message: [IRMemoryMap] Fix -Wimplicit-fallthrough in -DLLVM_ENABLE_ASSERTIONS=off build
diff: @@ -275,7 +275,7 @@ IRMemoryMap::Allocation::Allocation(lldb::addr_t process_alloc,
  m_alignment(alignment) {
  switch (policy) {
  default:
  - assert(0 && "We cannot reach this!");
  + llvm_unreachable("Invalid AllocationPolicy");
  case eAllocationPolicyHostOnly:
  case eAllocationPolicyMirror:
  m_data.SetByteSize(size);
  