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gh-99761: Add _PyLong_IsPositiveSingleDigit function to check for single digit integers (#100064)

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Pieter Eendebak 2022-12-22 12:30:18 +01:00 • committed by GitHub
parent 68981578ec
commit 2b82c36f17
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 25 additions and 10 deletions
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8
Python/bytecodes.c
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@ -391,8 +391,7 @@ dummy_func(
DEOPT_IF(!PyList_CheckExact(list), BINARY_SUBSCR);
// Deopt unless 0 <= sub < PyList_Size(list)
Py_ssize_t signed_magnitude = Py_SIZE(sub);
DEOPT_IF(((size_t)signed_magnitude) > 1, BINARY_SUBSCR);
DEOPT_IF(!_PyLong_IsPositiveSingleDigit(sub), BINARY_SUBSCR);
assert(((PyLongObject *)_PyLong_GetZero())->ob_digit[0] == 0);
Py_ssize_t index = ((PyLongObject*)sub)->ob_digit[0];
DEOPT_IF(index >= PyList_GET_SIZE(list), BINARY_SUBSCR);
@ -410,8 +409,7 @@ dummy_func(
DEOPT_IF(!PyTuple_CheckExact(tuple), BINARY_SUBSCR);
// Deopt unless 0 <= sub < PyTuple_Size(list)
Py_ssize_t signed_magnitude = Py_SIZE(sub);
DEOPT_IF(((size_t)signed_magnitude) > 1, BINARY_SUBSCR);
DEOPT_IF(!_PyLong_IsPositiveSingleDigit(sub), BINARY_SUBSCR);
assert(((PyLongObject *)_PyLong_GetZero())->ob_digit[0] == 0);
Py_ssize_t index = ((PyLongObject*)sub)->ob_digit[0];
DEOPT_IF(index >= PyTuple_GET_SIZE(tuple), BINARY_SUBSCR);
@ -508,7 +506,7 @@ dummy_func(
DEOPT_IF(!PyList_CheckExact(list), STORE_SUBSCR);
// Ensure nonnegative, zero-or-one-digit ints.
DEOPT_IF(((size_t)Py_SIZE(sub)) > 1, STORE_SUBSCR);
DEOPT_IF(!_PyLong_IsPositiveSingleDigit(sub), STORE_SUBSCR);
Py_ssize_t index = ((PyLongObject*)sub)->ob_digit[0];
// Ensure index < len(list)
DEOPT_IF(index >= PyList_GET_SIZE(list), STORE_SUBSCR);

8
Python/generated_cases.c.h generated
View file

@ -491,8 +491,7 @@
DEOPT_IF(!PyList_CheckExact(list), BINARY_SUBSCR);
// Deopt unless 0 <= sub < PyList_Size(list)
Py_ssize_t signed_magnitude = Py_SIZE(sub);
DEOPT_IF(((size_t)signed_magnitude) > 1, BINARY_SUBSCR);
DEOPT_IF(!_PyLong_IsPositiveSingleDigit(sub), BINARY_SUBSCR);
assert(((PyLongObject *)_PyLong_GetZero())->ob_digit[0] == 0);
Py_ssize_t index = ((PyLongObject*)sub)->ob_digit[0];
DEOPT_IF(index >= PyList_GET_SIZE(list), BINARY_SUBSCR);
@ -517,8 +516,7 @@
DEOPT_IF(!PyTuple_CheckExact(tuple), BINARY_SUBSCR);
// Deopt unless 0 <= sub < PyTuple_Size(list)
Py_ssize_t signed_magnitude = Py_SIZE(sub);
DEOPT_IF(((size_t)signed_magnitude) > 1, BINARY_SUBSCR);
DEOPT_IF(!_PyLong_IsPositiveSingleDigit(sub), BINARY_SUBSCR);
assert(((PyLongObject *)_PyLong_GetZero())->ob_digit[0] == 0);
Py_ssize_t index = ((PyLongObject*)sub)->ob_digit[0];
DEOPT_IF(index >= PyTuple_GET_SIZE(tuple), BINARY_SUBSCR);
@ -642,7 +640,7 @@
DEOPT_IF(!PyList_CheckExact(list), STORE_SUBSCR);
// Ensure nonnegative, zero-or-one-digit ints.
DEOPT_IF(((size_t)Py_SIZE(sub)) > 1, STORE_SUBSCR);
DEOPT_IF(!_PyLong_IsPositiveSingleDigit(sub), STORE_SUBSCR);
Py_ssize_t index = ((PyLongObject*)sub)->ob_digit[0];
// Ensure index < len(list)
DEOPT_IF(index >= PyList_GET_SIZE(list), STORE_SUBSCR);