test regalloc

; We can add more ISAs once they have defined encodings.
isa riscv

function add(i32, i32) {
ebb0(v1: i32, v2: i32):
    v3 = iadd v1, v2
; check: [R#0c,%x5]
; sameln: iadd
    return
}

; Function with a dead argument.
function dead_arg(i32, i32) -> i32{
ebb0(v1: i32, v2: i32):
; check: return $v1
    return v1
}