[PATCH] Select elimination pass

[Gerolf Hoflehner]

Select Elimination Pass update

Improved readability and addressed review:
- moved code that replaces select into a function replaceSelectWithOr()
- moved the checks for the selection condition compare into functio isChainSelectCmpEQBranch().
- cleared up some clutter as David M. had suggested

http://reviews.llvm.org/D5156

Files:
  bindings/ocaml/transforms/scalar/scalar_opts_ocaml.c
  include/llvm-c/Transforms/Scalar.h
  include/llvm/InitializePasses.h
  include/llvm/LinkAllPasses.h
  include/llvm/Transforms/Scalar.h
  lib/LTO/LTOCodeGenerator.cpp
  lib/Transforms/IPO/PassManagerBuilder.cpp
  lib/Transforms/Scalar/CMakeLists.txt
  lib/Transforms/Scalar/Scalar.cpp
  lib/Transforms/Scalar/SelectElimination.cpp
  test/Transforms/SelectElim/
  test/Transforms/SelectElim/select-elim-or.ll
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