; LLVM IR from HarshCasper/NeoAlgo :: C/ds (Mirror_BinaryTree)

; 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"

%struct.Node = type { ptr, i32, ptr }

@count = external dso_local global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local ptr @insert(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = icmp eq ptr %5, null
  br i1 %6, label %7, label %18

7:                                                ; preds = %2
  %8 = call noalias ptr @malloc(i64 noundef 24) #2
  store ptr %8, ptr %3, align 8, !tbaa !5
  %9 = load ptr, ptr %3, align 8, !tbaa !5
  %10 = getelementptr inbounds %struct.Node, ptr %9, i32 0, i32 2
  store ptr null, ptr %10, align 8, !tbaa !11
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.Node, ptr %11, i32 0, i32 0
  store ptr null, ptr %12, align 8, !tbaa !13
  %13 = load i32, ptr %4, align 4, !tbaa !9
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.Node, ptr %14, i32 0, i32 1
  store i32 %13, ptr %15, align 8, !tbaa !14
  %16 = load i32, ptr @count, align 4, !tbaa !9
  %17 = add nsw i32 %16, 1
  store i32 %17, ptr @count, align 4, !tbaa !9
  br label %39

18:                                               ; preds = %2
  %19 = load i32, ptr @count, align 4, !tbaa !9
  %20 = srem i32 %19, 2
  %21 = icmp eq i32 %20, 0
  br i1 %21, label %22, label %30

22:                                               ; preds = %18
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.Node, ptr %23, i32 0, i32 0
  %25 = load ptr, ptr %24, align 8, !tbaa !13
  %26 = load i32, ptr %4, align 4, !tbaa !9
  %27 = call ptr @insert(ptr noundef %25, i32 noundef %26)
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  %29 = getelementptr inbounds %struct.Node, ptr %28, i32 0, i32 0
  store ptr %27, ptr %29, align 8, !tbaa !13
  br label %38

30:                                               ; preds = %18
  %31 = load ptr, ptr %3, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.Node, ptr %31, i32 0, i32 2
  %33 = load ptr, ptr %32, align 8, !tbaa !11
  %34 = load i32, ptr %4, align 4, !tbaa !9
  %35 = call ptr @insert(ptr noundef %33, i32 noundef %34)
  %36 = load ptr, ptr %3, align 8, !tbaa !5
  %37 = getelementptr inbounds %struct.Node, ptr %36, i32 0, i32 2
  store ptr %35, ptr %37, align 8, !tbaa !11
  br label %38

38:                                               ; preds = %30, %22
  br label %39

39:                                               ; preds = %38, %7
  %40 = load ptr, ptr %3, align 8, !tbaa !5
  ret ptr %40
}

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #1

attributes #0 = { 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 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 #2 = { nounwind 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 16}
!12 = !{!"Node", !6, i64 0, !10, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 0}
!14 = !{!12, !10, 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"

@count = external dso_local local_unnamed_addr global i32, align 4

; Function Attrs: nofree nounwind uwtable
define dso_local noundef ptr @insert(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %0, null
  br i1 %3, label %common.ret, label %9

common.ret:                                       ; preds = %2
  %4 = tail call noalias dereferenceable_or_null(24) ptr @malloc(i64 noundef 24) #2
  %5 = getelementptr inbounds i8, ptr %4, i64 16
  store ptr null, ptr %5, align 8, !tbaa !5
  store ptr null, ptr %4, align 8, !tbaa !11
  %6 = getelementptr inbounds i8, ptr %4, i64 8
  store i32 %1, ptr %6, align 8, !tbaa !12
  %7 = load i32, ptr @count, align 4, !tbaa !13
  %8 = add nsw i32 %7, 1
  store i32 %8, ptr @count, align 4, !tbaa !13
  br label %common.ret12

9:                                                ; preds = %2
  %10 = load i32, ptr @count, align 4, !tbaa !13
  %11 = and i32 %10, 1
  %12 = icmp eq i32 %11, 0
  br i1 %12, label %13, label %16

common.ret12:                                     ; preds = %16, %13, %common.ret
  %common.ret12.op = phi ptr [ %4, %common.ret ], [ %0, %13 ], [ %0, %16 ]
  ret ptr %common.ret12.op

13:                                               ; preds = %9
  %14 = load ptr, ptr %0, align 8, !tbaa !11
  %15 = tail call ptr @insert(ptr noundef %14, i32 noundef %1)
  store ptr %15, ptr %0, align 8, !tbaa !11
  br label %common.ret12

16:                                               ; preds = %9
  %17 = getelementptr inbounds i8, ptr %0, i64 16
  %18 = load ptr, ptr %17, align 8, !tbaa !5
  %19 = tail call ptr @insert(ptr noundef %18, i32 noundef %1)
  store ptr %19, ptr %17, align 8, !tbaa !5
  br label %common.ret12
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

attributes #0 = { nofree 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 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 #2 = { nounwind 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, !7, i64 16}
!6 = !{!"Node", !7, i64 0, !10, i64 8, !7, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!6, !10, i64 8}
!13 = !{!10, !10, i64 0}


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