fix news and formatting

Author: Fidget-Spinner

Include/internal/pycore_code.h

@@ -309,7 +309,7 @@ int _Py_Specialize_LoadMethod(PyObject *owner, _Py_CODEUNIT *instr, PyObject *na
 int _Py_Specialize_BinarySubscr(PyObject *sub, PyObject *container, _Py_CODEUNIT *instr);
 int _Py_Specialize_BinaryAdd(PyObject *left, PyObject *right, _Py_CODEUNIT *instr);
 int _Py_Specialize_BinaryMultiply(PyObject *left, PyObject *right, _Py_CODEUNIT *instr);
-_Py_Specialize_CallFunction(PyObject *callable, _Py_CODEUNIT *instr, int nargs, SpecializedCacheEntry *cache, PyObject *builtins);
+int _Py_Specialize_CallFunction(PyObject *callable, _Py_CODEUNIT *instr, int nargs, SpecializedCacheEntry *cache, PyObject *builtins);
 
 #define PRINT_SPECIALIZATION_STATS 0
 #define PRINT_SPECIALIZATION_STATS_DETAILED 9

Misc/NEWS.d/next/Core and Builtins/2021-06-28-22-23-59.bpo-44525.sSvUKG.rst

@@ -1,6 +1,10 @@
 Setup initial specialization infrastructure for the ``CALL_FUNCTION`` opcode.
-Implemented two initial specializations for ``PyCFunctionObject``:
+Implemented initial specializations for C function calls:
 
 * ``CALL_FUNCTION_BUILTIN_O`` for ``METH_O`` flag.
 
 * ``CALL_FUNCTION_BUILTIN_FAST`` for ``METH_FASTCALL`` flag without keywords.
+
+* ``CALL_FUNCTION_LEN`` for ``len(o)``.
+
+* ``CALL_FUNCTION_ISINSTANCE`` for ``isinstance(o, t)``.

Python/specialize.c

@@ -1241,7 +1241,6 @@ static int
 specialize_c_call(PyObject *callable, _Py_CODEUNIT *instr, int nargs,
     SpecializedCacheEntry *cache, PyObject *builtins)
 {
-    _PyAdaptiveEntry *cache0 = &cache->adaptive;
     _PyObjectCache *cache1 = &cache[-1].obj;
     if (PyCFunction_GET_FUNCTION(callable) == NULL) {
         return 1;