test/CodeGen/MIR/Generic/machine-basic-block-undefined-ir-block.mir

# RUN: not llc -start-after branch-folder -stop-after branch-folder -o /dev/null %s 2>&1 | FileCheck %s

--- |

  define i32 @foo() {
    ret i32 0
  }

...
---
name:            foo
body: |
  ; CHECK: [[@LINE+1]]:9: use of undefined IR block '%ir-block.10'
  bb.0 (%ir-block.10):
...