bpo-39245: Switch to public API for Vectorcall (GH-18460)

The bulk of this patch was generated automatically with:

    for name in \
        PyObject_Vectorcall \
        Py_TPFLAGS_HAVE_VECTORCALL \
        PyObject_VectorcallMethod \
        PyVectorcall_Function \
        PyObject_CallOneArg \
        PyObject_CallMethodNoArgs \
        PyObject_CallMethodOneArg \
    ;
    do
        echo $name
        git grep -lwz _$name | xargs -0 sed -i "s/\b_$name\b/$name/g"
    done

    old=_PyObject_FastCallDict
    new=PyObject_VectorcallDict
    git grep -lwz $old | xargs -0 sed -i "s/\b$old\b/$new/g"

and then cleaned up:

- Revert changes to in docs & news
- Revert changes to backcompat defines in headers
- Nudge misaligned comments

1 files changed, 6 insertions, 6 deletions

diff --git a/Python/ceval.c b/Python/ceval.c
index deba99e..eb0f131 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -1874,7 +1874,7 @@ main_loop:
                 Py_DECREF(value);
                 goto error;
             }
-            res = _PyObject_CallOneArg(hook, value);
+            res = PyObject_CallOneArg(hook, value);
             Py_DECREF(value);
             if (res == NULL)
                 goto error;
@@ -3271,7 +3271,7 @@ main_loop:
             assert(!PyLong_Check(exc));
             exit_func = PEEK(7);
             PyObject *stack[4] = {NULL, exc, val, tb};
-            res = _PyObject_Vectorcall(exit_func, stack + 1,
+            res = PyObject_Vectorcall(exit_func, stack + 1,
                     3 | PY_VECTORCALL_ARGUMENTS_OFFSET, NULL);
             if (res == NULL)
                 goto error;
@@ -4846,7 +4846,7 @@ trace_call_function(PyThreadState *tstate,
 {
     PyObject *x;
     if (PyCFunction_Check(func)) {
-        C_TRACE(x, _PyObject_Vectorcall(func, args, nargs, kwnames));
+        C_TRACE(x, PyObject_Vectorcall(func, args, nargs, kwnames));
         return x;
     }
     else if (Py_TYPE(func) == &PyMethodDescr_Type && nargs > 0) {
@@ -4862,13 +4862,13 @@ trace_call_function(PyThreadState *tstate,
         if (func == NULL) {
             return NULL;
         }
-        C_TRACE(x, _PyObject_Vectorcall(func,
+        C_TRACE(x, PyObject_Vectorcall(func,
                                         args+1, nargs-1,
                                         kwnames));
         Py_DECREF(func);
         return x;
     }
-    return _PyObject_Vectorcall(func, args, nargs | PY_VECTORCALL_ARGUMENTS_OFFSET, kwnames);
+    return PyObject_Vectorcall(func, args, nargs | PY_VECTORCALL_ARGUMENTS_OFFSET, kwnames);
 }
 
 /* Issue #29227: Inline call_function() into _PyEval_EvalFrameDefault()
@@ -4887,7 +4887,7 @@ call_function(PyThreadState *tstate, PyObject ***pp_stack, Py_ssize_t oparg, PyO
         x = trace_call_function(tstate, func, stack, nargs, kwnames);
     }
     else {
-        x = _PyObject_Vectorcall(func, stack, nargs | PY_VECTORCALL_ARGUMENTS_OFFSET, kwnames);
+        x = PyObject_Vectorcall(func, stack, nargs | PY_VECTORCALL_ARGUMENTS_OFFSET, kwnames);
     }
 
     assert((x != NULL) ^ (_PyErr_Occurred(tstate) != NULL));