Minor change to SpecializeClampedRamps.cpp that applies the mutator recursively until the stmt is fixed. This allows us to specialize all of the clamped ramps rather than just the outermost.
Reuse current SpecializeClampedRamp instance for recursively mutating the stmt.
Changed SpecializedClampedRamps to produce a single if stmt, rather than multiple nested stmts.
Merge pull request #446 from kree-colemcalughlin/specialize_all_clamped_ramps

Specialize All Clamped Ramps