assert(0) -> LLVM_UNREACHABLE.
Make llvm_unreachable take an optional string, thus moving the cerr<< out of
line.
LLVM_UNREACHABLE is now a simple wrapper that makes the message go away for
NDEBUG builds.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75379 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsInstrInfo.h b/lib/Target/Mips/MipsInstrInfo.h
index 6655c67..9c47d8e 100644
--- a/lib/Target/Mips/MipsInstrInfo.h
+++ b/lib/Target/Mips/MipsInstrInfo.h
@@ -15,6 +15,7 @@
 #define MIPSINSTRUCTIONINFO_H
 
 #include "Mips.h"
+#include "llvm/Support/ErrorHandling.h"
 #include "llvm/Target/TargetInstrInfo.h"
 #include "MipsRegisterInfo.h"
 
@@ -92,7 +93,7 @@
   inline static const char *MipsFCCToString(Mips::CondCode CC) 
   {
     switch (CC) {
-      default: assert(0 && "Unknown condition code");
+      default: LLVM_UNREACHABLE("Unknown condition code");
       case FCOND_F:
       case FCOND_T:   return "f";
       case FCOND_UN: