test compile
target x86_64

function u0:0(i64, i64) -> i128 system_v {
block0(v0: i64, v1: i64):
    trap user0

block30:
    v245 = iconst.i64 0
    v246 = iconcat v245, v245
    ; The next instruction used to be legalized twice, causing a panic the second time.
    v250, v251 = isplit.i128 v370
    v252, v253 = isplit v246
    trap user0

block45:
    v369 = iconst.i64 0
    v370 = load.i128 v369
    trap user0
}