how to get loop boundary form ForStmt

Hi,
I'm new with clang. I want to know how to get loop boundary form ForStmt.
For example, for(int i = 0; i!=10;++i) , I want to get the value 0 and 10.
Then I can use those value in other template such as intel TBB parallel_for.

I already know that getCond(),getInit() method, but how to get the value?

Thanks.