diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/LiveIntervalAnalysis.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp index 622b9c25d0e..1a8360b226b 100644 --- a/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp +++ b/llvm/lib/CodeGen/LiveIntervalAnalysis.cpp @@ -1314,6 +1314,8 @@ private: if (TargetRegisterInfo::isVirtualRegister(Reg)) { SlotIndex LastUse = Before; for (MachineOperand &MO : MRI.use_nodbg_operands(Reg)) { + if (MO.isUndef()) + continue; unsigned SubReg = MO.getSubReg(); if (SubReg != 0 && LaneMask != 0 && (TRI.getSubRegIndexLaneMask(SubReg) & LaneMask) == 0) @@ -1353,7 +1355,7 @@ private: // Check if MII uses Reg. for (MIBundleOperands MO(*MII); MO.isValid(); ++MO) - if (MO->isReg() && + if (MO->isReg() && !MO->isUndef() && TargetRegisterInfo::isPhysicalRegister(MO->getReg()) && TRI.hasRegUnit(MO->getReg(), Reg)) return Idx.getRegSlot(); |
