Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: llc -mtriple=arm-eabi -mattr=+vfp2 %s -o /dev/null define i64 @test_i64_arg3(i64 %a1, i64 %a2, i64 %a3) { ret i64 %a3 }