Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

vararg_no_start.ll
; RUN: llc -mtriple=x86_64-linux < %s | FileCheck %s
; RUN: llc -mtriple=x86_64-windows-msvc < %s | FileCheck %s

define void @foo(ptr, ...) {
  ret void
}
; CHECK-LABEL: {{^_?}}foo:
; CHECK-NOT: movq
; CHECK: retq