Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

empty1.mir
# RUN: llc -mtriple=x86_64-- -run-pass none -o - %s | FileCheck %s
# Make sure empty files don't crash us
--- |
...
# CHECK: --- |
# ... moduleid, sourcefilename stuff here ..
# CHECK: target datalayout =
# CHECK: ...