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merged 3 commits into from
May 6, 2025
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[AArch64] Correct position of CFI Instruction for Pointer Authentication #137795

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6ee1738
Revert "[AArch64] Correct position of CFI Instruction for Pointer Aut…
DanielKristofKiss Apr 29, 2025
aba0b83
Let's revert only the non-pauth-lr operations.
DanielKristofKiss May 5, 2025
dfee50c
clang format
DanielKristofKiss May 5, 2025
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10 changes: 8 additions & 2 deletions llvm/lib/Target/AArch64/AArch64PointerAuth.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -139,12 +139,15 @@ void AArch64PointerAuth::signLR(MachineFunction &MF,
->setPreInstrSymbol(MF, MFnI.getSigningInstrLabel());
} else {
BuildPACM(*Subtarget, MBB, MBBI, DL, MachineInstr::FrameSetup);
emitPACCFI(MBB, MBBI, MachineInstr::FrameSetup, EmitCFI);
if (MFnI.branchProtectionPAuthLR())
emitPACCFI(MBB, MBBI, MachineInstr::FrameSetup, EmitCFI);
BuildMI(MBB, MBBI, DL,
TII->get(MFnI.shouldSignWithBKey() ? AArch64::PACIBSP
: AArch64::PACIASP))
.setMIFlag(MachineInstr::FrameSetup)
->setPreInstrSymbol(MF, MFnI.getSigningInstrLabel());
if (!MFnI.branchProtectionPAuthLR())
emitPACCFI(MBB, MBBI, MachineInstr::FrameSetup, EmitCFI);
}

if (!EmitCFI && NeedsWinCFI) {
Expand Down Expand Up @@ -206,10 +209,13 @@ void AArch64PointerAuth::authenticateLR(
.setMIFlag(MachineInstr::FrameDestroy);
} else {
BuildPACM(*Subtarget, MBB, MBBI, DL, MachineInstr::FrameDestroy, PACSym);
emitPACCFI(MBB, MBBI, MachineInstr::FrameDestroy, EmitAsyncCFI);
if (MFnI->branchProtectionPAuthLR())
emitPACCFI(MBB, MBBI, MachineInstr::FrameDestroy, EmitAsyncCFI);
BuildMI(MBB, MBBI, DL,
TII->get(UseBKey ? AArch64::AUTIBSP : AArch64::AUTIASP))
.setMIFlag(MachineInstr::FrameDestroy);
if (!MFnI->branchProtectionPAuthLR())
emitPACCFI(MBB, MBBI, MachineInstr::FrameDestroy, EmitAsyncCFI);
}

if (NeedsWinCFI) {
Expand Down
2 changes: 1 addition & 1 deletion llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-cfi.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -9,9 +9,9 @@ define void @a() "sign-return-address"="all" "sign-return-address-key"="b_key" {
; CHECK-LABEL: a: // @a
; CHECK: // %bb.0:
; CHECK-NEXT: .cfi_b_key_frame
; CHECK-NEXT: .cfi_negate_ra_state
; V8A-NEXT: hint #27
; V83A-NEXT: pacibsp
; CHECK-NEXT: .cfi_negate_ra_state
%1 = alloca i32, align 4
%2 = alloca i32, align 4
%3 = alloca i32, align 4
Expand Down
12 changes: 6 additions & 6 deletions llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-diff-scope-same-key.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -5,9 +5,9 @@

define void @a() "sign-return-address"="all" {
; CHECK-LABEL: a: // @a
; CHECK: .cfi_negate_ra_state
; V8A-NEXT: hint #25
; V83A-NEXT: paciasp
; V8A: hint #25
; V83A: paciasp
; CHECK-NEXT: .cfi_negate_ra_state
%1 = alloca i32, align 4
%2 = alloca i32, align 4
%3 = alloca i32, align 4
Expand Down Expand Up @@ -52,9 +52,9 @@ define void @b() "sign-return-address"="non-leaf" {

