Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: llvm-mc -triple avr -mattr=avr6 -filetype=obj < %s 2>&1 | llvm-objdump -r - | FileCheck %s ; CHECK: R_AVR_CALL foo+0x7fffff jmp foo+8388607