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/Alpha/AlphaJITInfo.cpp b/lib/Target/Alpha/AlphaJITInfo.cpp
index c62ab75..8919dc0 100644
--- a/lib/Target/Alpha/AlphaJITInfo.cpp
+++ b/lib/Target/Alpha/AlphaJITInfo.cpp
@@ -72,7 +72,7 @@
 
 void AlphaJITInfo::replaceMachineCodeForFunction(void *Old, void *New) {
   //FIXME
-  assert(0);
+  llvm_unreachable();
 }
 
 static TargetJITInfo::JITCompilerFn JITCompilerFunction;
@@ -241,7 +241,7 @@
     long idx = 0;
     bool doCommon = true;
     switch ((Alpha::RelocationType)MR->getRelocationType()) {
-    default: assert(0 && "Unknown relocation type!");
+    default: LLVM_UNREACHABLE("Unknown relocation type!");
     case Alpha::reloc_literal:
       //This is a LDQl
       idx = MR->getGOTIndex();
@@ -281,7 +281,7 @@
         DOUT << "LDA: " << idx << "\n";
         break;
       default:
-        assert(0 && "Cannot handle gpdist yet");
+        LLVM_UNREACHABLE("Cannot handle gpdist yet");
       }
       break;
     case Alpha::reloc_bsr: {