208 lines
6.5 KiB
LLVM
208 lines
6.5 KiB
LLVM
; RUN: llc --force-dwarf-frame-section %s -o - | FileCheck %s
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; RUN: llc --filetype=obj %s -o - | llvm-readelf -s --unwind - | FileCheck %s --check-prefix=UNWIND
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target datalayout = "e-m:e-p:32:32-Fi8-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "thumbv7m-arm-none-eabi"
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; C++, -Oz
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; __attribute__((noinline)) int h(int a, int b) {
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; if (a < 0)
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; throw 1;
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; return a + b;
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; }
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;
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; int f(int a, int b, int c, int d) {
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; if (a < 0)
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; return -1;
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; a = h(a, b);
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; return 2 + a * (a + b) / (c + d);
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; }
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;
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; int g(int a, int b, int c, int d) {
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; if (a < 0)
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; return -1;
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; a = h(a, b);
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; return 1 + a * (a + b) / (c + d);
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; }
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@_ZTIi = external dso_local constant ptr
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define hidden i32 @_Z1hii(i32 %a, i32 %b) local_unnamed_addr #0 {
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entry:
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%cmp = icmp slt i32 %a, 0
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br i1 %cmp, label %if.then, label %if.end
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if.then: ; preds = %entry
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%exception = tail call ptr @__cxa_allocate_exception(i32 4) #1
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store i32 1, ptr %exception, align 8
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tail call void @__cxa_throw(ptr %exception, ptr @_ZTIi, ptr null) #2
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unreachable
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if.end: ; preds = %entry
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%add = add nsw i32 %b, %a
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ret i32 %add
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}
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; CHECK-LABEL: _Z1hii:
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; ...
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; CHECK: pac r12, lr, sp
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; CHECK-NEXT: .save {r7, lr}
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; CHECK-NEXT: push {r7, lr}
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: .cfi_offset lr, -4
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; CHECK-NEXT: .cfi_offset r7, -8
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; CHECK-NEXT: .save {ra_auth_code}
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; CHECK-NEXT: str r12, [sp, #-4]!
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; CHECK-NEXT: .cfi_def_cfa_offset 12
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; CHECK-NEXT: .cfi_offset ra_auth_code, -12
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; CHECK-NEXT: .pad #4
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; CHECK-NEXT: sub sp, #4
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; ...
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; CHECK-NOT: pac
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; CHECK: aut
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; CHECK: .cfi_endproc
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declare dso_local ptr @__cxa_allocate_exception(i32) local_unnamed_addr
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declare dso_local void @__cxa_throw(ptr, ptr, ptr) local_unnamed_addr
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define hidden i32 @_Z1fiiii(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr #0 {
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entry:
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%cmp = icmp slt i32 %a, 0
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br i1 %cmp, label %return, label %if.end
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if.end: ; preds = %entry
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%call = tail call i32 @_Z1hii(i32 %a, i32 %b)
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%add = add nsw i32 %call, %b
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%mul = mul nsw i32 %add, %call
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%add1 = add nsw i32 %d, %c
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%div = sdiv i32 %mul, %add1
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%add2 = add nsw i32 %div, 2
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br label %return
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return: ; preds = %entry, %if.end
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%retval.0 = phi i32 [ %add2, %if.end ], [ -1, %entry ]
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ret i32 %retval.0
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}
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; CHECK-LABEL: _Z1fiiii:
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; ...
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; CHECK: pac r12, lr, sp
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; CHECK-NEXT: .save {r4, r5, r6, lr}
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; CHECK-NEXT: push {r4, r5, r6, lr}
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .cfi_offset lr, -4
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; CHECK-NEXT: .cfi_offset r6, -8
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; CHECK-NEXT: .cfi_offset r5, -12
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; CHECK-NEXT: .cfi_offset r4, -16
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; CHECK-NEXT: .save {ra_auth_code}
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; CHECK-NEXT: str r12, [sp, #-4]!
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; CHECK-NEXT: .cfi_def_cfa_offset 20
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; CHECK-NEXT: .cfi_offset ra_auth_code, -20
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; CHECK-NEXT: .pad #4
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; CHECK-NEXT: sub sp, #4
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; CHECK-NEXT: .cfi_def_cfa_offset 24
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; ...
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; CHECK: bl OUTLINED_FUNCTION_0
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; ...
