYSTEMDRIVE']
 
 ###
 
 # Check that the object root is known.
 if config.test_exec_root is None:
     # Otherwise, we haven't loaded the site specific configuration (the user is
     # probably trying to run on a test file directly, and either the site
     # configuration hasn't been created by the build system, or we are in an
     # out-of-tree build situation).
 
     # Check for 'llvm_unit_site_config' user parameter, and use that if available.
     site_cfg = lit_config.params.get('llvm_unit_site_config', None)
     if site_cfg and os.path.exists(site_cfg):
         lit_config.load_config(config, site_cfg)
         raise SystemExit
 
     # Try to detect the situation where we are using an out-of-tree build by
     # looking for 'llvm-config'.
     #
     # FIXME: I debated (i.e., wrote and threw away) adding logic to
     # automagically generate the lit.site.cfg if we are in some kind of fresh
     # build situation. This means knowing how to invoke the build system
     # though, and I decided it was too much magic.
 
     llvm_config = lit.util.which('llvm-config', config.environment['PATH'])
     if not llvm_config:
         lit_config.fatal('No site specific configuration available!')
 
     # Get the source and object roots.
     llvm_src_root = subprocess.check_output(['llvm-config', '--src-root']).strip()
     llvm_obj_root = subprocess.check_output(['llvm-config', '--obj-root']).strip()
 
     # Validate that we got a tree which points to here.
     this_src_root = os.path.join(os.path.dirname(__file__),'..','..')
     if os.path.realpath(llvm_src_root) != os.path.realpath(this_src_root):
         lit_config.fatal('No site specific configuration available!')
 
     # Check that the site specific configuration exists.
     site_cfg = os.path.join(llvm_obj_root, 'test', 'Unit', 'lit.site.cfg')
     if not os.path.exists(site_cfg):
         lit_config.fatal('No site specific configuration available!')
 
     # Okay, that worked. Notify the user of the automagic, and reconfigure.
     lit_config.note('using out-of-tree build at %r' % llvm_obj_root)
     lit_config.load_config(config, site_cfg)
     raise SystemExit
 

test/lit.cfg

 # -*- Python -*-
 
 # Configuration file for the 'lit' test runner.
 
 import os
 import sys
 import re
 import platform
 
 import lit.util
 import lit.formats
 
 # name: The name of this test suite.
 config.name = 'LLVM'
 
 # Tweak PATH for Win32 to decide to use bash.exe or not.
 if sys.platform in ['win32']:
     # Seek sane tools in directories and set to $PATH.
     path = getattr(config, 'lit_tools_dir', None)
     path = lit_config.getToolsPath(path,
                                    config.environment['PATH'],
                                    ['cmp.exe', 'grep.exe', 'sed.exe'])
     if path is not None:
         path = os.path.pathsep.join((path,
                                      config.environment['PATH']))
         config.environment['PATH'] = path
 
 # Choose between lit's internal shell pipeline runner and a real shell.  If
 # LIT_USE_INTERNAL_SHELL is in the environment, we use that as an override.
 use_lit_shell = os.environ.get("LIT_USE_INTERNAL_SHELL")
 if use_lit_shell:
     # 0 is external, "" is default, and everything else is internal.
     execute_external = (use_lit_shell == "0")
 else:
     # Otherwise we default to internal on Windows and external elsewhere, as
     # bash on Windows is usually very slow.
     execute_external = (not sys.platform in ['win32'])
 
 # testFormat: The test format to use to interpret tests.
 config.test_format = lit.formats.ShTest(execute_external)
 
 # suffixes: A list of file extensions to treat as test files. This is overriden
 # by individual lit.local.cfg files in the test subdirectories.
 config.suffixes = ['.ll', '.c', '.cxx', '.test', '.txt', '.s', '.mir']
 
 # excludes: A list of directories to exclude from the testsuite. The 'Inputs'
 # subdirectories contain auxiliary inputs for various tests in their parent
 # directories.
 config.excludes = ['Inputs', 'CMakeLists.txt', 'README.txt', 'LICENSE.txt']
 
 # test_source_root: The root path where tests are located.
 config.test_source_root = os.path.dirname(__file__)
 
 # test_exec_root: The root path where tests should be run.
 llvm_obj_root = getattr(config, 'llvm_obj_root', None)
 if llvm_obj_root is not None:
     config.test_exec_root = os.path.join(llvm_obj_root, 'test')
 
