# RUN: not llc -march=x86-64 -run-pass none -o /dev/null %s 2>&1 | FileCheck %s
# This test ensures that an error is reported when an invalid machine basic
# block index is used.


--- |

  define i32 @foo(i32* %p) {
  entry:
    %a = load i32, i32* %p
    %b = icmp sle i32 %a, 10
    br i1 %b, label %0, label %1

  ; <label>:0
    ret i32 0

  ; <label>:1
    ret i32 %a
  }

...
---
name:            foo
body: |
  bb.0.entry:
    $eax = MOV32rm $rdi, 1, _, 0, _
    CMP32ri8 $eax, 10, implicit-def $eflags
    ; CHECK: [[@LINE+1]]:11: use of undefined machine basic block #4
    JCC_1 %bb.4, 15, implicit $eflags

  bb.1:
    $eax = MOV32r0 implicit-def $eflags

  bb.2:
    RETQ $eax
...