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

# RUN: llc -start-after branch-folder -stop-after branch-folder -o /dev/null %s 2>&1 2>&1 | FileCheck %s
# This test ensures that the MIR parser preserves unnamed LLVM IR block
# references.

--- |

  define i32 @foo() {
    ret i32 0
  }

...
---
name:            foo
body: |
  ; CHECK: bb.0 (%ir-block.0):
  bb.0 (%ir-block.0):
...