Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
; RUN: llc -mtriple=x86_64-pc-linux < %s ; PR9309 define <4 x double> @f_fu(<4 x float>) nounwind { %float2double.i = fpext <4 x float> %0 to <4 x double> ret <4 x double> %float2double.i }