Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: FileCheck -input-file %s %s op r1 op r2, [x r1] op r3, [r1] ; CHECK: op [[REG:r[0-9]]] ; CHECK: op [[REG2:r[0-9]]], [x [[REG]]] ; CHECK: op [[REG3:r[0-9]]], [[[REG]]]