[Bug tree-optimization/117063] [13/14/15 Regression] Incorrect stringop-overread warning using std::vector::insert at -O3

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117063

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
      Known to fail|                            |14.1.0, 14.2.0, 15.0
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2025-04-01
            Summary|Incorrect stringop-overread |[13/14/15 Regression]
                   |warning using               |Incorrect stringop-overread
                   |std::vector::insert at -O3  |warning using
                   |                            |std::vector::insert at -O3
      Known to work|                            |13.3.0

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
The warning started with r14-3217-g4d6132e59327e809a4d4e3

  tree-optimization/110963 - more PRE when optimizing for size

The -O2 warning went away with r15-571-g1e0ae1f52741f7e013

  tree-optimization/79958 - make DSE track multiple paths

As noted, gcc-15 still warns at -O3