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103 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
ed4075cc3b Implement loop splitting analysis. 
Determine which loop exit blocks need a 'pre-exit' block inserted.
Recognize when this would be impossible.

llvm-svn: 108941
 2010-07-20 21:46:58 +00:00
Jakob Stoklund Olesen
ff095507e3 Appease the colonials. 
llvm-svn: 108845
 2010-07-20 16:12:37 +00:00
Jakob Stoklund Olesen
36d12c679d Beginning SplitKit - utility classes for live range splitting. 
This is a work in progress. So far we have some basic loop analysis to help
determine where it is useful to split a live range around a loop.

The actual loop splitting code from Splitter.cpp is also going to move in here.

llvm-svn: 108842
 2010-07-20 15:41:07 +00:00