# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
# RUN: llc -mtriple=aarch64 -run-pass=cfi-fixup %s -o - | FileCheck %s
--- |
define i32 @f0(i32 %x) #0 {
entry: br label %return
if.end: br label %return
if.then2: br label %return
if.else: br label %return
return:
ret i32 0
}
define i32 @f1(i32 %x) #0 {
entry: br label %return
if.end: br label %return
if.then2: br label %return
if.else: br label %return
return:
ret i32 0
}
define i32 @f2(i32 %x) #0 {
entry: br label %return
if.end: br label %return
if.then2: br label %return
if.else: br label %return
return:
ret i32 0
}
declare i32 @g(i32)
attributes #0 = { nounwind shadowcallstack uwtable "sign-return-address"="non-leaf" "target-features"="+reserve-x18" }
...
---
name: f0
alignment: 4
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
failsVerification: false
registers: []
liveins:
- { reg: '$w0', virtual-reg: '' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 16
offsetAdjustment: 0
maxAlignment: 16
adjustsStack: true
hasCalls: true
stackProtector: ''
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
hasTailCall: false
localFrameSize: 0
savePoint: ''
restorePoint: ''
fixedStack: []
stack:
- { id: 0, name: '', type: spill-slot, offset: -16, size: 8, alignment: 16,
stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites: []
debugValueSubstitutions: []
constants: []
machineFunctionInfo:
hasRedZone: false
body: |
; CHECK-LABEL: name: f0
; CHECK: bb.0.entry:
; CHECK-NEXT: successors: %bb.4(0x30000000), %bb.1(0x50000000)
; CHECK-NEXT: liveins: $w0, $lr, $x18
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: CBZW renamable $w0, %bb.4
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1.if.end:
; CHECK-NEXT: successors: %bb.3(0x30000000), %bb.2(0x50000000)
; CHECK-NEXT: liveins: $w0, $lr, $x18
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: early-clobber $x18 = frame-setup STRXpost $lr, $x18, 8
; CHECK-NEXT: frame-setup CFI_INSTRUCTION escape 0x16, 0x12, 0x02, 0x82, 0x78
; CHECK-NEXT: frame-setup PACIASP implicit-def $lr, implicit killed $lr, implicit $sp
; CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
; CHECK-NEXT: early-clobber $sp = frame-setup STRXpre killed $lr, $sp, -16 :: (store (s64) into %stack.0)
; CHECK-NEXT: frame-setup CFI_INSTRUCTION def_cfa_offset 16
; CHECK-NEXT: frame-setup CFI_INSTRUCTION offset $w30, -16
; CHECK-NEXT: CFI_INSTRUCTION remember_state
; CHECK-NEXT: TBNZW renamable $w0, 31, %bb.3
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2.if.else:
; CHECK-NEXT: successors: %bb.5(0x80000000)
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: renamable $w0 = nuw nsw ADDWri killed renamable $w0, 1, 0
; CHECK-NEXT: BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
; CHECK-NEXT: renamable $w8 = MOVZWi 1, 0
; CHECK-NEXT: $w0 = SUBWrs killed renamable $w8, killed renamable $w0, 0
; CHECK-NEXT: B %bb.5
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.3.if.then2:
; CHECK-NEXT: successors: %bb.5(0x80000000)
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: renamable $w0 = nsw SUBWri killed renamable $w0, 1, 0
; CHECK-NEXT: BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
; CHECK-NEXT: renamable $w0 = nsw ADDWri killed renamable $w0, 1, 0
; CHECK-NEXT: B %bb.5
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.4.return:
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: CFI_INSTRUCTION def_cfa $wsp, 0
; CHECK-NEXT: CFI_INSTRUCTION negate_ra_sign_state
; CHECK-NEXT: CFI_INSTRUCTION same_value $w18
; CHECK-NEXT: CFI_INSTRUCTION same_value $w30
; CHECK-NEXT: RET undef $lr, implicit killed $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.5.return:
; CHECK-NEXT: successors: %bb.7(0x80000000)
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: CFI_INSTRUCTION restore_state
