What alignment guarantees would be helpful?

[ronawho]

What would we need to not use FFTW_UNALIGNED?

Alignment on arrays? Alignment on forall loop chunking of arrays? Anything else?

Related:

• http://www.fftw.org/fftw3_doc/Planner-Flags.html
• http://www.fftw.org/fftw3_doc/SIMD-alignment-and-fftw_005fmalloc.html