[Bug tree-optimization/88398] vectorization failure for a small loop to do byte comparison

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88398

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
The loop in itself, without knowing the buffer comes from malloc and has
certain size (and at that point it would figure probably out the testsuite is
UB) can't be vectorized.  You have two different pointers, both potentially
with different alignment and no assurance that bytes from 0 to max - 1 are
actually accessible after the one that differs.