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gh-148211: decompose _POP_TOP_LOAD_CONST_INLINE(_BORROW) in JIT (GH-148230)

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Neko Asakura 2026-04-08 23:20:31 +08:00 • committed by GitHub
parent 461125aaa3
commit d2fa4b2b13
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5 changed files with 62 additions and 71 deletions
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33
Python/optimizer_analysis.c
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@ -155,7 +155,7 @@ type_watcher_callback(PyTypeObject* type)
}
static PyObject *
convert_global_to_const(_PyUOpInstruction *inst, PyObject *obj, bool pop, bool insert)
convert_global_to_const(_PyUOpInstruction *inst, PyObject *obj, bool insert)
{
assert(inst->opcode == _LOAD_GLOBAL_MODULE || inst->opcode == _LOAD_GLOBAL_BUILTINS || inst->opcode == _LOAD_ATTR_MODULE);
assert(PyDict_CheckExact(obj));
@ -183,9 +183,9 @@ convert_global_to_const(_PyUOpInstruction *inst, PyObject *obj, bool pop, bool i
}
} else {
if (_Py_IsImmortal(res)) {
inst->opcode = pop ? _POP_TOP_LOAD_CONST_INLINE_BORROW : _LOAD_CONST_INLINE_BORROW;
inst->opcode = _LOAD_CONST_INLINE_BORROW;
} else {
inst->opcode = pop ? _POP_TOP_LOAD_CONST_INLINE : _LOAD_CONST_INLINE;
inst->opcode = _LOAD_CONST_INLINE;
}
if (inst->oparg & 1) {
assert(inst[1].opcode == _PUSH_NULL_CONDITIONAL);
@ -340,10 +340,12 @@ optimize_to_bool(
int truthiness = sym_truthiness(ctx, value);
if (truthiness >= 0) {
PyObject *load = truthiness ? Py_True : Py_False;
int opcode = insert_mode ?
_INSERT_1_LOAD_CONST_INLINE_BORROW :
_POP_TOP_LOAD_CONST_INLINE_BORROW;
ADD_OP(opcode, 0, (uintptr_t)load);
if (insert_mode) {
ADD_OP(_INSERT_1_LOAD_CONST_INLINE_BORROW, 0, (uintptr_t)load);
} else {
ADD_OP(_POP_TOP, 0, 0);
ADD_OP(_LOAD_CONST_INLINE_BORROW, 0, (uintptr_t)load);
}
*result_ptr = sym_new_const(ctx, load);
return 1;
}
@ -389,19 +391,22 @@ eliminate_pop_guard(_PyUOpInstruction *this_instr, JitOptContext *ctx, bool exit
static JitOptRef
lookup_attr(JitOptContext *ctx, _PyBloomFilter *dependencies, _PyUOpInstruction *this_instr,
PyTypeObject *type, PyObject *name, uint16_t immortal,
uint16_t mortal)
PyTypeObject *type, PyObject *name, bool pop)
{
// The cached value may be dead, so we need to do the lookup again... :(
if (type && PyType_Check(type)) {
PyObject *lookup = _PyType_Lookup(type, name);
if (lookup) {
int opcode = mortal;
// if the object is immortal or the type is immutable, borrowing is safe
if (_Py_IsImmortal(lookup) || (type->tp_flags & Py_TPFLAGS_IMMUTABLETYPE)) {
opcode = immortal;
bool immortal = _Py_IsImmortal(lookup) || (type->tp_flags & Py_TPFLAGS_IMMUTABLETYPE);
if (pop) {
ADD_OP(_POP_TOP, 0, 0);
ADD_OP(immortal ? _LOAD_CONST_INLINE_BORROW : _LOAD_CONST_INLINE,
0, (uintptr_t)lookup);
}
else {
ADD_OP(immortal ? _INSERT_1_LOAD_CONST_INLINE_BORROW : _INSERT_1_LOAD_CONST_INLINE,
0, (uintptr_t)lookup);
}
ADD_OP(opcode, 0, (uintptr_t)lookup);
PyType_Watch(TYPE_WATCHER_ID, (PyObject *)type);
_Py_BloomFilter_Add(dependencies, type);
return sym_new_const(ctx, lookup);