; CHECK-NEXT: CFI_INSTRUCTION remember_state
; CHECK-NEXT: B %bb.7
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.6.return:
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: early-clobber $sp, $lr = frame-destroy LDRXpost $sp, 16 :: (load (s64) from %stack.0)
; CHECK-NEXT: frame-destroy CFI_INSTRUCTION def_cfa_offset 0
; CHECK-NEXT: frame-destroy AUTIASP implicit-def $lr, implicit killed $lr, implicit $sp
; CHECK-NEXT: frame-destroy CFI_INSTRUCTION negate_ra_sign_state
; CHECK-NEXT: early-clobber $x18, $lr = frame-destroy LDRXpre $x18, -8
; CHECK-NEXT: frame-destroy CFI_INSTRUCTION restore $w18
; CHECK-NEXT: frame-destroy CFI_INSTRUCTION restore $w30
; CHECK-NEXT: RET undef $lr, implicit killed $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.7.return:
; CHECK-NEXT: successors: %bb.6(0x80000000)
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: CFI_INSTRUCTION restore_state
; CHECK-NEXT: B %bb.6
bb.0.entry:
successors: %bb.4(0x30000000), %bb.1(0x50000000)
liveins: $w0, $lr, $x18
CBZW renamable $w0, %bb.4
bb.1.if.end:
successors: %bb.3(0x30000000), %bb.2(0x50000000)
liveins: $w0, $lr, $x18
early-clobber $x18 = frame-setup STRXpost $lr, $x18, 8
frame-setup CFI_INSTRUCTION escape 0x16, 0x12, 0x02, 0x82, 0x78
frame-setup PACIASP implicit-def $lr, implicit killed $lr, implicit $sp
frame-setup CFI_INSTRUCTION negate_ra_sign_state
early-clobber $sp = frame-setup STRXpre killed $lr, $sp, -16 :: (store (s64) into %stack.0)
frame-setup CFI_INSTRUCTION def_cfa_offset 16
frame-setup CFI_INSTRUCTION offset $w30, -16
TBNZW renamable $w0, 31, %bb.3
bb.2.if.else:
successors: %bb.5(0x80000000)
liveins: $w0
renamable $w0 = nuw nsw ADDWri killed renamable $w0, 1, 0
BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
renamable $w8 = MOVZWi 1, 0
$w0 = SUBWrs killed renamable $w8, killed renamable $w0, 0
B %bb.5
bb.3.if.then2:
successors: %bb.5(0x80000000)
liveins: $w0
renamable $w0 = nsw SUBWri killed renamable $w0, 1, 0
BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
renamable $w0 = nsw ADDWri killed renamable $w0, 1, 0
B %bb.5
bb.4.return:
liveins: $w0
RET undef $lr, implicit killed $w0
bb.5.return:
liveins: $w0
B %bb.6
bb.7.return:
liveins: $w0
early-clobber $sp, $lr = frame-destroy LDRXpost $sp, 16 :: (load (s64) from %stack.0)
frame-destroy CFI_INSTRUCTION def_cfa_offset 0
frame-destroy AUTIASP implicit-def $lr, implicit killed $lr, implicit $sp
frame-destroy CFI_INSTRUCTION negate_ra_sign_state
early-clobber $x18, $lr = frame-destroy LDRXpre $x18, -8
frame-destroy CFI_INSTRUCTION restore $w18
frame-destroy CFI_INSTRUCTION restore $w30
RET undef $lr, implicit killed $w0
bb.6.return:
liveins: $w0
B %bb.7
...
---
name: f1
alignment: 4
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
failsVerification: false
registers: []
liveins:
- { reg: '$w0', virtual-reg: '' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 16
offsetAdjustment: 0
maxAlignment: 16
adjustsStack: true
hasCalls: true
stackProtector: ''
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
hasTailCall: false
localFrameSize: 0
savePoint: ''
restorePoint: ''
fixedStack: []
stack:
- { id: 0, name: '', type: spill-slot, offset: -16, size: 8, alignment: 16,
stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites: []
debugValueSubstitutions: []
constants: []
machineFunctionInfo:
hasRedZone: false
body: |
; CHECK-LABEL: name: f1
; CHECK: bb.0.entry:
; CHECK-NEXT: successors: %bb.5(0x30000000), %bb.1(0x50000000)
; CHECK-NEXT: liveins: $w0, $lr, $x18
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: CBZW renamable $w0, %bb.5
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1.if.end:
; CHECK-NEXT: successors: %bb.3(0x30000000), %bb.2(0x50000000)
; CHECK-NEXT: liveins: $w0, $lr, $x18
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: early-clobber $x18 = frame-setup STRXpost $lr, $x18, 8
