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GH-118095: Convert DEOPT_IFs on likely side exits to EXIT_IFs (GH-118106)

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Covert DEOPT_IFs on likely side exits to EXIT_IFs
This commit is contained in:
Mark Shannon 2024-04-24 14:37:55 +01:00 committed by GitHub
parent 7d369d471c
commit 77cd0428b6
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GPG Key ID: B5690EEEBB952194
4 changed files with 24 additions and 24 deletions
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10
Include/internal/pycore_opcode_metadata.h generated
View File

@ -984,7 +984,7 @@ const struct opcode_metadata _PyOpcode_opcode_metadata[268] = {
[CACHE] = { true, INSTR_FMT_IX, HAS_ESCAPES_FLAG },
[CALL] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_EVAL_BREAK_FLAG | HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG },
[CALL_ALLOC_AND_ENTER_INIT] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG },
[CALL_BOUND_METHOD_EXACT_ARGS] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_DEOPT_FLAG },
[CALL_BOUND_METHOD_EXACT_ARGS] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_DEOPT_FLAG | HAS_EXIT_FLAG },
[CALL_BUILTIN_CLASS] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_EVAL_BREAK_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[CALL_BUILTIN_FAST] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_EVAL_BREAK_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[CALL_BUILTIN_FAST_WITH_KEYWORDS] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_EVAL_BREAK_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
@ -1000,7 +1000,7 @@ const struct opcode_metadata _PyOpcode_opcode_metadata[268] = {
[CALL_METHOD_DESCRIPTOR_FAST_WITH_KEYWORDS] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_EVAL_BREAK_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[CALL_METHOD_DESCRIPTOR_NOARGS] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_EVAL_BREAK_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[CALL_METHOD_DESCRIPTOR_O] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_EVAL_BREAK_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[CALL_PY_EXACT_ARGS] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_DEOPT_FLAG },
[CALL_PY_EXACT_ARGS] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_DEOPT_FLAG | HAS_EXIT_FLAG },
[CALL_PY_WITH_DEFAULTS] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_DEOPT_FLAG },
[CALL_STR_1] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_EVAL_BREAK_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[CALL_TUPLE_1] = { true, INSTR_FMT_IBC00, HAS_ARG_FLAG | HAS_EVAL_BREAK_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
@ -1036,9 +1036,9 @@ const struct opcode_metadata _PyOpcode_opcode_metadata[268] = {
[FORMAT_WITH_SPEC] = { true, INSTR_FMT_IX, HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[FOR_ITER] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_JUMP_FLAG | HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG },
[FOR_ITER_GEN] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_DEOPT_FLAG },
[FOR_ITER_LIST] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_JUMP_FLAG | HAS_DEOPT_FLAG },
[FOR_ITER_RANGE] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_JUMP_FLAG | HAS_DEOPT_FLAG | HAS_ERROR_FLAG },
[FOR_ITER_TUPLE] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_JUMP_FLAG | HAS_DEOPT_FLAG },
[FOR_ITER_LIST] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_JUMP_FLAG | HAS_EXIT_FLAG },
[FOR_ITER_RANGE] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_JUMP_FLAG | HAS_EXIT_FLAG | HAS_ERROR_FLAG },
[FOR_ITER_TUPLE] = { true, INSTR_FMT_IBC, HAS_ARG_FLAG | HAS_JUMP_FLAG | HAS_EXIT_FLAG },
[GET_AITER] = { true, INSTR_FMT_IX, HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },
[GET_ANEXT] = { true, INSTR_FMT_IX, HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG },
[GET_AWAITABLE] = { true, INSTR_FMT_IB, HAS_ARG_FLAG | HAS_ERROR_FLAG | HAS_ESCAPES_FLAG },

14
Include/internal/pycore_uop_metadata.h generated
View File

@ -171,14 +171,14 @@ const uint16_t _PyUop_Flags[MAX_UOP_ID+1] = {
[_GET_ITER] = HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_GET_YIELD_FROM_ITER] = HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG,
[_FOR_ITER_TIER_TWO] = HAS_DEOPT_FLAG | HAS_ERROR_FLAG | HAS_ERROR_NO_POP_FLAG | HAS_ESCAPES_FLAG,
[_ITER_CHECK_LIST] = HAS_DEOPT_FLAG,
[_GUARD_NOT_EXHAUSTED_LIST] = HAS_DEOPT_FLAG,
[_ITER_CHECK_LIST] = HAS_EXIT_FLAG,
[_GUARD_NOT_EXHAUSTED_LIST] = HAS_EXIT_FLAG,
[_ITER_NEXT_LIST] = 0,
[_ITER_CHECK_TUPLE] = HAS_DEOPT_FLAG,
[_GUARD_NOT_EXHAUSTED_TUPLE] = HAS_DEOPT_FLAG,
[_ITER_CHECK_TUPLE] = HAS_EXIT_FLAG,
[_GUARD_NOT_EXHAUSTED_TUPLE] = HAS_EXIT_FLAG,
[_ITER_NEXT_TUPLE] = 0,
[_ITER_CHECK_RANGE] = HAS_DEOPT_FLAG,
[_GUARD_NOT_EXHAUSTED_RANGE] = HAS_DEOPT_FLAG,
[_ITER_CHECK_RANGE] = HAS_EXIT_FLAG,
[_GUARD_NOT_EXHAUSTED_RANGE] = HAS_EXIT_FLAG,
[_ITER_NEXT_RANGE] = HAS_ERROR_FLAG,
[_WITH_EXCEPT_START] = HAS_ERROR_FLAG | HAS_ESCAPES_FLAG,
[_PUSH_EXC_INFO] = 0,
@ -194,7 +194,7 @@ const uint16_t _PyUop_Flags[MAX_UOP_ID+1] = {
[_CHECK_CALL_BOUND_METHOD_EXACT_ARGS] = HAS_ARG_FLAG | HAS_DEOPT_FLAG,
[_INIT_CALL_BOUND_METHOD_EXACT_ARGS] = HAS_ARG_FLAG,
[_CHECK_PEP_523] = HAS_DEOPT_FLAG,
[_CHECK_FUNCTION_EXACT_ARGS] = HAS_ARG_FLAG | HAS_DEOPT_FLAG,
[_CHECK_FUNCTION_EXACT_ARGS] = HAS_ARG_FLAG | HAS_EXIT_FLAG,
[_CHECK_STACK_SPACE] = HAS_ARG_FLAG | HAS_DEOPT_FLAG,
[_INIT_CALL_PY_EXACT_ARGS_0] = HAS_PURE_FLAG,
[_INIT_CALL_PY_EXACT_ARGS_1] = HAS_PURE_FLAG,

