Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: llvm-mc -filetype=asm -triple x86_64-pc-linux-gnu %s 2>&1 | FileCheck %s .cfi_sections .debug_frame .cfi_startproc .cfi_rel_offset 99, 0 // CHECK: .cfi_rel_offset 99, 0 .cfi_endproc