llvm/test/CodeGen/MIR/X86/variable-sized-stack-objects.mir

# RUN: llc -march=x86-64 -run-pass none -o - %s | FileCheck %s
# This test ensures that the MIR parser parses variable sized stack objects
# correctly.

--- |

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

...
---
name:            test
frameInfo:
  stackSize:       24
  offsetAdjustment: -16
  maxAlignment:    8
  adjustsStack:    true
# CHECK: stack:
# CHECK-NEXT: - { id: 0, name: '', type: default, offset: -20, size: 4, alignment: 4,
# CHECK-NEXT:  stack-id: default, callee-saved-register: '', callee-saved-restored: true,
# CHECK-NEXT: debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
# CHECK-NEXT: - { id: 1, name: '', type: default, offset: -32, size: 8, alignment: 8,
# CHECK-NEXT:  stack-id: default, callee-saved-register: '', callee-saved-restored: true,
# CHECK-NEXT: debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
# CHECK-NEXT: - { id: 2, name: y, type: variable-sized, offset: -32, alignment: 1,
stack:
  - { id: 0, offset: -20, size: 4, alignment: 4 }
  - { id: 1, offset: -32, size: 8, alignment: 8 }
  - { id: 2, name: y, type: variable-sized, offset: -32, alignment: 1 }
body: |
  bb.0.entry:
    MOV32mr $rsp, 1, _, -4, _, $edi
    MOV64mi32 $rsp, 1, _, -16, _, 2
    $eax = MOV32rm $rsp, 1, _, -4, _
    RET64 $eax
...