[llvm-dev] [GSoC] First draft project proposal; IR level interpreter debugger

[Jonathan Roelofs via llvm-dev]

On 3/25/16 11:58 AM, Janek van Oirschot via llvm-dev wrote:
> On Fri, Mar 25, 2016 at 12:45 PM, Tobias Grosser <tobias at grosser.es> wrote:
>> On 03/25/2016 03:28 AM, Philip Reames via llvm-dev wrote:
>>>
>>> I've scanned over your proposal, but am not quite sure I understand your
>>> objective.  Is your intent to be able to step through IR source in a
>>> debugger and inspect intermediate state?
>
> Yes, that is what I had in mind with this proposal.
>
>>> If so, you may consider
>>> whether "simply" inserting debug metatadata into your IR which describes
>>> the IR source, and then compiling it gives you your desired result.
>>
>>
>> A pass that does precisely this has been contributed by someone from Intel
>> at some point but got removed later on for reasons I don't recall.
>> It might be worth to scan the archives.
>>
>
> Thanks for your response, I have searched in archives and I think I
> found some references to what you're talking about (DebugIR?). Though,
> I haven't been able to find the reason as to why it was removed. My
> concern now is whether this GSoC project has become obsolete because
> of this.
>
> I'll continue trying to find the reason why this was removed.

IIRC, it was removed because it was buggy, and not well maintained.


Jon

>
> Kind regards,
> Janek
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-- 
Jon Roelofs
jonathan at codesourcery.com
CodeSourcery / Mentor Embedded