[llvm-dev] GSoC Interested student
Doerfert, Johannes via llvm-dev
llvm-dev at lists.llvm.org
Tue Apr 7 20:25:39 PDT 2020
On 4/7/20 7:32 AM, Hamilton Tobon Mosquera wrote:
> Hi Johannes,
>
> In order to create the testcases with the FIXMEs showing how it
should look after the transformation, I've been trying to come up with a
way of splitting the runtime call __tgt_target_teams based on Silei's
recent patch D77005. I like the idea of using its asynchronous version
__tgt_target_teams_nowait, but I think we would have to modify it,
either to return the async_info struct:
>
> __tgt_async_info __tgt_target_teams_nowait(...) // This would break
the current canonical way of returning a status code.
>
> or to receive it as a pointer and modify its content, then waiting on
that async_info object:
>
> int __tgt_target_teams_nowait(..., __tgt_async_info *async_info =
nullptr)
>
> The first way leads to modify the Clang's code generation, and I'm
not sure if that is a good idea. Concerning the second way, I'm not sure
if having a default argument would lead also to modify the Clang's code
generation.
>
> Another possible solution would be to implement another runtime
function, avoiding the need to modify the _nowait version. This would
lead to implement new runtime functions for each runtime call that
implies data transfers, which is perhaps worse. I don't know which
approach is better, should I look for a way of modifying Clang's code
generation in case of needed?. I'm trying to be as less disruptive as
possible. Can you give me some advice?.
We are in the process of moving clangs OpenMP code generation into the
OpenMPIRBuilder. While doing so we refactor/replace/rewrite stuff as we
see fit. Thus, changing Clang, or better writing a different code
generation in the OpenMPIRBuilder, is always an option.
That said, I was expecting to create two new runtime calls per existing
one but I have not really thought this through. What I imagined is
something vaguely looking like this:
Current:
int omp_transfer_data(device, src, dst, size);
New:
```
// In the runtime {
handle omp_transfer_data_issue(device, src, dst, size) {
// some logic that was in omp_transfer_data before creating and using
// handle
return some_handle; // probably extended __tgt_async_info, can be an
// argument as well.
}
int omp_transfer_data_wait(device, src, dst, size, handle) {
// some logic that was in omp_transfer_data before using handle
return error_code;
}
// }
// In the runtime or in the header
int omp_transfer_data(device, src, dst, size) {
handle = omp_transfer_data_issue(...);
return omp_transfer_data_wait(..., handle);
}
```
Now we can inline omp_transfer_data or replace it by the two calls to
make the issue and wait explicit.
Long story short, we will most certainly need new functions, how they
look is up to you initially. Look at the other functions for inspiration
and if something is off we'll let you know during code review ;)
Does that help? Feel free to ask more questions!
Cheers,
Johannes
P.S. Tomorrow there is an OpenMP in LLVM bi-weekly call which might be
interesting (though it might be too early):
http://lists.llvm.org/pipermail/openmp-dev/2020-April/003292.html
> Thank you.
>
> Hamilton.
>
> On 28/03/20 11:05 p. m., Doerfert, Johannes wrote:
>> On 3/28/20 8:33 PM, Hamilton Tobon Mosquera wrote:
>> > Hi Johannes,
>> >
>> > I've been thinking on how to implement a solution for the
problem and
>> > I have some questions:
>> >
>> > 1. You mention in the problem description that the current
>> > asynchronous functions can be used, and probably modified. The
problem
>> > is that those runtime functions with _nowait at the end are not
>> > asynchronous. Looking at their implementations, they just wait for
>> > other tasks is there are pending tasks, and then call its
synchronous
>> > versions. So, is it a good idea to wrap them in functions that call
>> > them as asynchronous (using std::async), then return an object
to wait
>> > on?. Then, waiting on the object returned.
>>
>> Take a look at D77005. Shilei introduced some real askync versions for a
>> different reason already. You can build on top of that patch and extend
>> it if needed further.
>>
>>
>> > 2. I'm thinking on replacing the data transfer inside
>> > __tgt_target_teams with __tgt_target_data_begin. The problem
with this
>> > is that __tgt_target_data_begin does not initialize [first]private
>> > variables, and doesn't check for lambda mappings. Therefore, my idea
>> > to go around this problem is to create another wrapper function F,
>> > that calls __tgt_target_data_begin, and executes the necessary code
>> > for lambda mappings check and [first]private variables, and finally,
>> > calling F as the asynchronous function. What is good about this, is
>> > that the code concerning data transfer inside __tgt_target_teams can
>> > be replaced with F.
>>
>> Interesting. I'll need to see small examples. For now, focus on the
>> simple case, we'll get to the rest later. However, we should really
>> start by creating test cases that show the initial code and FIXMEs that
>> describe how we want it to look like.
>>
>>
>> > 3. Also, I was wondering if I must to be aware of (split them into
>> > issue and wait) all the other constructs that imply data transfers
>> > (update, data enter/exit), or just focus on
__tgt_target[_nowait] and
>> > __tgt_target_teams[_nowait].