 # Tweak the PATH to include the tools dir.
 if llvm_obj_root is not None:
     llvm_tools_dir = getattr(config, 'llvm_tools_dir', None)
     if not llvm_tools_dir:
         lit_config.fatal('No LLVM tools dir set!')
     path = os.path.pathsep.join((llvm_tools_dir, config.environment['PATH']))
     config.environment['PATH'] = path
 
 # Propagate 'HOME' through the environment.
 if 'HOME' in os.environ:
     config.environment['HOME'] = os.environ['HOME']
 
 # Propagate 'INCLUDE' through the environment.
 if 'INCLUDE' in os.environ:
     config.environment['INCLUDE'] = os.environ['INCLUDE']
 
 # Propagate 'LIB' through the environment.
 if 'LIB' in os.environ:
     config.environment['LIB'] = os.environ['LIB']
 
 # Propagate the temp directory. Windows requires this because it uses \Windows\
 # if none of these are present.
 if 'TMP' in os.environ:
     config.environment['TMP'] = os.environ['TMP']
 if 'TEMP' in os.environ:
     config.environment['TEMP'] = os.environ['TEMP']
 
 # Propagate LLVM_SRC_ROOT into the environment.
 config.environment['LLVM_SRC_ROOT'] = getattr(config, 'llvm_src_root', '')
 
 # Propagate PYTHON_EXECUTABLE into the environment
 config.environment['PYTHON_EXECUTABLE'] = getattr(config, 'python_executable',
                                                   '')
 
 # Propagate path to symbolizer for ASan/MSan.
 for symbolizer in ['ASAN_SYMBOLIZER_PATH', 'MSAN_SYMBOLIZER_PATH']:
     if symbolizer in os.environ:
         config.environment[symbolizer] = os.environ[symbolizer]
 
 # Set up OCAMLPATH to include newly built OCaml libraries.
 llvm_lib_dir = getattr(config, 'llvm_lib_dir', None)
 if llvm_lib_dir is None:
     if llvm_obj_root is not None:
         llvm_lib_dir = os.path.join(llvm_obj_root, 'lib')
 
 if llvm_lib_dir is not None:
     top_ocaml_lib = os.path.join(llvm_lib_dir, 'ocaml')
     llvm_ocaml_lib = os.path.join(top_ocaml_lib, 'llvm')
     if llvm_ocaml_lib is not None:
         ocamlpath = os.path.pathsep.join((llvm_ocaml_lib, top_ocaml_lib))
         if 'OCAMLPATH' in os.environ:
             ocamlpath = os.path.pathsep.join((ocamlpath, os.environ['OCAMLPATH']))
         config.environment['OCAMLPATH'] = ocamlpath
 
         if 'CAML_LD_LIBRARY_PATH' in os.environ:
             caml_ld_library_path = os.path.pathsep.join((llvm_ocaml_lib,
                                         os.environ['CAML_LD_LIBRARY_PATH']))
             config.environment['CAML_LD_LIBRARY_PATH'] = caml_ld_library_path
         else:
             config.environment['CAML_LD_LIBRARY_PATH'] = llvm_ocaml_lib
 
 # Set up OCAMLRUNPARAM to enable backtraces in OCaml tests.
 config.environment['OCAMLRUNPARAM'] = 'b'
 
 ###
 
 import os
 
 # Check that the object root is known.
 if config.test_exec_root is None:
     # Otherwise, we haven't loaded the site specific configuration (the user is
     # probably trying to run on a test file directly, and either the site
     # configuration hasn't been created by the build system, or we are in an
     # out-of-tree build situation).
 
     # Check for 'llvm_site_config' user parameter, and use that if available.
     site_cfg = lit_config.params.get('llvm_site_config', None)
     if site_cfg and os.path.exists(site_cfg):
         lit_config.load_config(config, site_cfg)
         raise SystemExit
 
     # Try to detect the situation where we are using an out-of-tree build by
     # looking for 'llvm-config'.
     #
     # FIXME: I debated (i.e., wrote and threw away) adding logic to
     # automagically generate the lit.site.cfg if we are in some kind of fresh
     # build situation. This means knowing how to invoke the build system
     # though, and I decided it was too much magic.
 
     llvm_config = lit.util.which('llvm-config', config.environment['PATH'])
     if not llvm_config:
         lit_config.fatal('No site specific configuration available!')
 
