diff options
| -rw-r--r-- | include/llvm/MC/MCRegisterInfo.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/llvm/MC/MCRegisterInfo.h b/include/llvm/MC/MCRegisterInfo.h index 1fe870ed14..f5b4dddc51 100644 --- a/include/llvm/MC/MCRegisterInfo.h +++ b/include/llvm/MC/MCRegisterInfo.h @@ -479,6 +479,7 @@ public: /// MCRegUnitIterator - Create an iterator that traverses the register units /// in Reg. MCRegUnitIterator(unsigned Reg, const MCRegisterInfo *MCRI) { + assert(Reg && "Null register has no regunits"); // Decode the RegUnits MCRegisterDesc field. unsigned RU = MCRI->get(Reg).RegUnits; unsigned Scale = RU & 15; |