cpython/Python/optimizer_bytecodes.c at zoneinfo_codeowners · pganssle/cpython · GitHub

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#include "Python.h"

#include "pycore_optimizer.h"

#include "pycore_uops.h"

#include "pycore_uop_ids.h"

#include "internal/pycore_moduleobject.h"

#define op(name, ...) /* NAME is ignored */

typedef struct _Py_UOpsAbstractFrame _Py_UOpsAbstractFrame;

/* Shortened forms for convenience */

#define sym_is_not_null _Py_uop_sym_is_not_null

#define sym_is_const _Py_uop_sym_is_const

#define sym_get_const _Py_uop_sym_get_const

#define sym_new_unknown _Py_uop_sym_new_unknown

#define sym_new_not_null _Py_uop_sym_new_not_null

#define sym_new_type _Py_uop_sym_new_type

#define sym_is_null _Py_uop_sym_is_null

#define sym_new_const _Py_uop_sym_new_const

#define sym_new_null _Py_uop_sym_new_null

#define sym_matches_type _Py_uop_sym_matches_type

#define sym_matches_type_version _Py_uop_sym_matches_type_version

#define sym_get_type _Py_uop_sym_get_type

#define sym_has_type _Py_uop_sym_has_type

#define sym_set_null(SYM) _Py_uop_sym_set_null(ctx, SYM)

#define sym_set_non_null(SYM) _Py_uop_sym_set_non_null(ctx, SYM)

#define sym_set_type(SYM, TYPE) _Py_uop_sym_set_type(ctx, SYM, TYPE)

#define sym_set_type_version(SYM, VERSION) _Py_uop_sym_set_type_version(ctx, SYM, VERSION)

#define sym_set_const(SYM, CNST) _Py_uop_sym_set_const(ctx, SYM, CNST)

#define sym_set_compact_int(SYM) _Py_uop_sym_set_compact_int(ctx, SYM)

#define sym_is_bottom _Py_uop_sym_is_bottom

#define frame_new _Py_uop_frame_new

#define frame_pop _Py_uop_frame_pop

#define sym_new_tuple _Py_uop_sym_new_tuple

#define sym_tuple_getitem _Py_uop_sym_tuple_getitem

#define sym_tuple_length _Py_uop_sym_tuple_length

#define sym_is_immortal _Py_uop_symbol_is_immortal

#define sym_new_compact_int _Py_uop_sym_new_compact_int

#define sym_is_compact_int _Py_uop_sym_is_compact_int

#define sym_new_truthiness _Py_uop_sym_new_truthiness

extern int

optimize_to_bool(

_PyUOpInstruction *this_instr,

JitOptContext *ctx,

JitOptSymbol *value,

JitOptSymbol **result_ptr);

extern void

eliminate_pop_guard(_PyUOpInstruction *this_instr, bool exit);

extern PyCodeObject *get_code(_PyUOpInstruction *op);

static int

dummy_func(void) {

PyCodeObject *co;

int oparg;

JitOptSymbol *flag;

JitOptSymbol *left;

JitOptSymbol *right;

JitOptSymbol *value;

JitOptSymbol *res;

JitOptSymbol *iter;

JitOptSymbol *top;

JitOptSymbol *bottom;

_Py_UOpsAbstractFrame *frame;

_Py_UOpsAbstractFrame *new_frame;

JitOptContext *ctx;

_PyUOpInstruction *this_instr;

_PyBloomFilter *dependencies;

int modified;

int curr_space;

int max_space;

_PyUOpInstruction *first_valid_check_stack;

_PyUOpInstruction *corresponding_check_stack;

// BEGIN BYTECODES //

op(_LOAD_FAST_CHECK, (-- value)) {

value = GETLOCAL(oparg);

// We guarantee this will error - just bail and don't optimize it.

if (sym_is_null(value)) {

ctx->done = true;

}

op(_LOAD_FAST, (-- value)) {

value = GETLOCAL(oparg);

}

op(_LOAD_FAST_BORROW, (-- value)) {

value = PyJitRef_Borrow(GETLOCAL(oparg));

}

op(_LOAD_FAST_AND_CLEAR, (-- value)) {

value = GETLOCAL(oparg);

JitOptRef temp = sym_new_null(ctx);

GETLOCAL(oparg) = temp;

}

op(_STORE_FAST, (value --)) {

GETLOCAL(oparg) = value;

}

op(_PUSH_NULL, (-- res)) {

res = sym_new_null(ctx);

}

op(_GUARD_TOS_INT, (value -- value)) {

if (sym_is_compact_int(value)) {

REPLACE_OP(this_instr, _NOP, 0, 0);

