diff options
Diffstat (limited to 'lib/CodeGen/RegisterScavenging.cpp')
| -rw-r--r-- | lib/CodeGen/RegisterScavenging.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/CodeGen/RegisterScavenging.cpp b/lib/CodeGen/RegisterScavenging.cpp index 98f485045f..972cf13a24 100644 --- a/lib/CodeGen/RegisterScavenging.cpp +++ b/lib/CodeGen/RegisterScavenging.cpp @@ -155,6 +155,9 @@ static bool isLiveInButUnusedBefore(unsigned Reg, MachineInstr *MI, SmallPtrSet<MachineInstr*, 4> UsesInMBB; for (MachineRegisterInfo::use_iterator UI = MRI->use_begin(Reg), UE = MRI->use_end(); UI != UE; ++UI) { + MachineOperand &UseMO = UI.getOperand(); + if (UseMO.isReg() && UseMO.isUndef()) + continue; MachineInstr *UseMI = &*UI; if (UseMI->getParent() == MBB) UsesInMBB.insert(UseMI); |