; CHECK-NEXT: frame-setup CFI_INSTRUCTION escape 0x16, 0x12, 0x02, 0x82, 0x78
; CHECK-NEXT: frame-setup PACIASP implicit-def $lr, implicit killed $lr, implicit $sp
; CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
; CHECK-NEXT: early-clobber $sp = frame-setup STRXpre killed $lr, $sp, -16 :: (store (s64) into %stack.0)
; CHECK-NEXT: frame-setup CFI_INSTRUCTION def_cfa_offset 16
; CHECK-NEXT: frame-setup CFI_INSTRUCTION offset $w30, -16
; CHECK-NEXT: TBNZW renamable $w0, 31, %bb.3
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2.if.else:
; CHECK-NEXT: successors: %bb.4(0x80000000)
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: renamable $w0 = nuw nsw ADDWri killed renamable $w0, 1, 0
; CHECK-NEXT: BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
; CHECK-NEXT: renamable $w8 = MOVZWi 1, 0
; CHECK-NEXT: $w0 = SUBWrs killed renamable $w8, killed renamable $w0, 0
; CHECK-NEXT: B %bb.4
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.3.if.then2:
; CHECK-NEXT: successors: %bb.4(0x80000000)
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: renamable $w0 = nsw SUBWri killed renamable $w0, 1, 0
; CHECK-NEXT: BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
; CHECK-NEXT: renamable $w0 = nsw ADDWri killed renamable $w0, 1, 0
; CHECK-NEXT: B %bb.4
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.4.return:
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: early-clobber $sp, $lr = frame-destroy LDRXpost $sp, 16 :: (load (s64) from %stack.0)
; CHECK-NEXT: frame-destroy CFI_INSTRUCTION def_cfa_offset 0
; CHECK-NEXT: frame-destroy AUTIASP implicit-def $lr, implicit killed $lr, implicit $sp
; CHECK-NEXT: frame-destroy CFI_INSTRUCTION negate_ra_sign_state
; CHECK-NEXT: early-clobber $x18, $lr = frame-destroy LDRXpre $x18, -8
; CHECK-NEXT: frame-destroy CFI_INSTRUCTION restore $w18
; CHECK-NEXT: frame-destroy CFI_INSTRUCTION restore $w30
; CHECK-NEXT: RET undef $lr, implicit killed $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.5.return:
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: RET undef $lr, implicit killed $w0
bb.0.entry:
successors: %bb.5(0x30000000), %bb.1(0x50000000)
liveins: $w0, $lr, $x18
CBZW renamable $w0, %bb.5
bb.1.if.end:
successors: %bb.3(0x30000000), %bb.2(0x50000000)
liveins: $w0, $lr, $x18
early-clobber $x18 = frame-setup STRXpost $lr, $x18, 8
frame-setup CFI_INSTRUCTION escape 0x16, 0x12, 0x02, 0x82, 0x78
frame-setup PACIASP implicit-def $lr, implicit killed $lr, implicit $sp
frame-setup CFI_INSTRUCTION negate_ra_sign_state
early-clobber $sp = frame-setup STRXpre killed $lr, $sp, -16 :: (store (s64) into %stack.0)
frame-setup CFI_INSTRUCTION def_cfa_offset 16
frame-setup CFI_INSTRUCTION offset $w30, -16
TBNZW renamable $w0, 31, %bb.3
bb.2.if.else:
successors: %bb.4(0x80000000)
liveins: $w0
renamable $w0 = nuw nsw ADDWri killed renamable $w0, 1, 0
BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
renamable $w8 = MOVZWi 1, 0
$w0 = SUBWrs killed renamable $w8, killed renamable $w0, 0
B %bb.4
bb.3.if.then2:
successors: %bb.4(0x80000000)
liveins: $w0
renamable $w0 = nsw SUBWri killed renamable $w0, 1, 0
BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
renamable $w0 = nsw ADDWri killed renamable $w0, 1, 0
B %bb.4
bb.4.return:
liveins: $w0
early-clobber $sp, $lr = frame-destroy LDRXpost $sp, 16 :: (load (s64) from %stack.0)
frame-destroy CFI_INSTRUCTION def_cfa_offset 0
frame-destroy AUTIASP implicit-def $lr, implicit killed $lr, implicit $sp
frame-destroy CFI_INSTRUCTION negate_ra_sign_state
early-clobber $x18, $lr = frame-destroy LDRXpre $x18, -8
frame-destroy CFI_INSTRUCTION restore $w18
frame-destroy CFI_INSTRUCTION restore $w30
RET undef $lr, implicit killed $w0
bb.5.return:
liveins: $w0
RET undef $lr, implicit killed $w0
...
