Tim Northover 8799445065 Darwin: add __sinpi (etc) and __exp10 libbuiltins ...

These functions have the same constness properties of the normal libm
functions, which allows LLVM to optimise code better in general. There
are also a couple of specific optimisations that only trigger when
these are properly marked.

rdar://problem/13729466

llvm-svn: 199249

2014-01-14 19:26:03 +00:00

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