[PATCH] D44661: [libcxx] optimize reduce(), hmin(), hmax() by reordering the operations.

[Tim Shen via Phabricator via cfe-commits]

timshen created this revision.
timshen added a reviewer: mclow.lists.
Herald added subscribers: christof, sanjoy.
Herald added a reviewer: EricWF.

Also change std::plus<_Tp> to std::plus<>/__simd_plus_op, so that the
optimization can transparently use the simd<> overloading.


https://reviews.llvm.org/D44661

Files:
  libcxx/include/experimental/simd
  libcxx/test/std/experimental/simd/simd.horizontal/hmax.pass.cpp
  libcxx/test/std/experimental/simd/simd.horizontal/hmin.pass.cpp
  libcxx/test/std/experimental/simd/simd.horizontal/reduce.pass.cpp

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