test legalizer
set enable_probestack=false
set enable_jump_tables=false
target x86_64

function u0:0(i64) {
    jt0 = jump_table []

block0(v0: i64):
    br_table v0, block1, jt0
; check:  block0(v0: i64):
; nextln:   jump block1

block1:
    return
}
; not: jump_table