[PATCH] Add a Scalarize pass

[Richard Sandiford]

  Remove use of TargetTransformInfo.  Do not add the pass to PassManagerBuilder.

  We also talked about whether to use a reverse post-order traversal, but I don't think it's worth it in the use cases I have.  It could easily be added later it we find a counterexample though.

Hi pekka.jaaskelainen,

http://llvm-reviews.chandlerc.com/D2112

CHANGE SINCE LAST DIFF
  http://llvm-reviews.chandlerc.com/D2112?vs=5540&id=5576#toc

Files:
  include/llvm-c/Transforms/Scalar.h
  include/llvm/InitializePasses.h
  include/llvm/LinkAllPasses.h
  include/llvm/Transforms/Scalar.h
  lib/Transforms/Scalar/CMakeLists.txt
  lib/Transforms/Scalar/Scalar.cpp
  lib/Transforms/Scalar/Scalarizer.cpp
  test/Transforms/Scalarizer/basic.ll
  test/Transforms/Scalarizer/dbginfo.ll
  test/Transforms/Scalarizer/no-data-layout.ll
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