[PATCH] CodeGen target hook for emitting intrinsic or libcall for pow*

[Eli Bendersky]

>
>
>> It would be isolated to target-specific logic in target-specific parts of
>> the toolchain instead of inventing a new option that's basically "do what
>> PNaCl wants" and then propagating it through the entire compiler.
>>
>
> Clang currently supports le32 as a target. So it's not an issue of a
> single "driver wrapper". We purposefully keep PNaCl as open as possible,
> and other developers and toolchain writers may use this target to generate
> PNaCl bitcode or something similar with Clang.
>
>
> I'm not asking you to wrap the driver.  I'm asking you to change clang's
> driver logic when targeting *-*-nacl to use the existing logic to suppress
> builtin treatment of functions.
>

OK, I'll take a look at the driver logic and try to see if I can come up
with an alternative patch.

Eli
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