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gh-139757: Add _GUARD_NOS_COMPACT_ASCII for compact ascii optimization (gh-143332)

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Donghee Na 2026-01-02 20:58:14 +09:00 • committed by GitHub
parent 18f3c59e57
commit 315f474d11
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8 changed files with 1082 additions and 933 deletions
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10
Python/bytecodes.c
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@ -529,6 +529,12 @@ dummy_func(
res = PyStackRef_False;
}
op(_GUARD_NOS_COMPACT_ASCII, (nos, unused -- nos, unused)) {
PyObject *o = PyStackRef_AsPyObjectBorrow(nos);
EXIT_IF(!PyUnicode_CheckExact(o));
EXIT_IF(!PyUnicode_IS_COMPACT_ASCII(o));
}
op(_GUARD_NOS_UNICODE, (nos, unused -- nos, unused)) {
PyObject *o = PyStackRef_AsPyObjectBorrow(nos);
EXIT_IF(!PyUnicode_CheckExact(o));
@ -934,7 +940,7 @@ dummy_func(
}
macro(BINARY_OP_SUBSCR_STR_INT) =
_GUARD_TOS_INT + _GUARD_NOS_UNICODE + unused/5 + _BINARY_OP_SUBSCR_STR_INT + _POP_TOP_INT + POP_TOP;
_GUARD_TOS_INT + _GUARD_NOS_COMPACT_ASCII + unused/5 + _BINARY_OP_SUBSCR_STR_INT + _POP_TOP_INT + POP_TOP;
op(_BINARY_OP_SUBSCR_STR_INT, (str_st, sub_st -- res, s, i)) {
PyObject *sub = PyStackRef_AsPyObjectBorrow(sub_st);
@ -945,8 +951,6 @@ dummy_func(
DEOPT_IF(!_PyLong_IsNonNegativeCompact((PyLongObject *)sub));
Py_ssize_t index = ((PyLongObject*)sub)->long_value.ob_digit[0];
DEOPT_IF(PyUnicode_GET_LENGTH(str) <= index);
// Specialize for reading an ASCII character from an ASCII string:
DEOPT_IF(!PyUnicode_IS_COMPACT_ASCII(str));
uint8_t c = PyUnicode_1BYTE_DATA(str)[index];
assert(c < 128);
STAT_INC(BINARY_OP, hit);