diff options
Diffstat (limited to 'llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp index 58f4e160de8..3a180dfa279 100644 --- a/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp +++ b/llvm/lib/Target/ARM/ARMBaseInstrInfo.cpp @@ -1802,6 +1802,8 @@ static bool isSuitableForMask(MachineInstr *&MI, unsigned SrcReg, bool ARMBaseInstrInfo:: OptimizeCompareInstr(MachineInstr *CmpInstr, unsigned SrcReg, int CmpMask, int CmpValue, const MachineRegisterInfo *MRI) const { + if (MRI->def_empty(SrcReg)) + return false; MachineRegisterInfo::def_iterator DI = MRI->def_begin(SrcReg); if (llvm::next(DI) != MRI->def_end()) |
