Replace some assert(0)'s with llvm_unreachable.

llvm-svn: 211141
diff --git a/llvm/lib/Target/Sparc/SparcJITInfo.cpp b/llvm/lib/Target/Sparc/SparcJITInfo.cpp
index c775e9e..d0eec98 100644
--- a/llvm/lib/Target/Sparc/SparcJITInfo.cpp
+++ b/llvm/lib/Target/Sparc/SparcJITInfo.cpp
@@ -213,7 +213,8 @@
 
 
 void SparcJITInfo::replaceMachineCodeForFunction(void *Old, void *New) {
-  assert(0 && "FIXME: Implement SparcJITInfo::replaceMachineCodeForFunction");
+  llvm_unreachable("FIXME: Implement SparcJITInfo::"
+                   "replaceMachineCodeForFunction");
 }