Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

export-nothing.ll
; RUN: opt -passes=wholeprogramdevirt -whole-program-visibility -wholeprogramdevirt-summary-action=export -wholeprogramdevirt-write-summary=%t -o /dev/null %s
; RUN: FileCheck %s < %t

; CHECK: ---
; CHECK-NEXT: GlobalValueMap:
; CHECK-NEXT: TypeIdMap:
; CHECK-NEXT: WithGlobalValueDeadStripping: false
; CHECK-NEXT: ...