Fix some leftover control reaches end of non-void function warnings.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@147874 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Sparc/SparcInstrInfo.cpp b/lib/Target/Sparc/SparcInstrInfo.cpp
index ccb6443..52266ff 100644
--- a/lib/Target/Sparc/SparcInstrInfo.cpp
+++ b/lib/Target/Sparc/SparcInstrInfo.cpp
@@ -109,6 +109,7 @@
   case SPCC::FCC_NE:   return SPCC::FCC_E;
   case SPCC::FCC_E:    return SPCC::FCC_NE;
   }
+  llvm_unreachable("Invalid cond code");
 }
 
 MachineInstr *