test regalloc

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

; regex: RX=%x\d+

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):
; not: regmove
; check: return $v1
    return v1
}

; Return a value from a different register.
function %move1(i32, i32) -> i32 {
ebb0(v1: i32, v2: i32):
; not: regmove
; check: regmove $v2, %x11 -> %x10
; nextln: return $v2
        return v2
}

; Swap two registers.
function %swap(i32, i32) -> i32, i32 {
ebb0(v1: i32, v2: i32):
; not: regmove
; check: regmove $v2, %x11 -> $(tmp=$RX)
; nextln: regmove $v1, %x10 -> %x11
; nextln: regmove $v2, $tmp -> %x10
; nextln: return $v2, $v1
        return v2, v1
}