[PATCH] AArch64: Use CMP;CCMP sequences for and/or/setcc trees.

[Matthias Braun]

Hi t.p.northover,

Previously CCMP/FCCMP instructions were only used by the
AArch64ConditionalCompares pass for control flow. This patch uses them
for SELECT like instructions as well by matching patterns in ISelLowering.

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D8232

Files:
  lib/Target/AArch64/AArch64ISelLowering.cpp
  lib/Target/AArch64/AArch64ISelLowering.h
  lib/Target/AArch64/AArch64InstrFormats.td
  lib/Target/AArch64/AArch64InstrInfo.td
  test/CodeGen/AArch64/arm64-ccmp.ll

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