llvm dev - Mar 2015 - [LLVMdev] Use the IR information to modify the AST

Hi,guys:

I am try to get some information from the IR, such as Function type, Function
arguments,
I want to save then to the data structure which defined by myself, and I want
use the data structure to modify the
AST．
But I know ,the IR was produced by the AST,　I am not sure my thought is wright
or not.
If so, with API or function in the LLVM I will used? or some linkage or demo
that I can learn form?

Thanks,
Yao.
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Hi Yao,
> I am try to get some information from the IR, such as Function type,
> Function arguments,
> I want to save then to the data structure which defined by myself, and I
> want use the data structure to modify the
> AST．
> But I know ,the IR was produced by the AST,　I am not sure my thought is
> wright or not.
> If so, with API or function in the LLVM I will used? or some linkage or
demo
> that I can learn form?
  The frontend (clang) should be the right place to modify the AST.
The information
you want could be get from the frontend, too. You might refer [1] to
see the basic idea.

[1]
http://eli.thegreenplace.net/2012/06/08/basic-source-to-source-transformation-with-clang

HTH,
chenwj

-- 
Wei-Ren Chen (陳韋任)
Homepage: http://people.cs.nctu.edu.tw/~chenwj

Thanks a lot  :)
At 2015-03-06 09:40:04, "陳韋任" <chenwj.cs97g at g2.nctu.edu.tw>
wrote:
>Hi Yao,
>
>> I am try to get some information from the IR, such as Function type,
>> Function arguments,
>> I want to save then to the data structure which defined by myself, and
I
>> want use the data structure to modify the
>> AST．
>> But I know ,the IR was produced by the AST,　I am not sure my thought is
>> wright or not.
>> If so, with API or function in the LLVM I will used? or some linkage or
demo
>> that I can learn form?
>
>  The frontend (clang) should be the right place to modify the AST.
>The information
>you want could be get from the frontend, too. You might refer [1] to
>see the basic idea.
>
>[1]
http://eli.thegreenplace.net/2012/06/08/basic-source-to-source-transformation-with-clang
>
>HTH,
>chenwj
>
>-- 
>Wei-Ren Chen (陳韋任)
>Homepage: http://people.cs.nctu.edu.tw/~chenwj