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gh-98831: rewrite CHECK_EG_MATCH opcode in the instruction definition DSL (#101269)

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Irit Katriel 2023-01-24 09:43:16 +00:00 • committed by GitHub
parent 7589d713a1
commit 8c183cddd3
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 27 additions and 58 deletions
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40
Python/bytecodes.c
View file

@ -1894,44 +1894,24 @@ dummy_func(
b = Py_NewRef((res^oparg) ? Py_True : Py_False);
}
// stack effect: ( -- )
inst(CHECK_EG_MATCH) {
PyObject *match_type = POP();
inst(CHECK_EG_MATCH, (exc_value, match_type -- rest, match)) {
if (check_except_star_type_valid(tstate, match_type) < 0) {
Py_DECREF(match_type);
goto error;
DECREF_INPUTS();
ERROR_IF(true, error);
}
PyObject *exc_value = TOP();
PyObject *match = NULL, *rest = NULL;
match = NULL;
rest = NULL;
int res = exception_group_match(exc_value, match_type,
&match, &rest);
Py_DECREF(match_type);
if (res < 0) {
goto error;
}
DECREF_INPUTS();
ERROR_IF(res < 0, error);
if (match == NULL || rest == NULL) {
assert(match == NULL);
assert(rest == NULL);
goto error;
}
if (Py_IsNone(match)) {
PUSH(match);
Py_XDECREF(rest);
}
else {
/* Total or partial match - update the stack from
* [val]
* to
* [rest, match]
* (rest can be Py_None)
*/
assert((match == NULL) == (rest == NULL));
ERROR_IF(match == NULL, error);
SET_TOP(rest);
PUSH(match);
if (!Py_IsNone(match)) {
PyErr_SetExcInfo(NULL, Py_NewRef(match), NULL);
Py_DECREF(exc_value);
}
}

2
Python/ceval.c
View file

@ -1946,7 +1946,7 @@ exception_group_match(PyObject* exc_value, PyObject *match_type,
}
/* no match */
*match = Py_NewRef(Py_None);
*rest = Py_NewRef(Py_None);
*rest = Py_NewRef(exc_value);
return 0;
}

41
Python/generated_cases.c.h generated
View file

@ -2251,43 +2251,32 @@
}
TARGET(CHECK_EG_MATCH) {
PyObject *match_type = POP();
PyObject *match_type = PEEK(1);
PyObject *exc_value = PEEK(2);
PyObject *rest;
PyObject *match;
if (check_except_star_type_valid(tstate, match_type) < 0) {
Py_DECREF(exc_value);
Py_DECREF(match_type);
goto error;
if (true) goto pop_2_error;
}
PyObject *exc_value = TOP();
PyObject *match = NULL, *rest = NULL;
match = NULL;
rest = NULL;
int res = exception_group_match(exc_value, match_type,
&match, &rest);
Py_DECREF(exc_value);
Py_DECREF(match_type);
if (res < 0) {
goto error;
}
if (res < 0) goto pop_2_error;
if (match == NULL || rest == NULL) {
assert(match == NULL);
assert(rest == NULL);
goto error;
}
if (Py_IsNone(match)) {
PUSH(match);
Py_XDECREF(rest);
}
else {
/* Total or partial match - update the stack from
* [val]
* to
* [rest, match]
* (rest can be Py_None)
*/
assert((match == NULL) == (rest == NULL));
if (match == NULL) goto pop_2_error;
SET_TOP(rest);
PUSH(match);
if (!Py_IsNone(match)) {
PyErr_SetExcInfo(NULL, Py_NewRef(match), NULL);
Py_DECREF(exc_value);
}
POKE(1, match);
POKE(2, rest);
DISPATCH();
}

2
Python/opcode_metadata.h
View file

@ -119,7 +119,7 @@ static const struct {
[COMPARE_AND_BRANCH_STR] = { 2, 0, DIR_NONE, DIR_NONE, DIR_NONE, true, INSTR_FMT_IBC0 },
[IS_OP] = { 2, 1, DIR_NONE, DIR_NONE, DIR_NONE, true, INSTR_FMT_IB },
[CONTAINS_OP] = { 2, 1, DIR_NONE, DIR_NONE, DIR_NONE, true, INSTR_FMT_IB },
[CHECK_EG_MATCH] = { -1, -1, DIR_NONE, DIR_NONE, DIR_NONE, true, INSTR_FMT_IX },
[CHECK_EG_MATCH] = { 2, 2, DIR_NONE, DIR_NONE, DIR_NONE, true, INSTR_FMT_IX },
[CHECK_EXC_MATCH] = { 2, 2, DIR_NONE, DIR_NONE, DIR_NONE, true, INSTR_FMT_IX },
[IMPORT_NAME] = { 2, 1, DIR_NONE, DIR_NONE, DIR_NONE, true, INSTR_FMT_IB },
[IMPORT_FROM] = { 1, 2, DIR_NONE, DIR_NONE, DIR_NONE, true, INSTR_FMT_IB },