llvm/llvm/test/CodeGen/AArch64/wineh-frame-scavenge.mir

# RUN: llc -o - %s -mtriple=aarch64-windows -start-before=prologepilog \
# RUN:   -stop-after=prologepilog | FileCheck %s
# Check where the stack variable is placed

# CHECK:      - { id: 0, name: '', type: default, offset: -4, size: 4, alignment: 4,
# CHECK-NEXT:     stack-id: default, callee-saved-register: '', callee-saved-restored: true,
# CHECK-NEXT:     local-offset: -4, debug-info-variable: '', debug-info-expression: '',
# CHECK-NEXT:     debug-info-location: '' }
# CHECK-NEXT: - { id: 1, name: '', type: spill-slot, offset: -16, size: 8, alignment: 16,
# CHECK-NEXT:     stack-id: default, callee-saved-register: '$x23', callee-saved-restored: true,
# CHECK-NEXT:     debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
# CHECK-NEXT: - { id: 2, name: '', type: spill-slot, offset: -24, size: 8, alignment: 8,
# CHECK-NEXT:     stack-id: default, callee-saved-register: '$x22', callee-saved-restored: true,
# CHECK-NEXT:     debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
# CHECK-NEXT: - { id: 3, name: '', type: spill-slot, offset: -32, size: 8, alignment: 8,
# CHECK-NEXT:     stack-id: default, callee-saved-register: '$x21', callee-saved-restored: true,
# CHECK-NEXT:     debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
# CHECK-NEXT: - { id: 4, name: '', type: spill-slot, offset: -40, size: 8, alignment: 8,
# CHECK-NEXT:     stack-id: default, callee-saved-register: '$x20', callee-saved-restored: true,
# CHECK-NEXT:     debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
# CHECK-NEXT: - { id: 5, name: '', type: spill-slot, offset: -48, size: 8, alignment: 8,
# CHECK-NEXT:     stack-id: default, callee-saved-register: '$x19', callee-saved-restored: true,
# CHECK-NEXT:     debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }

# CHECK:      early-clobber $sp = frame-setup STPXpre killed $x19, killed $x20, $sp, -6 :: (store (s64) into %stack.4), (store (s64) into %stack.5)
# CHECK-NEXT: frame-setup SEH_SaveRegP_X 19, 20, -48
# CHECK-NEXT: frame-setup STPXi killed $x21, killed $x22, $sp, 2 :: (store (s64) into %stack.2), (store (s64) into %stack.3)
# CHECK-NEXT: frame-setup SEH_SaveRegP 21, 22, 16
# CHECK-NEXT: frame-setup STRXui killed $x23, $sp, 4 :: (store (s64) into %stack.1)
# CHECK-NEXT: frame-setup SEH_SaveReg 23, 32
# CHECK-NEXT: frame-setup SEH_PrologEnd


...
---
name:            func
alignment:       4
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
registers:       []
liveins:         []
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    4
  adjustsStack:    false
  hasCalls:        false
  stackProtector:  ''
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  localFrameSize:  4
  savePoint:       ''
  restorePoint:    ''
fixedStack:      []
stack:
  - { id: 0, name: '', type: default, offset: 0, size: 4, alignment: 4,
      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
      local-offset: -4, debug-info-variable: '', debug-info-expression: '',
      debug-info-location: '' }
callSites:       []
constants:       []
machineFunctionInfo: {}
body:             |
  bb.0.entry:
    liveins: $x0, $x23, $x21, $x22, $x19, $x20

    renamable $x8 = ADDXri %stack.0, 0, 0
    $x19 = ADDXrr $x0, $x8
    $x20 = ADDXrr $x19, $x0
    $x21 = ADDXrr $x20, killed $x19
    $x22 = ADDXrr $x21, killed $x20
    $x23 = ADDXrr $x22, killed $x21
    $x0 = ADDXrr $x0, killed $x23

    RET_ReallyLR

...