llvm-project/llvm/test/CodeGen/MIR/X86/stack-objects.mir

# RUN: llc -march=x86-64 -start-after branch-folder -stop-after branch-folder -o /dev/null %s | FileCheck %s
# This test ensures that the MIR parser parses stack objects correctly.

--- |

  define i32 @test(i32 %a) #0 {
  entry:
    %b = alloca i32
    %x = alloca i64
    store i32 %a, i32* %b
    store i64 2, i64* %x
    %c = load i32, i32* %b
    ret i32 %c
  }

  attributes #0 = { "no-frame-pointer-elim"="false" }

...
---
name:            test
frameInfo:
  maxAlignment:    8
# CHECK: stack:
# CHECK-NEXT: - { id: 0, name: b, offset: -12, size: 4, alignment: 4 }
# CHECK-NEXT: - { id: 1, name: x, offset: -24, size: 8, alignment: 8 }
# CHECK-NEXT: - { id: 2, type: spill-slot, offset: -32, size: 4, alignment: 4 }
stack:
  - { id: 0, name: b, offset: -12, size: 4, alignment: 4 }
  - { id: 1, name: x, offset: -24, size: 8, alignment: 8 }
  - { id: 2, type: spill-slot, offset: -32, size: 4, alignment: 4 }
body:
  - id:          0
    name:        entry
    instructions:
      - 'MOV32mr %rsp, 1, _, -4, _, %edi'
      - 'MOV64mi32 %rsp, 1, _, -16, _, 2'
      - '%eax = MOV32rm %rsp, 1, _, -4, _'
      - 'RETQ %eax'
...