Minor cleanups to a few llvm_unreachable() calls.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119767 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMMCCodeEmitter.cpp b/lib/Target/ARM/ARMMCCodeEmitter.cpp
index 8cf31e7..5ad117e 100644
--- a/lib/Target/ARM/ARMMCCodeEmitter.cpp
+++ b/lib/Target/ARM/ARMMCCodeEmitter.cpp
@@ -316,10 +316,7 @@
                      .bitcastToAPInt().getHiBits(32).getLimitedValue());
   }
 
-#ifndef NDEBUG
-  errs() << MO;
-#endif
-  llvm_unreachable(0);
+  llvm_unreachable("Unable to encode MCOperand!");
   return 0;
 }
 
@@ -421,8 +418,8 @@
     }
     Fixups.push_back(MCFixup::Create(0, Expr, Kind));
     return 0;
-  }
-  llvm_unreachable("Unsupported MCExpr type in MCOperand");
+  };
+  llvm_unreachable("Unsupported MCExpr type in MCOperand!");
   return 0;
 }