Jakob Stoklund Olesen d40af5ffbd Add MachineLoopRanges analysis.
A MachineLoopRange contains the intervals of slot indexes covered by the blocks
in a loop. This representation of the loop blocks is more efficient to compare
against interfering registers during register coalescing.

llvm-svn: 121917
2010-12-15 23:41:23 +00:00
..
2010-12-15 23:41:23 +00:00