>>
>> We want to eventually split all transfers into two but let's start with
>> a single one.
>>
>>
>> > 4. This might be a dumb question, but just to make sure. Do I
have to
>> > move the wait call into the offloaded region just before the data is
>> > used (because I think this would imply analyzing the offloaded
>> > bitcode, which is in another module)?, or move it just before the
>> > kernel is executed?.
>>
>> We split, then we move them apart. The cannot be moved over instructions
>> that might change behavior if we move them, e.g. an aliasing memory
>> operation or a kernel call that uses the data.
>>
>>
>> > 5. Do you have a template for the GSoC proposal. That is, is it
plain
>> > text or pdf or ...?. Also, do you have sort of a structure that we
>> > have to follow?, for example, Abstract -> Benefits -> Deliverables
>> > ..., or do we have freedom on that?. Your post in hte GSoC page only
>> > mentions that we must include our background, but nothing about the
>> > format of the proposal.
>>
>> I do not have one. I thought they might or they have an FAQ that
>> describes what to do. I know they have some required things, so check
>> their webpage. I think you have to use google docs, I might be wrong.
>> Your categories look good, make the deliverables not too specific but
>> describe more ideas to work on. We'll make tasks as we go as you are not
>> the only one working on this general area.
>>
>> Feel free to send me a draft of the proposal for feedback.
>>
>> Cheers,
>> Johannes
>>
>> > Thank you.
>> >
>> > Hamilton.
>> >
>> >
>> > On``` 25/03/20 11:41 a. m., Doerfert, Johannes wrote:
>> >> On 3/25/20 5:51 AM, Hamilton Tobon Mosquera wrote:
>> >> > Hi Johannes,
>> >> >
>> >> > Sorry about the failing tests. I completely forgot about
running all
>> >> > of them, I only ran the tests for the openmp ipo transforms.
>> >>
>> >> No worries, it happens.
>> >>
>> >>
>> >> > I found the GH issue in cache. I can post it here if you want.
>> >>
>> >> Yes, please.
>> >>
>> >>
>> >> > I analyzed these runtime calls,
__tgt_target_teams_[nowait]. What I
>> >> > don't understand about the problem we want to solve
(splitting the
>> >> > memory transfer into issue and wait and legally moving code
>> inside) is
>> >> > that the memory transfer is made inside those runtime calls.
>> >> > Therefore, the runtime calls to the memory transfer cannot be
>> analyzed
>> >> > in the IR. Could you please explain a bit further if the memory
>> >> > transfer should split in the IR? or split
>> __tgt_target_teams_[nowait]
>> >> > in such a way that the memory transfer is made in the first
>> part, and
>> >> > the wait in the second part.
>> >>
>> >> Exactly what you said in the last sentence. Split the runtime
call into
>> >> two, issue and wait. Then we move issue "up" the execution path
and wait
>> >> "down".
>> >>
>> >> Cheers,
>> >> Johannes
>> >>
>> >>
>> >> > Thanks.
>> >> >
>> >> > Hamilton.
>> >> >
>> >> > On 23/03/20 2:21 p. m., Doerfert, Johannes wrote:
>> >> >>
>> >> >> On 3/23/20 11:22 AM, Hamilton Tobon Mosquera wrote:
>> >> >> > Hi Johannes,
>> >> >> >
>> >> >> > Yes, I'm highly interested, I already started. It
would be nice
>> >> if you
>> >> >> > post the details again. I didn't take note of them, I was
>> always
>> >> >> > looking at the issue in GH.
>> >> >>
>> >> >> I asked if we can make the readonly but unsure yet. I can
write
>> it again
>> >> >> but it'll take ma some time.
>> >> >>
>> >> >>
>> >> >> > The problem I'm facing right now is this:
>> >> >> > The first task is identifying OpenMP API calls referred to
>> >> device memory
>> >> >> > allocation. I first understood how the compiler driver
>> >> orchestrates the
>> >> >> > process of offloading OpenMP regions to devices, and
now I'm
>> >> looking at
>> >> >> > the step of the pipeline that generates LLVM IR for both
>> host and
>> >> >> > device. I wrote a simple C program that uses OpenMP to
map a
>> >> local array
>> >> >> > to the device main memory. Then I'm looking at the
device and
>> >> host LLVM
>> >> >> > IR representation of this program, but I can't find any
>> runtime call
>> >> >> > referred to device memory allocation. In the host IR I see
>> that the
>> >> >> > array is passed to the outlined function and stored in a
>> >> register inside
>> >> >> > the outlined function, but there's no memory
allocation runtime
>> >> call.
>> >> >> > And in the device IR the array is passed to the main
offloading
>> >> >> > function.
