[PATCH] [MIScheduler] Slightly better handling of constrainLocalCopy when both source and dest are local

[Michael Kuperstein]

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D6823

Files:
  llvm/trunk/lib/CodeGen/MachineScheduler.cpp
  llvm/trunk/test/CodeGen/X86/pr21792.ll
  llvm/trunk/test/CodeGen/X86/vector-idiv.ll
  llvm/trunk/test/CodeGen/X86/widen_load-2.ll

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