[LLVMdev] Support for Soft-float

[Eric Cheng]

Hi Asiri,

Unfortunately, I had also tried using the -target switch previously
("-target sparc", "-target arm", etc.). However, since it ultimately made
difference, I left it out of my example for brevity.

Thanks,
Eric

On Thu, Sep 25, 2014 at 3:02 AM, Asiri Rathnayake <asiri.rathnayake at arm.com>
wrote:

> And, Apologies for the footer. Wrong account.
>
> Best,
>
> - Asiri
>
> -----Original Message-----
> From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On
> Behalf Of Asiri Rathnayake
> Sent: 25 September 2014 10:48
> To: Eric Cheng; llvmdev at cs.uiuc.edu
> Subject: Re: [LLVMdev] Support for Soft-float
>
> Hi Eric,
>
> > Running "clang -c -emit-llvm -msoft-float test.c -o test.bc" doesn't
> generate IR with soft-float library calls (perhaps understandably) - only
> hard float instructions. I would expect the frontend to at least be able to
> generate the library calls even though I'm not asking it to link to any
> library yet.
>
> I think you have to explicitly pass the target. For an example:
>
> ./clang -c -emit-llvm -msoft-float test.c -o test.bc -###
>
> Does not show -msoft-float passed into the backend. Whereas the following
> invocation does:
>
> ./clang -target sparc-none-linux-gnu -c -emit-llvm -msoft-float test.c -o
> test.bc -###
>
> May be give this a try and see if it produces the correct lib calls?
>
> I happened to be working on something related (for ARM).
>
> - Asiri
>
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