     # Get the source and object roots.
     llvm_src_root = subprocess.check_output(['llvm-config', '--src-root']).strip()
     llvm_obj_root = subprocess.check_output(['llvm-config', '--obj-root']).strip()
 
     # Validate that we got a tree which points to here.
     this_src_root = os.path.dirname(config.test_source_root)
     if os.path.realpath(llvm_src_root) != os.path.realpath(this_src_root):
         lit_config.fatal('No site specific configuration available!')
 
     # Check that the site specific configuration exists.
     site_cfg = os.path.join(llvm_obj_root, 'test', 'lit.site.cfg')
     if not os.path.exists(site_cfg):
         lit_config.fatal('No site specific configuration available!')
 
     # Okay, that worked. Notify the user of the automagic, and reconfigure.
     lit_config.note('using out-of-tree build at %r' % llvm_obj_root)
     lit_config.load_config(config, site_cfg)
     raise SystemExit
 
 ###
 
 # Provide the path to asan runtime lib 'libclang_rt.asan_osx_dynamic.dylib' if
 # available. This is darwin specific since it's currently only needed on darwin.
 def get_asan_rtlib():
     if not "Address" in config.llvm_use_sanitizer or \
        not "Darwin" in config.host_os or \
        not "x86" in config.host_triple:
         return ""
     try:
         import glob
     except:
         print("glob module not found, skipping get_asan_rtlib() lookup")
         return ""
     # The libclang_rt.asan_osx_dynamic.dylib path is obtained using the relative
     # path from the host cc.
     host_lib_dir = os.path.join(os.path.dirname(config.host_cc), "../lib")
     asan_dylib_dir_pattern = host_lib_dir + \
         "/clang/*/lib/darwin/libclang_rt.asan_osx_dynamic.dylib"
     found_dylibs = glob.glob(asan_dylib_dir_pattern)
     if len(found_dylibs) != 1:
         return ""
     return found_dylibs[0]
 
 lli = 'lli'
 # The target triple used by default by lli is the process target triple (some
 # triple appropriate for generating code for the current process) but because
 # we don't support COFF in MCJIT well enough for the tests, force ELF format on
 # Windows.  FIXME: the process target triple should be used here, but this is
 # difficult to obtain on Windows.
 if re.search(r'cygwin|mingw32|windows-gnu|windows-msvc|win32', config.host_triple):
   lli += ' -mtriple='+config.host_triple+'-elf'
 config.substitutions.append( ('%lli', lli ) )
 
 # Similarly, have a macro to use llc with DWARF even when the host is win32.
 llc_dwarf = 'llc'
 if re.search(r'win32', config.target_triple):
   llc_dwarf += ' -mtriple='+config.target_triple.replace('-win32', '-mingw32')
 config.substitutions.append( ('%llc_dwarf', llc_dwarf) )
 
 # Add site-specific substitutions.
 config.substitutions.append( ('%gold', config.gold_executable) )
 config.substitutions.append( ('%go', config.go_executable) )
 config.substitutions.append( ('%llvmshlibdir', config.llvm_shlib_dir) )
 config.substitutions.append( ('%shlibext', config.llvm_shlib_ext) )
 config.substitutions.append( ('%exeext', config.llvm_exe_ext) )
 config.substitutions.append( ('%python', config.python_executable) )
 config.substitutions.append( ('%host_cc', config.host_cc) )
 
 # Provide the path to asan runtime lib if available. On darwin, this lib needs
 # to be loaded via DYLD_INSERT_LIBRARIES before libLTO.dylib in case the files
 # to be linked contain instrumented sanitizer code.
 ld64_cmd = config.ld64_executable
 asan_rtlib = get_asan_rtlib()
 if asan_rtlib:
   ld64_cmd = "DYLD_INSERT_LIBRARIES={} {}".format(asan_rtlib, ld64_cmd)
 config.substitutions.append( ('%ld64', ld64_cmd) )
 
