gh-106023: Update code using _PyObject_FastCall() (#106257)

Replace _PyObject_FastCall() calls with PyObject_Vectorcall().

Modules/_elementtree.c

@@ -882,7 +882,6 @@ LOCAL(PyObject *)
 deepcopy(elementtreestate *st, PyObject *object, PyObject *memo)
 {
     /* do a deep copy of the given object */
-    PyObject *stack[2];
 
     /* Fast paths */
     if (object == Py_None || PyUnicode_CheckExact(object)) {
@@ -917,9 +916,8 @@ deepcopy(elementtreestate *st, PyObject *object, PyObject *memo)
         return NULL;
     }
 
-    stack[0] = object;
+    PyObject *args[2] = {object, memo};
-    stack[1] = memo;
+    return PyObject_Vectorcall(st->deepcopy_obj, args, 2, NULL);
-    return _PyObject_FastCall(st->deepcopy_obj, stack, 2);
 }
 
 
@@ -2852,14 +2850,14 @@ treebuilder_handle_pi(TreeBuilderObject* self, PyObject* target, PyObject* text)
 {
     PyObject* pi;
     PyObject* this;
-    PyObject* stack[2] = {target, text};
 
     if (treebuilder_flush_data(self) < 0) {
         return NULL;
     }
 
     if (self->pi_factory) {
-        pi = _PyObject_FastCall(self->pi_factory, stack, 2);
+        PyObject* args[2] = {target, text};
+        pi = PyObject_Vectorcall(self->pi_factory, args, 2, NULL);
         if (!pi) {
             return NULL;
         }
@@ -3372,7 +3370,6 @@ expat_start_ns_handler(XMLParserObject* self, const XML_Char* prefix_in,
     PyObject* res = NULL;
     PyObject* uri;
     PyObject* prefix;
-    PyObject* stack[2];
 
     if (PyErr_Occurred())
         return;
@@ -3411,9 +3408,8 @@ expat_start_ns_handler(XMLParserObject* self, const XML_Char* prefix_in,
             return;
         }
 
-        stack[0] = prefix;
+        PyObject* args[2] = {prefix, uri};
-        stack[1] = uri;
+        res = PyObject_Vectorcall(self->handle_start_ns, args, 2, NULL);
-        res = _PyObject_FastCall(self->handle_start_ns, stack, 2);
         Py_DECREF(uri);
         Py_DECREF(prefix);
     }
@@ -3551,7 +3547,6 @@ expat_pi_handler(XMLParserObject* self, const XML_Char* target_in,
     PyObject* pi_target;
     PyObject* data;
     PyObject* res;
-    PyObject* stack[2];
 
     if (PyErr_Occurred())
         return;
@@ -3581,9 +3576,8 @@ expat_pi_handler(XMLParserObject* self, const XML_Char* target_in,
         if (!data)
             goto error;
 
-        stack[0] = pi_target;
+        PyObject* args[2] = {pi_target, data};
-        stack[1] = data;
+        res = PyObject_Vectorcall(self->handle_pi, args, 2, NULL);
-        res = _PyObject_FastCall(self->handle_pi, stack, 2);
         Py_XDECREF(res);
         Py_DECREF(data);
         Py_DECREF(pi_target);

Modules/_functoolsmodule.c

@@ -594,21 +594,15 @@ keyobject_call(keyobject *ko, PyObject *args, PyObject *kwds)
 static PyObject *
 keyobject_richcompare(PyObject *ko, PyObject *other, int op)
 {
-    PyObject *res;
-    PyObject *x;
-    PyObject *y;
-    PyObject *compare;
-    PyObject *answer;
-    PyObject* stack[2];
-
     if (!Py_IS_TYPE(other, Py_TYPE(ko))) {
         PyErr_Format(PyExc_TypeError, "other argument must be K instance");
         return NULL;
     }
-    compare = ((keyobject *) ko)->cmp;
+
+    PyObject *compare = ((keyobject *) ko)->cmp;
     assert(compare != NULL);
-    x = ((keyobject *) ko)->object;
+    PyObject *x = ((keyobject *) ko)->object;
-    y = ((keyobject *) other)->object;
+    PyObject *y = ((keyobject *) other)->object;
     if (!x || !y){
         PyErr_Format(PyExc_AttributeError, "object");
         return NULL;
@@ -617,14 +611,13 @@ keyobject_richcompare(PyObject *ko, PyObject *other, int op)
     /* Call the user's comparison function and translate the 3-way
      * result into true or false (or error).
      */
-    stack[0] = x;
+    PyObject* args[2] = {x, y};
-    stack[1] = y;
+    PyObject *res = PyObject_Vectorcall(compare, args, 2, NULL);
-    res = _PyObject_FastCall(compare, stack, 2);
     if (res == NULL) {
         return NULL;
     }
 
-    answer = PyObject_RichCompare(res, _PyLong_GetZero(), op);
+    PyObject *answer = PyObject_RichCompare(res, _PyLong_GetZero(), op);
     Py_DECREF(res);
     return answer;
 }

