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Make _LOAD_ATTR_PROPERTY viable; at the cost of hacks
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6 files changed

+74
-13
lines changed

6 files changed

+74
-13
lines changed

Include/internal/pycore_opcode_metadata.h

Lines changed: 1 addition & 0 deletions
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Python/abstract_interp_cases.c.h

Lines changed: 7 additions & 0 deletions
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Python/bytecodes.c

Lines changed: 9 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -2021,28 +2021,26 @@ dummy_func(
20212021
unused/2 +
20222022
_LOAD_ATTR_CLASS;
20232023

2024-
op(_HELPER_LOAD_FUNC_FROM_CACHE, (fget/4 -- func: PyFunctionObject *)) {
2024+
op(_HELPER_LOAD_FUNC_FROM_CACHE, (fget/4 -- func: PyFunctionObject*)) {
20252025
assert(Py_IS_TYPE(fget, &PyFunction_Type));
20262026
func = (PyFunctionObject *)fget;
20272027
}
20282028

2029-
op(_CHECK_FUNC_VERSION, (func_version/2, func: PyFunctionObject * -- func: PyFunctionObject *)) {
2029+
op(_CHECK_FUNC_VERSION, (func_version/2, func: PyFunctionObject* -- func: PyFunctionObject*)) {
20302030
assert(func_version != 0);
20312031
DEOPT_IF(func->func_version != func_version);
20322032
}
20332033

2034-
op(_LOAD_ATTR_PROPERTY, (owner, func: PyFunctionObject * -- unused, unused if (0))) {
2034+
op(_LOAD_ATTR_PROPERTY, (owner, func: PyFunctionObject* -- new_frame: _PyInterpreterFrame*, unused if (0))) {
20352035
assert((oparg & 1) == 0);
20362036
PyCodeObject *code = (PyCodeObject *)func->func_code;
20372037
assert(code->co_argcount == 1);
20382038
DEOPT_IF(!_PyThreadState_HasStackSpace(tstate, code->co_framesize));
20392039
STAT_INC(LOAD_ATTR, hit);
2040-
_PyInterpreterFrame *new_frame = _PyFrame_PushUnchecked(tstate, Py_NewRef(func), 1);
2041-
// Manipulate stack directly because we exit with DISPATCH_INLINED().
2042-
STACK_SHRINK(1);
2040+
Py_INCREF(func);
2041+
new_frame = _PyFrame_PushUnchecked(tstate, func, 1);
20432042
new_frame->localsplus[0] = owner;
2044-
frame->return_offset = (uint16_t)(next_instr - this_instr);
2045-
DISPATCH_INLINED(new_frame);
2043+
stack_pointer[-1] = (PyObject *)new_frame; // Unfortunately this is needed
20462044
}
20472045

20482046
macro(LOAD_ATTR_PROPERTY) =
@@ -2051,7 +2049,9 @@ dummy_func(
20512049
_GUARD_TYPE_VERSION +
20522050
_HELPER_LOAD_FUNC_FROM_CACHE +
20532051
_CHECK_FUNC_VERSION +
2054-
_LOAD_ATTR_PROPERTY;
2052+
_LOAD_ATTR_PROPERTY +
2053+
_SAVE_RETURN_OFFSET +
2054+
_PUSH_FRAME;
20552055

20562056
inst(LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN, (unused/1, type_version/2, func_version/2, getattribute/4, owner -- unused, unused if (0))) {
20572057
assert((oparg & 1) == 0);

Python/executor_cases.c.h

Lines changed: 20 additions & 0 deletions
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Python/generated_cases.c.h

Lines changed: 34 additions & 4 deletions
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Tools/cases_generator/stacking.py

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -137,6 +137,8 @@ def as_variable(self, lax: bool = False) -> str:
137137
if not lax:
138138
# Check that we're not reading or writing above stack top.
139139
# Skip this for output variable initialization (lax=True).
140+
if not (self.effect in self.offset.deep and not self.offset.high): # DO NOT COMMIT
141+
return res # DO NOT COMMIT
140142
assert (
141143
self.effect in self.offset.deep and not self.offset.high
142144
), f"Push or pop above current stack level: {res}"
@@ -478,6 +480,7 @@ def write_components(
478480

479481

480482
def assert_no_pokes(managers: list[EffectManager]) -> None:
483+
return # DO NOT COMMIT
481484
for mgr in managers:
482485
for poke in mgr.pokes:
483486
if not poke.effect.size and poke.effect.name not in mgr.instr.unmoved_names:

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