---
name: f2
alignment: 4
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
failsVerification: false
registers: []
liveins:
- { reg: '$w0', virtual-reg: '' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 16
offsetAdjustment: 0
maxAlignment: 16
adjustsStack: true
hasCalls: true
stackProtector: ''
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
hasTailCall: false
localFrameSize: 0
savePoint: ''
restorePoint: ''
fixedStack: []
stack:
- { id: 0, name: '', type: spill-slot, offset: -16, size: 8, alignment: 16,
stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true,
debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
callSites: []
debugValueSubstitutions: []
constants: []
machineFunctionInfo:
hasRedZone: false
body: |
; CHECK-LABEL: name: f2
; CHECK: bb.0.entry:
; CHECK-NEXT: successors: %bb.5(0x30000000), %bb.1(0x50000000)
; CHECK-NEXT: liveins: $w0, $lr, $x18
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: CBZW renamable $w0, %bb.5
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.1.if.end:
; CHECK-NEXT: successors: %bb.3(0x30000000), %bb.2(0x50000000)
; CHECK-NEXT: liveins: $w0, $lr, $x18
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: early-clobber $x18 = frame-setup STRXpost $lr, $x18, 8
; CHECK-NEXT: frame-setup CFI_INSTRUCTION escape 0x16, 0x12, 0x02, 0x82, 0x78
; CHECK-NEXT: frame-setup PACIASP implicit-def $lr, implicit killed $lr, implicit $sp
; CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
; CHECK-NEXT: early-clobber $sp = frame-setup STRXpre killed $lr, $sp, -16 :: (store (s64) into %stack.0)
; CHECK-NEXT: frame-setup CFI_INSTRUCTION def_cfa_offset 16
; CHECK-NEXT: frame-setup CFI_INSTRUCTION offset $w30, -16
; CHECK-NEXT: TBNZW renamable $w0, 31, %bb.3
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.2.if.else:
; CHECK-NEXT: successors: %bb.4(0x80000000)
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: renamable $w0 = nuw nsw ADDWri killed renamable $w0, 1, 0
; CHECK-NEXT: BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
; CHECK-NEXT: renamable $w8 = MOVZWi 1, 0
; CHECK-NEXT: $w0 = SUBWrs killed renamable $w8, killed renamable $w0, 0
; CHECK-NEXT: B %bb.4
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.3.if.then2:
; CHECK-NEXT: successors: %bb.4(0x80000000)
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: renamable $w0 = nsw SUBWri killed renamable $w0, 1, 0
; CHECK-NEXT: BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
; CHECK-NEXT: renamable $w0 = nsw ADDWri killed renamable $w0, 1, 0
; CHECK-NEXT: B %bb.4
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.4.return:
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: early-clobber $sp, $lr = frame-destroy LDRXpost $sp, 16 :: (load (s64) from %stack.0)
; CHECK-NEXT: frame-destroy AUTIASP implicit-def $lr, implicit killed $lr, implicit $sp
; CHECK-NEXT: early-clobber $x18, $lr = frame-destroy LDRXpre $x18, -8
; CHECK-NEXT: RET undef $lr, implicit killed $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: bb.5.return:
; CHECK-NEXT: liveins: $w0
; CHECK-NEXT: {{ $}}
; CHECK-NEXT: CFI_INSTRUCTION def_cfa $wsp, 0
; CHECK-NEXT: CFI_INSTRUCTION negate_ra_sign_state
; CHECK-NEXT: CFI_INSTRUCTION same_value $w18
; CHECK-NEXT: CFI_INSTRUCTION same_value $w30
; CHECK-NEXT: RET undef $lr, implicit killed $w0
bb.0.entry:
successors: %bb.5(0x30000000), %bb.1(0x50000000)
liveins: $w0, $lr, $x18
CBZW renamable $w0, %bb.5
bb.1.if.end:
successors: %bb.3(0x30000000), %bb.2(0x50000000)
liveins: $w0, $lr, $x18
early-clobber $x18 = frame-setup STRXpost $lr, $x18, 8
frame-setup CFI_INSTRUCTION escape 0x16, 0x12, 0x02, 0x82, 0x78
frame-setup PACIASP implicit-def $lr, implicit killed $lr, implicit $sp
frame-setup CFI_INSTRUCTION negate_ra_sign_state
early-clobber $sp = frame-setup STRXpre killed $lr, $sp, -16 :: (store (s64) into %stack.0)
frame-setup CFI_INSTRUCTION def_cfa_offset 16
frame-setup CFI_INSTRUCTION offset $w30, -16
TBNZW renamable $w0, 31, %bb.3
bb.2.if.else:
successors: %bb.4(0x80000000)
liveins: $w0
renamable $w0 = nuw nsw ADDWri killed renamable $w0, 1, 0
BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
renamable $w8 = MOVZWi 1, 0
$w0 = SUBWrs killed renamable $w8, killed renamable $w0, 0
B %bb.4
bb.3.if.then2:
successors: %bb.4(0x80000000)
liveins: $w0
renamable $w0 = nsw SUBWri killed renamable $w0, 1, 0
BL @g, csr_aarch64_aapcs_scs, implicit-def dead $lr, implicit $sp, implicit killed $w0, implicit-def $sp, implicit-def $w0
renamable $w0 = nsw ADDWri killed renamable $w0, 1, 0
B %bb.4
bb.4.return:
liveins: $w0
early-clobber $sp, $lr = frame-destroy LDRXpost $sp, 16 :: (load (s64) from %stack.0)
frame-destroy AUTIASP implicit-def $lr, implicit killed $lr, implicit $sp
early-clobber $x18, $lr = frame-destroy LDRXpre $x18, -8
RET undef $lr, implicit killed $w0
bb.5.return:
liveins: $w0
RET undef $lr, implicit killed $w0
...