Disable _PyStack_AsTuple() inlining
Issue #29234: Inlining _PyStack_AsTuple() into callers increases their stack
consumption, Disable inlining to optimize the stack consumption.
Add _Py_NO_INLINE: use __attribute__((noinline)) of GCC and Clang.
It reduces the stack consumption, bytes per call, before => after:
test_python_call: 1040 => 976 (-64 B)
test_python_getitem: 976 => 912 (-64 B)
test_python_iterator: 1120 => 1056 (-64 B)
=> total: 3136 => 2944 (- 192 B)
diff --git a/Objects/abstract.c b/Objects/abstract.c
index 93bf87f..5726160 100644
--- a/Objects/abstract.c
+++ b/Objects/abstract.c
@@ -2256,7 +2256,9 @@
return _Py_CheckFunctionResult(callable, result, NULL);
}
-PyObject*
+/* Issue #29234: Inlining _PyStack_AsTuple() into callers increases their
+ stack consumption, Disable inlining to optimize the stack consumption. */
+PyObject* _Py_NO_INLINE
_PyStack_AsTuple(PyObject **stack, Py_ssize_t nargs)
{
PyObject *args;