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GH-118093: Add tier two support for LOAD_ATTR_PROPERTY (GH-122283)

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Brandt Bucher 2024-07-25 10:45:28 -07:00 • committed by GitHub
parent 5e686ff57d
commit 5f6001130f
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9 changed files with 168 additions and 99 deletions
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30
Python/bytecodes.c
View file

@ -2243,32 +2243,30 @@ dummy_func(
unused/2 +
_LOAD_ATTR_CLASS;
inst(LOAD_ATTR_PROPERTY, (unused/1, type_version/2, func_version/2, fget/4, owner -- unused, unused if (0))) {
PyObject *owner_o = PyStackRef_AsPyObjectBorrow(owner);
op(_LOAD_ATTR_PROPERTY_FRAME, (fget/4, owner -- new_frame: _PyInterpreterFrame *)) {
assert((oparg & 1) == 0);
DEOPT_IF(tstate->interp->eval_frame);
PyTypeObject *cls = Py_TYPE(owner_o);
assert(type_version != 0);
DEOPT_IF(cls->tp_version_tag != type_version);
assert(Py_IS_TYPE(fget, &PyFunction_Type));
PyFunctionObject *f = (PyFunctionObject *)fget;
assert(func_version != 0);
DEOPT_IF(f->func_version != func_version);
PyCodeObject *code = (PyCodeObject *)f->func_code;
assert(code->co_argcount == 1);
DEOPT_IF((code->co_flags & (CO_VARKEYWORDS | CO_VARARGS | CO_OPTIMIZED)) != CO_OPTIMIZED);
DEOPT_IF(code->co_kwonlyargcount);
DEOPT_IF(code->co_argcount != 1);
DEOPT_IF(!_PyThreadState_HasStackSpace(tstate, code->co_framesize));
STAT_INC(LOAD_ATTR, hit);
Py_INCREF(fget);
_PyInterpreterFrame *new_frame = _PyFrame_PushUnchecked(tstate, f, 1);
// Manipulate stack directly because we exit with DISPATCH_INLINED().
STACK_SHRINK(1);
new_frame = _PyFrame_PushUnchecked(tstate, f, 1);
new_frame->localsplus[0] = owner;
frame->return_offset = (uint16_t)(next_instr - this_instr);
DISPATCH_INLINED(new_frame);
}
macro(LOAD_ATTR_PROPERTY) =
unused/1 +
_CHECK_PEP_523 +
_GUARD_TYPE_VERSION +
unused/2 +
_LOAD_ATTR_PROPERTY_FRAME +
_SAVE_RETURN_OFFSET +
_PUSH_FRAME;
inst(LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN, (unused/1, type_version/2, func_version/2, getattribute/4, owner -- unused, unused if (0))) {
PyObject *owner_o = PyStackRef_AsPyObjectBorrow(owner);

34
Python/executor_cases.c.h generated
View file

@ -2507,7 +2507,39 @@
/* _LOAD_ATTR_CLASS is split on (oparg & 1) */
/* _LOAD_ATTR_PROPERTY is not a viable micro-op for tier 2 because it uses the 'this_instr' variable */
case _LOAD_ATTR_PROPERTY_FRAME: {
_PyStackRef owner;
_PyInterpreterFrame *new_frame;
oparg = CURRENT_OPARG();
owner = stack_pointer[-1];
PyObject *fget = (PyObject *)CURRENT_OPERAND();
assert((oparg & 1) == 0);
assert(Py_IS_TYPE(fget, &PyFunction_Type));
PyFunctionObject *f = (PyFunctionObject *)fget;
PyCodeObject *code = (PyCodeObject *)f->func_code;
if ((code->co_flags & (CO_VARKEYWORDS | CO_VARARGS | CO_OPTIMIZED)) != CO_OPTIMIZED) {
UOP_STAT_INC(uopcode, miss);
JUMP_TO_JUMP_TARGET();
}
if (code->co_kwonlyargcount) {
UOP_STAT_INC(uopcode, miss);
JUMP_TO_JUMP_TARGET();
}
if (code->co_argcount != 1) {
UOP_STAT_INC(uopcode, miss);
JUMP_TO_JUMP_TARGET();
}
if (!_PyThreadState_HasStackSpace(tstate, code->co_framesize)) {
UOP_STAT_INC(uopcode, miss);
JUMP_TO_JUMP_TARGET();
}
STAT_INC(LOAD_ATTR, hit);
Py_INCREF(fget);
new_frame = _PyFrame_PushUnchecked(tstate, f, 1);
new_frame->localsplus[0] = owner;
stack_pointer[-1].bits = (uintptr_t)new_frame;
break;
}
/* _LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN is not a viable micro-op for tier 2 because it uses the 'this_instr' variable */

