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

Replace _PyObject_FastCall() calls with PyObject_Vectorcall().

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* stack[5];
-
-    import_func = _PyDict_GetItemWithError(frame->f_builtins, &_Py_ID(__import__));
+    PyObject *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);
-
-    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);
+    PyObject *res = PyObject_Vectorcall(import_func, args, 5, NULL);
     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];
-        stack[0] = typ;
-        stack[1] = exc;
-        stack[2] = tb;
-        PyObject *result = _PyObject_FastCall(hook, stack, 3);
+        PyObject* args[3] = {typ, exc, tb};
+        PyObject *result = PyObject_Vectorcall(hook, args, 3, NULL);
         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);
             }