diff --git a/lib/DebugInfo/DWARF/DWARFDebugFrame.cpp b/lib/DebugInfo/DWARF/DWARFDebugFrame.cpp
index d95cbb70225..3ff1c0700dd 100644
--- a/lib/DebugInfo/DWARF/DWARFDebugFrame.cpp
+++ b/lib/DebugInfo/DWARF/DWARFDebugFrame.cpp
@@ -422,6 +422,7 @@ CFIProgram::Instruction::getOperandAsUnsigned(const CFIProgram &CFIP,
     return Operand * CodeAlignmentFactor;
   }
   }
+  llvm_unreachable("invalid operand type");
 }
 
 llvm::Expected<int64_t>
@@ -474,6 +475,7 @@ CFIProgram::Instruction::getOperandAsSigned(const CFIProgram &CFIP,
     return Operand * DataAlignmentFactor;
   }
   }
+  llvm_unreachable("invalid operand type");
 }
 
 Error UnwindTable::parseRows(const CFIProgram &CFIP, UnwindRow &Row,