# RUN: not llc -march=x86-64 -run-pass none -o /dev/null %s 2>&1 | FileCheck %s

--- |

  define void @foo() {
  entry:
    ret void
  }

...
---
name:            foo
body: |
  bb.0.entry:
    ; CHECK: [[@LINE+1]]:5: unexpected character '\'
    \ RET64
...