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Author SHA1 Message Date
Jakob Stoklund Olesen f96ae684c4 Turn the EdgeBundles class into a stand-alone machine CFG analysis pass. 
The analysis will be needed by both the greedy register allocator and the
X86FloatingPoint pass. It only needs to be computed once when the CFG doesn't
change.

This pass is very fast, usually showing up as 0.0% wall time.

llvm-svn: 122832
 2011-01-04 21:10:05 +00:00