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

--- |

  define i32 @test(i32 %a) #0 {
  entry:
    %b = alloca i32
    store i32 %a, i32* %b
    %c = load i32, i32* %b
    ret i32 %c
  }

  attributes #0 = { "frame-pointer"="none" }

...
---
name:            test
frameInfo:
  maxAlignment:    4
fixedStack:
  # CHECK: [[@LINE+1]]:65: unknown key 'isImmutable'
  - { id: 0, type: spill-slot, offset: 0, size: 4, isImmutable: true }
stack:
  - { id: 0, offset: -12, size: 4, alignment: 4 }
body: |
  bb.0.entry:
    MOV32mr %rsp, 1, _, -4, _, %edi
    %eax = COPY %edi
    RETQ %eax
...