[LLVMdev] Broken PLT on ARM from R183966

[Eric Christopher]

Filing a bug would be a good start, go ahead and cc me and jfb at google.com.

Thanks!

-eric

On Tue, Aug 20, 2013 at 6:10 PM, Gordon Keiser <gkeiser at arxan.com> wrote:
> For ARM targets on linux, revision 183966 made Fast ISel default.
> Unfortunately, Fast ISel is broken in terms of applying the ARMII::MO_PLT
> flags to calls in PIC mode (at least when emitting assembly);  it never does
> this.  The normal ISel pass handles this  situation correctly so a temporary
> local change to disable FastISel for linux / NaCl targets is working for me
> right now.
>
>
>
> I’m not very familiar with the ISel passes.  I’m guessing the correct thing
> to do here would be to apply the attribute correctly in FastISel so it
> works, but I’m kind of unfamiliar with this part of the code and won’t have
> time to dig into it right now, although I’m willing to do it if someone
> points me to the right area of code.
>
>
>
> In the meantime, would it be worthwhile to submit in a modification to
> disable FastISel for non-darwin targets, or is it likely to be fixed
> quickly?
>
>
>
> -Gordon
>
>
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