Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

max-branch-distance.s
//  RUN: not llvm-mc -arch=amdgcn -filetype=obj -o /dev/null %s 2>&1 | FileCheck -check-prefix=ERROR %s
//  ERROR: max-branch-distance.s:7:3: error: branch size exceeds simm16

// fill v_nop
LBB0_0:
    .fill 32768, 4, 0x0000007e
  s_branch LBB0_0