[Bug tree-optimization/57315] LTO and/or vectorizer performance regression on salsa20 core, 4.7->4.8

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57315

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |ra
                 CC|                            |vmakarov at gcc dot gnu.org

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
The tree opt code is quite the same for 4.8 and 4.7 at -O3 -fwhole-program,
so I believe this boils down to spilling/register allocation (LRA vs. reload).

We inline everything into main () (even at -O2) and we don't
vectorize anything at -O3.