[PATCH] CodeGen: convert double -> __fp16 in one step

[Ahmed Bougacha]

Hi all,

Ping for Tim's patch!

I rebased it and added the one-step __fp16->double conversion, which, while not necessary for correctness, is nice to have (if only for symmetry.)
We're still missing the libcalls, so this will break the conversions from/to double.  However, I agree with Tim in that it's better than incorrect results.

-Ahmed


http://reviews.llvm.org/D4602

Files:
  lib/CodeGen/CGExprScalar.cpp
  test/CodeGen/fp16-ops.c

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