}

else {

if (sym_get_type(value) == &PyLong_Type) {

REPLACE_OP(this_instr, _GUARD_TOS_OVERFLOWED, 0, 0);

}

sym_set_compact_int(value);

}

op(_GUARD_NOS_INT, (left, unused -- left, unused)) {

if (sym_is_compact_int(left)) {

REPLACE_OP(this_instr, _NOP, 0, 0);

}

else {

if (sym_get_type(left) == &PyLong_Type) {

REPLACE_OP(this_instr, _GUARD_NOS_OVERFLOWED, 0, 0);

}

sym_set_compact_int(left);

}

op(_CHECK_ATTR_CLASS, (type_version/2, owner -- owner)) {

PyObject *type = (PyObject *)_PyType_LookupByVersion(type_version);

if (type) {

if (type == sym_get_const(ctx, owner)) {

REPLACE_OP(this_instr, _NOP, 0, 0);

}

else {

sym_set_const(owner, type);

}

op(_GUARD_TYPE_VERSION, (type_version/2, owner -- owner)) {

assert(type_version);

if (sym_matches_type_version(owner, type_version)) {

REPLACE_OP(this_instr, _NOP, 0, 0);

} else {

// add watcher so that whenever the type changes we invalidate this

PyTypeObject *type = _PyType_LookupByVersion(type_version);

// if the type is null, it was not found in the cache (there was a conflict)

// with the key, in which case we can't trust the version

if (type) {

// if the type version was set properly, then add a watcher

// if it wasn't this means that the type version was previously set to something else

// and we set the owner to bottom, so we don't need to add a watcher because we must have

// already added one earlier.

if (sym_set_type_version(owner, type_version)) {

PyType_Watch(TYPE_WATCHER_ID, (PyObject *)type);

_Py_BloomFilter_Add(dependencies, type);

}

op(_GUARD_TOS_FLOAT, (value -- value)) {

if (sym_matches_type(value, &PyFloat_Type)) {

REPLACE_OP(this_instr, _NOP, 0, 0);

}

sym_set_type(value, &PyFloat_Type);

}

op(_GUARD_NOS_FLOAT, (left, unused -- left, unused)) {

if (sym_matches_type(left, &PyFloat_Type)) {

REPLACE_OP(this_instr, _NOP, 0, 0);

}

sym_set_type(left, &PyFloat_Type);

}

op(_BINARY_OP, (lhs, rhs -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(lhs, rhs);

bool lhs_int = sym_matches_type(lhs, &PyLong_Type);

bool rhs_int = sym_matches_type(rhs, &PyLong_Type);

bool lhs_float = sym_matches_type(lhs, &PyFloat_Type);

bool rhs_float = sym_matches_type(rhs, &PyFloat_Type);

if (!((lhs_int || lhs_float) && (rhs_int || rhs_float))) {

// There's something other than an int or float involved:

res = sym_new_unknown(ctx);

}

else if (oparg == NB_POWER || oparg == NB_INPLACE_POWER) {

// This one's fun... the *type* of the result depends on the

// *values* being exponentiated. However, exponents with one

// constant part are reasonably common, so it's probably worth

// trying to infer some simple cases:

// - A: 1 ** 1 -> 1 (int ** int -> int)

// - B: 1 ** -1 -> 1.0 (int ** int -> float)

// - C: 1.0 ** 1 -> 1.0 (float ** int -> float)

// - D: 1 ** 1.0 -> 1.0 (int ** float -> float)

// - E: -1 ** 0.5 ~> 1j (int ** float -> complex)

// - F: 1.0 ** 1.0 -> 1.0 (float ** float -> float)

// - G: -1.0 ** 0.5 ~> 1j (float ** float -> complex)

if (rhs_float) {

// Case D, E, F, or G... can't know without the sign of the LHS

// or whether the RHS is whole, which isn't worth the effort:

res = sym_new_unknown(ctx);

}

else if (lhs_float) {

// Case C:

res = sym_new_type(ctx, &PyFloat_Type);

}

else if (!sym_is_const(ctx, rhs)) {

// Case A or B... can't know without the sign of the RHS:

res = sym_new_unknown(ctx);

}

else if (_PyLong_IsNegative((PyLongObject *)sym_get_const(ctx, rhs))) {

// Case B:

res = sym_new_type(ctx, &PyFloat_Type);

}

else {

// Case A:

res = sym_new_type(ctx, &PyLong_Type);

}

else if (oparg == NB_TRUE_DIVIDE || oparg == NB_INPLACE_TRUE_DIVIDE) {

res = sym_new_type(ctx, &PyFloat_Type);

}

else if (lhs_int && rhs_int) {

res = sym_new_type(ctx, &PyLong_Type);

}

else {

res = sym_new_type(ctx, &PyFloat_Type);

