| commit | 73c2f7f5ed767a6fc062fd198551be902b7b7d5b | [log] [tgz] |
|---|---|---|
| author | Manman Ren <mren@apple.com> | Fri Jun 01 19:49:33 2012 +0000 |
| committer | Manman Ren <mren@apple.com> | Fri Jun 01 19:49:33 2012 +0000 |
| tree | 0e7ddc57a166cd5f076eac14c404412061d88d0f | |
| parent | 68f25571e759c1fcf2da206109647259f49f7416 [diff] |
X86: peephole optimization to remove cmp instruction This patch will optimize the following: sub r1, r3 cmp r3, r1 or cmp r1, r3 bge L1 TO sub r1, r3 bge L1 or ble L1 If the branch instruction can use flag from "sub", then we can eliminate the "cmp" instruction. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157831 91177308-0d34-0410-b5e6-96231b3b80d8