[Bug tree-optimization/105651] [12 Regression] bogus "may overlap" memcpy warning with std::string and operator+ at -O3

[jg at jguk dot org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105651

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