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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
@@ -2043,28 +2043,26 @@ dummy_func(
20432043
unused/2 +
20442044
_LOAD_ATTR_CLASS;
20452045

2046-
op(_HELPER_LOAD_FUNC_FROM_CACHE, (fget/4 -- func: PyFunctionObject *)) {
2046+
op(_HELPER_LOAD_FUNC_FROM_CACHE, (fget/4 -- func: PyFunctionObject*)) {
20472047
assert(Py_IS_TYPE(fget, &PyFunction_Type));
20482048
func = (PyFunctionObject *)fget;
20492049
}
20502050

2051-
op(_CHECK_FUNC_VERSION, (func_version/2, func: PyFunctionObject * -- func: PyFunctionObject *)) {
2051+
op(_CHECK_FUNC_VERSION, (func_version/2, func: PyFunctionObject* -- func: PyFunctionObject*)) {
20522052
assert(func_version != 0);
20532053
DEOPT_IF(func->func_version != func_version);
20542054
}
20552055

2056-
op(_LOAD_ATTR_PROPERTY, (owner, func: PyFunctionObject * -- unused, unused if (0))) {
2056+
op(_LOAD_ATTR_PROPERTY, (owner, func: PyFunctionObject* -- new_frame: _PyInterpreterFrame*, unused if (0))) {
20572057
assert((oparg & 1) == 0);
20582058
PyCodeObject *code = (PyCodeObject *)func->func_code;
20592059
assert(code->co_argcount == 1);
20602060
DEOPT_IF(!_PyThreadState_HasStackSpace(tstate, code->co_framesize));
20612061
STAT_INC(LOAD_ATTR, hit);
2062-
_PyInterpreterFrame *new_frame = _PyFrame_PushUnchecked(tstate, Py_NewRef(func), 1);
2063-
// Manipulate stack directly because we exit with DISPATCH_INLINED().
2064-
STACK_SHRINK(1);
2062+
Py_INCREF(func);
2063+
new_frame = _PyFrame_PushUnchecked(tstate, func, 1);
20652064
new_frame->localsplus[0] = owner;
2066-
frame->return_offset = (uint16_t)(next_instr - this_instr);
2067-
DISPATCH_INLINED(new_frame);
2065+
stack_pointer[-1] = (PyObject *)new_frame; // Unfortunately this is needed
20682066
}
20692067

20702068
macro(LOAD_ATTR_PROPERTY) =
@@ -2073,7 +2071,9 @@ dummy_func(
20732071
_GUARD_TYPE_VERSION +
20742072
_HELPER_LOAD_FUNC_FROM_CACHE +
20752073
_CHECK_FUNC_VERSION +
2076-
_LOAD_ATTR_PROPERTY;
2074+
_LOAD_ATTR_PROPERTY +
2075+
_SAVE_RETURN_OFFSET +
2076+
_PUSH_FRAME;
20772077

20782078
inst(LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN, (unused/1, type_version/2, func_version/2, getattribute/4, owner -- unused, unused if (0))) {
20792079
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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