; LLVM IR from devparthgarg/Data-Structures-and-Algorithms :: 11. Linked List/23 Circular Doubly Linked List (23 Circular Doubly Linked List)

; 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.Node = type { i32, ptr, ptr }

; Function Attrs: mustprogress uwtable
declare dso_local noundef ptr @_Z12insertAtHeadRP4Nodei(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) unnamed_addr #3 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5printP4Node(ptr noundef) #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #5 personality ptr @__gxx_personality_v0 {
  %1 = alloca i32, align 4
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #6
  %8 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 24) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %8, i32 noundef 10)
          to label %9 unwind label %43

9:                                                ; preds = %0
  store ptr %8, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #6
  %10 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 24) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %10, i32 noundef 20)
          to label %11 unwind label %47

11:                                               ; preds = %9
  store ptr %10, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #6
  %12 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 24) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %12, i32 noundef 30)
          to label %13 unwind label %51

13:                                               ; preds = %11
  store ptr %12, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #6
  %14 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 24) #7
  invoke void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %14, i32 noundef 40)
          to label %15 unwind label %55

15:                                               ; preds = %13
  store ptr %14, ptr %7, align 8, !tbaa !5
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load ptr, ptr %2, align 8, !tbaa !5
  %18 = getelementptr inbounds %class.Node, ptr %17, i32 0, i32 2
  store ptr %16, ptr %18, align 8, !tbaa !9
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = load ptr, ptr %5, align 8, !tbaa !5
  %21 = getelementptr inbounds %class.Node, ptr %20, i32 0, i32 2
  store ptr %19, ptr %21, align 8, !tbaa !9
  %22 = load ptr, ptr %7, align 8, !tbaa !5
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  %24 = getelementptr inbounds %class.Node, ptr %23, i32 0, i32 2
  store ptr %22, ptr %24, align 8, !tbaa !9
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = load ptr, ptr %7, align 8, !tbaa !5
  %27 = getelementptr inbounds %class.Node, ptr %26, i32 0, i32 2
  store ptr %25, ptr %27, align 8, !tbaa !9
  %28 = load ptr, ptr %7, align 8, !tbaa !5
  %29 = load ptr, ptr %2, align 8, !tbaa !5
  %30 = getelementptr inbounds %class.Node, ptr %29, i32 0, i32 1
  store ptr %28, ptr %30, align 8, !tbaa !12
  %31 = load ptr, ptr %2, align 8, !tbaa !5
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = getelementptr inbounds %class.Node, ptr %32, i32 0, i32 1
  store ptr %31, ptr %33, align 8, !tbaa !12
  %34 = load ptr, ptr %5, align 8, !tbaa !5
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  %36 = getelementptr inbounds %class.Node, ptr %35, i32 0, i32 1
  store ptr %34, ptr %36, align 8, !tbaa !12
  %37 = load ptr, ptr %6, align 8, !tbaa !5
  %38 = load ptr, ptr %7, align 8, !tbaa !5
  %39 = getelementptr inbounds %class.Node, ptr %38, i32 0, i32 1
  store ptr %37, ptr %39, align 8, !tbaa !12
  %40 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_Z5printP4Node(ptr noundef %40)
  %41 = call noundef ptr @_Z12insertAtHeadRP4Nodei(ptr noundef nonnull align 8 dereferenceable(8) %2, i32 noundef 50)
  store ptr %41, ptr %2, align 8, !tbaa !5
  %42 = load ptr, ptr %2, align 8, !tbaa !5
  call void @_Z5printP4Node(ptr noundef %42)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #6
  ret i32 0

43:                                               ; preds = %0
  %44 = landingpad { ptr, i32 }
          cleanup
  %45 = extractvalue { ptr, i32 } %44, 0
  store ptr %45, ptr %3, align 8
  %46 = extractvalue { ptr, i32 } %44, 1
  store i32 %46, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %8, i64 noundef 24) #8
  br label %61

47:                                               ; preds = %9
  %48 = landingpad { ptr, i32 }
          cleanup
  %49 = extractvalue { ptr, i32 } %48, 0
  store ptr %49, ptr %3, align 8
  %50 = extractvalue { ptr, i32 } %48, 1
  store i32 %50, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %10, i64 noundef 24) #8
  br label %60

