[PATCH] Refactor commoning of target specific load/store intrinsics in EarlyCSE

[Sanjin Sijaric]

Hi hfinkel, pete, reames,

Introduce LoadSite and StoreSite to enable us to deal with target specific load/store intrinsics with characteristics similar to those of regular load and store instructions.  Remove ParseMemoryInst from EarlyCSE, and replace it with LoadSite and StoreSite.  The patch also fixes the bug that Hal pointed out where the check for a matching load intrinsic wasn't being done when commoning loads.

http://reviews.llvm.org/D8313

Files:
  include/llvm/Analysis/TargetTransformInfo.h
  include/llvm/Analysis/TargetTransformInfoImpl.h
  include/llvm/IR/LoadStoreSite.h
  lib/Analysis/TargetTransformInfo.cpp
  lib/Target/AArch64/AArch64TargetTransformInfo.cpp
  lib/Target/AArch64/AArch64TargetTransformInfo.h
  lib/Transforms/Scalar/EarlyCSE.cpp

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