[Bug middle-end/59569] [4.9 Regression] r206148 causes internal compiler error: in vect_create_destination_var, at tree-vect-data-refs.c:4294

[bmei at broadcom dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59569

--- Comment #8 from Bingfeng Mei <bmei at broadcom dot com> ---
Sorry for the regression. The assertion happens if storing a constant value
with negative step. Doing permutation of constant is not the best optimization
here. So the easy way to fix is to skip vectorizing this statement in the same
way as before the patch. Or maybe better way is to form a constant vector to
store.