# RUN: llc -mtriple=aarch64-apple-darwin -run-pass=aarch64-ldst-opt  -verify-machineinstrs  -o - %s | FileCheck %s

--- |
  target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
  target triple = "arm64e-apple-ios13.0"
  
  %struct.widget = type { i64, i64, i32, i32, i64, i64, i64, i64, i64, i32, i32, i32, i16, i32, %struct.snork*, %struct.zot, %struct.zot, %struct.zot, %struct.zot, %struct.zot, i64, i64, i64, i32, i64, i32, i32, i32, i8*, %struct.baz, %struct.baz, i64, i64, %struct.snork*, %struct.zot, i32, i32, i32, i32, i32, i32, i32, [32 x i8], i64, i64, %struct.wombat, i32, i64, i64, i64, i64 }
  %struct.baz = type { [4 x i32] }
  %struct.snork = type { i32, i32, [1 x %struct.spam] }
  %struct.spam = type { %struct.baz, i32, i32 }
  %struct.zot = type { i64, i64 }
  %struct.wombat = type { [2 x i32] }
  %struct.wombat.0 = type { [200 x i32] }
  
  @__stack_chk_guard = external global i8*
  
  ; Function Attrs: noredzone ssp
  define hidden void @with_noredzone_80bytes() #0 {
  bb:
    %StackGuardSlot = alloca i8*, align 8
    %0 = call i8* @llvm.stackguard()
    call void @llvm.stackprotector(i8* %0, i8** %StackGuardSlot)
    %tmp = alloca %struct.widget, align 16
    %tmp1 = alloca %struct.wombat.0*, align 8
    %tmp2 = alloca %struct.wombat.0*, align 8
    %tmp3 = alloca %struct.wombat.0*, align 8
    %tmp4 = alloca %struct.wombat.0*, align 8
    store %struct.wombat.0* null, %struct.wombat.0** %tmp3, align 8
    store %struct.wombat.0* null, %struct.wombat.0** %tmp4, align 8
    ret void
  }

  define hidden void @with_redzone_480bytes() #2 {
  bb:
    %StackGuardSlot = alloca i8*, align 8
    %0 = call i8* @llvm.stackguard()
    call void @llvm.stackprotector(i8* %0, i8** %StackGuardSlot)
    %tmp = alloca %struct.widget, align 16
    %tmp1 = alloca %struct.wombat.0*, align 8
    %tmp2 = alloca %struct.wombat.0*, align 8
    %tmp3 = alloca %struct.wombat.0*, align 8
    %tmp4 = alloca %struct.wombat.0*, align 8
    store %struct.wombat.0* null, %struct.wombat.0** %tmp3, align 8
    store %struct.wombat.0* null, %struct.wombat.0** %tmp4, align 8
    ret void
  }

  define hidden void @with_noredzone_no_mem_between() #0 {
  bb:
    %StackGuardSlot = alloca i8*, align 8
    %0 = call i8* @llvm.stackguard()
    call void @llvm.stackprotector(i8* %0, i8** %StackGuardSlot)
    %tmp = alloca %struct.widget, align 16
    %tmp1 = alloca %struct.wombat.0*, align 8
    %tmp2 = alloca %struct.wombat.0*, align 8
    %tmp3 = alloca %struct.wombat.0*, align 8
    %tmp4 = alloca %struct.wombat.0*, align 8
    store %struct.wombat.0* null, %struct.wombat.0** %tmp3, align 8
    store %struct.wombat.0* null, %struct.wombat.0** %tmp4, align 8
    ret void
  }

  ; Function Attrs: nofree nosync nounwind willreturn
  declare i8* @llvm.stackguard() #1
  