}

op(_BINARY_OP_ADD_INT, (left, right -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

res = sym_new_compact_int(ctx);

}

op(_BINARY_OP_SUBTRACT_INT, (left, right -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

res = sym_new_compact_int(ctx);

}

op(_BINARY_OP_MULTIPLY_INT, (left, right -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

res = sym_new_compact_int(ctx);

}

op(_BINARY_OP_ADD_FLOAT, (left, right -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

res = sym_new_type(ctx, &PyFloat_Type);

// TODO (gh-134584): Refactor this to use another uop

if (PyJitRef_IsBorrowed(left) && PyJitRef_IsBorrowed(right)) {

REPLACE_OP(this_instr, op_without_decref_inputs[opcode], oparg, 0);

}

op(_BINARY_OP_SUBTRACT_FLOAT, (left, right -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

res = sym_new_type(ctx, &PyFloat_Type);

// TODO (gh-134584): Refactor this to use another uop

if (PyJitRef_IsBorrowed(left) && PyJitRef_IsBorrowed(right)) {

REPLACE_OP(this_instr, op_without_decref_inputs[opcode], oparg, 0);

}

op(_BINARY_OP_MULTIPLY_FLOAT, (left, right -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

res = sym_new_type(ctx, &PyFloat_Type);

// TODO (gh-134584): Refactor this to use another uop

if (PyJitRef_IsBorrowed(left) && PyJitRef_IsBorrowed(right)) {

REPLACE_OP(this_instr, op_without_decref_inputs[opcode], oparg, 0);

}

op(_BINARY_OP_ADD_UNICODE, (left, right -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

res = sym_new_type(ctx, &PyUnicode_Type);

}

op(_BINARY_OP_INPLACE_ADD_UNICODE, (left, right -- )) {

JitOptRef res;

if (sym_is_const(ctx, left) && sym_is_const(ctx, right)) {

assert(PyUnicode_CheckExact(sym_get_const(ctx, left)));

assert(PyUnicode_CheckExact(sym_get_const(ctx, right)));

PyObject *temp = PyUnicode_Concat(sym_get_const(ctx, left), sym_get_const(ctx, right));

if (temp == NULL) {

goto error;

}

res = sym_new_const(ctx, temp);

Py_DECREF(temp);

}

else {

res = sym_new_type(ctx, &PyUnicode_Type);

}

// _STORE_FAST:

GETLOCAL(this_instr->operand0) = res;

}

op(_BINARY_OP_SUBSCR_INIT_CALL, (container, sub, getitem -- new_frame)) {

new_frame = PyJitRef_NULL;

ctx->done = true;

}

op(_BINARY_OP_SUBSCR_STR_INT, (str_st, sub_st -- res)) {

res = sym_new_type(ctx, &PyUnicode_Type);

}

op(_BINARY_OP_SUBSCR_TUPLE_INT, (tuple_st, sub_st -- res)) {

assert(sym_matches_type(tuple_st, &PyTuple_Type));

if (sym_is_const(ctx, sub_st)) {

assert(PyLong_CheckExact(sym_get_const(ctx, sub_st)));

long index = PyLong_AsLong(sym_get_const(ctx, sub_st));

assert(index >= 0);

Py_ssize_t tuple_length = sym_tuple_length(tuple_st);

if (tuple_length == -1) {

// Unknown length

res = sym_new_not_null(ctx);

}

else {

assert(index < tuple_length);

res = sym_tuple_getitem(ctx, tuple_st, index);

}

else {

res = sym_new_not_null(ctx);

}

op(_TO_BOOL, (value -- res)) {

int already_bool = optimize_to_bool(this_instr, ctx, value, &res);

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);

if (!already_bool) {

sym_set_type(value, &PyBool_Type);

value = sym_new_truthiness(ctx, value, true);

}

op(_TO_BOOL_INT, (value -- res)) {

int already_bool = optimize_to_bool(this_instr, ctx, value, &res);

if (!already_bool) {

sym_set_type(value, &PyLong_Type);

res = sym_new_truthiness(ctx, value, true);

}

op(_TO_BOOL_LIST, (value -- res)) {

int already_bool = optimize_to_bool(this_instr, ctx, value, &res);

if (!already_bool) {

res = sym_new_type(ctx, &PyBool_Type);

}

op(_TO_BOOL_NONE, (value -- res)) {

int already_bool = optimize_to_bool(this_instr, ctx, value, &res);

if (!already_bool) {

sym_set_const(value, Py_None);

res = sym_new_const(ctx, Py_False);

}

op(_GUARD_NOS_UNICODE, (nos, unused -- nos, unused)) {

if (sym_matches_type(nos, &PyUnicode_Type)) {

REPLACE_OP(this_instr, _NOP, 0, 0);

