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GH-125837: Split LOAD_CONST into three. (GH-125972)

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* Add LOAD_CONST_IMMORTAL opcode

* Add LOAD_SMALL_INT opcode

* Remove RETURN_CONST opcode
This commit is contained in:
Mark Shannon 2024-10-29 11:15:42 +00:00 • committed by GitHub
parent 67f5c5bd6f
commit faa3272fb8
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GPG key ID: B5690EEEBB952194
33 changed files with 706 additions and 538 deletions
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32
Python/bytecodes.c
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@ -255,10 +255,26 @@ dummy_func(
value2 = PyStackRef_DUP(GETLOCAL(oparg2));
}
family(LOAD_CONST, 0) = {
LOAD_CONST_IMMORTAL,
};
pure inst(LOAD_CONST, (-- value)) {
value = PyStackRef_FromPyObjectNew(GETITEM(FRAME_CO_CONSTS, oparg));
}
inst(LOAD_CONST_IMMORTAL, (-- value)) {
PyObject *obj = GETITEM(FRAME_CO_CONSTS, oparg);
assert(_Py_IsImmortal(obj));
value = PyStackRef_FromPyObjectImmortal(obj);
}
replicate(4) inst(LOAD_SMALL_INT, (-- value)) {
assert(oparg < _PY_NSMALLPOSINTS);
PyObject *obj = (PyObject *)&_PyLong_SMALL_INTS[_PY_NSMALLNEGINTS + oparg];
value = PyStackRef_FromPyObjectImmortal(obj);
}
replicate(8) inst(STORE_FAST, (value --)) {
SETLOCAL(oparg, value);
DEAD(value);
@ -979,10 +995,9 @@ dummy_func(
return result;
}
// The stack effect here is ambiguous.
// We definitely pop the return value off the stack on entry.
// We also push it onto the stack on exit, but that's a
// different frame, and it's accounted for by _PUSH_FRAME.
// The stack effect here is a bit misleading.
// retval is popped from the stack, but res
// is pushed to a different frame, the callers' frame.
inst(RETURN_VALUE, (retval -- res)) {
#if TIER_ONE
assert(frame != &entry_frame);
@ -1013,15 +1028,6 @@ dummy_func(
_RETURN_VALUE_EVENT +
RETURN_VALUE;
macro(RETURN_CONST) =
LOAD_CONST +
RETURN_VALUE;
macro(INSTRUMENTED_RETURN_CONST) =
LOAD_CONST +
_RETURN_VALUE_EVENT +
RETURN_VALUE;
inst(GET_AITER, (obj -- iter)) {
unaryfunc getter = NULL;
PyObject *obj_o = PyStackRef_AsPyObjectBorrow(obj);