[PATCH] ARMEB: Vector extend operations

[Christian Pirker]

Hi all,

This patch implements correct vector extensions from <2 x 8>, <2 x 16>, and <2 x 32> to <2 x 64> and <4 x 8>, <4 x 16> to <4 x 32> vector type for big endian.
It applies to both integer and float type vectors. The CLANG vectorizer is likely to generate such vector extensions for array type casts.
Please review.

Thanks,
Christian

http://reviews.llvm.org/D4043

Files:
  lib/Target/ARM/ARMISelLowering.cpp
  lib/Target/ARM/ARMInstrNEON.td
  test/CodeGen/ARM/big-endian-neon-extend.ll
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