>> >> >> > Any suggestion or documentation on how that memory
transfer is
>> >> >> > achieved?, and how to track its API calls. It might be
that
>> I'm not
>> >> >> > using the proper omp directive, so here is C code:
>> >> >>
>> >> >> Take a look at
>> >>
>>
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>> >> , the mapping request,
>> >> >>
>> >> >> which may or may not cause data-transfers, are part of the
call to
>> >> >> __tgt_target_teams[_nowait] and
>> __tgt_target_data_update[_nowait]. Start
>> >> >> by reading the impl. of those two functions in the openmp
runtime
>> >> >> (llvm-project/openmp/...).
>> >> >>
>> >> >> Let me know if this helps and once you have new questions.
>> >> >>
>> >> >> Cheers,
>> >> >> Johannes
>> >> >>
>> >> >> P.S. I merged your first patch. You didn't run all test
before.
>> I did
>> >> >> and noticed that we failed one because of type mismatches.
>> Fixed them
>> >> >> before I merged your patch.
>> >> >>
>> >> >> >
>> >> >> > #include <omp.h>
>> >> >> > #include <stdio.h>
>> >> >> >
>> >> >> > #define size 1000000
>> >> >> > double a[size];
>> >> >> >
>> >> >> > int main() {
>> >> >> >
>> >> >> > #pragma omp target map(to: a[0:size])
>> >> >> > #pragma omp teams distribute
>> >> >> > for (int i = 0; i < size; ++i) {
>> >> >> > a[i] = a[i]*(i*i)/2;
>> >> >> > }
>> >> >> >
>> >> >> > return 0;
>> >> >> > }
>> >> >> >
>> >> >> >
>> >> >> > PD: The command to compile is this:
>> >> >> > clang -v -save-temps \
>> >> >> > -I/path/to/llvm/release/9.x/include -fopenmp \
>> >> >> > -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target \
>> >> >> > -march=sm_61 memory_transfer.c -o memory_transfer
>> >> >> >
>> >> >> > Thanks.
>> >> >> > Hamilton.
>> >> >> >
>> >> >> > On 23/03/20 11:11 a. m., Doerfert, Johannes wrote:
>> >> >> >> On 3/22/20 12:33 PM, Hamilton Tobon Mosquera wrote:
>> >> >> >> > Ahhh I understand. So I believe the project you
posted
>> is still
>> >> >> >> opened. Do you any advice on the question I posted
before?.
>> >> >> >>
>> >> >> >> Yes. Still open. You should use this as the main part of
>> the GSoC
>> >> >> >> proposal (if you are interested). Can you repeat the
question?
>> >> >> >>
>> >> >> >> >
>> >> >> >> > Thank you.
>> >> >> >> >
>> >> >> >> > On 22/03/20 1:26 p. m., Doerfert, Johannes wrote:
>> >> >> >> >> I did not. The issues sections on GH was removed.
>> >> >> >> >>
>> >> >> >> >> ________________________________________
>> >> >> >> >> From: Hamilton Tobon Mosquera <htobonm at eafit.edu.co>
>> >> >> >> >> Sent: Sunday, March 22, 2020 12:21
>> >> >> >> >> To: llvm-dev at lists.llvm.org
>> >> >> >> >> Cc: Doerfert, Johannes
>> >> >> >> >> Subject: Re: [llvm-dev] GSoC Interested student
>> >> >> >> >>
>> >> >> >> >> Hi there Johannes!,
>> >> >> >> >>
>> >> >> >> >> I was checking out the issue (about latency
hiding when
>> >> >> transferring
>> >> >> >> >> memory from host to device) you posted about a week
>> ago, but
>> >> >> it's not
>> >> >> >> >> there anymore. Did you remove it?.
>> >> >> >> >>
>> >> >> >> >> Thanks.
>> >> >> >> >>
>> >> >> >> >> Hamilton.
>> >> >> >> >>
>> >> >> >> >> On 21/03/20 10:04 p. m., Hamilton Tobon Mosquera via
>> llvm-dev
>> >> >> wrote:
>> >> >> >> >>> Hi there!,
>> >> >> >> >>>
>> >> >> >> >>> Right now I'm starting with the project proposed by
>> >> Johannes here:
>> >> >> >> >>>
>> >> >> >>
>> >> >>
>> >>
>>
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>> >> >> >> >>>
>> >> >> >> >>>
>> >> >> >> >>> The first task is identifying OpenMP API calls
referred
>> >> to device
>> >> >> >> memory
>> >> >> >> >>> allocation. I first understood how the compiler
driver
>> >> >> orchestrates the
>> >> >> >> >>> process of offloading OpenMP regions to
devices, and
>> now I'm
>> >> >> looking at
>> >> >> >> >>> the step of the pipeline that generates LLVM IR
for both
>> >> host and
>> >> >> >> >>> device. I wrote a simple C program that uses
OpenMP to
>> >> map a local
>> >> >> >> array
>> >> >> >> >>> to the device main memory. Then I'm looking at the
>> device and
>> >> >> host LLVM
>> >> >> >> >>> IR representation of this program, but I can't
find any
>> >> >> runtime call
>> >> >> >> >>> referred to device memory allocation. In the
host IR
>> I see
>> >> >> that the
>> >> >> >> >>> array is passed to the outlined function and
stored in a
>> >> register
>> >> >> >> inside
>> >> >> >> >>> the outlined function, but there's no memory
allocation
>> >> >> runtime call.