 # OCaml substitutions.
 # Support tests for both native and bytecode builds.
 config.substitutions.append( ('%ocamlc',
     "%s ocamlc -cclib -L%s %s" %
         (config.ocamlfind_executable, llvm_lib_dir, config.ocaml_flags)) )
 if config.have_ocamlopt:
     config.substitutions.append( ('%ocamlopt',
         "%s ocamlopt -cclib -L%s -cclib -Wl,-rpath,%s %s" %
             (config.ocamlfind_executable, llvm_lib_dir, llvm_lib_dir, config.ocaml_flags)) )
 else:
     config.substitutions.append( ('%ocamlopt', "true" ) )
 
 # For each occurrence of an llvm tool name as its own word, replace it
 # with the full path to the build directory holding that tool.  This
 # ensures that we are testing the tools just built and not some random
 # tools that might happen to be in the user's PATH.  Thus this list
 # includes every tool placed in $(LLVM_OBJ_ROOT)/$(BuildMode)/bin
 # (llvm_tools_dir in lit parlance).
 
 # Avoid matching RUN line fragments that are actually part of
 # path names or options or whatever.
 # The regex is a pre-assertion to avoid matching a preceding
 # dot, hyphen, carat, or slash (.foo, -foo, etc.).  Some patterns
 # also have a post-assertion to not match a trailing hyphen (foo-).
 NOJUNK = r"(?<!\.|-|\^|/|<)"
 
 
 def find_tool_substitution(pattern):
     # Extract the tool name from the pattern.  This relies on the tool
     # name being surrounded by \b word match operators.  If the
     # pattern starts with "| ", include it in the string to be
     # substituted.
     tool_match = re.match(r"^(\\)?((\| )?)\W+b([0-9A-Za-z-_]+)\\b\W*$",
                           pattern)
     tool_pipe = tool_match.group(2)
     tool_name = tool_match.group(4)
     # Did the user specify the tool path + arguments? This allows things like
     # llvm-lit "-Dllc=llc -enable-misched -verify-machineinstrs"
     tool_path = lit_config.params.get(tool_name)
     if tool_path is None:
         tool_path = lit.util.which(tool_name, llvm_tools_dir)
         if tool_path is None:
             return tool_name, tool_path, tool_pipe
     if (tool_name == "llc" and
        'LLVM_ENABLE_MACHINE_VERIFIER' in os.environ and
        os.environ['LLVM_ENABLE_MACHINE_VERIFIER'] == "1"):
         tool_path += " -verify-machineinstrs"
     if (tool_name == "llvm-go"):
         tool_path += " go=" + config.go_executable
     return tool_name, tool_path, tool_pipe
 
 
 for pattern in [r"\bbugpoint\b(?!-)",
                 NOJUNK + r"\bllc\b",
                 r"\blli\b",
                 r"\bllvm-ar\b",
                 r"\bllvm-as\b",
                 r"\bllvm-bcanalyzer\b",
                 r"\bllvm-config\b",
                 r"\bllvm-cov\b",
                 r"\bllvm-cxxdump\b",
                 r"\bllvm-diff\b",
                 r"\bllvm-dis\b",
                 r"\bllvm-dsymutil\b",
                 r"\bllvm-dwarfdump\b",
                 r"\bllvm-extract\b",
                 r"\bllvm-lib\b",
                 r"\bllvm-link\b",
                 r"\bllvm-lto\b",
                 r"\bllvm-lto2\b",
                 r"\bllvm-mc\b",
                 r"\bllvm-mcmarkup\b",
                 r"\bllvm-modextract\b",
                 r"\bllvm-nm\b",
                 r"\bllvm-objdump\b",
                 r"\bllvm-pdbutil\b",
                 r"\bllvm-profdata\b",
                 r"\bllvm-ranlib\b",
                 r"\bllvm-readobj\b",
                 r"\bllvm-rtdyld\b",
                 r"\bllvm-size\b",
                 r"\bllvm-split\b",
                 r"\bllvm-strings\b",
                 r"\bllvm-tblgen\b",
                 r"\bllvm-c-test\b",
                 r"\bllvm-cxxfilt\b",
                 r"\bllvm-xray\b",
                 NOJUNK + r"\bllvm-symbolizer\b",
                 NOJUNK + r"\bopt\b",
                 r"\bFileCheck\b",
                 r"\bobj2yaml\b",
                 NOJUNK + r"\bsancov\b",
                 NOJUNK + r"\bsanstats\b",
                 r"\byaml2obj\b",
                 r"\byaml-bench\b",
                 r"\bverify-uselistorder\b",
                 # Handle these specially as they are strings searched
                 # for during testing.
                 r"\| \bcount\b",
                 r"\| \bnot\b"]:
     tool_name, tool_path, tool_pipe = find_tool_substitution(pattern)
     if not tool_path:
         # Warn, but still provide a substitution.
         lit_config.note('Did not find ' + tool_name + ' in ' + llvm_tools_dir)
         tool_path = llvm_tools_dir + '/' + tool_name
     config.substitutions.append((pattern, tool_pipe + tool_path))
 
