[cfe-dev] Clang CC1 option "-fnative-half-type"

[Pirama Arumuga Nainar]

In r235215, I added support for legalizing f16 type in the IR by promoting
operations on f16 to f32 and using f16 <-> f32 conversions on load/store.
With some backend patches, this promotion works successfully on ARM,
AArch64, X86, X86-64, Mips and Mips64.

Is it reasonable to expose the NativeHalfType LangOption in the command
line?  Clang already exposes HalfArgsAndReturns langopt as
'-fallow_half_arguments_and_returns '.

Please advice.
-Pirama
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