Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; Bugzilla: https://bugs.llvm.org/show_bug.cgi?id=33623 ; RUN: llvm-diff %s %s %A = type { i64, i64 } @_gm_ = global <2 x %A*> zeroinitializer define void @f() { entry: store <2 x %A*> undef, <2 x %A*>* @_gm_ ret void }