[Bug c/105449] suspicious optimization since GCC 10.1.0 from -O2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105449

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
You are violating C/C++ aliasing rules.

You have a store as "void*" but then access it as an "int*"
    void * bogus = (void*) 1;
    int *p = (int *) &bogus;
...
        if (p[pos] == 1) {