[PATCH] Thumb2: Modify codegen for memcpy intrinsic to prefer LDM/STM.

[Peter Collingbourne]

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D9508

Files:
  llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
  llvm/trunk/lib/Target/ARM/ARMISelLowering.h
  llvm/trunk/lib/Target/ARM/ARMInstrInfo.td
  llvm/trunk/lib/Target/ARM/ARMSelectionDAGInfo.cpp
  llvm/trunk/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
  llvm/trunk/lib/Target/ARM/Thumb2SizeReduction.cpp
  llvm/trunk/test/CodeGen/Thumb/ldm-stm-base-materialization.ll
  llvm/trunk/test/CodeGen/Thumb/thumb-memcpy-ldm-stm.ll

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