[PATCH] Remove all MMOs from memory operations when tail merging.

[Ana Pazos]

Hi Hal,
I fixed the line format.
As for using std:equal, I do not think it works because it will compare *I1 != *I2 instead of **I1 != **I2 which we need to compare MemoryOperand references.


http://reviews.llvm.org/D7769

Files:
  include/llvm/CodeGen/MachineInstr.h
  include/llvm/CodeGen/MachineMemOperand.h
  lib/CodeGen/BranchFolding.cpp

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