  ; Function Attrs: nofree nosync nounwind willreturn
  declare void @llvm.stackprotector(i8*, i8**) #1
  
  attributes #0 = { noredzone ssp "frame-pointer"="non-leaf" }
  attributes #1 = { nofree nosync nounwind willreturn }
  attributes #2 = { ssp "frame-pointer"="non-leaf" }
...
# Check that we don't try to combine the SUB with the STP using pre-index addressing
# if the function does not have redzone enabled.
# CHECK-LABEL: name: with_noredzone_80bytes
# CHECK-NOT: STPXpre $xzr, $xzr
---
name:            with_noredzone_80bytes
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:       512
  offsetAdjustment: 0
  maxAlignment:    16
  adjustsStack:    true
  hasCalls:        true
  stackProtector:  '%stack.0.StackGuardSlot'
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  localFrameSize:  480
  savePoint:       ''
  restorePoint:    ''
fixedStack:      []
stack:
  - { id: 0, name: StackGuardSlot, type: default, offset: -40, size: 8, 
      alignment: 8, stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -8, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 1, name: tmp, type: default, offset: -480, size: 440, alignment: 16, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -448, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 2, name: tmp1, type: default, offset: -488, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -456, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 3, name: tmp2, type: default, offset: -496, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -464, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 4, name: tmp3, type: default, offset: -504, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -472, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 5, name: tmp4, type: default, offset: -512, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -480, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 6, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 7, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$fp', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 8, name: '', type: spill-slot, offset: -24, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$x27', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 9, name: '', type: spill-slot, offset: -32, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$x28', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites:       []
debugValueSubstitutions: []
constants:       []
machineFunctionInfo:
  hasRedZone:      false
body:             |
  bb.0.bb:
    successors: %bb.1(0x7ffff800), %bb.2(0x00000800)
    liveins: $x27, $x28, $lr
    early-clobber $sp = frame-setup STPXpre killed $x28, killed $x27, $sp, -4 :: (store (s64) into %stack.9), (store (s64) into %stack.8)
    frame-setup STPXi killed $fp, killed $lr, $sp, 2 :: (store (s64) into %stack.7), (store (s64) into %stack.6)
    $fp = frame-setup ADDXri $sp, 16, 0
    $sp = frame-setup SUBXri $sp, 80, 0
    frame-setup CFI_INSTRUCTION def_cfa $w29, 16
    frame-setup CFI_INSTRUCTION offset $w30, -8
    frame-setup CFI_INSTRUCTION offset $w29, -16
    frame-setup CFI_INSTRUCTION offset $w27, -24
    frame-setup CFI_INSTRUCTION offset $w28, -32
    $x8 = ADRP target-flags(aarch64-page, aarch64-got) @__stack_chk_guard
    $x8 = LDRXui killed $x8, target-flags(aarch64-pageoff, aarch64-got, aarch64-nc) @__stack_chk_guard
    $x8 = LDRXui killed $x8, 0 :: (dereferenceable invariant load (s64) from @__stack_chk_guard)
    STURXi killed renamable $x8, $fp, -24 :: (volatile store (s64) into %stack.0.StackGuardSlot)
    STRXui $xzr, $sp, 1 :: (store (s64) into %ir.tmp3)
    STRXui $xzr, $sp, 0 :: (store (s64) into %ir.tmp4)
    renamable $x8 = LDURXi $fp, -24 :: (volatile load (s64) from %stack.0.StackGuardSlot)
    $x9 = ADRP target-flags(aarch64-page, aarch64-got) @__stack_chk_guard
    $x9 = LDRXui killed $x9, target-flags(aarch64-pageoff, aarch64-got, aarch64-nc) @__stack_chk_guard
    $x9 = LDRXui killed $x9, 0 :: (dereferenceable invariant load (s64) from @__stack_chk_guard)
    $xzr = SUBSXrs killed renamable $x9, killed renamable $x8, 0, implicit-def $nzcv, implicit-def $nzcv
    Bcc 1, %bb.2, implicit $nzcv
  
  bb.1.bb:
    $sp = frame-destroy ADDXri $sp, 480, 0
    $fp, $lr = frame-destroy LDPXi $sp, 2 :: (load (s64) from %stack.7), (load (s64) from %stack.6)
    early-clobber $sp, $x28, $x27 = frame-destroy LDPXpost $sp, 4 :: (load (s64) from %stack.9), (load (s64) from %stack.8)
    RET undef $lr
  
  bb.2.bb:
    BL &__stack_chk_fail, csr_darwin_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp

...
# Check we don't try to fold a 480 byte offset, even if we have a 128 byte redzone.
# CHECK-LABEL: name: with_redzone_480bytes
# CHECK-NOT: STPXpre $xzr, $xzr
---
name:            with_redzone_480bytes
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:       512
  offsetAdjustment: 0
  maxAlignment:    16
  adjustsStack:    true
  hasCalls:        true
  stackProtector:  '%stack.0.StackGuardSlot'
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  localFrameSize:  480
  savePoint:       ''
  restorePoint:    ''
fixedStack:      []
stack:
  - { id: 0, name: StackGuardSlot, type: default, offset: -40, size: 8, 
      alignment: 8, stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -8, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 1, name: tmp, type: default, offset: -480, size: 440, alignment: 16, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -448, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 2, name: tmp1, type: default, offset: -488, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -456, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 3, name: tmp2, type: default, offset: -496, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -464, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 4, name: tmp3, type: default, offset: -504, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -472, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 5, name: tmp4, type: default, offset: -512, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -480, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 6, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 7, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$fp', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 8, name: '', type: spill-slot, offset: -24, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$x27', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 9, name: '', type: spill-slot, offset: -32, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$x28', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites:       []
debugValueSubstitutions: []
constants:       []
body:             |
  bb.0.bb:
    successors: %bb.1(0x7ffff800), %bb.2(0x00000800)
    liveins: $x27, $x28, $lr
    early-clobber $sp = frame-setup STPXpre killed $x28, killed $x27, $sp, -4 :: (store (s64) into %stack.9), (store (s64) into %stack.8)
    frame-setup STPXi killed $fp, killed $lr, $sp, 2 :: (store (s64) into %stack.7), (store (s64) into %stack.6)
    $fp = frame-setup ADDXri $sp, 16, 0
    $sp = frame-setup SUBXri $sp, 480, 0
    frame-setup CFI_INSTRUCTION def_cfa $w29, 16
    frame-setup CFI_INSTRUCTION offset $w30, -8
    frame-setup CFI_INSTRUCTION offset $w29, -16
    frame-setup CFI_INSTRUCTION offset $w27, -24
    frame-setup CFI_INSTRUCTION offset $w28, -32
    $x8 = ADRP target-flags(aarch64-page, aarch64-got) @__stack_chk_guard
    $x8 = LDRXui killed $x8, target-flags(aarch64-pageoff, aarch64-got, aarch64-nc) @__stack_chk_guard
    $x8 = LDRXui killed $x8, 0 :: (dereferenceable invariant load (s64) from @__stack_chk_guard)
    STURXi killed renamable $x8, $fp, -24 :: (volatile store (s64) into %stack.0.StackGuardSlot)
    STRXui $xzr, $sp, 1 :: (store (s64) into %ir.tmp3)
    STRXui $xzr, $sp, 0 :: (store (s64) into %ir.tmp4)
    renamable $x8 = LDURXi $fp, -24 :: (volatile load (s64) from %stack.0.StackGuardSlot)
    $x9 = ADRP target-flags(aarch64-page, aarch64-got) @__stack_chk_guard
    $x9 = LDRXui killed $x9, target-flags(aarch64-pageoff, aarch64-got, aarch64-nc) @__stack_chk_guard
    $x9 = LDRXui killed $x9, 0 :: (dereferenceable invariant load (s64) from @__stack_chk_guard)
    $xzr = SUBSXrs killed renamable $x9, killed renamable $x8, 0, implicit-def $nzcv, implicit-def $nzcv
    Bcc 1, %bb.2, implicit $nzcv
  
  bb.1.bb:
    $sp = frame-destroy ADDXri $sp, 480, 0
    $fp, $lr = frame-destroy LDPXi $sp, 2 :: (load (s64) from %stack.7), (load (s64) from %stack.6)
    early-clobber $sp, $x28, $x27 = frame-destroy LDPXpost $sp, 4 :: (load (s64) from %stack.9), (load (s64) from %stack.8)
    RET undef $lr
  
  bb.2.bb:
    BL &__stack_chk_fail, csr_darwin_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp

