Implement changes from Chris's feedback.
Finish converting lib/Target.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75043 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/MSP430/MSP430ISelLowering.cpp b/lib/Target/MSP430/MSP430ISelLowering.cpp
index 0fd96cc..10d4457 100644
--- a/lib/Target/MSP430/MSP430ISelLowering.cpp
+++ b/lib/Target/MSP430/MSP430ISelLowering.cpp
@@ -193,11 +193,11 @@
       switch (RegVT.getSimpleVT()) {
       default: 
         {
-          std::string msg;
-          raw_string_ostream Msg(msg);
-          Msg << "LowerFORMAL_ARGUMENTS Unhandled argument type: "
-            << RegVT.getSimpleVT();
-          llvm_report_error(Msg.str());
+#ifndef NDEBUG
+          cerr << "LowerFORMAL_ARGUMENTS Unhandled argument type: "
+               << RegVT.getSimpleVT() << "\n";
+#endif
+          llvm_unreachable();
         }
       case MVT::i16:
         unsigned VReg =