llvm dev - Dec 2019 - Using different opt with clang

Hi,

I have made some changes in the LowerTypeTests Pass of opt, and would like
to use these changes with the clang version I have downloaded.

I compiled clang and llvm from scratch, made my changes in
LowerTypeTests.cpp, and recompiled clang and opt. When I run clang with the
appropriate flags to invoke the pass, it invokes the pass as originally
written, but when I run opt on the relevant bitcode, it invokes the pass as
I have written it.

How can I modify clang to make it use my version of opt to run the pass
I've changed? Thanks!

Regards,
Shishir Jessu
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are you sure you're running the recompiled clang & not some existing
clang
you had on your system? Try putting something more blatant in your
optimization pass, like an assert(false) or other ridiculous thing that'll
make it obvious if the pass is/isn't running, perhaps?

On Tue, Dec 3, 2019 at 2:03 PM Shishir V Jessu via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> Hi,
>
> I have made some changes in the LowerTypeTests Pass of opt, and would like
> to use these changes with the clang version I have downloaded.
>
> I compiled clang and llvm from scratch, made my changes in
> LowerTypeTests.cpp, and recompiled clang and opt. When I run clang with the
> appropriate flags to invoke the pass, it invokes the pass as originally
> written, but when I run opt on the relevant bitcode, it invokes the pass as
> I have written it.
>
> How can I modify clang to make it use my version of opt to run the pass
> I've changed? Thanks!
>
> Regards,
> Shishir Jessu
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
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The LowerTypeTests pass normally runs during LTO (i.e. in the linker). I
would make sure that you've rebuilt lld or the gold plugin (whichever one
you are using) with your pass changes.

Peter

On Tue, Dec 3, 2019 at 11:07 AM David Blaikie via llvm-dev <
llvm-dev at lists.llvm.org> wrote:
> are you sure you're running the recompiled clang & not some
existing clang
> you had on your system? Try putting something more blatant in your
> optimization pass, like an assert(false) or other ridiculous thing
that'll
> make it obvious if the pass is/isn't running, perhaps?
>
> On Tue, Dec 3, 2019 at 2:03 PM Shishir V Jessu via llvm-dev <
> llvm-dev at lists.llvm.org> wrote:
>
>> Hi,
>>
>> I have made some changes in the LowerTypeTests Pass of opt, and would
>> like to use these changes with the clang version I have downloaded.
>>
>> I compiled clang and llvm from scratch, made my changes in
>> LowerTypeTests.cpp, and recompiled clang and opt. When I run clang with
the
>> appropriate flags to invoke the pass, it invokes the pass as originally
>> written, but when I run opt on the relevant bitcode, it invokes the
pass as
>> I have written it.
>>
>> How can I modify clang to make it use my version of opt to run the pass
>> I've changed? Thanks!
>>
>> Regards,
>> Shishir Jessu
>> _______________________________________________
>> LLVM Developers mailing list
>> llvm-dev at lists.llvm.org
>> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>

-- 
-- 
Peter
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