}

sym_set_type(nos, &PyUnicode_Type);

}

op(_GUARD_TOS_UNICODE, (value -- value)) {

if (sym_matches_type(value, &PyUnicode_Type)) {

REPLACE_OP(this_instr, _NOP, 0, 0);

}

sym_set_type(value, &PyUnicode_Type);

}

op(_TO_BOOL_STR, (value -- res)) {

int already_bool = optimize_to_bool(this_instr, ctx, value, &res);

if (!already_bool) {

res = sym_new_truthiness(ctx, value, true);

}

op(_UNARY_NOT, (value -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(value);

sym_set_type(value, &PyBool_Type);

res = sym_new_truthiness(ctx, value, false);

}

op(_UNARY_NEGATIVE, (value -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(value);

if (sym_is_compact_int(value)) {

res = sym_new_compact_int(ctx);

}

else {

PyTypeObject *type = sym_get_type(value);

if (type == &PyLong_Type || type == &PyFloat_Type) {

res = sym_new_type(ctx, type);

}

else {

res = sym_new_not_null(ctx);

}

op(_UNARY_INVERT, (value -- res)) {

// Required to avoid a warning due to the deprecation of bitwise inversion of bools

if (!sym_matches_type(value, &PyBool_Type)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(value);

}

if (sym_matches_type(value, &PyLong_Type)) {

res = sym_new_type(ctx, &PyLong_Type);

}

else {

res = sym_new_not_null(ctx);

}

op(_COMPARE_OP, (left, right -- res)) {

// Comparison between bytes and str or int is not impacted by this optimization as bytes

// is not a safe type (due to its ability to raise a warning during comparisons).

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

if (oparg & 16) {

res = sym_new_type(ctx, &PyBool_Type);

}

else {

res = _Py_uop_sym_new_not_null(ctx);

}

op(_COMPARE_OP_INT, (left, right -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

res = sym_new_type(ctx, &PyBool_Type);

}

op(_COMPARE_OP_FLOAT, (left, right -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

res = sym_new_type(ctx, &PyBool_Type);

}

op(_COMPARE_OP_STR, (left, right -- res)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

res = sym_new_type(ctx, &PyBool_Type);

}

op(_IS_OP, (left, right -- b)) {

b = sym_new_type(ctx, &PyBool_Type);

}

op(_CONTAINS_OP, (left, right -- b)) {

REPLACE_OPCODE_IF_EVALUATES_PURE(left, right);

b = sym_new_type(ctx, &PyBool_Type);

}

op(_CONTAINS_OP_SET, (left, right -- b)) {

b = sym_new_type(ctx, &PyBool_Type);

}

op(_CONTAINS_OP_DICT, (left, right -- b)) {

b = sym_new_type(ctx, &PyBool_Type);

}

op(_LOAD_CONST, (-- value)) {

PyObject *val = PyTuple_GET_ITEM(co->co_consts, oparg);

REPLACE_OP(this_instr, _LOAD_CONST_INLINE_BORROW, 0, (uintptr_t)val);

value = PyJitRef_Borrow(sym_new_const(ctx, val));

}

op(_LOAD_SMALL_INT, (-- value)) {

PyObject *val = PyLong_FromLong(oparg);

assert(val);

assert(_Py_IsImmortal(val));

REPLACE_OP(this_instr, _LOAD_CONST_INLINE_BORROW, 0, (uintptr_t)val);

value = PyJitRef_Borrow(sym_new_const(ctx, val));

}

op(_LOAD_CONST_INLINE, (ptr/4 -- value)) {

value = sym_new_const(ctx, ptr);

}

op(_LOAD_CONST_INLINE_BORROW, (ptr/4 -- value)) {

value = PyJitRef_Borrow(sym_new_const(ctx, ptr));

}

op(_POP_TOP_LOAD_CONST_INLINE, (ptr/4, pop -- value)) {

value = sym_new_const(ctx, ptr);

}

op(_POP_TOP_LOAD_CONST_INLINE_BORROW, (ptr/4, pop -- value)) {

value = PyJitRef_Borrow(sym_new_const(ctx, ptr));

}

op(_POP_CALL_LOAD_CONST_INLINE_BORROW, (ptr/4, unused, unused -- value)) {

value = PyJitRef_Borrow(sym_new_const(ctx, ptr));

}

op(_POP_CALL_ONE_LOAD_CONST_INLINE_BORROW, (ptr/4, unused, unused, unused -- value)) {

value = PyJitRef_Borrow(sym_new_const(ctx, ptr));

}

op(_POP_CALL_TWO_LOAD_CONST_INLINE_BORROW, (ptr/4, unused, unused, unused, unused -- value)) {

value = PyJitRef_Borrow(sym_new_const(ctx, ptr));

