[PATCH] D20583: AMDGPU: Fix inconsistent lowering of select of vectors

[Matt Arsenault via llvm-commits]

arsenm created this revision.
arsenm added a reviewer: tstellarAMD.
arsenm added a subscriber: llvm-commits.
Herald added subscribers: kzhuravl, arsenm.

f32 vectors would use a sequence of BFI instructions instead
of unrolled cmp + select. This was better in the case of a VALU
select with SGPR inputs, but we don't have a way of dealing with that
in the DAG.


http://reviews.llvm.org/D20583

Files:
  lib/Target/AMDGPU/AMDGPUISelLowering.cpp
  test/CodeGen/AMDGPU/select-vectors.ll

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