diff --color -Naur llvm-project/clang/utils/creduce-clang-crash.py llvm-project/clang/utils/creduce-clang-crash.py
--- llvm-project/clang/utils/creduce-clang-crash.py	2024-06-20 13:38:53.943180833 -0500
+++ llvm-project/clang/utils/creduce-clang-crash.py	2024-06-20 13:42:30.244711005 -0500
@@ -14,7 +14,6 @@
 import stat
 import sys
 import subprocess
-import pipes
 import shlex
 import tempfile
 import shutil
@@ -57,7 +56,7 @@
   sys.exit("ERROR: `%s` not found in %s" % (cmd_name, cmd_dir))
 
 def quote_cmd(cmd):
-  return ' '.join(pipes.quote(arg) for arg in cmd)
+  return ' '.join(shlex.quote(arg) for arg in cmd)
 
 def write_to_script(text, filename):
   with open(filename, 'w') as f:
@@ -199,7 +198,7 @@
 """ % (disable_symbolization, quote_cmd(self.get_crash_cmd()))
 
     for msg in self.expected_output:
-      output += 'grep -F %s t.log || exit 1\n' % pipes.quote(msg)
+      output += 'grep -F %s t.log || exit 1\n' % shlex.quote(msg)
 
     write_to_script(output, self.testfile)
     self.check_interestingness()
diff --color -Naur llvm-project/compiler-rt/test/asan/lit.cfg.py llvm-project/compiler-rt/test/asan/lit.cfg.py
--- llvm-project/compiler-rt/test/asan/lit.cfg.py	2024-06-20 13:38:17.808753484 -0500
+++ llvm-project/compiler-rt/test/asan/lit.cfg.py	2024-06-20 13:43:18.446949016 -0500
@@ -6,14 +6,8 @@
 
 import lit.formats
 
-# Get shlex.quote if available (added in 3.3), and fall back to pipes.quote if
-# it's not available.
-try:
-  import shlex
-  sh_quote = shlex.quote
-except:
-  import pipes
-  sh_quote = pipes.quote
+import shlex
+sh_quote = shlex.quote
 
 def get_required_attr(config, attr_name):
   attr_value = getattr(config, attr_name, None)
diff --color -Naur llvm-project/compiler-rt/test/lit.common.cfg.py llvm-project/compiler-rt/test/lit.common.cfg.py
--- llvm-project/compiler-rt/test/lit.common.cfg.py	2024-06-20 13:38:17.788752141 -0500
+++ llvm-project/compiler-rt/test/lit.common.cfg.py	2024-06-20 13:43:44.961730162 -0500
@@ -12,14 +12,8 @@
 import lit.formats
 import lit.util
 
-# Get shlex.quote if available (added in 3.3), and fall back to pipes.quote if
-# it's not available.
-try:
-  import shlex
-  sh_quote = shlex.quote
-except:
-  import pipes
-  sh_quote = pipes.quote
+import shlex
+sh_quote = shlex.quote
 
 def find_compiler_libdir():
   """
diff --color -Naur llvm-project/compiler-rt/test/memprof/lit.cfg.py llvm-project/compiler-rt/test/memprof/lit.cfg.py
--- llvm-project/compiler-rt/test/memprof/lit.cfg.py	2024-06-20 13:38:17.852756440 -0500
+++ llvm-project/compiler-rt/test/memprof/lit.cfg.py	2024-06-20 13:44:09.179356996 -0500
@@ -6,14 +6,8 @@
 
 import lit.formats
 
-# Get shlex.quote if available (added in 3.3), and fall back to pipes.quote if
-# it's not available.
-try:
-  import shlex
-  sh_quote = shlex.quote
-except:
-  import pipes
-  sh_quote = pipes.quote
+import shlex
+sh_quote = shlex.quote
 
