diff options
| author | Manman Ren <mren@apple.com> | 2012-07-18 21:40:01 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2012-07-18 21:40:01 +0000 |
| commit | 62a89f5808bbb620767d95adb784978ed2e7bff0 (patch) | |
| tree | 170f0bd3a274ea211c6ee4d6ee571eb114f3e68c /lib/Target/X86/X86InstrArithmetic.td | |
| parent | d4d961615c67082bc24bfa5d372a93a1dcff3457 (diff) | |
| download | llvm-62a89f5808bbb620767d95adb784978ed2e7bff0.tar.gz llvm-62a89f5808bbb620767d95adb784978ed2e7bff0.tar.bz2 llvm-62a89f5808bbb620767d95adb784978ed2e7bff0.tar.xz | |
X86: remove redundant cmp against zero.
Updated OptimizeCompare in peephole to remove redundant cmp against zero.
We only remove Compare if CF and OF are not used.
rdar://11855129
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160454 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86InstrArithmetic.td')
| -rw-r--r-- | lib/Target/X86/X86InstrArithmetic.td | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Target/X86/X86InstrArithmetic.td b/lib/Target/X86/X86InstrArithmetic.td index c2b59b40ef..b6ba68fff0 100644 --- a/lib/Target/X86/X86InstrArithmetic.td +++ b/lib/Target/X86/X86InstrArithmetic.td @@ -1156,7 +1156,7 @@ defm CMP : ArithBinOp_F<0x38, 0x3A, 0x3C, "cmp", MRM7r, MRM7m, X86cmp, 0, 0>; def X86testpat : PatFrag<(ops node:$lhs, node:$rhs), (X86cmp (and_su node:$lhs, node:$rhs), 0)>; -let Defs = [EFLAGS] in { +let isCompare = 1, Defs = [EFLAGS] in { let isCommutable = 1 in { def TEST8rr : BinOpRR_F<0x84, "test", Xi8 , X86testpat, MRMSrcReg>; def TEST16rr : BinOpRR_F<0x84, "test", Xi16, X86testpat, MRMSrcReg>; |