llvm dev - Mar 2018 - Reviving the DebugIR pass

>> This work could also be used to fix [3]. Although this probably needs
>> more though because there's the question of whether we should
preserve
>> existing debug information in an LLVM IR file or write over it when it
>> is given to Clang.
>
> If foo.ll contains edited debug info, `clang -g` shouldn't silently
drop
> the edits. A warning + no-op seems more appropriate.
>
> Happy to help with code review!
>
> thanks,
> vedant
Historically, the (mc) assembler has pretended the `-g` was not present
and simply used the debug info described in the assembler source, with no
diagnostic.  I think that would be reasonable behavior for `llvm-as -g`
or `clang -g foo.ll` as well.
--paulr

Please do take over the pass revival. College hasn't left me with the
bandwidth to continue this side project :)

If there's small things here and there, I'd be happy to pitch in.
However,.whipping the patch into shape is beyond me right now.

Thanks
Siddharth


On Fri 23 Mar, 2018, 00:53 via llvm-dev, <llvm-dev at lists.llvm.org>
wrote:
>
> >> This work could also be used to fix [3]. Although this probably
needs
> >> more though because there's the question of whether we should
preserve
> >> existing debug information in an LLVM IR file or write over it
when it
> >> is given to Clang.
> >
> > If foo.ll contains edited debug info, `clang -g` shouldn't
silently drop
> > the edits. A warning + no-op seems more appropriate.
> >
> > Happy to help with code review!
> >
> > thanks,
> > vedant
>
> Historically, the (mc) assembler has pretended the `-g` was not present
> and simply used the debug info described in the assembler source, with no
> diagnostic.  I think that would be reasonable behavior for `llvm-as -g`
> or `clang -g foo.ll` as well.
> --paulr
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
-- 
Sending this from my phone, please excuse any typos!
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On 23 March 2018 at 04:32, Siddharth Bhat via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
> Please do take over the pass revival. College hasn't left me with the
> bandwidth to continue this side project :)
>
> If there's small things here and there, I'd be happy to pitch in.
> However,.whipping the patch into shape is beyond me right now.
Thanks for confirming. I won't be able to take this up immediately but
I should have a little bit of free time next week to start looking at
this.

Dan.