 def get_required_attr(config, attr_name):
   attr_value = getattr(config, attr_name, None)
diff --color -Naur llvm-project/compiler-rt/test/sanitizer_common/ios_commands/iossim_run.py llvm-project/compiler-rt/test/sanitizer_common/ios_commands/iossim_run.py
--- llvm-project/compiler-rt/test/sanitizer_common/ios_commands/iossim_run.py	2024-06-20 13:38:17.946762755 -0500
+++ llvm-project/compiler-rt/test/sanitizer_common/ios_commands/iossim_run.py	2024-06-20 13:48:37.348371396 -0500
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 
-import glob, os, pipes, sys, subprocess
+import glob, os, shlex, sys, subprocess
 
 
 device_id = os.environ.get('SANITIZER_IOSSIM_TEST_DEVICE_IDENTIFIER')
@@ -39,7 +39,7 @@
       rm_args.append(arg)
     else:
       # FIXME(dliew): pipes.quote() is deprecated
-      rm_args.append(pipes.quote(arg))
+      rm_args.append(shlex.quote(arg))
   rm_cmd_line = ["/bin/rm"] + rm_args
   rm_cmd_line_str = ' '.join(rm_cmd_line)
   # We use `shell=True` so that any wildcard globs get expanded by the shell.
diff --color -Naur llvm-project/libcxx/utils/libcxx/test/config.py llvm-project/libcxx/utils/libcxx/test/config.py
--- llvm-project/libcxx/utils/libcxx/test/config.py	2024-06-20 13:38:59.394547032 -0500
+++ llvm-project/libcxx/utils/libcxx/test/config.py	2024-06-20 13:45:49.931125052 -0500
@@ -9,7 +9,6 @@
 import copy
 import os
 import pkgutil
-import pipes
 import platform
 import re
 import shlex
@@ -434,7 +433,7 @@
     def quote(self, s):
         if platform.system() == 'Windows':
             return lit.TestRunner.quote_windows_command([s])
-        return pipes.quote(s)
+        return shlex.quote(s)
 
     def configure_substitutions(self):
         sub = self.config.substitutions
diff --color -Naur llvm-project/libcxx/utils/libcxx/test/dsl.py llvm-project/libcxx/utils/libcxx/test/dsl.py
--- llvm-project/libcxx/utils/libcxx/test/dsl.py	2024-06-20 13:38:59.394547032 -0500
+++ llvm-project/libcxx/utils/libcxx/test/dsl.py	2024-06-20 13:45:11.318531231 -0500
@@ -8,7 +8,7 @@
 
 import os
 import pickle
-import pipes
+import shlex
 import platform
 import re
 import shutil
@@ -261,7 +261,7 @@
       }
     #endif
   """
-  return programSucceeds(config, program, args=[pipes.quote(l) for l in locales])
+  return programSucceeds(config, program, args=[shlex.quote(l) for l in locales])
 
 @_memoizeExpensiveOperation(lambda c, flags='': (c.substitutions, c.environment, flags))
 def compilerMacros(config, flags=''):
diff --color -Naur llvm-project/libcxx/utils/libcxx/test/format.py llvm-project/libcxx/utils/libcxx/test/format.py
--- llvm-project/libcxx/utils/libcxx/test/format.py	2024-06-20 13:38:59.394547032 -0500
+++ llvm-project/libcxx/utils/libcxx/test/format.py	2024-06-20 13:45:31.689899688 -0500
@@ -9,7 +9,7 @@
 import lit
 import lit.formats
 import os
-import pipes
+import shlex
 import re
 import shutil
 
diff --color -Naur ninja/configure.py ninja/configure.py
--- ninja/configure.py	2024-06-20 13:38:14.957561954 -0500
+++ ninja/configure.py	2024-06-20 13:46:12.859665292 -0500
@@ -23,7 +23,7 @@
 