}

op(_POP_TOP, (value -- )) {

PyTypeObject *typ = sym_get_type(value);

if (PyJitRef_IsBorrowed(value) ||

sym_is_immortal(PyJitRef_Unwrap(value)) ||

sym_is_null(value)) {

REPLACE_OP(this_instr, _POP_TOP_NOP, 0, 0);

}

else if (typ == &PyLong_Type) {

REPLACE_OP(this_instr, _POP_TOP_INT, 0, 0);

}

else if (typ == &PyFloat_Type) {

REPLACE_OP(this_instr, _POP_TOP_FLOAT, 0, 0);

}

else if (typ == &PyUnicode_Type) {

REPLACE_OP(this_instr, _POP_TOP_UNICODE, 0, 0);

}

op(_COPY, (bottom, unused[oparg-1] -- bottom, unused[oparg-1], top)) {

assert(oparg > 0);

top = bottom;

}

op(_SWAP, (bottom, unused[oparg-2], top -- bottom, unused[oparg-2], top)) {

JitOptRef temp = bottom;

bottom = top;

top = temp;

assert(oparg >= 2);

}

op(_LOAD_ATTR_INSTANCE_VALUE, (offset/1, owner -- attr)) {

attr = sym_new_not_null(ctx);

(void)offset;

}

op(_LOAD_ATTR_MODULE, (dict_version/2, index/1, owner -- attr)) {

(void)dict_version;

(void)index;

attr = PyJitRef_NULL;

if (sym_is_const(ctx, owner)) {

PyModuleObject *mod = (PyModuleObject *)sym_get_const(ctx, owner);

if (PyModule_CheckExact(mod)) {

PyObject *dict = mod->md_dict;

uint64_t watched_mutations = get_mutations(dict);

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);

if (res == NULL) {

attr = sym_new_not_null(ctx);

}

else {

attr = sym_new_const(ctx, res);

}

if (PyJitRef_IsNull(attr)) {

/* No conversion made. We don't know what `attr` is. */

attr = sym_new_not_null(ctx);

}

op (_PUSH_NULL_CONDITIONAL, ( -- null[oparg & 1])) {

if (oparg & 1) {

REPLACE_OP(this_instr, _PUSH_NULL, 0, 0);

null[0] = sym_new_null(ctx);

}

else {

REPLACE_OP(this_instr, _NOP, 0, 0);

}

op(_LOAD_ATTR, (owner -- attr[1], self_or_null[oparg&1])) {

(void)owner;

*attr = sym_new_not_null(ctx);

if (oparg & 1) {

self_or_null[0] = sym_new_unknown(ctx);

}

op(_LOAD_ATTR_WITH_HINT, (hint/1, owner -- attr)) {

attr = sym_new_not_null(ctx);

(void)hint;

}

op(_LOAD_ATTR_SLOT, (index/1, owner -- attr)) {

attr = sym_new_not_null(ctx);

(void)index;

}

op(_LOAD_ATTR_CLASS, (descr/4, owner -- attr)) {

(void)descr;

PyTypeObject *type = (PyTypeObject *)sym_get_const(ctx, owner);

PyObject *name = PyTuple_GET_ITEM(co->co_names, oparg >> 1);

attr = lookup_attr(ctx, this_instr, type, name,

_POP_TOP_LOAD_CONST_INLINE_BORROW,

_POP_TOP_LOAD_CONST_INLINE);

}

op(_LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES, (descr/4, owner -- attr)) {

(void)descr;

PyTypeObject *type = sym_get_type(owner);

PyObject *name = PyTuple_GET_ITEM(co->co_names, oparg >> 1);

attr = lookup_attr(ctx, this_instr, type, name,

_POP_TOP_LOAD_CONST_INLINE_BORROW,

_POP_TOP_LOAD_CONST_INLINE);

}

op(_LOAD_ATTR_NONDESCRIPTOR_NO_DICT, (descr/4, owner -- attr)) {

(void)descr;

PyTypeObject *type = sym_get_type(owner);

PyObject *name = PyTuple_GET_ITEM(co->co_names, oparg >> 1);

attr = lookup_attr(ctx, this_instr, type, name,

_POP_TOP_LOAD_CONST_INLINE_BORROW,

_POP_TOP_LOAD_CONST_INLINE);

}

op(_LOAD_ATTR_METHOD_WITH_VALUES, (descr/4, owner -- attr, self)) {

(void)descr;

PyTypeObject *type = sym_get_type(owner);

PyObject *name = PyTuple_GET_ITEM(co->co_names, oparg >> 1);

attr = lookup_attr(ctx, this_instr, type, name,

_LOAD_CONST_UNDER_INLINE_BORROW,

_LOAD_CONST_UNDER_INLINE);

self = owner;

