From 3f2f2ebd3ca7c13eaa4f4bdb0043032d0daeac03 Mon Sep 17 00:00:00 2001
From: Sergey Matveev <stargrave@stargrave.org>
Date: Tue, 4 Jan 2022 13:24:08 +0300
Subject: [PATCH] =?utf8?q?=D0=9F=D1=80=D0=BE=20strict=20aliasing=20=D0=B2?=
 =?utf8?q?=20=D0=A1=D0=B8?=
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https://lkml.org/lkml/2009/1/12/369
https://lkml.org/lkml/2018/6/5/769
https://danso.ca/blog/strict-aliasing/
https://habr.com/ru/post/114117/
https://bugzilla.kernel.org/show_bug.cgi?id=12597
https://bugzilla.mozilla.org/show_bug.cgi?id=1031653
https://stackoverflow.com/questions/47232954/what-does-fwrapv-do
Ð 153271e2a5ebe0450329c630e19ab92022d9966f ÑÐ¿Ð¾Ð¼Ð¸Ð½Ð°Ð» Ð¿ÑÐ¾ strict aliasing
Ð¸ ÐºÐ¾ÑÑÐµÐºÑÐ½Ð¾ÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·Ð¾Ð²Ð°Ð½Ð¸Ñ char-Ð¾Ð². Ð¢Ð¾ÑÐ²Ð°Ð»ÑÐ´Ñ ÐºÑÐ¸ÑÐ¸ÐºÑÐµÑ Ð² ÑÐ²Ð¾ÑÐ¼ Ð´ÑÑÐµ
Ð²ÑÑ ÑÑÑ Ð¸Ð´ÐµÑ aliasing-Ð°.

Ð ÐµÑÑ Ð¾Ð½Ð¸ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·ÑÑÑ -fwrapv, Ð¿ÑÐµÐ´Ð¿Ð¾Ð»Ð°Ð³Ð°Ñ ÑÑÐ¾ Ð²ÑÐµ Ð°ÑÑÐ¸ÑÐµÐºÑÑÑÑ Ð³Ð´Ðµ Ð¾Ð½Ð¸
ÑÐ¾Ð±Ð¸ÑÐ°ÑÑÑÑ Ð¸ÑÐ¿Ð¾Ð»ÑÐ·ÑÑÑ 2's complement signed ÑÐ¸ÑÐ»Ð°, Ð¸Ð½Ð°ÑÐµ Ð¿ÐµÑÐµÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¸Ðµ
Ð±ÑÐ´ÐµÑ ÑÑÐ¸ÑÐ°ÑÑÑÑ UB Ð¸ ÐºÐ¾Ð¼Ð¿Ð¸Ð»ÑÑÐ¾Ñ Ð²Ð¾Ð»ÐµÐ½ ÑÐ²Ð¾ÑÐ¸ÑÑ Ð»ÑÐ±ÑÑ Ð½ÐµÐ¾Ð¶Ð¸Ð´Ð°Ð½Ð½ÑÑ Ð´Ð¸ÑÑ.
Ð¢Ð¾Ð»ÑÐºÐ¾ Ð² Ð±ÑÐ´ÑÑÐ¸Ñ ÑÑÐ°Ð½Ð´Ð°ÑÑÐ°Ñ 2's complement Ð±ÑÐ´ÐµÑ ÑÑÐ°Ð½Ð´Ð°ÑÑÐ¾Ð¼ Ð¸
Ð¿ÐµÑÐµÐ¿Ð¾Ð»Ð½ÐµÐ½Ð¸Ðµ Ð² Ð½ÑÐ¼ ÑÐ¶Ðµ ÑÑÐ°ÑÐ½ÑÐ¼ Ð¿Ð¾Ð²ÐµÐ´ÐµÐ½Ð¸ÐµÐ¼.
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2.50.0