Evan Cheng 2922daab4b Bottom up register pressure reduction work: clean up some hacks and enhanced
the heuristic to further reduce spills for several test cases. (Note, it may
not necessarily translate to runtime win!)

llvm-svn: 28076
2006-05-03 02:10:45 +00:00
..
2006-04-08 01:19:47 +00:00