diff options
Diffstat (limited to 'lib/CodeGen/MachineInstr.cpp')
| -rw-r--r-- | lib/CodeGen/MachineInstr.cpp | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp index 18e9f1a855..c281cd1149 100644 --- a/lib/CodeGen/MachineInstr.cpp +++ b/lib/CodeGen/MachineInstr.cpp @@ -1707,6 +1707,20 @@ bool MachineInstr::addRegisterKilled(unsigned IncomingReg, return Found; } +void MachineInstr::clearRegisterKills(unsigned Reg, + const TargetRegisterInfo *RegInfo) { + if (!TargetRegisterInfo::isPhysicalRegister(Reg)) + RegInfo = 0; + for (unsigned i = 0, e = getNumOperands(); i != e; ++i) { + MachineOperand &MO = getOperand(i); + if (!MO.isReg() || !MO.isUse() || !MO.isKill()) + continue; + unsigned OpReg = MO.getReg(); + if (OpReg == Reg || (RegInfo && RegInfo->isSuperRegister(Reg, OpReg))) + MO.setIsKill(false); + } +} + bool MachineInstr::addRegisterDead(unsigned IncomingReg, const TargetRegisterInfo *RegInfo, bool AddIfNotFound) { |