src/llvm-project/llvm/test/CodeGen/MIR/X86/duplicate-memory-operand-flag.mir

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

--- |

  define i32 @volatile_inc(i32* %x) {
  entry:
    %0 = load volatile i32, i32* %x
    %1 = add i32 %0, 1
    store volatile i32 %1, i32* %x
    ret i32 %1
  }

...
---
name:            volatile_inc
tracksRegLiveness: true
liveins:
  - { reg: '$rdi' }
body: |
  bb.0.entry:
    liveins: $rdi
  ; CHECK: [[@LINE+1]]:50: duplicate 'volatile' memory operand flag
    $eax = MOV32rm $rdi, 1, _, 0, _ :: (volatile volatile load (s32) from %ir.x)
    $eax = INC32r killed $eax, implicit-def dead $eflags
    MOV32mr killed $rdi, 1, _, 0, _, $eax :: (volatile store (s32) into %ir.x)
    RETQ $eax
...