[LLVMdev] llvm builtins

[reed kotler]

In the latest sync from tip of tree this llvm.pow.f32 and f64 works but 
not any of the other builtins.

shouldn't all these gcc __builtin_xxx be mapping to the corresponding 
llvm ir function, if available?

otherwise how do you make C code use the desired llvm IR function?


On 02/04/2015 04:23 PM, Reid Kleckner wrote:
> Should be fixed in to always use the LLVM builtin in r228240.
>
> On Wed, Feb 4, 2015 at 3:39 PM, reed kotler <rkotler at mips.com 
> <mailto:rkotler at mips.com>> wrote:
>
>     In the following example with gcc style builtins, in once case
>     llvm.powi.f64 is emitted
>     and in the other just a call to library function powf.
>
>      ~/llvm/build/Debug+Asserts/bin/clang -S -emit-llvm pow1.c
>
>     Why is that?
>
>     Is there a way to force the call to an llvm style builtin?
>
>     Tia.
>
>     Reed
>
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