22
Python/bytecodes.c
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@ -2628,7 +2628,7 @@ dummy_func(
}
op(_ITER_CHECK_LIST, (iter -- iter)) {
DEOPT_IF(Py_TYPE(iter) != &PyListIter_Type);
EXIT_IF(Py_TYPE(iter) != &PyListIter_Type);
}
replaced op(_ITER_JUMP_LIST, (iter -- iter)) {
@ -2657,8 +2657,8 @@ dummy_func(
_PyListIterObject *it = (_PyListIterObject *)iter;
assert(Py_TYPE(iter) == &PyListIter_Type);
PyListObject *seq = it->it_seq;
DEOPT_IF(seq == NULL);
DEOPT_IF((size_t)it->it_index >= (size_t)PyList_GET_SIZE(seq));
EXIT_IF(seq == NULL);
EXIT_IF((size_t)it->it_index >= (size_t)PyList_GET_SIZE(seq));
}
op(_ITER_NEXT_LIST, (iter -- iter, next)) {
@ -2677,7 +2677,7 @@ dummy_func(
_ITER_NEXT_LIST;
op(_ITER_CHECK_TUPLE, (iter -- iter)) {
DEOPT_IF(Py_TYPE(iter) != &PyTupleIter_Type);
EXIT_IF(Py_TYPE(iter) != &PyTupleIter_Type);
}
replaced op(_ITER_JUMP_TUPLE, (iter -- iter)) {
@ -2703,8 +2703,8 @@ dummy_func(
_PyTupleIterObject *it = (_PyTupleIterObject *)iter;
assert(Py_TYPE(iter) == &PyTupleIter_Type);
PyTupleObject *seq = it->it_seq;
DEOPT_IF(seq == NULL);
DEOPT_IF(it->it_index >= PyTuple_GET_SIZE(seq));
EXIT_IF(seq == NULL);
EXIT_IF(it->it_index >= PyTuple_GET_SIZE(seq));
}
op(_ITER_NEXT_TUPLE, (iter -- iter, next)) {
@ -2724,7 +2724,7 @@ dummy_func(
op(_ITER_CHECK_RANGE, (iter -- iter)) {
_PyRangeIterObject *r = (_PyRangeIterObject *)iter;
DEOPT_IF(Py_TYPE(r) != &PyRangeIter_Type);
EXIT_IF(Py_TYPE(r) != &PyRangeIter_Type);
}
replaced op(_ITER_JUMP_RANGE, (iter -- iter)) {
@ -2744,7 +2744,7 @@ dummy_func(
op(_GUARD_NOT_EXHAUSTED_RANGE, (iter -- iter)) {
_PyRangeIterObject *r = (_PyRangeIterObject *)iter;
assert(Py_TYPE(r) == &PyRangeIter_Type);
DEOPT_IF(r->len <= 0);
EXIT_IF(r->len <= 0);
}
op(_ITER_NEXT_RANGE, (iter -- iter, next)) {
@ -3145,11 +3145,11 @@ dummy_func(
}
op(_CHECK_FUNCTION_EXACT_ARGS, (func_version/2, callable, self_or_null, unused[oparg] -- callable, self_or_null, unused[oparg])) {
DEOPT_IF(!PyFunction_Check(callable));
EXIT_IF(!PyFunction_Check(callable));
PyFunctionObject *func = (PyFunctionObject *)callable;
DEOPT_IF(func->func_version != func_version);
EXIT_IF(func->func_version != func_version);
PyCodeObject *code = (PyCodeObject *)func->func_code;
DEOPT_IF(code->co_argcount != oparg + (self_or_null != NULL));
EXIT_IF(code->co_argcount != oparg + (self_or_null != NULL));
}
op(_CHECK_STACK_SPACE, (callable, unused, unused[oparg] -- callable, unused, unused[oparg])) {

2
Python/optimizer.c
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@ -696,7 +696,7 @@ top: // Jump here after _PUSH_FRAME or likely branches
if (expansion->nuops > 0) {
// Reserve space for nuops (+ _SET_IP + _EXIT_TRACE)
int nuops = expansion->nuops;
RESERVE(nuops);
RESERVE(nuops + 1); /* One extra for exit */
if (expansion->uops[nuops-1].uop == _POP_FRAME) {
// Check for trace stack underflow now:
// We can't bail e.g. in the middle of