 # For tools that are optional depending on the config, we won't warn
 # if they're missing.
 for pattern in [r"\bllvm-go\b",
                 r"\bKaleidoscope-Ch3\b",
                 r"\bKaleidoscope-Ch4\b",
                 r"\bKaleidoscope-Ch5\b",
                 r"\bKaleidoscope-Ch6\b",
                 r"\bKaleidoscope-Ch7\b",
                 r"\bKaleidoscope-Ch8\b"]:
     tool_name, tool_path, tool_pipe = find_tool_substitution(pattern)
     if not tool_path:
         # Provide a substitution anyway, for the sake of consistent errors.
         tool_path = llvm_tools_dir + '/' + tool_name
     config.substitutions.append((pattern, tool_pipe + tool_path))
 
 
 ### Targets
 
 config.targets = frozenset(config.targets_to_build.split())
 
 for arch in config.targets_to_build.split():
     config.available_features.add(arch.lower() + '-registered-target')
 
 ### Features
 
 # Shell execution
 if execute_external:
     config.available_features.add('shell')
 
 # Others/can-execute.txt
 if sys.platform not in ['win32']:
     config.available_features.add('can-execute')
     config.available_features.add('not_COFF')
 
 # Loadable module
 # FIXME: This should be supplied by Makefile or autoconf.
 if sys.platform in ['win32', 'cygwin']:
     loadable_module = (config.enable_shared == 1)
 else:
     loadable_module = True
 
 if loadable_module:
     config.available_features.add('loadable_module')
 
 # Static libraries are not built if BUILD_SHARED_LIBS is ON.
 if not config.build_shared_libs:
     config.available_features.add("static-libs")
 
 # Sanitizers.
 if 'Address' in config.llvm_use_sanitizer:
     config.available_features.add("asan")
 else:
     config.available_features.add("not_asan")
 if 'Memory' in config.llvm_use_sanitizer:
     config.available_features.add("msan")
 else:
     config.available_features.add("not_msan")
 if 'Undefined' in config.llvm_use_sanitizer:
     config.available_features.add("ubsan")
 else:
     config.available_features.add("not_ubsan")
 
 # Check if we should run long running tests.
 if lit_config.params.get("run_long_tests", None) == "true":
     config.available_features.add("long_tests")
 
 # Direct object generation
 if not 'hexagon' in config.target_triple:
     config.available_features.add("object-emission")
 
 if config.have_zlib:
     config.available_features.add("zlib")
 else:
     config.available_features.add("nozlib")
 
 # LLVM can be configured with an empty default triple
 # Some tests are "generic" and require a valid default triple
 if config.target_triple:
     config.available_features.add("default_triple")
     if re.match(r'^x86_64.*-linux', config.target_triple):
       config.available_features.add("x86_64-linux")
 
 # Native compilation: host arch == default triple arch
 # FIXME: Consider cases that target can be executed
 # even if host_triple were different from target_triple.
 if config.host_triple == config.target_triple:
     config.available_features.add("native")
 
 import subprocess
 
 def have_ld_plugin_support():
     if not os.path.exists(os.path.join(config.llvm_shlib_dir, 'LLVMgold.so')):
         return False
 
     ld_cmd = subprocess.Popen([config.gold_executable, '--help'], stdout = subprocess.PIPE, env={'LANG': 'C'})
     ld_out = ld_cmd.stdout.read().decode()
     ld_cmd.wait()
 
