#RUN: not --crash llc -o - -global-isel -run-pass=none -verify-machineinstrs %s 2>&1 | FileCheck %s
# REQUIRES: global-isel, aarch64-registered-target
--- |
  target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
  target triple = "aarch64-unknown-unknown"
  
  define i32 @g_concat_vectors() {
    ret i32 0
  }

...
---
name:            g_concat_vectors
legalized:       true
regBankSelected: false
selected:        false
tracksRegLiveness: true
registers:       
  - { id: 0, class: _, preferred-register: '' }
  - { id: 1, class: _, preferred-register: '' }
liveins:         
body:             |
  bb.0:
    ; CHECK: Bad machine code: G_CONCAT_VECTOR num dest and source elements should match

    %0(<2 x s32>) = IMPLICIT_DEF
    %1(<2 x s32>) = IMPLICIT_DEF
    %2:_(<2 x s32>) = G_CONCAT_VECTORS %0, %1
...