[PATCH] LowerSwitch: replace unreachable default with popular case destination

[Hans Wennborg]

REPOSITORY
  rL LLVM

http://reviews.llvm.org/D6697

Files:
  llvm/trunk/lib/Transforms/Utils/LowerSwitch.cpp
  llvm/trunk/test/Transforms/LowerSwitch/2014-06-11-SwitchDefaultUnreachableOpt.ll
  llvm/trunk/test/Transforms/LowerSwitch/fold-popular-case-to-unreachable-default.ll

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