[LLVMdev] How to get block with a backedge

[Sebastian Dreßler]

Hi,

On 02/20/2013 12:42 PM, Blind Faith wrote:
> I can get the loop header block by using
> 
> getAnalysis < LoopInfo > ( *F ).isLoopHeader( BB )
> 
> But is there any way with with you can also check the blocks containing
> backedge.
> 

Usually, the loop header is the BB with the backedge. You can get the
number of backedges by using "getNumBackEdges()" of the LoopInfo pass.

You can also use the DominatorTree directly to search for backedges.


Cheers,
Sebastian

-- 
Mit freundlichen Grüßen / Kind regards

Sebastian Dreßler

Zuse Institute Berlin (ZIB)
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Germany

dressler at zib.de
Phone: +49 30 84185-261

http://www.zib.de/