; LLVM IR from codemistic/Data-Structures-and-Algorithms :: CPP/LINKED LIST/DOUBLY LINKED LIST (doublylinkedlistpractice)

; 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"

; Function Attrs: mustprogress uwtable
declare dso_local void @_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 @_Z12insertattailP4nodei(ptr noundef, i32 noundef) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z16insertatpositionRP4nodeS1_ii(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8), i32 noundef, i32 noundef) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9printnodeRP4node(ptr noundef nonnull align 8 dereferenceable(8)) #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
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #6
  %7 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 24) #7
  invoke void @_ZN4nodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %7, i32 noundef 3)
          to label %8 unwind label %12

8:                                                ; preds = %0
  store ptr %7, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #6
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %9, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #6
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %10, ptr %6, align 8, !tbaa !5
  call void @_Z12insertatheadRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %5, i32 noundef 43)
  %11 = load ptr, ptr %6, align 8, !tbaa !5
  call void @_Z12insertattailP4nodei(ptr noundef %11, i32 noundef 40)
  call void @_Z16insertatpositionRP4nodeS1_ii(ptr noundef nonnull align 8 dereferenceable(8) %5, ptr noundef nonnull align 8 dereferenceable(8) %6, i32 noundef 20, i32 noundef 3)
  call void @_Z9printnodeRP4node(ptr noundef nonnull align 8 dereferenceable(8) %5)
  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

12:                                               ; preds = %0
  %13 = landingpad { ptr, i32 }
          cleanup
  %14 = extractvalue { ptr, i32 } %13, 0
  store ptr %14, ptr %3, align 8
  %15 = extractvalue { ptr, i32 } %13, 1
  store i32 %15, ptr %4, align 4
  call void @_ZdlPvm(ptr noundef %7, i64 noundef 24) #8
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #6
  br label %16

16:                                               ; preds = %12
  %17 = load ptr, ptr %3, align 8
  %18 = load i32, ptr %4, align 4
  %19 = insertvalue { ptr, i32 } poison, ptr %17, 0
  %20 = insertvalue { ptr, i32 } %19, i32 %18, 1
  resume { ptr, i32 } %20
}

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"}


; 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 void @_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 @_Z12insertattailP4nodei(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z16insertatpositionRP4nodeS1_ii(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8), i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9printnodeRP4node(ptr noundef nonnull align 8 dereferenceable(8)) 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
  %2 = alloca ptr, align 8
  %3 = tail call noalias noundef nonnull dereferenceable(24) ptr @_Znwm(i64 noundef 24) #5
  tail call void @_ZN4nodeC2Ei(ptr noundef nonnull align 8 dereferenceable(24) %3, i32 noundef 3)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #6
  store ptr %3, ptr %1, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #6
  store ptr %3, ptr %2, align 8, !tbaa !5
  call void @_Z12insertatheadRP4nodei(ptr noundef nonnull align 8 dereferenceable(8) %1, i32 noundef 43)
  call void @_Z12insertattailP4nodei(ptr noundef nonnull %3, i32 noundef 40)
  call void @_Z16insertatpositionRP4nodeS1_ii(ptr noundef nonnull align 8 dereferenceable(8) %1, ptr noundef nonnull align 8 dereferenceable(8) %2, i32 noundef 20, i32 noundef 3)
  call void @_Z9printnodeRP4node(ptr noundef nonnull align 8 dereferenceable(8) %1)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #6
  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 = { builtin allocsize(0) }
attributes #6 = { 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"}


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