Commits on Jul 11, 2017

1. Disable big-endian simd in swap_nonoverlapping_bytes …

   This is a workaround for rust-lang#42778, which was git-bisected to rust-lang#40454's
   optimizations to `mem::swap`, later moved to `ptr` in rust-lang#42819.  Natively
   compiled rustc couldn't even compile stage1 libcore on powerpc64 and
   s390x, but they work fine without this `repr(simd)`.  Since powerpc64le
   works OK, it seems probably related to being big-endian.
   
   The underlying problem is not yet known, but this at least makes those
   architectures functional again in the meantime.
   
   cc @arielb1

   

   cuviper committed Jul 11, 2017
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