Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
# RUN: not --crash llvm-mc -triple riscv64 -mattr=+e < %s 2>&1 \ # RUN: | FileCheck %s -check-prefix=RV64E # RV64E: LLVM ERROR: RV32E can't be enabled for an RV64 target