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bpo-46702: Specialize UNPACK_SEQUENCE (GH-31240)

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Brandt Bucher 2022-02-16 08:48:16 -08:00 • committed by GitHub
parent e8a19b092f
commit a9da085015
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7 changed files with 148 additions and 83 deletions
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92
Python/specialize.c
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@ -51,6 +51,7 @@ static uint8_t adaptive_opcodes[256] = {
[STORE_ATTR] = STORE_ATTR_ADAPTIVE,
[BINARY_OP] = BINARY_OP_ADAPTIVE,
[COMPARE_OP] = COMPARE_OP_ADAPTIVE,
[UNPACK_SEQUENCE] = UNPACK_SEQUENCE_ADAPTIVE,
};
/* The number of cache entries required for a "family" of instructions. */
@ -64,6 +65,7 @@ static uint8_t cache_requirements[256] = {
[STORE_ATTR] = 2, /* _PyAdaptiveEntry and _PyAttrCache */
[BINARY_OP] = 1, // _PyAdaptiveEntry
[COMPARE_OP] = 1, /* _PyAdaptiveEntry */
[UNPACK_SEQUENCE] = 1, // _PyAdaptiveEntry
};
Py_ssize_t _Py_QuickenedCount = 0;
@ -155,6 +157,7 @@ _Py_GetSpecializationStats(void) {
err += add_stat_dict(stats, CALL, "call");
err += add_stat_dict(stats, BINARY_OP, "binary_op");
err += add_stat_dict(stats, COMPARE_OP, "compare_op");
err += add_stat_dict(stats, UNPACK_SEQUENCE, "unpack_sequence");
if (err < 0) {
Py_DECREF(stats);
return NULL;
@ -607,27 +610,10 @@ initial_counter_value(void) {
#define SPEC_FAIL_FOR_ITER_DICT_VALUES 22
#define SPEC_FAIL_FOR_ITER_ENUMERATE 23
/* UNPACK_SEQUENCE */
#define SPEC_FAIL_UNPACK_SEQUENCE_TUPLE_0 9
#define SPEC_FAIL_UNPACK_SEQUENCE_TUPLE_1 10
#define SPEC_FAIL_UNPACK_SEQUENCE_TUPLE_2 11
#define SPEC_FAIL_UNPACK_SEQUENCE_TUPLE_3 12
#define SPEC_FAIL_UNPACK_SEQUENCE_TUPLE_4 13
#define SPEC_FAIL_UNPACK_SEQUENCE_TUPLE_N 14
// UNPACK_SEQUENCE
#define SPEC_FAIL_UNPACK_SEQUENCE_LIST_0 15
#define SPEC_FAIL_UNPACK_SEQUENCE_LIST_1 16
#define SPEC_FAIL_UNPACK_SEQUENCE_LIST_2 17
#define SPEC_FAIL_UNPACK_SEQUENCE_LIST_3 18
#define SPEC_FAIL_UNPACK_SEQUENCE_LIST_4 19
#define SPEC_FAIL_UNPACK_SEQUENCE_LIST_N 20
#define SPEC_FAIL_UNPACK_SEQUENCE_OTHER_0 21
#define SPEC_FAIL_UNPACK_SEQUENCE_OTHER_1 22
#define SPEC_FAIL_UNPACK_SEQUENCE_OTHER_2 23
#define SPEC_FAIL_UNPACK_SEQUENCE_OTHER_3 24
#define SPEC_FAIL_UNPACK_SEQUENCE_OTHER_4 25
#define SPEC_FAIL_UNPACK_SEQUENCE_OTHER_N 26
#define SPEC_FAIL_UNPACK_SEQUENCE_ITERATOR 8
#define SPEC_FAIL_UNPACK_SEQUENCE_SEQUENCE 9
static int
@ -1949,6 +1935,56 @@ success:
adaptive->counter = initial_counter_value();
}
#ifdef Py_STATS
static int
unpack_sequence_fail_kind(PyObject *seq)
{
if (PySequence_Check(seq)) {
return SPEC_FAIL_UNPACK_SEQUENCE_SEQUENCE;
}
if (PyIter_Check(seq)) {
return SPEC_FAIL_UNPACK_SEQUENCE_ITERATOR;
}
return SPEC_FAIL_OTHER;
}
#endif
void
_Py_Specialize_UnpackSequence(PyObject *seq, _Py_CODEUNIT *instr,
SpecializedCacheEntry *cache)
{
_PyAdaptiveEntry *adaptive = &cache->adaptive;
if (PyTuple_CheckExact(seq)) {
if (PyTuple_GET_SIZE(seq) != adaptive->original_oparg) {
SPECIALIZATION_FAIL(UNPACK_SEQUENCE, SPEC_FAIL_EXPECTED_ERROR);
goto failure;
}
if (PyTuple_GET_SIZE(seq) == 2) {
*instr = _Py_MAKECODEUNIT(UNPACK_SEQUENCE_TWO_TUPLE,
_Py_OPARG(*instr));
goto success;
}
*instr = _Py_MAKECODEUNIT(UNPACK_SEQUENCE_TUPLE, _Py_OPARG(*instr));
goto success;
}
if (PyList_CheckExact(seq)) {
if (PyList_GET_SIZE(seq) != adaptive->original_oparg) {
SPECIALIZATION_FAIL(UNPACK_SEQUENCE, SPEC_FAIL_EXPECTED_ERROR);
goto failure;
}
*instr = _Py_MAKECODEUNIT(UNPACK_SEQUENCE_LIST, _Py_OPARG(*instr));
goto success;
}
SPECIALIZATION_FAIL(UNPACK_SEQUENCE, unpack_sequence_fail_kind(seq));
failure:
STAT_INC(UNPACK_SEQUENCE, failure);
cache_backoff(adaptive);
return;
success:
STAT_INC(UNPACK_SEQUENCE, success);
adaptive->counter = initial_counter_value();
}
#ifdef Py_STATS
int
@ -2001,22 +2037,6 @@ int
return SPEC_FAIL_OTHER;
}
int
_PySpecialization_ClassifySequence(PyObject *seq, int n)
{
assert(n >= 0);
if (n > 4) {
n = 5;
}
if (PyTuple_CheckExact(seq)) {
return SPEC_FAIL_UNPACK_SEQUENCE_TUPLE_0 + n;
}
if (PyList_CheckExact(seq)) {
return SPEC_FAIL_UNPACK_SEQUENCE_LIST_0 + n;
}
return SPEC_FAIL_UNPACK_SEQUENCE_OTHER_0 + n;
}
int
_PySpecialization_ClassifyCallable(PyObject *callable)
{