STEP 0:
    modifications:
        U : js/l1js.0.kt -> js/l1js.kt
        U : common/l1common.0.kt -> common/l1common.kt
    added file: l1js.kt, l1common.kt
STEP 1:
    modifications:
        U : js/l1js.1.kt -> js/l1js.kt
    modified ir: l1js.kt

