# RUN: not llc -march=x86-64 -start-after machine-sink -stop-after machine-sink -o /dev/null %s 2>&1 | FileCheck %s

--- |

  define i32 @test(i32 %a) {
  body:
    ret i32 %a
  }

...
---
name:            test
isSSA:           true
tracksRegLiveness: true
registers:
  - { id: 0, class: gr32 }
# CHECK: [[@LINE+1]]:11: redefinition of virtual register '%0'
  - { id: 0, class: gr32 }
body:
  - id:          0
    name:        body
    liveins:     [ '%edi' ]
    instructions:
      - '%0 = COPY %edi'
      - '%eax = COPY %0'
      - 'RETQ %eax'
...