     if not '-plugin' in ld_out:
         return False
 
     # check that the used emulations are supported.
     emu_line = [l for l in ld_out.split('\n') if 'supported emulations' in l]
     if len(emu_line) != 1:
         return False
     emu_line = emu_line[0]
     fields = emu_line.split(':')
     if len(fields) != 3:
         return False
     emulations = fields[2].split()
     if 'elf_x86_64' not in emulations:
         return False
     if 'elf32ppc' in emulations:
         config.available_features.add('ld_emu_elf32ppc')
 
     ld_version = subprocess.Popen([config.gold_executable, '--version'], stdout = subprocess.PIPE, env={'LANG': 'C'})
     if not 'GNU gold' in ld_version.stdout.read().decode():
         return False
     ld_version.wait()
 
     return True
 
 if have_ld_plugin_support():
     config.available_features.add('ld_plugin')
 
 def have_ld64_plugin_support():
     if not config.llvm_tool_lto_build or config.ld64_executable == '':
         return False
 
     ld_cmd = subprocess.Popen([config.ld64_executable, '-v'], stderr = subprocess.PIPE)
     ld_out = ld_cmd.stderr.read().decode()
     ld_cmd.wait()
 
     if 'ld64' not in ld_out or 'LTO' not in ld_out:
         return False
 
     return True
 
 if have_ld64_plugin_support():
     config.available_features.add('ld64_plugin')
 
 # Ask llvm-config about assertion mode.
 try:
     llvm_config_cmd = subprocess.Popen(
         [os.path.join(llvm_tools_dir, 'llvm-config'), '--assertion-mode'],
         stdout = subprocess.PIPE,
         env=config.environment)
 except OSError:
     print("Could not find llvm-config in " + llvm_tools_dir)
     exit(42)
 
 if re.search(r'ON', llvm_config_cmd.stdout.read().decode('ascii')):
     config.available_features.add('asserts')
 llvm_config_cmd.wait()
 
 if 'darwin' == sys.platform:
     try:
         sysctl_cmd = subprocess.Popen(['sysctl', 'hw.optional.fma'],
                                     stdout = subprocess.PIPE)
     except OSError:
         print("Could not exec sysctl")
     result = sysctl_cmd.stdout.read().decode('ascii')
     if -1 != result.find("hw.optional.fma: 1"):
         config.available_features.add('fma3')
     sysctl_cmd.wait()
 
 if platform.system() in ['Windows']:
     if re.match(r'.*-win32$', config.target_triple):
         config.available_features.add('target-windows')
     # For tests that require Windows to run.
     config.available_features.add('system-windows')
 
 # .debug_frame is not emitted for targeting Windows x64.
 if not re.match(r'^x86_64.*-(mingw32|windows-gnu|win32)', config.target_triple):
     config.available_features.add('debug_frame')
 
 # Check if we should use gmalloc.
 use_gmalloc_str = lit_config.params.get('use_gmalloc', None)
 if use_gmalloc_str is not None:
     if use_gmalloc_str.lower() in ('1', 'true'):
         use_gmalloc = True
     elif use_gmalloc_str.lower() in ('', '0', 'false'):
         use_gmalloc = False
     else:
         lit_config.fatal('user parameter use_gmalloc should be 0 or 1')
 else:
     # Default to not using gmalloc
     use_gmalloc = False
 
 # Allow use of an explicit path for gmalloc library.
 # Will default to '/usr/lib/libgmalloc.dylib' if not set.
 gmalloc_path_str = lit_config.params.get('gmalloc_path',
                                          '/usr/lib/libgmalloc.dylib')
 
 if use_gmalloc:
      config.environment.update({'DYLD_INSERT_LIBRARIES' : gmalloc_path_str})
 
 # Ask llvm-config about global-isel.
 try:
     llvm_config_cmd = subprocess.Popen(
         [os.path.join(llvm_tools_dir, 'llvm-config'), '--has-global-isel'],
         stdout = subprocess.PIPE,
         env=config.environment)
 except OSError:
     print("Could not find llvm-config in " + llvm_tools_dir)
     exit(42)
 
 if re.search(r'ON', llvm_config_cmd.stdout.read().decode('ascii')):
     config.available_features.add('global-isel')
 llvm_config_cmd.wait()
 
 if config.have_libxar:
     config.available_features.add('xar')
 
 if config.enable_abi_breaking_checks == "1":
     config.available_features.add('abi-breaking-checks')