[PATCH] Value soft float calls as more expensive in the inliner.

[Cameron Esfahani]

When evaluating floating point instructions in the inliner, ask the TTI whether it is an expensive operation.  By default, it's not an expensive operation.  This keeps the default behavior the same as before.  The ARM TTI has been updated to return back TCC_Expensive for targets which don't have hardware floating point.

http://reviews.llvm.org/D6936

Files:
  include/llvm/Analysis/TargetTransformInfo.h
  lib/Analysis/IPA/InlineCost.cpp
  lib/Analysis/TargetTransformInfo.cpp
  lib/Target/ARM/ARMSubtarget.h
  lib/Target/ARM/ARMTargetTransformInfo.cpp

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