Ahmed Bougacha 8ebcdb3bc3 [CodeGen] Combine concat_vectors of scalars into build_vector. ...

Combine something like:
  (v8i8 concat_vectors (v2i8 bitcast (i16)) x4)
into:
  (v8i8 (bitcast (v4i16 BUILD_VECTOR (i16) x4)))

If any of the scalars are floating point, use that throughout.

Differential Revision: http://reviews.llvm.org/D8948

llvm-svn: 234809

2015-04-13 22:57:21 +00:00

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