gh-90928: Improve static initialization of keywords tuple in AC (#95907)

1 files changed, 92 insertions, 222 deletions

diff --git a/Modules/_sre/clinic/sre.c.h b/Modules/_sre/clinic/sre.c.h
index dc5c6c1..711e16a 100644
--- a/Modules/_sre/clinic/sre.c.h
+++ b/Modules/_sre/clinic/sre.c.h
@@ -181,18 +181,9 @@ static PyObject *
 _sre_SRE_Pattern_match(PatternObject *self, PyTypeObject *cls, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 3
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 3
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -201,13 +192,12 @@ _sre_SRE_Pattern_match(PatternObject *self, PyTypeObject *cls, PyObject *const *
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(string), &_Py_ID(pos), &_Py_ID(endpos), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"string", "pos", "endpos", NULL};
     static _PyArg_Parser _parser = {
@@ -284,18 +274,9 @@ static PyObject *
 _sre_SRE_Pattern_fullmatch(PatternObject *self, PyTypeObject *cls, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 3
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 3
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -304,13 +285,12 @@ _sre_SRE_Pattern_fullmatch(PatternObject *self, PyTypeObject *cls, PyObject *con
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(string), &_Py_ID(pos), &_Py_ID(endpos), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"string", "pos", "endpos", NULL};
     static _PyArg_Parser _parser = {
@@ -389,18 +369,9 @@ static PyObject *
 _sre_SRE_Pattern_search(PatternObject *self, PyTypeObject *cls, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 3
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 3
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -409,13 +380,12 @@ _sre_SRE_Pattern_search(PatternObject *self, PyTypeObject *cls, PyObject *const
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(string), &_Py_ID(pos), &_Py_ID(endpos), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"string", "pos", "endpos", NULL};
     static _PyArg_Parser _parser = {
@@ -491,18 +461,9 @@ static PyObject *
 _sre_SRE_Pattern_findall(PatternObject *self, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 3
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 3
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -511,13 +472,12 @@ _sre_SRE_Pattern_findall(PatternObject *self, PyObject *const *args, Py_ssize_t
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(string), &_Py_ID(pos), &_Py_ID(endpos), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"string", "pos", "endpos", NULL};
     static _PyArg_Parser _parser = {
@@ -596,18 +556,9 @@ static PyObject *
 _sre_SRE_Pattern_finditer(PatternObject *self, PyTypeObject *cls, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 3
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 3
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -616,13 +567,12 @@ _sre_SRE_Pattern_finditer(PatternObject *self, PyTypeObject *cls, PyObject *cons
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(string), &_Py_ID(pos), &_Py_ID(endpos), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"string", "pos", "endpos", NULL};
     static _PyArg_Parser _parser = {
@@ -698,18 +648,9 @@ static PyObject *
 _sre_SRE_Pattern_scanner(PatternObject *self, PyTypeObject *cls, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 3
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 3
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -718,13 +659,12 @@ _sre_SRE_Pattern_scanner(PatternObject *self, PyTypeObject *cls, PyObject *const
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(string), &_Py_ID(pos), &_Py_ID(endpos), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"string", "pos", "endpos", NULL};
     static _PyArg_Parser _parser = {
@@ -800,18 +740,9 @@ static PyObject *
 _sre_SRE_Pattern_split(PatternObject *self, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 2
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 2
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -820,13 +751,12 @@ _sre_SRE_Pattern_split(PatternObject *self, PyObject *const *args, Py_ssize_t na
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(string), &_Py_ID(maxsplit), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"string", "maxsplit", NULL};
     static _PyArg_Parser _parser = {
@@ -884,18 +814,9 @@ static PyObject *
 _sre_SRE_Pattern_sub(PatternObject *self, PyTypeObject *cls, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 3
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 3
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -904,13 +825,12 @@ _sre_SRE_Pattern_sub(PatternObject *self, PyTypeObject *cls, PyObject *const *ar
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(repl), &_Py_ID(string), &_Py_ID(count), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"repl", "string", "count", NULL};
     static _PyArg_Parser _parser = {
@@ -971,18 +891,9 @@ static PyObject *
 _sre_SRE_Pattern_subn(PatternObject *self, PyTypeObject *cls, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 3
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 3
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -991,13 +902,12 @@ _sre_SRE_Pattern_subn(PatternObject *self, PyTypeObject *cls, PyObject *const *a
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(repl), &_Py_ID(string), &_Py_ID(count), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"repl", "string", "count", NULL};
     static _PyArg_Parser _parser = {
@@ -1083,18 +993,9 @@ static PyObject *
 _sre_compile(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 6
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 6
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -1103,13 +1004,12 @@ _sre_compile(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObject
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(pattern), &_Py_ID(flags), &_Py_ID(code), &_Py_ID(groups), &_Py_ID(groupindex), &_Py_ID(indexgroup), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"pattern", "flags", "code", "groups", "groupindex", "indexgroup", NULL};
     static _PyArg_Parser _parser = {
@@ -1184,18 +1084,9 @@ static PyObject *
 _sre_SRE_Match_expand(MatchObject *self, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 1
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 1
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -1204,13 +1095,12 @@ _sre_SRE_Match_expand(MatchObject *self, PyObject *const *args, Py_ssize_t nargs
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(template), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"template", NULL};
     static _PyArg_Parser _parser = {
@@ -1252,18 +1142,9 @@ static PyObject *
 _sre_SRE_Match_groups(MatchObject *self, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 1
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 1
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -1272,13 +1153,12 @@ _sre_SRE_Match_groups(MatchObject *self, PyObject *const *args, Py_ssize_t nargs
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(default), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"default", NULL};
     static _PyArg_Parser _parser = {
@@ -1325,18 +1205,9 @@ static PyObject *
 _sre_SRE_Match_groupdict(MatchObject *self, PyObject *const *args, Py_ssize_t nargs, PyObject *kwnames)
 {
     PyObject *return_value = NULL;
-    #define NUM_KEYWORDS 1
-    #if NUM_KEYWORDS == 0
-
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
-    #    define KWTUPLE (PyObject *)&_Py_SINGLETON(tuple_empty)
-    #  else
-    #    define KWTUPLE NULL
-    #  endif
-
-    #else  // NUM_KEYWORDS != 0
-    #  if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
+    #if defined(Py_BUILD_CORE) && !defined(Py_BUILD_CORE_MODULE)
 
