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203 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
6a0dc079ef Implement loop splitting analysis. 
Determine which loop exit blocks need a 'pre-exit' block inserted.
Recognize when this would be impossible.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108941 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-20 21:46:58 +00:00
Jakob Stoklund Olesen
abff28087f Appease the colonials. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108845 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-20 16:12:37 +00:00
Jakob Stoklund Olesen
8ae0263471 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@108842 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-07-20 15:41:07 +00:00