...
# Check we still do the opt if there are no mem ops between.
# CHECK-LABEL: name: with_noredzone_no_mem_between
# CHECK: STPXpre $xzr, $xzr
---
name:            with_noredzone_no_mem_between
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:       512
  offsetAdjustment: 0
  maxAlignment:    16
  adjustsStack:    true
  hasCalls:        true
  stackProtector:  '%stack.0.StackGuardSlot'
  maxCallFrameSize: 0
  cvBytesOfCalleeSavedRegisters: 0
  hasOpaqueSPAdjustment: false
  hasVAStart:      false
  hasMustTailInVarArgFunc: false
  localFrameSize:  480
  savePoint:       ''
  restorePoint:    ''
fixedStack:      []
stack:
  - { id: 0, name: StackGuardSlot, type: default, offset: -40, size: 8, 
      alignment: 8, stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -8, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 1, name: tmp, type: default, offset: -480, size: 440, alignment: 16, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -448, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 2, name: tmp1, type: default, offset: -488, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -456, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 3, name: tmp2, type: default, offset: -496, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -464, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 4, name: tmp3, type: default, offset: -504, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -472, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 5, name: tmp4, type: default, offset: -512, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '', callee-saved-restored: true, 
      local-offset: -480, debug-info-variable: '', debug-info-expression: '', 
      debug-info-location: '' }
  - { id: 6, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 7, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$fp', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 8, name: '', type: spill-slot, offset: -24, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$x27', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
  - { id: 9, name: '', type: spill-slot, offset: -32, size: 8, alignment: 8, 
      stack-id: default, callee-saved-register: '$x28', callee-saved-restored: true, 
      debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites:       []
debugValueSubstitutions: []
constants:       []
machineFunctionInfo:
  hasRedZone:      false
body:             |
  bb.0.bb:
    successors: %bb.1(0x7ffff800), %bb.2(0x00000800)
    liveins: $x27, $x28, $lr
    early-clobber $sp = frame-setup STPXpre killed $x28, killed $x27, $sp, -4 :: (store (s64) into %stack.9), (store (s64) into %stack.8)
    frame-setup STPXi killed $fp, killed $lr, $sp, 2 :: (store (s64) into %stack.7), (store (s64) into %stack.6)
    $fp = frame-setup ADDXri $sp, 16, 0
    $sp = frame-setup SUBXri $sp, 480, 0
    frame-setup CFI_INSTRUCTION def_cfa $w29, 16
    frame-setup CFI_INSTRUCTION offset $w30, -8
    frame-setup CFI_INSTRUCTION offset $w29, -16
    frame-setup CFI_INSTRUCTION offset $w27, -24
    frame-setup CFI_INSTRUCTION offset $w28, -32
    $x8 = ADRP target-flags(aarch64-page, aarch64-got) @__stack_chk_guard
    STRXui $xzr, $sp, 1 :: (store (s64) into %ir.tmp3)
    STRXui $xzr, $sp, 0 :: (store (s64) into %ir.tmp4)
    renamable $x8 = LDURXi $fp, -24 :: (volatile load (s64) from %stack.0.StackGuardSlot)
    $x9 = ADRP target-flags(aarch64-page, aarch64-got) @__stack_chk_guard
    $x9 = LDRXui killed $x9, target-flags(aarch64-pageoff, aarch64-got, aarch64-nc) @__stack_chk_guard
    $x9 = LDRXui killed $x9, 0 :: (dereferenceable invariant load (s64) from @__stack_chk_guard)
    $xzr = SUBSXrs killed renamable $x9, killed renamable $x8, 0, implicit-def $nzcv, implicit-def $nzcv
    Bcc 1, %bb.2, implicit $nzcv
  
  bb.1.bb:
    $sp = frame-destroy ADDXri $sp, 480, 0
    $fp, $lr = frame-destroy LDPXi $sp, 2 :: (load (s64) from %stack.7), (load (s64) from %stack.6)
    early-clobber $sp, $x28, $x27 = frame-destroy LDPXpost $sp, 4 :: (load (s64) from %stack.9), (load (s64) from %stack.8)
    RET undef $lr
  
  bb.2.bb:
    BL &__stack_chk_fail, csr_darwin_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit-def $sp

...