llvm dev - Jun 2014 - [LLVMdev] Not able to run pass

sir,
I am able to generate .bc file for other normal code but my problem how to
run the pass source code. If I write some pass then how should I run that
pass?

so please if you can help me in this and thanks for your reply.


On Thu, Jun 5, 2014 at 11:34 AM, Alexander Musman <
alexander.musman at gmail.com> wrote:
> You are trying to use the pass source code to generate .bc file, it would
> need all the flags/includes that used to build it.
> I suggest to start with something simpler for first .bc example, like:
>
> > cat > t.c
> int main() { return 1+2; }
>
> > clang -emit-llvm -c t.c -o hello.bc
>
>
> Regards,
> Alexander
>
>
> 2014-06-04 23:22 GMT+04:00 Prashanth Sharma <cs13m1017 at
iith.ac.in>:
>
> attaching  screenshot of errors I got
>>
>>
>> On Wed, Jun 4, 2014 at 11:07 PM, Prashanth Sharma <cs13m1017 at
iith.ac.in>
>> wrote:
>>
>>> sir,
>>> that I already applied this.As I followed these steps:-please tell
me
>>> whered did i go wrong?
>>>
>>>    1. Checkout LLVM:
>>>       - cd LLVM
>>>       - svn co http://llvm.org/svn/llvm-project/llvm/trunk llvm
>>>    2. Checkout Clang:
>>>       - cd LLVM
>>>       - cd llvm/tools
>>>       - svn co http://llvm.org/svn/llvm-project/cfe/trunk clang
>>>    3. Checkout Compiler-RT:
>>>       - cd LLVM
>>>       - cd llvm/projects
>>>       - svn co http://llvm.org/svn/llvm-project/compiler-rt/trunk
>>>       compiler-rt
>>>    4. Get the Test Suite Source Code
>>>       - cd LLVM
>>>       - cd llvm/projects
>>>       - svn co http://llvm.org/svn/llvm-project/test-suite/trunk
>>>       test-suite
>>>
>>>       5.Configure and build LLVM and Clang
>>>         mkdir build  (inside LLVM)
>>>         cd build
>>>         ../llvm/configure --prefix =/home/username/LLVM/build 
(path of
>>> build directory)
>>>            make -j4
>>>            make check-all
>>>       6.now went to Hello folder in lib/Transform/Hello
>>>             make (this create Hello.so in Debug+Asserts
>>>             clang -emit-llvm -c hello.c -o hello.bc ( Then this
gives me
>>> some file missing like Pass.h or some other that are already in
Include
>>> folder) or (if i give path using -I /path/to/these files/ it gives
me error
>>> in inside these file)
>>>
>>>
>>> Please sir, help me out.wasted so much time on this.and please tell
me
>>> all path variable or environment path that I have to set before
doing all
>>> this .And also tell me where did i went wrong?
>>>
>>>
>>>
>>> On Wed, Jun 4, 2014 at 9:08 PM, Alexander Musman <
>>> alexander.musman at gmail.com> wrote:
>>>
>>>> You can, for example, generate it with clang from some source
file:
>>>>
>>>> clang -emit-llvm -c hello.c -o hello.bc
>>>>
>>>> Regards,
>>>> Alexander
>>>>
>>>>
>>>> 2014-06-02 11:26 GMT+04:00 Prashanth Sharma <cs13m1017 at
iith.ac.in>:
>>>>
>>>>>  sir,
>>>>> As defined in
>>>>>
http://llvm.org/docs/WritingAnLLVMPass.html#setting-up-the-build-environment
>>>>>
>>>>> running pass with opt but here how I get hello.bc file .
>>>>>
>>>>> --
>>>>> Thanks
>>>>> Prashant Sharma
>>>>>
>>>>> _______________________________________________
>>>>> LLVM Developers mailing list
>>>>> LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
>>>>> http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
>>>>>
>>>>>
>>>>
>>>
>>>
>>> --
>>> Thanks
>>> Prashant Sharma
>>>
>>
>>
>>
>> --
>> Thanks
>> Prashant Sharma
>>
>
>

-- 
Thanks
Prashant Sharma
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On 5 June 2014 10:12, Prashanth Sharma <cs13m1017 at iith.ac.in>
wrote:
> sir,
> I am able to generate .bc file for other normal code but my problem how to
> run the pass source code. If I write some pass then how should I run that
> pass?
The answer is right there is the documentation

```
$ opt -load ../../../Debug+Asserts/lib/Hello.so -hello < hello.bc >
/dev/null
```

the ``-load`` flag loads your pass (which you built earlier) as a
plugin. Once loaded the ``-hello`` command line option becomes
available which will tell the opt tool to run that pass.

Also in future I would advise you to **not** send images of your
errors to the mailing list. It's a waste of space and you can easily
send the error messages to a file (e.g. ``clang -emit-llvm hello.cpp
2> errors.log`` ) and attach it instead which is much smaller and
easier to parse.

Thanks,
Dan.

Sir,
your answer put me in starting situation.As I told I am not able to
generate .bc file of hello.cpp(the pass file) as it is giving errors when I
use clang -emit-llvm -c hello.cpp -o hello.bc.So please if you can help me.



Thanks


On Fri, Jun 6, 2014 at 3:48 PM, Dan Liew <dan at su-root.co.uk> wrote:
> On 5 June 2014 10:12, Prashanth Sharma <cs13m1017 at iith.ac.in>
wrote:
> > sir,
> > I am able to generate .bc file for other normal code but my problem
how
> to
> > run the pass source code. If I write some pass then how should I run
that
> > pass?
>
> The answer is right there is the documentation
>
> ```
> $ opt -load ../../../Debug+Asserts/lib/Hello.so -hello < hello.bc >
> /dev/null
> ```
>
> the ``-load`` flag loads your pass (which you built earlier) as a
> plugin. Once loaded the ``-hello`` command line option becomes
> available which will tell the opt tool to run that pass.
>
> Also in future I would advise you to **not** send images of your
> errors to the mailing list. It's a waste of space and you can easily
> send the error messages to a file (e.g. ``clang -emit-llvm hello.cpp
> 2> errors.log`` ) and attach it instead which is much smaller and
> easier to parse.
>
> Thanks,
> Dan.
>


-- 
Thanks
Prashant Sharma
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