>> >> >> >> >>> And in the device IR the array is passed to the
main
>> >> offloading
>> >> >> >> >>> function. Any suggestion or documentation on how
>> that memory
>> >> >> >> transfer is
>> >> >> >> >>> achieved?, and how to track its API calls. It might
>> be that
>> >> >> I'm not
>> >> >> >> >>> using the proper omp directive, so here is C code:
>> >> >> >> >>>
>> >> >> >> >>>
>> >> >> >> >>> #include <omp.h>
>> >> >> >> >>> #include <stdio.h>
>> >> >> >> >>>
>> >> >> >> >>> #define size 1000000
>> >> >> >> >>> double a[size];
>> >> >> >> >>>
>> >> >> >> >>> int main() {
>> >> >> >> >>>
>> >> >> >> >>> #pragma omp target map(to: a[0:size])
>> >> >> >> >>> #pragma omp teams distribute
>> >> >> >> >>> for (int i = 0; i < size; ++i) {
>> >> >> >> >>> a[i] = a[i]*(i*i)/2;
>> >> >> >> >>> }
>> >> >> >> >>> return 0;
>> >> >> >> >>>
>> >> >> >> >>> PD: The command to compile is this: clang -v
-save-temps
>> >> >> >> >>> -I/path/to/llvm/release/9.x/include -fopenmp
>> >> >> >> >>> -fopenmp-targets=nvptx64-nvidia-cuda
-Xopenmp-target
>> >> -march=sm_61
>> >> >> >> >>> memory_transfer.c -o memory_transfer
>> >> >> >> >>>
>> >> >> >> >>> Thank you all.
>> >> >> >> >>>
>> >> >> >> >>> Hamilton.
>> >> >> >> >>>
>> >> >> >> >>>
>> >> >> >> >>> On 18/03/20 9:21 p. m., Doerfert, Johannes wrote:
>> >> >> >> >>>> Hi Hamilton,
>> >> >> >> >>>>
>> >> >> >> >>>> I personally don't believe the effort to make
the IR
>> >> >> >> >>>> "parallelism-aware" is worth it right now.
>> >> >> >> >>>> What I propose is something else, see for example
>> >> >> >> >>>>
>> >> >> >>
>> >> >>
>> >>
>>
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>> >> >> >> >>>> and the OpenMPOpt pass.
>> >> >> >> >>>> There are multiple bigger tasks towards better
>> >> offloading, one of
>> >> >> >> >>>> which is described here
>> >> >> >> >>>>
>> >> >> >>
>> >> >>
>> >>
>>
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>> >> >> >> >>>> It might be interesting to add the transfer
>> functions used
>> >> >> for memory
>> >> >> >> >>>> transfer to the OMPKinds.def file so they are
known
>> in the
>> >> >> >> >>>> OpenMPOpt.cpp pass.
>> >> >> >> >>>> Another small task would be to eliminate trivially
>> redundant
>> >> >> ones,
>> >> >> >> >>>> that is if you have copy X from A to B directly
>> followed by
>> >> >> copy X
>> >> >> >> >>>> from B to A, remove both.
>> >> >> >> >>>>
>> >> >> >> >>>> Does this make sense?
>> >> >> >> >>>>
>> >> >> >> >>>> Cheers,
>> >> >> >> >>>> Johannes
>> >> >> >> >>>>
>> >> >> >> >>>>
>> >> >> >> >>>>
>> >> >> >> >>>>
>> >> >> >> >>>>
>> >> >> >> >>>> ---------------------------------------
>> >> >> >> >>>> Johannes Doerfert
>> >> >> >> >>>> Researcher
>> >> >> >> >>>>
>> >> >> >> >>>> Argonne National Laboratory
>> >> >> >> >>>> Lemont, IL 60439, USA
>> >> >> >> >>>>
>> >> >> >> >>>> jdoerfert at anl.gov
>> >> >> >> >>>>
>> >> >> >> >>>> ________________________________________
>> >> >> >> >>>> From: Hamilton Tobon Mosquera
<htobonm at eafit.edu.co>
>> >> >> >> >>>> Sent: Wednesday, March 18, 2020 19:14
>> >> >> >> >>>> To: llvm-dev at lists.llvm.org
>> >> >> >> >>>> Cc: Doerfert, Johannes
>> >> >> >> >>>> Subject: Re: [llvm-dev] GSoC Interested student
>> >> >> >> >>>>
>> >> >> >> >>>> Hi there!,
>> >> >> >> >>>>
>> >> >> >> >>>> I think I'm done with this patch: D76058. If
that is
>> >> everything
>> >> >> >> >>>> concerning that, could you please assign me
another
>> task.
