llvm dev - Aug 2012 - [LLVMdev] The use-define chain in LLVM

Hello All,

        Is the use-define chain related API avaliable in LLVM? I want
to get the information
about the variables' value changes at different points in the program.

Best wishes.

On Thu, Aug 09, 2012 at 11:16:15AM +0800, Jianfei Hu
wrote:
> Hello All,
> 
>         Is the use-define chain related API avaliable in LLVM? I want
> to get the information
> about the variables' value changes at different points in the program.
  Is this [1] fit your need?

HTH,
chenwj

[1] http://llvm.org/docs/ProgrammersManual.html#iterate_chains

-- 
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
Homepage: http://people.cs.nctu.edu.tw/~chenwj

Thanks for your response!

But I want to determine wheter the specific variable's value has been
changed between
two usages of variable, and wheter the parameter's value is changed in
a function. Like the
reaching definition analysis, and ud chains.


2012/8/9 ��f�� (Wei-Ren Chen) <chenwj at
iis.sinica.edu.tw>:
> On Thu, Aug 09, 2012 at 11:16:15AM +0800, Jianfei Hu wrote:
>> Hello All,
>>
>>         Is the use-define chain related API avaliable in LLVM? I want
>> to get the information
>> about the variables' value changes at different points in the
program.
>
>   Is this [1] fit your need?
>
> HTH,
> chenwj
>
> [1] http://llvm.org/docs/ProgrammersManual.html#iterate_chains
This just supplys the variables used by the one instruction.
Is there any other class/API that can meet my demands?
Or I have to implement it by myself from the llvm IR code?
>
> --
> Wei-Ren Chen (��f��)
> Computer Systems Lab, Institute of Information Science,
> Academia Sinica, Taiwan (R.O.C.)
> Tel:886-2-2788-3799 #1667
> Homepage: http://people.cs.nctu.edu.tw/~chenwj