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; CHECK: add sp, #4
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; CHECK-NEXT: ldr r12, [sp], #4
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; CHECK-NEXT: pop.w {r4, r5, r6, lr}
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; CHECK-NEXT: aut r12, lr, sp
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; CHECK-NEXT: bx lr
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define hidden i32 @_Z1giiii(i32 %a, i32 %b, i32 %c, i32 %d) local_unnamed_addr #0 {
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entry:
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%cmp = icmp slt i32 %a, 0
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br i1 %cmp, label %return, label %if.end
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if.end: ; preds = %entry
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%call = tail call i32 @_Z1hii(i32 %a, i32 %b)
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%add = add nsw i32 %call, %b
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%mul = mul nsw i32 %add, %call
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%add1 = add nsw i32 %d, %c
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%div = sdiv i32 %mul, %add1
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%add2 = add nsw i32 %div, 1
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br label %return
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return: ; preds = %entry, %if.end
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%retval.0 = phi i32 [ %add2, %if.end ], [ -1, %entry ]
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ret i32 %retval.0
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}
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; CHECK-LABEL: _Z1giiii:
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; ...
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; CHECK: pac r12, lr, sp
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; CHECK-NEXT: .save {r4, r5, r6, lr}
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; CHECK-NEXT: push {r4, r5, r6, lr}
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .cfi_offset lr, -4
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; CHECK-NEXT: .cfi_offset r6, -8
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; CHECK-NEXT: .cfi_offset r5, -12
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; CHECK-NEXT: .cfi_offset r4, -16
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; CHECK-NEXT: .save {ra_auth_code}
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; CHECK-NEXT: str r12, [sp, #-4]!
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; CHECK-NEXT: .cfi_def_cfa_offset 20
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; CHECK-NEXT: .cfi_offset ra_auth_code, -20
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; CHECK-NEXT: .pad #4
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; CHECK-NEXT: sub sp, #4
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; CHECK-NEXT: .cfi_def_cfa_offset 24
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; ...
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; CHECK: bl OUTLINED_FUNCTION_0
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; ...
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; CHECK: add sp, #4
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; CHECK-NEXT: ldr r12, [sp], #4
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; CHECK-NEXT: pop.w {r4, r5, r6, lr}
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; CHECK-NEXT: aut r12, lr, sp
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; CHECK-NEXT: bx lr
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; CHEK-LABEL: OUTLINED_FUNCTION_0:
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; CHECK-NOT: pac
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; CHECK-NOT: aut
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; CHECK: b _Z1hii
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attributes #0 = { minsize noinline optsize "denormal-fp-math"="preserve-sign,preserve-sign" "denormal-fp-math-f32"="ieee,ieee" "disable-tail-calls"="false" "frame-pointer"="none" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="true" "no-jump-tables"="false" "no-nans-fp-math"="true" "no-signed-zeros-fp-math"="true" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="cortex-m3" "target-features"="+armv7-m,+hwdiv,+thumb-mode" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind }
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attributes #2 = { noreturn }
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!llvm.module.flags = !{!0, !1, !2}
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!0 = !{i32 8, !"branch-target-enforcement", i32 0}
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!1 = !{i32 8, !"sign-return-address", i32 1}
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!2 = !{i32 8, !"sign-return-address-all", i32 0}
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; UNWIND-LABEL: FunctionAddress: 0x0
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; UNWIND: Opcodes
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; UNWIND-NEXT: 0x00 ; vsp = vsp + 4
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; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
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; UNWIND-NEXT: 0x84 0x08 ; pop {r7, lr}
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; UNWIND-NEXT: 0xB0 ; finish
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; UNWIND-NEXT: 0xB0 ; finish
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; UNWIND-LABEL: FunctionAddress: 0x3C
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; UNWIND: Opcodes
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; UNWIND-NEXT: 0x00 ; vsp = vsp + 4
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; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
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; UNWIND-NEXT: 0xAA ; pop {r4, r5, r6, lr}
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; UNWIND-LABEL: FunctionAddress: 0x72
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; UNWIND: Opcodes
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; UNWIND-NEXT: 0x00 ; vsp = vsp + 4
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; UNWIND-NEXT: 0xB4 ; pop ra_auth_code
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; UNWIND-NEXT: 0xAA ; pop {r4, r5, r6, lr}
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; UNWIND-LABEL: FunctionAddress: 0xA8
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; UNWIND: Opcodes
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; UNWIND-NEXT: 0xB0 ; finish
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; UNWIND-NEXT: 0xB0 ; finish
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; UNWIND-NEXT: 0xB0 ; finish
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; UNWIND: 000000a9 {{.*}} OUTLINED_FUNCTION_0
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; UWNIND: 00000001 {{.*}} _Z1hii
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; UWNIND: 0000003d {{.*}} _Z1fiiii
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; UWNIND: 00000073 {{.*}} _Z1giiii
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