>> >> >> >> >>>>
>> >> >> >> >>>> I've been reading about Concurrent Control
Flow Graphs,
>> >> which
>> >> >> would
>> >> >> >> >>>> be awesome for LLVM because it would be kind of a
>> starting
>> >> >> point for
>> >> >> >> >>>> optimizations for parallel programs in
general. The
>> thing is
>> >> >> that it
>> >> >> >> >>>> seems more complicated than it is presented in the
>> papers, I
>> >> >> think
>> >> >> >> >>>> that's why it's not implemented in LLVM yet. So, I
>> think
>> >> I'll try
>> >> >> >> >>>> searching for something else. Nevertheless,
don't you
>> >> think that
>> >> >> >> >>>> implementing this is worth the effort?. The
papers I'm
>> >> >> reading are
>> >> >> >> >>>> from 1990s, I don't understand why they aren't
widely
>> >> >> implemented in
>> >> >> >> >>>> big compilers xd.
>> >> >> >> >>>>
>> >> >> >> >>>> I saw this commit from you:
>> >> >> >> >>>>
>> >> >> >>
>> >> >>
>> >>
>>
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>> >> >> >> >>>> Is there something I can help with concerning
this?.
>> >> >> >> >>>>
>> >> >> >> >>>> I would like to do contribute to the OpenMP target
>> >> offloading. Is
>> >> >> >> >>>> there anything I can help with?.
>> >> >> >> >>>>
>> >> >> >> >>>> On 11/03/20 8:51 a. m., Hamilton Tobon
Mosquera via
>> llvm-dev
>> >> >> wrote:
>> >> >> >> >>>>
>> >> >> >> >>>> Hi there!,
>> >> >> >> >>>>
>> >> >> >> >>>> As part of my application process to the next
GSoC I'm
>> >> >> working on the
>> >> >> >> >>>> TODO in OpenMPOpt.cpp line 437:
>> >> >> >> >>>>
>> >> >> >> >>>> // TODO: We should validate the declaration
>> agains the
>> >> >> types we
>> >> >> >> >>>> expect.
>> >> >> >> >>>>
>> >> >> >> >>>> Link:
>> >> >> >> >>>>
>> >> >> >>
>> >> >>
>> >>
>>
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>> >> >> >> >>>>
>> >> >> >> >>>> I have a question. When there is a mismatch in the
>> types
>> >> >> (return type
>> >> >> >> >>>> or argument types) between the function
declaration
>> >> found and the
>> >> >> >> >>>> runtime library function, what should I do?.
Show an
>> >> error or a
>> >> >> >> >>>> warning?, continuing with the pass or exiting the
>> program?.
>> >> >> >> >>>>
>> >> >> >> >>>> Thanks.
>> >> >> >> >>>>
>> >> >> >> >>>>
>> >> >> >> >>>> On 10/03/20 7:12 p. m., Stefanos Baziotis wrote:
>> >> >> >> >>>> Hi Hamilton,
>> >> >> >> >>>>
>> >> >> >> >>>> Thanks for your interest in LLVM!
>> >> >> >> >>>>
>> >> >> >> >>>> IMHO you have a good start. I'll try to help
by CC'ing
>> >> >> Johannes. Note
>> >> >> >> >>>> that it's difficult for LLVM developers
>> >> >> >> >>>> (including GSoC mentors and including Johannes) to
>> keep up
>> >> >> with every
>> >> >> >> >>>> discussion on llvm-dev.
>> >> >> >> >>>> So, you can CC them to make their life easier. :)
>> >> >> >> >>>>
>> >> >> >> >>>> Johannes, I see a lot of people interested in this
>> project.
>> >> >> Maybe a
>> >> >> >> >>>> list of starting points, patches etc.
>> >> >> >> >>>> could help.
>> >> >> >> >>>>
>> >> >> >> >>>> Best,
>> >> >> >> >>>> Stefanos
>> >> >> >> >>>>
>> >> >> >> >>>> Στις Τρί, 10 Μαρ 2020 στις 1:04 π.μ., ο/η Hamilton
>> Tobon
>> >> >> Mosquera via
>> >> >> >> >>>> llvm-dev
>> >> >> <llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>>
>> >> >> >> >>>> έγραψε:
>> >> >> >> >>>> Greetings,
>> >> >> >> >>>>
>> >> >> >> >>>>
>> >> >> >> >>>> I'm an LLVM newcomer interested in
participating in the
>> >> next GSoC
>> >> >> >> under
>> >> >> >> >>>> the project "Improve parallelism-aware
analyses and
>> >> >> >> optimizations". I've
>> >> >> >> >>>> already read "Compiler Optimizations for
OpenMP" and
>> >> "Compiler
>> >> >> >> >>>> Optimizations for Parallel Programs" both by
Doerfert
>> >> and Finkel.
