# RUN: llc -O0 -run-pass=legalizer -global-isel-abort=0 -pass-remarks-missed='gisel*' %s -o - 2>&1 | FileCheck %s

--- |
  target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
  target triple = "aarch64--"
  define void @test_unmerge_s4() {
    ret void
  }
...

---
name:            test_unmerge_s4
registers:
  - { id: 0, class: _ }
  - { id: 1, class: _ }
  - { id: 2, class: _ }
  - { id: 3, class: _ }
body: |
  bb.0:
    %0(s8) = G_CONSTANT i8 0
    ; Previously, LegalizerInfo was assuming all G_MERGE_VALUES and G_UNMERGE_VALUES
    ; instructions are legal. Make sure that is no longer happening.
    ; CHECK: unable to legalize instruction: {{.*}} G_UNMERGE_VALUES
    %1(s4), %2(s4)= G_UNMERGE_VALUES %0(s8)
    %3(s64) = G_ANYEXT %1(s4)
    $x0 = COPY %3(s64)

...