define void @c() "sign-return-address"="all" {
; CHECK-LABEL: c: // @c
; CHECK: .cfi_negate_ra_state
; V8A-NEXT: hint #25
; V83A-NEXT: paciasp
; V8A: hint #25
; V83A: paciasp
; CHECK-NEXT .cfi_negate_ra_state
%1 = alloca i32, align 4
%2 = alloca i32, align 4
%3 = alloca i32, align 4
Expand Down
12 changes: 6 additions & 6 deletions llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-non-leaf.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -8,8 +8,8 @@ define i64 @a(i64 %x) "sign-return-address"="non-leaf" "sign-return-address-key"
; V8A-LABEL: a:
; V8A: // %bb.0:
; V8A-NEXT: .cfi_b_key_frame
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: hint #27
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: sub sp, sp, #32
; V8A-NEXT: str x30, [sp, #16] // 8-byte Folded Spill
; V8A-NEXT: .cfi_def_cfa_offset 32
Expand All @@ -26,8 +26,8 @@ define i64 @a(i64 %x) "sign-return-address"="non-leaf" "sign-return-address-key"
; V83A-LABEL: a:
; V83A: // %bb.0:
; V83A-NEXT: .cfi_b_key_frame
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: pacibsp
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: sub sp, sp, #32
; V83A-NEXT: str x30, [sp, #16] // 8-byte Folded Spill
; V83A-NEXT: .cfi_def_cfa_offset 32
Expand Down Expand Up @@ -59,8 +59,8 @@ define i64 @b(i64 %x) "sign-return-address"="non-leaf" "sign-return-address-key"
; V8A-LABEL: b:
; V8A: // %bb.0:
; V8A-NEXT: .cfi_b_key_frame
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: hint #27
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: sub sp, sp, #32
; V8A-NEXT: str x30, [sp, #16] // 8-byte Folded Spill
; V8A-NEXT: .cfi_def_cfa_offset 32
Expand All @@ -77,8 +77,8 @@ define i64 @b(i64 %x) "sign-return-address"="non-leaf" "sign-return-address-key"
; V83A-LABEL: b:
; V83A: // %bb.0:
; V83A-NEXT: .cfi_b_key_frame
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: pacibsp
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: sub sp, sp, #32
; V83A-NEXT: str x30, [sp, #16] // 8-byte Folded Spill
; V83A-NEXT: .cfi_def_cfa_offset 32
Expand Down Expand Up @@ -110,8 +110,8 @@ define i64 @c(i64 %x) "sign-return-address"="non-leaf" "sign-return-address-key"
; V8A-LABEL: c:
; V8A: // %bb.0:
; V8A-NEXT: .cfi_b_key_frame
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: hint #27
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: sub sp, sp, #32
; V8A-NEXT: str x30, [sp, #16] // 8-byte Folded Spill
; V8A-NEXT: .cfi_def_cfa_offset 32
Expand All @@ -128,8 +128,8 @@ define i64 @c(i64 %x) "sign-return-address"="non-leaf" "sign-return-address-key"
; V83A-LABEL: c:
; V83A: // %bb.0:
; V83A-NEXT: .cfi_b_key_frame
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: pacibsp
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: sub sp, sp, #32
; V83A-NEXT: str x30, [sp, #16] // 8-byte Folded Spill
; V83A-NEXT: .cfi_def_cfa_offset 32
Expand Down
2 changes: 1 addition & 1 deletion llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-regsave.mir
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Original file line number Diff line number Diff line change
Expand Up @@ -81,8 +81,8 @@ body: |
# CHECK: name: bar
# CHECK: bb.0:
# CHECK: frame-setup EMITBKEY
# CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: frame-setup PACIBSP implicit-def $lr, implicit $lr, implicit $sp
# CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NOT: OUTLINED_FUNCTION_
# CHECK: bb.1:
# CHECK-NOT: OUTLINED_FUNCTION_
Expand Down
12 changes: 6 additions & 6 deletions llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-same-scope-diff-key.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -7,8 +7,8 @@
define void @a() "sign-return-address"="all" {
; V8A-LABEL: a:
; V8A: // %bb.0:
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: hint #25
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: sub sp, sp, #32
; V8A-NEXT: .cfi_def_cfa_offset 32
; V8A-NEXT: mov w8, #1 // =0x1
Expand All @@ -26,8 +26,8 @@ define void @a() "sign-return-address"="all" {
;
; V83A-LABEL: a:
; V83A: // %bb.0:
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: paciasp
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: sub sp, sp, #32
; V83A-NEXT: .cfi_def_cfa_offset 32
; V83A-NEXT: mov w8, #1 // =0x1
Expand Down Expand Up @@ -60,8 +60,8 @@ define void @b() "sign-return-address"="all" "sign-return-address-key"="b_key" {
; V8A-LABEL: b:
; V8A: // %bb.0:
; V8A-NEXT: .cfi_b_key_frame
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: hint #27
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: sub sp, sp, #32
; V8A-NEXT: .cfi_def_cfa_offset 32
; V8A-NEXT: mov w8, #1 // =0x1
Expand All @@ -80,8 +80,8 @@ define void @b() "sign-return-address"="all" "sign-return-address-key"="b_key" {
; V83A-LABEL: b:
; V83A: // %bb.0:
; V83A-NEXT: .cfi_b_key_frame
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: pacibsp
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: sub sp, sp, #32
; V83A-NEXT: .cfi_def_cfa_offset 32
; V83A-NEXT: mov w8, #1 // =0x1
Expand Down Expand Up @@ -113,8 +113,8 @@ define void @b() "sign-return-address"="all" "sign-return-address-key"="b_key" {
define void @c() "sign-return-address"="all" {
; V8A-LABEL: c:
; V8A: // %bb.0:
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: hint #25
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: sub sp, sp, #32
; V8A-NEXT: .cfi_def_cfa_offset 32
; V8A-NEXT: mov w8, #1 // =0x1
Expand All @@ -132,8 +132,8 @@ define void @c() "sign-return-address"="all" {
;
; V83A-LABEL: c:
; V83A: // %bb.0:
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: paciasp
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: sub sp, sp, #32
; V83A-NEXT: .cfi_def_cfa_offset 32
; V83A-NEXT: mov w8, #1 // =0x1
Expand Down
34 changes: 17 additions & 17 deletions llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-sp-mod.mir
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Original file line number Diff line number Diff line change
Expand Up @@ -86,11 +86,11 @@ body: |
# CHECK: body: |
# CHECK-NEXT: bb.0 (%ir-block.0):
# CHECK-NEXT: liveins: $lr
# CHECK: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: frame-setup PACIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK: frame-setup PACIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK: BL @[[OUTLINED_FUNC:OUTLINED_FUNCTION_[0-9]+]]
# CHECK: frame-destroy CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: frame-destroy AUTIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK: frame-destroy AUTIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK-NEXT: frame-destroy CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: RET undef $lr

