llvm/test/CodeGen/MIR/X86/undefined-stack-object.mir

# RUN: not llc -mtriple=x86_64 -run-pass none -o /dev/null %s 2>&1 | FileCheck %s
--- |

  define i32 @test(i32 %a) {
  entry:
    %b = alloca i32
    store i32 %a, ptr %b
    %c = load i32, ptr %b
    ret i32 %c
  }

...
---
name:            test
tracksRegLiveness: true
registers:
  - { id: 0, class: gr32 }
frameInfo:
  maxAlignment:  4
stack:
  - { id: 0, name: b, size: 4, alignment: 4 }
body: |
  bb.0.entry:
    %0 = COPY $edi
    ; CHECK: [[@LINE+1]]:13: use of undefined stack object '%stack.2'
    MOV32mr %stack.2, 1, _, 0, _, %0
    $eax = COPY %0
    RET64 $eax
...