| commit | 247c5ab07c1c136f37f5ad8ade9a1ee086ca452e | [log] [tgz] |
|---|---|---|
| author | Manman Ren <mren@apple.com> | Fri May 11 01:30:47 2012 +0000 |
| committer | Manman Ren <mren@apple.com> | Fri May 11 01:30:47 2012 +0000 |
| tree | 4fe950876dc2d1f1b6faf9002432103026a2f00c | |
| parent | d4347e1af9141ec9f8e3e527367bfd16c0cc4ffb [diff] |
ARM: peephole optimization to remove cmp instruction This patch will optimize the following cases: sub r1, r3 | sub r1, imm cmp r3, r1 or cmp r1, r3 | cmp r1, imm bge L1 TO subs r1, r3 bge L1 or ble L1 If the branch instruction can use flag from "sub", then we can replace "sub" with "subs" and eliminate the "cmp" instruction. rdar: 10734411 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156599 91177308-0d34-0410-b5e6-96231b3b80d8