[Bug tree-optimization/126316] [13/14/15/16/17 Regression] Bogus -Wdangling-pointer on variable length arrays in different scopes in -O2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126316

Drea Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.6.4
            Summary|Bogus -Wdangling-pointer on |[13/14/15/16/17 Regression]
                   |variable length arrays in   |Bogus -Wdangling-pointer on
                   |different scopes in -O2     |variable length arrays in
                   |                            |different scopes in -O2
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=51491

--- Comment #2 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Note the diagnostic is new in GCC 12 but the wrong handling of this has been
there since r0-114046-g2f31f742a6932e which added
insert_clobber_before_stack_restore.