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Author SHA1 Message Date
Tobias Grosser 7fbe6cb429 RegionInfo: Do not assert if a BB is not part of the dominance tree. 
llvm-svn: 110665
 2010-08-10 09:54:35 +00:00
Tobias Grosser 336734aca6 Add new RegionInfo pass. 
The RegionInfo pass detects single entry single exit regions in a function,
where a region is defined as any subgraph that is connected to the remaining
graph at only two spots.
Furthermore an hierarchical region tree is built.
Use it by calling "opt -regions analyze" or "opt -view-regions".

llvm-svn: 109089
 2010-07-22 07:46:31 +00:00