fixup! fix(python): fix comparison to None

from PEP8 (https://peps.python.org/pep-0008/#programming-recommendations):

> Comparisons to singletons like None should always be done with is or
> is not, never the equality operators.

Author: e-kwsm

bolt/docs/generate_doc.py

@@ -45,7 +45,7 @@ def parse_bolt_options(output):
         cleaned_line = line.strip()
 
         if cleaned_line.casefold() in map(str.casefold, section_headers):
-            if prev_section != None:  # Save last option from prev section
+            if prev_section is not None:  # Save last option from prev section
                 add_info(sections, current_section, option, description)
                 option, description = None, []
 
@@ -76,7 +76,7 @@ def parse_bolt_options(output):
                 description = [descr]
                 if option.startswith("--print") or option.startswith("--time"):
                     current_section = "BOLT printing options:"
-                elif prev_section != None:
+                elif prev_section is not None:
                     current_section = prev_section
             continue
 

bolt/test/perf2bolt/lit.local.cfg

@@ -1,4 +1,4 @@
 import shutil
 
-if shutil.which("perf") != None:
+if shutil.which("perf") is not None:
     config.available_features.add("perf")

clang-tools-extra/clang-tidy/readability/IdentifierNamingCheck.cpp

@@ -1071,7 +1071,7 @@ bool IdentifierNamingCheck::isParamInMainLikeFunction(
   if (!IsIntType(FDecl->parameters()[0]->getType()))
     return false;
   MainType Type = IsCharPtrPtr(FDecl->parameters()[1]->getType());
-  if (Type == None)
+  if (Type is None)
     return false;
   if (FDecl->getNumParams() == 3 &&
       IsCharPtrPtr(FDecl->parameters()[2]->getType()) != Type)

lldb/bindings/interface/SBBreakpointDocstrings.i

@@ -39,7 +39,7 @@ TestBreakpointIgnoreCount.py),::
         #lldbutil.print_stacktraces(process)
         from lldbutil import get_stopped_thread
         thread = get_stopped_thread(process, lldb.eStopReasonBreakpoint)
-        self.assertTrue(thread != None, 'There should be a thread stopped due to breakpoint')
+        self.assertTrue(thread is not None, 'There should be a thread stopped due to breakpoint')
         frame0 = thread.GetFrameAtIndex(0)
         frame1 = thread.GetFrameAtIndex(1)
         frame2 = thread.GetFrameAtIndex(2)

lldb/bindings/interface/SBDataExtensions.i

@@ -40,19 +40,19 @@ STRING_EXTENSION_OUTSIDE(SBData)
                 lldbtarget = lldbdict['target']
             else:
                 lldbtarget = None
-            if target == None and lldbtarget != None and lldbtarget.IsValid():
+            if target is None and lldbtarget is not None and lldbtarget.IsValid():
                 target = lldbtarget
-            if ptr_size == None:
+            if ptr_size is None:
                 if target and target.IsValid():
                     ptr_size = target.addr_size
                 else:
                     ptr_size = 8
-            if endian == None:
+            if endian is None:
                 if target and target.IsValid():
                     endian = target.byte_order
                 else:
                     endian = lldbdict['eByteOrderLittle']
-            if size == None:
+            if size is None:
                 if value > 2147483647:
                     size = 8
                 elif value < -2147483648:

polly/lib/External/isl/interface/python.cc

@@ -347,7 +347,7 @@ static void print_persistent_callback_failure_check(int indent,
 		printf(fmt, 0);
 		printf(", '%s') and ", callback_name.c_str());
 		printf(fmt, 0);
-		printf(".%s['exc_info'] != None:\n", callback_name.c_str());
+		printf(".%s['exc_info'] is not None:\n", callback_name.c_str());
 		print_indent(indent, "    exc_info = ");
 		printf(fmt, 0);
 		printf(".%s['exc_info'][0]\n", callback_name.c_str());

polly/test/lit.site.cfg.in

@@ -14,7 +14,7 @@ config.extra_paths = "@POLLY_TEST_EXTRA_PATHS@".split(";")
 ## Check the current platform with regex
 import re
 EAT_ERR_ON_X86 = ' '
-if (re.match(r'^x86_64*', '@LLVM_TARGET_TRIPLE@') == None) :
+if (re.match(r'^x86_64*', '@LLVM_TARGET_TRIPLE@') is None) :
   EAT_ERR_ON_X86 = '|| echo \"error is eaten\"'
 
 for arch in config.targets_to_build.split():

utils/bazel/configure.bzl

@@ -110,7 +110,7 @@ def _extract_cmake_settings(repository_ctx, llvm_cmake):
         # Skip if `CMAKE_CXX_STANDARD` is set with
         # `LLVM_REQUIRED_CXX_STANDARD`.
         # Then `v` will not be desired form, like "${...} CACHE"
-        if c[k] != None:
+        if c[k] is not None:
             continue
 
         # Pick up 1st word as the value.
@@ -160,7 +160,7 @@ def _llvm_configure_impl(repository_ctx):
         repository_ctx,
         "cmake/Modules/LLVMVersion.cmake",
     )
-    version = {k: v for k, v in version.items() if v != None}
+    version = {k: v for k, v in version.items() if v is not None}
     vars.update(version)
 
     _write_dict_to_file(