[PATCH] [AArch64] Override useAA and remove unneeded edges in the scheduling graph. (Phabricator)

[Chad Rosier]

Hi jmolloy, Jiangning, t.p.northover,

All,
This patch removes edges in the scheduling graph between stores/loads off the same base register if memory accesses do not overlap.   An improvement on eembc/automark on a cortex-a53 device, as well as a small improvement on spec2000/eon.  No significant performance changes were observed on cortex-a57, but this may be more relevant on in-order architectures.  Please have a look.

Thanks,
  Sanjin

(I submitted on behalf of Sanjin to ease review.)

http://reviews.llvm.org/D5103

Files:
  include/llvm/Target/TargetInstrInfo.h
  lib/CodeGen/ScheduleDAGInstrs.cpp
  lib/Target/AArch64/AArch64InstrInfo.cpp
  lib/Target/AArch64/AArch64InstrInfo.h
  lib/Target/AArch64/AArch64Subtarget.h
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