}

op(_LOAD_ATTR_METHOD_NO_DICT, (descr/4, owner -- attr, self)) {

(void)descr;

PyTypeObject *type = sym_get_type(owner);

PyObject *name = PyTuple_GET_ITEM(co->co_names, oparg >> 1);

attr = lookup_attr(ctx, this_instr, type, name,

_LOAD_CONST_UNDER_INLINE_BORROW,

_LOAD_CONST_UNDER_INLINE);

self = owner;

}

op(_LOAD_ATTR_METHOD_LAZY_DICT, (descr/4, owner -- attr, self)) {

(void)descr;

PyTypeObject *type = sym_get_type(owner);

PyObject *name = PyTuple_GET_ITEM(co->co_names, oparg >> 1);

attr = lookup_attr(ctx, this_instr, type, name,

_LOAD_CONST_UNDER_INLINE_BORROW,

_LOAD_CONST_UNDER_INLINE);

self = owner;

}

op(_LOAD_ATTR_PROPERTY_FRAME, (fget/4, owner -- new_frame)) {

(void)fget;

new_frame = PyJitRef_NULL;

ctx->done = true;

}

op(_INIT_CALL_BOUND_METHOD_EXACT_ARGS, (callable, self_or_null, unused[oparg] -- callable, self_or_null, unused[oparg])) {

callable = sym_new_not_null(ctx);

self_or_null = sym_new_not_null(ctx);

}

op(_CHECK_FUNCTION_VERSION, (func_version/2, callable, self_or_null, unused[oparg] -- callable, self_or_null, unused[oparg])) {

if (sym_is_const(ctx, callable) && sym_matches_type(callable, &PyFunction_Type)) {

assert(PyFunction_Check(sym_get_const(ctx, callable)));

REPLACE_OP(this_instr, _CHECK_FUNCTION_VERSION_INLINE, 0, func_version);

this_instr->operand1 = (uintptr_t)sym_get_const(ctx, callable);

}

sym_set_type(callable, &PyFunction_Type);

}

op(_CHECK_METHOD_VERSION, (func_version/2, callable, null, unused[oparg] -- callable, null, unused[oparg])) {

if (sym_is_const(ctx, callable) && sym_matches_type(callable, &PyMethod_Type)) {

PyMethodObject *method = (PyMethodObject *)sym_get_const(ctx, callable);

assert(PyMethod_Check(method));

REPLACE_OP(this_instr, _CHECK_FUNCTION_VERSION_INLINE, 0, func_version);

this_instr->operand1 = (uintptr_t)method->im_func;

}

sym_set_type(callable, &PyMethod_Type);

}

op(_CHECK_FUNCTION_EXACT_ARGS, (callable, self_or_null, unused[oparg] -- callable, self_or_null, unused[oparg])) {

assert(sym_matches_type(callable, &PyFunction_Type));

if (sym_is_const(ctx, callable)) {

if (sym_is_null(self_or_null) || sym_is_not_null(self_or_null)) {

PyFunctionObject *func = (PyFunctionObject *)sym_get_const(ctx, callable);

PyCodeObject *co = (PyCodeObject *)func->func_code;

if (co->co_argcount == oparg + !sym_is_null(self_or_null)) {

REPLACE_OP(this_instr, _NOP, 0 ,0);

}

op(_CHECK_CALL_BOUND_METHOD_EXACT_ARGS, (callable, null, unused[oparg] -- callable, null, unused[oparg])) {

sym_set_null(null);

sym_set_type(callable, &PyMethod_Type);

}

op(_INIT_CALL_PY_EXACT_ARGS, (callable, self_or_null, args[oparg] -- new_frame)) {

int argcount = oparg;

PyCodeObject *co = NULL;

assert((this_instr + 2)->opcode == _PUSH_FRAME);

co = get_code_with_logging((this_instr + 2));

if (co == NULL) {

ctx->done = true;

break;

}

assert(!PyJitRef_IsNull(self_or_null));

assert(args != NULL);

if (sym_is_not_null(self_or_null)) {

// Bound method fiddling, same as _INIT_CALL_PY_EXACT_ARGS in VM

args--;

argcount++;

}

if (sym_is_null(self_or_null) || sym_is_not_null(self_or_null)) {

new_frame = PyJitRef_Wrap((JitOptSymbol *)frame_new(ctx, co, 0, args, argcount));

} else {

new_frame = PyJitRef_Wrap((JitOptSymbol *)frame_new(ctx, co, 0, NULL, 0));

}

op(_MAYBE_EXPAND_METHOD, (callable, self_or_null, args[oparg] -- callable, self_or_null, args[oparg])) {

