; LLVM IR from xxks-kkk/algo :: trees/BinarySearchTree (bst)

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

; Function Attrs: nounwind uwtable
define dso_local ptr @insert(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !9
  %5 = load ptr, ptr %4, align 8, !tbaa !9
  %6 = icmp eq ptr %5, null
  br i1 %6, label %7, label %16

7:                                                ; preds = %2
  %8 = call noalias ptr @malloc(i64 noundef 24) #2
  store ptr %8, ptr %4, align 8, !tbaa !9
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = load ptr, ptr %4, align 8, !tbaa !9
  %11 = getelementptr inbounds %struct.TreeNode, ptr %10, i32 0, i32 0
  store i32 %9, ptr %11, align 8, !tbaa !11
  %12 = load ptr, ptr %4, align 8, !tbaa !9
  %13 = getelementptr inbounds %struct.TreeNode, ptr %12, i32 0, i32 2
  store ptr null, ptr %13, align 8, !tbaa !13
  %14 = load ptr, ptr %4, align 8, !tbaa !9
  %15 = getelementptr inbounds %struct.TreeNode, ptr %14, i32 0, i32 1
  store ptr null, ptr %15, align 8, !tbaa !14
  br label %46

16:                                               ; preds = %2
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = load ptr, ptr %4, align 8, !tbaa !9
  %19 = getelementptr inbounds %struct.TreeNode, ptr %18, i32 0, i32 0
  %20 = load i32, ptr %19, align 8, !tbaa !11
  %21 = icmp slt i32 %17, %20
  br i1 %21, label %22, label %30

22:                                               ; preds = %16
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = load ptr, ptr %4, align 8, !tbaa !9
  %25 = getelementptr inbounds %struct.TreeNode, ptr %24, i32 0, i32 1
  %26 = load ptr, ptr %25, align 8, !tbaa !14
  %27 = call ptr @insert(i32 noundef %23, ptr noundef %26)
  %28 = load ptr, ptr %4, align 8, !tbaa !9
  %29 = getelementptr inbounds %struct.TreeNode, ptr %28, i32 0, i32 1
  store ptr %27, ptr %29, align 8, !tbaa !14
  br label %45

30:                                               ; preds = %16
  %31 = load i32, ptr %3, align 4, !tbaa !5
  %32 = load ptr, ptr %4, align 8, !tbaa !9
  %33 = getelementptr inbounds %struct.TreeNode, ptr %32, i32 0, i32 0
  %34 = load i32, ptr %33, align 8, !tbaa !11
  %35 = icmp sgt i32 %31, %34
  br i1 %35, label %36, label %44

36:                                               ; preds = %30
  %37 = load i32, ptr %3, align 4, !tbaa !5
  %38 = load ptr, ptr %4, align 8, !tbaa !9
  %39 = getelementptr inbounds %struct.TreeNode, ptr %38, i32 0, i32 2
  %40 = load ptr, ptr %39, align 8, !tbaa !13
  %41 = call ptr @insert(i32 noundef %37, ptr noundef %40)
  %42 = load ptr, ptr %4, align 8, !tbaa !9
  %43 = getelementptr inbounds %struct.TreeNode, ptr %42, i32 0, i32 2
  store ptr %41, ptr %43, align 8, !tbaa !13
  br label %44

44:                                               ; preds = %36, %30
  br label %45

45:                                               ; preds = %44, %22
  br label %46

46:                                               ; preds = %45, %7
  %47 = load ptr, ptr %4, align 8, !tbaa !9
  ret ptr %47
}

; 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"TreeNode", !6, i64 0, !10, i64 8, !10, i64 16}
!13 = !{!12, !10, i64 16}
!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"

; Function Attrs: nofree nounwind uwtable
define dso_local noundef ptr @insert(i32 noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %1, null
  br i1 %3, label %4, label %7

4:                                                ; preds = %2
  %5 = tail call noalias dereferenceable_or_null(24) ptr @malloc(i64 noundef 24) #3
  store i32 %0, ptr %5, align 8, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %5, i64 8
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(16) %6, i8 0, i64 16, i1 false)
  br label %common.ret18

7:                                                ; preds = %2
  %8 = load i32, ptr %1, align 8, !tbaa !5
  %9 = icmp sgt i32 %8, %0
  br i1 %9, label %10, label %14

common.ret18:                                     ; preds = %14, %4, %16, %10
  %common.ret18.op = phi ptr [ %1, %10 ], [ %1, %16 ], [ %5, %4 ], [ %1, %14 ]
  ret ptr %common.ret18.op

10:                                               ; preds = %7
  %11 = getelementptr inbounds i8, ptr %1, i64 8
  %12 = load ptr, ptr %11, align 8, !tbaa !11
  %13 = tail call ptr @insert(i32 noundef %0, ptr noundef %12)
  store ptr %13, ptr %11, align 8, !tbaa !11
  br label %common.ret18

14:                                               ; preds = %7
  %15 = icmp slt i32 %8, %0
  br i1 %15, label %16, label %common.ret18

16:                                               ; preds = %14
  %17 = getelementptr inbounds i8, ptr %1, i64 16
  %18 = load ptr, ptr %17, align 8, !tbaa !12
  %19 = tail call ptr @insert(i32 noundef %0, ptr noundef %18)
  store ptr %19, ptr %17, align 8, !tbaa !12
  br label %common.ret18
}

; 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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2

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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #3 = { 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 0}
!6 = !{!"TreeNode", !7, i64 0, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !10, i64 16}


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