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From: "rguenth at gcc dot gnu.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: Wed, 19 Oct 2022 11:08:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105651

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[12/13 Regression] bogus    |[12 Regression] bogus "may
                   |"may overlap" memcpy        |overlap" memcpy warning
                   |warning with std::string    |with std::string and
                   |and operator+ at -O3        |operator+ at -O3
      Known to work|                            |13.0
      Known to fail|13.0                        |

--- Comment #23 from Richard Biener <rguenth at gcc dot gnu.org> ---
The testcase from comment#5 is fixed on trunk, the preprocessed source of
course not as the workaround was in the library.  Still, fixed in GCC 13.=