Convert assert(0) to llvm_unreachable

llvm-svn: 149961
diff --git a/llvm/lib/Target/MBlaze/MBlazeMCInstLower.cpp b/llvm/lib/Target/MBlaze/MBlazeMCInstLower.cpp
index 858d54b..6b9f42e 100644
--- a/llvm/lib/Target/MBlaze/MBlazeMCInstLower.cpp
+++ b/llvm/lib/Target/MBlaze/MBlazeMCInstLower.cpp
@@ -85,9 +85,7 @@
 MCSymbol *MBlazeMCInstLower::
 GetBlockAddressSymbol(const MachineOperand &MO) const {
   switch (MO.getTargetFlags()) {
-  default:
-      assert(0 && "Unknown target flag on GV operand");
-
+  default: llvm_unreachable("Unknown target flag on GV operand");
   case 0: break;
   }