Objects/typeobject.c

@@ -10013,7 +10013,8 @@ static int
 type_new_init_subclass(PyTypeObject *type, PyObject *kwds)
 {
     PyObject *args[2] = {(PyObject *)type, (PyObject *)type};
-    PyObject *super = _PyObject_FastCall((PyObject *)&PySuper_Type, args, 2);
+    PyObject *super = PyObject_Vectorcall((PyObject *)&PySuper_Type,
+                                          args, 2, NULL);
     if (super == NULL) {
         return -1;
     }

Parser/pegen.c

@@ -465,7 +465,6 @@ _PyPegen_new_identifier(Parser *p, const char *n)
        identifier; if so, normalize to NFKC. */
     if (!PyUnicode_IS_ASCII(id))
     {
-        PyObject *id2;
         if (!init_normalization(p))
         {
             Py_DECREF(id);
@@ -478,12 +477,13 @@ _PyPegen_new_identifier(Parser *p, const char *n)
             goto error;
         }
         PyObject *args[2] = {form, id};
-        id2 = _PyObject_FastCall(p->normalize, args, 2);
+        PyObject *id2 = PyObject_Vectorcall(p->normalize, args, 2, NULL);
         Py_DECREF(id);
         Py_DECREF(form);
         if (!id2) {
             goto error;
         }
+
         if (!PyUnicode_Check(id2))
         {
             PyErr_Format(PyExc_TypeError,

Python/bytecodes.c

@@ -8,7 +8,6 @@
 
 #include "Python.h"
 #include "pycore_abstract.h"      // _PyIndex_Check()
-#include "pycore_call.h"          // _PyObject_FastCallDictTstate()
 #include "pycore_ceval.h"         // _PyEval_SignalAsyncExc()
 #include "pycore_code.h"
 #include "pycore_function.h"

Python/ceval.c

@@ -4,7 +4,7 @@
 
 #include "Python.h"
 #include "pycore_abstract.h"      // _PyIndex_Check()
-#include "pycore_call.h"          // _PyObject_FastCallDictTstate()
+#include "pycore_call.h"          // _PyObject_CallNoArgs()
 #include "pycore_ceval.h"         // _PyEval_SignalAsyncExc()
 #include "pycore_code.h"
 #include "pycore_function.h"
@@ -2431,40 +2431,37 @@ static PyObject *
 import_name(PyThreadState *tstate, _PyInterpreterFrame *frame,
             PyObject *name, PyObject *fromlist, PyObject *level)
 {
-    PyObject *import_func, *res;
+    PyObject *import_func = _PyDict_GetItemWithError(frame->f_builtins,
-    PyObject* stack[5];
+                                                     &_Py_ID(__import__));
-
-    import_func = _PyDict_GetItemWithError(frame->f_builtins, &_Py_ID(__import__));
     if (import_func == NULL) {
         if (!_PyErr_Occurred(tstate)) {
             _PyErr_SetString(tstate, PyExc_ImportError, "__import__ not found");
         }
         return NULL;
     }
+
     PyObject *locals = frame->f_locals;
+    if (locals == NULL) {
+        locals = Py_None;
+    }
+
     /* Fast path for not overloaded __import__. */
     if (_PyImport_IsDefaultImportFunc(tstate->interp, import_func)) {
         int ilevel = _PyLong_AsInt(level);
         if (ilevel == -1 && _PyErr_Occurred(tstate)) {
             return NULL;
         }
-        res = PyImport_ImportModuleLevelObject(
+        return PyImport_ImportModuleLevelObject(
                         name,
                         frame->f_globals,
-                        locals == NULL ? Py_None :locals,
+                        locals,
                         fromlist,
                         ilevel);
-        return res;
     }
 
+    PyObject* args[5] = {name, frame->f_globals, locals, fromlist, level};
     Py_INCREF(import_func);
-
+    PyObject *res = PyObject_Vectorcall(import_func, args, 5, NULL);
-    stack[0] = name;
-    stack[1] = frame->f_globals;
-    stack[2] = locals == NULL ? Py_None : locals;
-    stack[3] = fromlist;
-    stack[4] = level;
-    res = _PyObject_FastCall(import_func, stack, 5);
     Py_DECREF(import_func);
     return res;
 }

Python/pythonrun.c

@@ -834,11 +834,8 @@ _PyErr_PrintEx(PyThreadState *tstate, int set_sys_last_vars)
         _PyErr_WriteUnraisableMsg("in audit hook", NULL);
     }
     if (hook) {
-        PyObject* stack[3];
+        PyObject* args[3] = {typ, exc, tb};
-        stack[0] = typ;
+        PyObject *result = PyObject_Vectorcall(hook, args, 3, NULL);
-        stack[1] = exc;
-        stack[2] = tb;
-        PyObject *result = _PyObject_FastCall(hook, stack, 3);
         if (result == NULL) {
             handle_system_exit();
 

Python/sysmodule.c

@@ -268,7 +268,7 @@ sys_audit_tstate(PyThreadState *ts, const char *event,
                 PyThreadState_LeaveTracing(ts);
             }
             PyObject* args[2] = {eventName, eventArgs};
-            o = _PyObject_FastCallTstate(ts, hook, args, 2);
+            o = _PyObject_VectorcallTstate(ts, hook, args, 2, NULL);
             if (canTrace) {
                 PyThreadState_EnterTracing(ts);
             }