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gh-148211: refactor bool to explicit uops in JIT by NekoAsakura · Pull Request #148258 · python/cpython · GitHub

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gh-148211: refactor bool to explicit uops in JIT #148258

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Fidget-Spinner merged 1 commit into from
Apr 9, 2026
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gh-148211: refactor bool to explicit uops in JIT #148258

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43 changes: 16 additions & 27 deletions Python/optimizer_analysis.c
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Original file line number Diff line number Diff line change
Expand Up @@ -155,7 +155,8 @@ type_watcher_callback(PyTypeObject* type)
}

static PyObject *
convert_global_to_const(_PyUOpInstruction *inst, PyObject *obj, bool insert)
convert_global_to_const(_PyUOpInstruction *inst, PyObject *obj,
uint16_t immortal_op, uint16_t mortal_op)
{
assert(inst->opcode == _LOAD_GLOBAL_MODULE || inst->opcode == _LOAD_GLOBAL_BUILTINS || inst->opcode == _LOAD_ATTR_MODULE);
assert(PyDict_CheckExact(obj));
Expand All @@ -175,18 +176,12 @@ convert_global_to_const(_PyUOpInstruction *inst, PyObject *obj, bool insert)
if (res == NULL) {
return NULL;
}
if (insert) {
if (_Py_IsImmortal(res)) {
inst->opcode = _INSERT_1_LOAD_CONST_INLINE_BORROW;
} else {
inst->opcode = _INSERT_1_LOAD_CONST_INLINE;
}
if (_Py_IsImmortal(res)) {
inst->opcode = immortal_op;
} else {
if (_Py_IsImmortal(res)) {
inst->opcode = _LOAD_CONST_INLINE_BORROW;
} else {
inst->opcode = _LOAD_CONST_INLINE;
}
inst->opcode = mortal_op;
}
if (inst->opcode == _LOAD_CONST_INLINE_BORROW || inst->opcode == _LOAD_CONST_INLINE) {
if (inst->oparg & 1) {
assert(inst[1].opcode == _PUSH_NULL_CONDITIONAL);
assert(inst[1].oparg & 1);
Expand Down Expand Up @@ -330,7 +325,7 @@ optimize_to_bool(
JitOptContext *ctx,
JitOptRef value,
JitOptRef *result_ptr,
bool insert_mode)
uint16_t prefix, uint16_t load_op)
{
if (sym_matches_type(value, &PyBool_Type)) {
ADD_OP(_NOP, 0, 0);
Expand All @@ -340,12 +335,10 @@ optimize_to_bool(
int truthiness = sym_truthiness(ctx, value);
if (truthiness >= 0) {
PyObject *load = truthiness ? Py_True : Py_False;
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);
if (prefix != _NOP) {
ADD_OP(prefix, 0, 0);
}
ADD_OP(load_op, 0, (uintptr_t)load);
*result_ptr = sym_new_const(ctx, load);
return 1;
}
Expand Down Expand Up @@ -391,22 +384,18 @@ 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, bool pop)
PyTypeObject *type, PyObject *name,
uint16_t prefix, uint16_t immortal_op, uint16_t mortal_op)
{
// 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) {
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);
if (prefix != _NOP) {
ADD_OP(prefix, 0, 0);
}
ADD_OP(immortal ? immortal_op : mortal_op, 0, (uintptr_t)lookup);
PyType_Watch(TYPE_WATCHER_ID, (PyObject *)type);
_Py_BloomFilter_Add(dependencies, type);
return sym_new_const(ctx, lookup);
Expand Down
39 changes: 24 additions & 15 deletions Python/optimizer_bytecodes.c
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Expand Up @@ -536,21 +536,24 @@ dummy_func(void) {
}

op(_TO_BOOL, (value -- res)) {
int already_bool = optimize_to_bool(this_instr, ctx, value, &res, false);
int already_bool = optimize_to_bool(this_instr, ctx, value, &res,
_POP_TOP, _LOAD_CONST_INLINE_BORROW);
if (!already_bool) {
res = sym_new_truthiness(ctx, value, true);
}
}

op(_TO_BOOL_BOOL, (value -- value)) {
int already_bool = optimize_to_bool(this_instr, ctx, value, &value, false);
int already_bool = optimize_to_bool(this_instr, ctx, value, &value,
_POP_TOP, _LOAD_CONST_INLINE_BORROW);
if (!already_bool) {
sym_set_type(value, &PyBool_Type);
}
}

op(_TO_BOOL_INT, (value -- res, v)) {
int already_bool = optimize_to_bool(this_instr, ctx, value, &res, true);
int already_bool = optimize_to_bool(this_instr, ctx, value, &res,
_NOP, _INSERT_1_LOAD_CONST_INLINE_BORROW);
if (!already_bool) {
sym_set_type(value, &PyLong_Type);
res = sym_new_truthiness(ctx, value, true);
Expand All @@ -559,15 +562,17 @@ dummy_func(void) {
}

op(_TO_BOOL_LIST, (value -- res, v)) {
int already_bool = optimize_to_bool(this_instr, ctx, value, &res, true);
int already_bool = optimize_to_bool(this_instr, ctx, value, &res,
_NOP, _INSERT_1_LOAD_CONST_INLINE_BORROW);
if (!already_bool) {
res = sym_new_type(ctx, &PyBool_Type);
}
v = value;
}

