llvm dev - Jun 2016 - Tracing global variables use in llvm

I am trying to write a custom analysis pass. Below is a llvm-ir snippet
from my module.

1 @my_string = common global i8* null, align 8
2 %tmp1 = load i8*, i8** @my_string, align 8
3 call void @copy_string(i8* %tmp1, i8* %tmp2, i8* %tmp3)

I wish to make a check, if one of the function parameters passed is a
global variable or not? For instance in above example code, I wish to check
if %tmp1 is a global variable or not?

Could you suggest the best way to achieve this?

Thanks in advance.

-- 
*Arun Tewatia*
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.llvm.org/pipermail/llvm-dev/attachments/20160612/ed004825/attachment.html>