>> >> >> >> Also,
>> >> >> >> >>>> I've watched their two LLVM meeting developers
>> conferences
>> >> >> >> "Representing
>> >> >> >> >>>> parallelism within LLVM" and "Optimizing
>> indirections, using
>> >> >> >> >>>> abstractions without ...", so I have some
>> background in the
>> >> >> problems
>> >> >> >> >>>> they are trying to tackle. Also, I'm close to
solve
>> one of
>> >> >> the bugs
>> >> >> >> >>>> posted in bugzilla, which has given me a broader
>> idea of
>> >> how the
>> >> >> >> OpenMP
>> >> >> >> >>>> pragmas are translated. The bus is this:
>> >> >> >> >>>>
>> >> >> >>
>> >> >>
>> >>
>>
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>> >> >> >> >>>>
>> >> >> >> >>>>
>> >> >> >> >>>> I tried contacting you Johannes but with your
>> Argonne email,
>> >> >> I suppose
>> >> >> >> >>>> that's why you couldn't answer. Could you tell
me more
>> >> about the
>> >> >> >> >>>> project?, what variants do you have?, or what
can I
>> focus my
>> >> >> >> application
>> >> >> >> >>>> on?. Should I start with what you recommended to
>> Emanuel?.
>> >> >> >> >>>>
>> >> >> >> >>>> Thank you.
>> >> >> >> >>>>
>> >> >> >> >>>> _______________________________________________
>> >> >> >> >>>> LLVM Developers mailing list
>> >> >> >> >>>>
llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>
>> >> >> >> >>>>
>> >> >> >>
>> >> >>
>> >>
>>
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>> >> >> >> >>>>
>> >> >> >> >>>> La información contenida en este correo
electrónico
>> está
>> >> dirigida
>> >> >> >> >>>> únicamente a su destinatario y puede contener
>> información
>> >> >> >> >>>> confidencial, material privilegiado o información
>> >> protegida por
>> >> >> >> >>>> derecho de autor. Está prohibida cualquier copia,
>> >> utilización,
>> >> >> >> >>>> indebida retención, modificación, difusión,
>> distribución o
>> >> >> >> >>>> reproducción total o parcial. Si usted recibe este
>> mensaje
>> >> >> por error,
>> >> >> >> >>>> por favor contacte al remitente y elimínelo. La
>> >> información aquí
>> >> >> >> >>>> contenida es responsabilidad exclusiva de su
remitente
>> >> por lo
>> >> >> tanto
>> >> >> >> >>>> la Universidad EAFIT no se hace responsable de lo
>> que el
>> >> mensaje
>> >> >> >> >>>> contenga. The information contained in this
email is
>> >> >> addressed to its
>> >> >> >> >>>> recipient only and may contain confidential
>> information,
>> >> >> privileged
>> >> >> >> >>>> material or information protected by
copyright. Its
>> >> >> prohibited any
>> >> >> >> >>>> copy, use, improper retention, modification,
>> dissemination,
>> >> >> >> >>>> distribution or total or partial reproduction.
If you
>> >> receive
>> >> >> this
>> >> >>�� >> >>>> message by error, please contact the sender
and delete
>> >> it. The
>> >> >> >> >>>> information contained herein is the sole
>> responsibility of
>> >> >> the sender
>> >> >> >> >>>> therefore Universidad EAFIT is not responsible for
>> what the
>> >> >> message
>> >> >> >> >>>> contains.
>> >> >> >> >>>> La información contenida en este correo
electrónico
>> está
>> >> dirigida
>> >> >> >> >>>> únicamente a su destinatario y puede contener
>> información
>> >> >> >> >>>> confidencial, material privilegiado o información
>> >> protegida por
>> >> >> >> >>>> derecho de autor. Está prohibida cualquier copia,
>> >> utilización,
>> >> >> >> >>>> indebida retención, modificación, difusión,
>> distribución o
>> >> >> >> >>>> reproducción total o parcial. Si usted recibe este
>> mensaje
>> >> >> por error,
>> >> >> >> >>>> por favor contacte al remitente y elimínelo. La
>> >> información aquí
>> >> >> >> >>>> contenida es responsabilidad exclusiva de su
remitente
>> >> por lo
>> >> >> tanto
>> >> >> >> >>>> la Universidad EAFIT no se hace responsable de lo
>> que el
>> >> mensaje
>> >> >> >> >>>> contenga. The information contained in this
email is
>> >> >> addressed to its
>> >> >> >> >>>> recipient only and may contain confidential
>> information,
>> >> >> privileged
>> >> >> >> >>>> material or information protected by
copyright. Its
>> >> >> prohibited any
>> >> >> >> >>>> copy, use, improper retention, modification,
>> dissemination,
>> >> >> >> >>>> distribution or total or partial reproduction.
If you
>> >> receive
>> >> >> this
>> >> >> >> >>>> message by error, please contact the sender
and delete
>> >> it. The
>> >> >> >> >>>> information contained herein is the sole
>> responsibility of
>> >> >> the sender
>> >> >> >> >>>> therefore Universidad EAFIT is not responsible for
>> what the
>> >> >> message
>> >> >> >> >>>> contains.
