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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/103881] Wconversion false positive when using |= and &= with two rvalues in binary op
Date: Fri, 31 Dec 2021 17:48:58 +0000	[thread overview]
Message-ID: <bug-103881-4-vWKGZ7Nqbe@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-103881-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103881

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
See C99 6.3.1.1/2 and 6.3.1.8, yes, in all cases of |=, &=, |, & the uint8_t
operands are promoted to int.
And the reason why we don't warn for the simple binary operations is that those
common cases have special cases for the warnings, while if you have more
complex expressions you get warnings.  This is a FE warning, value range
propagation etc. doesn't happen at that point...

  parent reply	other threads:[~2021-12-31 17:48 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-31 16:46 [Bug c/103881] New: " thomas at habets dot se
2021-12-31 17:36 ` [Bug c/103881] " thomas at habets dot se
2021-12-31 17:48 ` jakub at gcc dot gnu.org [this message]
2022-01-02 12:35 ` thomas at habets dot se
2022-01-11 18:15 ` cvs-commit at gcc dot gnu.org
2022-01-20  3:58 ` egallager at gcc dot gnu.org
2022-01-20 14:56 ` thomas at habets dot se
2022-01-24  9:21 ` cvs-commit at gcc dot gnu.org
2022-05-10  8:22 ` cvs-commit at gcc dot gnu.org
2022-05-10 15:31 ` jakub at gcc dot gnu.org

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