llvm/test/MachineVerifier/verify-regbankselected.mir

# RUN: not --crash llc -verify-machineinstrs -run-pass none -o /dev/null %s 2>&1 | FileCheck %s
# REQUIRES: aarch64-registered-target

--- |

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

...
---
# CHECK: *** Bad machine code: Generic virtual register must have a bank in a RegBankSelected function ***
# CHECK: instruction: %0:_(s64) = COPY
# CHECK: operand 0: %0
name:            test
regBankSelected: true
registers:
  - { id: 0, class: _ }
body: |
  bb.0:
   liveins: $x0
   %0(s64) = COPY $x0
...