[llvm-dev] Is the CppBackend still supported?

Wed May 4 15:34:18 PDT 2016

I've been looking at the generated IR (together with the IR language
reference and the docs for the API), but I could figure out how to generate
it myself.

But your suggestion to look at the clang source is a good idea. Thanks!

On Wed, May 4, 2016, 23:12 David Blaikie <dblaikie at gmail.com> wrote:

> On Wed, May 4, 2016 at 3:10 PM, Stanislav Manilov <
> stanislav.manilov at gmail.com> wrote:
>
>> As in "look at the source of clang" or as in "look at the -S -emit-llvm"
>> output? If you mean the former, then would that be easy for someone who
>> hasn't seen the clang source before?
>>
> Generally the latter - then potentially set some breakpoints & look at the
> clang source if you're looking for the right APIs.
>
> It's not as easy as the CppBackend (if the CppBackend were up to date) but
> not too bad, I don't think.
>
>
>>
>> On Wed, May 4, 2016, 22:48 David Blaikie <dblaikie at gmail.com> wrote:
>>
>>> The usual advice I provide people is "see what Clang does with an
>>> equivalent C construct"
>>>
>>> On Wed, May 4, 2016 at 12:18 PM, Stanislav Manilov <
>>> stanislav.manilov at gmail.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> There is another benefit to keeping the CppBackend: it's great for
>>>> learning how to use the IR and the C++ API in particular, as can be seen
>>>> from this SO Q&A:
>>>> http://stackoverflow.com/questions/16656855/llvm-ir-string-initialization
>>>>
>>>> But I'll understand if it's considered too much of a burden to keep. I
>>>> can send a patch for the part that I was trying to use, but there's
>>>> probably a lot to fix for it to fully work.
>>>>
>>>> Cheers,
>>>>  - Stan
>>>>
>>>> On Wed, May 4, 2016 at 4:21 PM, David Blaikie <dblaikie at gmail.com>
>>>> wrote:
>>>>
>>>>> +1
>>>>>
>>>>> On Wed, May 4, 2016 at 3:10 AM, Filipe Cabecinhas via llvm-dev <
>>>>> llvm-dev at lists.llvm.org> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> On Wed, May 4, 2016 at 9:35 AM, Ronan KERYELL via llvm-dev
>>>>>> <llvm-dev at lists.llvm.org> wrote:
>>>>>> >>>>>> On Tue, 3 May 2016 16:36:01 -0400, Rafael Espíndola via
>>>>>> llvm-dev <llvm-dev at lists.llvm.org> said:
>>>>>> >
>>>>>> >     Rafael> Care to send a patch deleting it? :-)
>>>>>> >
>>>>>> > On the other hand these requests come back from time to time on the
>>>>>> > mailing list and it is still used in many attics of various
>>>>>> projects as
>>>>>> > a de-facto internal representation to interface with other tools for
>>>>>> > technical/marketing/political/... reasons.
>>>>>> Doesn't seem like it is, if it seems to be broken since some 2013
>>>>>> changes.
>>>>>> It might be in use for projects using older llvm releases, of course.
>>>>>> But those haven't updated their llvm library for a long time, so this
>>>>>> wouldn't be their major problem.
>>>>>>
>>>>>> > So sending a patch to resurrect it in a more modern new life might
>>>>>> be
>>>>>> > also considered instead of many people crafting some half-working
>>>>>> > ashamed kludges far from the sight... :-)
>>>>>> Not really. There's no reason to spend the effort just because "in the
>>>>>> future someone might use it".
>>>>>> If you're saying "I have some half-working things and CppBackend would
>>>>>> be awesome for me", then I guess no one would object to you working on
>>>>>> it, and people would actually help if you needed advice/patch review,
>>>>>> etc.
>>>>>>
>>>>>> But if we have no one actively interested, and there has been no
>>>>>> active development to the point where it's plain broken since a long
>>>>>> time ago, then we probably want to start proposing its deletion.
>>>>>> There's no point in having people who aren't interested in maintaining
>>>>>> it do all this work if the backend can be so out of date and no one
>>>>>> notices.
>>>>>> If it's not usable now and almost no one complains about it being
>>>>>> broken (outside the occasional "Is this working? No.", will those
>>>>>> people notice if it's gone? :-)
>>>>>>
>>>>>> Thank you,
>>>>>>
>>>>>>   Filipe
>>>>>>
>>>>>> > --
>>>>>> >   Ronan KERYELL
>>>>>> >   Xilinx Research Labs, Dublin, Ireland
>>>>>> > _______________________________________________
>>>>>> > LLVM Developers mailing list
>>>>>> > llvm-dev at lists.llvm.org
>>>>>> > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>>>>> _______________________________________________
>>>>>> LLVM Developers mailing list
>>>>>> llvm-dev at lists.llvm.org
>>>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>>>>>
>>>>>
>>>>>
>>>>
>>>
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