The type of the borrow operands for the borrow variants of the isub instruction (isub_bin, isub_bout, isub_borrow) was bool for compatibility reasons for isa/riscv. Since support for these instructions on RISC architectures has been temporarily suspended, we can safely change the type to iflags.
This crate contains the metaprogram used by cranelift-codegen. It's not useful on its own.