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/CellSPU/SPUISelDAGToDAG.cpp b/lib/Target/CellSPU/SPUISelDAGToDAG.cpp
index f9801d5..ddb9a36 100644
--- a/lib/Target/CellSPU/SPUISelDAGToDAG.cpp
+++ b/lib/Target/CellSPU/SPUISelDAGToDAG.cpp
@@ -378,7 +378,7 @@
         break;
       case 'v':   // not offsetable
 #if 1
-        assert(0 && "InlineAsmMemoryOperand 'v' constraint not handled.");
+        LLVM_UNREACHABLE("InlineAsmMemoryOperand 'v' constraint not handled.");
 #else
         SelectAddrIdxOnly(Op, Op, Op0, Op1);
 #endif