Krzysztof Parzyszek 19cc1fb430 [Hexagon] Define certain aliases for vector instructions
Specifically:
  Vd = #0   -> Vd = vxor(Vd, Vd)
  Vdd = #0  -> Vdd.w = vsub(Vdd.w, Vdd.w)
  Vdd = Vss -> Vdd = vcombine(Vss.H, Vss.L)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267901 91177308-0d34-0410-b5e6-96231b3b80d8
2016-04-28 16:43:16 +00:00
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