[PATCH] [Hexagon] Generate loop1 instruction for nested loops

[Brendon Cahoon]

Hi sundeepk, iajbar,

loop1 is for the outer loop and loop0 is for the inner loop.

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D9680

Files:
  lib/Target/Hexagon/HexagonHardwareLoops.cpp
  test/CodeGen/Hexagon/hwloop-loop1.ll

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  http://reviews.llvm.org/settings/panel/emailpreferences/
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