[Bug middle-end/35545] tracer pass is run too late

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35545

--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
Well - ideally you'd want to do some CSE, not only VRP (constant propagation in
this case).  So I'd move it even earlier, after pass_lower_vector_ssa?  I
can't see what tracing would break (some odd cases can destroy loop info, but
I think I have disabled all those).