>> >> >> >> >>>>
>> >> >> >> >>>>
>> >> >> >> >>>> _______________________________________________
>> >> >> >> >>>> LLVM Developers mailing list
>> >> >> >> >>>>
llvm-dev at lists.llvm.org<mailto:llvm-dev at lists.llvm.org>
>> >> >> >> >>>>
>> >> >> >>
>> >> >>
>> >>
>>
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>> >> >> >> >>>>
>> >> >> >> >>>>
>> >> >> >> >>>> La información contenida en este correo
electrónico
>> está
>> >> dirigida
>> >> >> >> >>>> únicamente a su destinatario y puede contener
>> información
>> >> >> >> >>>> confidencial, material privilegiado o información
>> >> protegida por
>> >> >> >> >>>> derecho de autor. Está prohibida cualquier copia,
>> >> utilización,
>> >> >> >> >>>> indebida retención, modificación, difusión,
>> distribución o
>> >> >> >> >>>> reproducción total o parcial. Si usted recibe este
>> mensaje
>> >> >> por error,
>> >> >> >> >>>> por favor contacte al remitente y elimínelo. La
>> >> información aquí
>> >> >> >> >>>> contenida es responsabilidad exclusiva de su
remitente
>> >> por lo
>> >> >> tanto
>> >> >> >> >>>> la Universidad EAFIT no se hace responsable de lo
>> que el
>> >> mensaje
>> >> >> >> >>>> contenga. The information contained in this
email is
>> >> >> addressed to its
>> >> >> >> >>>> recipient only and may contain confidential
>> information,
>> >> >> privileged
>> >> >> >> >>>> material or information protected by
copyright. Its
>> >> >> prohibited any
>> >> >> >> >>>> copy, use, improper retention, modification,
>> dissemination,
>> >> >> >> >>>> distribution or total or partial reproduction.
If you
>> >> receive
>> >> >> this
>> >> >> >> >>>> message by error, please contact the sender
and delete
>> >> it. The
>> >> >> >> >>>> information contained herein is the sole
>> responsibility of
>> >> >> the sender
>> >> >> >> >>>> therefore Universidad EAFIT is not responsible for
>> what the
>> >> >> message
>> >> >> >> >>>> contains.
>> >> >> >> >>> _______________________________________________
>> >> >> >> >>> LLVM Developers mailing list
>> >> >> >> >>> llvm-dev at lists.llvm.org
>> >> >> >> >>>
>> >> >> >>
>> >> >>
>> >>
>>
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>> >> >> >> >>>
>> >> >> >> >>> La información contenida en este correo
electrónico está
>> >> dirigida
>> >> >> >> >>> únicamente a su destinatario y puede contener
>> información
>> >> >> >> >>> confidencial, material privilegiado o información
>> >> protegida por
>> >> >> >> >>> derecho de autor. Está prohibida cualquier copia,
>> >> utilización,
>> >> >> >> >>> indebida retención, modificación, difusión,
>> distribución o
>> >> >> >> >>> reproducción total o parcial. Si usted recibe este
>> >> mensaje por
>> >> >> error,
>> >> >> >> >>> por favor contacte al remitente y elimínelo. La
>> >> información aquí
>> >> >> >> >>> contenida es responsabilidad exclusiva de su
>> remitente por lo
>> >> >> tanto la
>> >> >> >> >>> Universidad EAFIT no se hace responsable de lo que
>> el mensaje
>> >> >> >> >>> contenga. The information contained in this
email is
>> >> addressed
>> >> >> to its
>> >> >> >> >>> recipient only and may contain confidential
information,
>> >> >> privileged
>> >> >> >> >>> material or information protected by copyright. Its
>> >> prohibited any
>> >> >> >> >>> copy, use, improper retention, modification,
>> dissemination,
>> >> >> >> >>> distribution or total or partial reproduction.
If you
>> >> receive this
>> >> >> >> >>> message by error, please contact the sender and
delete
>> >> it. The
>> >> >> >> >>> information contained herein is the sole
responsibility
>> >> of the
>> >> >> sender
>> >> >> >> >>> therefore Universidad EAFIT is not responsible for
>> what the
>> >> >> message
>> >> >> >> >>> contains.
>> >> >> >> >> La información contenida en este correo
electrónico está
>> >> dirigida
>> >> >> >> únicamente a su destinatario y puede contener información
>> >> confidencial,
>> >> >> >> material privilegiado o información protegida por
derecho de
>> >> autor. Está
>> >> >> >> prohibida cualquier copia, utilización, indebida
retención,
>> >> >> >> modificación, difusión, distribución o reproducción
total o
>> >> parcial. Si
>> >> >> >> usted recibe este mensaje por error, por favor
contacte al
>> >> remitente y
>> >> >> >> elimínelo. La información aquí contenida es
responsabilidad
>> >> exclusiva de
>> >> >> >> su remitente por lo tanto la Universidad EAFIT no se hace
>> >> responsable de
>> >> >> >> lo que el mensaje contenga. The information contained
in this
>> >> email is
>> >> >> >> addressed to its recipient only and may contain
confidential
>> >> >> >> information, privileged material or information
protected by
>> >> copyright.