79
Python/generated_cases.c.h generated
View file

@ -4429,32 +4429,63 @@
INSTRUCTION_STATS(LOAD_ATTR_PROPERTY);
static_assert(INLINE_CACHE_ENTRIES_LOAD_ATTR == 9, "incorrect cache size");
_PyStackRef owner;
_PyInterpreterFrame *new_frame;
/* Skip 1 cache entry */
// _CHECK_PEP_523
{
DEOPT_IF(tstate->interp->eval_frame, LOAD_ATTR);
}
// _GUARD_TYPE_VERSION
owner = stack_pointer[-1];
uint32_t type_version = read_u32(&this_instr[2].cache);
uint32_t func_version = read_u32(&this_instr[4].cache);
PyObject *fget = read_obj(&this_instr[6].cache);
PyObject *owner_o = PyStackRef_AsPyObjectBorrow(owner);
assert((oparg & 1) == 0);
DEOPT_IF(tstate->interp->eval_frame, LOAD_ATTR);
PyTypeObject *cls = Py_TYPE(owner_o);
assert(type_version != 0);
DEOPT_IF(cls->tp_version_tag != type_version, LOAD_ATTR);
assert(Py_IS_TYPE(fget, &PyFunction_Type));
PyFunctionObject *f = (PyFunctionObject *)fget;
assert(func_version != 0);
DEOPT_IF(f->func_version != func_version, LOAD_ATTR);
PyCodeObject *code = (PyCodeObject *)f->func_code;
assert(code->co_argcount == 1);
DEOPT_IF(!_PyThreadState_HasStackSpace(tstate, code->co_framesize), LOAD_ATTR);
STAT_INC(LOAD_ATTR, hit);
Py_INCREF(fget);
_PyInterpreterFrame *new_frame = _PyFrame_PushUnchecked(tstate, f, 1);
// Manipulate stack directly because we exit with DISPATCH_INLINED().
STACK_SHRINK(1);
new_frame->localsplus[0] = owner;
frame->return_offset = (uint16_t)(next_instr - this_instr);
DISPATCH_INLINED(new_frame);
{
uint32_t type_version = read_u32(&this_instr[2].cache);
PyTypeObject *tp = Py_TYPE(PyStackRef_AsPyObjectBorrow(owner));
assert(type_version != 0);
DEOPT_IF(tp->tp_version_tag != type_version, LOAD_ATTR);
}
/* Skip 2 cache entries */
// _LOAD_ATTR_PROPERTY_FRAME
{
PyObject *fget = read_obj(&this_instr[6].cache);
assert((oparg & 1) == 0);
assert(Py_IS_TYPE(fget, &PyFunction_Type));
PyFunctionObject *f = (PyFunctionObject *)fget;
PyCodeObject *code = (PyCodeObject *)f->func_code;
DEOPT_IF((code->co_flags & (CO_VARKEYWORDS | CO_VARARGS | CO_OPTIMIZED)) != CO_OPTIMIZED, LOAD_ATTR);
DEOPT_IF(code->co_kwonlyargcount, LOAD_ATTR);
DEOPT_IF(code->co_argcount != 1, LOAD_ATTR);
DEOPT_IF(!_PyThreadState_HasStackSpace(tstate, code->co_framesize), LOAD_ATTR);
STAT_INC(LOAD_ATTR, hit);
Py_INCREF(fget);
new_frame = _PyFrame_PushUnchecked(tstate, f, 1);
new_frame->localsplus[0] = owner;
}
// _SAVE_RETURN_OFFSET
{
#if TIER_ONE
frame->return_offset = (uint16_t)(next_instr - this_instr);
#endif
#if TIER_TWO
frame->return_offset = oparg;
#endif
}
// _PUSH_FRAME
{
// Write it out explicitly because it's subtly different.
// Eventually this should be the only occurrence of this code.
assert(tstate->interp->eval_frame == NULL);
stack_pointer += -1;
assert(WITHIN_STACK_BOUNDS());
_PyFrame_SetStackPointer(frame, stack_pointer);
new_frame->previous = frame;
CALL_STAT_INC(inlined_py_calls);
frame = tstate->current_frame = new_frame;
tstate->py_recursion_remaining--;
LOAD_SP();
LOAD_IP(0);
LLTRACE_RESUME_FRAME();
}
DISPATCH();
}
TARGET(LOAD_ATTR_SLOT) {

5
Python/optimizer.c
View file

@ -797,7 +797,10 @@ top: // Jump here after _PUSH_FRAME or likely branches
if (uop == _PUSH_FRAME) {
assert(i + 1 == nuops);
if (opcode == FOR_ITER_GEN || opcode == SEND_GEN) {
if (opcode == FOR_ITER_GEN ||
opcode == LOAD_ATTR_PROPERTY ||
opcode == SEND_GEN)
{
DPRINTF(2, "Bailing due to dynamic target\n");
ADD_TO_TRACE(uop, oparg, 0, target);
ADD_TO_TRACE(_DYNAMIC_EXIT, 0, 0, 0);

7
Python/optimizer_cases.c.h generated
View file

@ -1160,7 +1160,12 @@
break;
}
/* _LOAD_ATTR_PROPERTY is not a viable micro-op for tier 2 */
case _LOAD_ATTR_PROPERTY_FRAME: {
_PyInterpreterFrame *new_frame;
new_frame = sym_new_not_null(ctx);
stack_pointer[-1] = (_Py_UopsSymbol *)new_frame;
break;
}
/* _LOAD_ATTR_GETATTRIBUTE_OVERRIDDEN is not a viable micro-op for tier 2 */

5
Python/specialize.c
View file

@ -963,15 +963,10 @@ _Py_Specialize_LoadAttr(_PyStackRef owner_st, _Py_CODEUNIT *instr, PyObject *nam
SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_ATTR_METHOD);
goto fail;
}
uint32_t version = function_get_version(fget, LOAD_ATTR);
if (version == 0) {
goto fail;
}
if (_PyInterpreterState_GET()->eval_frame) {
SPECIALIZATION_FAIL(LOAD_ATTR, SPEC_FAIL_OTHER);
goto fail;
}
write_u32(lm_cache->keys_version, version);
assert(type->tp_version_tag != 0);
write_u32(lm_cache->type_version, type->tp_version_tag);
/* borrowed */