[LLVMdev] llvm get annotations

[Alexandru Ionut Diaconescu]

Hi, I solved it. From the ConstantStruct you can call getOperand() multiple
times, so "mine" as deep as you can.

On Fri, Mar 1, 2013 at 1:41 PM, Alexandru Ionut Diaconescu <
alexandruionutdiaconescu at gmail.com> wrote:

>
> Hi Sebastian,
>
> Thanks for the response.
>
> I already did this :
>
> I cast the entire annotated expression to Value*. Then, in order to avoid
> ugly things like getAsString(), I check if V->getValueID() ==
> Value::ConstantArrayVal in order to cast it to ConstantArray. Because it
> contains only array[0], I cast array0>getOperand(0) to ConstantStruct.
> Therefore, from ConstantStruct you can get all the four operands. Now, as
> a TODO, is only to get the names of @f, @str from every field.
>
> But right now I have only a small step to do.
> ConstantStruct->getOperand(0) gives me   i8* bitcast (i32* @f to i8*)  . Do
> you know how I can get the name @f from this? I cannot convert it again to
> ConstantStruct and follow the same procedure, it will give me a segfault.
>
> Thank you again. Your advice was very helpful :)
>
>
>
> On Fri, Mar 1, 2013 at 9:22 AM, Sebastian Dreßler <dressler at zib.de> wrote:
>
>> Hi,
>>
>> On 02/28/2013 03:55 PM, Alexandru Ionut Diaconescu wrote:
>> > Hi Sebastian,
>> >
>> > I think I am very close to get the annotation, but I need to parse a
>> > Value*, which is of type  {[1 x { i8*, i8*, i8*, i32 }]. In one of those
>> > fields is the variable that I'm interested into and the string keeping
>> the
>> > annotation. But I don't know how to parse .... use_begin() gives me the
>> > same Value*....do you know how I can parse inside the element?
>> >
>>
>> This is an Array Type (http://llvm.org/docs/LangRef.html#array-type)
>> which contains a struct. I assume, that you could cast to ConstantArray
>> which is a Value and then use getOperand(0) and cast its result to
>> ConstantStruct, like I've done in the sample code. Then you have the
>> struct and you can traverse it further.
>>
>>
>> Cheers,
>> Sebastian
>>
>> > Thank you :) !
>> >
>> >
>> >
>> >
>> >
>> > On Wed, Feb 27, 2013 at 4:44 PM, Alexandru Ionut Diaconescu <
>> > alexandruionutdiaconescu at gmail.com> wrote:
>> >
>> >> Hi Sebastian,
>> >>
>> >> Thank you for the dummy file. I will try to understand and use it. I
>> guess
>> >> I have some problems with C++11. If I cannot solve by simple "parsing"
>> my
>> >> code for @llvm.global.annotations, I will ask you again.
>> >>
>> >> Cheers,
>> >> Alex
>> >>
>> >>
>> >> On Wed, Feb 27, 2013 at 4:34 PM, Sebastian Dreßler <dressler at zib.de
>> >wrote:
>> >>
>> >>> Hi Alexandru,
>> >>>
>> >>> On 02/27/2013 04:20 PM, Alexandru Ionut Diaconescu wrote:
>> >>>> [...]
>> >>>> Do you have a larger piece of code (maybe you have some dummy/test
>> >>>> examples) from your previous work with annotations? It would be very
>> >>> useful
>> >>>> :D
>> >>>>
>> >>>
>> >>> I've attached an example. But please be aware of:
>> >>>
>> >>> 1. It uses C++11 and cast (previously I simply replaced cast<> with
>> >>> dynamic_cast<> which does not seem to work everywhere, so sorry for
>> that).
>> >>>
>> >>> 2. assert is not used in the style as it should be used, so pleas do
>> not
>> >>> adopt this style.
>> >>>
>> >>>
>> >>> If some things are still unclear, keep asking ;)
>> >>>
>> >>> Cheers,
>> >>> Sebastian
>> >>>
>> >>>
>> >>> --
>> >>> Mit freundlichen Grüßen / Kind regards
>> >>>
>> >>> Sebastian Dreßler
>> >>>
>> >>> Zuse Institute Berlin (ZIB)
>> >>> Takustraße 7
>> >>> D-14195 Berlin-Dahlem
>> >>> Germany
>> >>>
>> >>> dressler at zib.de
>> >>> Phone: +49 30 84185-261
>> >>>
>> >>> http://www.zib.de/
>> >>>
>> >>
>> >>
>> >>
>> >> --
>> >> Best regards,
>> >> Alexandru Ionut Diaconescu
>> >>
>> >
>> >
>> >
>>
>>
>> --
>> Mit freundlichen Grüßen / Kind regards
>>
>> Sebastian Dreßler
>>
>> Zuse Institute Berlin (ZIB)
>> Takustraße 7
>> D-14195 Berlin-Dahlem
>> Germany
>>
>> dressler at zib.de
>> Phone: +49 30 84185-261
>>
>> http://www.zib.de/
>>
>
>
>
> --
> Best regards,
> Alexandru Ionut Diaconescu
>



-- 
Best regards,
Alexandru Ionut Diaconescu
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20130301/e1db9681/attachment.html>