...
Expand Down Expand Up @@ -119,11 +119,11 @@ body: |
# CHECK: body: |
# CHECK-NEXT: bb.0 (%ir-block.0):
# CHECK-NEXT: liveins: $lr
# CHECK: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: frame-setup PACIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK: frame-setup PACIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK: BL @[[OUTLINED_FUNC]]
# CHECK: frame-destroy CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: frame-destroy AUTIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK: frame-destroy AUTIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK-NEXT: frame-destroy CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: RET undef $lr

...
Expand Down Expand Up @@ -174,22 +174,22 @@ body: |
# CHECK: body: |
# CHECK-NEXT: bb.0 (%ir-block.0):
# CHECK-NEXT: liveins: $lr
# CHECK: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: frame-setup PACIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK: frame-setup PACIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NOT: BL @OUTLINED_FUNCTION_{{.*}}
# CHECK: frame-destroy CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: frame-destroy AUTIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK: frame-destroy AUTIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK-NEXT: frame-destroy CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: RET undef $lr

# CHECK-LABEL: name: illegal1
# CHECK: body: |
# CHECK-NEXT: bb.0 (%ir-block.0):
# CHECK-NEXT: liveins: $lr
# CHECK: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: frame-setup PACIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK: frame-setup PACIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NOT: BL @OUTLINED_FUNCTION_{{.*}}
# CHECK: frame-destroy CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: frame-destroy AUTIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK: frame-destroy AUTIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK-NEXT: frame-destroy CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: RET undef $lr

