diff options
Diffstat (limited to 'lib/CodeGen/MachineInstr.cpp')
| -rw-r--r-- | lib/CodeGen/MachineInstr.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp index ce0c5e6a87..402178dc6d 100644 --- a/lib/CodeGen/MachineInstr.cpp +++ b/lib/CodeGen/MachineInstr.cpp @@ -117,7 +117,8 @@ void MachineOperand::substVirtReg(unsigned Reg, unsigned SubIdx, if (SubIdx && getSubReg()) SubIdx = TRI.composeSubRegIndices(SubIdx, getSubReg()); setReg(Reg); - setSubReg(SubIdx); + if (SubIdx) + setSubReg(SubIdx); } void MachineOperand::substPhysReg(unsigned Reg, const TargetRegisterInfo &TRI) { |