Convert assert(0) to llvm_unreachable

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149967 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
index 669ff4c..4be91d3 100644
--- a/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
+++ b/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldMachO.cpp
@@ -26,7 +26,7 @@
                   unsigned Type, unsigned Size, int64_t Addend) {
   // This just dispatches to the proper target specific routine.
   switch (CPUType) {
-  default: assert(0 && "Unsupported CPU type!");
+  default: llvm_unreachable("Unsupported CPU type!");
   case mach::CTM_x86_64:
     return resolveX86_64Relocation((uintptr_t)Address, (uintptr_t)Value,
                                    isPCRel, Type, Size, Addend);