(void)args;

callable = sym_new_not_null(ctx);

self_or_null = sym_new_not_null(ctx);

}

op(_PY_FRAME_GENERAL, (callable, self_or_null, args[oparg] -- new_frame)) {

PyCodeObject *co = NULL;

assert((this_instr + 2)->opcode == _PUSH_FRAME);

co = get_code_with_logging((this_instr + 2));

if (co == NULL) {

ctx->done = true;

break;

}

new_frame = PyJitRef_Wrap((JitOptSymbol *)frame_new(ctx, co, 0, NULL, 0));

}

op(_PY_FRAME_KW, (callable, self_or_null, args[oparg], kwnames -- new_frame)) {

new_frame = PyJitRef_NULL;

ctx->done = true;

}

op(_CHECK_AND_ALLOCATE_OBJECT, (type_version/2, callable, self_or_null, args[oparg] -- callable, self_or_null, args[oparg])) {

(void)type_version;

(void)args;

callable = sym_new_not_null(ctx);

self_or_null = sym_new_not_null(ctx);

}

op(_CREATE_INIT_FRAME, (init, self, args[oparg] -- init_frame)) {

init_frame = PyJitRef_NULL;

ctx->done = true;

}

op(_RETURN_VALUE, (retval -- res)) {

// Mimics PyStackRef_MakeHeapSafe in the interpreter.

JitOptRef temp = PyJitRef_StripReferenceInfo(retval);

DEAD(retval);

SAVE_STACK();

ctx->frame->stack_pointer = stack_pointer;

frame_pop(ctx);

stack_pointer = ctx->frame->stack_pointer;

/* Stack space handling */

assert(corresponding_check_stack == NULL);

assert(co != NULL);

int framesize = co->co_framesize;

assert(framesize > 0);

assert(framesize <= curr_space);

curr_space -= framesize;

co = get_code(this_instr);

if (co == NULL) {

// might be impossible, but bailing is still safe

ctx->done = true;

}

RELOAD_STACK();

res = temp;

}

op(_RETURN_GENERATOR, ( -- res)) {

SYNC_SP();

ctx->frame->stack_pointer = stack_pointer;

frame_pop(ctx);

stack_pointer = ctx->frame->stack_pointer;

res = sym_new_unknown(ctx);

/* Stack space handling */

assert(corresponding_check_stack == NULL);

assert(co != NULL);

int framesize = co->co_framesize;

assert(framesize > 0);

assert(framesize <= curr_space);

curr_space -= framesize;

co = get_code(this_instr);

if (co == NULL) {

// might be impossible, but bailing is still safe

ctx->done = true;

}

op(_YIELD_VALUE, (unused -- value)) {

value = sym_new_unknown(ctx);

}

op(_GET_ITER, (iterable -- iter, index_or_null)) {

if (sym_matches_type(iterable, &PyTuple_Type) || sym_matches_type(iterable, &PyList_Type)) {

iter = iterable;

index_or_null = sym_new_not_null(ctx);

}

else {

iter = sym_new_not_null(ctx);

index_or_null = sym_new_unknown(ctx);

}

op(_FOR_ITER_GEN_FRAME, (unused, unused -- unused, unused, gen_frame)) {

gen_frame = PyJitRef_NULL;

/* We are about to hit the end of the trace */

ctx->done = true;

}

op(_SEND_GEN_FRAME, (unused, unused -- unused, gen_frame)) {

gen_frame = PyJitRef_NULL;

// We are about to hit the end of the trace:

ctx->done = true;

}

op(_CHECK_STACK_SPACE, (unused, unused, unused[oparg] -- unused, unused, unused[oparg])) {

assert(corresponding_check_stack == NULL);

corresponding_check_stack = this_instr;

}

op (_CHECK_STACK_SPACE_OPERAND, (framesize/2 -- )) {

(void)framesize;

/* We should never see _CHECK_STACK_SPACE_OPERANDs.

* They are only created at the end of this pass. */

Py_UNREACHABLE();

}

op(_PUSH_FRAME, (new_frame -- )) {

SYNC_SP();

ctx->frame->stack_pointer = stack_pointer;

ctx->frame = (_Py_UOpsAbstractFrame *)PyJitRef_Unwrap(new_frame);

ctx->curr_frame_depth++;

stack_pointer = ctx->frame->stack_pointer;

co = get_code(this_instr);

if (co == NULL) {

// should be about to _EXIT_TRACE anyway

ctx->done = true;

break;

}

/* Stack space handling */

int framesize = co->co_framesize;

assert(framesize > 0);

curr_space += framesize;

if (curr_space < 0 || curr_space > INT32_MAX) {

// won't fit in signed 32-bit int

ctx->done = true;

break;

