; LLVM IR from lanl/Fierro :: single-node-refactor/src/input/Yaml.ll (ZN4Yaml13ConstIteratorD2Ev)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%"class.Yaml::ConstIterator" = type { i32, ptr }

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN4Yaml13ConstIteratorD2Ev(ptr noundef nonnull align 8 dereferenceable(16) %0) unnamed_addr #0 align 2 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8
  %4 = getelementptr inbounds %"class.Yaml::ConstIterator", ptr %3, i32 0, i32 1
  %5 = load ptr, ptr %4, align 8, !tbaa !9
  %6 = icmp ne ptr %5, null
  br i1 %6, label %7, label %30

7:                                                ; preds = %1
  %8 = getelementptr inbounds %"class.Yaml::ConstIterator", ptr %3, i32 0, i32 0
  %9 = load i32, ptr %8, align 8, !tbaa !12
  switch i32 %9, label %28 [
    i32 1, label %10
    i32 2, label %19
  ]

10:                                               ; preds = %7
  %11 = getelementptr inbounds %"class.Yaml::ConstIterator", ptr %3, i32 0, i32 1
  %12 = load ptr, ptr %11, align 8, !tbaa !9
  %13 = icmp eq ptr %12, null
  br i1 %13, label %18, label %14

14:                                               ; preds = %10
  %15 = load ptr, ptr %12, align 8, !tbaa !13
  %16 = getelementptr inbounds ptr, ptr %15, i64 1
  %17 = load ptr, ptr %16, align 8
  call void %17(ptr noundef nonnull align 8 dereferenceable(16) %12) #1
  br label %18

18:                                               ; preds = %14, %10
  br label %29

19:                                               ; preds = %7
  %20 = getelementptr inbounds %"class.Yaml::ConstIterator", ptr %3, i32 0, i32 1
  %21 = load ptr, ptr %20, align 8, !tbaa !9
  %22 = icmp eq ptr %21, null
  br i1 %22, label %27, label %23

23:                                               ; preds = %19
  %24 = load ptr, ptr %21, align 8, !tbaa !13
  %25 = getelementptr inbounds ptr, ptr %24, i64 1
  %26 = load ptr, ptr %25, align 8
  call void %26(ptr noundef nonnull align 8 dereferenceable(16) %21) #1
  br label %27

27:                                               ; preds = %23, %19
  br label %29

28:                                               ; preds = %7
  br label %29

29:                                               ; preds = %28, %27, %18
  br label %30

30:                                               ; preds = %29, %1
  ret void
}

attributes #0 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"_ZTSN4Yaml13ConstIteratorE", !11, i64 0, !6, i64 8}
!11 = !{!"_ZTSN4Yaml13ConstIterator5eTypeE", !7, i64 0}
!12 = !{!10, !11, i64 0}
!13 = !{!14, !14, i64 0}
!14 = !{!"vtable pointer", !8, i64 0}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_ZN4Yaml13ConstIteratorD2Ev(ptr nocapture noundef nonnull readonly align 8 dereferenceable(16) %0) unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %.not = icmp eq ptr %3, null
  br i1 %.not, label %9, label %4

4:                                                ; preds = %1
  %5 = load i32, ptr %0, align 8, !tbaa !11
  %.off = add i32 %5, -1
  %switch = icmp ult i32 %.off, 2
  br i1 %switch, label %.sink.split, label %9

.sink.split:                                      ; preds = %4
  %6 = load ptr, ptr %3, align 8, !tbaa !12
  %7 = getelementptr inbounds i8, ptr %6, i64 8
  %8 = load ptr, ptr %7, align 8
  tail call void %8(ptr noundef nonnull align 8 dereferenceable(16) %3) #1
  br label %9

9:                                                ; preds = %4, %.sink.split, %1
  ret void
}

attributes #0 = { mustprogress nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !10, i64 8}
!6 = !{!"_ZTSN4Yaml13ConstIteratorE", !7, i64 0, !10, i64 8}
!7 = !{!"_ZTSN4Yaml13ConstIterator5eTypeE", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!13, !13, i64 0}
!13 = !{!"vtable pointer", !9, i64 0}


; Effective O3 passes: EarlyCSEPass,IPSCCPPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass