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3 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
5add6d16b7 Build the Hopfield network incrementally when splitting global live ranges. 
It is common for large live ranges to have few basic blocks with register uses
and many live-through blocks without any uses. This approach grows the Hopfield
network incrementally around the use blocks, completely avoiding checking
interference for some through blocks.

llvm-svn: 129188
 2011-04-09 02:59:09 +00:00
Jakob Stoklund Olesen
ce25984bae Add a hidden command line option to display edge bundle graphs as they are 
calculated.

llvm-svn: 122912
 2011-01-05 21:50:24 +00:00
Jakob Stoklund Olesen
abf8941a60 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