llvm-project/llvm/test/CodeGen/AArch64/wineh-frame5.mir

# RUN: llc -o - %s -mtriple=aarch64-windows -start-before=prologepilog \
# RUN:   -stop-after=prologepilog | FileCheck %s
# Check multiple epilogues, save_reg, save_reg_x.

# CHECK-LABEL:   bb.0.entry:
# CHECK:         early-clobber $sp = frame-setup STRXpre killed $x28, $sp, -32
# CHECK-NEXT:    frame-setup SEH_SaveReg_X 28, -32
# CHECK-NEXT:    frame-setup STRXui killed $x19, $sp, 1
# CHECK-NEXT:    frame-setup SEH_SaveReg 19, 8
# CHECK-NEXT:    frame-setup STRXui killed $lr, $sp, 2
# CHECK-NEXT:    frame-setup SEH_SaveReg 30, 16
# CHECK-NEXT:    $sp = frame-setup SUBXri $sp, 496, 0
# CHECK-NEXT:    frame-setup SEH_StackAlloc 496
# CHECK-NEXT:    frame-setup SEH_PrologEnd

# CHECK-LABEL:   bb.1.if.then:
# CHECK:         frame-destroy SEH_EpilogStart
# CHECK-NEXT:    $sp = frame-destroy ADDXri $sp, 496, 0
# CHECK-NEXT:    frame-destroy SEH_StackAlloc 496
# CHECK-NEXT:    $lr = frame-destroy LDRXui $sp, 2
# CHECK-NEXT:    frame-destroy SEH_SaveReg 30, 16
# CHECK-NEXT:    $x19 = frame-destroy LDRXui $sp, 1
# CHECK-NEXT:    frame-destroy SEH_SaveReg 19, 8
# CHECK-NEXT:    early-clobber $sp, $x28 = frame-destroy LDRXpost $sp, 32
# CHECK-NEXT:    frame-destroy SEH_SaveReg_X 28, -32
# CHECK-NEXT:    frame-destroy SEH_EpilogEnd
# CHECK-NEXT:    TCRETURNdi @"?func2@@YAHXZ", 0, csr_aarch64_aapcs, implicit $sp


--- |
  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"

  define dso_local i32 @"?func@@YAHH@Z"(i32 %i) local_unnamed_addr #0 {
  entry:
    %B = alloca [123 x i32], align 4
    %call = tail call i32 @"?func2@@YAHXZ"()
    %cmp = icmp sgt i32 %i, 2
    br i1 %cmp, label %if.then, label %if.else

  if.then:                                          ; preds = %entry
    %call1 = tail call i32 @"?func2@@YAHXZ"()
    ret i32 %call1

  if.else:                                          ; preds = %entry
    %0 = bitcast [123 x i32]* %B to i8*
    call void @llvm.lifetime.start.p0i8(i64 492, i8* nonnull %0) #3
    %arraydecay7 = bitcast [123 x i32]* %B to i32*
    %call2 = call i32 @"?func3@@YAHPEAH@Z"(i32* nonnull %arraydecay7)
    call void @llvm.lifetime.end.p0i8(i64 492, i8* nonnull %0) #3
    ret i32 %call2
  }

  ; Function Attrs: argmemonly nounwind
  declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1

  declare dso_local i32 @"?func2@@YAHXZ"() local_unnamed_addr #2

  declare dso_local i32 @"?func3@@YAHPEAH@Z"(i32*) local_unnamed_addr #2

  ; Function Attrs: argmemonly nounwind
  declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1

  ; Function Attrs: nounwind
  declare void @llvm.stackprotector(i8*, i8**) #3

  attributes #0 = { "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" }
  attributes #1 = { argmemonly nounwind }
  attributes #2 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="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" }
  attributes #3 = { nounwind }

...
---
name:            '?func@@YAHH@Z'
alignment:       2
exposesReturnsTwice: false
legalized:       false
regBankSelected: false
selected:        false
failedISel:      false
tracksRegLiveness: true
hasWinCFI:       false
registers:
liveins:
  - { reg: '$w0', virtual-reg: '' }
frameInfo:
  isFrameAddressTaken: false
  isReturnAddressTaken: false
  hasStackMap:     false
  hasPatchPoint:   false
  stackSize:       0
  offsetAdjustment: 0
  maxAlignment:    4
  adjustsStack:    true
  hasCalls:        true
  stackProtector:  ''
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  localFrameSize:  492
  savePoint:       ''
  restorePoint:    ''
fixedStack:
stack:
  - { id: 0, name: B, type: default, offset: 0, size: 492, alignment: 4,
      stack-id: default, callee-saved-register: '', callee-saved-restored: true,
      local-offset: -492, debug-info-variable: '', debug-info-expression: '',
      debug-info-location: '' }
constants:
body:             |
  bb.0.entry:
    successors: %bb.1(0x40000000), %bb.2(0x40000000)
    liveins: $w0

    renamable $w19 = COPY $w0
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    BL @"?func2@@YAHXZ", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp, implicit-def dead $w0
    ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
    dead $wzr = SUBSWri killed renamable $w19, 3, 0, implicit-def $nzcv
    Bcc 11, %bb.2, implicit killed $nzcv
    B %bb.1

  bb.1.if.then:
    TCRETURNdi @"?func2@@YAHXZ", 0, csr_aarch64_aapcs, implicit $sp

  bb.2.if.else:
    ADJCALLSTACKDOWN 0, 0, implicit-def dead $sp, implicit $sp
    $x0 = ADDXri %stack.0.B, 0, 0
    BL @"?func3@@YAHPEAH@Z", csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit $x0, implicit-def $sp, implicit-def $w0
    ADJCALLSTACKUP 0, 0, implicit-def dead $sp, implicit $sp
    RET_ReallyLR implicit $w0

...