Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

symbol-redefinition.ll
; RUN: not llc -mtriple=x86_64-unknown-unknown %s -o - 2>&1 | FileCheck %s

; CHECK: <unknown>:0: error: symbol 'fn' is already defined
define void @fn() section "fn" {
  ret void
}

; CHECK: <unknown>:0: error: symbol 'var' is already defined
@var = global i32 0, section "var", align 4