Evan Cheng bf92316fab Optimize:
r1025 = s/zext r1024, 4
  r1026 = extract_subreg r1025, 4
to:
  r1026 = copy r1024

llvm-svn: 122925
2011-01-05 23:06:49 +00:00
..
2011-01-05 23:06:49 +00:00
2010-08-29 14:49:00 +00:00