Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: not opt -S < %s 2>&1 | FileCheck %s !named = !{!0} !0 = !DICompositeType(tag: DW_TAG_structure_type, name: "A", size: 1, flags: DIFlagTypePassByReference | DIFlagTypePassByValue) ; CHECK: invalid reference flags