[LLVMdev] __builtin___clear_cache

[JF Bastien]

How does this overlap with:

http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20140310/thread.html#208333

Committed in r203674?

The bug mentions doing the mov r7 and svc, when the above code already does
it, I'm somewhat confused.


On Fri, Mar 14, 2014 at 9:11 AM, Renato Golin <renato.golin at linaro.org>wrote:

> Folks,
>
> To implement this bug:
>
> http://llvm.org/bugs/show_bug.cgi?id=19142
>
> I need an LLVM intrinsic to communicate the need to lower the builtin
> wither to noop or a call or even a sequence of instructions. I thought
> about:
>
>   void @llvm.clear_cache(i8 * begin, i8 * end)
>
> to simulate precisely GCC's builtin:
>
>   void __builtin___clear_cache (char *begin, char *end)
>
> which will be, by default, nothing. On ARM and MIPS, it'll call
> __clear_cache.
>
> Is that a good plan?
>
> cheers,
> --renato
> _______________________________________________
> LLVM Developers mailing list
> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20140314/378515ac/attachment.html>