Add explanatory comment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149416 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMConstantIslandPass.cpp b/lib/Target/ARM/ARMConstantIslandPass.cpp
index e6f49ab86f080cf3cf16809ae6e209a03aca1463..1828cbb696b3dae086adee6156a6fee221085fc2 100644 (file)
--- a/lib/Target/ARM/ARMConstantIslandPass.cpp
+++ b/lib/Target/ARM/ARMConstantIslandPass.cpp
@@ -834,6 +834,7 @@ unsigned ARMConstantIslands::GetOffsetOf(MachineInstr *MI) const {
     if (&*I == MI) return Offset;
     Offset += TII->GetInstSizeInBytes(I);
   }
+  // Unreachable.
 }
 
 /// CompareMBBNumbers - Little predicate function to sort the WaterList by MBB