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# RUN: llc -o - %s -mtriple=aarch64-windows -start-before=prologepilog \
# RUN:   -stop-after=prologepilog | FileCheck %s
# Test that the frame lowering emits correct SEH updates for the case without
# a stack frame (e.g. no callee saved registers, no frame pointer, just locals)

# CHECK:      $sp = frame-setup SUBXri $sp, 16, 0
# CHECK-NEXT: frame-setup SEH_StackAlloc 16
# CHECK-NEXT: frame-setup SEH_PrologEnd
# CHECK:      frame-destroy SEH_EpilogStart
# CHECK-NEXT: $sp = frame-destroy ADDXri $sp, 16, 0
# CHECK-NEXT: frame-destroy SEH_StackAlloc 16
# CHECK-NEXT: frame-destroy SEH_EpilogEnd
# CHECK-NEXT: RET_ReallyLR implicit killed $w0

--- |
  target datalayout = "e-m:w-p:64:64-i32:32-i64:64-i128:128-n32:64-S128"
  target triple = "aarch64-unknown-windows-msvc19.11.0"

  ; Function Attrs: noinline nounwind optnone uwtable
  define dso_local i32 @"?func@@YAHH@Z"(i32 %a) #0 {
  entry:
    %a.addr = alloca i32, align 4
    %b = alloca i32, align 4
    store i32 %a, i32* %a.addr, align 4
    store i32 2, i32* %b, align 4
    %0 = load i32, i32* %b, align 4
    %1 = load i32, i32* %a.addr, align 4
    %add = add nsw i32 %0, %1
    ret i32 %add
  }

  attributes #0 = { noinline nounwind optnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="generic" "target-features"="+neon" "unsafe-fp-math"="false" "use-soft-float"="false" }

...
---
name:            '?func@@YAHH@Z'
alignment:       2
exposesReturnsTwice: false
legalized:       true
regBankSelected: true
selected:        true
failedISel:      false
tracksRegLiveness: true
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:  8
  savePoint:       ''
  restorePoint:    ''
fixedStack:
stack:
  - { id: 0, name: a.addr, 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: '' }
  - { id: 1, name: b, type: default, offset: 0, size: 4, alignment: 4,
      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
      local-offset: -8, debug-info-variable: '', debug-info-expression: '',
      debug-info-location: '' }
constants:
body:             |
  bb.1.entry:
    liveins: $w0

    renamable $w8 = MOVi32imm 2
    STRWui killed renamable $w0, %stack.0.a.addr, 0 :: (store 4 into %ir.a.addr)
    STRWui killed renamable $w8, %stack.1.b, 0 :: (store 4 into %ir.b)
    renamable $w8 = LDRWui %stack.1.b, 0 :: (load 4 from %ir.b)
    renamable $w0 = LDRWui %stack.0.a.addr, 0 :: (load 4 from %ir.a.addr)
    renamable $w0 = nsw ADDWrr killed renamable $w8, killed renamable $w0
    RET_ReallyLR implicit killed $w0

...