 from optparse import OptionParser
 import os
-import pipes
+import shlex
 import string
 import subprocess
 import sys
@@ -264,7 +264,7 @@
 env_keys = set(['CXX', 'AR', 'CFLAGS', 'CXXFLAGS', 'LDFLAGS'])
 configure_env = dict((k, os.environ[k]) for k in os.environ if k in env_keys)
 if configure_env:
-    config_str = ' '.join([k + '=' + pipes.quote(configure_env[k])
+    config_str = ' '.join([k + '=' + shlex.quote(configure_env[k])
                            for k in configure_env])
     n.variable('configure_env', config_str + '$ ')
 n.newline()
diff --color -Naur swift/utils/build_swift/build_swift/shell.py swift/utils/build_swift/build_swift/shell.py
--- swift/utils/build_swift/build_swift/shell.py	2024-06-20 13:39:16.267680494 -0500
+++ swift/utils/build_swift/build_swift/shell.py	2024-06-20 13:47:56.850650939 -0500
@@ -23,7 +23,7 @@
 import sys
 from copy import copy as _copy
 from pathlib import Path
-from pipes import quote as _quote
+from shlex import quote as _quote
 from shlex import split
 from subprocess import CalledProcessError
 
diff --color -Naur swift/utils/sil-opt-verify-all-modules.py swift/utils/sil-opt-verify-all-modules.py
--- swift/utils/sil-opt-verify-all-modules.py	2024-06-20 13:39:17.951793627 -0500
+++ swift/utils/sil-opt-verify-all-modules.py	2024-06-20 13:40:50.278995757 -0500
@@ -13,7 +13,7 @@
 import glob
 import multiprocessing
 import os
-import pipes
+import shlex
 import subprocess
 import sys
 import tempfile
@@ -91,7 +91,7 @@
 
 
 def quote_shell_command(args):
-    return " ".join([pipes.quote(a) for a in args])
+    return " ".join([shlex.quote(a) for a in args])
 
 
 def run_commands_in_parallel(commands):
diff --color -Naur swift/utils/swift_build_support/swift_build_support/build_script_invocation.py swift/utils/swift_build_support/swift_build_support/build_script_invocation.py
--- swift/utils/swift_build_support/swift_build_support/build_script_invocation.py	2024-06-20 13:39:16.270680695 -0500
+++ swift/utils/swift_build_support/swift_build_support/build_script_invocation.py	2024-06-20 13:41:40.348359192 -0500
@@ -11,7 +11,7 @@
 # ===---------------------------------------------------------------------===#
 
 import os
-import pipes
+import shlex
 import platform
 
 from build_swift.build_swift import argparse
@@ -128,9 +128,9 @@
             "--build-jobs", str(args.build_jobs),
             "--lit-jobs", str(args.lit_jobs),
             "--common-cmake-options=%s" % ' '.join(
-                pipes.quote(opt) for opt in cmake.common_options()),
+                shlex.quote(opt) for opt in cmake.common_options()),
             "--build-args=%s" % ' '.join(
-                pipes.quote(arg) for arg in cmake.build_args()),
+                shlex.quote(arg) for arg in cmake.build_args()),
             "--dsymutil-jobs", str(args.dsymutil_jobs),
         ]
 
@@ -388,7 +388,7 @@
         if args.extra_cmake_options:
             impl_args += [
                 "--extra-cmake-options=%s" % ' '.join(
-                    pipes.quote(opt) for opt in args.extra_cmake_options)
+                    shlex.quote(opt) for opt in args.extra_cmake_options)
             ]
 
         if args.lto_type is not None:
diff --color -Naur swift/utils/swift_build_support/swift_build_support/shell.py swift/utils/swift_build_support/swift_build_support/shell.py
--- swift/utils/swift_build_support/swift_build_support/shell.py	2024-06-20 13:39:16.271680762 -0500
+++ swift/utils/swift_build_support/swift_build_support/shell.py	2024-06-20 13:42:02.214828084 -0500
@@ -14,7 +14,7 @@
 # ----------------------------------------------------------------------------
 
 import os
-import pipes
+import shlex
 import platform
 import shutil
 import subprocess
@@ -35,7 +35,7 @@
 
 
 def _quote(arg):
-    return pipes.quote(str(arg))
+    return shlex.quote(str(arg))
 
 
 def quote_command(args):