op(_TO_BOOL_NONE, (value -- res)) {
int already_bool = optimize_to_bool(this_instr, ctx, value, &res, false);
int already_bool = optimize_to_bool(this_instr, ctx, value, &res,
_POP_TOP, _LOAD_CONST_INLINE_BORROW);
if (!already_bool) {
sym_set_const(value, Py_None);
res = sym_new_const(ctx, Py_False);
Expand All @@ -593,7 +598,8 @@ dummy_func(void) {
}

op(_TO_BOOL_STR, (value -- res, v)) {
int already_bool = optimize_to_bool(this_instr, ctx, value, &res, true);
int already_bool = optimize_to_bool(this_instr, ctx, value, &res,
_NOP, _INSERT_1_LOAD_CONST_INLINE_BORROW);
v = value;
if (!already_bool) {
res = sym_new_truthiness(ctx, value, true);
Expand Down Expand Up @@ -837,7 +843,8 @@ dummy_func(void) {
if (watched_mutations < _Py_MAX_ALLOWED_GLOBALS_MODIFICATIONS) {
PyDict_Watch(GLOBALS_WATCHER_ID, dict);
_Py_BloomFilter_Add(dependencies, dict);
PyObject *res = convert_global_to_const(this_instr, dict, true);
PyObject *res = convert_global_to_const(this_instr, dict,
_INSERT_1_LOAD_CONST_INLINE_BORROW, _INSERT_1_LOAD_CONST_INLINE);
if (res == NULL) {
attr = sym_new_not_null(ctx);
}
Expand Down Expand Up @@ -890,31 +897,31 @@ dummy_func(void) {
PyTypeObject *type = (PyTypeObject *)sym_get_const(ctx, owner);
PyObject *name = get_co_name(ctx, oparg >> 1);
attr = lookup_attr(ctx, dependencies, this_instr, type, name,
true);
_POP_TOP, _LOAD_CONST_INLINE_BORROW, _LOAD_CONST_INLINE);
}

op(_LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES, (descr/4, owner -- attr)) {
(void)descr;
PyTypeObject *type = sym_get_type(owner);
PyObject *name = get_co_name(ctx, oparg >> 1);
attr = lookup_attr(ctx, dependencies, this_instr, type, name,
true);
_POP_TOP, _LOAD_CONST_INLINE_BORROW, _LOAD_CONST_INLINE);
}

op(_LOAD_ATTR_NONDESCRIPTOR_NO_DICT, (descr/4, owner -- attr)) {
(void)descr;
PyTypeObject *type = sym_get_type(owner);
PyObject *name = get_co_name(ctx, oparg >> 1);
attr = lookup_attr(ctx, dependencies, this_instr, type, name,
true);
_POP_TOP, _LOAD_CONST_INLINE_BORROW, _LOAD_CONST_INLINE);
}

op(_LOAD_ATTR_METHOD_WITH_VALUES, (descr/4, owner -- attr, self)) {
(void)descr;
PyTypeObject *type = sym_get_type(owner);
PyObject *name = get_co_name(ctx, oparg >> 1);
attr = lookup_attr(ctx, dependencies, this_instr, type, name,
false);
_NOP, _INSERT_1_LOAD_CONST_INLINE_BORROW, _INSERT_1_LOAD_CONST_INLINE);
self = owner;
}

Expand All @@ -923,7 +930,7 @@ dummy_func(void) {
PyTypeObject *type = sym_get_type(owner);
PyObject *name = get_co_name(ctx, oparg >> 1);
attr = lookup_attr(ctx, dependencies, this_instr, type, name,
false);
_NOP, _INSERT_1_LOAD_CONST_INLINE_BORROW, _INSERT_1_LOAD_CONST_INLINE);
self = owner;
}

Expand All @@ -932,7 +939,7 @@ dummy_func(void) {
PyTypeObject *type = sym_get_type(owner);
PyObject *name = get_co_name(ctx, oparg >> 1);
attr = lookup_attr(ctx, dependencies, this_instr, type, name,
false);
_NOP, _INSERT_1_LOAD_CONST_INLINE_BORROW, _INSERT_1_LOAD_CONST_INLINE);
self = owner;
}

Expand Down Expand Up @@ -2007,7 +2014,8 @@ dummy_func(void) {
ctx->builtins_watched = true;
}
if (ctx->frame->globals_checked_version != 0 && ctx->frame->globals_watched) {
cnst = convert_global_to_const(this_instr, builtins, false);
cnst = convert_global_to_const(this_instr, builtins,
_LOAD_CONST_INLINE_BORROW, _LOAD_CONST_INLINE);
}
}
if (cnst == NULL) {
Expand Down Expand Up @@ -2046,7 +2054,8 @@ dummy_func(void) {
ctx->frame->globals_checked_version = version;
}
if (ctx->frame->globals_checked_version == version) {
cnst = convert_global_to_const(this_instr, globals, false);
cnst = convert_global_to_const(this_instr, globals,
_LOAD_CONST_INLINE_BORROW, _LOAD_CONST_INLINE);
}
}
}
Expand Down
39 changes: 24 additions & 15 deletions Python/optimizer_cases.c.h
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