[PATCH] Implement ARM EHABI

[Ilyong Cho]

Ooops I've accidently pushed send button :)

Anyway, IMO, There is no problem the patch from Logan regarding to the
issue I mentioned, because there is no way to produce the case right now.
But after llvm-mc understand unwind directive, it can be the case.

Regards,
Ilyong Cho
2013. 4. 15. 오후 6:12에 "Ilyong Cho" <ilyoan at gmail.com>님이 작성:

> Hi Anton
>
> Actually I'm not sure if it is possible to make such test cases using
> higher language. And llvm-mc looks like does not understand unwind
> directives(am I right?) so it is impossible to make test case using llvm-mc.
>
> The counter example is a wired situation that pushes the same register
> into stack twice from function prologue(I just analyzed reviewing source
> code, so I can be wrong). There are some such handmade assemblies In my
> personal project for some reasons(ex. stack manipulation)
> And I'm pretty sure that higher language compilers never generate such
> assembly.
>  2013. 4. 15. 오후 5:28에 "Anton Korobeynikov" <anton at korobeynikov.info>님이
> 작성:
>
>> Hello,
>>
>> > I've juat looked the patch and I think it looks good but I found the
>> > implementation of that patch is different from gas's. I have a weird use
>> > case (hand made ARM assembly with a complex function prologue) that the
>> > patch on D414 couldn't cover but gas implementation(and mine) could
>> cover.
>> Will it be possible for you to provide a testcase then? Knowing that
>> the code is broken is not a good thing for committing it :)
>>
>> --
>> With best regards, Anton Korobeynikov
>> Faculty of Mathematics and Mechanics, Saint Petersburg State University
>>
>
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