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 double @test_double_arg_stack(i64 %a1, i32 %a2, i32 %a3, double %a4) { ret double %a4 }