# Outlined function that contains only legal sp modifications
Expand All @@ -198,8 +198,8 @@ body: |
# CHECK-NEXT: bb.0:
# CHECK-NEXT: liveins: $lr
# CHECK-NEXT: {{^ $}}
# CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: frame-setup PACIASP implicit-def $lr, implicit $lr, implicit $sp
# CHECK-NEXT: frame-setup CFI_INSTRUCTION negate_ra_sign_state
# CHECK-NEXT: $sp = frame-setup SUBXri $sp, 16, 0
# CHECK: $sp = frame-destroy ADDXri $sp, 16, 0
# CHECK-NEXT: frame-destroy AUTIASP implicit-def $lr, implicit $lr, implicit $sp
Expand Down
6 changes: 3 additions & 3 deletions llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-subtarget.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -9,8 +9,8 @@ define void @a() #0 {
; CHECK-LABEL: a: // @a
; CHECK: // %bb.0:
; CHECK-NEXT: .cfi_b_key_frame
; CHECK-NEXT: .cfi_negate_ra_state
; CHECK-NEXT: pacibsp
; CHECK-NEXT: .cfi_negate_ra_state
; CHECK-NOT: OUTLINED_FUNCTION_
%1 = alloca i32, align 4
%2 = alloca i32, align 4
Expand All @@ -33,8 +33,8 @@ define void @b() #0 {
; CHECK-LABEL: b: // @b
; CHECK: // %bb.0:
; CHECK-NEXT: .cfi_b_key_frame
; CHECK-NEXT: .cfi_negate_ra_state
; CHECK-NEXT: pacibsp
; CHECK-NEXT: .cfi_negate_ra_state
; CHECK-NOT: OUTLINED_FUNCTION_
%1 = alloca i32, align 4
%2 = alloca i32, align 4
Expand All @@ -57,8 +57,8 @@ define void @c() #1 {
; CHECK-LABEL: c: // @c
; CHECK: // %bb.0:
; CHECK-NEXT: .cfi_b_key_frame
; CHECK-NEXT: .cfi_negate_ra_state
; CHECK-NEXT: hint #27
; CHECK-NEXT: .cfi_negate_ra_state
; CHECK-NOT: OUTLINED_FUNCTION_
%1 = alloca i32, align 4
%2 = alloca i32, align 4
Expand Down
18 changes: 8 additions & 10 deletions llvm/test/CodeGen/AArch64/machine-outliner-retaddr-sign-thunk.ll
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Original file line number Diff line number Diff line change
Expand Up @@ -10,8 +10,8 @@ declare i32 @thunk_called_fn(i32, i32, i32, i32)
define i32 @a() #0 {
; V8A-LABEL: a:
; V8A: // %bb.0: // %entry
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: hint #25
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; V8A-NEXT: .cfi_def_cfa_offset 16
; V8A-NEXT: .cfi_offset w30, -16
Expand All @@ -27,8 +27,8 @@ define i32 @a() #0 {
;
; V83A-LABEL: a:
; V83A: // %bb.0: // %entry
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: paciasp
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; V83A-NEXT: .cfi_def_cfa_offset 16
; V83A-NEXT: .cfi_offset w30, -16
Expand All @@ -49,8 +49,8 @@ entry:
define i32 @b() #0 {
; V8A-LABEL: b:
; V8A: // %bb.0: // %entry
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: hint #25
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; V8A-NEXT: .cfi_def_cfa_offset 16
; V8A-NEXT: .cfi_offset w30, -16
Expand All @@ -66,8 +66,8 @@ define i32 @b() #0 {
;
; V83A-LABEL: b:
; V83A: // %bb.0: // %entry
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: paciasp
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; V83A-NEXT: .cfi_def_cfa_offset 16
; V83A-NEXT: .cfi_offset w30, -16
Expand All @@ -88,8 +88,8 @@ entry:
define hidden i32 @c(ptr %fptr) #0 {
; V8A-LABEL: c:
; V8A: // %bb.0: // %entry
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: hint #25
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; V8A-NEXT: .cfi_def_cfa_offset 16
; V8A-NEXT: .cfi_offset w30, -16
Expand All @@ -106,8 +106,8 @@ define hidden i32 @c(ptr %fptr) #0 {
;
; V83A-LABEL: c:
; V83A: // %bb.0: // %entry
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: paciasp
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; V83A-NEXT: .cfi_def_cfa_offset 16
; V83A-NEXT: .cfi_offset w30, -16
Expand All @@ -129,8 +129,8 @@ entry:
define hidden i32 @d(ptr %fptr) #0 {
; V8A-LABEL: d:
; V8A: // %bb.0: // %entry
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: hint #25
; V8A-NEXT: .cfi_negate_ra_state
; V8A-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; V8A-NEXT: .cfi_def_cfa_offset 16
; V8A-NEXT: .cfi_offset w30, -16
Expand All @@ -147,8 +147,8 @@ define hidden i32 @d(ptr %fptr) #0 {
;
; V83A-LABEL: d:
; V83A: // %bb.0: // %entry
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: paciasp
; V83A-NEXT: .cfi_negate_ra_state
; V83A-NEXT: str x30, [sp, #-16]! // 8-byte Folded Spill
; V83A-NEXT: .cfi_def_cfa_offset 16
; V83A-NEXT: .cfi_offset w30, -16
Expand Down Expand Up @@ -176,5 +176,3 @@ attributes #0 = { "sign-return-address"="non-leaf" minsize }
; CHECK-NOT: .cfi_negate_ra_state
; CHECK-NOT: auti{{[a,b]}}sp
; CHECK-NOT: hint #{{[29,31]}}
;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
; CHECK: {{.*}}
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