}

max_space = curr_space > max_space ? curr_space : max_space;

if (first_valid_check_stack == NULL) {

first_valid_check_stack = corresponding_check_stack;

}

else if (corresponding_check_stack) {

// delete all but the first valid _CHECK_STACK_SPACE

corresponding_check_stack->opcode = _NOP;

}

corresponding_check_stack = NULL;

}

op(_UNPACK_SEQUENCE, (seq -- values[oparg], top[0])) {

(void)top;

/* This has to be done manually */

for (int i = 0; i < oparg; i++) {

values[i] = sym_new_unknown(ctx);

}

op(_UNPACK_EX, (seq -- values[oparg & 0xFF], unused, unused[oparg >> 8], top[0])) {

(void)top;

/* This has to be done manually */

int totalargs = (oparg & 0xFF) + (oparg >> 8) + 1;

for (int i = 0; i < totalargs; i++) {

values[i] = sym_new_unknown(ctx);

}

op(_ITER_CHECK_TUPLE, (iter, null_or_index -- iter, null_or_index)) {

if (sym_matches_type(iter, &PyTuple_Type)) {

REPLACE_OP(this_instr, _NOP, 0, 0);

}

sym_set_type(iter, &PyTuple_Type);

}

op(_ITER_NEXT_RANGE, (iter, null_or_index -- iter, null_or_index, next)) {

next = sym_new_type(ctx, &PyLong_Type);

}

op(_CALL_TYPE_1, (unused, unused, arg -- res)) {

PyObject* type = (PyObject *)sym_get_type(arg);

if (type) {

res = sym_new_const(ctx, type);

REPLACE_OP(this_instr, _POP_CALL_ONE_LOAD_CONST_INLINE_BORROW, 0,

(uintptr_t)type);

}

else {

res = sym_new_not_null(ctx);

}

op(_CALL_STR_1, (unused, unused, arg -- res)) {

if (sym_matches_type(arg, &PyUnicode_Type)) {

// e.g. str('foo') or str(foo) where foo is known to be a string

// Note: we must strip the reference information because it goes

// through str() which strips the reference information from it.

res = PyJitRef_StripReferenceInfo(arg);

}

else {

res = sym_new_type(ctx, &PyUnicode_Type);

}

op(_CALL_ISINSTANCE, (unused, unused, instance, cls -- res)) {

// the result is always a bool, but sometimes we can

// narrow it down to True or False

res = sym_new_type(ctx, &PyBool_Type);

PyTypeObject *inst_type = sym_get_type(instance);

PyTypeObject *cls_o = (PyTypeObject *)sym_get_const(ctx, cls);

if (inst_type && cls_o && sym_matches_type(cls, &PyType_Type)) {

// isinstance(inst, cls) where both inst and cls have

// known types, meaning we can deduce either True or False

// The below check is equivalent to PyObject_TypeCheck(inst, cls)

PyObject *out = Py_False;

if (inst_type == cls_o || PyType_IsSubtype(inst_type, cls_o)) {

out = Py_True;

}

sym_set_const(res, out);

REPLACE_OP(this_instr, _POP_CALL_TWO_LOAD_CONST_INLINE_BORROW, 0, (uintptr_t)out);

}

op(_GUARD_IS_TRUE_POP, (flag -- )) {

if (sym_is_const(ctx, flag)) {

PyObject *value = sym_get_const(ctx, flag);

assert(value != NULL);

eliminate_pop_guard(this_instr, value != Py_True);

}

sym_set_const(flag, Py_True);

}

op(_GUARD_IS_FALSE_POP, (flag -- )) {

if (sym_is_const(ctx, flag)) {

PyObject *value = sym_get_const(ctx, flag);

assert(value != NULL);

eliminate_pop_guard(this_instr, value != Py_False);

}

sym_set_const(flag, Py_False);

}

op(_GUARD_IS_NONE_POP, (val -- )) {

if (sym_is_const(ctx, val)) {

PyObject *value = sym_get_const(ctx, val);

assert(value != NULL);

eliminate_pop_guard(this_instr, !Py_IsNone(value));

}

else if (sym_has_type(val)) {

assert(!sym_matches_type(val, &_PyNone_Type));

eliminate_pop_guard(this_instr, true);

}

sym_set_const(val, Py_None);

}

op(_GUARD_IS_NOT_NONE_POP, (val -- )) {

if (sym_is_const(ctx, val)) {

PyObject *value = sym_get_const(ctx, val);

assert(value != NULL);

eliminate_pop_guard(this_instr, Py_IsNone(value));

View remainder of file in raw view

cpython/Python/optimizer_bytecodes.c at zoneinfo_codeowners · pganssle/cpython · GitHub

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