Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s @ptr = external global i8, align 1 @ref = constant i32 ptrtoint (ptr @ptr to i32), align 4 ; CHECK: .long ptr{{$}}