[issue34397] remove redundant overflow checks in tuple and list implementations

[Sergey Fedoseev]

New submission from Sergey Fedoseev <fedoseev.sergey at gmail.com>:

Max size of list and tuples is limited by PY_SSIZE_T_MAX / sizeof(PyObject*), so the sum of any two list/tuples sizes always <= PY_SSIZE_T_MAX if sizeof(PyObject*) > 1, which seems true for all supported (existing?) platforms.
It means that overflow checks in app1, ins1, list_concat and tupleconcat are redundant and can be safely removed.

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components: Interpreter Core
messages: 323491
nosy: sir-sigurd
priority: normal
severity: normal
status: open
title: remove redundant overflow checks in tuple and list implementations
type: enhancement
versions: Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34397>
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