Manman Ren 2af66dc51a X86: peephole optimization to remove cmp instruction
For each Cmp, we check whether there is an earlier Sub which make Cmp
redundant. We handle the case where SUB operates on the same source operands as
Cmp, including the case where the two source operands are swapped.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159838 91177308-0d34-0410-b5e6-96231b3b80d8
2012-07-06 17:36:20 +00:00
..
2012-07-06 08:45:08 +00:00