+    #define NUM_KEYWORDS 1
     static struct {
         PyGC_Head _this_is_not_used;
         PyObject_VAR_HEAD
@@ -1345,13 +1216,12 @@ _sre_SRE_Match_groupdict(MatchObject *self, PyObject *const *args, Py_ssize_t na
         .ob_base = PyVarObject_HEAD_INIT(&PyTuple_Type, NUM_KEYWORDS)
         .ob_item = { &_Py_ID(default), },
     };
-    #  define KWTUPLE (&_kwtuple.ob_base.ob_base)
-
-    #  else  // !Py_BUILD_CORE
-    #    define KWTUPLE NULL
-    #  endif  // !Py_BUILD_CORE
-    #endif  // NUM_KEYWORDS != 0
     #undef NUM_KEYWORDS
+    #define KWTUPLE (&_kwtuple.ob_base.ob_base)
+
+    #else  // !Py_BUILD_CORE
+    #  define KWTUPLE NULL
+    #endif  // !Py_BUILD_CORE
 
     static const char * const _keywords[] = {"default", NULL};
     static _PyArg_Parser _parser = {
@@ -1551,4 +1421,4 @@ _sre_SRE_Scanner_search(ScannerObject *self, PyTypeObject *cls, PyObject *const
     }
     return _sre_SRE_Scanner_search_impl(self, cls);
 }
-/*[clinic end generated code: output=d686111c67a7d0aa input=a9049054013a1b77]*/
+/*[clinic end generated code: output=14ea86f85c130a7b input=a9049054013a1b77]*/