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From: "jg at jguk dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/105651] [12 Regression] bogus "may overlap"
 memcpy warning with std::string and operator+ at -O3
Date: Mon, 13 Feb 2023 11:32:52 +0000
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X-Bugzilla-Component: tree-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105651

Jonny Grant <jg at jguk dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jg at jguk dot org

--- Comment #24 from Jonny Grant <jg at jguk dot org> ---
Hi, Glad it is fixed in trunk. I saw this fail in 12.2 - test case below.

#include <string>

typedef struct a_bc
{
    std::string a;
    std::string b;
} a_t;


void f()
{
    a_t c;

    c.a =3D " sdfsdf fsdfsdf fdfsfdsdf ";   // seems to need this long stri=
ng to
reproduce, down to 8 bytes it didn't
    c.b =3D "E";
}=