>> >> >> >> Its prohibited any copy, use, improper retention,
>> modification,
>> >> >> >> dissemination, distribution or total or partial
reproduction.
>> >> If you
>> >> >> >> receive this message by error, please contact the
sender and
>> >> delete it.
>> >> >> >> The information contained herein is the sole
>> responsibility of the
>> >> >> >> sender therefore Universidad EAFIT is not responsible for
>> what the
>> >> >> >> message contains.
>> >> >> >> >
>> >> >> >>
>> >> >> >>
>> >> >> >> La información contenida en este correo electrónico está
>> dirigida
>> >> >> únicamente a su destinatario y puede contener información
>> confidencial,
>> >> >> material privilegiado o información protegida por derecho de
>> autor. Está
>> >> >> prohibida cualquier copia, utilización, indebida retención,
>> >> >> modificación, difusión, distribución o reproducción total o
>> parcial. Si
>> >> >> usted recibe este mensaje por error, por favor contacte al
>> remitente y
>> >> >> elimínelo. La información aquí contenida es responsabilidad
>> exclusiva de
>> >> >> su remitente por lo tanto la Universidad EAFIT no se hace
>> responsable de
>> >> >> lo que el mensaje contenga. The information contained in this
>> email is
>> >> >> addressed to its recipient only and may contain confidential
>> >> >> information, privileged material or information protected by
>> copyright.
>> >> >> Its prohibited any copy, use, improper retention,
modification,
>> >> >> dissemination, distribution or total or partial reproduction.
>> If you
>> >> >> receive this message by error, please contact the sender and
>> delete it.
>> >> >> The information contained herein is the sole
responsibility of the
>> >> >> sender therefore Universidad EAFIT is not responsible for
what the
>> >> >> message contains.
>> >> >> >
>> >> >>
>> >> >>
>> >> >> La información contenida en este correo electrónico está
dirigida
>> >> únicamente a su destinatario y puede contener información
confidencial,
>> >> material privilegiado o información protegida por derecho de
autor. Está
>> >> prohibida cualquier copia, utilización, indebida retención,
>> >> modificación, difusión, distribución o reproducción total o
parcial. Si
>> >> usted recibe este mensaje por error, por favor contacte al
remitente y
>> >> elimínelo. La información aquí contenida es responsabilidad
exclusiva de
>> >> su remitente por lo tanto la Universidad EAFIT no se hace
responsable de
>> >> lo que el mensaje contenga. The information contained in this
email is
>> >> addressed to its recipient only and may contain confidential
>> >> information, privileged material or information protected by
copyright.
>> >> Its prohibited any copy, use, improper retention, modification,
>> >> dissemination, distribution or total or partial reproduction.
If you
>> >> receive this message by error, please contact the sender and
delete it.
>> >> The information contained herein is the sole responsibility of the
>> >> sender therefore Universidad EAFIT is not responsible for what the
>> >> message contains.
>> >> >
>> >>
>> >>
>> >> La información contenida en este correo electrónico está dirigida
>> únicamente a su destinatario y puede contener información confidencial,
>> material privilegiado o información protegida por derecho de autor. Está
>> prohibida cualquier copia, utilización, indebida retención,
>> modificación, difusión, distribución o reproducción total o parcial. Si
>> usted recibe este mensaje por error, por favor contacte al remitente y
>> elimínelo. La información aquí contenida es responsabilidad exclusiva de
>> su remitente por lo tanto la Universidad EAFIT no se hace responsable de
>> lo que el mensaje contenga. The information contained in this email is
>> addressed to its recipient only and may contain confidential
>> information, privileged material or information protected by copyright.
>> Its prohibited any copy, use, improper retention, modification,
>> dissemination, distribution or total or partial reproduction. If you
>> receive this message by error, please contact the sender and delete it.
>> The information contained herein is the sole responsibility of the
>> sender therefore Universidad EAFIT is not responsible for what the
>> message contains.
>> >
>>
>>
>> La información contenida en este correo electrónico está dirigida
únicamente a su destinatario y puede contener información confidencial,
material privilegiado o información protegida por derecho de autor. Está
prohibida cualquier copia, utilización, indebida retención,
modificación, difusión, distribución o reproducción total o parcial. Si
usted recibe este mensaje por error, por favor contacte al remitente y
elimínelo. La información aquí contenida es responsabilidad exclusiva de
su remitente por lo tanto la Universidad EAFIT no se hace responsable de
lo que el mensaje contenga. The information contained in this email is
addressed to its recipient only and may contain confidential
information, privileged material or information protected by copyright.
Its prohibited any copy, use, improper retention, modification,
dissemination, distribution or total or partial reproduction. If you
receive this message by error, please contact the sender and delete it.
The information contained herein is the sole responsibility of the
sender therefore Universidad EAFIT is not responsible for what the
message contains.
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