51:                                               ; preds = %11
  %52 = landingpad { ptr, i32 }
          cleanup
  %53 = extractvalue { ptr, i32 } %52, 0
  store ptr %53, ptr %3, align 8
  %54 = extractvalue { ptr, i32 } %52, 1
  store i32 %54, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %12, i64 noundef 24) #8
  br label %59

55:                                               ; preds = %13
  %56 = landingpad { ptr, i32 }
          cleanup
  %57 = extractvalue { ptr, i32 } %56, 0
  store ptr %57, ptr %3, align 8
  %58 = extractvalue { ptr, i32 } %56, 1
  store i32 %58, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %14, i64 noundef 24) #8
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #6
  br label %59

59:                                               ; preds = %55, %51
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #6
  br label %60

60:                                               ; preds = %59, %47
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  br label %61

61:                                               ; preds = %60, %43
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #6
  br label %62

62:                                               ; preds = %61
  %63 = load ptr, ptr %3, align 8
  %64 = load i32, ptr %4, align 4
  %65 = insertvalue { ptr, i32 } poison, ptr %63, 0
  %66 = insertvalue { ptr, i32 } %65, i32 %64, 1
  resume { ptr, i32 } %66
}

attributes #0 = { mustprogress 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nobuiltin allocsize(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 #3 = { 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 #4 = { nobuiltin nounwind "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 #5 = { mustprogress norecurse 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 #6 = { nounwind }
attributes #7 = { builtin allocsize(0) }
attributes #8 = { builtin 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 16}
!10 = !{!"_ZTS4Node", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 8}


; 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 uwtable
declare dso_local noundef ptr @_Z12insertAtHeadRP4Nodei(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24), i32 noundef) unnamed_addr #3 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z5printP4Node(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #4 personality ptr @__gxx_personality_v0 {
  %1 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #5
  %2 = tail call noalias noundef nonnull dereferenceable(24) ptr @_Znwm(i64 noundef 24) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %2, i32 noundef 10)
  store ptr %2, ptr %1, align 8, !tbaa !5
  %3 = tail call noalias noundef nonnull dereferenceable(24) ptr @_Znwm(i64 noundef 24) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %3, i32 noundef 20)
  %4 = tail call noalias noundef nonnull dereferenceable(24) ptr @_Znwm(i64 noundef 24) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %4, i32 noundef 30)
  %5 = tail call noalias noundef nonnull dereferenceable(24) ptr @_Znwm(i64 noundef 24) #6
  tail call void @_ZN4NodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %5, i32 noundef 40)
  %6 = getelementptr inbounds i8, ptr %2, i64 16
  store ptr %3, ptr %6, align 8, !tbaa !9
  %7 = getelementptr inbounds i8, ptr %3, i64 16
  store ptr %4, ptr %7, align 8, !tbaa !9
  %8 = getelementptr inbounds i8, ptr %4, i64 16
  store ptr %5, ptr %8, align 8, !tbaa !9
  %9 = getelementptr inbounds i8, ptr %5, i64 16
  store ptr %2, ptr %9, align 8, !tbaa !9
  %10 = getelementptr inbounds i8, ptr %2, i64 8
  store ptr %5, ptr %10, align 8, !tbaa !12
  %11 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %2, ptr %11, align 8, !tbaa !12
  %12 = getelementptr inbounds i8, ptr %4, i64 8
  store ptr %3, ptr %12, align 8, !tbaa !12
  %13 = getelementptr inbounds i8, ptr %5, i64 8
  store ptr %4, ptr %13, align 8, !tbaa !12
  tail call void @_Z5printP4Node(ptr noundef nonnull %2)
  %14 = call noundef ptr @_Z12insertAtHeadRP4Nodei(ptr noundef nonnull align 8 dereferenceable(8) %1, i32 noundef 50)
  store ptr %14, ptr %1, align 8, !tbaa !5
  call void @_Z5printP4Node(ptr noundef %14)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #5
  ret i32 0
}

attributes #0 = { mustprogress 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nobuiltin allocsize(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 #3 = { 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 #4 = { mustprogress norecurse 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 #5 = { nounwind }
attributes #6 = { builtin allocsize(0) }

!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 16}
!10 = !{!"_ZTS4Node", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 8}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass